Exemple #1
0
static int idcin_read_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    IdcinDemuxContext *idcin = s->priv_data;
    AVStream *st;
    unsigned int width, height;
    unsigned int sample_rate, bytes_per_sample, channels;
    int ret;

    /* get the 5 header parameters */
    width = avio_rl32(pb);
    height = avio_rl32(pb);
    sample_rate = avio_rl32(pb);
    bytes_per_sample = avio_rl32(pb);
    channels = avio_rl32(pb);

    if (s->pb->eof_reached) {
        av_log(s, AV_LOG_ERROR, "incomplete header\n");
        return s->pb->error ? s->pb->error : AVERROR_EOF;
    }

    if (av_image_check_size(width, height, 0, s) < 0)
        return AVERROR_INVALIDDATA;
    if (sample_rate > 0) {
        if (sample_rate < 14 || sample_rate > INT_MAX) {
            av_log(s, AV_LOG_ERROR, "invalid sample rate: %u\n", sample_rate);
            return AVERROR_INVALIDDATA;
        }
        if (bytes_per_sample < 1 || bytes_per_sample > 2) {
            av_log(s, AV_LOG_ERROR, "invalid bytes per sample: %u\n",
                   bytes_per_sample);
            return AVERROR_INVALIDDATA;
        }
        if (channels < 1 || channels > 2) {
            av_log(s, AV_LOG_ERROR, "invalid channels: %u\n", channels);
            return AVERROR_INVALIDDATA;
        }
        idcin->audio_present = 1;
    } else {
        /* if sample rate is 0, assume no audio */
        idcin->audio_present = 0;
    }

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    avpriv_set_pts_info(st, 33, 1, IDCIN_FPS);
    st->start_time = 0;
    idcin->video_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = AV_CODEC_ID_IDCIN;
    st->codec->codec_tag = 0;  /* no fourcc */
    st->codec->width = width;
    st->codec->height = height;

    /* load up the Huffman tables into extradata */
    st->codec->extradata_size = HUFFMAN_TABLE_SIZE;
    st->codec->extradata = av_malloc(HUFFMAN_TABLE_SIZE);
    ret = avio_read(pb, st->codec->extradata, HUFFMAN_TABLE_SIZE);
    if (ret < 0) {
        return ret;
    } else if (ret != HUFFMAN_TABLE_SIZE) {
        av_log(s, AV_LOG_ERROR, "incomplete header\n");
        return AVERROR(EIO);
    }

    if (idcin->audio_present) {
        idcin->audio_present = 1;
        st = avformat_new_stream(s, NULL);
        if (!st)
            return AVERROR(ENOMEM);
        avpriv_set_pts_info(st, 63, 1, sample_rate);
        st->start_time = 0;
        idcin->audio_stream_index = st->index;
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
        st->codec->codec_tag = 1;
        st->codec->channels = channels;
        st->codec->channel_layout = channels > 1 ? AV_CH_LAYOUT_STEREO :
                                                   AV_CH_LAYOUT_MONO;
        st->codec->sample_rate = sample_rate;
        st->codec->bits_per_coded_sample = bytes_per_sample * 8;
        st->codec->bit_rate = sample_rate * bytes_per_sample * 8 * channels;
        st->codec->block_align = idcin->block_align = bytes_per_sample * channels;
        if (bytes_per_sample == 1)
            st->codec->codec_id = AV_CODEC_ID_PCM_U8;
        else
            st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;

        if (sample_rate % 14 != 0) {
            idcin->audio_chunk_size1 = (sample_rate / 14) *
            bytes_per_sample * channels;
            idcin->audio_chunk_size2 = (sample_rate / 14 + 1) *
                bytes_per_sample * channels;
        } else {
            idcin->audio_chunk_size1 = idcin->audio_chunk_size2 =
                (sample_rate / 14) * bytes_per_sample * channels;
        }
        idcin->current_audio_chunk = 0;
    }

    idcin->next_chunk_is_video = 1;
    idcin->first_pkt_pos = avio_tell(s->pb);

    return 0;
}
Exemple #2
0
static int swf_write_video(AVFormatContext *s,
                           AVCodecContext *enc, const uint8_t *buf, int size)
{
    SWFContext *swf = s->priv_data;
    AVIOContext *pb = s->pb;

    /* Flash Player limit */
    if (swf->swf_frame_number == 16000)
        av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");

    if (enc->codec_id == CODEC_ID_VP6F ||
        enc->codec_id == CODEC_ID_FLV1) {
        if (swf->video_frame_number == 0) {
            /* create a new video object */
            put_swf_tag(s, TAG_VIDEOSTREAM);
            avio_wl16(pb, VIDEO_ID);
            swf->vframes_pos = avio_tell(pb);
            avio_wl16(pb, 15000); /* hard flash player limit */
            avio_wl16(pb, enc->width);
            avio_wl16(pb, enc->height);
            avio_w8(pb, 0);
            avio_w8(pb,ff_codec_get_tag(swf_codec_tags,enc->codec_id));
            put_swf_end_tag(s);

            /* place the video object for the first time */
            put_swf_tag(s, TAG_PLACEOBJECT2);
            avio_w8(pb, 0x36);
            avio_wl16(pb, 1);
            avio_wl16(pb, VIDEO_ID);
            put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0);
            avio_wl16(pb, swf->video_frame_number);
            avio_write(pb, "video", 5);
            avio_w8(pb, 0x00);
            put_swf_end_tag(s);
        } else {
            /* mark the character for update */
            put_swf_tag(s, TAG_PLACEOBJECT2);
            avio_w8(pb, 0x11);
            avio_wl16(pb, 1);
            avio_wl16(pb, swf->video_frame_number);
            put_swf_end_tag(s);
        }

        /* set video frame data */
        put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG);
        avio_wl16(pb, VIDEO_ID);
        avio_wl16(pb, swf->video_frame_number++);
        avio_write(pb, buf, size);
        put_swf_end_tag(s);
    } else if (enc->codec_id == CODEC_ID_MJPEG) {
        if (swf->swf_frame_number > 0) {
            /* remove the shape */
            put_swf_tag(s, TAG_REMOVEOBJECT);
            avio_wl16(pb, SHAPE_ID); /* shape ID */
            avio_wl16(pb, 1); /* depth */
            put_swf_end_tag(s);

            /* free the bitmap */
            put_swf_tag(s, TAG_FREECHARACTER);
            avio_wl16(pb, BITMAP_ID);
            put_swf_end_tag(s);
        }

        put_swf_tag(s, TAG_JPEG2 | TAG_LONG);

        avio_wl16(pb, BITMAP_ID); /* ID of the image */

        /* a dummy jpeg header seems to be required */
        avio_wb32(pb, 0xffd8ffd9);
        /* write the jpeg image */
        avio_write(pb, buf, size);

        put_swf_end_tag(s);

        /* draw the shape */

        put_swf_tag(s, TAG_PLACEOBJECT);
        avio_wl16(pb, SHAPE_ID); /* shape ID */
        avio_wl16(pb, 1); /* depth */
        put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0);
        put_swf_end_tag(s);
    }

    swf->swf_frame_number++;

    /* streaming sound always should be placed just before showframe tags */
    if (swf->audio_enc && av_fifo_size(swf->audio_fifo)) {
        int frame_size = av_fifo_size(swf->audio_fifo);
        put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
        avio_wl16(pb, swf->sound_samples);
        avio_wl16(pb, 0); // seek samples
        av_fifo_generic_read(swf->audio_fifo, pb, frame_size, &avio_write);
        put_swf_end_tag(s);

        /* update FIFO */
        swf->sound_samples = 0;
    }

    /* output the frame */
    put_swf_tag(s, TAG_SHOWFRAME);
    put_swf_end_tag(s);

    avio_flush(s->pb);

    return 0;
}
Exemple #3
0
static int caf_write_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;
    CAFContext *caf = s->priv_data;
    unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id);

    switch (enc->codec_id) {
    case AV_CODEC_ID_AAC:
    case AV_CODEC_ID_AC3:
        av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
        return AVERROR_PATCHWELCOME;
    }

    switch (enc->codec_id) {
    case AV_CODEC_ID_PCM_S8:
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S16BE:
    case AV_CODEC_ID_PCM_S24LE:
    case AV_CODEC_ID_PCM_S24BE:
    case AV_CODEC_ID_PCM_S32LE:
    case AV_CODEC_ID_PCM_S32BE:
    case AV_CODEC_ID_PCM_F32LE:
    case AV_CODEC_ID_PCM_F32BE:
    case AV_CODEC_ID_PCM_F64LE:
    case AV_CODEC_ID_PCM_F64BE:
    case AV_CODEC_ID_PCM_ALAW:
    case AV_CODEC_ID_PCM_MULAW:
        codec_tag = MKTAG('l','p','c','m');
    }

    if (!codec_tag) {
        av_log(s, AV_LOG_ERROR, "unsupported codec\n");
        return AVERROR_INVALIDDATA;
    }

    if (!enc->block_align && !pb->seekable) {
        av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
        return AVERROR_INVALIDDATA;
    }

    ffio_wfourcc(pb, "caff"); //< mFileType
    avio_wb16(pb, 1);         //< mFileVersion
    avio_wb16(pb, 0);         //< mFileFlags

    ffio_wfourcc(pb, "desc");                         //< Audio Description chunk
    avio_wb64(pb, 32);                                //< mChunkSize
    avio_wb64(pb, av_double2int(enc->sample_rate));   //< mSampleRate
    avio_wl32(pb, codec_tag);                         //< mFormatID
    avio_wb32(pb, codec_flags(enc->codec_id));        //< mFormatFlags
    avio_wb32(pb, enc->block_align);                  //< mBytesPerPacket
    avio_wb32(pb, samples_per_packet(enc->codec_id, enc->channels)); //< mFramesPerPacket
    avio_wb32(pb, enc->channels);                     //< mChannelsPerFrame
    avio_wb32(pb, av_get_bits_per_sample(enc->codec_id)); //< mBitsPerChannel

    if (enc->channel_layout) {
        ffio_wfourcc(pb, "chan");
        avio_wb64(pb, 12);
        ff_mov_write_chan(pb, enc->channel_layout);
    }

    if (enc->codec_id == AV_CODEC_ID_ALAC) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, 12 + enc->extradata_size);
        avio_write(pb, "\0\0\0\14frmaalac", 12);
        avio_write(pb, enc->extradata, enc->extradata_size);
    } else if (enc->codec_id == AV_CODEC_ID_AMR_NB) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, 29);
        avio_write(pb, "\0\0\0\14frmasamr", 12);
        avio_wb32(pb, 0x11); /* size */
        avio_write(pb, "samrFFMP", 8);
        avio_w8(pb, 0); /* decoder version */

        avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
        avio_w8(pb, 0x00); /* Mode change period (no restriction) */
        avio_w8(pb, 0x01); /* Frames per sample */
    } else if (enc->codec_id == AV_CODEC_ID_QDM2) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, enc->extradata_size);
        avio_write(pb, enc->extradata, enc->extradata_size);
    }

    ffio_wfourcc(pb, "data"); //< Audio Data chunk
    caf->data = avio_tell(pb);
    avio_wb64(pb, -1);        //< mChunkSize
    avio_wb32(pb, 0);         //< mEditCount

    avio_flush(pb);
    return 0;
}
Exemple #4
0
static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
    TTAContext *c = s->priv_data;
    AVStream *st;
    int i, channels, bps, samplerate, datalen, framelen;
    uint64_t framepos, start_offset;

    if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
        ff_id3v1_read(s);

    start_offset = avio_tell(s->pb);
    if (avio_rl32(s->pb) != AV_RL32("TTA1"))
        return -1; // not tta file

    avio_skip(s->pb, 2); // FIXME: flags
    channels = avio_rl16(s->pb);
    bps = avio_rl16(s->pb);
    samplerate = avio_rl32(s->pb);
    if(samplerate <= 0 || samplerate > 1000000){
        av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
        return -1;
    }

    datalen = avio_rl32(s->pb);
    if(datalen < 0){
        av_log(s, AV_LOG_ERROR, "nonsense datalen\n");
        return -1;
    }

    avio_skip(s->pb, 4); // header crc

    framelen = samplerate*256/245;
    c->totalframes = datalen / framelen + ((datalen % framelen) ? 1 : 0);
    c->currentframe = 0;

    if(c->totalframes >= UINT_MAX/sizeof(uint32_t)){
        av_log(s, AV_LOG_ERROR, "totalframes too large\n");
        return -1;
    }

    st = av_new_stream(s, 0);
    if (!st)
        return AVERROR(ENOMEM);

    av_set_pts_info(st, 64, 1, samplerate);
    st->start_time = 0;
    st->duration = datalen;

    framepos = avio_tell(s->pb) + 4*c->totalframes + 4;

    for (i = 0; i < c->totalframes; i++) {
        uint32_t size = avio_rl32(s->pb);
        av_add_index_entry(st, framepos, i*framelen, size, 0, AVINDEX_KEYFRAME);
        framepos += size;
    }
    avio_skip(s->pb, 4); // seektable crc

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = CODEC_ID_TTA;
    st->codec->channels = channels;
    st->codec->sample_rate = samplerate;
    st->codec->bits_per_coded_sample = bps;

    st->codec->extradata_size = avio_tell(s->pb) - start_offset;
    if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
        //this check is redundant as avio_read should fail
        av_log(s, AV_LOG_ERROR, "extradata_size too large\n");
        return -1;
    }
    st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
    avio_seek(s->pb, start_offset, SEEK_SET);
    avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);

    return 0;
}
Exemple #5
0
static int rsd_read_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    int i, version, start = 0x800;
    AVCodecContext *codec;
    AVStream *st = avformat_new_stream(s, NULL);

    if (!st)
        return AVERROR(ENOMEM);

    avio_skip(pb, 3); // "RSD"
    version = avio_r8(pb) - '0';

    codec = st->codec;
    codec->codec_type = AVMEDIA_TYPE_AUDIO;
    codec->codec_tag  = avio_rl32(pb);
    codec->codec_id   = ff_codec_get_id(rsd_tags, codec->codec_tag);
    if (!codec->codec_id) {
        char tag_buf[5];

        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
        for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
            if (codec->codec_tag == rsd_unsupported_tags[i]) {
                avpriv_request_sample(s, "Codec tag: %s", tag_buf);
                return AVERROR_PATCHWELCOME;
            }
        }
        av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
        return AVERROR_INVALIDDATA;
    }

    codec->channels = avio_rl32(pb);
    if (!codec->channels)
        return AVERROR_INVALIDDATA;

    avio_skip(pb, 4); // Bit depth
    codec->sample_rate = avio_rl32(pb);
    if (!codec->sample_rate)
        return AVERROR_INVALIDDATA;

    avio_skip(pb, 4); // Unknown

    switch (codec->codec_id) {
    case AV_CODEC_ID_ADPCM_IMA_RAD:
        codec->block_align = 20 * codec->channels;
        if (pb->seekable)
            st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
        break;
    case AV_CODEC_ID_ADPCM_THP:
        /* RSD3GADP is mono, so only alloc enough memory
           to store the coeff table for a single channel. */

        if (ff_alloc_extradata(codec, 32))
            return AVERROR(ENOMEM);

        start = avio_rl32(pb);

        if (avio_read(s->pb, codec->extradata, 32) != 32)
            return AVERROR_INVALIDDATA;

        for (i = 0; i < 16; i++)
            AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));

        if (pb->seekable)
            st->duration = (avio_size(pb) - start) / 8 * 14;
        break;
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S16BE:
        if (version != 4)
            start = avio_rl32(pb);

        if (pb->seekable)
            st->duration = (avio_size(pb) - start) / 2 / codec->channels;
        break;
    }

    avio_skip(pb, start - avio_tell(pb));

    avpriv_set_pts_info(st, 64, 1, codec->sample_rate);

    return 0;
}
static int gif_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    GIFDemuxContext *gdc = s->priv_data;
    AVIOContext *pb = s->pb;
    int packed_fields, block_label, ct_size,
        keyframe, frame_parsed = 0, ret;
    int64_t frame_start = avio_tell(pb), frame_end;
    unsigned char buf[6];

    if ((ret = avio_read(pb, buf, 6)) == 6) {
        keyframe = memcmp(buf, gif87a_sig, 6) == 0 ||
                   memcmp(buf, gif89a_sig, 6) == 0;
    } else if (ret < 0) {
        return ret;
    } else {
        keyframe = 0;
    }

    if (keyframe) {
parse_keyframe:
        /* skip 2 bytes of width and 2 of height */
        if ((ret = avio_skip(pb, 4)) < 0)
            return ret;

        packed_fields = avio_r8(pb);

        /* skip 1 byte of Background Color Index and 1 byte of Pixel Aspect Ratio */
        if ((ret = avio_skip(pb, 2)) < 0)
            return ret;

        /* global color table presence */
        if (packed_fields & 0x80) {
            ct_size = 3 * (1 << ((packed_fields & 0x07) + 1));

            if ((ret = avio_skip(pb, ct_size)) < 0)
                return ret;
        }
    } else {
        avio_seek(pb, -ret, SEEK_CUR);
        ret = AVERROR_EOF;
    }

    while (GIF_TRAILER != (block_label = avio_r8(pb)) && !url_feof(pb)) {
        if (block_label == GIF_EXTENSION_INTRODUCER) {
            if ((ret = gif_read_ext (s)) < 0 )
                goto resync;
        } else if (block_label == GIF_IMAGE_SEPARATOR) {
            /* skip to last byte of Image Descriptor header */
            if ((ret = avio_skip(pb, 8)) < 0)
                return ret;

            packed_fields = avio_r8(pb);

            /* local color table presence */
            if (packed_fields & 0x80) {
                ct_size = 3 * (1 << ((packed_fields & 0x07) + 1));

                if ((ret = avio_skip(pb, ct_size)) < 0)
                    return ret;
            }

            /* read LZW Minimum Code Size */
            if (avio_r8(pb) < 1) {
                av_log(s, AV_LOG_ERROR, "lzw minimum code size must be >= 1\n");
                goto resync;
            }

            if ((ret = gif_skip_subblocks(pb)) < 0)
                goto resync;

            frame_end = avio_tell(pb);

            if (avio_seek(pb, frame_start, SEEK_SET) != frame_start)
                return AVERROR(EIO);

            ret = av_get_packet(pb, pkt, frame_end - frame_start);
            if (ret < 0)
                return ret;

            if (keyframe)
                pkt->flags |= AV_PKT_FLAG_KEY;

            pkt->stream_index = 0;
            pkt->duration = gdc->delay;

            /* Graphic Control Extension's scope is single frame.
             * Remove its influence. */
            gdc->delay = gdc->default_delay;
            frame_parsed = 1;

            break;
        } else {
            av_log(s, AV_LOG_ERROR, "invalid block label\n");
resync:
            if (!keyframe)
                avio_seek(pb, frame_start, SEEK_SET);
            if ((ret = resync(pb)) < 0)
                return ret;
            frame_start = avio_tell(pb) - 6;
            keyframe = 1;
            goto parse_keyframe;
        }
    }

    if ((ret >= 0 && !frame_parsed) || ret == AVERROR_EOF) {
        /* This might happen when there is no image block
         * between extension blocks and GIF_TRAILER or EOF */
        if (!gdc->ignore_loop && (block_label == GIF_TRAILER || url_feof(pb))
            && (gdc->total_iter < 0 || ++gdc->iter_count < gdc->total_iter))
            return avio_seek(pb, 0, SEEK_SET);
        return AVERROR_EOF;
    } else
        return ret;
}
Exemple #7
0
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIOContext *pb      = s->pb;
    AVCodecContext *enc  = s->streams[pkt->stream_index]->codec;
    FLVContext *flv      = s->priv_data;
    FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
    unsigned ts;
    int size = pkt->size;
    uint8_t *data = NULL;
    int flags = -1, flags_size, ret;

    if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A ||
        enc->codec_id == AV_CODEC_ID_VP6  || enc->codec_id == AV_CODEC_ID_AAC)
        flags_size = 2;
    else if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4)
        flags_size = 5;
    else
        flags_size = 1;

    switch (enc->codec_type) {
    case AVMEDIA_TYPE_VIDEO:
        avio_w8(pb, FLV_TAG_TYPE_VIDEO);

        flags = enc->codec_tag;
        if (flags == 0) {
            av_log(s, AV_LOG_ERROR,
                   "Video codec '%s' is not compatible with FLV\n",
                   avcodec_get_name(enc->codec_id));
            return AVERROR(EINVAL);
        }

        flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
        break;
    case AVMEDIA_TYPE_AUDIO:
        flags = get_audio_flags(s, enc);

        av_assert0(size);

        avio_w8(pb, FLV_TAG_TYPE_AUDIO);
        break;
    case AVMEDIA_TYPE_DATA:
        avio_w8(pb, FLV_TAG_TYPE_META);
        break;
    default:
        return AVERROR(EINVAL);
    }

    if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) {
        /* check if extradata looks like mp4 formated */
        if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1)
            if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
                return ret;
    } else if (enc->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
               (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
        if (!s->streams[pkt->stream_index]->nb_frames) {
        av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
               "use audio bitstream filter 'aac_adtstoasc' to fix it "
               "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
        return AVERROR_INVALIDDATA;
        }
        av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
    }

    if (flv->delay == AV_NOPTS_VALUE)
        flv->delay = -pkt->dts;

    if (pkt->dts < -flv->delay) {
        av_log(s, AV_LOG_WARNING,
               "Packets are not in the proper order with respect to DTS\n");
        return AVERROR(EINVAL);
    }

    ts = pkt->dts + flv->delay; // add delay to force positive dts

    /* check Speex packet duration */
    if (enc->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
        av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
                                  "8 frames per packet. Adobe Flash "
                                  "Player cannot handle this!\n");

    if (sc->last_ts < ts)
        sc->last_ts = ts;

    avio_wb24(pb, size + flags_size);
    avio_wb24(pb, ts);
    avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
    avio_wb24(pb, flv->reserved);

    if (enc->codec_type == AVMEDIA_TYPE_DATA) {
        int data_size;
        int metadata_size_pos = avio_tell(pb);
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "onTextData");
        avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
        avio_wb32(pb, 2);
        put_amf_string(pb, "type");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "Text");
        put_amf_string(pb, "text");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, pkt->data);
        put_amf_string(pb, "");
        avio_w8(pb, AMF_END_OF_OBJECT);
        /* write total size of tag */
        data_size = avio_tell(pb) - metadata_size_pos;
        avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
        avio_wb24(pb, data_size);
        avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
        avio_wb32(pb, data_size + 11);
    } else {
        av_assert1(flags>=0);
        avio_w8(pb,flags);
        if (enc->codec_id == AV_CODEC_ID_VP6)
            avio_w8(pb,0);
        if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A) {
            if (enc->extradata_size)
                avio_w8(pb, enc->extradata[0]);
            else
                avio_w8(pb, ((FFALIGN(enc->width,  16) - enc->width) << 4) |
                             (FFALIGN(enc->height, 16) - enc->height));
        } else if (enc->codec_id == AV_CODEC_ID_AAC)
            avio_w8(pb, 1); // AAC raw
        else if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) {
            avio_w8(pb, 1); // AVC NALU
            avio_wb24(pb, pkt->pts - pkt->dts);
        }

        avio_write(pb, data ? data : pkt->data, size);

        avio_wb32(pb, size + flags_size + 11); // previous tag size
        flv->duration = FFMAX(flv->duration,
                              pkt->pts + flv->delay + pkt->duration);
    }

    av_free(data);

    return pb->error;
}
Exemple #8
0
static int xwma_read_header(AVFormatContext *s)
{
    int64_t size;
    int ret = 0;
    uint32_t dpds_table_size = 0;
    uint32_t *dpds_table = 0;
    unsigned int tag;
    AVIOContext *pb = s->pb;
    AVStream *st;
    XWMAContext *xwma = s->priv_data;
    int i;

    /* The following code is mostly copied from wav.c, with some
     * minor alterations.
     */

    /* check RIFF header */
    tag = avio_rl32(pb);
    if (tag != MKTAG('R', 'I', 'F', 'F'))
        return -1;
    avio_rl32(pb); /* file size */
    tag = avio_rl32(pb);
    if (tag != MKTAG('X', 'W', 'M', 'A'))
        return -1;

    /* parse fmt header */
    tag = avio_rl32(pb);
    if (tag != MKTAG('f', 'm', 't', ' '))
        return -1;
    size = avio_rl32(pb);
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    ret = ff_get_wav_header(pb, st->codec, size);
    if (ret < 0)
        return ret;
    st->need_parsing = AVSTREAM_PARSE_NONE;

    /* All xWMA files I have seen contained WMAv2 data. If there are files
     * using WMA Pro or some other codec, then we need to figure out the right
     * extradata for that. Thus, ask the user for feedback, but try to go on
     * anyway.
     */
    if (st->codec->codec_id != AV_CODEC_ID_WMAV2) {
        avpriv_request_sample(s, "Unexpected codec (tag 0x04%x; id %d)",
                              st->codec->codec_tag, st->codec->codec_id);
    } else {
        /* In all xWMA files I have seen, there is no extradata. But the WMA
         * codecs require extradata, so we provide our own fake extradata.
         *
         * First, check that there really was no extradata in the header. If
         * there was, then try to use it, after asking the user to provide a
         * sample of this unusual file.
         */
        if (st->codec->extradata_size != 0) {
            /* Surprise, surprise: We *did* get some extradata. No idea
             * if it will work, but just go on and try it, after asking
             * the user for a sample.
             */
            avpriv_request_sample(s, "Unexpected extradata (%d bytes)",
                                  st->codec->extradata_size);
        } else {
            st->codec->extradata_size = 6;
            st->codec->extradata      = av_mallocz(6 + FF_INPUT_BUFFER_PADDING_SIZE);
            if (!st->codec->extradata)
                return AVERROR(ENOMEM);

            /* setup extradata with our experimentally obtained value */
            st->codec->extradata[4] = 31;
        }
    }

    if (!st->codec->channels) {
        av_log(s, AV_LOG_WARNING, "Invalid channel count: %d\n",
               st->codec->channels);
        return AVERROR_INVALIDDATA;
    }
    if (!st->codec->bits_per_coded_sample) {
        av_log(s, AV_LOG_WARNING, "Invalid bits_per_coded_sample: %d\n",
               st->codec->bits_per_coded_sample);
        return AVERROR_INVALIDDATA;
    }

    /* set the sample rate */
    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

    /* parse the remaining RIFF chunks */
    for (;;) {
        if (pb->eof_reached) {
            ret = AVERROR_INVALIDDATA;
            goto fail;
        }
        /* read next chunk tag */
        tag = avio_rl32(pb);
        size = avio_rl32(pb);
        if (tag == MKTAG('d', 'a', 't', 'a')) {
            /* We assume that the data chunk comes last. */
            break;
        } else if (tag == MKTAG('d','p','d','s')) {
            /* Quoting the MSDN xWMA docs on the dpds chunk: "Contains the
             * decoded packet cumulative data size array, each element is the
             * number of bytes accumulated after the corresponding xWMA packet
             * is decoded in order."
             *
             * Each packet has size equal to st->codec->block_align, which in
             * all cases I saw so far was always 2230. Thus, we can use the
             * dpds data to compute a seeking index.
             */

            /* Error out if there is more than one dpds chunk. */
            if (dpds_table) {
                av_log(s, AV_LOG_ERROR, "two dpds chunks present\n");
                ret = AVERROR_INVALIDDATA;
                goto fail;
            }

            /* Compute the number of entries in the dpds chunk. */
            if (size & 3) {  /* Size should be divisible by four */
                av_log(s, AV_LOG_WARNING,
                       "dpds chunk size %"PRId64" not divisible by 4\n", size);
            }
            dpds_table_size = size / 4;
            if (dpds_table_size == 0 || dpds_table_size >= INT_MAX / 4) {
                av_log(s, AV_LOG_ERROR,
                       "dpds chunk size %"PRId64" invalid\n", size);
                return -1;
            }

            /* Allocate some temporary storage to keep the dpds data around.
             * for processing later on.
             */
            dpds_table = av_malloc(dpds_table_size * sizeof(uint32_t));
            if (!dpds_table) {
                return AVERROR(ENOMEM);
            }

            for (i = 0; i < dpds_table_size; ++i) {
                dpds_table[i] = avio_rl32(pb);
                size -= 4;
            }
        }
        avio_skip(pb, size);
    }

    /* Determine overall data length */
    if (size < 0) {
        ret = AVERROR_INVALIDDATA;
        goto fail;
    }
    if (!size) {
        xwma->data_end = INT64_MAX;
    } else
        xwma->data_end = avio_tell(pb) + size;


    if (dpds_table && dpds_table_size) {
        int64_t cur_pos;
        const uint32_t bytes_per_sample
                = (st->codec->channels * st->codec->bits_per_coded_sample) >> 3;

        /* Estimate the duration from the total number of output bytes. */
        const uint64_t total_decoded_bytes = dpds_table[dpds_table_size - 1];

        if (!bytes_per_sample) {
            av_log(s, AV_LOG_ERROR,
                   "Invalid bits_per_coded_sample %d for %d channels\n",
                   st->codec->bits_per_coded_sample, st->codec->channels);
            ret = AVERROR_INVALIDDATA;
            goto fail;
        }

        st->duration = total_decoded_bytes / bytes_per_sample;

        /* Use the dpds data to build a seek table.  We can only do this after
         * we know the offset to the data chunk, as we need that to determine
         * the actual offset to each input block.
         * Note: If we allowed ourselves to assume that the data chunk always
         * follows immediately after the dpds block, we could of course guess
         * the data block's start offset already while reading the dpds chunk.
         * I decided against that, just in case other chunks ever are
         * discovered.
         */
        cur_pos = avio_tell(pb);
        for (i = 0; i < dpds_table_size; ++i) {
            /* From the number of output bytes that would accumulate in the
             * output buffer after decoding the first (i+1) packets, we compute
             * an offset / timestamp pair.
             */
            av_add_index_entry(st,
                               cur_pos + (i+1) * st->codec->block_align, /* pos */
                               dpds_table[i] / bytes_per_sample,         /* timestamp */
                               st->codec->block_align,                   /* size */
                               0,                                        /* duration */
                               AVINDEX_KEYFRAME);
        }
    } else if (st->codec->bit_rate) {
Exemple #9
0
static int avi_write_header(AVFormatContext *s)
{
    AVIContext *avi = s->priv_data;
    AVIOContext *pb = s->pb;
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
    AVCodecContext *stream, *video_enc;
    int64_t list1, list2, strh, strf;
    AVDictionaryEntry *t = NULL;

    if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
        av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
               AVI_MAX_STREAM_COUNT);
        return -1;
    }

    for(n=0;n<s->nb_streams;n++) {
        s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
        if(!s->streams[n]->priv_data)
            return AVERROR(ENOMEM);
    }

    /* header list */
    avi->riff_id = 0;
    list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");

    /* avi header */
    ffio_wfourcc(pb, "avih");
    avio_wl32(pb, 14 * 4);
    bitrate = 0;

    video_enc = NULL;
    for(n=0;n<s->nb_streams;n++) {
        stream = s->streams[n]->codec;
        bitrate += stream->bit_rate;
        if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
            video_enc = stream;
    }

    nb_frames = 0;

    if(video_enc){
        avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
    } else {
        avio_wl32(pb, 0);
    }
    avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
    avio_wl32(pb, 0); /* padding */
    if (!pb->seekable)
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
    else
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
    avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
    avio_wl32(pb, nb_frames); /* nb frames, filled later */
    avio_wl32(pb, 0); /* initial frame */
    avio_wl32(pb, s->nb_streams); /* nb streams */
    avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
    if(video_enc){
        avio_wl32(pb, video_enc->width);
        avio_wl32(pb, video_enc->height);
    } else {
        avio_wl32(pb, 0);
        avio_wl32(pb, 0);
    }
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */

    /* stream list */
    for(i=0;i<n;i++) {
        AVIStream *avist= s->streams[i]->priv_data;
        list2 = ff_start_tag(pb, "LIST");
        ffio_wfourcc(pb, "strl");

        stream = s->streams[i]->codec;

        /* stream generic header */
        strh = ff_start_tag(pb, "strh");
        switch(stream->codec_type) {
        case AVMEDIA_TYPE_SUBTITLE:
            // XSUB subtitles behave like video tracks, other subtitles
            // are not (yet) supported.
            if (stream->codec_id != CODEC_ID_XSUB) {
                av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
                return AVERROR_PATCHWELCOME;
            }
        case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break;
        case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break;
//      case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break;
        case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break;
        }
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
           stream->codec_id == CODEC_ID_XSUB)
            avio_wl32(pb, stream->codec_tag);
        else
            avio_wl32(pb, 1);
        avio_wl32(pb, 0); /* flags */
        avio_wl16(pb, 0); /* priority */
        avio_wl16(pb, 0); /* language */
        avio_wl32(pb, 0); /* initial frame */

        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);

        avio_wl32(pb, au_scale); /* scale */
        avio_wl32(pb, au_byterate); /* rate */
        avpriv_set_pts_info(s->streams[i], 64, au_scale, au_byterate);

        avio_wl32(pb, 0); /* start */
        avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */
        if (!pb->seekable)
            avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
        else
            avio_wl32(pb, 0); /* length, XXX: filled later */

        /* suggested buffer size */ //FIXME set at the end to largest chunk
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
            avio_wl32(pb, 1024 * 1024);
        else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
            avio_wl32(pb, 12 * 1024);
        else
            avio_wl32(pb, 0);
        avio_wl32(pb, -1); /* quality */
        avio_wl32(pb, au_ssize); /* sample size */
        avio_wl32(pb, 0);
        avio_wl16(pb, stream->width);
        avio_wl16(pb, stream->height);
        ff_end_tag(pb, strh);

      if(stream->codec_type != AVMEDIA_TYPE_DATA){
        strf = ff_start_tag(pb, "strf");
        switch(stream->codec_type) {
        case AVMEDIA_TYPE_SUBTITLE:
            // XSUB subtitles behave like video tracks, other subtitles
            // are not (yet) supported.
            if (stream->codec_id != CODEC_ID_XSUB) break;
        case AVMEDIA_TYPE_VIDEO:
            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
            break;
        case AVMEDIA_TYPE_AUDIO:
            if (ff_put_wav_header(pb, stream) < 0) {
                return -1;
            }
            break;
        default:
            return -1;
        }
        ff_end_tag(pb, strf);
        if ((t = av_dict_get(s->streams[i]->metadata, "title", NULL, 0))) {
            avi_write_info_tag(s->pb, "strn", t->value);
            t = NULL;
        }
      }

        if (pb->seekable) {
            unsigned char tag[5];
            int j;

            /* Starting to lay out AVI OpenDML master index.
             * We want to make it JUNK entry for now, since we'd
             * like to get away without making AVI an OpenDML one
             * for compatibility reasons.
             */
            avist->indexes.entry = avist->indexes.ents_allocated = 0;
            avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
            avio_wl16(pb, 4);        /* wLongsPerEntry */
            avio_w8(pb, 0);          /* bIndexSubType (0 == frame index) */
            avio_w8(pb, 0);          /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
            avio_wl32(pb, 0);        /* nEntriesInUse (will fill out later on) */
            ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type));
                                    /* dwChunkId */
            avio_wl64(pb, 0);        /* dwReserved[3]
            avio_wl32(pb, 0);           Must be 0.    */
            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
                 avio_wl64(pb, 0);
            ff_end_tag(pb, avist->indexes.indx_start);
        }

        if(   stream->codec_type == AVMEDIA_TYPE_VIDEO
           && s->streams[i]->sample_aspect_ratio.num>0
           && s->streams[i]->sample_aspect_ratio.den>0){
            int vprp= ff_start_tag(pb, "vprp");
            AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
                                      (AVRational){stream->width, stream->height});
            int num, den;
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);

            avio_wl32(pb, 0); //video format  = unknown
            avio_wl32(pb, 0); //video standard= unknown
            avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base)));
            avio_wl32(pb, stream->width );
            avio_wl32(pb, stream->height);
            avio_wl16(pb, den);
            avio_wl16(pb, num);
            avio_wl32(pb, stream->width );
            avio_wl32(pb, stream->height);
            avio_wl32(pb, 1); //progressive FIXME

            avio_wl32(pb, stream->height);
            avio_wl32(pb, stream->width );
            avio_wl32(pb, stream->height);
            avio_wl32(pb, stream->width );
            avio_wl32(pb, 0);
            avio_wl32(pb, 0);

            avio_wl32(pb, 0);
            avio_wl32(pb, 0);
            ff_end_tag(pb, vprp);
        }

        ff_end_tag(pb, list2);
    }

    if (pb->seekable) {
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
        avi->odml_list = ff_start_tag(pb, "JUNK");
        ffio_wfourcc(pb, "odml");
        ffio_wfourcc(pb, "dmlh");
        avio_wl32(pb, 248);
        for (i = 0; i < 248; i+= 4)
             avio_wl32(pb, 0);
        ff_end_tag(pb, avi->odml_list);
    }

    ff_end_tag(pb, list1);

    list2 = ff_start_tag(pb, "LIST");
    ffio_wfourcc(pb, "INFO");
    ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
    for (i = 0; *ff_riff_tags[i]; i++) {
        if ((t = av_dict_get(s->metadata, ff_riff_tags[i], NULL, AV_DICT_MATCH_CASE)))
            avi_write_info_tag(s->pb, t->key, t->value);
    }
    ff_end_tag(pb, list2);

    /* some padding for easier tag editing */
    list2 = ff_start_tag(pb, "JUNK");
    for (i = 0; i < 1016; i += 4)
        avio_wl32(pb, 0);
    ff_end_tag(pb, list2);

    avi->movi_list = ff_start_tag(pb, "LIST");
    ffio_wfourcc(pb, "movi");

    avio_flush(pb);

    return 0;
}
/* first is true if we read the frame header */
static int ffm_read_data(AVFormatContext *s,
                         uint8_t *buf, int size, int header)
{
    FFMContext *ffm = s->priv_data;
    AVIOContext *pb = s->pb;
    int len, fill_size, size1, frame_offset, id;

    size1 = size;
    while (size > 0) {
    redo:
        len = ffm->packet_end - ffm->packet_ptr;
        if (len < 0)
            return -1;
        if (len > size)
            len = size;
        if (len == 0) {
            if (avio_tell(pb) == ffm->file_size)
                avio_seek(pb, ffm->packet_size, SEEK_SET);
    retry_read:
            if (pb->buffer_size != ffm->packet_size) {
                int64_t tell = avio_tell(pb);
                ffio_set_buf_size(pb, ffm->packet_size);
                avio_seek(pb, tell, SEEK_SET);
            }
            id = avio_rb16(pb); /* PACKET_ID */
            if (id != PACKET_ID)
                if (ffm_resync(s, id) < 0)
                    return -1;
            fill_size = avio_rb16(pb);
            ffm->dts = avio_rb64(pb);
            frame_offset = avio_rb16(pb);
            avio_read(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
            ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
            if (ffm->packet_end < ffm->packet || frame_offset < 0)
                return -1;
            /* if first packet or resynchronization packet, we must
               handle it specifically */
            if (ffm->first_packet || (frame_offset & 0x8000)) {
                if (!frame_offset) {
                    /* This packet has no frame headers in it */
                    if (avio_tell(pb) >= ffm->packet_size * 3LL) {
                        avio_seek(pb, -ffm->packet_size * 2LL, SEEK_CUR);
                        goto retry_read;
                    }
                    /* This is bad, we cannot find a valid frame header */
                    return 0;
                }
                ffm->first_packet = 0;
                if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
                    return -1;
                ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
                if (!header)
                    break;
            } else {
                ffm->packet_ptr = ffm->packet;
            }
            goto redo;
        }
        memcpy(buf, ffm->packet_ptr, len);
        buf += len;
        ffm->packet_ptr += len;
        size -= len;
        header = 0;
    }
    return size1 - size;
}
Exemple #11
0
static int mpc_read_header(AVFormatContext *s)
{
    MPCContext *c = s->priv_data;
    AVStream *st;

    if(avio_rl24(s->pb) != MKTAG('M', 'P', '+', 0)){
        av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
        return AVERROR_INVALIDDATA;
    }
    c->ver = avio_r8(s->pb);
    if(c->ver != 0x07 && c->ver != 0x17){
        av_log(s, AV_LOG_ERROR, "Can demux Musepack SV7, got version %02X\n", c->ver);
        return AVERROR_INVALIDDATA;
    }
    c->fcount = avio_rl32(s->pb);
    if((int64_t)c->fcount * sizeof(MPCFrame) >= UINT_MAX){
        av_log(s, AV_LOG_ERROR, "Too many frames, seeking is not possible\n");
        return AVERROR_INVALIDDATA;
    }
    if(c->fcount){
        c->frames = av_malloc(c->fcount * sizeof(MPCFrame));
        if(!c->frames){
            av_log(s, AV_LOG_ERROR, "Cannot allocate seektable\n");
            return AVERROR(ENOMEM);
        }
    }else{
        av_log(s, AV_LOG_WARNING, "Container reports no frames\n");
    }
    c->curframe = 0;
    c->lastframe = -1;
    c->curbits = 8;
    c->frames_noted = 0;

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = AV_CODEC_ID_MUSEPACK7;
    st->codec->channels = 2;
    st->codec->bits_per_coded_sample = 16;

    st->codec->extradata_size = 16;
    st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
    avio_read(s->pb, st->codec->extradata, 16);
    st->codec->sample_rate = mpc_rate[st->codec->extradata[2] & 3];
    avpriv_set_pts_info(st, 32, MPC_FRAMESIZE, st->codec->sample_rate);
    /* scan for seekpoints */
    st->start_time = 0;
    st->duration = c->fcount;

    /* try to read APE tags */
    if (s->pb->seekable) {
        int64_t pos = avio_tell(s->pb);
        ff_ape_parse_tag(s);
        if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
            ff_id3v1_read(s);
        avio_seek(s->pb, pos, SEEK_SET);
    }

    return 0;
}
static int ffm_read_header(AVFormatContext *s)
{
    FFMContext *ffm = s->priv_data;
    AVStream *st;
    AVIOContext *pb = s->pb;
    AVCodecContext *codec;
    int i, nb_streams;
    uint32_t tag;

    /* header */
    tag = avio_rl32(pb);
    if (tag == MKTAG('F', 'F', 'M', '2'))
        return ffm2_read_header(s);
    if (tag != MKTAG('F', 'F', 'M', '1'))
        goto fail;
    ffm->packet_size = avio_rb32(pb);
    if (ffm->packet_size != FFM_PACKET_SIZE)
        goto fail;
    ffm->write_index = avio_rb64(pb);
    /* get also filesize */
    if (pb->seekable) {
        ffm->file_size = avio_size(pb);
        if (ffm->write_index && 0)
            adjust_write_index(s);
    } else {
        ffm->file_size = (UINT64_C(1) << 63) - 1;
    }

    nb_streams = avio_rb32(pb);
    avio_rb32(pb); /* total bitrate */
    /* read each stream */
    for(i=0;i<nb_streams;i++) {
        char rc_eq_buf[128];

        st = avformat_new_stream(s, NULL);
        if (!st)
            goto fail;

        avpriv_set_pts_info(st, 64, 1, 1000000);

        codec = st->codec;
        /* generic info */
        codec->codec_id = avio_rb32(pb);
        codec->codec_type = avio_r8(pb); /* codec_type */
        codec->bit_rate = avio_rb32(pb);
        codec->flags = avio_rb32(pb);
        codec->flags2 = avio_rb32(pb);
        codec->debug = avio_rb32(pb);
        /* specific info */
        switch(codec->codec_type) {
        case AVMEDIA_TYPE_VIDEO:
            codec->time_base.num = avio_rb32(pb);
            codec->time_base.den = avio_rb32(pb);
            codec->width = avio_rb16(pb);
            codec->height = avio_rb16(pb);
            codec->gop_size = avio_rb16(pb);
            codec->pix_fmt = avio_rb32(pb);
            codec->qmin = avio_r8(pb);
            codec->qmax = avio_r8(pb);
            codec->max_qdiff = avio_r8(pb);
            codec->qcompress = avio_rb16(pb) / 10000.0;
            codec->qblur = avio_rb16(pb) / 10000.0;
            codec->bit_rate_tolerance = avio_rb32(pb);
            avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
            codec->rc_eq = av_strdup(rc_eq_buf);
            codec->rc_max_rate = avio_rb32(pb);
            codec->rc_min_rate = avio_rb32(pb);
            codec->rc_buffer_size = avio_rb32(pb);
            codec->i_quant_factor = av_int2double(avio_rb64(pb));
            codec->b_quant_factor = av_int2double(avio_rb64(pb));
            codec->i_quant_offset = av_int2double(avio_rb64(pb));
            codec->b_quant_offset = av_int2double(avio_rb64(pb));
            codec->dct_algo = avio_rb32(pb);
            codec->strict_std_compliance = avio_rb32(pb);
            codec->max_b_frames = avio_rb32(pb);
            codec->mpeg_quant = avio_rb32(pb);
            codec->intra_dc_precision = avio_rb32(pb);
            codec->me_method = avio_rb32(pb);
            codec->mb_decision = avio_rb32(pb);
            codec->nsse_weight = avio_rb32(pb);
            codec->frame_skip_cmp = avio_rb32(pb);
            codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
            codec->codec_tag = avio_rb32(pb);
            codec->thread_count = avio_r8(pb);
            codec->coder_type = avio_rb32(pb);
            codec->me_cmp = avio_rb32(pb);
            codec->me_subpel_quality = avio_rb32(pb);
            codec->me_range = avio_rb32(pb);
            codec->keyint_min = avio_rb32(pb);
            codec->scenechange_threshold = avio_rb32(pb);
            codec->b_frame_strategy = avio_rb32(pb);
            codec->qcompress = av_int2double(avio_rb64(pb));
            codec->qblur = av_int2double(avio_rb64(pb));
            codec->max_qdiff = avio_rb32(pb);
            codec->refs = avio_rb32(pb);
            break;
        case AVMEDIA_TYPE_AUDIO:
            codec->sample_rate = avio_rb32(pb);
            codec->channels = avio_rl16(pb);
            codec->frame_size = avio_rl16(pb);
            break;
        default:
            goto fail;
        }
        if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
            if (ff_get_extradata(codec, pb, avio_rb32(pb)) < 0)
                return AVERROR(ENOMEM);
        }
    }

    /* get until end of block reached */
    while ((avio_tell(pb) % ffm->packet_size) != 0)
        avio_r8(pb);

    /* init packet demux */
    ffm->packet_ptr = ffm->packet;
    ffm->packet_end = ffm->packet;
    ffm->frame_offset = 0;
    ffm->dts = 0;
    ffm->read_state = READ_HEADER;
    ffm->first_packet = 1;
    return 0;
 fail:
    ffm_close(s);
    return -1;
}
static int ffm2_read_header(AVFormatContext *s)
{
    FFMContext *ffm = s->priv_data;
    AVStream *st;
    AVIOContext *pb = s->pb;
    AVCodecContext *codec;
    int ret;
    int f_main = 0, f_cprv, f_stvi, f_stau;
    AVCodec *enc;
    char *buffer;

    ffm->packet_size = avio_rb32(pb);
    if (ffm->packet_size != FFM_PACKET_SIZE) {
        av_log(s, AV_LOG_ERROR, "Invalid packet size %d, expected size was %d\n",
               ffm->packet_size, FFM_PACKET_SIZE);
        ret = AVERROR_INVALIDDATA;
        goto fail;
    }

    ffm->write_index = avio_rb64(pb);
    /* get also filesize */
    if (pb->seekable) {
        ffm->file_size = avio_size(pb);
        if (ffm->write_index && 0)
            adjust_write_index(s);
    } else {
        ffm->file_size = (UINT64_C(1) << 63) - 1;
    }

    while(!avio_feof(pb)) {
        unsigned id = avio_rb32(pb);
        unsigned size = avio_rb32(pb);
        int64_t next = avio_tell(pb) + size;
        char rc_eq_buf[128];

        if(!id)
            break;

        switch(id) {
        case MKBETAG('M', 'A', 'I', 'N'):
            if (f_main++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            avio_rb32(pb); /* nb_streams */
            avio_rb32(pb); /* total bitrate */
            break;
        case MKBETAG('C', 'O', 'M', 'M'):
            f_cprv = f_stvi = f_stau = 0;
            st = avformat_new_stream(s, NULL);
            if (!st) {
                ret = AVERROR(ENOMEM);
                goto fail;
            }

            avpriv_set_pts_info(st, 64, 1, 1000000);

            codec = st->codec;
            /* generic info */
            codec->codec_id = avio_rb32(pb);
            codec->codec_type = avio_r8(pb);
            codec->bit_rate = avio_rb32(pb);
            codec->flags = avio_rb32(pb);
            codec->flags2 = avio_rb32(pb);
            codec->debug = avio_rb32(pb);
            if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
                if (ff_get_extradata(codec, pb, avio_rb32(pb)) < 0)
                    return AVERROR(ENOMEM);
            }
            break;
        case MKBETAG('S', 'T', 'V', 'I'):
            if (f_stvi++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            codec->time_base.num = avio_rb32(pb);
            codec->time_base.den = avio_rb32(pb);
            codec->width = avio_rb16(pb);
            codec->height = avio_rb16(pb);
            codec->gop_size = avio_rb16(pb);
            codec->pix_fmt = avio_rb32(pb);
            codec->qmin = avio_r8(pb);
            codec->qmax = avio_r8(pb);
            codec->max_qdiff = avio_r8(pb);
            codec->qcompress = avio_rb16(pb) / 10000.0;
            codec->qblur = avio_rb16(pb) / 10000.0;
            codec->bit_rate_tolerance = avio_rb32(pb);
            avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
            codec->rc_eq = av_strdup(rc_eq_buf);
            codec->rc_max_rate = avio_rb32(pb);
            codec->rc_min_rate = avio_rb32(pb);
            codec->rc_buffer_size = avio_rb32(pb);
            codec->i_quant_factor = av_int2double(avio_rb64(pb));
            codec->b_quant_factor = av_int2double(avio_rb64(pb));
            codec->i_quant_offset = av_int2double(avio_rb64(pb));
            codec->b_quant_offset = av_int2double(avio_rb64(pb));
            codec->dct_algo = avio_rb32(pb);
            codec->strict_std_compliance = avio_rb32(pb);
            codec->max_b_frames = avio_rb32(pb);
            codec->mpeg_quant = avio_rb32(pb);
            codec->intra_dc_precision = avio_rb32(pb);
            codec->me_method = avio_rb32(pb);
            codec->mb_decision = avio_rb32(pb);
            codec->nsse_weight = avio_rb32(pb);
            codec->frame_skip_cmp = avio_rb32(pb);
            codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
            codec->codec_tag = avio_rb32(pb);
            codec->thread_count = avio_r8(pb);
            codec->coder_type = avio_rb32(pb);
            codec->me_cmp = avio_rb32(pb);
            codec->me_subpel_quality = avio_rb32(pb);
            codec->me_range = avio_rb32(pb);
            codec->keyint_min = avio_rb32(pb);
            codec->scenechange_threshold = avio_rb32(pb);
            codec->b_frame_strategy = avio_rb32(pb);
            codec->qcompress = av_int2double(avio_rb64(pb));
            codec->qblur = av_int2double(avio_rb64(pb));
            codec->max_qdiff = avio_rb32(pb);
            codec->refs = avio_rb32(pb);
            break;
        case MKBETAG('S', 'T', 'A', 'U'):
            if (f_stau++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            codec->sample_rate = avio_rb32(pb);
            codec->channels = avio_rl16(pb);
            codec->frame_size = avio_rl16(pb);
            break;
        case MKBETAG('C', 'P', 'R', 'V'):
            if (f_cprv++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            enc = avcodec_find_encoder(codec->codec_id);
            if (enc && enc->priv_data_size && enc->priv_class) {
                st->recommended_encoder_configuration = av_malloc(size + 1);
                if (!st->recommended_encoder_configuration) {
                    ret = AVERROR(ENOMEM);
                    goto fail;
                }
                avio_get_str(pb, size, st->recommended_encoder_configuration, size + 1);
            }
            break;
        case MKBETAG('S', '2', 'V', 'I'):
            if (f_stvi++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            buffer = av_malloc(size);
            if (!buffer) {
                ret = AVERROR(ENOMEM);
                goto fail;
            }
            avio_get_str(pb, INT_MAX, buffer, size);
            av_set_options_string(codec, buffer, "=", ",");
            av_freep(&buffer);
            break;
        case MKBETAG('S', '2', 'A', 'U'):
            if (f_stau++) {
                ret = AVERROR(EINVAL);
                goto fail;
            }
            buffer = av_malloc(size);
            if (!buffer) {
                ret = AVERROR(ENOMEM);
                goto fail;
            }
            avio_get_str(pb, INT_MAX, buffer, size);
            av_set_options_string(codec, buffer, "=", ",");
            av_freep(&buffer);
            break;
        }
        avio_seek(pb, next, SEEK_SET);
    }

    /* get until end of block reached */
    while ((avio_tell(pb) % ffm->packet_size) != 0)
        avio_r8(pb);

    /* init packet demux */
    ffm->packet_ptr = ffm->packet;
    ffm->packet_end = ffm->packet;
    ffm->frame_offset = 0;
    ffm->dts = 0;
    ffm->read_state = READ_HEADER;
    ffm->first_packet = 1;
    return 0;
 fail:
    ffm_close(s);
    return ret;
}
/* write the header (used two times if non streamed) */
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
{
    ASFContext *asf = (ASFContext *)s->priv_data;
    AVIOContext *pb = s->pb;
    AVDictionaryEntry *tags[5];
    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
    int has_title;
    int metadata_count;
    AVCodecContext *enc;
    int64_t header_offset, cur_pos, hpos;
    int bit_rate;
    int64_t duration;

    ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);

    tags[0] = av_dict_get(s->metadata, "title"    , NULL, 0);
    tags[1] = av_dict_get(s->metadata, "author"   , NULL, 0);
    tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
    tags[3] = av_dict_get(s->metadata, "comment"  , NULL, 0);
    tags[4] = av_dict_get(s->metadata, "rating"   , NULL, 0);

    duration = asf->duration + PREROLL_TIME * 10000;
    has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
    metadata_count = s->metadata ? s->metadata->count : 0;

    bit_rate = 0;
    for(n=0;n<s->nb_streams;n++) {
        enc = s->streams[n]->codec;

        avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */

        bit_rate += enc->bit_rate;
    }

    if (asf->is_streamed) {
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
    }

    ff_put_guid(pb, &ff_asf_header);
    avio_wl64(pb, -1); /* header length, will be patched after */
    avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
    avio_w8(pb, 1); /* ??? */
    avio_w8(pb, 2); /* ??? */

    /* file header */
    header_offset = avio_tell(pb);
    hpos = put_header(pb, &ff_asf_file_header);
    ff_put_guid(pb, &ff_asf_my_guid);
    avio_wl64(pb, file_size);
    file_time = 0;
    avio_wl64(pb, unix_to_file_time(file_time));
    avio_wl64(pb, asf->nb_packets); /* number of packets */
    avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
    avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
    avio_wl64(pb, PREROLL_TIME); /* start time stamp */
    avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */
    avio_wl32(pb, s->packet_size); /* packet size */
    avio_wl32(pb, s->packet_size); /* packet size */
    avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
    end_header(pb, hpos);

    /* unknown headers */
    hpos = put_header(pb, &ff_asf_head1_guid);
    ff_put_guid(pb, &ff_asf_head2_guid);
    avio_wl32(pb, 6);
    avio_wl16(pb, 0);
    end_header(pb, hpos);

    /* title and other infos */
    if (has_title) {
        int len;
        uint8_t *buf;
        AVIOContext *dyn_buf;

        if (avio_open_dyn_buf(&dyn_buf) < 0)
            return AVERROR(ENOMEM);

        hpos = put_header(pb, &ff_asf_comment_header);

        for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
            len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
            avio_wl16(pb, len);
        }
        len = avio_close_dyn_buf(dyn_buf, &buf);
        avio_write(pb, buf, len);
        av_freep(&buf);
        end_header(pb, hpos);
    }
    if (metadata_count) {
        AVDictionaryEntry *tag = NULL;
        hpos = put_header(pb, &ff_asf_extended_content_header);
        avio_wl16(pb, metadata_count);
        while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
            put_str16(pb, tag->key);
            avio_wl16(pb, 0);
            put_str16(pb, tag->value);
        }
        end_header(pb, hpos);
    }

    /* stream headers */
    for(n=0;n<s->nb_streams;n++) {
        int64_t es_pos;
        //        ASFStream *stream = &asf->streams[n];

        enc = s->streams[n]->codec;
        asf->streams[n].num = n + 1;
        asf->streams[n].seq = 0;


        switch(enc->codec_type) {
        case AVMEDIA_TYPE_AUDIO:
            wav_extra_size = 0;
            extra_size = 18 + wav_extra_size;
            extra_size2 = 8;
            break;
        default:
        case AVMEDIA_TYPE_VIDEO:
            wav_extra_size = enc->extradata_size;
            extra_size = 0x33 + wav_extra_size;
            extra_size2 = 0;
            break;
        }

        hpos = put_header(pb, &ff_asf_stream_header);
        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            ff_put_guid(pb, &ff_asf_audio_stream);
            ff_put_guid(pb, &ff_asf_audio_conceal_spread);
        } else {
            ff_put_guid(pb, &ff_asf_video_stream);
            ff_put_guid(pb, &ff_asf_video_conceal_none);
        }
        avio_wl64(pb, 0); /* ??? */
        es_pos = avio_tell(pb);
        avio_wl32(pb, extra_size); /* wav header len */
        avio_wl32(pb, extra_size2); /* additional data len */
        avio_wl16(pb, n + 1); /* stream number */
        avio_wl32(pb, 0); /* ??? */

        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            /* WAVEFORMATEX header */
            int wavsize = ff_put_wav_header(pb, enc);

            if (wavsize < 0)
                return -1;
            if (wavsize != extra_size) {
                cur_pos = avio_tell(pb);
                avio_seek(pb, es_pos, SEEK_SET);
                avio_wl32(pb, wavsize); /* wav header len */
                avio_seek(pb, cur_pos, SEEK_SET);
            }
            /* ERROR Correction */
            avio_w8(pb, 0x01);
            if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
                avio_wl16(pb, 0x0190);
                avio_wl16(pb, 0x0190);
            }else{
                avio_wl16(pb, enc->block_align);
                avio_wl16(pb, enc->block_align);
            }
            avio_wl16(pb, 0x01);
            avio_w8(pb, 0x00);
        } else {
            avio_wl32(pb, enc->width);
            avio_wl32(pb, enc->height);
            avio_w8(pb, 2); /* ??? */
            avio_wl16(pb, 40 + enc->extradata_size); /* size */

            /* BITMAPINFOHEADER header */
            ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1);
        }
        end_header(pb, hpos);
    }

    /* media comments */

    hpos = put_header(pb, &ff_asf_codec_comment_header);
    ff_put_guid(pb, &ff_asf_codec_comment1_header);
    avio_wl32(pb, s->nb_streams);
    for(n=0;n<s->nb_streams;n++) {
        AVCodec *p;
        const char *desc;
        int len;
        uint8_t *buf;
        AVIOContext *dyn_buf;

        enc = s->streams[n]->codec;
        p = avcodec_find_encoder(enc->codec_id);

        if(enc->codec_type == AVMEDIA_TYPE_AUDIO)
            avio_wl16(pb, 2);
        else if(enc->codec_type == AVMEDIA_TYPE_VIDEO)
            avio_wl16(pb, 1);
        else
            avio_wl16(pb, -1);

        if(enc->codec_id == CODEC_ID_WMAV2)
            desc = "Windows Media Audio V8";
        else
            desc = p ? p->name : enc->codec_name;

        if ( avio_open_dyn_buf(&dyn_buf) < 0)
            return AVERROR(ENOMEM);

        avio_put_str16le(dyn_buf, desc);
        len = avio_close_dyn_buf(dyn_buf, &buf);
        avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2

        avio_write(pb, buf, len);
        av_freep(&buf);

        avio_wl16(pb, 0); /* no parameters */


        /* id */
        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            avio_wl16(pb, 2);
            avio_wl16(pb, enc->codec_tag);
        } else {
            avio_wl16(pb, 4);
            avio_wl32(pb, enc->codec_tag);
        }
        if(!enc->codec_tag)
            return -1;
    }
    end_header(pb, hpos);

    /* patch the header size fields */

    cur_pos = avio_tell(pb);
    header_size = cur_pos - header_offset;
    if (asf->is_streamed) {
        header_size += 8 + 30 + 50;

        avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
        avio_wl16(pb, header_size);
        avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
        avio_wl16(pb, header_size);

        header_size -= 8 + 30 + 50;
    }
    header_size += 24 + 6;
    avio_seek(pb, header_offset - 14, SEEK_SET);
    avio_wl64(pb, header_size);
    avio_seek(pb, cur_pos, SEEK_SET);

    /* movie chunk, followed by packets of packet_size */
    asf->data_offset = cur_pos;
    ff_put_guid(pb, &ff_asf_data_header);
    avio_wl64(pb, data_chunk_size);
    ff_put_guid(pb, &ff_asf_my_guid);
    avio_wl64(pb, asf->nb_packets); /* nb packets */
    avio_w8(pb, 1); /* ??? */
    avio_w8(pb, 1); /* ??? */
    return 0;
}
Exemple #15
0
int64_t ff_text_pos(FFTextReader *r)
{
    return avio_tell(r->pb) - r->buf_len + r->buf_pos;
}
Exemple #16
0
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIContext *avi = s->priv_data;
    AVIOContext *pb = s->pb;
    unsigned char tag[5];
    unsigned int flags=0;
    const int stream_index= pkt->stream_index;
    AVIStream *avist= s->streams[stream_index]->priv_data;
    AVCodecContext *enc= s->streams[stream_index]->codec;
    int size= pkt->size;

//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
        AVPacket empty_packet;

        av_init_packet(&empty_packet);
        empty_packet.size= 0;
        empty_packet.data= NULL;
        empty_packet.stream_index= stream_index;
        avi_write_packet(s, &empty_packet);
//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
    }
    avist->packet_count++;

    // Make sure to put an OpenDML chunk when the file size exceeds the limits
    if (pb->seekable &&
        (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {

        avi_write_ix(s);
        ff_end_tag(pb, avi->movi_list);

        if (avi->riff_id == 1)
            avi_write_idx1(s);

        ff_end_tag(pb, avi->riff_start);
        avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
    }

    avi_stream2fourcc(tag, stream_index, enc->codec_type);
    if(pkt->flags&AV_PKT_FLAG_KEY)
        flags = 0x10;
    if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
       avist->audio_strm_length += size;
    }

    if (s->pb->seekable) {
        AVIIndex* idx = &avist->indexes;
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
        if (idx->ents_allocated <= idx->entry) {
            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
            if (!idx->cluster)
                return -1;
            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
            if (!idx->cluster[cl])
                return -1;
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
        }

        idx->cluster[cl][id].flags = flags;
        idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
        idx->cluster[cl][id].len = size;
        idx->entry++;
    }

    avio_write(pb, tag, 4);
    avio_wl32(pb, size);
    avio_write(pb, pkt->data, size);
    if (size & 1)
        avio_w8(pb, 0);

    avio_flush(pb);
    return 0;
}
static int fourxm_read_packet(AVFormatContext *s,
                              AVPacket *pkt)
{
    FourxmDemuxContext *fourxm = s->priv_data;
    AVIOContext *pb = s->pb;
    unsigned int fourcc_tag;
    unsigned int size;
    int ret = 0;
    unsigned int track_number;
    int packet_read = 0;
    unsigned char header[8];
    int audio_frame_count;

    while (!packet_read) {

        if ((ret = avio_read(s->pb, header, 8)) < 0)
            return ret;
        fourcc_tag = AV_RL32(&header[0]);
        size = AV_RL32(&header[4]);
        if (url_feof(pb))
            return AVERROR(EIO);
        switch (fourcc_tag) {

        case LIST_TAG:
            /* this is a good time to bump the video pts */
            fourxm->video_pts ++;

            /* skip the LIST-* tag and move on to the next fourcc */
            avio_rl32(pb);
            break;

        case ifrm_TAG:
        case pfrm_TAG:
        case cfrm_TAG:
        case ifr2_TAG:
        case pfr2_TAG:
        case cfr2_TAG:
            /* allocate 8 more bytes than 'size' to account for fourcc
             * and size */
            if (size + 8 < size || av_new_packet(pkt, size + 8))
                return AVERROR(EIO);
            pkt->stream_index = fourxm->video_stream_index;
            pkt->pts = fourxm->video_pts;
            pkt->pos = avio_tell(s->pb);
            memcpy(pkt->data, header, 8);
            ret = avio_read(s->pb, &pkt->data[8], size);

            if (ret < 0){
                av_free_packet(pkt);
            }else
                packet_read = 1;
            break;

        case snd__TAG:
            track_number = avio_rl32(pb);
            avio_skip(pb, 4);
            size-=8;

            if (track_number < fourxm->track_count && fourxm->tracks[track_number].channels>0) {
                ret= av_get_packet(s->pb, pkt, size);
                if(ret<0)
                    return AVERROR(EIO);
                pkt->stream_index =
                    fourxm->tracks[track_number].stream_index;
                pkt->pts = fourxm->tracks[track_number].audio_pts;
                packet_read = 1;

                /* pts accounting */
                audio_frame_count = size;
                if (fourxm->tracks[track_number].adpcm)
                    audio_frame_count -=
                        2 * (fourxm->tracks[track_number].channels);
                audio_frame_count /=
                      fourxm->tracks[track_number].channels;
                if (fourxm->tracks[track_number].adpcm){
                    audio_frame_count *= 2;
                }else
                    audio_frame_count /=
                    (fourxm->tracks[track_number].bits / 8);
                fourxm->tracks[track_number].audio_pts += audio_frame_count;

            } else {
                avio_skip(pb, size);
            }
            break;

        default:
            avio_skip(pb, size);
            break;
        }
    }
    return ret;
}
static int str_read_packet(AVFormatContext *s,
                           AVPacket *ret_pkt)
{
    AVIOContext *pb = s->pb;
    StrDemuxContext *str = s->priv_data;
    unsigned char sector[RAW_CD_SECTOR_SIZE];
    int channel;
    AVPacket *pkt;
    AVStream *st;

    while (1) {

        if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
            return AVERROR(EIO);

        channel = sector[0x11];
        if (channel >= 32)
            return AVERROR_INVALIDDATA;

        switch (sector[0x12] & CDXA_TYPE_MASK) {

        case CDXA_TYPE_DATA:
        case CDXA_TYPE_VIDEO:
            {

                int current_sector = AV_RL16(&sector[0x1C]);
                int sector_count   = AV_RL16(&sector[0x1E]);
                int frame_size = AV_RL32(&sector[0x24]);

                if(!(   frame_size>=0
                     && current_sector < sector_count
                     && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
                    av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
                    break;
                }

                if(str->channels[channel].video_stream_index < 0){
                    /* allocate a new AVStream */
                    st = avformat_new_stream(s, NULL);
                    if (!st)
                        return AVERROR(ENOMEM);
                    avpriv_set_pts_info(st, 64, 1, 15);

                    str->channels[channel].video_stream_index = st->index;

                    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
                    st->codec->codec_id   = AV_CODEC_ID_MDEC;
                    st->codec->codec_tag  = 0;  /* no fourcc */
                    st->codec->width      = AV_RL16(&sector[0x28]);
                    st->codec->height     = AV_RL16(&sector[0x2A]);
                }

                /* if this is the first sector of the frame, allocate a pkt */
                pkt = &str->channels[channel].tmp_pkt;

                if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
                    if(pkt->data)
                        av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
                    av_free_packet(pkt);
                    if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
                        return AVERROR(EIO);

                    pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
                    pkt->stream_index =
                        str->channels[channel].video_stream_index;
                }

                memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
                       sector + VIDEO_DATA_HEADER_SIZE,
                       VIDEO_DATA_CHUNK_SIZE);

                if (current_sector == sector_count-1) {
                    pkt->size= frame_size;
                    *ret_pkt = *pkt;
                    pkt->data= NULL;
                    pkt->size= -1;
                    pkt->buf = NULL;
#if FF_API_DESTRUCT_PACKET
//FF_DISABLE_DEPRECATION_WARNINGS
                    pkt->destruct = NULL;
//FF_ENABLE_DEPRECATION_WARNINGS
#endif
                    return 0;
                }

            }
            break;

        case CDXA_TYPE_AUDIO:
            if(str->channels[channel].audio_stream_index < 0){
                int fmt = sector[0x13];
                /* allocate a new AVStream */
                st = avformat_new_stream(s, NULL);
                if (!st)
                    return AVERROR(ENOMEM);

                str->channels[channel].audio_stream_index = st->index;

                st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
                st->codec->codec_id    = AV_CODEC_ID_ADPCM_XA;
                st->codec->codec_tag   = 0;  /* no fourcc */
                if (fmt & 1) {
                    st->codec->channels       = 2;
                    st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
                } else {
                    st->codec->channels       = 1;
                    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
                }
                st->codec->sample_rate = (fmt&4)?18900:37800;
            //    st->codec->bit_rate = 0; //FIXME;
                st->codec->block_align = 128;

                avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
                                    st->codec->sample_rate);
                st->start_time = 0;
            }
            pkt = ret_pkt;
            if (av_new_packet(pkt, 2304))
                return AVERROR(EIO);
            memcpy(pkt->data,sector+24,2304);

            pkt->stream_index =
                str->channels[channel].audio_stream_index;
            pkt->duration = 1;
            return 0;
        default:
            av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
            /* drop the sector and move on */
            break;
        }

        if (pb->eof_reached)
            return AVERROR(EIO);
    }
}
Exemple #19
0
static int flv_write_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    FLVContext *flv = s->priv_data;
    AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL;
    int i, metadata_count = 0;
    double framerate = 0.0;
    int64_t metadata_size_pos, data_size, metadata_count_pos;
    AVDictionaryEntry *tag = NULL;

    for (i = 0; i < s->nb_streams; i++) {
        AVCodecContext *enc = s->streams[i]->codec;
        FLVStreamContext *sc;
        switch (enc->codec_type) {
        case AVMEDIA_TYPE_VIDEO:
            if (s->streams[i]->avg_frame_rate.den &&
                s->streams[i]->avg_frame_rate.num) {
                framerate = av_q2d(s->streams[i]->avg_frame_rate);
            } else {
                framerate = 1 / av_q2d(s->streams[i]->codec->time_base);
            }
            if (video_enc) {
                av_log(s, AV_LOG_ERROR,
                       "at most one video stream is supported in flv\n");
                return AVERROR(EINVAL);
            }
            video_enc = enc;
            if (enc->codec_tag == 0) {
                av_log(s, AV_LOG_ERROR, "Video codec '%s' for stream %d is not compatible with FLV\n",
                       avcodec_get_name(enc->codec_id), i);
                return AVERROR(EINVAL);
            }
            break;
        case AVMEDIA_TYPE_AUDIO:
            if (audio_enc) {
                av_log(s, AV_LOG_ERROR,
                       "at most one audio stream is supported in flv\n");
                return AVERROR(EINVAL);
            }
            audio_enc = enc;
            if (get_audio_flags(s, enc) < 0)
                return AVERROR_INVALIDDATA;
            break;
        case AVMEDIA_TYPE_DATA:
            if (enc->codec_id != AV_CODEC_ID_TEXT) {
                av_log(s, AV_LOG_ERROR, "Data codec '%s' for stream %d is not compatible with FLV\n",
                       avcodec_get_name(enc->codec_id), i);
                return AVERROR_INVALIDDATA;
            }
            data_enc = enc;
            break;
        default:
            av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
                   av_get_media_type_string(enc->codec_type), i);
            return AVERROR(EINVAL);
        }
        avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */

        sc = av_mallocz(sizeof(FLVStreamContext));
        if (!sc)
            return AVERROR(ENOMEM);
        s->streams[i]->priv_data = sc;
        sc->last_ts = -1;
    }

    flv->delay = AV_NOPTS_VALUE;

    avio_write(pb, "FLV", 3);
    avio_w8(pb, 1);
    avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc +
                FLV_HEADER_FLAG_HASVIDEO * !!video_enc);
    avio_wb32(pb, 9);
    avio_wb32(pb, 0);

    for (i = 0; i < s->nb_streams; i++)
        if (s->streams[i]->codec->codec_tag == 5) {
            avio_w8(pb, 8);     // message type
            avio_wb24(pb, 0);   // include flags
            avio_wb24(pb, 0);   // time stamp
            avio_wb32(pb, 0);   // reserved
            avio_wb32(pb, 11);  // size
            flv->reserved = 5;
        }

    /* write meta_tag */
    avio_w8(pb, 18);            // tag type META
    metadata_size_pos = avio_tell(pb);
    avio_wb24(pb, 0);           // size of data part (sum of all parts below)
    avio_wb24(pb, 0);           // timestamp
    avio_wb32(pb, 0);           // reserved

    /* now data of data_size size */

    /* first event name as a string */
    avio_w8(pb, AMF_DATA_TYPE_STRING);
    put_amf_string(pb, "onMetaData"); // 12 bytes

    /* mixed array (hash) with size and string/type/data tuples */
    avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
    metadata_count_pos = avio_tell(pb);
    metadata_count = 5 * !!video_enc +
                     5 * !!audio_enc +
                     1 * !!data_enc  +
                     2; // +2 for duration and file size

    avio_wb32(pb, metadata_count);

    put_amf_string(pb, "duration");
    flv->duration_offset= avio_tell(pb);

    // fill in the guessed duration, it'll be corrected later if incorrect
    put_amf_double(pb, s->duration / AV_TIME_BASE);

    if (video_enc) {
        put_amf_string(pb, "width");
        put_amf_double(pb, video_enc->width);

        put_amf_string(pb, "height");
        put_amf_double(pb, video_enc->height);

        put_amf_string(pb, "videodatarate");
        put_amf_double(pb, video_enc->bit_rate / 1024.0);

        put_amf_string(pb, "framerate");
        put_amf_double(pb, framerate);

        put_amf_string(pb, "videocodecid");
        put_amf_double(pb, video_enc->codec_tag);
    }

    if (audio_enc) {
        put_amf_string(pb, "audiodatarate");
        put_amf_double(pb, audio_enc->bit_rate / 1024.0);

        put_amf_string(pb, "audiosamplerate");
        put_amf_double(pb, audio_enc->sample_rate);

        put_amf_string(pb, "audiosamplesize");
        put_amf_double(pb, audio_enc->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);

        put_amf_string(pb, "stereo");
        put_amf_bool(pb, audio_enc->channels == 2);

        put_amf_string(pb, "audiocodecid");
        put_amf_double(pb, audio_enc->codec_tag);
    }

    if (data_enc) {
        put_amf_string(pb, "datastream");
        put_amf_double(pb, 0.0);
    }

    while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
        if(   !strcmp(tag->key, "width")
            ||!strcmp(tag->key, "height")
            ||!strcmp(tag->key, "videodatarate")
            ||!strcmp(tag->key, "framerate")
            ||!strcmp(tag->key, "videocodecid")
            ||!strcmp(tag->key, "audiodatarate")
            ||!strcmp(tag->key, "audiosamplerate")
            ||!strcmp(tag->key, "audiosamplesize")
            ||!strcmp(tag->key, "stereo")
            ||!strcmp(tag->key, "audiocodecid")
            ||!strcmp(tag->key, "duration")
            ||!strcmp(tag->key, "onMetaData")
        ){
            av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
            continue;
        }
        put_amf_string(pb, tag->key);
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, tag->value);
        metadata_count++;
    }

    put_amf_string(pb, "filesize");
    flv->filesize_offset = avio_tell(pb);
    put_amf_double(pb, 0); // delayed write

    put_amf_string(pb, "");
    avio_w8(pb, AMF_END_OF_OBJECT);

    /* write total size of tag */
    data_size = avio_tell(pb) - metadata_size_pos - 10;

    avio_seek(pb, metadata_count_pos, SEEK_SET);
    avio_wb32(pb, metadata_count);

    avio_seek(pb, metadata_size_pos, SEEK_SET);
    avio_wb24(pb, data_size);
    avio_skip(pb, data_size + 10 - 3);
    avio_wb32(pb, data_size + 11);

    for (i = 0; i < s->nb_streams; i++) {
        AVCodecContext *enc = s->streams[i]->codec;
        if (enc->codec_id == AV_CODEC_ID_AAC || enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) {
            int64_t pos;
            avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ?
                    FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
            avio_wb24(pb, 0); // size patched later
            avio_wb24(pb, 0); // ts
            avio_w8(pb, 0);   // ts ext
            avio_wb24(pb, 0); // streamid
            pos = avio_tell(pb);
            if (enc->codec_id == AV_CODEC_ID_AAC) {
                avio_w8(pb, get_audio_flags(s, enc));
                avio_w8(pb, 0); // AAC sequence header
                avio_write(pb, enc->extradata, enc->extradata_size);
            } else {
                avio_w8(pb, enc->codec_tag | FLV_FRAME_KEY); // flags
                avio_w8(pb, 0); // AVC sequence header
                avio_wb24(pb, 0); // composition time
                ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size);
            }
            data_size = avio_tell(pb) - pos;
            avio_seek(pb, -data_size - 10, SEEK_CUR);
            avio_wb24(pb, data_size);
            avio_skip(pb, data_size + 10 - 3);
            avio_wb32(pb, data_size + 11); // previous tag size
        }
    }

    return 0;
}
Exemple #20
0
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIOContext *pb      = s->pb;
    AVCodecContext *enc  = s->streams[pkt->stream_index]->codec;
    FLVContext *flv      = s->priv_data;
    FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
    unsigned ts;
    int size = pkt->size;
    uint8_t *data = NULL;
    int flags = 0, flags_size;

    if (enc->codec_id == AV_CODEC_ID_VP6 || enc->codec_id == AV_CODEC_ID_VP6F ||
        enc->codec_id == AV_CODEC_ID_AAC)
        flags_size = 2;
    else if (enc->codec_id == AV_CODEC_ID_H264)
        flags_size = 5;
    else
        flags_size = 1;

    switch (enc->codec_type) {
    case AVMEDIA_TYPE_VIDEO:
        avio_w8(pb, FLV_TAG_TYPE_VIDEO);

        flags = enc->codec_tag;
        if (flags == 0) {
            av_log(s, AV_LOG_ERROR,
                   "video codec %X not compatible with flv\n",
                   enc->codec_id);
            return -1;
        }

        flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
        break;
    case AVMEDIA_TYPE_AUDIO:
        flags = get_audio_flags(s, enc);

        assert(size);

        avio_w8(pb, FLV_TAG_TYPE_AUDIO);
        break;
    case AVMEDIA_TYPE_DATA:
        avio_w8(pb, FLV_TAG_TYPE_META);
        break;
    default:
        return AVERROR(EINVAL);
    }

    if (enc->codec_id == AV_CODEC_ID_H264)
        /* check if extradata looks like MP4 */
        if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1)
            if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0)
                return -1;

    if (flv->delay == AV_NOPTS_VALUE)
        flv->delay = -pkt->dts;

    if (pkt->dts < -flv->delay) {
        av_log(s, AV_LOG_WARNING,
               "Packets are not in the proper order with respect to DTS\n");
        return AVERROR(EINVAL);
    }

    ts = pkt->dts + flv->delay; // add delay to force positive dts

    /* check Speex packet duration */
    if (enc->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
        av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
                                  "8 frames per packet. Adobe Flash "
                                  "Player cannot handle this!\n");

    if (sc->last_ts < ts)
        sc->last_ts = ts;

    avio_wb24(pb, size + flags_size);
    avio_wb24(pb, ts);
    avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
    avio_wb24(pb, flv->reserved);

    if (enc->codec_type == AVMEDIA_TYPE_DATA) {
        int data_size;
        int metadata_size_pos = avio_tell(pb);
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "onTextData");
        avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
        avio_wb32(pb, 2);
        put_amf_string(pb, "type");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "Text");
        put_amf_string(pb, "text");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, pkt->data);
        put_amf_string(pb, "");
        avio_w8(pb, AMF_END_OF_OBJECT);
        /* write total size of tag */
        data_size = avio_tell(pb) - metadata_size_pos;
        avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
        avio_wb24(pb, data_size);
        avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
        avio_wb32(pb, data_size + 11);
    } else {
        avio_w8(pb,flags);
        if (enc->codec_id == AV_CODEC_ID_VP6)
            avio_w8(pb, 0);
        if (enc->codec_id == AV_CODEC_ID_VP6F)
            avio_w8(pb, enc->extradata_size ? enc->extradata[0] : 0);
        else if (enc->codec_id == AV_CODEC_ID_AAC)
            avio_w8(pb, 1); // AAC raw
        else if (enc->codec_id == AV_CODEC_ID_H264) {
            avio_w8(pb, 1); // AVC NALU
            avio_wb24(pb, pkt->pts - pkt->dts);
        }

        avio_write(pb, data ? data : pkt->data, size);

        avio_wb32(pb, size + flags_size + 11); // previous tag size
        flv->duration = FFMAX(flv->duration,
                              pkt->pts + flv->delay + pkt->duration);
    }

    avio_flush(pb);
    av_free(data);

    return pb->error;
}
static int ffm_write_header(AVFormatContext *s)
{
    FFMContext *ffm = s->priv_data;
    AVStream *st;
    AVIOContext *pb = s->pb;
    AVCodecContext *codec;
    int bit_rate, i;

    ffm->packet_size = FFM_PACKET_SIZE;

    /* header */
    avio_wl32(pb, MKTAG('F', 'F', 'M', '1'));
    avio_wb32(pb, ffm->packet_size);
    avio_wb64(pb, 0); /* current write position */

    avio_wb32(pb, s->nb_streams);
    bit_rate = 0;
    for(i=0;i<s->nb_streams;i++) {
        st = s->streams[i];
        bit_rate += st->codec->bit_rate;
    }
    avio_wb32(pb, bit_rate);

    /* list of streams */
    for(i=0;i<s->nb_streams;i++) {
        st = s->streams[i];
        av_set_pts_info(st, 64, 1, 1000000);

        codec = st->codec;
        /* generic info */
        avio_wb32(pb, codec->codec_id);
        avio_w8(pb, codec->codec_type);
        avio_wb32(pb, codec->bit_rate);
        avio_wb32(pb, codec->flags);
        avio_wb32(pb, codec->flags2);
        avio_wb32(pb, codec->debug);
        /* specific info */
        switch(codec->codec_type) {
        case AVMEDIA_TYPE_VIDEO:
            avio_wb32(pb, codec->time_base.num);
            avio_wb32(pb, codec->time_base.den);
            avio_wb16(pb, codec->width);
            avio_wb16(pb, codec->height);
            avio_wb16(pb, codec->gop_size);
            avio_wb32(pb, codec->pix_fmt);
            avio_w8(pb, codec->qmin);
            avio_w8(pb, codec->qmax);
            avio_w8(pb, codec->max_qdiff);
            avio_wb16(pb, (int) (codec->qcompress * 10000.0));
            avio_wb16(pb, (int) (codec->qblur * 10000.0));
            avio_wb32(pb, codec->bit_rate_tolerance);
            avio_put_str(pb, codec->rc_eq ? codec->rc_eq : "tex^qComp");
            avio_wb32(pb, codec->rc_max_rate);
            avio_wb32(pb, codec->rc_min_rate);
            avio_wb32(pb, codec->rc_buffer_size);
            avio_wb64(pb, av_dbl2int(codec->i_quant_factor));
            avio_wb64(pb, av_dbl2int(codec->b_quant_factor));
            avio_wb64(pb, av_dbl2int(codec->i_quant_offset));
            avio_wb64(pb, av_dbl2int(codec->b_quant_offset));
            avio_wb32(pb, codec->dct_algo);
            avio_wb32(pb, codec->strict_std_compliance);
            avio_wb32(pb, codec->max_b_frames);
            avio_wb32(pb, codec->luma_elim_threshold);
            avio_wb32(pb, codec->chroma_elim_threshold);
            avio_wb32(pb, codec->mpeg_quant);
            avio_wb32(pb, codec->intra_dc_precision);
            avio_wb32(pb, codec->me_method);
            avio_wb32(pb, codec->mb_decision);
            avio_wb32(pb, codec->nsse_weight);
            avio_wb32(pb, codec->frame_skip_cmp);
            avio_wb64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
            avio_wb32(pb, codec->codec_tag);
            avio_w8(pb, codec->thread_count);
            avio_wb32(pb, codec->coder_type);
            avio_wb32(pb, codec->me_cmp);
            avio_wb32(pb, codec->me_subpel_quality);
            avio_wb32(pb, codec->me_range);
            avio_wb32(pb, codec->keyint_min);
            avio_wb32(pb, codec->scenechange_threshold);
            avio_wb32(pb, codec->b_frame_strategy);
            avio_wb64(pb, av_dbl2int(codec->qcompress));
            avio_wb64(pb, av_dbl2int(codec->qblur));
            avio_wb32(pb, codec->max_qdiff);
            avio_wb32(pb, codec->refs);
            break;
        case AVMEDIA_TYPE_AUDIO:
            avio_wb32(pb, codec->sample_rate);
            avio_wl16(pb, codec->channels);
            avio_wl16(pb, codec->frame_size);
            avio_wl16(pb, codec->sample_fmt);
            break;
        default:
            return -1;
        }
        if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
            avio_wb32(pb, codec->extradata_size);
            avio_write(pb, codec->extradata, codec->extradata_size);
        }
    }

    /* flush until end of block reached */
    while ((avio_tell(pb) % ffm->packet_size) != 0)
        avio_w8(pb, 0);

    avio_flush(pb);

    /* init packet mux */
    ffm->packet_ptr = ffm->packet;
    ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
    assert(ffm->packet_end >= ffm->packet);
    ffm->frame_offset = 0;
    ffm->dts = 0;
    ffm->first_packet = 1;

    return 0;
}
Exemple #22
0
static int pmp_header(AVFormatContext *s, AVFormatParameters *ap) {
    PMPContext *pmp = s->priv_data;
    AVIOContext *pb = s->pb;
    int tb_num, tb_den;
    int index_cnt;
    int audio_codec_id = CODEC_ID_NONE;
    int srate, channels;
    int i;
    uint64_t pos;
    AVStream *vst = av_new_stream(s, 0);
    if (!vst)
        return AVERROR(ENOMEM);
    vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    avio_skip(pb, 8);
    switch (avio_rl32(pb)) {
    case 0:
        vst->codec->codec_id = CODEC_ID_MPEG4;
        break;
    case 1:
        vst->codec->codec_id = CODEC_ID_H264;
        break;
    default:
        av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
        break;
    }
    index_cnt = avio_rl32(pb);
    vst->codec->width  = avio_rl32(pb);
    vst->codec->height = avio_rl32(pb);

    tb_num = avio_rl32(pb);
    tb_den = avio_rl32(pb);
    av_set_pts_info(vst, 32, tb_num, tb_den);
    vst->nb_frames = index_cnt;
    vst->duration = index_cnt;

    switch (avio_rl32(pb)) {
    case 0:
        audio_codec_id = CODEC_ID_MP3;
        break;
    case 1:
        av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n");
        audio_codec_id = CODEC_ID_AAC;
        break;
    default:
        av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
        break;
    }
    pmp->num_streams = avio_rl16(pb) + 1;
    avio_skip(pb, 10);
    srate = avio_rl32(pb);
    channels = avio_rl32(pb) + 1;
    for (i = 1; i < pmp->num_streams; i++) {
        AVStream *ast = av_new_stream(s, i);
        if (!ast)
            return AVERROR(ENOMEM);
        ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
        ast->codec->codec_id = audio_codec_id;
        ast->codec->channels = channels;
        ast->codec->sample_rate = srate;
        av_set_pts_info(ast, 32, 1, srate);
    }
    pos = avio_tell(pb) + 4*index_cnt;
    for (i = 0; i < index_cnt; i++) {
        int size = avio_rl32(pb);
        int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
        size >>= 1;
        av_add_index_entry(vst, pos, i, size, 0, flags);
        pos += size;
    }
    return 0;
}
Exemple #23
0
static int aiff_write_header(AVFormatContext *s)
{
    AIFFOutputContext *aiff = s->priv_data;
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;
    uint64_t sample_rate;
    int aifc = 0;

    /* First verify if format is ok */
    if (!enc->codec_tag)
        return -1;
    if (enc->codec_tag != MKTAG('N','O','N','E'))
        aifc = 1;

    /* FORM AIFF header */
    ffio_wfourcc(pb, "FORM");
    aiff->form = avio_tell(pb);
    avio_wb32(pb, 0);                    /* file length */
    ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");

    if (aifc) { // compressed audio
        enc->bits_per_coded_sample = 16;
        if (!enc->block_align) {
            av_log(s, AV_LOG_ERROR, "block align not set\n");
            return -1;
        }
        /* Version chunk */
        ffio_wfourcc(pb, "FVER");
        avio_wb32(pb, 4);
        avio_wb32(pb, 0xA2805140);
    }

    if (enc->channels > 2 && enc->channel_layout) {
        ffio_wfourcc(pb, "CHAN");
        avio_wb32(pb, 12);
        ff_mov_write_chan(pb, enc->channel_layout);
    }

    /* Common chunk */
    ffio_wfourcc(pb, "COMM");
    avio_wb32(pb, aifc ? 24 : 18); /* size */
    avio_wb16(pb, enc->channels);  /* Number of channels */

    aiff->frames = avio_tell(pb);
    avio_wb32(pb, 0);              /* Number of frames */

    if (!enc->bits_per_coded_sample)
        enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
    if (!enc->bits_per_coded_sample) {
        av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
        return -1;
    }
    if (!enc->block_align)
        enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;

    avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */

    sample_rate = av_double2int(enc->sample_rate);
    avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
    avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);

    if (aifc) {
        avio_wl32(pb, enc->codec_tag);
        avio_wb16(pb, 0);
    }

    if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
        ffio_wfourcc(pb, "wave");
        avio_wb32(pb, enc->extradata_size);
        avio_write(pb, enc->extradata, enc->extradata_size);
    }

    /* Sound data chunk */
    ffio_wfourcc(pb, "SSND");
    aiff->ssnd = avio_tell(pb);         /* Sound chunk size */
    avio_wb32(pb, 0);                    /* Sound samples data size */
    avio_wb32(pb, 0);                    /* Data offset */
    avio_wb32(pb, 0);                    /* Block-size (block align) */

    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);

    /* Data is starting here */
    avio_flush(pb);

    return 0;
}
static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
{
    int i;
    for (i = 0; i < nb_sectors; i++) {
        avio_wl32(pb, start_sector + (i << shift));
    }
    // pad left sector pointer size
    write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
}

static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
{
    int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
    int shift = sector_bits - WTV_SECTOR_BITS;

    int64_t fat = avio_tell(s->pb);
    write_fat(s->pb, start_sector, nb_sectors, shift);

    if (depth == 2) {
        int64_t start_sector1 = fat >> WTV_SECTOR_BITS;
        int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE;
        int64_t fat1 = avio_tell(s->pb);

       write_fat(s->pb, start_sector1, nb_sectors1, 0);
       return fat1;
    }

    return fat;
}

static void write_table_entries_events(AVFormatContext *s)
Exemple #25
0
static int swf_write_header(AVFormatContext *s)
{
    SWFContext *swf = s->priv_data;
    AVIOContext *pb = s->pb;
    PutBitContext p;
    uint8_t buf1[256];
    int i, width, height, rate, rate_base;
    int version;

    swf->sound_samples = 0;
    swf->swf_frame_number = 0;
    swf->video_frame_number = 0;

    for(i=0;i<s->nb_streams;i++) {
        AVCodecContext *enc = s->streams[i]->codec;
        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            if (enc->codec_id == CODEC_ID_MP3) {
                if (!enc->frame_size) {
                    av_log(s, AV_LOG_ERROR, "audio frame size not set\n");
                    return -1;
                }
                swf->audio_enc = enc;
                swf->audio_fifo= av_fifo_alloc(AUDIO_FIFO_SIZE);
                if (!swf->audio_fifo)
                    return AVERROR(ENOMEM);
            } else {
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n");
                return -1;
            }
        } else {
            if (enc->codec_id == CODEC_ID_VP6F ||
                enc->codec_id == CODEC_ID_FLV1 ||
                enc->codec_id == CODEC_ID_MJPEG) {
                swf->video_enc = enc;
            } else {
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n");
                return -1;
            }
        }
    }

    if (!swf->video_enc) {
        /* currently, cannot work correctly if audio only */
        width = 320;
        height = 200;
        rate = 10;
        rate_base= 1;
    } else {
        width = swf->video_enc->width;
        height = swf->video_enc->height;
        rate = swf->video_enc->time_base.den;
        rate_base = swf->video_enc->time_base.num;
    }

    if (!swf->audio_enc)
        swf->samples_per_frame = (44100. * rate_base) / rate;
    else
        swf->samples_per_frame = (swf->audio_enc->sample_rate * rate_base) / rate;

    avio_write(pb, "FWS", 3);

    if (!strcmp("avm2", s->oformat->name))
        version = 9;
    else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_VP6F)
        version = 8; /* version 8 and above support VP6 codec */
    else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_FLV1)
        version = 6; /* version 6 and above support FLV1 codec */
    else
        version = 4; /* version 4 for mpeg audio support */
    avio_w8(pb, version);

    avio_wl32(pb, DUMMY_FILE_SIZE); /* dummy size
                                      (will be patched if not streamed) */

    put_swf_rect(pb, 0, width * 20, 0, height * 20);
    avio_wl16(pb, (rate * 256) / rate_base); /* frame rate */
    swf->duration_pos = avio_tell(pb);
    avio_wl16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */

    /* avm2/swf v9 (also v8?) files require a file attribute tag */
    if (version == 9) {
        put_swf_tag(s, TAG_FILEATTRIBUTES);
        avio_wl32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */
        put_swf_end_tag(s);
    }

    /* define a shape with the jpeg inside */
    if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_MJPEG) {
        put_swf_tag(s, TAG_DEFINESHAPE);

        avio_wl16(pb, SHAPE_ID); /* ID of shape */
        /* bounding rectangle */
        put_swf_rect(pb, 0, width, 0, height);
        /* style info */
        avio_w8(pb, 1); /* one fill style */
        avio_w8(pb, 0x41); /* clipped bitmap fill */
        avio_wl16(pb, BITMAP_ID); /* bitmap ID */
        /* position of the bitmap */
        put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0,
                       0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0);
        avio_w8(pb, 0); /* no line style */

        /* shape drawing */
        init_put_bits(&p, buf1, sizeof(buf1));
        put_bits(&p, 4, 1); /* one fill bit */
        put_bits(&p, 4, 0); /* zero line bit */

        put_bits(&p, 1, 0); /* not an edge */
        put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0);
        put_bits(&p, 5, 1); /* nbits */
        put_bits(&p, 1, 0); /* X */
        put_bits(&p, 1, 0); /* Y */
        put_bits(&p, 1, 1); /* set fill style 1 */

        /* draw the rectangle ! */
        put_swf_line_edge(&p, width, 0);
        put_swf_line_edge(&p, 0, height);
        put_swf_line_edge(&p, -width, 0);
        put_swf_line_edge(&p, 0, -height);

        /* end of shape */
        put_bits(&p, 1, 0); /* not an edge */
        put_bits(&p, 5, 0);

        flush_put_bits(&p);
        avio_write(pb, buf1, put_bits_ptr(&p) - p.buf);

        put_swf_end_tag(s);
    }

    if (swf->audio_enc && swf->audio_enc->codec_id == CODEC_ID_MP3) {
        int v = 0;

        /* start sound */
        put_swf_tag(s, TAG_STREAMHEAD2);
        switch(swf->audio_enc->sample_rate) {
        case 11025: v |= 1 << 2; break;
        case 22050: v |= 2 << 2; break;
        case 44100: v |= 3 << 2; break;
        default:
            /* not supported */
            av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
            return -1;
        }
        v |= 0x02; /* 16 bit playback */
        if (swf->audio_enc->channels == 2)
            v |= 0x01; /* stereo playback */
        avio_w8(s->pb, v);
        v |= 0x20; /* mp3 compressed */
        avio_w8(s->pb, v);
        avio_wl16(s->pb, swf->samples_per_frame);  /* avg samples per frame */
        avio_wl16(s->pb, 0);

        put_swf_end_tag(s);
    }

    avio_flush(s->pb);
    return 0;
}
static int write_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    WtvContext *wctx = s->priv_data;
    int i, pad, ret;
    AVStream *st;

    wctx->last_chunk_pos     = -1;
    wctx->last_timestamp_pos = -1;

    ff_put_guid(pb, &ff_wtv_guid);
    ff_put_guid(pb, &sub_wtv_guid);

    avio_wl32(pb, 0x01);
    avio_wl32(pb, 0x02);
    avio_wl32(pb, 1 << WTV_SECTOR_BITS);
    avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);

    //write initial root fields
    avio_wl32(pb, 0); // root_size, update later
    write_pad(pb, 4);
    avio_wl32(pb, 0); // root_sector, update it later.

    write_pad(pb, 32);
    avio_wl32(pb, 0); // file ends pointer, update it later.

    pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
    write_pad(pb, pad);

    wctx->timeline_start_pos = avio_tell(pb);

    wctx->serial = 1;
    wctx->last_chunk_pos = -1;
    wctx->first_video_flag = 1;

    for (i = 0; i < s->nb_streams; i++) {
        st = s->streams[i];
        if (st->codec->codec_id == AV_CODEC_ID_MJPEG)
            continue;
        ret = write_stream_codec(s, st);
        if (ret < 0) {
            av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codec->codec_type);
            return -1;
        }
        if (!i)
            write_sync(s);
    }

    for (i = 0; i < s->nb_streams; i++) {
        st = s->streams[i];
        if (st->codec->codec_id == AV_CODEC_ID_MJPEG)
            continue;
        ret  = write_stream_data(s, st);
        if (ret < 0) {
            av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codec->codec_type);
            return -1;
        }
    }

    if (wctx->nb_index)
        write_index(s);

    return 0;
}
Exemple #27
0
static int read_header(AVFormatContext *s)
{
    BRSTMDemuxContext *b = s->priv_data;
    int bom, major, minor, codec, chunk;
    int64_t h1offset, pos, toffset;
    uint32_t size, asize, start = 0;
    AVStream *st;
    int ret = AVERROR_EOF;
    int loop = 0;
    int bfstm = !strcmp("bfstm", s->iformat->name);

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

    avio_skip(s->pb, 4);

    bom = avio_rb16(s->pb);
    if (bom != 0xFEFF && bom != 0xFFFE) {
        av_log(s, AV_LOG_ERROR, "invalid byte order: %X\n", bom);
        return AVERROR_INVALIDDATA;
    }

    if (bom == 0xFFFE)
        b->little_endian = 1;

    if (!bfstm) {
        major = avio_r8(s->pb);
        minor = avio_r8(s->pb);
        avio_skip(s->pb, 4); // size of file
        size = read16(s);
        if (size < 14)
            return AVERROR_INVALIDDATA;

        avio_skip(s->pb, size - 14);
        pos = avio_tell(s->pb);
        if (avio_rl32(s->pb) != MKTAG('H','E','A','D'))
            return AVERROR_INVALIDDATA;
    } else {
        uint32_t info_offset = 0;
        uint16_t section_count, header_size, i;

        header_size = read16(s); // 6

        avio_skip(s->pb, 4); // Unknown constant 0x00030000
        avio_skip(s->pb, 4); // size of file
        section_count = read16(s);
        avio_skip(s->pb, 2); // padding
        for (i = 0; avio_tell(s->pb) < header_size
                    && !(start && info_offset)
                    && i < section_count; i++) {
            uint16_t flag = read16(s);
            avio_skip(s->pb, 2);
            switch (flag) {
            case 0x4000:
                info_offset = read32(s);
                /*info_size =*/ read32(s);
                break;
            case 0x4001:
                avio_skip(s->pb, 4); // seek offset
                avio_skip(s->pb, 4); // seek size
                break;
            case 0x4002:
                start = read32(s) + 8;
                avio_skip(s->pb, 4); //data_size = read32(s);
                break;
            case 0x4003:
                avio_skip(s->pb, 4); // REGN offset
                avio_skip(s->pb, 4); // REGN size
                break;
            }
        }

        if (!info_offset || !start)
            return AVERROR_INVALIDDATA;

        avio_skip(s->pb, info_offset - avio_tell(s->pb));
        pos = avio_tell(s->pb);
        if (avio_rl32(s->pb) != MKTAG('I','N','F','O'))
            return AVERROR_INVALIDDATA;
    }

    size = read32(s);
    if (size < 192)
        return AVERROR_INVALIDDATA;
    avio_skip(s->pb, 4); // unknown
    h1offset = read32(s);
    if (h1offset > size)
        return AVERROR_INVALIDDATA;
    avio_skip(s->pb, 12);
    toffset = read32(s) + 16LL;
    if (toffset > size)
        return AVERROR_INVALIDDATA;

    avio_skip(s->pb, pos + h1offset + 8 - avio_tell(s->pb));
    codec = avio_r8(s->pb);

    switch (codec) {
    case 0: codec = AV_CODEC_ID_PCM_S8_PLANAR;    break;
    case 1: codec = b->little_endian ?
                    AV_CODEC_ID_PCM_S16LE_PLANAR :
                    AV_CODEC_ID_PCM_S16BE_PLANAR; break;
    case 2: codec = b->little_endian ?
                    AV_CODEC_ID_ADPCM_THP_LE :
                    AV_CODEC_ID_ADPCM_THP;        break;
    default:
        avpriv_request_sample(s, "codec %d", codec);
        return AVERROR_PATCHWELCOME;
    }

    loop = avio_r8(s->pb); // loop flag
    st->codec->codec_id = codec;
    st->codec->channels = avio_r8(s->pb);
    if (!st->codec->channels)
        return AVERROR_INVALIDDATA;

    avio_skip(s->pb, 1); // padding

    st->codec->sample_rate = bfstm ? read32(s) : read16(s);
    if (!st->codec->sample_rate)
        return AVERROR_INVALIDDATA;

    if (!bfstm)
        avio_skip(s->pb, 2); // padding

    if (loop) {
        if (av_dict_set_int(&s->metadata, "loop_start",
                            av_rescale(read32(s), AV_TIME_BASE,
                                       st->codec->sample_rate),
                            0) < 0)
            return AVERROR(ENOMEM);
    } else {
        avio_skip(s->pb, 4);
    }

    st->start_time = 0;
    st->duration = read32(s);
    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

    if (!bfstm)
        start = read32(s);
    b->current_block = 0;
    b->block_count = read32(s);
    if (b->block_count > UINT16_MAX) {
        av_log(s, AV_LOG_WARNING, "too many blocks: %u\n", b->block_count);
        return AVERROR_INVALIDDATA;
    }

    b->block_size = read32(s);
    if (b->block_size > UINT32_MAX / st->codec->channels)
        return AVERROR_INVALIDDATA;

    b->samples_per_block = read32(s);
    b->last_block_used_bytes = read32(s);
    b->last_block_samples = read32(s);
    b->last_block_size = read32(s);
    if (b->last_block_size > UINT32_MAX / st->codec->channels)
        return AVERROR_INVALIDDATA;
    if (b->last_block_used_bytes > b->last_block_size)
        return AVERROR_INVALIDDATA;


    if (codec == AV_CODEC_ID_ADPCM_THP || codec == AV_CODEC_ID_ADPCM_THP_LE) {
        int ch;

        avio_skip(s->pb, pos + toffset - avio_tell(s->pb));
        if (!bfstm)
            toffset = read32(s) + 16LL;
        else
            toffset = toffset + read32(s) + st->codec->channels * 8 - 8;
        if (toffset > size)
            return AVERROR_INVALIDDATA;

        avio_skip(s->pb, pos + toffset - avio_tell(s->pb));
        b->table = av_mallocz(32 * st->codec->channels);
        if (!b->table)
            return AVERROR(ENOMEM);

        for (ch = 0; ch < st->codec->channels; ch++) {
            if (avio_read(s->pb, b->table + ch * 32, 32) != 32) {
                ret = AVERROR_INVALIDDATA;
                goto fail;
            }
            avio_skip(s->pb, bfstm ? 14 : 24);
        }
    }

    if (size < (avio_tell(s->pb) - pos)) {
        ret = AVERROR_INVALIDDATA;
        goto fail;
    }

    avio_skip(s->pb, size - (avio_tell(s->pb) - pos));

    while (!avio_feof(s->pb)) {
        chunk = avio_rl32(s->pb);
        size  = read32(s);
        if (size < 8) {
            ret = AVERROR_INVALIDDATA;
            goto fail;
        }
        size -= 8;
        switch (chunk) {
        case MKTAG('S','E','E','K'):
        case MKTAG('A','D','P','C'):
            if (codec != AV_CODEC_ID_ADPCM_THP &&
                codec != AV_CODEC_ID_ADPCM_THP_LE)
                goto skip;

            asize = b->block_count * st->codec->channels * 4;
            if (size < asize) {
                ret = AVERROR_INVALIDDATA;
                goto fail;
            }
            if (b->adpc) {
                av_log(s, AV_LOG_WARNING, "skipping additional ADPC chunk\n");
                goto skip;
            } else {
                b->adpc = av_mallocz(asize);
                if (!b->adpc) {
                    ret = AVERROR(ENOMEM);
                    goto fail;
                }
                if (bfstm && codec != AV_CODEC_ID_ADPCM_THP_LE) {
                    // Big-endian BFSTMs have little-endian SEEK tables
                    // for some strange reason.
                    int i;
                    for (i = 0; i < asize; i += 2) {
                        b->adpc[i+1] = avio_r8(s->pb);
                        b->adpc[i]   = avio_r8(s->pb);
                    }
                } else {
                    avio_read(s->pb, b->adpc, asize);
                }
                avio_skip(s->pb, size - asize);
            }
            break;
        case MKTAG('D','A','T','A'):
            if ((start < avio_tell(s->pb)) ||
                (!b->adpc && (codec == AV_CODEC_ID_ADPCM_THP ||
                              codec == AV_CODEC_ID_ADPCM_THP_LE))) {
                ret = AVERROR_INVALIDDATA;
                goto fail;
            }
            avio_skip(s->pb, start - avio_tell(s->pb));

            if (bfstm && (codec == AV_CODEC_ID_ADPCM_THP ||
                          codec == AV_CODEC_ID_ADPCM_THP_LE))
                avio_skip(s->pb, 24);

            b->data_start = avio_tell(s->pb);

            if (!bfstm && (major != 1 || minor))
                avpriv_request_sample(s, "Version %d.%d", major, minor);

            return 0;
        default:
            av_log(s, AV_LOG_WARNING, "skipping unknown chunk: %X\n", chunk);
skip:
            avio_skip(s->pb, size);
        }
    }

fail:
    read_close(s);

    return ret;
}
Exemple #28
0
            int n;

            for (n = 0; n < ogg->nstreams; n++) {
                av_freep(&ogg->streams[n].buf);
                av_freep(&ogg->streams[n].private);
            }
            ogg->curidx   = -1;
            ogg->nstreams = 0;
        }
        idx = ogg_new_stream (s, serial);
        if (idx < 0)
            return -1;
    }

    os = ogg->streams + idx;
    os->page_pos = avio_tell(bc) - 27;

    if(os->psize > 0)
        ogg_new_buf(ogg, idx);

    if (avio_read (bc, os->segments, nsegs) < nsegs)
        return -1;

    os->nsegs = nsegs;
    os->segp = 0;

    size = 0;
    for (i = 0; i < nsegs; i++)
        size += os->segments[i];

    if (flags & OGG_FLAG_CONT || os->incomplete){
Exemple #29
0
static int iff_read_header(AVFormatContext *s,
                           AVFormatParameters *ap)
{
    IffDemuxContext *iff = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *st;
    uint32_t chunk_id, data_size;
    int compression = -1;

    st = av_new_stream(s, 0);
    if (!st)
        return AVERROR(ENOMEM);

    st->codec->channels = 1;
    avio_skip(pb, 8);
    // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
    st->codec->codec_tag = avio_rl32(pb);

    while(!pb->eof_reached) {
        uint64_t orig_pos;
        int res;
        const char *metadata_tag = NULL;
        chunk_id = avio_rl32(pb);
        data_size = avio_rb32(pb);
        orig_pos = avio_tell(pb);

        switch(chunk_id) {
        case ID_VHDR:
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

            if (data_size < 14)
                return AVERROR_INVALIDDATA;
            avio_skip(pb, 12);
            st->codec->sample_rate = avio_rb16(pb);
            if (data_size >= 16) {
                avio_skip(pb, 1);
                compression        = avio_r8(pb);
            }
            break;

        case ID_BODY:
            iff->body_pos = avio_tell(pb);
            iff->body_size = data_size;
            break;

        case ID_CHAN:
            if (data_size < 4)
                return AVERROR_INVALIDDATA;
            st->codec->channels = (avio_rb32(pb) < 6) ? 1 : 2;
            break;

        case ID_CMAP:
            st->codec->extradata_size = data_size;
            st->codec->extradata      = av_malloc(data_size);
            if (!st->codec->extradata)
                return AVERROR(ENOMEM);
            if (avio_read(pb, st->codec->extradata, data_size) < 0)
                return AVERROR(EIO);
            break;

        case ID_BMHD:
            st->codec->codec_type            = AVMEDIA_TYPE_VIDEO;
            if (data_size <= 8)
                return AVERROR_INVALIDDATA;
            st->codec->width                 = avio_rb16(pb);
            st->codec->height                = avio_rb16(pb);
            avio_skip(pb, 4); // x, y offset
            st->codec->bits_per_coded_sample = avio_r8(pb);
            if (data_size >= 11) {
                avio_skip(pb, 1); // masking
                compression                  = avio_r8(pb);
            }
            if (data_size >= 16) {
                avio_skip(pb, 3); // paddding, transparent
                st->sample_aspect_ratio.num  = avio_r8(pb);
                st->sample_aspect_ratio.den  = avio_r8(pb);
            }
            break;

        case ID_ANNO:
        case ID_TEXT:
            metadata_tag = "comment";
            break;

        case ID_AUTH:
            metadata_tag = "artist";
            break;

        case ID_COPYRIGHT:
            metadata_tag = "copyright";
            break;

        case ID_NAME:
            metadata_tag = "title";
            break;
        }

        if (metadata_tag) {
            if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
                av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!", metadata_tag);
                return res;
            }
        }
        avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
    }

    avio_seek(pb, iff->body_pos, SEEK_SET);

    switch(st->codec->codec_type) {
    case AVMEDIA_TYPE_AUDIO:
        av_set_pts_info(st, 32, 1, st->codec->sample_rate);

        switch(compression) {
        case COMP_NONE:
            st->codec->codec_id = CODEC_ID_PCM_S8;
            break;
        case COMP_FIB:
            st->codec->codec_id = CODEC_ID_8SVX_FIB;
            break;
        case COMP_EXP:
            st->codec->codec_id = CODEC_ID_8SVX_EXP;
            break;
        default:
            av_log(s, AV_LOG_ERROR, "unknown compression method\n");
            return -1;
        }

        st->codec->bits_per_coded_sample = 8;
        st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
        st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
        break;

    case AVMEDIA_TYPE_VIDEO:
        switch (compression) {
        case BITMAP_RAW:
            st->codec->codec_id = CODEC_ID_IFF_ILBM;
            break;
        case BITMAP_BYTERUN1:
            st->codec->codec_id = CODEC_ID_IFF_BYTERUN1;
            break;
        default:
            av_log(s, AV_LOG_ERROR, "unknown compression method\n");
            return AVERROR_INVALIDDATA;
        }
        break;
    default:
        return -1;
    }

    return 0;
}
/*
 * Process EA file header
 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
 */
static int process_ea_header(AVFormatContext *s) {
    uint32_t blockid, size = 0;
    EaDemuxContext *ea = s->priv_data;
    AVIOContext *pb = s->pb;
    int i;

    for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
        unsigned int startpos = avio_tell(pb);
        int err = 0;

        blockid = avio_rl32(pb);
        size = avio_rl32(pb);
        if (i == 0)
            ea->big_endian = size > 0x000FFFFF;
        if (ea->big_endian)
            size = av_bswap32(size);

        switch (blockid) {
            case ISNh_TAG:
                if (avio_rl32(pb) != EACS_TAG) {
                    av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
                    return 0;
                }
                err = process_audio_header_eacs(s);
                break;

            case SCHl_TAG :
            case SHEN_TAG :
                blockid = avio_rl32(pb);
                if (blockid == GSTR_TAG) {
                    avio_skip(pb, 4);
                } else if ((blockid & 0xFFFF)!=PT00_TAG) {
                    av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
                    return 0;
                }
                err = process_audio_header_elements(s);
                break;

            case SEAD_TAG:
                err = process_audio_header_sead(s);
                break;

            case MVIh_TAG :
                err = process_video_header_cmv(s);
                break;

            case kVGT_TAG:
                ea->video_codec = CODEC_ID_TGV;
                break;

            case mTCD_TAG :
                err = process_video_header_mdec(s);
                break;

            case MPCh_TAG:
                ea->video_codec = CODEC_ID_MPEG2VIDEO;
                break;

            case pQGT_TAG:
            case TGQs_TAG:
                ea->video_codec = CODEC_ID_TGQ;
                break;

            case pIQT_TAG:
                ea->video_codec = CODEC_ID_TQI;
                break;

            case MADk_TAG :
                ea->video_codec = CODEC_ID_MAD;
                break;

            case MVhd_TAG :
                err = process_video_header_vp6(s);
                break;
        }

        if (err < 0) {
            av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
            return err;
        }

        avio_seek(pb, startpos + size, SEEK_SET);
    }

    avio_seek(pb, 0, SEEK_SET);

    return 1;
}