static int mpc_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
	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 -1;
	}
	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 -1;
	}
	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 -1;
	}
	c->frames = av_malloc(c->fcount * sizeof(MPCFrame));
	c->curframe = 0;
	c->lastframe = -1;
	c->curbits = 8;
	c->frames_noted = 0;

	st = av_new_stream(s, 0);
	if (!st)
		return AVERROR(ENOMEM);
	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
	st->codec->codec_id = 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];
	av_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_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
			ff_id3v1_read(s);
		avio_seek(s->pb, pos, SEEK_SET);
	}

	return 0;
}
Beispiel #2
0
static int bmv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    BMVContext *c = s->priv_data;
    int type;
    void *tmp;

    while (c->get_next) {
        if (s->pb->eof_reached)
            return AVERROR_EOF;
        type = avio_r8(s->pb);
        if (type == BMV_NOP)
            continue;
        if (type == BMV_END)
            return AVERROR_EOF;
        c->size = avio_rl24(s->pb);
        if (!c->size)
            return AVERROR_INVALIDDATA;
        tmp = av_realloc(c->packet, c->size + 1);
        if (!tmp)
            return AVERROR(ENOMEM);
        c->packet = tmp;
        c->packet[0] = type;
        if (avio_read(s->pb, c->packet + 1, c->size) != c->size)
            return AVERROR(EIO);
        if (type & BMV_AUDIO) {
            int audio_size = c->packet[1] * 65 + 1;
            if (audio_size >= c->size) {
                av_log(s, AV_LOG_ERROR, "Reported audio size %d is bigger than packet size (%d)\n",
                       audio_size, c->size);
                return AVERROR_INVALIDDATA;
            }
            if (av_new_packet(pkt, audio_size) < 0)
                return AVERROR(ENOMEM);
            memcpy(pkt->data, c->packet + 1, pkt->size);
            pkt->stream_index = 1;
            pkt->pts          = c->audio_pos;
            pkt->duration     = c->packet[1] * 32;
            c->audio_pos += pkt->duration;
            c->get_next   = 0;
            return pkt->size;
        } else
            break;
    }
    if (av_new_packet(pkt, c->size + 1) < 0)
        return AVERROR(ENOMEM);
    pkt->stream_index = 0;
    c->get_next = 1;
    memcpy(pkt->data, c->packet, pkt->size);
    return pkt->size;
}
static int sds_read_header(AVFormatContext *ctx)
{
    SDSContext *s = ctx->priv_data;
    unsigned sample_period;
    AVIOContext *pb = ctx->pb;
    AVStream *st;

    st = avformat_new_stream(ctx, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    avio_skip(pb, 4);
    avio_skip(pb, 2);

    s->bit_depth = avio_r8(pb);
    if (s->bit_depth < 8 || s->bit_depth > 28)
        return AVERROR_INVALIDDATA;

    if (s->bit_depth < 14) {
        s->read_block = byte2_read;
        s->size = 60 * 4;
    } else if (s->bit_depth < 21) {
        s->read_block = byte3_read;
        s->size = 40 * 4;
    } else {
        s->read_block = byte4_read;
        s->size = 30 * 4;
    }
    st->codecpar->codec_id = AV_CODEC_ID_PCM_U32LE;

    sample_period = avio_rl24(pb);
    sample_period = SDS_3BYTE_TO_INT_DECODE(sample_period);
    avio_skip(pb, 11);

    st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codecpar->channels = 1;
    st->codecpar->sample_rate = sample_period ? 1000000000 / sample_period : 16000;
    st->duration = (avio_size(pb) - 21) / (127) * s->size / 4;

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

    return 0;
}
Beispiel #4
0
static int vc1t_read_header(AVFormatContext *s,
                           AVFormatParameters *ap)
{
    AVIOContext *pb = s->pb;
    AVStream *st;
    int frames;
    uint32_t fps;

    frames = avio_rl24(pb);
    if(avio_r8(pb) != 0xC5 || avio_rl32(pb) != 4)
        return -1;

    /* init video codec */
    st = av_new_stream(s, 0);
    if (!st)
        return -1;

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = CODEC_ID_WMV3;

    st->codec->extradata = av_malloc(VC1_EXTRADATA_SIZE);
    st->codec->extradata_size = VC1_EXTRADATA_SIZE;
    avio_read(pb, st->codec->extradata, VC1_EXTRADATA_SIZE);
    st->codec->height = avio_rl32(pb);
    st->codec->width = avio_rl32(pb);
    if(avio_rl32(pb) != 0xC)
        return -1;
    avio_skip(pb, 8);
    fps = avio_rl32(pb);
    if(fps == 0xFFFFFFFF)
        av_set_pts_info(st, 32, 1, 1000);
    else{
        if (!fps) {
            av_log(s, AV_LOG_ERROR, "Zero FPS specified, defaulting to 1 FPS\n");
            fps = 1;
        }
        av_set_pts_info(st, 24, 1, fps);
        st->duration = frames;
    }

    return 0;
}
Beispiel #5
0
static int vc1t_read_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    AVStream *st;
    int frames;
    uint32_t fps;

    frames = avio_rl24(pb);
    if(avio_r8(pb) != 0xC5 || avio_rl32(pb) != 4)
        return AVERROR_INVALIDDATA;

    /* init video codec */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codecpar->codec_id = AV_CODEC_ID_WMV3;

    if (ff_get_extradata(s, st->codecpar, pb, VC1_EXTRADATA_SIZE) < 0)
        return AVERROR(ENOMEM);
    st->codecpar->height = avio_rl32(pb);
    st->codecpar->width = avio_rl32(pb);
    if(avio_rl32(pb) != 0xC)
        return AVERROR_INVALIDDATA;
    avio_skip(pb, 8);
    fps = avio_rl32(pb);
    if(fps == 0xFFFFFFFF)
        avpriv_set_pts_info(st, 32, 1, 1000);
    else {
        if (!fps) {
            av_log(s, AV_LOG_ERROR, "Zero FPS specified, defaulting to 1 FPS\n");
            fps = 1;
        }
        avpriv_set_pts_info(st, 24, 1, fps);
        st->duration = frames;
    }

    return 0;
}
Beispiel #6
0
static int vc1t_read_packet(AVFormatContext *s,
                           AVPacket *pkt)
{
    AVIOContext *pb = s->pb;
    int frame_size;
    int keyframe = 0;
    uint32_t pts;

    if(url_feof(pb))
        return AVERROR(EIO);

    frame_size = avio_rl24(pb);
    if(avio_r8(pb) & 0x80)
        keyframe = 1;
    pts = avio_rl32(pb);
    if(av_get_packet(pb, pkt, frame_size) < 0)
        return AVERROR(EIO);
    if(s->streams[0]->time_base.den == 1000)
        pkt->pts = pts;
    pkt->flags |= keyframe ? AV_PKT_FLAG_KEY : 0;
    pkt->pos -= 8;

    return pkt->size;
}
Beispiel #7
0
static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
    AVIOContext *pb = s->pb;
    SmackerContext *smk = s->priv_data;
    AVStream *st, *ast[7];
    int i, ret;
    int tbase;

    /* read and check header */
    smk->magic = avio_rl32(pb);
    if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4'))
        return -1;
    smk->width = avio_rl32(pb);
    smk->height = avio_rl32(pb);
    smk->frames = avio_rl32(pb);
    smk->pts_inc = (int32_t)avio_rl32(pb);
    smk->flags = avio_rl32(pb);
    if(smk->flags & SMACKER_FLAG_RING_FRAME)
        smk->frames++;
    for(i = 0; i < 7; i++)
        smk->audio[i] = avio_rl32(pb);
    smk->treesize = avio_rl32(pb);

    if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant)
        av_log(s, AV_LOG_ERROR, "treesize too large\n");
        return -1;
    }

//FIXME remove extradata "rebuilding"
    smk->mmap_size = avio_rl32(pb);
    smk->mclr_size = avio_rl32(pb);
    smk->full_size = avio_rl32(pb);
    smk->type_size = avio_rl32(pb);
    for(i = 0; i < 7; i++) {
        smk->rates[i]  = avio_rl24(pb);
        smk->aflags[i] = avio_r8(pb);
    }
    smk->pad = avio_rl32(pb);
    /* setup data */
    if(smk->frames > 0xFFFFFF) {
        av_log(s, AV_LOG_ERROR, "Too many frames: %i\n", smk->frames);
        return -1;
    }
    smk->frm_size = av_malloc(smk->frames * 4);
    smk->frm_flags = av_malloc(smk->frames);

    smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2'));

    /* read frame info */
    for(i = 0; i < smk->frames; i++) {
        smk->frm_size[i] = avio_rl32(pb);
    }
    for(i = 0; i < smk->frames; i++) {
        smk->frm_flags[i] = avio_r8(pb);
    }

    /* init video codec */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return -1;
    smk->videoindex = st->index;
    st->codec->width = smk->width;
    st->codec->height = smk->height;
    st->codec->pix_fmt = PIX_FMT_PAL8;
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = CODEC_ID_SMACKVIDEO;
    st->codec->codec_tag = smk->magic;
    /* Smacker uses 100000 as internal timebase */
    if(smk->pts_inc < 0)
        smk->pts_inc = -smk->pts_inc;
    else
        smk->pts_inc *= 100;
    tbase = 100000;
    av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1);
    avpriv_set_pts_info(st, 33, smk->pts_inc, tbase);
    st->duration = smk->frames;
    /* handle possible audio streams */
    for(i = 0; i < 7; i++) {
        smk->indexes[i] = -1;
        if (smk->rates[i]) {
            ast[i] = avformat_new_stream(s, NULL);
            smk->indexes[i] = ast[i]->index;
            ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO;
            if (smk->aflags[i] & SMK_AUD_BINKAUD) {
                ast[i]->codec->codec_id = CODEC_ID_BINKAUDIO_RDFT;
            } else if (smk->aflags[i] & SMK_AUD_USEDCT) {
                ast[i]->codec->codec_id = CODEC_ID_BINKAUDIO_DCT;
            } else if (smk->aflags[i] & SMK_AUD_PACKED){
                ast[i]->codec->codec_id = CODEC_ID_SMACKAUDIO;
                ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A');
            } else {
                ast[i]->codec->codec_id = CODEC_ID_PCM_U8;
            }
            ast[i]->codec->channels = (smk->aflags[i] & SMK_AUD_STEREO) ? 2 : 1;
            ast[i]->codec->sample_rate = smk->rates[i];
            ast[i]->codec->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8;
            if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == CODEC_ID_PCM_U8)
                ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
            avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate
                    * ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8);
        }
    }


    /* load trees to extradata, they will be unpacked by decoder */
    st->codec->extradata = av_malloc(smk->treesize + 16);
    st->codec->extradata_size = smk->treesize + 16;
    if(!st->codec->extradata){
        av_log(s, AV_LOG_ERROR, "Cannot allocate %i bytes of extradata\n", smk->treesize + 16);
        av_free(smk->frm_size);
        av_free(smk->frm_flags);
        return -1;
    }
    ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16);
    if(ret != st->codec->extradata_size - 16){
        av_free(smk->frm_size);
        av_free(smk->frm_flags);
        return AVERROR(EIO);
    }
    ((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size);
    ((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size);
    ((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size);
    ((int32_t*)st->codec->extradata)[3] = av_le2ne32(smk->type_size);

    smk->curstream = -1;
    smk->nextpos = avio_tell(pb);

    return 0;
}
Beispiel #8
0
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int append)
{
    WVContext *wc = ctx->priv_data;
    uint32_t tag, ver;
    int size;
    int rate, bpp, chan;
    uint32_t chmask;

    wc->pos = avio_tell(pb);
    if(!append) {
        tag = avio_rl32(pb);
        if (tag != MKTAG('w', 'v', 'p', 'k'))
            return AVERROR_INVALIDDATA;
        size = avio_rl32(pb);
        if(size < 24 || size > WV_BLOCK_LIMIT) {
            av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
            return AVERROR_INVALIDDATA;
        }
        wc->blksize = size;
        ver = avio_rl16(pb);
        if(ver < 0x402 || ver > 0x410) {
            av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
            return AVERROR_PATCHWELCOME;
        }
        avio_r8(pb); // track no
        avio_r8(pb); // track sub index
        wc->samples = avio_rl32(pb); // total samples in file
        wc->soff = avio_rl32(pb); // offset in samples of current block
        avio_read(pb, wc->extra, WV_EXTRA_SIZE);
    } else {
        size = wc->blksize;
    }
    wc->flags = AV_RL32(wc->extra + 4);
    // blocks with zero samples don't contain actual audio information and should be ignored
    if (!AV_RN32(wc->extra))
        return 0;
    //parse flags
    bpp = ((wc->flags & 3) + 1) << 3;
    chan = 1 + !(wc->flags & WV_MONO);
    chmask = wc->flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
    rate = wv_rates[(wc->flags >> 23) & 0xF];
    wc->multichannel = !!((wc->flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK);
    if(wc->multichannel) {
        chan = wc->chan;
        chmask = wc->chmask;
    }
    if((rate == -1 || !chan) && !wc->block_parsed) {
        int64_t block_end = avio_tell(pb) + wc->blksize - 24;
        if(!pb->seekable) {
            av_log(ctx, AV_LOG_ERROR, "Cannot determine additional parameters\n");
            return AVERROR_INVALIDDATA;
        }
        while(avio_tell(pb) < block_end) {
            int id, size;
            id = avio_r8(pb);
            size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
            size <<= 1;
            if(id&0x40)
                size--;
            switch(id&0x3F) {
            case 0xD:
                if(size <= 1) {
                    av_log(ctx, AV_LOG_ERROR, "Insufficient channel information\n");
                    return AVERROR_INVALIDDATA;
                }
                chan = avio_r8(pb);
                switch(size - 2) {
                case 0:
                    chmask = avio_r8(pb);
                    break;
                case 1:
                    chmask = avio_rl16(pb);
                    break;
                case 2:
                    chmask = avio_rl24(pb);
                    break;
                case 3:
                    chmask = avio_rl32(pb);
                    break;
                case 5:
                    avio_skip(pb, 1);
                    chan |= (avio_r8(pb) & 0xF) << 8;
                    chmask = avio_rl24(pb);
                    break;
                default:
                    av_log(ctx, AV_LOG_ERROR, "Invalid channel info size %d\n", size);
                    return AVERROR_INVALIDDATA;
                }
                break;
            case 0x27:
                rate = avio_rl24(pb);
                break;
            default:
                avio_skip(pb, size);
            }
            if(id&0x40)
                avio_skip(pb, 1);
        }
        if(rate == -1) {
            av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
            return AVERROR_INVALIDDATA;
        }
        avio_seek(pb, block_end - wc->blksize + 24, SEEK_SET);
    }
    if(!wc->bpp) wc->bpp = bpp;
    if(!wc->chan) wc->chan = chan;
    if(!wc->chmask) wc->chmask = chmask;
    if(!wc->rate) wc->rate = rate;

    if(wc->flags && bpp != wc->bpp) {
        av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
        return AVERROR_INVALIDDATA;
    }
    if(wc->flags && !wc->multichannel && chan != wc->chan) {
        av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
        return AVERROR_INVALIDDATA;
    }
    if(wc->flags && rate != -1 && rate != wc->rate) {
        av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
        return AVERROR_INVALIDDATA;
    }
    wc->blksize = size - 24;
    return 0;
}
Beispiel #9
0
int
voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
{
    VocDecContext *voc = s->priv_data;
    AVCodecContext *dec = st->codec;
    AVIOContext *pb = s->pb;
    VocType type;
    int size, tmp_codec=-1;
    int sample_rate = 0;
    int channels = 1;

    while (!voc->remaining_size) {
        type = avio_r8(pb);
        if (type == VOC_TYPE_EOF)
            return AVERROR(EIO);
        voc->remaining_size = avio_rl24(pb);
        if (!voc->remaining_size) {
            if (!s->pb->seekable)
                return AVERROR(EIO);
            voc->remaining_size = avio_size(pb) - avio_tell(pb);
        }
        max_size -= 4;

        switch (type) {
        case VOC_TYPE_VOICE_DATA:
            dec->sample_rate = 1000000 / (256 - avio_r8(pb));
            if (sample_rate)
                dec->sample_rate = sample_rate;
            dec->channels = channels;
            tmp_codec = avio_r8(pb);
            dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
            voc->remaining_size -= 2;
            max_size -= 2;
            channels = 1;
            break;

        case VOC_TYPE_VOICE_DATA_CONT:
            break;

        case VOC_TYPE_EXTENDED:
            sample_rate = avio_rl16(pb);
            avio_r8(pb);
            channels = avio_r8(pb) + 1;
            sample_rate = 256000000 / (channels * (65536 - sample_rate));
            voc->remaining_size = 0;
            max_size -= 4;
            break;

        case VOC_TYPE_NEW_VOICE_DATA:
            dec->sample_rate = avio_rl32(pb);
            dec->bits_per_coded_sample = avio_r8(pb);
            dec->channels = avio_r8(pb);
            tmp_codec = avio_rl16(pb);
            avio_skip(pb, 4);
            voc->remaining_size -= 12;
            max_size -= 12;
            break;

        default:
            avio_skip(pb, voc->remaining_size);
            max_size -= voc->remaining_size;
            voc->remaining_size = 0;
            break;
        }
    }

    if (tmp_codec >= 0) {
        tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
        if (dec->codec_id == CODEC_ID_NONE)
            dec->codec_id = tmp_codec;
        else if (dec->codec_id != tmp_codec)
            av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
        if (dec->codec_id == CODEC_ID_NONE) {
            if (s->audio_codec_id == CODEC_ID_NONE) {
                av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
                return AVERROR(EINVAL);
            }
            av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
        }
    }

    dec->bit_rate = dec->sample_rate * dec->bits_per_coded_sample;

    if (max_size <= 0)
        max_size = 2048;
    size = FFMIN(voc->remaining_size, max_size);
    voc->remaining_size -= size;
    return av_get_packet(pb, pkt, size);
}
Beispiel #10
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->channel_layout = AV_CH_LAYOUT_STEREO;
    st->codec->bits_per_coded_sample = 16;

    if (ff_get_extradata(st->codec, s->pb, 16) < 0)
        return AVERROR(ENOMEM);
    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;
}
Beispiel #11
0
static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    int ret, size;
    int64_t left;
    AVStream *st;
    WAVDemuxContext *wav = s->priv_data;

    if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 &&
        s->streams[0]->codec->codec_tag == 1) {
        enum AVCodecID codec;
        ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer,
                             &codec);
        if (ret > AVPROBE_SCORE_EXTENSION) {
            s->streams[0]->codec->codec_id = codec;
            wav->spdif = 1;
        } else {
            wav->spdif = -1;
        }
    }
    if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
        return ff_spdif_read_packet(s, pkt);

    if (wav->smv_data_ofs > 0) {
        int64_t audio_dts, video_dts;
smv_retry:
        audio_dts = s->streams[0]->cur_dts;
        video_dts = s->streams[1]->cur_dts;

        if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
            /*We always return a video frame first to get the pixel format first*/
            wav->smv_last_stream = wav->smv_given_first ?
                av_compare_ts(video_dts, s->streams[1]->time_base,
                              audio_dts, s->streams[0]->time_base) > 0 : 0;
            wav->smv_given_first = 1;
        }
        wav->smv_last_stream = !wav->smv_last_stream;
        wav->smv_last_stream |= wav->audio_eof;
        wav->smv_last_stream &= !wav->smv_eof;
        if (wav->smv_last_stream) {
            uint64_t old_pos = avio_tell(s->pb);
            uint64_t new_pos = wav->smv_data_ofs +
                wav->smv_block * wav->smv_block_size;
            if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
                ret = AVERROR_EOF;
                goto smv_out;
            }
            size = avio_rl24(s->pb);
            ret  = av_get_packet(s->pb, pkt, size);
            if (ret < 0)
                goto smv_out;
            pkt->pos -= 3;
            pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt;
            wav->smv_cur_pt++;
            if (wav->smv_frames_per_jpeg > 0)
                wav->smv_cur_pt %= wav->smv_frames_per_jpeg;
            if (!wav->smv_cur_pt)
                wav->smv_block++;

            pkt->stream_index = 1;
smv_out:
            avio_seek(s->pb, old_pos, SEEK_SET);
            if (ret == AVERROR_EOF) {
                wav->smv_eof = 1;
                goto smv_retry;
            }
            return ret;
        }
    }

    st = s->streams[0];

    left = wav->data_end - avio_tell(s->pb);
    if (wav->ignore_length)
        left = INT_MAX;
    if (left <= 0) {
        if (CONFIG_W64_DEMUXER && wav->w64)
            left = find_guid(s->pb, ff_w64_guid_data) - 24;
        else
            left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
        if (left < 0) {
            wav->audio_eof = 1;
            if (wav->smv_data_ofs > 0 && !wav->smv_eof)
                goto smv_retry;
            return AVERROR_EOF;
        }
        wav->data_end = avio_tell(s->pb) + left;
    }

    size = MAX_SIZE;
    if (st->codec->block_align > 1) {
        if (size < st->codec->block_align)
            size = st->codec->block_align;
        size = (size / st->codec->block_align) * st->codec->block_align;
    }
    size = FFMIN(size, left);
    ret  = av_get_packet(s->pb, pkt, size);
    if (ret < 0)
        return ret;
    pkt->stream_index = 0;

    return ret;
}
Beispiel #12
0
/* wav input */
static int wav_read_header(AVFormatContext *s)
{
    int64_t size, av_uninit(data_size);
    int64_t sample_count = 0;
    int rf64;
    uint32_t tag;
    AVIOContext *pb      = s->pb;
    AVStream *st         = NULL;
    WAVDemuxContext *wav = s->priv_data;
    int ret, got_fmt = 0;
    int64_t next_tag_ofs, data_ofs = -1;

    wav->smv_data_ofs = -1;

    /* check RIFF header */
    tag = avio_rl32(pb);

    rf64 = tag == MKTAG('R', 'F', '6', '4');
    if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
        return AVERROR_INVALIDDATA;
    avio_rl32(pb); /* file size */
    tag = avio_rl32(pb);
    if (tag != MKTAG('W', 'A', 'V', 'E'))
        return AVERROR_INVALIDDATA;

    if (rf64) {
        if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
            return AVERROR_INVALIDDATA;
        size = avio_rl32(pb);
        if (size < 24)
            return AVERROR_INVALIDDATA;
        avio_rl64(pb); /* RIFF size */

        data_size    = avio_rl64(pb);
        sample_count = avio_rl64(pb);

        if (data_size < 0 || sample_count < 0) {
            av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
                   "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
                   data_size, sample_count);
            return AVERROR_INVALIDDATA;
        }
        avio_skip(pb, size - 24); /* skip rest of ds64 chunk */

    }

    for (;;) {
        AVStream *vst;
        size         = next_tag(pb, &tag);
        next_tag_ofs = avio_tell(pb) + size;

        if (url_feof(pb))
            break;

        switch (tag) {
        case MKTAG('f', 'm', 't', ' '):
            /* only parse the first 'fmt ' tag found */
            if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
                return ret;
            } else if (got_fmt)
                av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");

            got_fmt = 1;
            break;
        case MKTAG('d', 'a', 't', 'a'):
            if (!got_fmt) {
                av_log(s, AV_LOG_ERROR,
                       "found no 'fmt ' tag before the 'data' tag\n");
                return AVERROR_INVALIDDATA;
            }

            if (rf64) {
                next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
            } else {
                data_size    = size;
                next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
            }

            data_ofs = avio_tell(pb);

            /* don't look for footer metadata if we can't seek or if we don't
             * know where the data tag ends
             */
            if (!pb->seekable || (!rf64 && !size))
                goto break_loop;
            break;
        case MKTAG('f', 'a', 'c', 't'):
            if (!sample_count)
                sample_count = avio_rl32(pb);
            break;
        case MKTAG('b', 'e', 'x', 't'):
            if ((ret = wav_parse_bext_tag(s, size)) < 0)
                return ret;
            break;
        case MKTAG('S','M','V','0'):
            if (!got_fmt) {
                av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
                return AVERROR_INVALIDDATA;
            }
            // SMV file, a wav file with video appended.
            if (size != MKTAG('0','2','0','0')) {
                av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
                goto break_loop;
            }
            av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
            wav->smv_given_first = 0;
            vst = avformat_new_stream(s, NULL);
            if (!vst)
                return AVERROR(ENOMEM);
            avio_r8(pb);
            vst->id = 1;
            vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
            vst->codec->codec_id = AV_CODEC_ID_SMVJPEG;
            vst->codec->width  = avio_rl24(pb);
            vst->codec->height = avio_rl24(pb);
            vst->codec->extradata_size = 4;
            vst->codec->extradata = av_malloc(vst->codec->extradata_size +
                                              FF_INPUT_BUFFER_PADDING_SIZE);
            if (!vst->codec->extradata) {
                av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
                return AVERROR(ENOMEM);
            }
            size = avio_rl24(pb);
            wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
            avio_rl24(pb);
            wav->smv_block_size = avio_rl24(pb);
            avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
            vst->duration = avio_rl24(pb);
            avio_rl24(pb);
            avio_rl24(pb);
            wav->smv_frames_per_jpeg = avio_rl24(pb);
            AV_WL32(vst->codec->extradata, wav->smv_frames_per_jpeg);
            wav->smv_cur_pt = 0;
            goto break_loop;
        case MKTAG('L', 'I', 'S', 'T'):
            if (size < 4) {
                av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
                return AVERROR_INVALIDDATA;
            }
            switch (avio_rl32(pb)) {
            case MKTAG('I', 'N', 'F', 'O'):
                ff_read_riff_info(s, size - 4);
            }
            break;
        }

        /* seek to next tag unless we know that we'll run into EOF */
        if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
            wav_seek_tag(pb, next_tag_ofs, SEEK_SET) < 0) {
            break;
        }
    }

break_loop:
    if (data_ofs < 0) {
        av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
        return AVERROR_INVALIDDATA;
    }

    avio_seek(pb, data_ofs, SEEK_SET);

    if (!sample_count && st->codec->channels &&
        av_get_bits_per_sample(st->codec->codec_id) && wav->data_end <= avio_size(pb))
        sample_count = (data_size << 3) /
                       (st->codec->channels *
                        (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
    if (sample_count)
        st->duration = sample_count;

    ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
    ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);

    return 0;
}
Beispiel #13
0
static int mtv_read_header(AVFormatContext *s)
{
    MTVDemuxContext *mtv = s->priv_data;
    AVIOContext   *pb  = s->pb;
    AVStream        *st;
    unsigned int    audio_subsegments;

    avio_skip(pb, 3);
    mtv->file_size         = avio_rl32(pb);
    mtv->segments          = avio_rl32(pb);
    avio_skip(pb, 32);
    mtv->audio_identifier  = avio_rl24(pb);
    mtv->audio_br          = avio_rl16(pb);
    mtv->img_colorfmt      = avio_rl24(pb);
    mtv->img_bpp           = avio_r8(pb)>>3;
    mtv->img_width         = avio_rl16(pb);
    mtv->img_height        = avio_rl16(pb);
    mtv->img_segment_size  = avio_rl16(pb);

    /* Assume 16bpp even if claimed otherwise.
     * We know its going to be RGBG565/555 anyway
     */
    if (mtv->img_bpp != MTV_IMAGE_DEFAULT_BPP) {
        av_log (s, AV_LOG_WARNING, "Header claims %dbpp (!= 16). Ignoring\n",
                mtv->img_bpp);
        mtv->img_bpp = MTV_IMAGE_DEFAULT_BPP;
    }

    /* Calculate width and height if missing from header */

    if(!mtv->img_width && mtv->img_height)
        mtv->img_width=mtv->img_segment_size / (mtv->img_bpp)
                        / mtv->img_height;

    if(!mtv->img_height && mtv->img_width)
        mtv->img_height=mtv->img_segment_size / (mtv->img_bpp)
                        / mtv->img_width;

    if(!mtv->img_height || !mtv->img_width || !mtv->img_segment_size){
        av_log(s, AV_LOG_ERROR, "width or height or segment_size is invalid and I cannot calculate them from other information\n");
        return AVERROR(EINVAL);
    }

    avio_skip(pb, 4);
    audio_subsegments = avio_rl16(pb);

    if (audio_subsegments == 0) {
        avpriv_request_sample(s, "MTV files without audio");
        return AVERROR_PATCHWELCOME;
    }

    mtv->full_segment_size =
        audio_subsegments * (MTV_AUDIO_PADDING_SIZE + MTV_ASUBCHUNK_DATA_SIZE) +
        mtv->img_segment_size;
    mtv->video_fps         = (mtv->audio_br / 4) / audio_subsegments;

    // FIXME Add sanity check here

    // all systems go! init decoders

    // video - raw rgb565

    st = avformat_new_stream(s, NULL);
    if(!st)
        return AVERROR(ENOMEM);

    avpriv_set_pts_info(st, 64, 1, mtv->video_fps);
    st->codec->codec_type      = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id        = AV_CODEC_ID_RAWVIDEO;
    st->codec->pix_fmt         = AV_PIX_FMT_RGB565BE;
    st->codec->width           = mtv->img_width;
    st->codec->height          = mtv->img_height;
    st->codec->sample_rate     = mtv->video_fps;
    st->codec->extradata       = av_strdup("BottomUp");
    st->codec->extradata_size  = 9;

    // audio - mp3

    st = avformat_new_stream(s, NULL);
    if(!st)
        return AVERROR(ENOMEM);

    avpriv_set_pts_info(st, 64, 1, MTV_AUDIO_SAMPLING_RATE);
    st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id        = AV_CODEC_ID_MP3;
    st->codec->bit_rate        = mtv->audio_br;
    st->need_parsing           = AVSTREAM_PARSE_FULL;

    // Jump over header

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

    return 0;

}
Beispiel #14
0
int
ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
{
    VocDecContext *voc = s->priv_data;
    AVCodecContext *dec = st->codec;
    AVIOContext *pb = s->pb;
    VocType type;
    int size, tmp_codec=-1;
    int sample_rate = 0;
    int channels = 1;
    int64_t duration;
    int ret;

    av_add_index_entry(st,
                       avio_tell(pb),
                       voc->pts,
                       voc->remaining_size,
                       0,
                       AVINDEX_KEYFRAME);

    while (!voc->remaining_size) {
        type = avio_r8(pb);
        if (type == VOC_TYPE_EOF)
            return AVERROR_EOF;
        voc->remaining_size = avio_rl24(pb);
        if (!voc->remaining_size) {
            if (!s->pb->seekable)
                return AVERROR(EIO);
            voc->remaining_size = avio_size(pb) - avio_tell(pb);
        }
        max_size -= 4;

        switch (type) {
        case VOC_TYPE_VOICE_DATA:
            if (!dec->sample_rate) {
                dec->sample_rate = 1000000 / (256 - avio_r8(pb));
                if (sample_rate)
                    dec->sample_rate = sample_rate;
                avpriv_set_pts_info(st, 64, 1, dec->sample_rate);
                dec->channels = channels;
                dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
            } else
                avio_skip(pb, 1);
            tmp_codec = avio_r8(pb);
            voc->remaining_size -= 2;
            max_size -= 2;
            channels = 1;
            break;

        case VOC_TYPE_VOICE_DATA_CONT:
            break;

        case VOC_TYPE_EXTENDED:
            sample_rate = avio_rl16(pb);
            avio_r8(pb);
            channels = avio_r8(pb) + 1;
            sample_rate = 256000000 / (channels * (65536 - sample_rate));
            voc->remaining_size = 0;
            max_size -= 4;
            break;

        case VOC_TYPE_NEW_VOICE_DATA:
            if (!dec->sample_rate) {
                dec->sample_rate = avio_rl32(pb);
                avpriv_set_pts_info(st, 64, 1, dec->sample_rate);
                dec->bits_per_coded_sample = avio_r8(pb);
                dec->channels = avio_r8(pb);
            } else
                avio_skip(pb, 6);
            tmp_codec = avio_rl16(pb);
            avio_skip(pb, 4);
            voc->remaining_size -= 12;
            max_size -= 12;
            break;

        default:
            avio_skip(pb, voc->remaining_size);
            max_size -= voc->remaining_size;
            voc->remaining_size = 0;
            break;
        }
    }

    if (tmp_codec >= 0) {
        tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
        if (dec->codec_id == AV_CODEC_ID_NONE)
            dec->codec_id = tmp_codec;
        else if (dec->codec_id != tmp_codec)
            av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
        if (dec->codec_id == AV_CODEC_ID_NONE) {
            if (s->audio_codec_id == AV_CODEC_ID_NONE) {
                av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
                return AVERROR(EINVAL);
            }
            av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
        }
    }

    dec->bit_rate = dec->sample_rate * dec->channels * dec->bits_per_coded_sample;

    if (max_size <= 0)
        max_size = 2048;
    size = FFMIN(voc->remaining_size, max_size);
    voc->remaining_size -= size;

    ret = av_get_packet(pb, pkt, size);
    pkt->dts = pkt->pts = voc->pts;

    duration = av_get_audio_frame_duration(st->codec, size);
    if (duration > 0 && voc->pts != AV_NOPTS_VALUE)
        voc->pts += duration;
    else
        voc->pts = AV_NOPTS_VALUE;

    return ret;
}
Beispiel #15
0
static int tak_read_header(AVFormatContext *s)
{
    TAKDemuxContext *tc = s->priv_data;
    AVIOContext *pb     = s->pb;
    GetBitContext gb;
    AVStream *st;
    uint8_t *buffer = NULL;
    int ret;

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

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id   = AV_CODEC_ID_TAK;
    st->need_parsing      = AVSTREAM_PARSE_FULL_RAW;

    tc->mlast_frame = 0;
    if (avio_rl32(pb) != MKTAG('t', 'B', 'a', 'K')) {
        avio_seek(pb, -4, SEEK_CUR);
        return 0;
    }

    while (!avio_feof(pb)) {
        enum TAKMetaDataType type;
        int size;

        type = avio_r8(pb) & 0x7f;
        size = avio_rl24(pb);

        switch (type) {
        case TAK_METADATA_STREAMINFO:
        case TAK_METADATA_LAST_FRAME:
        case TAK_METADATA_ENCODER:
            if (size <= 3)
                return AVERROR_INVALIDDATA;

            buffer = av_malloc(size - 3 + FF_INPUT_BUFFER_PADDING_SIZE);
            if (!buffer)
                return AVERROR(ENOMEM);
            memset(buffer + size - 3, 0, FF_INPUT_BUFFER_PADDING_SIZE);

            ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
            if (avio_read(pb, buffer, size - 3) != size - 3) {
                av_freep(&buffer);
                return AVERROR(EIO);
            }
            if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
                av_log(s, AV_LOG_ERROR, "%d metadata block CRC error.\n", type);
                if (s->error_recognition & AV_EF_EXPLODE) {
                    av_freep(&buffer);
                    return AVERROR_INVALIDDATA;
                }
            }

            init_get_bits8(&gb, buffer, size - 3);
            break;
        case TAK_METADATA_MD5: {
            uint8_t md5[16];
            int i;

            if (size != 19)
                return AVERROR_INVALIDDATA;
            ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
            avio_read(pb, md5, 16);
            if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
                av_log(s, AV_LOG_ERROR, "MD5 metadata block CRC error.\n");
                if (s->error_recognition & AV_EF_EXPLODE)
                    return AVERROR_INVALIDDATA;
            }

            av_log(s, AV_LOG_VERBOSE, "MD5=");
            for (i = 0; i < 16; i++)
                av_log(s, AV_LOG_VERBOSE, "%02x", md5[i]);
            av_log(s, AV_LOG_VERBOSE, "\n");
            break;
        }
        case TAK_METADATA_END: {
            int64_t curpos = avio_tell(pb);

            if (pb->seekable) {
                ff_ape_parse_tag(s);
                avio_seek(pb, curpos, SEEK_SET);
            }

            tc->data_end += curpos;
            return 0;
        }
        default:
            ret = avio_skip(pb, size);
            if (ret < 0)
                return ret;
        }

        if (type == TAK_METADATA_STREAMINFO) {
            TAKStreamInfo ti;

            avpriv_tak_parse_streaminfo(&gb, &ti);
            if (ti.samples > 0)
                st->duration = ti.samples;
            st->codec->bits_per_coded_sample = ti.bps;
            if (ti.ch_layout)
                st->codec->channel_layout = ti.ch_layout;
            st->codec->sample_rate           = ti.sample_rate;
            st->codec->channels              = ti.channels;
            st->start_time                   = 0;
            avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
            st->codec->extradata             = buffer;
            st->codec->extradata_size        = size - 3;
            buffer                           = NULL;
        } else if (type == TAK_METADATA_LAST_FRAME) {
            if (size != 11)
                return AVERROR_INVALIDDATA;
            tc->mlast_frame = 1;
            tc->data_end    = get_bits64(&gb, TAK_LAST_FRAME_POS_BITS) +
                              get_bits(&gb, TAK_LAST_FRAME_SIZE_BITS);
            av_freep(&buffer);
        } else if (type == TAK_METADATA_ENCODER) {
            av_log(s, AV_LOG_VERBOSE, "encoder version: %0X\n",
                   get_bits_long(&gb, TAK_ENCODER_VERSION_BITS));
            av_freep(&buffer);
        }
    }

    return AVERROR_EOF;
}
Beispiel #16
0
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
{
    WVContext *wc = ctx->priv_data;
    int ret;
    int rate, bpp, chan;
    uint32_t chmask, flags;

    wc->pos = avio_tell(pb);

    /* don't return bogus packets with the ape tag data */
    if (wc->apetag_start && wc->pos >= wc->apetag_start)
        return AVERROR_EOF;

    ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
    if (ret != WV_HEADER_SIZE)
        return (ret < 0) ? ret : AVERROR_EOF;

    ret = ff_wv_parse_header(&wc->header, wc->block_header);
    if (ret < 0) {
        av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
        return ret;
    }

    if (wc->header.version < 0x402 || wc->header.version > 0x410) {
        av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", wc->header.version);
        return AVERROR_PATCHWELCOME;
    }

    /* Blocks with zero samples don't contain actual audio information
     * and should be ignored */
    if (!wc->header.samples)
        return 0;
    // parse flags
    flags  = wc->header.flags;
    bpp    = ((flags & 3) + 1) << 3;
    chan   = 1 + !(flags & WV_MONO);
    chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
    rate   = wv_rates[(flags >> 23) & 0xF];
    wc->multichannel = !(wc->header.initial && wc->header.final);
    if (wc->multichannel) {
        chan   = wc->chan;
        chmask = wc->chmask;
    }
    if ((rate == -1 || !chan) && !wc->block_parsed) {
        int64_t block_end = avio_tell(pb) + wc->header.blocksize;
        if (!pb->seekable) {
            av_log(ctx, AV_LOG_ERROR,
                   "Cannot determine additional parameters\n");
            return AVERROR_INVALIDDATA;
        }
        while (avio_tell(pb) < block_end) {
            int id, size;
            id   = avio_r8(pb);
            size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
            size <<= 1;
            if (id & 0x40)
                size--;
            switch (id & 0x3F) {
            case 0xD:
                if (size <= 1) {
                    av_log(ctx, AV_LOG_ERROR,
                           "Insufficient channel information\n");
                    return AVERROR_INVALIDDATA;
                }
                chan = avio_r8(pb);
                switch (size - 2) {
                case 0:
                    chmask = avio_r8(pb);
                    break;
                case 1:
                    chmask = avio_rl16(pb);
                    break;
                case 2:
                    chmask = avio_rl24(pb);
                    break;
                case 3:
                    chmask = avio_rl32(pb);
                    break;
                case 5:
                    avio_skip(pb, 1);
                    chan  |= (avio_r8(pb) & 0xF) << 8;
                    chmask = avio_rl24(pb);
                    break;
                default:
                    av_log(ctx, AV_LOG_ERROR,
                           "Invalid channel info size %d\n", size);
                    return AVERROR_INVALIDDATA;
                }
                break;
            case 0x27:
                rate = avio_rl24(pb);
                break;
            default:
                avio_skip(pb, size);
            }
            if (id & 0x40)
                avio_skip(pb, 1);
        }
        if (rate == -1) {
            av_log(ctx, AV_LOG_ERROR,
                   "Cannot determine custom sampling rate\n");
            return AVERROR_INVALIDDATA;
        }
        avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
    }
    if (!wc->bpp)
        wc->bpp    = bpp;
    if (!wc->chan)
        wc->chan   = chan;
    if (!wc->chmask)
        wc->chmask = chmask;
    if (!wc->rate)
        wc->rate   = rate;

    if (flags && bpp != wc->bpp) {
        av_log(ctx, AV_LOG_ERROR,
               "Bits per sample differ, this block: %i, header block: %i\n",
               bpp, wc->bpp);
        return AVERROR_INVALIDDATA;
    }
    if (flags && !wc->multichannel && chan != wc->chan) {
        av_log(ctx, AV_LOG_ERROR,
               "Channels differ, this block: %i, header block: %i\n",
               chan, wc->chan);
        return AVERROR_INVALIDDATA;
    }
    if (flags && rate != -1 && rate != wc->rate) {
        av_log(ctx, AV_LOG_ERROR,
               "Sampling rate differ, this block: %i, header block: %i\n",
               rate, wc->rate);
        return AVERROR_INVALIDDATA;
    }
    return 0;
}
Beispiel #17
0
static int wav_read_packet(AVFormatContext *s,
                           AVPacket *pkt)
{
    int ret, size;
    int64_t left;
    AVStream *st;
    WAVDemuxContext *wav = s->priv_data;

    if (wav->smv_data_ofs > 0) {
        int64_t audio_dts, video_dts;
smv_retry:
        audio_dts = s->streams[0]->cur_dts;
        video_dts = s->streams[1]->cur_dts;
        if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
            audio_dts = av_rescale_q(audio_dts, s->streams[0]->time_base, AV_TIME_BASE_Q);
            video_dts = av_rescale_q(video_dts, s->streams[1]->time_base, AV_TIME_BASE_Q);
            wav->smv_last_stream = video_dts >= audio_dts;
        }
        wav->smv_last_stream = !wav->smv_last_stream;
        wav->smv_last_stream |= wav->audio_eof;
        wav->smv_last_stream &= !wav->smv_eof;
        if (wav->smv_last_stream) {
            uint64_t old_pos = avio_tell(s->pb);
            uint64_t new_pos = wav->smv_data_ofs +
                               wav->smv_block * wav->smv_block_size;
            if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
                ret = AVERROR_EOF;
                goto smv_out;
            }
            size = avio_rl24(s->pb);
            ret  = av_get_packet(s->pb, pkt, size);
            if (ret < 0)
                goto smv_out;
            pkt->pos -= 3;
            pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg;
            wav->smv_block++;
            pkt->stream_index = 1;
smv_out:
            avio_seek(s->pb, old_pos, SEEK_SET);
            if (ret == AVERROR_EOF) {
                wav->smv_eof = 1;
                goto smv_retry;
            }
            return ret;
        }
    }

    st = s->streams[0];

    left = wav->data_end - avio_tell(s->pb);
    if (wav->ignore_length)
        left= INT_MAX;
    if (left <= 0) {
        if (CONFIG_W64_DEMUXER && wav->w64)
            left = find_guid(s->pb, guid_data) - 24;
        else
            left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
        if (left < 0) {
            wav->audio_eof = 1;
            if (wav->smv_data_ofs > 0 && !wav->smv_eof)
                goto smv_retry;
            return AVERROR_EOF;
        }
        wav->data_end= avio_tell(s->pb) + left;
    }

    size = MAX_SIZE;
    if (st->codec->block_align > 1) {
        if (size < st->codec->block_align)
            size = st->codec->block_align;
        size = (size / st->codec->block_align) * st->codec->block_align;
    }
    size = FFMIN(size, left);
    ret  = av_get_packet(s->pb, pkt, size);
    if (ret < 0)
        return ret;
    pkt->stream_index = 0;

    return ret;
}