Exemple #1
0
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
{
    if (len > 6) {
        /* check for h264 start code */
        if (AV_RB32(data) == 0x00000001 ||
            AV_RB24(data) == 0x000001) {
            uint8_t *buf=NULL, *end, *start;
            uint32_t sps_size=0, pps_size=0;
            uint8_t *sps=0, *pps=0;

            int ret = ff_avc_parse_nal_units_buf(data, &buf, &len);
            if (ret < 0)
                return ret;
            start = buf;
            end = buf + len;

            /* look for sps and pps */
            while (buf < end) {
                unsigned int size;
                uint8_t nal_type;
                size = AV_RB32(buf);
                nal_type = buf[4] & 0x1f;
                if (nal_type == 7) { /* SPS */
                    sps = buf + 4;
                    sps_size = size;
                } else if (nal_type == 8) { /* PPS */
                    pps = buf + 4;
                    pps_size = size;
                }
                buf += size + 4;
            }
            assert(sps);
            assert(pps);

            avio_w8(pb, 1); /* version */
            avio_w8(pb, sps[1]); /* profile */
            avio_w8(pb, sps[2]); /* profile compat */
            avio_w8(pb, sps[3]); /* level */
            avio_w8(pb, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 1 (11) */
            avio_w8(pb, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */

            avio_wb16(pb, sps_size);
            avio_write(pb, sps, sps_size);
            avio_w8(pb, 1); /* number of pps */
            avio_wb16(pb, pps_size);
            avio_write(pb, pps, pps_size);
            av_free(start);
        } else {
            avio_write(pb, data, len);
        }
    }
    return 0;
}
Exemple #2
0
static void output_match(AVIOContext *out, int match_sample,
                         int match_offset, int match_len, int *entries)
{
    avio_w8(out, 2); /* sample constructor */
    avio_w8(out, 0); /* track reference */
    avio_wb16(out, match_len);
    avio_wb32(out, match_sample);
    avio_wb32(out, match_offset);
    avio_wb16(out, 1); /* bytes per block */
    avio_wb16(out, 1); /* samples per block */
    (*entries)++;
}
Exemple #3
0
static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
    if (pkt->size > 65535) {
        av_log(s, AV_LOG_ERROR,
               "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
        return -1;
    }
    avio_wb16(s->pb, pkt->size);
    avio_wb16(s->pb, 0x8010); // unknown
    avio_write(s->pb, pkt->data, pkt->size);
    return 0;
}
Exemple #4
0
static int rso_write_trailer(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    int64_t file_size;
    uint16_t coded_file_size;

    file_size = avio_tell(pb);

    if (file_size < 0)
        return file_size;

    if (file_size > 0xffff + RSO_HEADER_SIZE) {
        av_log(s, AV_LOG_WARNING,
               "Output file is too big (%"PRId64" bytes >= 64kB)\n", file_size);
        coded_file_size = 0xffff;
    } else {
        coded_file_size = file_size - RSO_HEADER_SIZE;
    }

    /* update file size */
    avio_seek(pb, 2, SEEK_SET);
    avio_wb16(pb, coded_file_size);
    avio_seek(pb, file_size, SEEK_SET);

    avio_flush(pb);

    return 0;
}
Exemple #5
0
static void put_str(AVIOContext *s, const char *tag)
{
    avio_wb16(s,strlen(tag));
    while (*tag) {
        avio_w8(s, *tag++);
    }
}
Exemple #6
0
int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
                       AVCodecParameters *par)
{
    int profile = par->profile;
    int level = par->level == FF_LEVEL_UNKNOWN ? 0 : par->level;
    int bit_depth = get_bit_depth(s, par->format);
    int vpx_color_space = get_vpx_color_space(s, par->color_space);
    int vpx_chroma_subsampling =
        get_vpx_chroma_subsampling(s, par->format, par->chroma_location);
    int vpx_transfer_function = get_vpx_transfer_function(par->color_trc);
    int vpx_video_full_range_flag =
        get_vpx_video_full_range_flag(par->color_range);

    if (bit_depth < 0 || vpx_color_space < 0 || vpx_chroma_subsampling < 0)
        return AVERROR_INVALIDDATA;

    if (profile == FF_PROFILE_UNKNOWN) {
        if (vpx_chroma_subsampling == VPX_SUBSAMPLING_420_VERTICAL ||
            vpx_chroma_subsampling == VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA) {
            profile = (bit_depth == 8) ? FF_PROFILE_VP9_0 : FF_PROFILE_VP9_2;
        } else {
            profile = (bit_depth == 8) ? FF_PROFILE_VP9_1 : FF_PROFILE_VP9_3;
        }
    }

    avio_w8(pb, profile);
    avio_w8(pb, level);
    avio_w8(pb, (bit_depth << 4) | vpx_color_space);
    avio_w8(pb, (vpx_chroma_subsampling << 4) | (vpx_transfer_function << 1) |
                    vpx_video_full_range_flag);

    // vp9 does not have codec initialization data.
    avio_wb16(pb, 0);
    return 0;
}
Exemple #7
0
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
{
    RMMuxContext *rm = s->priv_data;
    AVIOContext *pb = s->pb;
    StreamInfo *stream = rm->video_stream;
    int key_frame = !!(flags & AV_PKT_FLAG_KEY);

    /* XXX: this is incorrect: should be a parameter */

    /* Well, I spent some time finding the meaning of these bits. I am
       not sure I understood everything, but it works !! */
#if 1
    if (size > MAX_PACKET_SIZE) {
        av_log(s, AV_LOG_ERROR, "Muxing packets larger than 64 kB (%d) is not supported\n", size);
        return AVERROR_PATCHWELCOME;
    }
    write_packet_header(s, stream, size + 7 + (size >= 0x4000)*4, key_frame);
    /* bit 7: '1' if final packet of a frame converted in several packets */
    avio_w8(pb, 0x81);
    /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
       frame starting from 1 */
    if (key_frame) {
        avio_w8(pb, 0x81);
    } else {
        avio_w8(pb, 0x01);
    }
    if(size >= 0x4000) {
        avio_wb32(pb, size); /* total frame size */
        avio_wb32(pb, size); /* offset from the start or the end */
    } else {
        avio_wb16(pb, 0x4000 | size); /* total frame size */
        avio_wb16(pb, 0x4000 | size); /* offset from the start or the end */
    }
#else
    /* full frame */
    write_packet_header(s, size + 6);
    avio_w8(pb, 0xc0);
    avio_wb16(pb, 0x4000 + size); /* total frame size */
    avio_wb16(pb, 0x4000 + packet_number * 126); /* position in stream */
#endif
    avio_w8(pb, stream->nb_frames & 0xff);

    avio_write(pb, buf, size);

    stream->nb_frames++;
    return 0;
}
Exemple #8
0
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
{
    GXFContext *gxf = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *st = s->streams[pkt->stream_index];
    GXFStreamContext *sc = st->priv_data;
    unsigned field_nb;
    /* If the video is frame-encoded, the frame numbers shall be represented by
     * even field numbers.
     * see SMPTE360M-2004  6.4.2.1.3 Media field number */
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
        field_nb = gxf->nb_fields;
    } else {
        field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
                                  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
    }

    avio_w8(pb, sc->media_type);
    avio_w8(pb, st->index);
    avio_wb32(pb, field_nb);
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
        avio_wb16(pb, 0);
        avio_wb16(pb, size / 2);
    } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
        int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
        if (frame_type == AV_PICTURE_TYPE_I) {
            avio_w8(pb, 0x0d);
            sc->iframes++;
        } else if (frame_type == AV_PICTURE_TYPE_B) {
            avio_w8(pb, 0x0f);
            sc->bframes++;
        } else {
            avio_w8(pb, 0x0e);
            sc->pframes++;
        }
        avio_wb24(pb, size);
    } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
        avio_w8(pb, size / 4096);
        avio_wb24(pb, 0);
    } else
        avio_wb32(pb, size);
    avio_wb32(pb, field_nb);
    avio_w8(pb, 1); /* flags */
    avio_w8(pb, 0); /* reserved */
    return 16;
}
Exemple #9
0
/* send an rtcp sender report packet */
static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time, int bye)
{
    RTPMuxContext *s = s1->priv_data;
    uint32_t rtp_ts;

    av_log(s1, AV_LOG_TRACE, "RTCP: %02x %"PRIx64" %x\n", s->payload_type, ntp_time, s->timestamp);

    s->last_rtcp_ntp_time = ntp_time;
    rtp_ts = av_rescale_q(ntp_time - s->first_rtcp_ntp_time, (AVRational){1, 1000000},
                          s1->streams[0]->time_base) + s->base_timestamp;
    avio_w8(s1->pb, RTP_VERSION << 6);
    avio_w8(s1->pb, RTCP_SR);
    avio_wb16(s1->pb, 6); /* length in words - 1 */
    avio_wb32(s1->pb, s->ssrc);
    avio_wb32(s1->pb, ntp_time / 1000000);
    avio_wb32(s1->pb, ((ntp_time % 1000000) << 32) / 1000000);
    avio_wb32(s1->pb, rtp_ts);
    avio_wb32(s1->pb, s->packet_count);
    avio_wb32(s1->pb, s->octet_count);

    if (s->cname) {
        int len = FFMIN(strlen(s->cname), 255);
        avio_w8(s1->pb, (RTP_VERSION << 6) + 1);
        avio_w8(s1->pb, RTCP_SDES);
        avio_wb16(s1->pb, (7 + len + 3) / 4); /* length in words - 1 */

        avio_wb32(s1->pb, s->ssrc);
        avio_w8(s1->pb, 0x01); /* CNAME */
        avio_w8(s1->pb, len);
        avio_write(s1->pb, s->cname, len);
        avio_w8(s1->pb, 0); /* END */
        for (len = (7 + len) % 4; len % 4; len++)
            avio_w8(s1->pb, 0);
    }

    if (bye) {
        avio_w8(s1->pb, (RTP_VERSION << 6) | 1);
        avio_w8(s1->pb, RTCP_BYE);
        avio_wb16(s1->pb, 1); /* length in words - 1 */
        avio_wb32(s1->pb, s->ssrc);
    }

    avio_flush(s1->pb);
}
Exemple #10
0
static int64_t updateSize(AVIOContext *pb, int64_t pos)
{
    int64_t curpos;

    curpos = avio_tell(pb);
    avio_seek(pb, pos, SEEK_SET);
    avio_wb16(pb, curpos - pos - 2);
    avio_seek(pb, curpos, SEEK_SET);
    return curpos - pos;
}
Exemple #11
0
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
                                int length, int key_frame)
{
    int timestamp;
    AVIOContext *s = ctx->pb;

    stream->nb_packets++;
    stream->packet_total_size += length;
    if (length > stream->packet_max_size)
        stream->packet_max_size =  length;

    avio_wb16(s,0); /* version */
    avio_wb16(s,length + 12);
    avio_wb16(s, stream->num); /* stream number */
    timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
    avio_wb32(s, timestamp); /* timestamp */
    avio_w8(s, 0); /* reserved */
    avio_w8(s, key_frame ? 2 : 0); /* flags */
}
Exemple #12
0
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
                                int length, int key_frame)
{
    int timestamp;
    AVIOContext *s = ctx->pb;

    stream->nb_packets++;
    stream->packet_total_size += length;
    if (length > stream->packet_max_size)
        stream->packet_max_size =  length;

    avio_wb16(s,0); /* version */
    avio_wb16(s,length + 12);
    avio_wb16(s, stream->num); /* stream number */
    timestamp = av_rescale_q_rnd(stream->nb_frames, (AVRational){1000, 1}, stream->frame_rate, AV_ROUND_ZERO);
    avio_wb32(s, timestamp); /* timestamp */
    avio_w8(s, 0); /* reserved */
    avio_w8(s, key_frame ? 2 : 0); /* flags */
}
Exemple #13
0
static int rso_write_header(AVFormatContext *s)
{
    AVIOContext  *pb  = s->pb;
    AVCodecParameters *par = s->streams[0]->codecpar;

    if (!par->codec_tag)
        return AVERROR_INVALIDDATA;

    if (par->channels != 1) {
        av_log(s, AV_LOG_ERROR, "RSO only supports mono\n");
        return AVERROR_INVALIDDATA;
    }

    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
        av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n");
        return AVERROR_INVALIDDATA;
    }

    /* XXX: find legal sample rates (if any) */
    if (par->sample_rate >= 1u<<16) {
        av_log(s, AV_LOG_ERROR, "Sample rate must be < 65536\n");
        return AVERROR_INVALIDDATA;
    }

    if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
        avpriv_report_missing_feature(s, "ADPCM in RSO");
        return AVERROR_PATCHWELCOME;
    }

    /* format header */
    avio_wb16(pb, par->codec_tag);   /* codec ID */
    avio_wb16(pb, 0);                /* data size, will be written at EOF */
    avio_wb16(pb, par->sample_rate);
    avio_wb16(pb, 0x0000);           /* play mode ? (0x0000 = don't loop) */

    avio_flush(pb);

    return 0;
}
Exemple #14
0
static int rso_write_header(AVFormatContext *s)
{
    AVIOContext  *pb  = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;

    if (!enc->codec_tag)
        return AVERROR_INVALIDDATA;

    if (enc->channels != 1) {
        av_log(s, AV_LOG_ERROR, "RSO only supports mono\n");
        return AVERROR_INVALIDDATA;
    }

    if (url_is_streamed(s->pb)) {
        av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n");
        return AVERROR_INVALIDDATA;
    }

    /* XXX: find legal sample rates (if any) */
    if (enc->sample_rate >= 1u<<16) {
        av_log(s, AV_LOG_ERROR, "Sample rate must be < 65536\n");
        return AVERROR_INVALIDDATA;
    }

    if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
        av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n");
        return AVERROR_PATCHWELCOME;
    }

    /* format header */
    avio_wb16(pb, enc->codec_tag);   /* codec ID */
    avio_wb16(pb, 0);                /* data size, will be written at EOF */
    avio_wb16(pb, enc->sample_rate);
    avio_wb16(pb, 0x0000);           /* play mode ? (0x0000 = don't loop) */

    avio_flush(pb);

    return 0;
}
Exemple #15
0
static int gxf_write_material_data_section(AVFormatContext *s)
{
    GXFContext *gxf = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t pos;
    int len;
    const char *filename = strrchr(s->filename, '/');

    pos = avio_tell(pb);
    avio_wb16(pb, 0); /* size */

    /* name */
    if (filename)
        filename++;
    else
        filename = s->filename;
    len = strlen(filename);

    avio_w8(pb, MAT_NAME);
    avio_w8(pb, strlen(SERVER_PATH) + len + 1);
    avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
    avio_write(pb, filename, len);
    avio_w8(pb, 0);

    /* first field */
    avio_w8(pb, MAT_FIRST_FIELD);
    avio_w8(pb, 4);
    avio_wb32(pb, 0);

    /* last field */
    avio_w8(pb, MAT_LAST_FIELD);
    avio_w8(pb, 4);
    avio_wb32(pb, gxf->nb_fields);

    /* reserved */
    avio_w8(pb, MAT_MARK_IN);
    avio_w8(pb, 4);
    avio_wb32(pb, 0);

    avio_w8(pb, MAT_MARK_OUT);
    avio_w8(pb, 4);
    avio_wb32(pb, gxf->nb_fields);

    /* estimated size */
    avio_w8(pb, MAT_SIZE);
    avio_w8(pb, 4);
    avio_wb32(pb, avio_size(pb) / 1024);

    return updateSize(pb, pos);
}
Exemple #16
0
void rtp_send_punch_packets(URLContext* rtp_handle)
{
    AVIOContext *pb;
    uint8_t *buf;
    int len;

    /* Send a small RTP packet */
    if (url_open_dyn_buf(&pb) < 0)
        return;

    avio_w8(pb, (RTP_VERSION << 6));
    avio_w8(pb, 0); /* Payload type */
    avio_wb16(pb, 0); /* Seq */
    avio_wb32(pb, 0); /* Timestamp */
    avio_wb32(pb, 0); /* SSRC */

    avio_flush(pb);
    len = url_close_dyn_buf(pb, &buf);
    if ((len > 0) && buf)
        url_write(rtp_handle, buf, len);
    av_free(buf);

    /* Send a minimal RTCP RR */
    if (url_open_dyn_buf(&pb) < 0)
        return;

    avio_w8(pb, (RTP_VERSION << 6));
    avio_w8(pb, RTCP_RR); /* receiver report */
    avio_wb16(pb, 1); /* length in words - 1 */
    avio_wb32(pb, 0); /* our own SSRC */

    avio_flush(pb);
    len = url_close_dyn_buf(pb, &buf);
    if ((len > 0) && buf)
        url_write(rtp_handle, buf, len);
    av_free(buf);
}
Exemple #17
0
static int gxf_write_track_description_section(AVFormatContext *s)
{
    GXFContext *gxf = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t pos;
    int i;

    pos = avio_tell(pb);
    avio_wb16(pb, 0); /* size */
    for (i = 0; i < s->nb_streams; ++i)
        gxf_write_track_description(s, s->streams[i]->priv_data, i);

    gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);

    return updateSize(pb, pos);
}
Exemple #18
0
/* send an rtp packet. sequence number is incremented, but the caller
   must update the timestamp itself */
void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m)
{
    RTPMuxContext *s = s1->priv_data;

    av_log(s1, AV_LOG_TRACE, "rtp_send_data size=%d\n", len);

    /* build the RTP header */
    avio_w8(s1->pb, RTP_VERSION << 6);
    avio_w8(s1->pb, (s->payload_type & 0x7f) | ((m & 0x01) << 7));
    avio_wb16(s1->pb, s->seq);
    avio_wb32(s1->pb, s->timestamp);
    avio_wb32(s1->pb, s->ssrc);

    avio_write(s1->pb, buf1, len);
    avio_flush(s1->pb);

    s->seq = (s->seq + 1) & 0xffff;
    s->octet_count += len;
    s->packet_count++;
}
Exemple #19
0
/* send an rtcp sender report packet */
static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
{
    RTPMuxContext *s = s1->priv_data;
    uint32_t rtp_ts;

    av_dlog(s1, "RTCP: %02x %"PRIx64" %x\n", s->payload_type, ntp_time, s->timestamp);

    s->last_rtcp_ntp_time = ntp_time;
    rtp_ts = av_rescale_q(ntp_time - s->first_rtcp_ntp_time, (AVRational){1, 1000000},
                          s1->streams[0]->time_base) + s->base_timestamp;
    avio_w8(s1->pb, (RTP_VERSION << 6));
    avio_w8(s1->pb, RTCP_SR);
    avio_wb16(s1->pb, 6); /* length in words - 1 */
    avio_wb32(s1->pb, s->ssrc);
    avio_wb32(s1->pb, ntp_time / 1000000);
    avio_wb32(s1->pb, ((ntp_time % 1000000) << 32) / 1000000);
    avio_wb32(s1->pb, rtp_ts);
    avio_wb32(s1->pb, s->packet_count);
    avio_wb32(s1->pb, s->octet_count);
    avio_flush(s1->pb);
}
Exemple #20
0
int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
                       AVCodecParameters *par)
{
    VPCC vpcc;
    int ret;

    ret = ff_isom_get_vpcc_features(s, par, NULL, &vpcc);
    if (ret < 0)
        return ret;

    avio_w8(pb, vpcc.profile);
    avio_w8(pb, vpcc.level);
    avio_w8(pb, (vpcc.bitdepth << 4) | (vpcc.chroma_subsampling << 1) | vpcc.full_range_flag);
    avio_w8(pb, par->color_primaries);
    avio_w8(pb, par->color_trc);
    avio_w8(pb, par->color_space);

    // vp9 does not have codec initialization data.
    avio_wb16(pb, 0);
    return 0;
}
Exemple #21
0
static int write_trailer(AVFormatContext *s)
{
    FilmstripMuxContext *film = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *st = s->streams[0];
    int i;

    avio_wb32(pb, RAND_TAG);
    avio_wb32(pb, film->nb_frames);
    avio_wb16(pb, 0);  // packing method
    avio_wb16(pb, 0);  // reserved
    avio_wb16(pb, st->codec->width);
    avio_wb16(pb, st->codec->height);
    avio_wb16(pb, 0);  // leading
    avio_wb16(pb, 1/av_q2d(st->codec->time_base));
    for (i = 0; i < 16; i++)
        avio_w8(pb, 0x00);  // reserved
    avio_flush(pb);
    return 0;
}
Exemple #22
0
static int write_trailer(AVFormatContext *s)
{
    FilmstripMuxContext *film = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *st = s->streams[0];
    int i;

    avio_wb32(pb, RAND_TAG);
    avio_wb32(pb, film->nb_frames);
    avio_wb16(pb, 0);  // packing method
    avio_wb16(pb, 0);  // reserved
    avio_wb16(pb, st->codec->width);
    avio_wb16(pb, st->codec->height);
    avio_wb16(pb, 0);  // leading
    // TODO: should be avg_frame_rate
    avio_wb16(pb, st->time_base.den / st->time_base.num);
    for (i = 0; i < 16; i++)
        avio_w8(pb, 0x00);  // reserved

    return 0;
}
Exemple #23
0
int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
{
    AVIOContext *pb;
    uint8_t *buf;
    int len;
    int rtcp_bytes;
    RTPStatistics *stats= &s->statistics;
    uint32_t lost;
    uint32_t extended_max;
    uint32_t expected_interval;
    uint32_t received_interval;
    uint32_t lost_interval;
    uint32_t expected;
    uint32_t fraction;
    uint64_t ntp_time= s->last_rtcp_ntp_time; // TODO: Get local ntp time?

    if (!s->rtp_ctx || (count < 1))
        return -1;

    /* TODO: I think this is way too often; RFC 1889 has algorithm for this */
    /* XXX: mpeg pts hardcoded. RTCP send every 0.5 seconds */
    s->octet_count += count;
    rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
        RTCP_TX_RATIO_DEN;
    rtcp_bytes /= 50; // mmu_man: that's enough for me... VLC sends much less btw !?
    if (rtcp_bytes < 28)
        return -1;
    s->last_octet_count = s->octet_count;

    if (url_open_dyn_buf(&pb) < 0)
        return -1;

    // Receiver Report
    avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
    avio_w8(pb, RTCP_RR);
    avio_wb16(pb, 7); /* length in words - 1 */
    // our own SSRC: we use the server's SSRC + 1 to avoid conflicts
    avio_wb32(pb, s->ssrc + 1);
    avio_wb32(pb, s->ssrc); // server SSRC
    // some placeholders we should really fill...
    // RFC 1889/p64
    extended_max= stats->cycles + stats->max_seq;
    expected= extended_max - stats->base_seq + 1;
    lost= expected - stats->received;
    lost= FFMIN(lost, 0xffffff); // clamp it since it's only 24 bits...
    expected_interval= expected - stats->expected_prior;
    stats->expected_prior= expected;
    received_interval= stats->received - stats->received_prior;
    stats->received_prior= stats->received;
    lost_interval= expected_interval - received_interval;
    if (expected_interval==0 || lost_interval<=0) fraction= 0;
    else fraction = (lost_interval<<8)/expected_interval;

    fraction= (fraction<<24) | lost;

    avio_wb32(pb, fraction); /* 8 bits of fraction, 24 bits of total packets lost */
    avio_wb32(pb, extended_max); /* max sequence received */
    avio_wb32(pb, stats->jitter>>4); /* jitter */

    if(s->last_rtcp_ntp_time==AV_NOPTS_VALUE)
    {
        avio_wb32(pb, 0); /* last SR timestamp */
        avio_wb32(pb, 0); /* delay since last SR */
    } else {
        uint32_t middle_32_bits= s->last_rtcp_ntp_time>>16; // this is valid, right? do we need to handle 64 bit values special?
        uint32_t delay_since_last= ntp_time - s->last_rtcp_ntp_time;

        avio_wb32(pb, middle_32_bits); /* last SR timestamp */
        avio_wb32(pb, delay_since_last); /* delay since last SR */
    }

    // CNAME
    avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
    avio_w8(pb, RTCP_SDES);
    len = strlen(s->hostname);
    avio_wb16(pb, (6 + len + 3) / 4); /* length in words - 1 */
    avio_wb32(pb, s->ssrc);
    avio_w8(pb, 0x01);
    avio_w8(pb, len);
    avio_write(pb, s->hostname, len);
    // padding
    for (len = (6 + len) % 4; len % 4; len++) {
        avio_w8(pb, 0);
    }

    avio_flush(pb);
    len = url_close_dyn_buf(pb, &buf);
    if ((len > 0) && buf) {
        int result;
        av_dlog(s->ic, "sending %d bytes of RR\n", len);
        result= url_write(s->rtp_ctx, buf, len);
        av_dlog(s->ic, "result from url_write: %d\n", result);
        av_free(buf);
    }
    return 0;
}
Exemple #24
0
/**
 * Write an RTP hint (that may contain one or more RTP packets)
 * for the packets in data. data contains one or more packets with a
 * BE32 size header.
 *
 * @param out buffer where the hints are written
 * @param data buffer containing RTP packets
 * @param size the size of the data buffer
 * @param trk the MOVTrack for the hint track
 * @param dts pointer where the timestamp for the written RTP hint is stored
 * @return the number of RTP packets in the written hint
 */
static int write_hint_packets(AVIOContext *out, const uint8_t *data,
                              int size, MOVTrack *trk, int64_t *dts)
{
    int64_t curpos;
    int64_t count_pos, entries_pos;
    int count = 0, entries;

    count_pos = avio_tell(out);
    /* RTPsample header */
    avio_wb16(out, 0); /* packet count */
    avio_wb16(out, 0); /* reserved */

    while (size > 4) {
        uint32_t packet_len = AV_RB32(data);
        uint16_t seq;
        uint32_t ts;
        int32_t  ts_diff;

        data += 4;
        size -= 4;
        if (packet_len > size || packet_len <= 12)
            break;
        if (RTP_PT_IS_RTCP(data[1])) {
            /* RTCP packet, just skip */
            data += packet_len;
            size -= packet_len;
            continue;
        }

        if (packet_len > trk->max_packet_size)
            trk->max_packet_size = packet_len;

        seq = AV_RB16(&data[2]);
        ts  = AV_RB32(&data[4]);

        if (trk->prev_rtp_ts == 0)
            trk->prev_rtp_ts = ts;
        /* Unwrap the 32-bit RTP timestamp that wraps around often
         * into a not (as often) wrapping 64-bit timestamp. */
        ts_diff = ts - trk->prev_rtp_ts;
        if (ts_diff > 0) {
            trk->cur_rtp_ts_unwrapped += ts_diff;
            trk->prev_rtp_ts = ts;
            ts_diff = 0;
        }
        if (*dts == AV_NOPTS_VALUE)
            *dts = trk->cur_rtp_ts_unwrapped;

        count++;
        /* RTPpacket header */
        avio_wb32(out, 0); /* relative_time */
        avio_write(out, data, 2); /* RTP header */
        avio_wb16(out, seq); /* RTPsequenceseed */
        avio_wb16(out, ts_diff ? 4 : 0); /* reserved + flags (extra_flag) */
        entries_pos = avio_tell(out);
        avio_wb16(out, 0); /* entry count */
        if (ts_diff) { /* if extra_flag is set */
            avio_wb32(out, 16); /* extra_information_length */
            avio_wb32(out, 12); /* rtpoffsetTLV box */
            avio_write(out, "rtpo", 4);
            avio_wb32(out, ts_diff);
        }

        data += 12;
        size -= 12;
        packet_len -= 12;

        entries = 0;
        /* Write one or more constructors describing the payload data */
        describe_payload(data, packet_len, out, &entries, &trk->sample_queue);
        data += packet_len;
        size -= packet_len;

        curpos = avio_tell(out);
        avio_seek(out, entries_pos, SEEK_SET);
        avio_wb16(out, entries);
        avio_seek(out, curpos, SEEK_SET);
    }

    curpos = avio_tell(out);
    avio_seek(out, count_pos, SEEK_SET);
    avio_wb16(out, count);
    avio_seek(out, curpos, SEEK_SET);
    return count;
}
Exemple #25
0
static int rv10_write_header(AVFormatContext *ctx,
                             int data_size, int index_pos)
{
    RMMuxContext *rm = ctx->priv_data;
    AVIOContext *s = ctx->pb;
    StreamInfo *stream;
    unsigned char *data_offset_ptr, *start_ptr;
    const char *desc, *mimetype;
    int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
    int bit_rate, v, duration, flags, data_pos;
    AVDictionaryEntry *tag;

    start_ptr = s->buf_ptr;

    ffio_wfourcc(s, ".RMF");
    avio_wb32(s,18); /* header size */
    avio_wb16(s,0);
    avio_wb32(s,0);
    avio_wb32(s,4 + ctx->nb_streams); /* num headers */

    ffio_wfourcc(s,"PROP");
    avio_wb32(s, 50);
    avio_wb16(s, 0);
    packet_max_size = 0;
    packet_total_size = 0;
    nb_packets = 0;
    bit_rate = 0;
    duration = 0;
    for(i=0;i<ctx->nb_streams;i++) {
        StreamInfo *stream = &rm->streams[i];
        bit_rate += stream->bit_rate;
        if (stream->packet_max_size > packet_max_size)
            packet_max_size = stream->packet_max_size;
        nb_packets += stream->nb_packets;
        packet_total_size += stream->packet_total_size;
        /* select maximum duration */
        v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
        if (v > duration)
            duration = v;
    }
    avio_wb32(s, bit_rate); /* max bit rate */
    avio_wb32(s, bit_rate); /* avg bit rate */
    avio_wb32(s, packet_max_size);        /* max packet size */
    if (nb_packets > 0)
        packet_avg_size = packet_total_size / nb_packets;
    else
        packet_avg_size = 0;
    avio_wb32(s, packet_avg_size);        /* avg packet size */
    avio_wb32(s, nb_packets);  /* num packets */
    avio_wb32(s, duration); /* duration */
    avio_wb32(s, BUFFER_DURATION);           /* preroll */
    avio_wb32(s, index_pos);           /* index offset */
    /* computation of data the data offset */
    data_offset_ptr = s->buf_ptr;
    avio_wb32(s, 0);           /* data offset : will be patched after */
    avio_wb16(s, ctx->nb_streams);    /* num streams */
    flags = 1 | 2; /* save allowed & perfect play */
    if (!s->seekable)
        flags |= 4; /* live broadcast */
    avio_wb16(s, flags);

    /* comments */

    ffio_wfourcc(s,"CONT");
    size =  4 * 2 + 10;
    for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
        tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0);
        if(tag) size += strlen(tag->value);
    }
    avio_wb32(s,size);
    avio_wb16(s,0);
    for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
        tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0);
        put_str(s, tag ? tag->value : "");
    }

    for(i=0;i<ctx->nb_streams;i++) {
        int codec_data_size;

        stream = &rm->streams[i];

        if (stream->enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            desc = "The Audio Stream";
            mimetype = "audio/x-pn-realaudio";
            codec_data_size = 73;
        } else {
            desc = "The Video Stream";
            mimetype = "video/x-pn-realvideo";
            codec_data_size = 34;
        }

        ffio_wfourcc(s,"MDPR");
        size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
        avio_wb32(s, size);
        avio_wb16(s, 0);

        avio_wb16(s, i); /* stream number */
        avio_wb32(s, stream->bit_rate); /* max bit rate */
        avio_wb32(s, stream->bit_rate); /* avg bit rate */
        avio_wb32(s, stream->packet_max_size);        /* max packet size */
        if (stream->nb_packets > 0)
            packet_avg_size = stream->packet_total_size /
                stream->nb_packets;
        else
            packet_avg_size = 0;
        avio_wb32(s, packet_avg_size);        /* avg packet size */
        avio_wb32(s, 0);           /* start time */
        avio_wb32(s, BUFFER_DURATION);           /* preroll */
        /* duration */
        if (!s->seekable || !stream->total_frames)
            avio_wb32(s, (int)(3600 * 1000));
        else
            avio_wb32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
        put_str8(s, desc);
        put_str8(s, mimetype);
        avio_wb32(s, codec_data_size);

        if (stream->enc->codec_type == AVMEDIA_TYPE_AUDIO) {
            int coded_frame_size, fscode, sample_rate;
            sample_rate = stream->enc->sample_rate;
            coded_frame_size = (stream->enc->bit_rate *
                                stream->enc->frame_size) / (8 * sample_rate);
            /* audio codec info */
            avio_write(s, ".ra", 3);
            avio_w8(s, 0xfd);
            avio_wb32(s, 0x00040000); /* version */
            ffio_wfourcc(s, ".ra4");
            avio_wb32(s, 0x01b53530); /* stream length */
            avio_wb16(s, 4); /* unknown */
            avio_wb32(s, 0x39); /* header size */

            switch(sample_rate) {
            case 48000:
            case 24000:
            case 12000:
                fscode = 1;
                break;
            default:
            case 44100:
            case 22050:
            case 11025:
                fscode = 2;
                break;
            case 32000:
            case 16000:
            case 8000:
                fscode = 3;
            }
            avio_wb16(s, fscode); /* codec additional info, for AC-3, seems
                                     to be a frequency code */
            /* special hack to compensate rounding errors... */
            if (coded_frame_size == 557)
                coded_frame_size--;
            avio_wb32(s, coded_frame_size); /* frame length */
            avio_wb32(s, 0x51540); /* unknown */
            avio_wb32(s, stream->enc->bit_rate / 8 * 60); /* bytes per minute */
            avio_wb32(s, stream->enc->bit_rate / 8 * 60); /* bytes per minute */
            avio_wb16(s, 0x01);
            /* frame length : seems to be very important */
            avio_wb16(s, coded_frame_size);
            avio_wb32(s, 0); /* unknown */
            avio_wb16(s, stream->enc->sample_rate); /* sample rate */
            avio_wb32(s, 0x10); /* unknown */
            avio_wb16(s, stream->enc->channels);
            put_str8(s, "Int0"); /* codec name */
            if (stream->enc->codec_tag) {
                avio_w8(s, 4); /* tag length */
                avio_wl32(s, stream->enc->codec_tag);
            } else {
                av_log(ctx, AV_LOG_ERROR, "Invalid codec tag\n");
                return -1;
            }
            avio_wb16(s, 0); /* title length */
            avio_wb16(s, 0); /* author length */
            avio_wb16(s, 0); /* copyright length */
            avio_w8(s, 0); /* end of header */
        } else {
            /* video codec info */
            avio_wb32(s,34); /* size */
            ffio_wfourcc(s, "VIDO");
            if(stream->enc->codec_id == AV_CODEC_ID_RV10)
                ffio_wfourcc(s,"RV10");
            else
                ffio_wfourcc(s,"RV20");
            avio_wb16(s, stream->enc->width);
            avio_wb16(s, stream->enc->height);
            avio_wb16(s, (int) stream->frame_rate); /* frames per seconds ? */
            avio_wb32(s,0);     /* unknown meaning */
            avio_wb16(s, (int) stream->frame_rate);  /* unknown meaning */
            avio_wb32(s,0);     /* unknown meaning */
            avio_wb16(s, 8);    /* unknown meaning */
            /* Seems to be the codec version: only use basic H263. The next
               versions seems to add a diffential DC coding as in
               MPEG... nothing new under the sun */
            if(stream->enc->codec_id == AV_CODEC_ID_RV10)
                avio_wb32(s,0x10000000);
            else
                avio_wb32(s,0x20103001);
            //avio_wb32(s,0x10003000);
        }
    }

    /* patch data offset field */
    data_pos = s->buf_ptr - start_ptr;
    rm->data_pos = data_pos;
    data_offset_ptr[0] = data_pos >> 24;
    data_offset_ptr[1] = data_pos >> 16;
    data_offset_ptr[2] = data_pos >> 8;
    data_offset_ptr[3] = data_pos;

    /* data stream */
    ffio_wfourcc(s, "DATA");
    avio_wb32(s,data_size + 10 + 8);
    avio_wb16(s,0);

    avio_wb32(s, nb_packets); /* number of packets */
    avio_wb32(s,0); /* next data header */
    return 0;
}
Exemple #26
0
const int isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
{
    // extradata from bytestream h264, convert to avcC atom data for bitstream
    if (len > 6)
    {
        /* check for h264 start code */
        if (VDA_RB32(data) == 0x00000001 || VDA_RB24(data) == 0x000001)
        {
            uint8_t *buf=NULL, *end, *start;
            uint32_t sps_size=0, pps_size=0;
            uint8_t *sps=0, *pps=0;

            int ret = avc_parse_nal_units_buf(data, &buf, &len);
            if (ret < 0)
                return ret;
            start = buf;
            end = buf + len;

            /* look for sps and pps */
            while (buf < end)
            {
                unsigned int size;
                uint8_t nal_type;
                size = VDA_RB32(buf);
                nal_type = buf[4] & 0x1f;
                if (nal_type == 7) /* SPS */
                {
                    sps = buf + 4;
                    sps_size = size;

                    //parse_sps(sps+1, sps_size-1);
                }
                else if (nal_type == 8) /* PPS */
                {
                    pps = buf + 4;
                    pps_size = size;
                }
                buf += size + 4;
            }
            if (!sps)
            {
                LOG(VB_GENERAL, LOG_ERR, LOC + "Invalid data (sps)");
                return -1;
            }

            avio_w8(pb, 1); /* version */
            avio_w8(pb, sps[1]); /* profile */
            avio_w8(pb, sps[2]); /* profile compat */
            avio_w8(pb, sps[3]); /* level */
            avio_w8(pb, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 1 (11) */
            avio_w8(pb, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */

            avio_wb16(pb, sps_size);
            avio_write(pb, sps, sps_size);
            if (pps)
            {
                avio_w8(pb, 1); /* number of pps */
                avio_wb16(pb, pps_size);
                avio_write(pb, pps, pps_size);
            }
            av_free(start);
        }
        else
        {
            avio_write(pb, data, len);
        }
    }
    return 0;
}
Exemple #27
0
static int aiff_write_header(AVFormatContext *s)
{
    AIFFOutputContext *aiff = s->priv_data;
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;
    AVExtFloat 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_dbl2ext((double)enc->sample_rate);
    avio_write(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));

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

    /* 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;
}
Exemple #28
0
/*
 * Write an empty XING header and initialize respective data.
 */
static void mp3_write_xing(AVFormatContext *s)
{
    MP3Context       *mp3 = s->priv_data;
    AVCodecContext *codec = s->streams[mp3->audio_stream_idx]->codec;
    AVDictionaryEntry *enc = av_dict_get(s->streams[mp3->audio_stream_idx]->metadata, "encoder", NULL, 0);
    AVIOContext *dyn_ctx;
    int32_t        header;
    MPADecodeHeader  mpah;
    int srate_idx, i, channels;
    int bitrate_idx;
    int best_bitrate_idx;
    int best_bitrate_error = INT_MAX;
    int ret;
    int ver = 0;
    int lsf, bytes_needed;

    if (!s->pb->seekable || !mp3->write_xing)
        return;

    for (i = 0; i < FF_ARRAY_ELEMS(avpriv_mpa_freq_tab); i++) {
        const uint16_t base_freq = avpriv_mpa_freq_tab[i];

        if      (codec->sample_rate == base_freq)     ver = 0x3; // MPEG 1
        else if (codec->sample_rate == base_freq / 2) ver = 0x2; // MPEG 2
        else if (codec->sample_rate == base_freq / 4) ver = 0x0; // MPEG 2.5
        else continue;

        srate_idx = i;
        break;
    }
    if (i == FF_ARRAY_ELEMS(avpriv_mpa_freq_tab)) {
        av_log(s, AV_LOG_WARNING, "Unsupported sample rate, not writing Xing "
               "header.\n");
        return;
    }

    switch (codec->channels) {
    case 1:  channels = MPA_MONO;                                          break;
    case 2:  channels = MPA_STEREO;                                        break;
    default: av_log(s, AV_LOG_WARNING, "Unsupported number of channels, "
                    "not writing Xing header.\n");
             return;
    }

    /* dummy MPEG audio header */
    header  =  0xff                                  << 24; // sync
    header |= (0x7 << 5 | ver << 3 | 0x1 << 1 | 0x1) << 16; // sync/audio-version/layer 3/no crc*/
    header |= (srate_idx << 2) << 8;
    header |= channels << 6;

    lsf = !((header & (1 << 20) && header & (1 << 19)));

    mp3->xing_offset = xing_offtbl[ver != 3][channels == 1] + 4;
    bytes_needed     = mp3->xing_offset + XING_SIZE;

    for (bitrate_idx = 1; bitrate_idx < 15; bitrate_idx++) {
        int bit_rate = 1000 * avpriv_mpa_bitrate_tab[lsf][3 - 1][bitrate_idx];
        int error    = FFABS(bit_rate - codec->bit_rate);

        if (error < best_bitrate_error){
            best_bitrate_error = error;
            best_bitrate_idx   = bitrate_idx;
        }
    }

    for (bitrate_idx = best_bitrate_idx; bitrate_idx < 15; bitrate_idx++) {
        int32_t mask = bitrate_idx << (4 + 8);
        header |= mask;

        avpriv_mpegaudio_decode_header(&mpah, header);

        if (bytes_needed <= mpah.frame_size)
            break;

        header &= ~mask;
    }

    ret = avio_open_dyn_buf(&dyn_ctx);
    if (ret < 0)
        return;

    avio_wb32(dyn_ctx, header);

    avpriv_mpegaudio_decode_header(&mpah, header);

    av_assert0(mpah.frame_size >= bytes_needed);

    ffio_fill(dyn_ctx, 0, mp3->xing_offset - 4);
    ffio_wfourcc(dyn_ctx, "Xing");
    avio_wb32(dyn_ctx, 0x01 | 0x02 | 0x04 | 0x08);  // frames / size / TOC / vbr scale

    mp3->size = mpah.frame_size;
    mp3->want = 1;

    avio_wb32(dyn_ctx, 0);  // frames
    avio_wb32(dyn_ctx, 0);  // size

    // TOC
    for (i = 0; i < XING_TOC_SIZE; i++)
        avio_w8(dyn_ctx, 255 * i / XING_TOC_SIZE);

    // vbr quality
    // we write it, because some (broken) tools always expect it to be present
    avio_wb32(dyn_ctx, 0);

    // encoder short version string
    if (enc) {
        uint8_t encoder_str[9] = { 0 };
        memcpy(encoder_str, enc->value, FFMIN(strlen(enc->value), sizeof(encoder_str)));
        avio_write(dyn_ctx, encoder_str, sizeof(encoder_str));
    } else
        ffio_fill(dyn_ctx, 0, 9);

    avio_w8(dyn_ctx, 0);      // tag revision 0 / unknown vbr method
    avio_w8(dyn_ctx, 0);      // unknown lowpass filter value
    ffio_fill(dyn_ctx, 0, 8); // empty replaygain fields
    avio_w8(dyn_ctx, 0);      // unknown encoding flags
    avio_w8(dyn_ctx, 0);      // unknown abr/minimal bitrate

    // encoder delay
    if (codec->initial_padding >= 1 << 12) {
        av_log(s, AV_LOG_WARNING, "Too many samples of initial padding.\n");
        avio_wb24(dyn_ctx, 0);
    } else {
        avio_wb24(dyn_ctx, codec->initial_padding << 12);
    }

    avio_w8(dyn_ctx,   0); // misc
    avio_w8(dyn_ctx,   0); // mp3gain
    avio_wb16(dyn_ctx, 0); // preset

    // audio length and CRCs (will be updated later)
    avio_wb32(dyn_ctx, 0); // music length
    avio_wb16(dyn_ctx, 0); // music crc
    avio_wb16(dyn_ctx, 0); // tag crc

    ffio_fill(dyn_ctx, 0, mpah.frame_size - bytes_needed);

    mp3->xing_frame_size   = avio_close_dyn_buf(dyn_ctx, &mp3->xing_frame);
    mp3->xing_frame_offset = avio_tell(s->pb);
    avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);

    mp3->audio_size = mp3->xing_frame_size;
}
Exemple #29
0
static void put_amf_string(AVIOContext *pb, const char *str)
{
    size_t len = strlen(str);
    avio_wb16(pb, len);
    avio_write(pb, str, len);
}
Exemple #30
0
static int gxf_write_umf_media_description(AVFormatContext *s)
{
    GXFContext *gxf = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t pos;
    int i, j;

    pos = avio_tell(pb);
    gxf->umf_media_offset = pos - gxf->umf_start_offset;
    for (i = 0; i <= s->nb_streams; ++i) {
        GXFStreamContext *sc;
        int64_t startpos, curpos;

        if (i == s->nb_streams)
            sc = &gxf->timecode_track;
        else
            sc = s->streams[i]->priv_data;

        startpos = avio_tell(pb);
        avio_wl16(pb, 0); /* length */
        avio_wl16(pb, sc->media_info);
        avio_wl16(pb, 0); /* reserved */
        avio_wl16(pb, 0); /* reserved */
        avio_wl32(pb, gxf->nb_fields);
        avio_wl32(pb, 0); /* attributes rw, ro */
        avio_wl32(pb, 0); /* mark in */
        avio_wl32(pb, gxf->nb_fields); /* mark out */
        avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
        avio_wb16(pb, sc->media_info);
        for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
            avio_w8(pb, 0);
        avio_wl32(pb, sc->track_type);
        avio_wl32(pb, sc->sample_rate);
        avio_wl32(pb, sc->sample_size);
        avio_wl32(pb, 0); /* reserved */

        if (sc == &gxf->timecode_track)
            gxf_write_umf_media_timecode(pb, gxf->tc.drop);
        else {
            AVStream *st = s->streams[i];
            switch (st->codec->codec_id) {
            case CODEC_ID_MPEG1VIDEO:
            case CODEC_ID_MPEG2VIDEO:
                gxf_write_umf_media_mpeg(pb, st);
                break;
            case CODEC_ID_PCM_S16LE:
                gxf_write_umf_media_audio(pb, sc);
                break;
            case CODEC_ID_DVVIDEO:
                gxf_write_umf_media_dv(pb, sc);
                break;
            }
        }

        curpos = avio_tell(pb);
        avio_seek(pb, startpos, SEEK_SET);
        avio_wl16(pb, curpos - startpos);
        avio_seek(pb, curpos, SEEK_SET);
    }
    return avio_tell(pb) - pos;
}