static int gxf_write_umf_media_description(AVFormatContext *s)
{
GXFContext *gxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t pos;
int i, j;
pos = url_ftell(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 = url_ftell(pb);
put_le16(pb, 0); /* length */
put_le16(pb, sc->media_info);
put_le16(pb, 0); /* reserved */
put_le16(pb, 0); /* reserved */
put_le32(pb, gxf->nb_fields);
put_le32(pb, 0); /* attributes rw, ro */
put_le32(pb, 0); /* mark in */
put_le32(pb, gxf->nb_fields); /* mark out */
put_buffer(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
put_be16(pb, sc->media_info);
for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
put_byte(pb, 0);
put_le32(pb, sc->track_type);
put_le32(pb, sc->sample_rate);
put_le32(pb, sc->sample_size);
put_le32(pb, 0); /* reserved */
if (sc == &gxf->timecode_track)
gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
else {
AVStream *st = s->streams[i];
switch (st->codec->codec_id) {
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 = url_ftell(pb);
url_fseek(pb, startpos, SEEK_SET);
put_le16(pb, curpos - startpos);
url_fseek(pb, curpos, SEEK_SET);
}
return url_ftell(pb) - pos;
}
static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
{
int64_t pos;
int i;
pos = url_ftell(pb);
ctx->umf_media_offset = pos - ctx->umf_start_offset;
for (i = 0; i < ctx->fc->nb_streams; ++i) {
GXFStreamContext *sc = &ctx->streams[i];
char buffer[88];
int64_t startpos, curpos;
int path_size = strlen(ES_NAME_PATTERN);
memset(buffer, 0, 88);
startpos = url_ftell(pb);
put_le16(pb, 0); /* length */
put_le16(pb, sc->media_info);
put_le16(pb, 0); /* reserved */
put_le16(pb, 0); /* reserved */
put_le32(pb, ctx->nb_frames);
put_le32(pb, 0); /* attributes rw, ro */
put_le32(pb, 0); /* mark in */
put_le32(pb, ctx->nb_frames); /* mark out */
strncpy(buffer, ES_NAME_PATTERN, path_size);
put_buffer(pb, (uint8_t *)buffer, path_size);
put_be16(pb, sc->media_info);
put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
put_le32(pb, sc->track_type);
put_le32(pb, sc->sample_rate);
put_le32(pb, sc->sample_size);
put_le32(pb, 0); /* reserved */
switch (sc->codec->codec_id) {
case CODEC_ID_MPEG2VIDEO:
gxf_write_umf_media_mpeg(pb, sc);
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;
default:
gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
}
curpos = url_ftell(pb);
url_fseek(pb, startpos, SEEK_SET);
put_le16(pb, curpos - startpos);
url_fseek(pb, curpos, SEEK_SET);
}
return url_ftell(pb) - pos;
}
