int quicktime_find_acodec(quicktime_audio_map_t *atrack)
{
int i;
char *compressor = atrack->track->mdia.minf.stbl.stsd.table[0].format;
int compression_id = atrack->track->mdia.minf.stbl.stsd.table[0].compression_id;
quicktime_codec_t *codec_base = (quicktime_codec_t*)atrack->codec;
int32_t compressor_int = *(int32_t*)compressor;
if(!total_acodecs) register_acodecs();
for(i = 0; i < total_acodecs; i++)
{
quicktime_codectable_t *table = &acodecs[i];
table->init_acodec(atrack);
// For writing and reading Quicktime
if(quicktime_match_32(compressor, codec_base->fourcc))
return 0;
else
// For reading AVI, sometimes the fourcc is 0 and the compression_id is used instead.
// Sometimes the compression_id is the fourcc.
if((compressor[0] == 0 || compressor_int == codec_base->wav_id) &&
codec_base->wav_id == compression_id)
{
quicktime_copy_char32(compressor, codec_base->fourcc);
return 0;
}
else
{
codec_base->delete_acodec(atrack);
codec_base->priv = 0;
}
}
return -1;
}
int quicktime_stsd_init_hint(quicktime_t *file,
quicktime_stsd_t *stsd,
int maxPktSize,
int timeScale)
{
quicktime_stsd_table_t *table;
quicktime_stsd_init_table(stsd);
table = &(stsd->table[0]);
quicktime_copy_char32(table->format, "rtp ");
table->version = 1;
table->revision = 1;
table->maxPktSize = maxPktSize;
table->tims.timeScale = timeScale;
return 0;
}
int quicktime_stsd_init_audio(quicktime_t *file,
quicktime_stsd_t *stsd,
int channels,
int sample_rate,
int bits,
char *compressor)
{
quicktime_stsd_table_t *table;
quicktime_stsd_init_table(stsd);
table = &(stsd->table[0]);
quicktime_copy_char32(table->format, compressor);
table->channels = channels;
table->sample_size = bits;
table->sample_rate = sample_rate;
return 0;
}
int quicktime_stsd_init_video(quicktime_t *file,
quicktime_stsd_t *stsd,
int frame_w,
int frame_h,
float frame_rate,
char *compression)
{
quicktime_stsd_table_t *table;
quicktime_stsd_init_table(stsd);
table = &(stsd->table[0]);
quicktime_copy_char32(table->format, compression);
table->width = frame_w;
table->height = frame_h;
table->frames_per_sample = 1;
table->depth = 24;
table->ctab_id = 65535;
return 0;
}
