int quicktime_set_audio(quicktime_t *file,
int channels,
long sample_rate,
int bits,
char *compressor)
{
quicktime_trak_t *trak;
/* allocate an arbitrary number of tracks */
if(channels)
{
/* Fake the bits parameter for some formats. */
if(quicktime_match_32(compressor, QUICKTIME_ULAW) ||
quicktime_match_32(compressor, QUICKTIME_IMA4)) bits = 16;
file->atracks = (quicktime_audio_map_t*)calloc(1, sizeof(quicktime_audio_map_t));
trak = quicktime_add_track(file);
quicktime_trak_init_audio(file,
trak,
channels,
sample_rate,
bits,
compressor);
quicktime_init_audio_map(&(file->atracks[0]), trak);
file->atracks[file->total_atracks].track = trak;
file->atracks[file->total_atracks].channels = channels;
file->atracks[file->total_atracks].current_position = 0;
file->atracks[file->total_atracks].current_chunk = 1;
file->total_atracks++;
}
return 1; /* Return the number of tracks created */
}
void quicktime_init_maps(quicktime_t *file)
{
int i, track;
/* get tables for all the different tracks */
file->total_atracks = quicktime_audio_tracks(file);
file->atracks = (quicktime_audio_map_t*)calloc(1, sizeof(quicktime_audio_map_t) * file->total_atracks);
for(i = 0, track = 0; i < file->total_atracks; i++)
{
while(!file->moov.trak[track]->mdia.minf.is_audio)
track++;
quicktime_init_audio_map(&(file->atracks[i]), file->moov.trak[track]);
}
file->total_vtracks = quicktime_video_tracks(file);
file->vtracks = (quicktime_video_map_t*)calloc(1, sizeof(quicktime_video_map_t) * file->total_vtracks);
for(track = 0, i = 0; i < file->total_vtracks; i++)
{
while(!file->moov.trak[track]->mdia.minf.is_video)
track++;
quicktime_init_video_map(&(file->vtracks[i]), file->moov.trak[track]);
}
}
int quicktime_set_audio(quicktime_t *file,
int channels,
long sample_rate,
int bits,
int sample_size,
int time_scale,
int sample_duration,
char *compressor)
{
int i, j;
quicktime_trak_t *trak;
/* delete any existing tracks */
for(i = 0; i < file->total_atracks; i++) {
for (j = 0; j < file->atracks[i].totalHintTracks; j++) {
quicktime_delete_trak(&(file->moov),
file->atracks[i].hintTracks[j]);
free(file->atracks[i].hintTracks[j]);
file->atracks[i].hintTracks[j] = NULL;
file->total_hint_tracks--;
}
quicktime_delete_audio_map(&(file->atracks[i]));
quicktime_delete_trak(&(file->moov), file->atracks[i].track);
}
free(file->atracks);
file->atracks = NULL;
file->total_atracks = 0;
if(channels) {
/* Fake the bits parameter for some formats. */
if(quicktime_match_32(compressor, QUICKTIME_ULAW) ||
quicktime_match_32(compressor, QUICKTIME_IMA4)) bits = 16;
file->atracks = (quicktime_audio_map_t*)
calloc(1, sizeof(quicktime_audio_map_t));
trak = quicktime_add_track(&(file->moov));
quicktime_trak_init_audio(file, trak, channels, sample_rate, bits,
sample_size, time_scale, sample_duration, compressor);
quicktime_init_audio_map(&(file->atracks[0]), trak);
file->atracks[file->total_atracks].track = trak;
file->atracks[file->total_atracks].channels = channels;
file->atracks[file->total_atracks].current_position = 0;
file->atracks[file->total_atracks].current_chunk = 1;
file->total_atracks++;
}
return 1; /* Return the number of tracks created */
}
int quicktime_read_info(quicktime_t *file)
{
int result = 0, found_moov = 0;
int i, j, k, m, channel, trak_channel, track;
long start_position = quicktime_position(file);
quicktime_atom_t leaf_atom;
quicktime_trak_t *trak;
char avi_test[4];
/* Check for Microsoft AVI */
quicktime_read_char32(file, avi_test);
if(quicktime_match_32(avi_test, "RIFF"))
{
quicktime_read_char32(file, avi_test);
quicktime_read_char32(file, avi_test);
if(quicktime_match_32(avi_test, "AVI "))
file->use_avi = 1;
}
quicktime_set_position(file, 0);
do
{
result = quicktime_atom_read_header(file, &leaf_atom);
if(!result)
{
if(quicktime_atom_is(&leaf_atom, "mdat")) {
quicktime_read_mdat(file, &(file->mdat), &leaf_atom);
} else if(quicktime_atom_is(&leaf_atom, "moov")) {
quicktime_read_moov(file, &(file->moov), &leaf_atom);
found_moov = 1;
} else {
quicktime_atom_skip(file, &leaf_atom);
}
}
}while(!result && quicktime_position(file) < file->total_length);
/* go back to the original position */
quicktime_set_position(file, start_position);
if(found_moov) {
/* get tables for all the different tracks */
file->total_atracks = quicktime_audio_tracks(file);
file->atracks = (quicktime_audio_map_t*)calloc(1,
sizeof(quicktime_audio_map_t) * file->total_atracks);
for(i = 0, track = 0; i < file->total_atracks; i++) {
while(!file->moov.trak[track]->mdia.minf.is_audio)
track++;
quicktime_init_audio_map(&(file->atracks[i]), file->moov.trak[track]);
}
file->total_vtracks = quicktime_video_tracks(file);
file->vtracks = (quicktime_video_map_t*)calloc(1, sizeof(quicktime_video_map_t) * file->total_vtracks);
for(track = 0, i = 0; i < file->total_vtracks; i++)
{
while(!file->moov.trak[track]->mdia.minf.is_video)
track++;
quicktime_init_video_map(&(file->vtracks[i]), file->moov.trak[track]);
}
/* for all tracks */
for (track = 0; track < file->moov.total_tracks; track++) {
/* check if it's a hint track */
if (!file->moov.trak[track]->mdia.minf.is_hint) {
continue;
}
/* it is, so for each reference */
for (j = 0; j < file->moov.trak[track]->tref.hint.numTracks; j++) {
/* get the reference track id */
long refTrackId = file->moov.trak[track]->tref.hint.trackIds[j];
/* check each audio track */
for(k = 0; k < file->total_atracks; k++) {
if (file->atracks[k].track->tkhd.track_id == refTrackId) {
int m = file->atracks[k].totalHintTracks++;
file->atracks[k].hintTracks[m] = file->moov.trak[track];
file->atracks[k].hintPositions[m] = 0;
file->moov.trak[track]->tref.hint.traks[j] =
file->atracks[k].track;
file->total_hint_tracks++;
break;
}
}
/* check each video track */
for(k = 0; k < file->total_vtracks; k++) {
if (file->vtracks[k].track->tkhd.track_id == refTrackId) {
int m = file->vtracks[k].totalHintTracks++;
file->vtracks[k].hintTracks[m] = file->moov.trak[track];
file->vtracks[k].hintPositions[m] = 0;
file->moov.trak[track]->tref.hint.traks[j] =
file->vtracks[k].track;
file->total_hint_tracks++;
break;
}
}
}
}
}
if(found_moov)
return 0;
else
return 1;
}
