-static int32_t sample_range_size(const struct mp4 *f, int32_t track,
- int32_t chunk_sample, int32_t sample)
-{
- int32_t i, total;
- const struct mp4_track *p_track = f->track[track];
-
- if (p_track->stsz_sample_size) {
- return (sample - chunk_sample) * p_track->stsz_sample_size;
- } else {
- if (sample >= p_track->stsz_sample_count)
- return 0; //error
-
- for (i = chunk_sample, total = 0; i < sample; i++) {
- total += p_track->stsz_table[i];
- }
- }
-
- return total;
-}
-
-static int32_t sample_to_offset(const struct mp4 *f, int32_t track,
- int32_t sample)
-{
- int32_t chunk, chunk_sample, chunk_offset1, chunk_offset2;
-
- chunk_of_sample(f, track, sample, &chunk_sample, &chunk);
-
- chunk_offset1 = chunk_to_offset(f, track, chunk);
- chunk_offset2 = chunk_offset1 + sample_range_size(f,
- track, chunk_sample, sample);
- return chunk_offset2;
-}
-