hvirtual/libmpeg3/mpeg3atrack.c

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#include "libmpeg3.h"
#include "mpeg3protos.h"

#include <stdlib.h>

mpeg3_atrack_t* mpeg3_new_atrack(mpeg3_t *file, 
        int custom_id, 
        int format, 
        mpeg3_demuxer_t *demuxer,
        int number)
{
        mpeg3_atrack_t *new_atrack;

        new_atrack = calloc(1, sizeof(mpeg3_atrack_t));
        if(file->channel_counts)
                new_atrack->channels = file->channel_counts[number];
        new_atrack->sample_rate = 0;
        new_atrack->total_samples = 0;
        new_atrack->demuxer = mpeg3_new_demuxer(file, 1, 0, custom_id);
        if(file->seekable)
        {
                mpeg3demux_copy_titles(new_atrack->demuxer, demuxer);
        }
        new_atrack->current_position = 0;
        new_atrack->pid = custom_id;


/* Copy pointers */
        if(file->sample_offsets)
        {
                new_atrack->sample_offsets = file->sample_offsets[number];
                new_atrack->total_sample_offsets = file->total_sample_offsets[number];
                new_atrack->total_samples = file->total_samples[number];
                new_atrack->demuxer->stream_end = file->audio_eof[number];
        }

        new_atrack->audio = mpeg3audio_new(file, 
                new_atrack, 
                format);

        if(!new_atrack->audio)
        {
/* Failed */
                mpeg3_delete_atrack(file, new_atrack);
                new_atrack = 0;
        }

        return new_atrack;
}

int mpeg3_delete_atrack(mpeg3_t *file, mpeg3_atrack_t *atrack)
{
        if(atrack->audio) mpeg3audio_delete(atrack->audio);
        if(atrack->demuxer) mpeg3_delete_demuxer(atrack->demuxer);
        if(atrack->sample_offsets && atrack->private_offsets)
        {
                free(atrack->sample_offsets);
        }
        free(atrack);
        return 0;
}

void mpeg3_append_samples(mpeg3_atrack_t *atrack, int64_t offset)
{
        if(atrack->total_sample_offsets >= atrack->sample_offsets_allocated)
        {
                atrack->sample_offsets_allocated = 
                        MAX(atrack->total_sample_offsets * 2, 1024);
                atrack->sample_offsets = realloc(atrack->sample_offsets,
                        sizeof(int64_t) * atrack->sample_offsets_allocated);
        }
        atrack->sample_offsets[atrack->total_sample_offsets++] =
                offset;
        atrack->private_offsets = 1;
}

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