int lwlibav_get_desired_video_track
(
const char *file_path,
lwlibav_video_decode_handler_t *vdhp,
int threads
)
{
int error = vdhp->stream_index < 0
|| vdhp->frame_count == 0
|| lavf_open_file( &vdhp->format, file_path, &vdhp->lh );
AVCodecContext *ctx = !error ? vdhp->format->streams[ vdhp->stream_index ]->codec : NULL;
if( error || open_decoder( ctx, vdhp->codec_id, threads ) )
{
if( vdhp->index_entries )
av_freep( &vdhp->index_entries );
if( vdhp->frame_list )
lw_freep( &vdhp->frame_list );
if( vdhp->order_converter )
lw_freep( &vdhp->order_converter );
if( vdhp->keyframe_list )
lw_freep( &vdhp->keyframe_list );
if( vdhp->format )
{
lavf_close_file( &vdhp->format );
vdhp->format = NULL;
}
return -1;
}
vdhp->ctx = ctx;
ctx->refcounted_frames = 1;
return 0;
}
int lwlibav_audio_get_desired_track
(
const char *file_path,
lwlibav_audio_decode_handler_t *adhp,
int threads
)
{
AVCodecContext *ctx = NULL;
if( adhp->stream_index < 0
|| adhp->frame_count == 0
|| lavf_open_file( &adhp->format, file_path, &adhp->lh ) < 0
|| find_and_open_decoder( &ctx, adhp->format->streams[ adhp->stream_index ]->codecpar,
adhp->preferred_decoder_names, threads, 0 ) < 0 )
{
av_freep( &adhp->index_entries );
lw_freep( &adhp->frame_list );
if( adhp->format )
lavf_close_file( &adhp->format );
return -1;
}
adhp->ctx = ctx;
return 0;
}
void lwlibav_audio_free_decode_handler
(
lwlibav_audio_decode_handler_t *adhp
)
{
if( !adhp )
return;
lwlibav_extradata_handler_t *exhp = &adhp->exh;
if( exhp->entries )
{
for( int i = 0; i < exhp->entry_count; i++ )
if( exhp->entries[i].extradata )
av_free( exhp->entries[i].extradata );
lw_free( exhp->entries );
}
av_packet_unref( &adhp->packet );
lw_free( adhp->frame_list );
av_free( adhp->index_entries );
av_frame_free( &adhp->frame_buffer );
avcodec_free_context( &adhp->ctx );
if( adhp->format )
lavf_close_file( &adhp->format );
lw_free( adhp );
}
void lwlibav_cleanup_video_decode_handler
(
lwlibav_video_decode_handler_t *vdhp
)
{
lwlibav_extradata_handler_t *exhp = &vdhp->exh;
if( exhp->entries )
{
for( int i = 0; i < exhp->entry_count; i++ )
if( exhp->entries[i].extradata )
av_free( exhp->entries[i].extradata );
free( exhp->entries );
}
av_free_packet( &vdhp->packet );
if( vdhp->frame_list )
lw_freep( &vdhp->frame_list );
if( vdhp->order_converter )
lw_freep( &vdhp->order_converter );
if( vdhp->keyframe_list )
lw_freep( &vdhp->keyframe_list );
if( vdhp->index_entries )
av_freep( &vdhp->index_entries );
if( vdhp->frame_buffer )
av_frame_free( &vdhp->frame_buffer );
if( vdhp->first_valid_frame )
av_frame_free( &vdhp->first_valid_frame );
if( vdhp->movable_frame_buffer )
av_frame_free( &vdhp->movable_frame_buffer );
if( vdhp->ctx )
{
avcodec_close( vdhp->ctx );
vdhp->ctx = NULL;
}
if( vdhp->format )
lavf_close_file( &vdhp->format );
}
