static int prepare_audio_decoding( lsmash_handler_t *h, audio_option_t *opt )
{
libav_handler_t *hp = (libav_handler_t *)h->audio_private;
lwlibav_audio_decode_handler_t *adhp = &hp->adh;
if( !adhp->ctx )
return 0;
/* Import AVIndexEntrys. */
if( lwlibav_import_av_index_entry( (lwlibav_decode_handler_t *)adhp ) < 0 )
return -1;
avcodec_get_frame_defaults( adhp->frame_buffer );
#ifndef DEBUG_AUDIO
adhp->lh.level = LW_LOG_FATAL;
#endif
lwlibav_audio_output_handler_t *aohp = &hp->aoh;
if( au_setup_audio_rendering( aohp, adhp->ctx, opt, &h->audio_format.Format ) < 0 )
return -1;
/* Count the number of PCM audio samples. */
h->audio_pcm_sample_count = lwlibav_count_overall_pcm_samples( adhp, aohp->output_sample_rate );
if( h->audio_pcm_sample_count == 0 )
{
DEBUG_AUDIO_MESSAGE_BOX_DESKTOP( MB_ICONERROR | MB_OK, "No valid audio frame." );
return -1;
}
if( hp->lwh.av_gap && aohp->output_sample_rate != adhp->ctx->sample_rate )
hp->lwh.av_gap = ((int64_t)hp->lwh.av_gap * aohp->output_sample_rate - 1) / adhp->ctx->sample_rate + 1;
h->audio_pcm_sample_count += hp->lwh.av_gap;
/* Force seeking at the first reading. */
adhp->next_pcm_sample_number = h->audio_pcm_sample_count + 1;
return 0;
}
static int prepare_video_decoding( lsmash_handler_t *h, video_option_t *opt )
{
libav_handler_t *hp = (libav_handler_t *)h->video_private;
lwlibav_video_decode_handler_t *vdhp = &hp->vdh;
if( !vdhp->ctx )
return 0;
vdhp->seek_mode = opt->seek_mode;
vdhp->forward_seek_threshold = opt->forward_seek_threshold;
lwlibav_video_output_handler_t *vohp = &hp->voh;
h->video_sample_count = vohp->frame_count;
/* Import AVIndexEntrys. */
if( lwlibav_import_av_index_entry( (lwlibav_decode_handler_t *)vdhp ) < 0 )
return -1;
/* Set up timestamp info. */
hp->uType = MB_OK;
lwlibav_setup_timestamp_info( &hp->lwh, vdhp, vohp, &h->framerate_num, &h->framerate_den );
hp->uType = MB_ICONERROR | MB_OK;
/* Set up the initial input format. */
vdhp->ctx->width = vdhp->initial_width;
vdhp->ctx->height = vdhp->initial_height;
vdhp->ctx->pix_fmt = vdhp->initial_pix_fmt;
vdhp->ctx->colorspace = vdhp->initial_colorspace;
/* Set up video rendering. */
vdhp->exh.get_buffer = au_setup_video_rendering( vohp, vdhp->ctx, opt, &h->video_format, vdhp->max_width, vdhp->max_height );
if( !vdhp->exh.get_buffer )
return -1;
#ifndef DEBUG_VIDEO
vdhp->lh.level = LW_LOG_FATAL;
#endif
/* Find the first valid video frame. */
if( lwlibav_find_first_valid_video_frame( vdhp ) < 0 )
return -1;
/* Force seeking at the first reading. */
vdhp->last_frame_number = h->video_sample_count + 1;
return 0;
}
static int prepare_video_decoding
(
lwlibav_handler_t *hp,
VSMap *out,
VSCore *core,
const VSAPI *vsapi
)
{
lwlibav_video_decode_handler_t *vdhp = hp->vdhp;
lwlibav_video_output_handler_t *vohp = hp->vohp;
VSVideoInfo *vi = &hp->vi;
/* Import AVIndexEntrys. */
if( lwlibav_import_av_index_entry( (lwlibav_decode_handler_t *)vdhp ) < 0 )
return -1;
/* Set up output format. */
lwlibav_video_set_initial_input_format( vdhp );
AVCodecContext *ctx = lwlibav_video_get_codec_context( vdhp );
vs_video_output_handler_t *vs_vohp = (vs_video_output_handler_t *)vohp->private_handler;
vs_vohp->frame_ctx = NULL;
vs_vohp->core = core;
vs_vohp->vsapi = vsapi;
int max_width = lwlibav_video_get_max_width ( vdhp );
int max_height = lwlibav_video_get_max_height( vdhp );
if( vs_setup_video_rendering( vohp, ctx, vi, out, max_width, max_height ) < 0 )
return -1;
lwlibav_video_set_get_buffer_func( vdhp );
/* Find the first valid video frame. */
if( lwlibav_video_find_first_valid_frame( vdhp ) < 0 )
{
set_error_on_init( out, vsapi, "lsmas: failed to allocate the first valid video frame." );
return -1;
}
/* Force seeking at the first reading. */
lwlibav_video_force_seek( vdhp );
return 0;
}
