long Nes_Rewinder::read_samples( short* out, long out_size )
{
int count = samples_avail();
if ( count )
{
if ( count > out_size )
{
count = out_size;
}
if ( !reverse_enabled )
{
memcpy( out, frames [current_frame].samples, count * sizeof *out );
}
else
{
int step = samples_per_frame();
for ( int i = step; i-- > 0; )
copy_reverse( frames [current_frame].samples + i, count, out + i, step );
}
if ( fade_sound_in )
{
fade_sound_in = false;
fade_samples_( out, count, 1 );
}
if ( frames [current_frame].fade_out )
{
fade_sound_in = true;
fade_samples_( out, count, -1 );
}
}
return count;
}
static gboolean
process (GeglOperation *operation,
GeglBuffer *output,
const GeglRectangle *result,
gint level)
{
GeglProperties *o = GEGL_PROPERTIES (operation);
Priv *p = (Priv*)o->user_data;
{
if (p->video_fcontext && !decode_frame (operation, o->frame))
{
long sample_start = 0;
if (p->audio_stream)
{
int sample_count;
gegl_audio_fragment_set_sample_rate (o->audio, p->audio_stream->codec->sample_rate);
gegl_audio_fragment_set_channels (o->audio, 2);
gegl_audio_fragment_set_channel_layout (o->audio, GEGL_CH_LAYOUT_STEREO);
sample_count = samples_per_frame (o->frame,
o->frame_rate, p->audio_stream->codec->sample_rate,
&sample_start);
gegl_audio_fragment_set_sample_count (o->audio, sample_count);
decode_audio (operation, p->prevpts, p->prevpts + 5.0);
{
int i;
for (i = 0; i < sample_count; i++)
{
get_sample_data (p, sample_start + i, &o->audio->data[0][i],
&o->audio->data[1][i]);
}
}
}
if (p->video_stream->codec->pix_fmt == AV_PIX_FMT_RGB24)
{
GeglRectangle extent = {0,0,p->width,p->height};
gegl_buffer_set (output, &extent, 0, babl_format("R'G'B' u8"), p->lavc_frame->data[0], GEGL_AUTO_ROWSTRIDE);
}
else
{
struct SwsContext *img_convert_ctx;
GeglRectangle extent = {0,0,p->width,p->height};
img_convert_ctx = sws_getContext(p->width, p->height, p->video_stream->codec->pix_fmt,
p->width, p->height, AV_PIX_FMT_RGB24,
SWS_BICUBIC, NULL, NULL, NULL);
if (!p->rgb_frame)
p->rgb_frame = alloc_picture (AV_PIX_FMT_RGB24, p->width, p->height);
sws_scale (img_convert_ctx, (void*)p->lavc_frame->data,
p->lavc_frame->linesize, 0, p->height, p->rgb_frame->data, p->rgb_frame->linesize);
gegl_buffer_set (output, &extent, 0, babl_format("R'G'B' u8"), p->rgb_frame->data[0], GEGL_AUTO_ROWSTRIDE);
sws_freeContext (img_convert_ctx);
}
}
}
return TRUE;
}
