static decoder_t *CreateDecoder( vlc_object_t *p_this, video_format_t *fmt )
{
decoder_t *p_dec;
p_dec = vlc_custom_create( p_this, sizeof( *p_dec ), "image decoder" );
if( p_dec == NULL )
return NULL;
p_dec->p_module = NULL;
es_format_Init( &p_dec->fmt_in, VIDEO_ES, fmt->i_chroma );
es_format_Init( &p_dec->fmt_out, VIDEO_ES, 0 );
p_dec->fmt_in.video = *fmt;
p_dec->b_frame_drop_allowed = false;
p_dec->pf_vout_format_update = video_update_format;
p_dec->pf_vout_buffer_new = video_new_buffer;
/* Find a suitable decoder module */
p_dec->p_module = module_need( p_dec, "decoder", "$codec", false );
if( !p_dec->p_module )
{
msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'. "
"VLC probably does not support this image format.",
(char*)&p_dec->fmt_in.i_codec );
DeleteDecoder( p_dec );
return NULL;
}
return p_dec;
}
/**
* Delete the image_handler_t instance
*
*/
void image_HandlerDelete( image_handler_t *p_image )
{
if( !p_image ) return;
if( p_image->p_dec ) DeleteDecoder( p_image->p_dec );
if( p_image->p_enc ) DeleteEncoder( p_image->p_enc );
if( p_image->p_filter ) DeleteFilter( p_image->p_filter );
free( p_image );
p_image = NULL;
}
static picture_t *ImageRead( image_handler_t *p_image, block_t *p_block,
video_format_t *p_fmt_in,
video_format_t *p_fmt_out )
{
picture_t *p_pic = NULL, *p_tmp;
/* Check if we can reuse the current decoder */
if( p_image->p_dec &&
p_image->p_dec->fmt_in.i_codec != p_fmt_in->i_chroma )
{
DeleteDecoder( p_image->p_dec );
p_image->p_dec = 0;
}
/* Start a decoder */
if( !p_image->p_dec )
{
p_image->p_dec = CreateDecoder( p_image->p_parent, p_fmt_in );
if( !p_image->p_dec )
{
block_Release(p_block);
return NULL;
}
}
p_block->i_pts = p_block->i_dts = mdate();
while( (p_tmp = p_image->p_dec->pf_decode_video( p_image->p_dec, &p_block ))
!= NULL )
{
if( p_pic != NULL )
picture_Release( p_pic );
p_pic = p_tmp;
}
if( p_pic == NULL )
{
msg_Warn( p_image->p_parent, "no image decoded" );
return 0;
}
if( !p_fmt_out->i_chroma )
p_fmt_out->i_chroma = p_image->p_dec->fmt_out.video.i_chroma;
if( !p_fmt_out->i_width && p_fmt_out->i_height )
p_fmt_out->i_width = (int64_t)p_image->p_dec->fmt_out.video.i_width *
p_image->p_dec->fmt_out.video.i_sar_num *
p_fmt_out->i_height /
p_image->p_dec->fmt_out.video.i_height /
p_image->p_dec->fmt_out.video.i_sar_den;
if( !p_fmt_out->i_height && p_fmt_out->i_width )
p_fmt_out->i_height = (int64_t)p_image->p_dec->fmt_out.video.i_height *
p_image->p_dec->fmt_out.video.i_sar_den *
p_fmt_out->i_width /
p_image->p_dec->fmt_out.video.i_width /
p_image->p_dec->fmt_out.video.i_sar_num;
if( !p_fmt_out->i_width )
p_fmt_out->i_width = p_image->p_dec->fmt_out.video.i_width;
if( !p_fmt_out->i_height )
p_fmt_out->i_height = p_image->p_dec->fmt_out.video.i_height;
if( !p_fmt_out->i_visible_width )
p_fmt_out->i_visible_width = p_fmt_out->i_width;
if( !p_fmt_out->i_visible_height )
p_fmt_out->i_visible_height = p_fmt_out->i_height;
/* Check if we need chroma conversion or resizing */
if( p_image->p_dec->fmt_out.video.i_chroma != p_fmt_out->i_chroma ||
p_image->p_dec->fmt_out.video.i_width != p_fmt_out->i_width ||
p_image->p_dec->fmt_out.video.i_height != p_fmt_out->i_height )
{
if( p_image->p_filter )
if( p_image->p_filter->fmt_in.video.i_chroma !=
p_image->p_dec->fmt_out.video.i_chroma ||
p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
{
/* We need to restart a new filter */
DeleteFilter( p_image->p_filter );
p_image->p_filter = 0;
}
/* Start a filter */
if( !p_image->p_filter )
{
p_image->p_filter =
CreateFilter( p_image->p_parent, &p_image->p_dec->fmt_out,
p_fmt_out );
if( !p_image->p_filter )
{
picture_Release( p_pic );
return NULL;
}
}
else
{
/* Filters should handle on-the-fly size changes */
p_image->p_filter->fmt_in = p_image->p_dec->fmt_out;
p_image->p_filter->fmt_out = p_image->p_dec->fmt_out;
p_image->p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
p_image->p_filter->fmt_out.video = *p_fmt_out;
}
p_pic = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
*p_fmt_out = p_image->p_filter->fmt_out.video;
}
else *p_fmt_out = p_image->p_dec->fmt_out.video;
return p_pic;
}
static picture_t *ImageRead( image_handler_t *p_image, block_t *p_block,
const video_format_t *p_fmt_in,
video_format_t *p_fmt_out )
{
picture_t *p_pic = NULL;
/* Check if we can reuse the current decoder */
if( p_image->p_dec &&
p_image->p_dec->fmt_in.i_codec != p_fmt_in->i_chroma )
{
DeleteDecoder( p_image->p_dec );
p_image->p_dec = 0;
}
/* Start a decoder */
if( !p_image->p_dec )
{
p_image->p_dec = CreateDecoder( p_image->p_parent, p_fmt_in );
if( !p_image->p_dec )
{
block_Release(p_block);
return NULL;
}
if( p_image->p_dec->fmt_out.i_cat != VIDEO_ES )
{
DeleteDecoder( p_image->p_dec );
p_image->p_dec = NULL;
block_Release(p_block);
return NULL;
}
p_image->p_dec->pf_queue_video = ImageQueueVideo;
p_image->p_dec->p_queue_ctx = p_image;
}
p_block->i_pts = p_block->i_dts = mdate();
int ret = p_image->p_dec->pf_decode( p_image->p_dec, p_block );
if( ret == VLCDEC_SUCCESS )
{
/* Drain */
p_image->p_dec->pf_decode( p_image->p_dec, NULL );
p_pic = picture_fifo_Pop( p_image->outfifo );
unsigned lostcount = 0;
picture_t *lostpic;
while( ( lostpic = picture_fifo_Pop( p_image->outfifo ) ) != NULL )
{
picture_Release( lostpic );
lostcount++;
}
if( lostcount > 0 )
msg_Warn( p_image->p_parent, "Image decoder output more than one "
"picture (%d)", lostcount );
}
if( p_pic == NULL )
{
msg_Warn( p_image->p_parent, "no image decoded" );
return 0;
}
if( !p_fmt_out->i_chroma )
p_fmt_out->i_chroma = p_image->p_dec->fmt_out.video.i_chroma;
if( !p_fmt_out->i_width && p_fmt_out->i_height )
p_fmt_out->i_width = (int64_t)p_image->p_dec->fmt_out.video.i_width *
p_image->p_dec->fmt_out.video.i_sar_num *
p_fmt_out->i_height /
p_image->p_dec->fmt_out.video.i_height /
p_image->p_dec->fmt_out.video.i_sar_den;
if( !p_fmt_out->i_height && p_fmt_out->i_width )
p_fmt_out->i_height = (int64_t)p_image->p_dec->fmt_out.video.i_height *
p_image->p_dec->fmt_out.video.i_sar_den *
p_fmt_out->i_width /
p_image->p_dec->fmt_out.video.i_width /
p_image->p_dec->fmt_out.video.i_sar_num;
if( !p_fmt_out->i_width )
p_fmt_out->i_width = p_image->p_dec->fmt_out.video.i_width;
if( !p_fmt_out->i_height )
p_fmt_out->i_height = p_image->p_dec->fmt_out.video.i_height;
if( !p_fmt_out->i_visible_width )
p_fmt_out->i_visible_width = p_fmt_out->i_width;
if( !p_fmt_out->i_visible_height )
p_fmt_out->i_visible_height = p_fmt_out->i_height;
/* Check if we need chroma conversion or resizing */
if( p_image->p_dec->fmt_out.video.i_chroma != p_fmt_out->i_chroma ||
p_image->p_dec->fmt_out.video.i_width != p_fmt_out->i_width ||
p_image->p_dec->fmt_out.video.i_height != p_fmt_out->i_height )
{
if( p_image->p_filter )
if( p_image->p_filter->fmt_in.video.i_chroma !=
p_image->p_dec->fmt_out.video.i_chroma ||
p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
{
/* We need to restart a new filter */
DeleteFilter( p_image->p_filter );
p_image->p_filter = 0;
}
/* Start a filter */
if( !p_image->p_filter )
{
p_image->p_filter =
CreateFilter( p_image->p_parent, &p_image->p_dec->fmt_out,
p_fmt_out );
if( !p_image->p_filter )
{
picture_Release( p_pic );
return NULL;
}
}
else
{
/* Filters should handle on-the-fly size changes */
p_image->p_filter->fmt_in = p_image->p_dec->fmt_out;
p_image->p_filter->fmt_out = p_image->p_dec->fmt_out;
p_image->p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
p_image->p_filter->fmt_out.video = *p_fmt_out;
}
p_pic = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
video_format_Clean( p_fmt_out );
video_format_Copy( p_fmt_out, &p_image->p_filter->fmt_out.video );
}
else
{
video_format_Clean( p_fmt_out );
video_format_Copy( p_fmt_out, &p_image->p_dec->fmt_out.video );
}
return p_pic;
}