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direct rendering for SVQ1

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MpegEncContext->opaque MUST NOT be used by the codec, its for the parent program
 using standart values for pict_type
 using (uv)linesize
 handling dropable p-frames like b-frames

Originally committed as revision 763 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-07-15 21:19:37 +00:00
parent 0fd90455ec
commit 760acb18a3
2 changed files with 31 additions and 33 deletions
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2
libavcodec/mpegvideo.c
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@ -651,7 +651,7 @@ void MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
s->last_dr_opaque= s->next_dr_opaque;
s->next_dr_opaque= avctx->dr_opaque_frame;
if(s->has_b_frames && s->last_dr_opaque)
if(s->has_b_frames && s->last_dr_opaque && s->codec_id!=CODEC_ID_SVQ1)
avctx->dr_opaque_frame= s->last_dr_opaque;
else
avctx->dr_opaque_frame= s->next_dr_opaque;

62
libavcodec/svq1.c
View File

@ -54,10 +54,6 @@ typedef struct vlc_code_s {
#define SVQ1_BLOCK_INTER_4V 2
#define SVQ1_BLOCK_INTRA 3
#define SVQ1_FRAME_INTRA 0
#define SVQ1_FRAME_INTER 1
#define SVQ1_FRAME_DROPPABLE 2
/* motion vector (prediction) */
typedef struct svq1_pmv_s {
int x;
@ -2484,12 +2480,11 @@ static int svq1_decode_frame_header (bit_buffer_t *bitbuf,MpegEncContext *s) {
get_bits (bitbuf, 8);
/* frame type */
s->pict_type = get_bits (bitbuf, 2);
s->pict_type= get_bits (bitbuf, 2)+1;
if(s->pict_type==4)
return -1;
if (s->pict_type == 3)
return -1;
if (s->pict_type == SVQ1_FRAME_INTRA) {
if (s->pict_type == I_TYPE) {
/* unknown fields */
if (s->f_code == 0x50 || s->f_code == 0x60) {
@ -2572,6 +2567,8 @@ static int svq1_decode_frame(AVCodecContext *avctx,
}
result = svq1_decode_frame_header (&s->gb, s);
MPV_frame_start(s, avctx);
if (result != 0)
{
@ -2583,22 +2580,30 @@ static int svq1_decode_frame(AVCodecContext *avctx,
/* decode y, u and v components */
for (i=0; i < 3; i++) {
int linesize;
if (i == 0) {
width = (s->width+15)&~15;
height = (s->height+15)&~15;
linesize= s->linesize;
} else {
width = (s->width/4+15)&~15;
height = (s->height/4+15)&~15;
linesize= s->uvlinesize;
}
current = s->current_picture[i];
previous = s->last_picture[i];
if (s->pict_type == SVQ1_FRAME_INTRA) {
if(s->pict_type==B_TYPE){
previous = s->next_picture[i];
}else{
previous = s->last_picture[i];
}
if (s->pict_type == I_TYPE) {
/* keyframe */
for (y=0; y < height; y+=16) {
for (x=0; x < width; x+=16) {
result = svq1_decode_block_intra (&s->gb, &current[x], width);
result = svq1_decode_block_intra (&s->gb, &current[x], linesize);
if (result != 0)
{
#ifdef DEBUG_SVQ1
@ -2607,16 +2612,17 @@ static int svq1_decode_frame(AVCodecContext *avctx,
return result;
}
}
current += 16*width;
current += 16*linesize;
}
} else {
svq1_pmv_t pmv[width/8+3];
/* delta frame */
memset (s->opaque, 0, ((width / 8) + 3) * sizeof(svq1_pmv_t));
memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv_t));
for (y=0; y < height; y+=16) {
for (x=0; x < width; x+=16) {
result = svq1_decode_delta_block (&s->gb, &current[x], previous,
width, s->opaque, x, y);
linesize, pmv, x, y);
if (result != 0)
{
#ifdef DEBUG_SVQ1
@ -2626,23 +2632,17 @@ static int svq1_decode_frame(AVCodecContext *avctx,
}
}
((svq1_pmv_t *)s->opaque)[0].x =
((svq1_pmv_t *)s->opaque)[0].y = 0;
pmv[0].x =
pmv[0].y = 0;
current += 16*width;
current += 16*linesize;
}
}
pict->data[i] = s->current_picture[i];
pict->linesize[i] = width;
/* update backward reference frame */
if (s->pict_type != SVQ1_FRAME_DROPPABLE)
{
uint8_t *tmp = s->last_picture[i];
s->last_picture[i] = s->current_picture[i];
s->current_picture[i] = tmp;
}
pict->linesize[i] = linesize;
}
*data_size=sizeof(AVPicture);
return 0;
}
@ -2656,11 +2656,9 @@ static int svq1_decode_init(AVCodecContext *avctx)
s->height = (avctx->height+3)&~3;
s->codec_id= avctx->codec->id;
avctx->mbskip_table= s->mbskip_table;
s->opaque = (svq1_pmv_t *) malloc (((s->width / 8) + 3) * sizeof(svq1_pmv_t));
if (MPV_common_init(s) < 0) return -1;
for(i=0;i<3;i++)
s->current_picture[i] = s->next_picture[i];
avctx->pix_fmt = PIX_FMT_YUV410P;
avctx->has_b_frames= s->has_b_frames=1; // not true, but DP frames and these behave like unidirectional b frames
if (MPV_common_init(s) < 0) return -1;
return 0;
}
@ -2669,7 +2667,6 @@ static int svq1_decode_end(AVCodecContext *avctx)
MpegEncContext *s = avctx->priv_data;
MPV_common_end(s);
free(s->opaque);
return 0;
}
@ -2681,5 +2678,6 @@ AVCodec svq1_decoder = {
svq1_decode_init,
NULL,
svq1_decode_end,
svq1_decode_frame
svq1_decode_frame,
CODEC_CAP_DR1,
};