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Implement CODEC_CAP_DRAW_HORIZ_BAND for VP3 decoder

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Originally committed as revision 21780 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-02-12 22:01:35 +00:00
parent 621f9a40b1
commit a8de390163
1 changed files with 39 additions and 3 deletions
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42
libavcodec/vp3.c
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@ -135,6 +135,7 @@ typedef struct Vp3DecodeContext {
int keyframe;
DSPContext dsp;
int flipped_image;
int last_slice_end;
int qps[3];
int nqps;
@ -1450,6 +1451,37 @@ static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int ye
}
}
/**
* called when all pixels up to row y are complete
*/
static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
{
int h, cy;
int offset[4];
if(s->avctx->draw_horiz_band==NULL)
return;
h= y - s->last_slice_end;
y -= h;
if (!s->flipped_image) {
if (y == 0)
h -= s->height - s->avctx->height; // account for non-mod16
y = s->height - y - h;
}
cy = y >> 1;
offset[0] = s->current_frame.linesize[0]*y;
offset[1] = s->current_frame.linesize[1]*cy;
offset[2] = s->current_frame.linesize[2]*cy;
offset[3] = 0;
emms_c();
s->avctx->draw_horiz_band(s->avctx, &s->current_frame, offset, y, 3, h);
s->last_slice_end= y + h;
}
/*
* Perform the final rendering for a particular slice of data.
* The slice number ranges from 0..(macroblock_height - 1).
@ -1624,7 +1656,9 @@ static void render_slice(Vp3DecodeContext *s, int slice)
* dispatch (slice - 1);
*/
emms_c();
// now that we've filtered the last rows, they're safe to display
if (slice)
vp3_draw_horiz_band(s, 16*slice);
}
/*
@ -2008,6 +2042,7 @@ static int vp3_decode_frame(AVCodecContext *avctx,
return -1;
}
s->last_slice_end = 0;
for (i = 0; i < s->macroblock_height; i++)
render_slice(s, i);
@ -2016,6 +2051,7 @@ static int vp3_decode_frame(AVCodecContext *avctx,
int row = (s->height >> (3+!!i)) - 1;
apply_loop_filter(s, i, row, row+1);
}
vp3_draw_horiz_band(s, s->height);
*data_size=sizeof(AVFrame);
*(AVFrame*)data= s->current_frame;
@ -2367,7 +2403,7 @@ AVCodec theora_decoder = {
NULL,
vp3_decode_end,
vp3_decode_frame,
CODEC_CAP_DR1,
CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
NULL,
.long_name = NULL_IF_CONFIG_SMALL("Theora"),
};
@ -2382,7 +2418,7 @@ AVCodec vp3_decoder = {
NULL,
vp3_decode_end,
vp3_decode_frame,
CODEC_CAP_DR1,
CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
NULL,
.long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
};