[SCM] libav/experimental: Support range reduced frames
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:49:28 UTC 2013
The following commit has been merged in the experimental branch:
commit ffb9a8b1b6d199cb7665c17a0e79612d02f5f979
Author: Kostya Shishkov <kostya.shishkov at gmail.com>
Date: Sat Jul 29 03:07:30 2006 +0000
Support range reduced frames
Originally committed as revision 5844 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 29cf5bb..3c74939 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -880,6 +880,14 @@ static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
int ys, us, vs;
DSPContext *dsp = &v->s.dsp;
+ if(v->rangeredfrm) {
+ int i, j, k;
+ for(k = 0; k < 6; k++)
+ for(j = 0; j < 8; j++)
+ for(i = 0; i < 8; i++)
+ block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
+
+ }
ys = v->s.current_picture.linesize[0];
us = v->s.current_picture.linesize[1];
vs = v->s.current_picture.linesize[2];
@@ -943,7 +951,7 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
srcV = s->edge_emu_buffer + 18 * s->linesize;
}
- if((v->mv_mode == MV_PMODE_INTENSITY_COMP)
+ if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
|| (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
uint8_t *uvbuf= s->edge_emu_buffer + 18 * s->linesize;
@@ -957,6 +965,26 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = uvbuf;
srcV = uvbuf + 16;
+ /* if we deal with range reduction we need to scale source blocks */
+ if(v->rangeredfrm) {
+ int i, j;
+ uint8_t *src, *src2;
+
+ src = srcY;
+ for(j = 0; j < 17; j++) {
+ for(i = 0; i < 17; i++) src[i] = ((src[i] - 128) >> 1) + 128;
+ src += s->linesize;
+ }
+ src = srcU; src2 = srcV;
+ for(j = 0; j < 9; j++) {
+ for(i = 0; i < 9; i++) {
+ src[i] = ((src[i] - 128) >> 1) + 128;
+ src2[i] = ((src2[i] - 128) >> 1) + 128;
+ }
+ src += s->uvlinesize;
+ src2 += s->uvlinesize;
+ }
+ }
/* if we deal with intensity compensation we need to scale source blocks */
if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
int i, j;
@@ -1039,11 +1067,22 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n)
srcY += src_y * s->linesize + src_x;
- if((unsigned)src_x > s->h_edge_pos - (mx&3) - 16
+ if(v->rangeredfrm || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 16+1, 16+1,
src_x, src_y, s->h_edge_pos, s->v_edge_pos);
srcY = s->edge_emu_buffer;
+ /* if we deal with range reduction we need to scale source blocks */
+ if(v->rangeredfrm) {
+ int i, j;
+ uint8_t *src;
+
+ src = srcY;
+ for(j = 0; j < 17; j++) {
+ for(i = 0; i < 17; i++) src[i] = ((src[i] - 128) >> 1) + 128;
+ src += s->linesize;
+ }
+ }
}
if(!s->quarter_sample) { // hpel mc
@@ -1141,7 +1180,7 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
uvsrc_y = clip(uvsrc_y, -8, s->mb_height * 8);
srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
- if((unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
+ if(v->rangeredfrm || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
|| (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){
ff_emulated_edge_mc(s->edge_emu_buffer , srcU, s->uvlinesize, 8+1, 8+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
@@ -1149,6 +1188,22 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = s->edge_emu_buffer;
srcV = s->edge_emu_buffer + 16;
+
+ /* if we deal with range reduction we need to scale source blocks */
+ if(v->rangeredfrm) {
+ int i, j;
+ uint8_t *src, *src2;
+
+ src = srcU; src2 = srcV;
+ for(j = 0; j < 9; j++) {
+ for(i = 0; i < 9; i++) {
+ src[i] = ((src[i] - 128) >> 1) + 128;
+ src2[i] = ((src2[i] - 128) >> 1) + 128;
+ }
+ src += s->uvlinesize;
+ src2 += s->uvlinesize;
+ }
+ }
}
if(v->fastuvmc) {
@@ -2578,6 +2633,7 @@ static int vc1_decode_p_mb(VC1Context *v)
vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
vc1_inv_trans(s->block[i], 8, 8);
+ if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
for(j = 0; j < 64; j++) s->block[i][j] += 128;
s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
/* TODO: proper loop filtering */
@@ -2681,6 +2737,7 @@ static int vc1_decode_p_mb(VC1Context *v)
vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
vc1_inv_trans(s->block[i], 8, 8);
+ if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
for(j = 0; j < 64; j++) s->block[i][j] += 128;
s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
/* TODO: proper loop filtering */
@@ -2846,6 +2903,7 @@ static void vc1_decode_b_mb(VC1Context *v)
vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
vc1_inv_trans(s->block[i], 8, 8);
+ if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
for(j = 0; j < 64; j++) s->block[i][j] += 128;
s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
/* TODO: proper loop filtering */
--
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