[FFmpeg-cvslog] h264: fix PCM intra-coded blocks in monochrome case

[Jeff Downs]

ffmpeg | branch: release/0.8 | Jeff Downs <heydowns at somuchpressure.net> | Tue Jul  5 13:20:06 2011 -0400| [ce8f40a7b9e9fd8bc47181dc4a2b4de0042dac72] | committer: Reinhard Tartler

h264: fix PCM intra-coded blocks in monochrome case

Signed-off-by: Diego Biurrun <diego at biurrun.de>
(cherry picked from commit 6581e161c5f46733a5619208483de29416eb9a51)

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ce8f40a7b9e9fd8bc47181dc4a2b4de0042dac72
---

 libavcodec/h264.c |   46 ++++++++++++++++++++++++++++++++++------------
 1 files changed, 34 insertions(+), 12 deletions(-)

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 1c60de7..75075f6 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1851,15 +1851,30 @@ static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple, i
                     tmp_y[j] = get_bits(&gb, bit_depth);
             }
             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
-                for (i = 0; i < 8; i++) {
-                    uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
-                    for (j = 0; j < 8; j++)
-                        tmp_cb[j] = get_bits(&gb, bit_depth);
-                }
-                for (i = 0; i < 8; i++) {
-                    uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
-                    for (j = 0; j < 8; j++)
-                        tmp_cr[j] = get_bits(&gb, bit_depth);
+                if (!h->sps.chroma_format_idc) {
+                    for (i = 0; i < 8; i++) {
+                        uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
+                        for (j = 0; j < 8; j++) {
+                            tmp_cb[j] = 1 << (bit_depth - 1);
+                        }
+                    }
+                    for (i = 0; i < 8; i++) {
+                        uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
+                        for (j = 0; j < 8; j++) {
+                            tmp_cr[j] = 1 << (bit_depth - 1);
+                        }
+                    }
+                } else {
+                    for (i = 0; i < 8; i++) {
+                        uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
+                        for (j = 0; j < 8; j++)
+                            tmp_cb[j] = get_bits(&gb, bit_depth);
+                    }
+                    for (i = 0; i < 8; i++) {
+                        uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
+                        for (j = 0; j < 8; j++)
+                            tmp_cr[j] = get_bits(&gb, bit_depth);
+                    }
                 }
             }
         } else {
@@ -1867,9 +1882,16 @@ static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple, i
                 memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
             }
             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
-                for (i=0; i<8; i++) {
-                    memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
-                    memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
+                if (!h->sps.chroma_format_idc) {
+                    for (i = 0; i < 8; i++) {
+                        memset(dest_cb + i*uvlinesize, 128, 8);
+                        memset(dest_cr + i*uvlinesize, 128, 8);
+                    }
+                } else {
+                    for (i = 0; i < 8; i++) {
+                        memcpy(dest_cb + i*uvlinesize, h->mb + 128 + i*4,  8);
+                        memcpy(dest_cr + i*uvlinesize, h->mb + 160 + i*4,  8);
+                    }
                 }
             }
         }