[FFmpeg-devel] [PATCH] add support for AVS3 High profile - same syntax as AVS3 Main profile

[Paul Higgs]

This patch adds high level syntax support for parsing AVS3 High profile bitstreams. 
Latest AVS3 specification including High profile is available at http://www.avs.org.cn/AVS3_download/en_index.asp

Signed-off-by: Paul Higgs <paul_higgs at hotmail.com>
---
 libavcodec/avs3.h        | 2 ++
 libavcodec/avs3_parser.c | 8 ++++----
 libavformat/avs3dec.c    | 2 +-
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/libavcodec/avs3.h b/libavcodec/avs3.h
index 4189d9b583..c8caa58b0a 100644
--- a/libavcodec/avs3.h
+++ b/libavcodec/avs3.h
@@ -35,6 +35,8 @@
 #define AVS3_FIRST_SLICE_START_CODE  0x00
 #define AVS3_PROFILE_BASELINE_MAIN   0x20
 #define AVS3_PROFILE_BASELINE_MAIN10 0x22
+#define AVS3_PROFILE_BASELINE_HIGH   0x30
+#define AVS3_PROFILE_BASELINE_HIGH10 0x32
 
 #define AVS3_ISPIC(x) ((x) == AVS3_INTRA_PIC_START_CODE || (x) == AVS3_INTER_PIC_START_CODE)
 #define AVS3_ISUNIT(x) ((x) == AVS3_SEQ_START_CODE || AVS3_ISPIC(x))
diff --git a/libavcodec/avs3_parser.c b/libavcodec/avs3_parser.c
index d04d96a03a..483b38fe76 100644
--- a/libavcodec/avs3_parser.c
+++ b/libavcodec/avs3_parser.c
@@ -91,11 +91,11 @@ static void parse_avs3_nal_units(AVCodecParserContext *s, const uint8_t *buf,
             //            sampe_precision(3)
             skip_bits(&gb, 47);
 
-            if (profile == AVS3_PROFILE_BASELINE_MAIN10) {
-                int sample_precision = get_bits(&gb, 3);
-                if (sample_precision == 1) {
+            if (profile == AVS3_PROFILE_BASELINE_MAIN10 || profile == AVS3_PROFILE_BASELINE_HIGH10) {
+                int encoding_precision = get_bits(&gb, 3);
+                if (encoding_precision == 1) {
                     avctx->pix_fmt = AV_PIX_FMT_YUV420P;
-                } else if (sample_precision == 2) {
+                } else if (encoding_precision == 2) {
                     avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE;
                 } else {
                     avctx->pix_fmt = AV_PIX_FMT_NONE;
diff --git a/libavformat/avs3dec.c b/libavformat/avs3dec.c
index 2395df171b..335b5409f5 100644
--- a/libavformat/avs3dec.c
+++ b/libavformat/avs3dec.c
@@ -47,7 +47,7 @@ static int avs3video_probe(const AVProbeData *p)
             }
             if (state == AVS3_SEQ_START_CODE) {
                 seq++;
-                if (*ptr != AVS3_PROFILE_BASELINE_MAIN && *ptr != AVS3_PROFILE_BASELINE_MAIN10)
+                if (*ptr != AVS3_PROFILE_BASELINE_MAIN && *ptr != AVS3_PROFILE_BASELINE_MAIN10 && *ptr != AVS3_PROFILE_BASELINE_HIGH && *ptr != AVS3_PROFILE_BASELINE_HIGH10)
                     return 0;
             } else if (AVS3_ISPIC(state)) {
                 pic++;
-- 
2.30.0.windows.2