From: Paul Higgs <paul_higgs@hotmail.com>
To: "ffmpeg-devel@ffmpeg.org" <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] AVS3: add support for AVS3 High profile - same syntax as AVS3 Main profile
Date: Sat, 26 Feb 2022 05:50:39 +0000
Message-ID: <TYCP286MB1969642C53975AF422729053EA3F9@TYCP286MB1969.JPNP286.PROD.OUTLOOK.COM> (raw)
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@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
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next reply other threads:[~2022-02-26 5:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-26 5:50 Paul Higgs [this message]
2022-02-26 7:18 ` lance.lmwang
2022-02-26 7:48 ` Paul Higgs
2022-02-26 12:18 ` lance.lmwang
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