From: Paul Higgs <paul_higgs@hotmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] AVS3: add support for AVS3 High profile - same syntax as AVS3 Main profile
Date: Sat, 26 Feb 2022 07:48:24 +0000
Message-ID: <TYCP286MB1969A84797E167474C583F17EA3F9@TYCP286MB1969.JPNP286.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20220226071804.GA16790@gmail.com>
> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of
> lance.lmwang@gmail.com
> Sent: 26 February 2022 07:18
> To: ffmpeg-devel@ffmpeg.org
> Subject: Re: [FFmpeg-devel] [PATCH] AVS3: add support for AVS3 High profile
> - same syntax as AVS3 Main profile
>
> On Sat, Feb 26, 2022 at 05:50:39AM +0000, Paul Higgs wrote:
> > 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) {
>
> Please keep sample_precision name, it's unrelated cosmetic change in this
> patch.
>
Changed this because the three bits read in get_bits(&gb,3) are for the encoding precision. sample_precision syntax element was
Skipped previously
> > 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)
>
> The line is too long.
Ok, will wrap before 80 characters
>
> > return 0;
> > } else if (AVS3_ISPIC(state)) {
> > pic++;
> > --
> > 2.30.0.windows.2
> >
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel@ffmpeg.org
> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >
> > To unsubscribe, visit link above, or email
> > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
>
> --
> Thanks,
> Limin Wang
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org
> with subject "unsubscribe".
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next prev parent reply other threads:[~2022-02-26 7:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-26 5:50 Paul Higgs
2022-02-26 7:18 ` lance.lmwang
2022-02-26 7:48 ` Paul Higgs [this message]
2022-02-26 12:18 ` lance.lmwang
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