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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-296509682bfsm155611875ad.4.2025.11.10.09.21.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Nov 2025 09:21:48 -0800 (PST) Message-ID: <33fcfc82-14c9-49fb-89b7-657b7ac640a2@oss.qualcomm.com> Date: Mon, 10 Nov 2025 09:21:41 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 1/5] media: uapi: videodev2: Add support for AV1 stateful decoder To: Nicolas Dufresne , Mauro Carvalho Chehab , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, kernel test robot , Bryan O'Donoghue References: <20251109-av1d_stateful_v3-v6-0-4a9bde86025a@oss.qualcomm.com> <20251109-av1d_stateful_v3-v6-1-4a9bde86025a@oss.qualcomm.com> <2a458127834680ea8e4bc74639536a20494f1357.camel@collabora.com> Content-Language: en-US From: Deepa Guthyappa Madivalara In-Reply-To: <2a458127834680ea8e4bc74639536a20494f1357.camel@collabora.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: uYTZsQmwWeBGGInbiFoCiQuLUKCeCBpA X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEwMDE0NyBTYWx0ZWRfXzNhCP+aUi3Ip tsPkr1wm5C0L4ANXowfLyRGeR8yeEoqTCOv2LyQQmA/9ua+DTeUW3C2g/RKPtrFVqf17GRlZ+oo Jwfi72+z5saAk6YjH6hMgCmFzmD5ucuD191yzph4Fh/mybPeWLRL0gWWYKdXBcYiEo2fiaA8jh7 hUmw+NDl2EUxqBjqiSrNOMAh17s1BknwSDsAzw43vn9pMcQ16s/+Vf1L1KKMfWi0C7lXzBb5zOx 5utFb28H3G4L/3eIBIg1u2nb1DW+T9mjoIH/+yR0iju5+Z4QVvqKdbIksP27zYYYxBUtskLLqY/ yzqb1+lGqQRBtcyZGB+nwHHk0nSOjALq1R81lHwm2X0fCEQxdlKaafBGE0JTjAmpuaxVLv4x0uH 0s2lZkGbA+oWoCiOVd1kQEXpQBI+sw== X-Authority-Analysis: v=2.4 cv=UZJciaSN c=1 sm=1 tr=0 ts=69121f2e cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=KKAkSRfTAAAA:8 a=QX4gbG5DAAAA:8 a=EUspDBNiAAAA:8 a=lfnHfZgCvS1hSVXH-IcA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 a=cvBusfyB2V15izCimMoJ:22 a=AbAUZ8qAyYyZVLSsDulk:22 X-Proofpoint-GUID: uYTZsQmwWeBGGInbiFoCiQuLUKCeCBpA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-10_06,2025-11-10_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 malwarescore=0 impostorscore=0 adultscore=0 priorityscore=1501 spamscore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511100147 On 11/10/2025 5:59 AM, Nicolas Dufresne wrote: > Le dimanche 09 novembre 2025 à 21:05 -0800, Deepa Guthyappa Madivalara a écrit : >> Introduce a new pixel format, V4L2_PIX_FMT_AV1, to the >> Video4Linux2(V4L2) API. This format is intended for AV1 >> bitstreams in stateful decoding/encoding workflows. >> The fourcc code 'AV10' is used to distinguish >> this format from the existing V4L2_PIX_FMT_AV1_FRAME, >> which is used for stateless AV1 decoder implementation. >> >> Reviewed-by: Bryan O'Donoghue >> Reviewed-by: Nicolas Dufresne >> Signed-off-by: Deepa Guthyappa Madivalara >> --- >>  Documentation/userspace-api/media/v4l/pixfmt-compressed.rst | 8 ++++++++ >>  include/uapi/linux/videodev2.h                              | 1 + >>  2 files changed, 9 insertions(+) >> >> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst >> index c7efb0465db6480fe35be8557728c196e0e530f4..6ca63f35b801b8aae142b69eddfaa549a5568a3f 100644 >> --- a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst >> +++ b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst >> @@ -275,6 +275,14 @@ Compressed Formats >>          of macroblocks to decode a full corresponding frame to the matching >>          capture buffer. >> >> +    * .. _V4L2-PIX-FMT-AV1: >> + >> +      - ``V4L2_PIX_FMT_AV1`` >> +      - 'AV01' >> +      - AV1 compressed video frame. This format is adapted for implementing AV1 >> +        pipeline. The decoder implements stateful video decoder and expects one >> +        Temporal Unit per buffer from OBU Stream. > This should be something like, "one temporal unit per buffer in OBU stream > format." > > Nicolas Updated in v7. Thank you. >> +        The encoder generates one Temporal Unit per buffer. >>  .. raw:: latex >> >>      \normalsize >> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h >> index becd08fdbddb857f8f2bf205d2164dc6e20e80b2..cf0b71bbe0f9d397e1e6c88433a0fc3ba11fb947 100644 >> --- a/include/uapi/linux/videodev2.h >> +++ b/include/uapi/linux/videodev2.h >> @@ -775,6 +775,7 @@ struct v4l2_pix_format { >>  #define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */ >>  #define V4L2_PIX_FMT_HEVC_SLICE v4l2_fourcc('S', '2', '6', '5') /* HEVC parsed slices */ >>  #define V4L2_PIX_FMT_AV1_FRAME v4l2_fourcc('A', 'V', '1', 'F') /* AV1 parsed frame */ >> +#define V4L2_PIX_FMT_AV1      v4l2_fourcc('A', 'V', '0', '1') /* AV1 */ >>  #define V4L2_PIX_FMT_SPK      v4l2_fourcc('S', 'P', 'K', '0') /* Sorenson Spark */ >>  #define V4L2_PIX_FMT_RV30     v4l2_fourcc('R', 'V', '3', '0') /* RealVideo 8 */ >>  #define V4L2_PIX_FMT_RV40     v4l2_fourcc('R', 'V', '4', '0') /* RealVideo 9 & 10 */