From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47D62C433FF for ; Mon, 12 Aug 2019 19:35:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1917F206C1 for ; Mon, 12 Aug 2019 19:35:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726976AbfHLTfx (ORCPT ); Mon, 12 Aug 2019 15:35:53 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:60056 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726681AbfHLTfx (ORCPT ); Mon, 12 Aug 2019 15:35:53 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: ezequiel) with ESMTPSA id 25B88283CDC From: Ezequiel Garcia To: linux-media@vger.kernel.org Cc: kernel@collabora.com, Nicolas Dufresne , Tomasz Figa , linux-rockchip@lists.infradead.org, Heiko Stuebner , Jonas Karlman , Philipp Zabel , Boris Brezillon , Paul Kocialkowski , Alexandre Courbot , fbuergisser@chromium.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 03/11] media: uapi: h264: Add the concept of decoding mode Date: Mon, 12 Aug 2019 16:35:14 -0300 Message-Id: <20190812193522.10911-4-ezequiel@collabora.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190812193522.10911-1-ezequiel@collabora.com> References: <20190812193522.10911-1-ezequiel@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Boris Brezillon Some stateless decoders don't support per-slice decoding granularity (or at least not in a way that would make them efficient or easy to use). Expose a menu to control the supported decoding modes. Drivers are allowed to support only one decoding but they can support both too. Signed-off-by: Boris Brezillon Reviewed-by: Paul Kocialkowski Tested-by: Philipp Zabel --- Changes in v5: * Improve specification as suggested by Hans. Changes in v4: * Typos/rewording fixes Changes in v3: * s/per-{slice,frame} decoding/{slice,frame}-based decoding/ * Add Paul's R-b Changes in v2: * Allow decoding multiple slices in per-slice decoding mode * Minor doc improvement/fixes --- .../media/uapi/v4l/ext-ctrls-codec.rst | 47 ++++++++++++++++++- .../media/uapi/v4l/pixfmt-compressed.rst | 3 +- drivers/media/v4l2-core/v4l2-ctrls.c | 9 ++++ include/media/h264-ctrls.h | 11 +++++ 4 files changed, 68 insertions(+), 2 deletions(-) diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst index c5f39dd50043..568390273fde 100644 --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst @@ -1747,6 +1747,11 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - * - __u32 - ``size`` - + * - __u32 + - ``start_byte_offset`` + - Where the slice payload starts in the output buffer. Useful when the + OUTPUT buffer contains more than one slice (some codecs need to know + where each slice starts in this buffer). * - __u32 - ``header_bit_size`` - @@ -1930,7 +1935,10 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - - * - __u16 - ``num_slices`` - - Number of slices needed to decode the current frame + - Number of slices needed to decode the current frame/field. When + operating in slice-based decoding mode (see + :c:type:`v4l2_mpeg_video_h264_decoding_mode`), this field + should always be set to one. * - __u16 - ``nal_ref_idc`` - NAL reference ID value coming from the NAL Unit header @@ -2021,6 +2029,43 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - - 0x00000004 - The DPB entry is a long term reference frame +``V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE (enum)`` + Specifies the decoding mode to use. Currently exposes slice-based and + frame-based decoding but new modes might be added later on. + This control is used to complement V4L2_PIX_FMT_H264_SLICE + pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE + are required to set this control in order to specify the decoding mode + that is expected for the buffer. + Drivers may expose a single or multiple decoding modes, depending + on what they can support. + + .. note:: + + This menu control is not yet part of the public kernel API and + it is expected to change. + +.. c:type:: v4l2_mpeg_video_h264_decoding_mode + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_MPEG_VIDEO_H264_SLICE_BASED_DECODING`` + - 0 + - The decoding is done at the slice granularity. + v4l2_ctrl_h264_decode_params->num_slices should be set to 1. + The OUTPUT buffer must contain a single slice. + * - ``V4L2_MPEG_VIDEO_H264_FRAME_BASED_DECODING`` + - 1 + - The decoding is done at the frame granularity. + v4l2_ctrl_h264_decode_params->num_slices should be set to the number of + slices forming a frame. + The OUTPUT buffer must contain all slices needed to decode the + frame. The OUTPUT buffer must also contain both fields. + .. _v4l2-mpeg-mpeg2: ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)`` diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst index 9b65473a2288..50557c85d99d 100644 --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst @@ -61,7 +61,8 @@ Compressed Formats stateless video decoders that implement an H264 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). Metadata associated with the frame to decode are required to - be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``, + be passed through the ``V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE``, + ``V4L2_CID_MPEG_VIDEO_H264_SPS``, ``V4L2_CID_MPEG_VIDEO_H264_PPS``, ``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``, ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index cd1ae016706f..c3194299bfac 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -402,6 +402,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id) "Explicit", NULL, }; + static const char * const h264_decoding_mode[] = { + "Slice-Based", + "Frame-Based", + NULL, + }; static const char * const mpeg_mpeg2_level[] = { "Low", "Main", @@ -633,6 +638,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id) return h264_fp_arrangement_type; case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return h264_fmo_map_type; + case V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE: + return h264_decoding_mode; case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: return mpeg_mpeg2_level; case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: @@ -852,6 +859,7 @@ const char *v4l2_ctrl_get_name(u32 id) case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX: return "H264 Scaling Matrix"; case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS: return "H264 Slice Parameters"; case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS: return "H264 Decode Parameters"; + case V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE: return "H264 Decoding Mode"; case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: return "MPEG2 Level"; case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: return "MPEG2 Profile"; case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value"; @@ -1220,6 +1228,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type, case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: + case V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE: case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h index 6160a69c0143..e6c510877f67 100644 --- a/include/media/h264-ctrls.h +++ b/include/media/h264-ctrls.h @@ -26,6 +26,7 @@ #define V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (V4L2_CID_MPEG_BASE+1002) #define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (V4L2_CID_MPEG_BASE+1003) #define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (V4L2_CID_MPEG_BASE+1004) +#define V4L2_CID_MPEG_VIDEO_H264_DECODING_MODE (V4L2_CID_MPEG_BASE+1005) /* enum v4l2_ctrl_type type values */ #define V4L2_CTRL_TYPE_H264_SPS 0x0110 @@ -33,6 +34,12 @@ #define V4L2_CTRL_TYPE_H264_SCALING_MATRIX 0x0112 #define V4L2_CTRL_TYPE_H264_SLICE_PARAMS 0x0113 #define V4L2_CTRL_TYPE_H264_DECODE_PARAMS 0x0114 +#define V4L2_CTRL_TYPE_H264_DECODING_MODE 0x0115 + +enum v4l2_mpeg_video_h264_decoding_mode { + V4L2_MPEG_VIDEO_H264_SLICE_BASED_DECODING, + V4L2_MPEG_VIDEO_H264_FRAME_BASED_DECODING, +}; #define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG 0x01 #define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG 0x02 @@ -125,6 +132,10 @@ struct v4l2_h264_pred_weight_table { struct v4l2_ctrl_h264_slice_params { /* Size in bytes, including header */ __u32 size; + + /* Offset in bytes to the start of slice in the OUTPUT buffer. */ + __u32 start_byte_offset; + /* Offset in bits to slice_data() from the beginning of this slice. */ __u32 header_bit_size; -- 2.22.0