bb10d3d5a1
Add a hwdevice type for use with V4L2 Request API stateless decoding. AVV4L2RequestFramesContext is expected to be filled with a V4L2 coded pixel format and optional codec-specific extended controls before an AVHWFramesContext is initialized. Once initialized AVV4L2RequestFramesContextInternal describe the opened V4L2 stateless decoder session, with details about media/video file descriptors, formats of CAPTURE/OUTPUT queues and buffer pools for creating CAPTURE/OUTPUT buffers. AVHWFramesContext.pool defaults to create frame descriptors around a CAPTURE buffer, and frames are returned with AVFrame.data[0] pointing to a AVDRMFrameDescriptor and AVFrame.data[1] the CAPTURE buffer index. Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_HWCONTEXT_V4L2REQUEST_H
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#define AVUTIL_HWCONTEXT_V4L2REQUEST_H
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#include <stdint.h>
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#include <linux/videodev2.h>
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/**
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* @file
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* An API-specific header for AV_HWDEVICE_TYPE_V4L2REQUEST.
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*/
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typedef struct AVV4L2RequestFramesContextInternal AVV4L2RequestFramesContextInternal;
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/**
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* V4L2 Request API frames context.
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*
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* This struct is allocated as AVHWFramesContext.hwctx
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*/
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typedef struct AVV4L2RequestFramesContext {
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/**
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* Internal context for the initialized V4L2 stateless decoder/encoder session.
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*/
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AVV4L2RequestFramesContextInternal *internal;
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/**
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* V4L2_PIX_FMT_* coded pixel format to set on the OUTPUT queue (decoders)
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* or the CAPTURE queue (encoders) during initialization.
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*
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* This field must be set by caller before av_hwframe_ctx_init() is called.
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*/
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uint32_t pixelformat;
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/**
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* Optional bit depth of the frame pixel format, e.g. 8 or 10.
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*
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* This field should be set by caller before av_hwframe_ctx_init() is called,
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* the field will be updated to match the selected frame pixel format after
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* successful initialization.
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*/
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uint32_t bit_depth;
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/**
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* Optional codec-specific extended controls to be set during initialization.
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*
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* These fields should be set by caller before av_hwframe_ctx_init() is called,
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* fields are reset to NULL and 0 after successful initialization.
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*/
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struct v4l2_ext_control *init_controls;
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int nb_init_controls;
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} AVV4L2RequestFramesContext;
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#endif /* AVUTIL_HWCONTEXT_V4L2REQUEST_H */
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