b11df48149
Add common support for decoding using the V4L2 Request API. Basic flow for decoding follow the kernel Memory-to-memory Stateless Video Decoder Interface > Decoding [1]. A codec hwaccel typically handle decoding as follow: In start_frame next OUTPUT buffer and its related request object is picked from a circular queue and any codec specific CONTROLs is prepared. In decode_slice the slice bitstream data is appended to the OUTPUT buffer. In end_frame a CAPTURE buffer tied to the AVFrame is queued, it will be used as the decoding target by the driver / hw decoder. The prepared codec specific CONTROLs get queued as part of the request object. Finally the request object is submitted for decoding. For slice based hw decoders only the request for the final slice of the frame is submitted in end_frame, remaining is submitted in decode_slice. [1] https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-stateless-decoder.html#decoding Co-developed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Co-developed-by: Alex Bee <knaerzche@gmail.com> Signed-off-by: Alex Bee <knaerzche@gmail.com> Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
103 lines
4.2 KiB
C
103 lines
4.2 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 AVCODEC_HWCONFIG_H
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#define AVCODEC_HWCONFIG_H
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#include "avcodec.h"
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#include "hwaccels.h"
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typedef struct AVCodecHWConfigInternal {
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/**
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* This is the structure which will be returned to the user by
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* avcodec_get_hw_config().
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*/
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AVCodecHWConfig public;
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/**
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* If this configuration uses a hwaccel, a pointer to it.
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* If not, NULL.
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*/
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const struct FFHWAccel *hwaccel;
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} AVCodecHWConfigInternal;
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void ff_hwaccel_uninit(AVCodecContext *avctx);
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// These macros are used to simplify AVCodecHWConfigInternal definitions.
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#define HW_CONFIG_HWACCEL(device, frames, ad_hoc, format, device_type_, name) \
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&(const AVCodecHWConfigInternal) { \
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.public = { \
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.pix_fmt = AV_PIX_FMT_ ## format, \
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.methods = (device ? AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX : 0) | \
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(frames ? AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX : 0) | \
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(ad_hoc ? AV_CODEC_HW_CONFIG_METHOD_AD_HOC : 0), \
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.device_type = AV_HWDEVICE_TYPE_ ## device_type_, \
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}, \
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.hwaccel = &name, \
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}
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#define HW_CONFIG_INTERNAL(format) \
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&(const AVCodecHWConfigInternal) { \
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.public = { \
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.pix_fmt = AV_PIX_FMT_ ## format, \
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.methods = AV_CODEC_HW_CONFIG_METHOD_INTERNAL, \
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.device_type = AV_HWDEVICE_TYPE_NONE, \
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}, \
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.hwaccel = NULL, \
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}
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#define HWACCEL_DXVA2(codec) \
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HW_CONFIG_HWACCEL(1, 1, 1, DXVA2_VLD, DXVA2, ff_ ## codec ## _dxva2_hwaccel)
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#define HWACCEL_D3D11VA2(codec) \
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HW_CONFIG_HWACCEL(1, 1, 0, D3D11, D3D11VA, ff_ ## codec ## _d3d11va2_hwaccel)
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#define HWACCEL_NVDEC(codec) \
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HW_CONFIG_HWACCEL(1, 1, 0, CUDA, CUDA, ff_ ## codec ## _nvdec_hwaccel)
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#define HWACCEL_VAAPI(codec) \
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HW_CONFIG_HWACCEL(1, 1, 1, VAAPI, VAAPI, ff_ ## codec ## _vaapi_hwaccel)
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#define HWACCEL_VDPAU(codec) \
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HW_CONFIG_HWACCEL(1, 1, 1, VDPAU, VDPAU, ff_ ## codec ## _vdpau_hwaccel)
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#define HWACCEL_VIDEOTOOLBOX(codec) \
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HW_CONFIG_HWACCEL(1, 1, 1, VIDEOTOOLBOX, VIDEOTOOLBOX, ff_ ## codec ## _videotoolbox_hwaccel)
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#define HWACCEL_VULKAN(codec) \
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HW_CONFIG_HWACCEL(1, 1, 1, VULKAN, VULKAN, ff_ ## codec ## _vulkan_hwaccel)
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#define HWACCEL_D3D11VA(codec) \
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HW_CONFIG_HWACCEL(0, 0, 1, D3D11VA_VLD, NONE, ff_ ## codec ## _d3d11va_hwaccel)
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#define HWACCEL_D3D12VA(codec) \
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HW_CONFIG_HWACCEL(1, 1, 0, D3D12, D3D12VA, ff_ ## codec ## _d3d12va_hwaccel)
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#define HWACCEL_V4L2REQUEST(codec) \
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HW_CONFIG_HWACCEL(1, 0, 0, DRM_PRIME, V4L2REQUEST, ff_ ## codec ## _v4l2request_hwaccel)
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#define HW_CONFIG_ENCODER(device, frames, ad_hoc, format, device_type_) \
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&(const AVCodecHWConfigInternal) { \
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.public = { \
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.pix_fmt = AV_PIX_FMT_ ## format, \
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.methods = (device ? AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX : 0) | \
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(frames ? AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX : 0) | \
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(ad_hoc ? AV_CODEC_HW_CONFIG_METHOD_AD_HOC : 0), \
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.device_type = AV_HWDEVICE_TYPE_ ## device_type_, \
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}, \
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.hwaccel = NULL, \
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}
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#define HW_CONFIG_ENCODER_DEVICE(format, device_type_) \
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HW_CONFIG_ENCODER(1, 0, 0, format, device_type_)
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#define HW_CONFIG_ENCODER_FRAMES(format, device_type_) \
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HW_CONFIG_ENCODER(0, 1, 0, format, device_type_)
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#endif /* AVCODEC_HWCONFIG_H */
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