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Copy pathhwaccel_vaapi.cpp
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174 lines (153 loc) · 6.4 KB
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/**
* @file hwaccel_vaapi.cpp
* @author Martin Piatka <piatka@cesnet.cz>
*
* @brief This file contains functions related to hw acceleration
*/
/*
* Copyright (c) 2018-2026 CESNET, zájmové sdružení právnických osob
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by CESNET z.s.p.o.
*
* 4. Neither the name of the CESNET nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
extern "C" {
#include <libavcodec/version.h>
#include <libavutil/pixdesc.h>
#include <libavutil/hwcontext_vaapi.h>
}
#include "debug.h"
#include "utils/misc.h"
#include "hwaccel_libav_common.h"
#include "hwaccel_vaapi.h"
#include "libavcodec/lavc_common.h"
#define MOD_NAME "[vaapi] "
namespace{
using AVFrame_uniq = std::unique_ptr<AVFrame, deleter_from_fcn_double_ptr<av_frame_free>>;
using AVBufferRef_uniq = std::unique_ptr<AVBufferRef, deleter_from_fcn_double_ptr<av_buffer_unref>>;
using AVHWFramesConstraints_uniq = std::unique_ptr<AVHWFramesConstraints, deleter_from_fcn_double_ptr<av_hwframe_constraints_free>>;
constexpr int DEFAULT_SURFACES = 20;
AVPixelFormat get_nv12_or_first(const AVPixelFormat *fmts){
for(int i = 0; fmts[i] != AV_PIX_FMT_NONE; i++){
if(fmts[i] == AV_PIX_FMT_NV12){
return AV_PIX_FMT_NV12;
}
}
return fmts[0];
}
/**
* Returns first SW format from valid_sw_formats. This is usually
* AV_PIX_FMT_YUV420P or AV_PIX_FMT_NV12.
*
* The code borrows heavily from mpv
* <https://github.com/mpv-player/mpv/blob/master/video/out/hwdec/hwdec_vaapi.c>
* namely from function try_format_config().
*/
AVPixelFormat get_sw_format(AVBufferRef *device_ref){
AVHWFramesConstraints_uniq fc(av_hwdevice_get_hwframe_constraints(device_ref, nullptr));
if (!fc) {
MSG(ERROR, "failed to retrieve libavutil frame constraints\n");
return AV_PIX_FMT_NONE;
}
/*
* We need a hwframe_ctx to be able to get the valid formats, but to
* initialise it, we need a format, so we get the first format from the
* hwconfig. We don't care about the other formats in the config because
* the transfer formats list will already include them.
*/
AVBufferRef_uniq fref(av_hwframe_ctx_alloc(device_ref));
if (!fref) {
MSG(ERROR, "failed to alloc libavutil frame context\n");
return AV_PIX_FMT_NONE;
}
auto fctx = reinterpret_cast<AVHWFramesContext *>(fref->data);
constexpr int dummy_size = 128; ///< just some valid size
fctx->format = AV_PIX_FMT_VAAPI;
fctx->sw_format = get_nv12_or_first(fc->valid_sw_formats);
fctx->width = dummy_size;
fctx->height = dummy_size;
if (av_hwframe_ctx_init(fref.get()) < 0) {
MSG(ERROR, "failed to init libavutil frame context\n");
return AV_PIX_FMT_NONE;
}
std::unique_ptr<AVPixelFormat, deleter_from_fcn<av_free>> fmts;
int rc = av_hwframe_transfer_get_formats(
fref.get(), AV_HWFRAME_TRANSFER_DIRECTION_FROM, out_ptr(fmts), 0);
if(rc){
MSG(ERROR, "failed to get libavutil frame context supported formats\n");
return AV_PIX_FMT_NONE;
}
MSG(DEBUG, "Available HW layouts: %s\n", get_avpixfmts_names(fmts.get()));
return get_nv12_or_first(fmts.get());
}
}
int vaapi_init(AVCodecContext *s, hw_accel_state *state, codec_t /*out_codec*/){
AVBufferRef_uniq device_ref;
int ret = create_hw_device_ctx(AV_HWDEVICE_TYPE_VAAPI, out_ptr(device_ref));
if(ret < 0){
return -1;
}
int decode_surfaces = DEFAULT_SURFACES;
if (s->active_thread_type & FF_THREAD_FRAME)
decode_surfaces += s->thread_count;
auto sw_format = get_sw_format(device_ref.get());
if (sw_format == AV_PIX_FMT_NONE) {
sw_format = s->sw_pix_fmt;
MSG(WARNING, "Using fallback HW frames layout: %s\n",
av_get_pix_fmt_name(s->sw_pix_fmt));
} else{
MSG(VERBOSE, "Selected HW frames layout: %s\n", av_get_pix_fmt_name(sw_format));
}
AVBufferRef_uniq hw_frames_ctx;
ret = create_hw_frame_ctx(device_ref.get(),
s->coded_width,
s->coded_height,
AV_PIX_FMT_VAAPI,
sw_format,
decode_surfaces,
out_ptr(hw_frames_ctx));
if(ret < 0){
return -1;
}
AVFrame_uniq tmp_frame(av_frame_alloc());
if(!tmp_frame){
return -1;
}
s->hw_frames_ctx = hw_frames_ctx.release();
state->type = HWACCEL_VAAPI;
state->copy = true;
state->ctx = nullptr;
state->tmp_frame = tmp_frame.release();
state->uninit = nullptr;
return 0;
}