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// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <fstream>
#include "common/assert.h"
#include "video_core/command_classes/codecs/codec.h"
#include "video_core/command_classes/codecs/h264.h"
#include "video_core/command_classes/codecs/vp9.h"
#include "video_core/gpu.h"
#include "video_core/memory_manager.h"
extern "C" {
#include <libavutil/opt.h>
}
namespace Tegra {
Codec::Codec(GPU& gpu_)
: gpu(gpu_), h264_decoder(std::make_unique<Decoder::H264>(gpu)),
vp9_decoder(std::make_unique<Decoder::VP9>(gpu)) {}
Codec::~Codec() {
if (!initialized) {
return;
}
// Free libav memory
avcodec_send_packet(av_codec_ctx, nullptr);
avcodec_receive_frame(av_codec_ctx, av_frame);
avcodec_flush_buffers(av_codec_ctx);
av_frame_unref(av_frame);
av_free(av_frame);
avcodec_close(av_codec_ctx);
}
void Codec::SetTargetCodec(NvdecCommon::VideoCodec codec) {
LOG_INFO(Service_NVDRV, "NVDEC video codec initialized to {}", static_cast<u32>(codec));
current_codec = codec;
}
void Codec::StateWrite(u32 offset, u64 arguments) {
u8* const state_offset = reinterpret_cast<u8*>(&state) + offset * sizeof(u64);
std::memcpy(state_offset, &arguments, sizeof(u64));
}
void Codec::Decode() {
bool is_first_frame = false;
if (!initialized) {
if (current_codec == NvdecCommon::VideoCodec::H264) {
av_codec = avcodec_find_decoder(AV_CODEC_ID_H264);
} else if (current_codec == NvdecCommon::VideoCodec::Vp9) {
av_codec = avcodec_find_decoder(AV_CODEC_ID_VP9);
} else {
LOG_ERROR(Service_NVDRV, "Unknown video codec {}", static_cast<u32>(current_codec));
return;
}
av_codec_ctx = avcodec_alloc_context3(av_codec);
av_frame = av_frame_alloc();
av_opt_set(av_codec_ctx->priv_data, "tune", "zerolatency", 0);
// TODO(ameerj): libavcodec gpu hw acceleration
const auto av_error = avcodec_open2(av_codec_ctx, av_codec, nullptr);
if (av_error < 0) {
LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed.");
av_frame_unref(av_frame);
av_free(av_frame);
avcodec_close(av_codec_ctx);
return;
}
initialized = true;
is_first_frame = true;
}
bool vp9_hidden_frame = false;
AVPacket packet{};
av_init_packet(&packet);
std::vector<u8> frame_data;
if (current_codec == NvdecCommon::VideoCodec::H264) {
frame_data = h264_decoder->ComposeFrameHeader(state, is_first_frame);
} else if (current_codec == NvdecCommon::VideoCodec::Vp9) {
frame_data = vp9_decoder->ComposeFrameHeader(state);
vp9_hidden_frame = vp9_decoder->WasFrameHidden();
}
packet.data = frame_data.data();
packet.size = static_cast<int>(frame_data.size());
avcodec_send_packet(av_codec_ctx, &packet);
if (!vp9_hidden_frame) {
// Only receive/store visible frames
avcodec_receive_frame(av_codec_ctx, av_frame);
}
}
AVFrame* Codec::GetCurrentFrame() {
return av_frame;
}
const AVFrame* Codec::GetCurrentFrame() const {
return av_frame;
}
NvdecCommon::VideoCodec Codec::GetCurrentCodec() const {
return current_codec;
}
} // namespace Tegra
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