1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <fstream>
#include <vector>
#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 {
void AVFrameDeleter(AVFrame* ptr) {
av_frame_unref(ptr);
av_free(ptr);
}
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
AVFrame* av_frame{nullptr};
avcodec_send_packet(av_codec_ctx, nullptr);
av_frame = av_frame_alloc();
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 {}", 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 {}", current_codec);
return;
}
av_codec_ctx = avcodec_alloc_context3(av_codec);
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.");
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
AVFramePtr frame = AVFramePtr{av_frame_alloc(), AVFrameDeleter};
avcodec_receive_frame(av_codec_ctx, frame.get());
av_frames.push(std::move(frame));
// Limit queue to 10 frames. Workaround for ZLA decode and queue spam
if (av_frames.size() > 10) {
av_frames.pop();
}
}
}
AVFramePtr Codec::GetCurrentFrame() {
// Sometimes VIC will request more frames than have been decoded.
// in this case, return a nullptr and don't overwrite previous frame data
if (av_frames.empty()) {
return AVFramePtr{nullptr, AVFrameDeleter};
}
AVFramePtr frame = std::move(av_frames.front());
av_frames.pop();
return frame;
}
NvdecCommon::VideoCodec Codec::GetCurrentCodec() const {
return current_codec;
}
} // namespace Tegra
|
