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Sunshine/sunshine/video.cpp

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//
// Created by loki on 6/6/19.
//
#include <atomic>
#include <bitset>
#include <thread>
extern "C" {
#include <libswscale/swscale.h>
}
#include "config.h"
#include "main.h"
#include "platform/common.h"
#include "round_robin.h"
#include "sync.h"
#include "video.h"
#ifdef _WIN32
extern "C" {
#include <libavutil/hwcontext_d3d11va.h>
}
#endif
namespace video {
using namespace std::literals;
void free_ctx(AVCodecContext *ctx) {
avcodec_free_context(&ctx);
}
void free_frame(AVFrame *frame) {
av_frame_free(&frame);
}
void free_buffer(AVBufferRef *ref) {
av_buffer_unref(&ref);
}
namespace nv {
enum class profile_h264_e : int {
baseline,
main,
high,
high_444p,
};
enum class profile_hevc_e : int {
main,
main_10,
rext,
};
} // namespace nv
using ctx_t = util::safe_ptr<AVCodecContext, free_ctx>;
using frame_t = util::safe_ptr<AVFrame, free_frame>;
using buffer_t = util::safe_ptr<AVBufferRef, free_buffer>;
using sws_t = util::safe_ptr<SwsContext, sws_freeContext>;
using img_event_t = std::shared_ptr<safe::event_t<std::shared_ptr<platf::img_t>>>;
platf::dev_type_e map_dev_type(AVHWDeviceType type);
platf::pix_fmt_e map_pix_fmt(AVPixelFormat fmt);
void sw_img_to_frame(const platf::img_t &img, frame_t &frame);
void dxgi_img_to_frame(const platf::img_t &img, frame_t &frame);
util::Either<buffer_t, int> dxgi_make_hwdevice_ctx(platf::hwdevice_t *hwdevice_ctx);
util::Either<buffer_t, int> make_hwdevice_ctx(AVHWDeviceType type, void *hwdevice_ctx);
int hwframe_ctx(ctx_t &ctx, buffer_t &hwdevice, AVPixelFormat format);
class swdevice_t : public platf::hwdevice_t {
public:
int convert(platf::img_t &img) override {
auto frame = (AVFrame *)data;
av_frame_make_writable(frame);
const int linesizes[2] {
img.row_pitch, 0
};
std::uint8_t *const data[] {
frame->data[0] + offset,
frame->data[1] + offset / 2,
frame->data[2] + offset / 2,
0
};
int ret = sws_scale(sws.get(), (std::uint8_t *const *)&img.data, linesizes, 0, img.height, data, frame->linesize);
if(ret <= 0) {
BOOST_LOG(error) << "Couldn't convert image to required format and/or size"sv;
return -1;
}
return 0;
}
virtual void set_colorspace(std::uint32_t colorspace, std::uint32_t color_range) {
sws_setColorspaceDetails(sws.get(),
sws_getCoefficients(SWS_CS_DEFAULT), 0,
sws_getCoefficients(colorspace), color_range - 1,
0, 1 << 16, 1 << 16);
}
/**
* When preserving aspect ratio, ensure that padding is black
*/
int prefill(AVFrame *frame, AVPixelFormat format) {
auto width = frame->width;
auto height = frame->height;
sws_t sws {
sws_getContext(
width, height, AV_PIX_FMT_BGR0,
width, height, format,
SWS_LANCZOS | SWS_ACCURATE_RND,
nullptr, nullptr, nullptr)
};
if(!sws) {
return -1;
}
util::buffer_t<std::uint32_t> img { (std::size_t)(width * height) };
std::fill(std::begin(img), std::end(img), 0);
const int linesizes[2] {
width, 0
};
av_frame_make_writable(frame);
auto data = img.begin();
int ret = sws_scale(sws.get(), (std::uint8_t *const *)&data, linesizes, 0, height, frame->data, frame->linesize);
if(ret <= 0) {
BOOST_LOG(error) << "Couldn't convert image to required format and/or size"sv;
return -1;
}
return 0;
}
int init(int in_width, int in_height, AVFrame *frame, AVPixelFormat format) {
if(prefill(frame, format)) {
return -1;
}
auto out_width = frame->width;
auto out_height = frame->height;
// Ensure aspect ratio is maintained
auto scalar = std::fminf((float)out_width / in_width, (float)out_height / in_height);
out_width = in_width * scalar;
out_height = in_height * scalar;
// result is always positive
auto offsetX = (frame->width - out_width) / 2;
auto offsetY = (frame->height - out_height) / 2;
offset = offsetX + offsetY * frame->width;
sws.reset(sws_getContext(
in_width, in_height, AV_PIX_FMT_BGR0,
out_width, out_height, format,
SWS_LANCZOS | SWS_ACCURATE_RND,
nullptr, nullptr, nullptr));
data = frame;
return sws ? 0 : -1;
}
~swdevice_t() override {}
sws_t sws;
// offset of input image to output frame in pixels
int offset;
};
struct encoder_t {
std::string_view name;
enum flag_e {
PASSED, // Is supported
REF_FRAMES_RESTRICT, // Set maximum reference frames
REF_FRAMES_AUTOSELECT, // Allow encoder to select maximum reference frames (If !REF_FRAMES_RESTRICT --> REF_FRAMES_AUTOSELECT)
DYNAMIC_RANGE,
MAX_FLAGS
};
struct option_t {
KITTY_DEFAULT_CONSTR(option_t)
option_t(const option_t &) = default;
std::string name;
std::variant<int, int *, std::optional<int> *, std::string, std::string *> value;
option_t(std::string &&name, decltype(value) &&value) : name { std::move(name) }, value { std::move(value) } {}
};
struct {
int h264_high;
int hevc_main;
int hevc_main_10;
} profile;
AVHWDeviceType dev_type;
AVPixelFormat dev_pix_fmt;
AVPixelFormat static_pix_fmt;
AVPixelFormat dynamic_pix_fmt;
struct {
std::vector<option_t> options;
std::optional<option_t> crf, qp;
std::string name;
std::bitset<MAX_FLAGS> capabilities;
bool operator[](flag_e flag) const {
return capabilities[(std::size_t)flag];
}
std::bitset<MAX_FLAGS>::reference operator[](flag_e flag) {
return capabilities[(std::size_t)flag];
}
} hevc, h264;
bool system_memory;
bool hevc_mode;
std::function<void(const platf::img_t &, frame_t &)> img_to_frame;
std::function<util::Either<buffer_t, int>(platf::hwdevice_t *hwdevice)> make_hwdevice_ctx;
};
class session_t {
public:
session_t() = default;
session_t(ctx_t &&ctx, frame_t &&frame, util::wrap_ptr<platf::hwdevice_t> &&device) : ctx { std::move(ctx) }, frame { std::move(frame) }, device { std::move(device) } {}
session_t(session_t &&other) noexcept : ctx { std::move(other.ctx) }, frame { std::move(other.frame) }, device { std::move(other.device) } {}
// Ensure objects are destroyed in the correct order
session_t &operator=(session_t &&other) {
device = std::move(other.device);
frame = std::move(other.frame);
ctx = std::move(other.ctx);
return *this;
}
ctx_t ctx;
frame_t frame;
util::wrap_ptr<platf::hwdevice_t> device;
};
struct sync_session_ctx_t {
safe::signal_t *shutdown_event;
safe::signal_t *join_event;
packet_queue_t packets;
idr_event_t idr_events;
config_t config;
int frame_nr;
int key_frame_nr;
void *channel_data;
};
struct sync_session_t {
sync_session_ctx_t *ctx;
std::chrono::steady_clock::time_point next_frame;
std::chrono::nanoseconds delay;
platf::img_t *img_tmp;
std::shared_ptr<platf::hwdevice_t> hwdevice;
session_t session;
};
using encode_session_ctx_queue_t = safe::queue_t<sync_session_ctx_t>;
using encode_e = platf::capture_e;
struct capture_ctx_t {
img_event_t images;
std::chrono::nanoseconds delay;
};
struct capture_thread_async_ctx_t {
std::shared_ptr<safe::queue_t<capture_ctx_t>> capture_ctx_queue;
std::thread capture_thread;
safe::signal_t reinit_event;
const encoder_t *encoder_p;
util::sync_t<std::weak_ptr<platf::display_t>> display_wp;
};
struct capture_thread_sync_ctx_t {
encode_session_ctx_queue_t encode_session_ctx_queue { 30 };
};
int start_capture_sync(capture_thread_sync_ctx_t &ctx);
void end_capture_sync(capture_thread_sync_ctx_t &ctx);
int start_capture_async(capture_thread_async_ctx_t &ctx);
void end_capture_async(capture_thread_async_ctx_t &ctx);
// Keep a reference counter to ensure the capture thread only runs when other threads have a reference to the capture thread
auto capture_thread_async = safe::make_shared<capture_thread_async_ctx_t>(start_capture_async, end_capture_async);
auto capture_thread_sync = safe::make_shared<capture_thread_sync_ctx_t>(start_capture_sync, end_capture_sync);
#ifdef _WIN32
static encoder_t nvenc {
"nvenc"sv,
{ (int)nv::profile_h264_e::high, (int)nv::profile_hevc_e::main, (int)nv::profile_hevc_e::main_10 },
AV_HWDEVICE_TYPE_D3D11VA,
AV_PIX_FMT_D3D11,
AV_PIX_FMT_NV12, AV_PIX_FMT_P010,
{
{ { "forced-idr"s, 1 },
{ "zerolatency"s, 1 },
{ "preset"s, &config::video.nv.preset },
{ "rc"s, &config::video.nv.rc } },
std::nullopt,
std::nullopt,
"hevc_nvenc"s,
},
{ { { "forced-idr"s, 1 },
{ "zerolatency"s, 1 },
{ "preset"s, &config::video.nv.preset },
{ "rc"s, &config::video.nv.rc },
{ "coder"s, &config::video.nv.coder } },
std::nullopt, std::make_optional<encoder_t::option_t>({ "qp"s, &config::video.qp }),
"h264_nvenc"s },
false,
true,
dxgi_img_to_frame,
dxgi_make_hwdevice_ctx
};
static encoder_t amdvce {
"amdvce"sv,
{ FF_PROFILE_H264_HIGH, FF_PROFILE_HEVC_MAIN },
AV_HWDEVICE_TYPE_D3D11VA,
AV_PIX_FMT_D3D11,
AV_PIX_FMT_NV12, AV_PIX_FMT_P010,
{
{ { "header_insertion_mode"s, "idr"s },
{ "gops_per_idr"s, 30 },
{ "usage"s, "ultralowlatency"s },
{ "quality"s, &config::video.amd.quality },
{ "rc"s, &config::video.amd.rc } },
std::nullopt,
std::make_optional<encoder_t::option_t>({ "qp"s, &config::video.qp }),
"hevc_amf"s,
},
{ {
{ "usage"s, "ultralowlatency"s },
{ "quality"s, &config::video.amd.quality },
{ "rc"s, &config::video.amd.rc },
{ "log_to_dbg"s, "1"s },
},
std::nullopt, std::make_optional<encoder_t::option_t>({ "qp"s, &config::video.qp }),
"h264_amf"s },
false,
true,
dxgi_img_to_frame,
dxgi_make_hwdevice_ctx
};
#endif
static encoder_t software {
"software"sv,
{ FF_PROFILE_H264_HIGH, FF_PROFILE_HEVC_MAIN, FF_PROFILE_HEVC_MAIN_10 },
AV_HWDEVICE_TYPE_NONE,
AV_PIX_FMT_NONE,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10,
{ // x265's Info SEI is so long that it causes the IDR picture data to be
// kicked to the 2nd packet in the frame, breaking Moonlight's parsing logic.
// It also looks like gop_size isn't passed on to x265, so we have to set
// 'keyint=-1' in the parameters ourselves.
{
{ "forced-idr"s, 1 },
{ "x265-params"s, "info=0:keyint=-1"s },
{ "preset"s, &config::video.sw.preset },
{ "tune"s, &config::video.sw.tune } },
std::make_optional<encoder_t::option_t>("crf"s, &config::video.crf), std::make_optional<encoder_t::option_t>("qp"s, &config::video.qp),
"libx265"s },
{ { { "preset"s, &config::video.sw.preset },
{ "tune"s, &config::video.sw.tune } },
std::make_optional<encoder_t::option_t>("crf"s, &config::video.crf), std::make_optional<encoder_t::option_t>("qp"s, &config::video.qp),
"libx264"s },
true,
false,
sw_img_to_frame,
nullptr
};
static std::vector<encoder_t> encoders {
#ifdef _WIN32
nvenc,
amdvce,
#endif
software
};
void reset_display(std::shared_ptr<platf::display_t> &disp, AVHWDeviceType type) {
// We try this twice, in case we still get an error on reinitialization
for(int x = 0; x < 2; ++x) {
disp.reset();
disp = platf::display(map_dev_type(type));
if(disp) {
break;
}
std::this_thread::sleep_for(200ms);
}
}
void captureThread(
std::shared_ptr<safe::queue_t<capture_ctx_t>> capture_ctx_queue,
util::sync_t<std::weak_ptr<platf::display_t>> &display_wp,
safe::signal_t &reinit_event,
const encoder_t &encoder) {
std::vector<capture_ctx_t> capture_ctxs;
auto fg = util::fail_guard([&]() {
capture_ctx_queue->stop();
// Stop all sessions listening to this thread
for(auto &capture_ctx : capture_ctxs) {
capture_ctx.images->stop();
}
for(auto &capture_ctx : capture_ctx_queue->unsafe()) {
capture_ctx.images->stop();
}
});
std::chrono::nanoseconds delay = 1s;
auto disp = platf::display(map_dev_type(encoder.dev_type));
if(!disp) {
return;
}
display_wp = disp;
std::vector<std::shared_ptr<platf::img_t>> imgs(12);
auto round_robin = util::make_round_robin<std::shared_ptr<platf::img_t>>(std::begin(imgs), std::end(imgs));
for(auto &img : imgs) {
img = disp->alloc_img();
if(!img) {
BOOST_LOG(error) << "Couldn't initialize an image"sv;
return;
}
}
if(auto capture_ctx = capture_ctx_queue->pop()) {
capture_ctxs.emplace_back(std::move(*capture_ctx));
delay = capture_ctxs.back().delay;
}
auto next_frame = std::chrono::steady_clock::now();
while(capture_ctx_queue->running()) {
while(capture_ctx_queue->peek()) {
capture_ctxs.emplace_back(std::move(*capture_ctx_queue->pop()));
delay = std::min(delay, capture_ctxs.back().delay);
}
auto now = std::chrono::steady_clock::now();
auto &img = *round_robin++;
while(img.use_count() > 1) {}
auto status = disp->snapshot(img.get(), 1000ms, display_cursor);
switch(status) {
case platf::capture_e::reinit: {
reinit_event.raise(true);
// Some classes of images contain references to the display --> display won't delete unless img is deleted
for(auto &img : imgs) {
img.reset();
}
// Some classes of display cannot have multiple instances at once
disp.reset();
// display_wp is modified in this thread only
while(!display_wp->expired()) {
std::this_thread::sleep_for(100ms);
}
while(capture_ctx_queue->running()) {
reset_display(disp, encoder.dev_type);
if(disp) {
break;
}
std::this_thread::sleep_for(200ms);
}
if(!disp) {
return;
}
display_wp = disp;
// Re-allocate images
for(auto &img : imgs) {
img = disp->alloc_img();
if(!img) {
BOOST_LOG(error) << "Couldn't initialize an image"sv;
return;
}
}
reinit_event.reset();
continue;
}
case platf::capture_e::error:
return;
case platf::capture_e::timeout:
std::this_thread::sleep_for(1ms);
continue;
case platf::capture_e::ok:
break;
default:
BOOST_LOG(error) << "Unrecognized capture status ["sv << (int)status << ']';
return;
}
KITTY_WHILE_LOOP(auto capture_ctx = std::begin(capture_ctxs), capture_ctx != std::end(capture_ctxs), {
if(!capture_ctx->images->running()) {
auto tmp_delay = capture_ctx->delay;
capture_ctx = capture_ctxs.erase(capture_ctx);
if(tmp_delay == delay) {
delay = std::min_element(std::begin(capture_ctxs), std::end(capture_ctxs), [](const auto &l, const auto &r) {
return l.delay < r.delay;
})->delay;
}
continue;
}
capture_ctx->images->raise(img);
++capture_ctx;
})
if(next_frame > now) {
std::this_thread::sleep_until(next_frame);
}
next_frame += delay;
}
}
int encode(int64_t frame_nr, ctx_t &ctx, frame_t &frame, packet_queue_t &packets, void *channel_data) {
frame->pts = frame_nr;
/* send the frame to the encoder */
auto ret = avcodec_send_frame(ctx.get(), frame.get());
if(ret < 0) {
char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
BOOST_LOG(error) << "Could not send a frame for encoding: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, ret);
return -1;
}
while(ret >= 0) {
auto packet = std::make_unique<packet_t::element_type>(nullptr);
ret = avcodec_receive_packet(ctx.get(), packet.get());
if(ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
return 0;
}
else if(ret < 0) {
return ret;
}
packet->channel_data = channel_data;
packets->raise(std::move(packet));
}
return 0;
}
std::optional<session_t> make_session(const encoder_t &encoder, const config_t &config, int width, int height, platf::hwdevice_t *hwdevice) {
bool hardware = encoder.dev_type != AV_HWDEVICE_TYPE_NONE;
auto &video_format = config.videoFormat == 0 ? encoder.h264 : encoder.hevc;
if(!video_format[encoder_t::PASSED]) {
BOOST_LOG(error) << encoder.name << ": "sv << video_format.name << " mode not supported"sv;
return std::nullopt;
}
if(config.dynamicRange && !video_format[encoder_t::DYNAMIC_RANGE]) {
BOOST_LOG(error) << video_format.name << ": dynamic range not supported"sv;
return std::nullopt;
}
auto codec = avcodec_find_encoder_by_name(video_format.name.c_str());
if(!codec) {
BOOST_LOG(error) << "Couldn't open ["sv << video_format.name << ']';
return std::nullopt;
}
ctx_t ctx { avcodec_alloc_context3(codec) };
ctx->width = config.width;
ctx->height = config.height;
ctx->time_base = AVRational { 1, config.framerate };
ctx->framerate = AVRational { config.framerate, 1 };
if(config.videoFormat == 0) {
ctx->profile = encoder.profile.h264_high;
}
else if(config.dynamicRange == 0) {
ctx->profile = encoder.profile.hevc_main;
}
else {
ctx->profile = encoder.profile.hevc_main_10;
}
// B-frames delay decoder output, so never use them
ctx->max_b_frames = 0;
// Use an infinite GOP length since I-frames are generated on demand
ctx->gop_size = std::numeric_limits<int>::max();
ctx->keyint_min = ctx->gop_size;
if(config.numRefFrames == 0) {
ctx->refs = video_format[encoder_t::REF_FRAMES_AUTOSELECT] ? 0 : 16;
}
else {
// Some client decoders have limits on the number of reference frames
ctx->refs = video_format[encoder_t::REF_FRAMES_RESTRICT] ? config.numRefFrames : 0;
}
ctx->flags |= (AV_CODEC_FLAG_CLOSED_GOP | AV_CODEC_FLAG_LOW_DELAY);
ctx->flags2 |= AV_CODEC_FLAG2_FAST;
ctx->color_range = (config.encoderCscMode & 0x1) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
int sws_color_space;
switch(config.encoderCscMode >> 1) {
case 0:
default:
// Rec. 601
BOOST_LOG(info) << "Color coding [Rec. 601]"sv;
ctx->color_primaries = AVCOL_PRI_SMPTE170M;
ctx->color_trc = AVCOL_TRC_SMPTE170M;
ctx->colorspace = AVCOL_SPC_SMPTE170M;
sws_color_space = SWS_CS_SMPTE170M;
break;
case 1:
// Rec. 709
BOOST_LOG(info) << "Color coding [Rec. 709]"sv;
ctx->color_primaries = AVCOL_PRI_BT709;
ctx->color_trc = AVCOL_TRC_BT709;
ctx->colorspace = AVCOL_SPC_BT709;
sws_color_space = SWS_CS_ITU709;
break;
case 2:
// Rec. 2020
BOOST_LOG(info) << "Color coding [Rec. 2020]"sv;
ctx->color_primaries = AVCOL_PRI_BT2020;
ctx->color_trc = AVCOL_TRC_BT2020_10;
ctx->colorspace = AVCOL_SPC_BT2020_NCL;
sws_color_space = SWS_CS_BT2020;
break;
}
BOOST_LOG(info) << "Color range: ["sv << ((config.encoderCscMode & 0x1) ? "JPEG"sv : "MPEG"sv) << ']';
AVPixelFormat sw_fmt;
if(config.dynamicRange == 0) {
sw_fmt = encoder.static_pix_fmt;
}
else {
sw_fmt = encoder.dynamic_pix_fmt;
}
buffer_t hwdevice_ctx;
if(hardware) {
ctx->pix_fmt = encoder.dev_pix_fmt;
auto buf_or_error = encoder.make_hwdevice_ctx(hwdevice);
if(buf_or_error.has_right()) {
return std::nullopt;
}
hwdevice_ctx = std::move(buf_or_error.left());
if(hwframe_ctx(ctx, hwdevice_ctx, sw_fmt)) {
return std::nullopt;
}
ctx->slices = config.slicesPerFrame;
}
else /* software */ {
ctx->pix_fmt = sw_fmt;
// Clients will request for the fewest slices per frame to get the
// most efficient encode, but we may want to provide more slices than
// requested to ensure we have enough parallelism for good performance.
ctx->slices = std::max(config.slicesPerFrame, config::video.min_threads);
}
ctx->thread_type = FF_THREAD_SLICE;
ctx->thread_count = ctx->slices;
AVDictionary *options { nullptr };
auto handle_option = [&options](const encoder_t::option_t &option) {
std::visit(
util::overloaded {
[&](int v) { av_dict_set_int(&options, option.name.c_str(), v, 0); },
[&](int *v) { av_dict_set_int(&options, option.name.c_str(), *v, 0); },
[&](std::optional<int> *v) { if(*v) av_dict_set_int(&options, option.name.c_str(), **v, 0); },
[&](const std::string &v) { av_dict_set(&options, option.name.c_str(), v.c_str(), 0); },
[&](std::string *v) { if(!v->empty()) av_dict_set(&options, option.name.c_str(), v->c_str(), 0); } },
option.value);
};
for(auto &option : video_format.options) {
handle_option(option);
}
if(config.bitrate > 500) {
auto bitrate = config.bitrate * 1000;
ctx->rc_max_rate = bitrate;
ctx->rc_buffer_size = bitrate / config.framerate;
ctx->bit_rate = bitrate;
ctx->rc_min_rate = bitrate;
}
else if(video_format.crf && config::video.crf != 0) {
handle_option(*video_format.crf);
}
else if(video_format.qp) {
handle_option(*video_format.qp);
}
else {
BOOST_LOG(error) << "Couldn't set video quality: encoder "sv << encoder.name << " doesn't support either crf or qp"sv;
return std::nullopt;
}
avcodec_open2(ctx.get(), codec, &options);
frame_t frame { av_frame_alloc() };
frame->format = ctx->pix_fmt;
frame->width = ctx->width;
frame->height = ctx->height;
if(hardware) {
frame->hw_frames_ctx = av_buffer_ref(ctx->hw_frames_ctx);
}
else /* software */ {
av_frame_get_buffer(frame.get(), 0);
}
util::wrap_ptr<platf::hwdevice_t> device;
if(!hwdevice->data) {
auto device_tmp = std::make_unique<swdevice_t>();
if(device_tmp->init(width, height, frame.get(), sw_fmt)) {
return std::nullopt;
}
device = std::move(device_tmp);
}
else {
device = hwdevice;
}
device->set_colorspace(sws_color_space, ctx->color_range);
return std::make_optional(session_t {
std::move(ctx),
std::move(frame),
std::move(device) });
}
void encode_run(
int &frame_nr, int &key_frame_nr, // Store progress of the frame number
safe::signal_t *shutdown_event, // Signal for shutdown event of the session
packet_queue_t packets,
idr_event_t idr_events,
img_event_t images,
config_t config,
int width, int height,
platf::hwdevice_t *hwdevice,
safe::signal_t &reinit_event,
const encoder_t &encoder,
void *channel_data) {
auto session = make_session(encoder, config, width, height, hwdevice);
if(!session) {
return;
}
auto delay = std::chrono::floor<std::chrono::nanoseconds>(1s) / config.framerate;
auto next_frame = std::chrono::steady_clock::now();
while(true) {
if(shutdown_event->peek() || reinit_event.peek() || !images->running()) {
break;
}
if(idr_events->peek()) {
session->frame->pict_type = AV_PICTURE_TYPE_I;
session->frame->key_frame = 1;
auto event = idr_events->pop();
if(!event) {
return;
}
auto end = event->second;
frame_nr = end;
key_frame_nr = end + config.framerate;
}
else if(frame_nr == key_frame_nr) {
session->frame->pict_type = AV_PICTURE_TYPE_I;
session->frame->key_frame = 1;
}
std::this_thread::sleep_until(next_frame);
next_frame += delay;
// When Moonlight request an IDR frame, send frames even if there is no new captured frame
if(frame_nr > (key_frame_nr + config.framerate) || images->peek()) {
if(auto img = images->pop(delay)) {
session->device->convert(*img);
encoder.img_to_frame(*session->device->img, session->frame);
}
else if(images->running()) {
continue;
}
else {
break;
}
}
if(encode(frame_nr++, session->ctx, session->frame, packets, channel_data)) {
BOOST_LOG(error) << "Could not encode video packet"sv;
return;
}
session->frame->pict_type = AV_PICTURE_TYPE_NONE;
session->frame->key_frame = 0;
}
}
std::optional<sync_session_t> make_synced_session(platf::display_t *disp, const encoder_t &encoder, platf::img_t &img, sync_session_ctx_t &ctx) {
sync_session_t encode_session;
encode_session.ctx = &ctx;
encode_session.next_frame = std::chrono::steady_clock::now();
encode_session.delay = std::chrono::nanoseconds { 1s } / ctx.config.framerate;
auto pix_fmt = ctx.config.dynamicRange == 0 ? map_pix_fmt(encoder.static_pix_fmt) : map_pix_fmt(encoder.dynamic_pix_fmt);
auto hwdevice = disp->make_hwdevice(ctx.config.width, ctx.config.height, pix_fmt);
if(!hwdevice) {
return std::nullopt;
}
auto session = make_session(encoder, ctx.config, img.width, img.height, hwdevice.get());
if(!session) {
return std::nullopt;
}
encode_session.img_tmp = &img;
encode_session.hwdevice = std::move(hwdevice);
encode_session.session = std::move(*session);
return std::move(encode_session);
}
encode_e encode_run_sync(std::vector<std::unique_ptr<sync_session_ctx_t>> &synced_session_ctxs, encode_session_ctx_queue_t &encode_session_ctx_queue) {
const auto &encoder = encoders.front();
std::shared_ptr<platf::display_t> disp;
while(encode_session_ctx_queue.running()) {
reset_display(disp, encoder.dev_type);
if(disp) {
break;
}
std::this_thread::sleep_for(200ms);
}
if(!disp) {
return encode_e::error;
}
auto img = disp->alloc_img();
auto img_tmp = img.get();
if(disp->dummy_img(img_tmp)) {
return encode_e::error;
}
// absolute mouse coordinates require that the dimensions of the screen are known
input::touch_port_event->raise(disp->offset_x, disp->offset_y, disp->width, disp->height);
std::vector<sync_session_t> synced_sessions;
for(auto &ctx : synced_session_ctxs) {
auto synced_session = make_synced_session(disp.get(), encoder, *img, *ctx);
if(!synced_session) {
return encode_e::error;
}
synced_sessions.emplace_back(std::move(*synced_session));
}
auto next_frame = std::chrono::steady_clock::now();
while(encode_session_ctx_queue.running()) {
while(encode_session_ctx_queue.peek()) {
auto encode_session_ctx = encode_session_ctx_queue.pop();
if(!encode_session_ctx) {
return encode_e::ok;
}
synced_session_ctxs.emplace_back(std::make_unique<sync_session_ctx_t>(std::move(*encode_session_ctx)));
auto encode_session = make_synced_session(disp.get(), encoder, *img, *synced_session_ctxs.back());
if(!encode_session) {
return encode_e::error;
}
synced_sessions.emplace_back(std::move(*encode_session));
next_frame = std::chrono::steady_clock::now();
}
auto delay = std::max(0ms, std::chrono::duration_cast<std::chrono::milliseconds>(next_frame - std::chrono::steady_clock::now()));
auto status = disp->snapshot(img.get(), delay, display_cursor);
switch(status) {
case platf::capture_e::reinit:
case platf::capture_e::error:
return status;
case platf::capture_e::timeout:
break;
case platf::capture_e::ok:
img_tmp = img.get();
break;
}
auto now = std::chrono::steady_clock::now();
next_frame = now + 1s;
KITTY_WHILE_LOOP(auto pos = std::begin(synced_sessions), pos != std::end(synced_sessions), {
auto ctx = pos->ctx;
if(ctx->shutdown_event->peek()) {
// Let waiting thread know it can delete shutdown_event
ctx->join_event->raise(true);
pos = synced_sessions.erase(pos);
synced_session_ctxs.erase(std::find_if(std::begin(synced_session_ctxs), std::end(synced_session_ctxs), [&ctx_p = ctx](auto &ctx) {
return ctx.get() == ctx_p;
}));
if(synced_sessions.empty()) {
return encode_e::ok;
}
continue;
}
if(ctx->idr_events->peek()) {
pos->session.frame->pict_type = AV_PICTURE_TYPE_I;
pos->session.frame->key_frame = 1;
auto event = ctx->idr_events->pop();
auto end = event->second;
ctx->frame_nr = end;
ctx->key_frame_nr = end + ctx->config.framerate;
}
else if(ctx->frame_nr == ctx->key_frame_nr) {
pos->session.frame->pict_type = AV_PICTURE_TYPE_I;
pos->session.frame->key_frame = 1;
}
if(img_tmp) {
pos->img_tmp = img_tmp;
}
auto timeout = now > pos->next_frame;
if(timeout) {
pos->next_frame += pos->delay;
}
next_frame = std::min(next_frame, pos->next_frame);
if(!timeout) {
++pos;
continue;
}
if(pos->img_tmp) {
if(pos->hwdevice->convert(*pos->img_tmp)) {
BOOST_LOG(error) << "Could not convert image"sv;
ctx->shutdown_event->raise(true);
continue;
}
pos->img_tmp = nullptr;
encoder.img_to_frame(*pos->hwdevice->img, pos->session.frame);
}
if(encode(ctx->frame_nr++, pos->session.ctx, pos->session.frame, ctx->packets, ctx->channel_data)) {
BOOST_LOG(error) << "Could not encode video packet"sv;
ctx->shutdown_event->raise(true);
continue;
}
pos->session.frame->pict_type = AV_PICTURE_TYPE_NONE;
pos->session.frame->key_frame = 0;
++pos;
})
img_tmp = nullptr;
}
return encode_e::ok;
}
void captureThreadSync() {
auto ref = capture_thread_sync.ref();
std::vector<std::unique_ptr<sync_session_ctx_t>> synced_session_ctxs;
auto &ctx = ref->encode_session_ctx_queue;
auto lg = util::fail_guard([&]() {
ctx.stop();
for(auto &ctx : synced_session_ctxs) {
ctx->shutdown_event->raise(true);
ctx->join_event->raise(true);
}
for(auto &ctx : ctx.unsafe()) {
ctx.shutdown_event->raise(true);
ctx.join_event->raise(true);
}
});
while(encode_run_sync(synced_session_ctxs, ctx) == encode_e::reinit)
;
}
void capture_async(
safe::signal_t *shutdown_event,
packet_queue_t &packets,
idr_event_t &idr_events,
config_t &config,
void *channel_data) {
auto images = std::make_shared<img_event_t::element_type>();
auto lg = util::fail_guard([&]() {
images->stop();
shutdown_event->raise(true);
});
auto ref = capture_thread_async.ref();
if(!ref) {
return;
}
auto delay = std::chrono::floor<std::chrono::nanoseconds>(1s) / config.framerate;
ref->capture_ctx_queue->raise(capture_ctx_t {
images, delay });
if(!ref->capture_ctx_queue->running()) {
return;
}
int frame_nr = 1;
int key_frame_nr = 1;
while(!shutdown_event->peek() && images->running()) {
// Wait for the main capture event when the display is being reinitialized
if(ref->reinit_event.peek()) {
std::this_thread::sleep_for(100ms);
continue;
}
// Wait for the display to be ready
std::shared_ptr<platf::display_t> display;
{
auto lg = ref->display_wp.lock();
if(ref->display_wp->expired()) {
continue;
}
display = ref->display_wp->lock();
}
auto pix_fmt = config.dynamicRange == 0 ? platf::pix_fmt_e::yuv420p : platf::pix_fmt_e::yuv420p10;
auto hwdevice = display->make_hwdevice(config.width, config.height, pix_fmt);
if(!hwdevice) {
return;
}
auto dummy_img = display->alloc_img();
if(display->dummy_img(dummy_img.get())) {
return;
}
images->raise(std::move(dummy_img));
// absolute mouse coordinates require that the dimensions of the screen are known
input::touch_port_event->raise(display->offset_x, display->offset_y, display->width, display->height);
encode_run(
frame_nr, key_frame_nr,
shutdown_event,
packets, idr_events, images,
config, display->width, display->height,
hwdevice.get(),
ref->reinit_event, *ref->encoder_p,
channel_data);
}
}
void capture(
safe::signal_t *shutdown_event,
packet_queue_t packets,
idr_event_t idr_events,
config_t config,
void *channel_data) {
idr_events->raise(std::make_pair(0, 1));
if(encoders.front().system_memory) {
capture_async(shutdown_event, packets, idr_events, config, channel_data);
}
else {
safe::signal_t join_event;
auto ref = capture_thread_sync.ref();
ref->encode_session_ctx_queue.raise(sync_session_ctx_t {
shutdown_event, &join_event, packets, idr_events, config, 1, 1, channel_data });
// Wait for join signal
join_event.view();
}
}
bool validate_config(std::shared_ptr<platf::display_t> &disp, const encoder_t &encoder, const config_t &config) {
reset_display(disp, encoder.dev_type);
if(!disp) {
return false;
}
auto pix_fmt = config.dynamicRange == 0 ? map_pix_fmt(encoder.static_pix_fmt) : map_pix_fmt(encoder.dynamic_pix_fmt);
auto hwdevice = disp->make_hwdevice(config.width, config.height, pix_fmt);
if(!hwdevice) {
return false;
}
auto session = make_session(encoder, config, disp->width, disp->height, hwdevice.get());
if(!session) {
return false;
}
auto img = disp->alloc_img();
if(disp->dummy_img(img.get())) {
return false;
}
if(session->device->convert(*img)) {
return false;
}
encoder.img_to_frame(*hwdevice->img, session->frame);
session->frame->pict_type = AV_PICTURE_TYPE_I;
auto packets = std::make_shared<packet_queue_t::element_type>(30);
if(encode(1, session->ctx, session->frame, packets, nullptr)) {
return false;
}
return true;
}
bool validate_encoder(encoder_t &encoder) {
std::shared_ptr<platf::display_t> disp;
BOOST_LOG(info) << "Trying encoder ["sv << encoder.name << ']';
auto fg = util::fail_guard([&]() {
BOOST_LOG(info) << "Encoder ["sv << encoder.name << "] failed"sv;
});
auto force_hevc = config::video.hevc_mode >= 2;
auto test_hevc = force_hevc || (config::video.hevc_mode == 0 && encoder.hevc_mode);
encoder.h264.capabilities.set();
encoder.hevc.capabilities.set();
// First, test encoder viability
config_t config_max_ref_frames { 1920, 1080, 60, 1000, 1, 1, 1, 0, 0 };
config_t config_autoselect { 1920, 1080, 60, 1000, 1, 0, 1, 0, 0 };
auto max_ref_frames_h264 = validate_config(disp, encoder, config_max_ref_frames);
auto autoselect_h264 = validate_config(disp, encoder, config_autoselect);
if(!max_ref_frames_h264 && !autoselect_h264) {
return false;
}
encoder.h264[encoder_t::REF_FRAMES_RESTRICT] = max_ref_frames_h264;
encoder.h264[encoder_t::REF_FRAMES_AUTOSELECT] = autoselect_h264;
encoder.h264[encoder_t::PASSED] = true;
if(test_hevc) {
config_max_ref_frames.videoFormat = 1;
config_autoselect.videoFormat = 1;
auto max_ref_frames_hevc = validate_config(disp, encoder, config_max_ref_frames);
auto autoselect_hevc = validate_config(disp, encoder, config_autoselect);
// If HEVC must be supported, but it is not supported
if(force_hevc && !max_ref_frames_hevc && !autoselect_hevc) {
return false;
}
encoder.hevc[encoder_t::REF_FRAMES_RESTRICT] = max_ref_frames_hevc;
encoder.hevc[encoder_t::REF_FRAMES_AUTOSELECT] = autoselect_hevc;
}
encoder.hevc[encoder_t::PASSED] = test_hevc;
std::vector<std::pair<encoder_t::flag_e, config_t>> configs {
{ encoder_t::DYNAMIC_RANGE, { 1920, 1080, 60, 1000, 1, 0, 3, 1, 1 } }
};
for(auto &[flag, config] : configs) {
auto h264 = config;
auto hevc = config;
h264.videoFormat = 0;
hevc.videoFormat = 1;
encoder.h264[flag] = validate_config(disp, encoder, h264);
if(test_hevc && encoder.hevc[encoder_t::PASSED]) {
encoder.hevc[flag] = validate_config(disp, encoder, hevc);
}
}
fg.disable();
return true;
}
int init() {
// video depends on input for input::touch_port_event
input::init();
BOOST_LOG(info) << "//////////////////////////////////////////////////////////////////"sv;
BOOST_LOG(info) << "// //"sv;
BOOST_LOG(info) << "// Testing for available encoders, this may generate errors. //"sv;
BOOST_LOG(info) << "// You can safely ignore those errors. //"sv;
BOOST_LOG(info) << "// //"sv;
BOOST_LOG(info) << "//////////////////////////////////////////////////////////////////"sv;
KITTY_WHILE_LOOP(auto pos = std::begin(encoders), pos != std::end(encoders), {
if(
(!config::video.encoder.empty() && pos->name != config::video.encoder) ||
!validate_encoder(*pos) ||
(config::video.hevc_mode == 3 && !pos->hevc[encoder_t::DYNAMIC_RANGE])) {
pos = encoders.erase(pos);
continue;
}
break;
})
if(encoders.empty()) {
if(config::video.encoder.empty()) {
BOOST_LOG(fatal) << "Couldn't find any encoder"sv;
}
else {
BOOST_LOG(fatal) << "Couldn't find any encoder matching ["sv << config::video.encoder << ']';
}
return -1;
}
BOOST_LOG(info);
BOOST_LOG(info) << "//////////////////////////////////////////////////////////////"sv;
BOOST_LOG(info) << "// //"sv;
BOOST_LOG(info) << "// Ignore any errors mentioned above, they are not relevant //"sv;
BOOST_LOG(info) << "// //"sv;
BOOST_LOG(info) << "//////////////////////////////////////////////////////////////"sv;
BOOST_LOG(info);
auto &encoder = encoders.front();
if(encoder.hevc[encoder_t::PASSED]) {
BOOST_LOG(info) << "Found encoder "sv << encoder.name << ": ["sv << encoder.h264.name << ", "sv << encoder.hevc.name << ']';
}
else {
BOOST_LOG(info) << "Found encoder "sv << encoder.name << ": ["sv << encoder.h264.name << ']';
}
if(config::video.hevc_mode == 0) {
config::video.hevc_mode = encoder.hevc[encoder_t::PASSED] ? (encoder.hevc[encoder_t::DYNAMIC_RANGE] ? 3 : 2) : 1;
}
return 0;
}
util::Either<buffer_t, int> make_hwdevice_ctx(AVHWDeviceType type, void *hwdevice) {
buffer_t ctx;
int err;
if(hwdevice) {
ctx.reset(av_hwdevice_ctx_alloc(type));
((AVHWDeviceContext *)ctx.get())->hwctx = hwdevice;
err = av_hwdevice_ctx_init(ctx.get());
}
else {
AVBufferRef *ref {};
err = av_hwdevice_ctx_create(&ref, type, nullptr, nullptr, 0);
ctx.reset(ref);
}
if(err < 0) {
return err;
}
return ctx;
}
int hwframe_ctx(ctx_t &ctx, buffer_t &hwdevice, AVPixelFormat format) {
buffer_t frame_ref { av_hwframe_ctx_alloc(hwdevice.get()) };
auto frame_ctx = (AVHWFramesContext *)frame_ref->data;
frame_ctx->format = ctx->pix_fmt;
frame_ctx->sw_format = format;
frame_ctx->height = ctx->height;
frame_ctx->width = ctx->width;
frame_ctx->initial_pool_size = 0;
if(auto err = av_hwframe_ctx_init(frame_ref.get()); err < 0) {
return err;
}
ctx->hw_frames_ctx = av_buffer_ref(frame_ref.get());
return 0;
}
void sw_img_to_frame(const platf::img_t &img, frame_t &frame) {}
#ifdef _WIN32
}
// Ugly, but need to declare for wio
namespace platf::dxgi {
void lock(void *hwdevice);
void unlock(void *hwdevice);
} // namespace platf::dxgi
void do_nothing(void *) {}
namespace video {
void dxgi_img_to_frame(const platf::img_t &img, frame_t &frame) {
if(img.data == frame->data[0]) {
return;
}
// Need to have something refcounted
if(!frame->buf[0]) {
frame->buf[0] = av_buffer_allocz(sizeof(AVD3D11FrameDescriptor));
}
auto desc = (AVD3D11FrameDescriptor *)frame->buf[0]->data;
desc->texture = (ID3D11Texture2D *)img.data;
desc->index = 0;
frame->data[0] = img.data;
frame->data[1] = 0;
frame->linesize[0] = img.row_pitch;
frame->height = img.height;
frame->width = img.width;
}
util::Either<buffer_t, int> dxgi_make_hwdevice_ctx(platf::hwdevice_t *hwdevice_ctx) {
buffer_t ctx_buf { av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_D3D11VA) };
auto ctx = (AVD3D11VADeviceContext *)((AVHWDeviceContext *)ctx_buf->data)->hwctx;
std::fill_n((std::uint8_t *)ctx, sizeof(AVD3D11VADeviceContext), 0);
auto device = (ID3D11Device *)hwdevice_ctx->data;
device->AddRef();
ctx->device = device;
ctx->lock_ctx = (void *)1;
ctx->lock = do_nothing;
ctx->unlock = do_nothing;
auto err = av_hwdevice_ctx_init(ctx_buf.get());
if(err) {
char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
BOOST_LOG(error) << "Failed to create FFMpeg hardware device context: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
return err;
}
return ctx_buf;
}
#endif
int start_capture_async(capture_thread_async_ctx_t &capture_thread_ctx) {
capture_thread_ctx.encoder_p = &encoders.front();
capture_thread_ctx.reinit_event.reset();
capture_thread_ctx.capture_ctx_queue = std::make_shared<safe::queue_t<capture_ctx_t>>(30);
capture_thread_ctx.capture_thread = std::thread {
captureThread,
capture_thread_ctx.capture_ctx_queue,
std::ref(capture_thread_ctx.display_wp),
std::ref(capture_thread_ctx.reinit_event),
std::ref(*capture_thread_ctx.encoder_p)
};
return 0;
}
void end_capture_async(capture_thread_async_ctx_t &capture_thread_ctx) {
capture_thread_ctx.capture_ctx_queue->stop();
capture_thread_ctx.capture_thread.join();
}
int start_capture_sync(capture_thread_sync_ctx_t &ctx) {
std::thread { &captureThreadSync }.detach();
return 0;
}
void end_capture_sync(capture_thread_sync_ctx_t &ctx) {}
platf::dev_type_e map_dev_type(AVHWDeviceType type) {
switch(type) {
case AV_HWDEVICE_TYPE_D3D11VA:
return platf::dev_type_e::dxgi;
case AV_PICTURE_TYPE_NONE:
return platf::dev_type_e::none;
default:
return platf::dev_type_e::unknown;
}
return platf::dev_type_e::unknown;
}
platf::pix_fmt_e map_pix_fmt(AVPixelFormat fmt) {
switch(fmt) {
case AV_PIX_FMT_YUV420P10:
return platf::pix_fmt_e::yuv420p10;
case AV_PIX_FMT_YUV420P:
return platf::pix_fmt_e::yuv420p;
case AV_PIX_FMT_NV12:
return platf::pix_fmt_e::nv12;
case AV_PIX_FMT_P010:
return platf::pix_fmt_e::p010;
default:
return platf::pix_fmt_e::unknown;
}
return platf::pix_fmt_e::unknown;
}
}
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