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obs-StreamFX/source/encoders/encoder-ffmpeg.cpp
Michael Fabian 'Xaymar' Dirks c84c301d49 obs/gs: Apply coding guidelines
2023-04-05 18:50:59 +02:00

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// FFMPEG Video Encoder Integration for OBS Studio
// Copyright (c) 2019 Michael Fabian Dirks <info@xaymar.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "encoder-ffmpeg.hpp"
#include "strings.hpp"
#include <sstream>
#include "codecs/hevc.hpp"
#include "ffmpeg/tools.hpp"
#include "handlers/debug_handler.hpp"
#include "obs/gs/gs-helper.hpp"
#include "plugin.hpp"
#ifdef ENABLE_ENCODER_FFMPEG_AMF
#include "handlers/amf_h264_handler.hpp"
#include "handlers/amf_hevc_handler.hpp"
#endif
#ifdef ENABLE_ENCODER_FFMPEG_NVENC
#include "handlers/nvenc_h264_handler.hpp"
#include "handlers/nvenc_hevc_handler.hpp"
#endif
#ifdef ENABLE_ENCODER_FFMPEG_PRORES
#include "handlers/prores_aw_handler.hpp"
#endif
extern "C" {
#pragma warning(push)
#pragma warning(disable : 4244)
#include <obs-avc.h>
#include <libavcodec/avcodec.h>
#include <libavutil/dict.h>
#include <libavutil/frame.h>
#include <libavutil/opt.h>
#include <libavutil/pixdesc.h>
#pragma warning(pop)
}
#ifdef WIN32
#include "ffmpeg/hwapi/d3d11.hpp"
#endif
// FFmpeg
#define ST_I18N_FFMPEG "FFmpegEncoder"
#define ST_I18N_FFMPEG_SUFFIX ST_I18N_FFMPEG ".Suffix"
#define ST_I18N_FFMPEG_CUSTOMSETTINGS ST_I18N_FFMPEG ".CustomSettings"
#define ST_KEY_FFMPEG_CUSTOMSETTINGS "FFmpeg.CustomSettings"
#define ST_I18N_FFMPEG_THREADS ST_I18N_FFMPEG ".Threads"
#define ST_KEY_FFMPEG_THREADS "FFmpeg.Threads"
#define ST_I18N_FFMPEG_COLORFORMAT ST_I18N_FFMPEG ".ColorFormat"
#define ST_KEY_FFMPEG_COLORFORMAT "FFmpeg.ColorFormat"
#define ST_I18N_FFMPEG_STANDARDCOMPLIANCE ST_I18N_FFMPEG ".StandardCompliance"
#define ST_KEY_FFMPEG_STANDARDCOMPLIANCE "FFmpeg.StandardCompliance"
#define ST_I18N_FFMPEG_GPU ST_I18N_FFMPEG ".GPU"
#define ST_KEY_FFMPEG_GPU "FFmpeg.GPU"
#define ST_I18N_KEYFRAMES ST_I18N_FFMPEG ".KeyFrames"
#define ST_I18N_KEYFRAMES_INTERVALTYPE ST_I18N_KEYFRAMES ".IntervalType"
#define ST_I18N_KEYFRAMES_INTERVALTYPE_(x) ST_I18N_KEYFRAMES "." x
#define ST_KEY_KEYFRAMES_INTERVALTYPE "KeyFrames.IntervalType"
#define ST_I18N_KEYFRAMES_INTERVAL ST_I18N_KEYFRAMES ".Interval"
#define ST_I18N_KEYFRAMES_INTERVAL_SECONDS ST_I18N_KEYFRAMES_INTERVAL ".Seconds"
#define ST_KEY_KEYFRAMES_INTERVAL_SECONDS "KeyFrames.Interval.Seconds"
#define ST_I18N_KEYFRAMES_INTERVAL_FRAMES ST_I18N_KEYFRAMES_INTERVAL ".Frames"
#define ST_KEY_KEYFRAMES_INTERVAL_FRAMES "KeyFrames.Interval.Frames"
using namespace streamfx::encoder::ffmpeg;
using namespace streamfx::encoder::codec;
enum class keyframe_type { SECONDS, FRAMES };
ffmpeg_instance::ffmpeg_instance(obs_data_t* settings, obs_encoder_t* self, bool is_hw)
: encoder_instance(settings, self, is_hw),
_factory(reinterpret_cast<ffmpeg_factory*>(obs_encoder_get_type_data(self))),
_codec(_factory->get_avcodec()), _context(nullptr), _handler(ffmpeg_manager::get()->get_handler(_codec->name)),
_scaler(), _packet(),
_hwapi(), _hwinst(),
_lag_in_frames(0), _sent_frames(0), _have_first_frame(false), _extra_data(), _sei_data(),
_free_frames(), _used_frames(), _free_frames_last_used()
{
// Initialize GPU Stuff
if (is_hw) {
// Abort if user specified manual override.
if ((static_cast<AVPixelFormat>(obs_data_get_int(settings, ST_KEY_FFMPEG_COLORFORMAT)) != AV_PIX_FMT_NONE)
|| (obs_data_get_int(settings, ST_KEY_FFMPEG_GPU) != -1) || (obs_encoder_scaling_enabled(_self))
|| (video_output_get_info(obs_encoder_video(_self))->format != VIDEO_FORMAT_NV12)) {
throw std::runtime_error(
"Selected settings prevent the use of hardware encoding, falling back to software.");
}
#ifdef WIN32
auto gctx = streamfx::obs::gs::context();
if (gs_get_device_type() == GS_DEVICE_DIRECT3D_11) {
_hwapi = std::make_shared<::streamfx::ffmpeg::hwapi::d3d11>();
}
#endif
if (!_hwapi) {
throw std::runtime_error("Failed to create acceleration context.");
}
_hwinst = _hwapi->create_from_obs();
}
// Initialize context.
_context = avcodec_alloc_context3(_codec);
if (!_context) {
DLOG_ERROR("Failed to create context for encoder '%s'.", _codec->name);
throw std::runtime_error("Failed to create encoder context.");
}
// Create 8MB of precached Packet data for use later on.
av_init_packet(&_packet);
av_new_packet(&_packet, 8 * 1024 * 1024); // 8 MB precached Packet size.
// Initialize
if (is_hw) {
initialize_hw(settings);
} else {
initialize_sw(settings);
}
// Update settings
update(settings);
// Initialize Encoder
auto gctx = streamfx::obs::gs::context();
int res = avcodec_open2(_context, _codec, NULL);
if (res < 0) {
throw std::runtime_error(::streamfx::ffmpeg::tools::get_error_description(res));
}
}
ffmpeg_instance::~ffmpeg_instance()
{
auto gctx = streamfx::obs::gs::context();
if (_context) {
// Flush encoders that require it.
if ((_codec->capabilities & AV_CODEC_CAP_DELAY) != 0) {
avcodec_send_frame(_context, nullptr);
while (avcodec_receive_packet(_context, &_packet) >= 0) {
avcodec_send_frame(_context, nullptr);
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
// Close and free context.
avcodec_close(_context);
avcodec_free_context(&_context);
}
av_packet_unref(&_packet);
_scaler.finalize();
}
void ffmpeg_instance::get_properties(obs_properties_t* props)
{
if (_handler)
_handler->get_properties(props, _codec, _context, _handler->is_hardware_encoder(_factory));
obs_property_set_enabled(obs_properties_get(props, ST_KEY_KEYFRAMES_INTERVALTYPE), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_KEYFRAMES_INTERVAL_SECONDS), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_KEYFRAMES_INTERVAL_FRAMES), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_FFMPEG_COLORFORMAT), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_FFMPEG_THREADS), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_FFMPEG_STANDARDCOMPLIANCE), false);
obs_property_set_enabled(obs_properties_get(props, ST_KEY_FFMPEG_GPU), false);
}
void ffmpeg_instance::migrate(obs_data_t* settings, uint64_t version)
{
if (_handler)
_handler->migrate(settings, version, _codec, _context);
}
bool ffmpeg_instance::update(obs_data_t* settings)
{
// FFmpeg Options
_context->debug = 0;
_context->strict_std_compliance = static_cast<int>(obs_data_get_int(settings, ST_KEY_FFMPEG_STANDARDCOMPLIANCE));
/// Threading
if (!_hwinst) {
_context->thread_type = 0;
if (_codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) {
_context->thread_type |= FF_THREAD_FRAME;
}
if (_codec->capabilities & AV_CODEC_CAP_SLICE_THREADS) {
_context->thread_type |= FF_THREAD_SLICE;
}
if (_context->thread_type != 0) {
int64_t threads = obs_data_get_int(settings, ST_I18N_FFMPEG_THREADS);
if (threads > 0) {
_context->thread_count = static_cast<int>(threads);
} else {
_context->thread_count = static_cast<int>(std::thread::hardware_concurrency());
}
} else {
_context->thread_count = 1;
}
// Frame Delay (Lag In Frames)
_context->delay = _context->thread_count;
} else {
_context->delay = 0;
}
// Apply GPU Selection
if (!_hwinst && ::streamfx::ffmpeg::tools::can_hardware_encode(_codec)) {
av_opt_set_int(_context, "gpu", (int)obs_data_get_int(settings, ST_KEY_FFMPEG_GPU), AV_OPT_SEARCH_CHILDREN);
}
// Keyframes
if (_handler && _handler->has_keyframe_support(_factory)) {
// Key-Frame Options
obs_video_info ovi;
if (!obs_get_video_info(&ovi)) {
throw std::runtime_error("obs_get_video_info failed, restart OBS Studio to fix it (hopefully).");
}
int64_t kf_type = obs_data_get_int(settings, ST_KEY_KEYFRAMES_INTERVALTYPE);
bool is_seconds = (kf_type == 0);
if (is_seconds) {
_context->gop_size = static_cast<int>(obs_data_get_double(settings, ST_KEY_KEYFRAMES_INTERVAL_SECONDS)
* (ovi.fps_num / ovi.fps_den));
} else {
_context->gop_size = static_cast<int>(obs_data_get_int(settings, ST_KEY_KEYFRAMES_INTERVAL_FRAMES));
}
_context->keyint_min = _context->gop_size;
}
// Handler Options
if (_handler)
_handler->update(settings, _codec, _context);
{ // FFmpeg Custom Options
const char* opts = obs_data_get_string(settings, ST_KEY_FFMPEG_CUSTOMSETTINGS);
std::size_t opts_len = strnlen(opts, 65535);
parse_ffmpeg_commandline(std::string{opts, opts + opts_len});
}
// Handler Overrides
if (_handler)
_handler->override_update(this, settings);
// Handler Logging
if (_handler) {
DLOG_INFO("[%s] Initializing...", _codec->name);
DLOG_INFO("[%s] FFmpeg:", _codec->name);
DLOG_INFO("[%s] Custom Settings: %s", _codec->name,
obs_data_get_string(settings, ST_KEY_FFMPEG_CUSTOMSETTINGS));
DLOG_INFO("[%s] Standard Compliance: %s", _codec->name,
::streamfx::ffmpeg::tools::get_std_compliance_name(_context->strict_std_compliance));
DLOG_INFO("[%s] Threading: %s (with %i threads)", _codec->name,
::streamfx::ffmpeg::tools::get_thread_type_name(_context->thread_type), _context->thread_count);
DLOG_INFO("[%s] Video:", _codec->name);
if (_hwinst) {
DLOG_INFO("[%s] Texture: %" PRId32 "x%" PRId32 " %s %s %s", _codec->name, _context->width,
_context->height, ::streamfx::ffmpeg::tools::get_pixel_format_name(_context->sw_pix_fmt),
::streamfx::ffmpeg::tools::get_color_space_name(_context->colorspace),
av_color_range_name(_context->color_range));
} else {
DLOG_INFO("[%s] Input: %" PRId32 "x%" PRId32 " %s %s %s", _codec->name, _scaler.get_source_width(),
_scaler.get_source_height(),
::streamfx::ffmpeg::tools::get_pixel_format_name(_scaler.get_source_format()),
::streamfx::ffmpeg::tools::get_color_space_name(_scaler.get_source_colorspace()),
_scaler.is_source_full_range() ? "Full" : "Partial");
DLOG_INFO("[%s] Output: %" PRId32 "x%" PRId32 " %s %s %s", _codec->name, _scaler.get_target_width(),
_scaler.get_target_height(),
::streamfx::ffmpeg::tools::get_pixel_format_name(_scaler.get_target_format()),
::streamfx::ffmpeg::tools::get_color_space_name(_scaler.get_target_colorspace()),
_scaler.is_target_full_range() ? "Full" : "Partial");
if (!_hwinst)
DLOG_INFO("[%s] On GPU Index: %lli", _codec->name, obs_data_get_int(settings, ST_KEY_FFMPEG_GPU));
}
DLOG_INFO("[%s] Framerate: %" PRId32 "/%" PRId32 " (%f FPS)", _codec->name, _context->time_base.den,
_context->time_base.num,
static_cast<double_t>(_context->time_base.den) / static_cast<double_t>(_context->time_base.num));
DLOG_INFO("[%s] Keyframes: ", _codec->name);
if (_context->keyint_min != _context->gop_size) {
DLOG_INFO("[%s] Minimum: %i frames", _codec->name, _context->keyint_min);
DLOG_INFO("[%s] Maximum: %i frames", _codec->name, _context->gop_size);
} else {
DLOG_INFO("[%s] Distance: %i frames", _codec->name, _context->gop_size);
}
_handler->log_options(settings, _codec, _context);
}
return true;
}
static inline void copy_data(encoder_frame* frame, AVFrame* vframe)
{
int h_chroma_shift, v_chroma_shift;
av_pix_fmt_get_chroma_sub_sample(static_cast<AVPixelFormat>(vframe->format), &h_chroma_shift, &v_chroma_shift);
for (std::size_t idx = 0; idx < MAX_AV_PLANES; idx++) {
if (!frame->data[idx] || !vframe->data[idx])
continue;
std::size_t plane_height = static_cast<size_t>(vframe->height) >> (idx ? v_chroma_shift : 0);
if (static_cast<uint32_t>(vframe->linesize[idx]) == frame->linesize[idx]) {
std::memcpy(vframe->data[idx], frame->data[idx], frame->linesize[idx] * plane_height);
} else {
std::size_t ls_in = static_cast<size_t>(frame->linesize[idx]);
std::size_t ls_out = static_cast<size_t>(vframe->linesize[idx]);
std::size_t bytes = ls_in < ls_out ? ls_in : ls_out;
uint8_t* to = vframe->data[idx];
uint8_t* from = frame->data[idx];
for (std::size_t y = 0; y < plane_height; y++) {
std::memcpy(to, from, bytes);
to += ls_out;
from += ls_in;
}
}
}
}
bool ffmpeg_instance::encode_audio(struct encoder_frame* frame, struct encoder_packet* packet, bool* received_packet)
{
throw std::logic_error("The method or operation is not implemented.");
}
bool ffmpeg_instance::encode_video(struct encoder_frame* frame, struct encoder_packet* packet, bool* received_packet)
{
std::shared_ptr<AVFrame> vframe = pop_free_frame(); // Retrieve an empty frame.
// Convert frame.
{
vframe->height = _context->height;
vframe->format = _context->pix_fmt;
vframe->color_range = _context->color_range;
vframe->colorspace = _context->colorspace;
vframe->color_primaries = _context->color_primaries;
vframe->color_trc = _context->color_trc;
vframe->pts = frame->pts;
if ((_scaler.is_source_full_range() == _scaler.is_target_full_range())
&& (_scaler.get_source_colorspace() == _scaler.get_target_colorspace())
&& (_scaler.get_source_format() == _scaler.get_target_format())) {
copy_data(frame, vframe.get());
} else {
int res = _scaler.convert(reinterpret_cast<uint8_t**>(frame->data), reinterpret_cast<int*>(frame->linesize),
0, _context->height, vframe->data, vframe->linesize);
if (res <= 0) {
DLOG_ERROR("Failed to convert frame: %s (%" PRId32 ").",
::streamfx::ffmpeg::tools::get_error_description(res), res);
return false;
}
}
}
if (!encode_avframe(vframe, packet, received_packet))
return false;
return true;
}
bool ffmpeg_instance::encode_video(uint32_t handle, int64_t pts, uint64_t lock_key, uint64_t* next_key,
struct encoder_packet* packet, bool* received_packet)
{
#ifdef D_PLATFORM_WINDOWS
if (handle == GS_INVALID_HANDLE) {
DLOG_ERROR("Received invalid handle.");
*next_key = lock_key;
return false;
}
std::shared_ptr<AVFrame> vframe = pop_free_frame();
_hwinst->copy_from_obs(_context->hw_frames_ctx, handle, lock_key, next_key, vframe);
vframe->color_range = _context->color_range;
vframe->colorspace = _context->colorspace;
vframe->color_primaries = _context->color_primaries;
vframe->color_trc = _context->color_trc;
vframe->pts = pts;
if (!encode_avframe(vframe, packet, received_packet))
return false;
*next_key = lock_key;
return true;
#else
return false;
#endif
}
void ffmpeg_instance::initialize_sw(obs_data_t* settings)
{
if (_codec->type == AVMEDIA_TYPE_VIDEO) {
// Initialize Video Encoding
auto voi = video_output_get_info(obs_encoder_video(_self));
// Find a suitable Pixel Format.
AVPixelFormat _pixfmt_source = ::streamfx::ffmpeg::tools::obs_videoformat_to_avpixelformat(voi->format);
AVPixelFormat _pixfmt_target =
static_cast<AVPixelFormat>(obs_data_get_int(settings, ST_KEY_FFMPEG_COLORFORMAT));
if (_pixfmt_target == AV_PIX_FMT_NONE) {
// Find the best conversion format.
if (_codec->pix_fmts) {
_pixfmt_target = ::streamfx::ffmpeg::tools::get_least_lossy_format(_codec->pix_fmts, _pixfmt_source);
} else { // If there are no supported formats, just pass in the current one.
_pixfmt_target = _pixfmt_source;
}
if (_handler) // Allow Handler to override the automatic color format for sanity reasons.
_handler->override_colorformat(_pixfmt_target, settings, _codec, _context);
} else {
// Use user override, guaranteed to be supported.
bool is_format_supported = false;
for (auto ptr = _codec->pix_fmts; *ptr != AV_PIX_FMT_NONE; ptr++) {
if (*ptr == _pixfmt_target) {
is_format_supported = true;
}
}
if (!is_format_supported) {
std::stringstream sstr;
sstr << "Color Format '" << ::streamfx::ffmpeg::tools::get_pixel_format_name(_pixfmt_target)
<< "' is not supported by the encoder.";
throw std::runtime_error(sstr.str().c_str());
}
}
// Setup from OBS information.
::streamfx::ffmpeg::tools::context_setup_from_obs(voi, _context);
// Override with other information.
_context->width = static_cast<int>(obs_encoder_get_width(_self));
_context->height = static_cast<int>(obs_encoder_get_height(_self));
_context->pix_fmt = _pixfmt_target;
// Prevent pixelation by sampling "center" instead of corners. This creates
// a smoother look, which may not be H.264/AVC standard compliant, however it
// provides better support for scaling algorithms, such as Bicubic.
_context->chroma_sample_location = AVCHROMA_LOC_CENTER;
_scaler.set_source_size(static_cast<uint32_t>(_context->width), static_cast<uint32_t>(_context->height));
_scaler.set_source_color(_context->color_range == AVCOL_RANGE_JPEG, _context->colorspace);
_scaler.set_source_format(_pixfmt_source);
_scaler.set_target_size(static_cast<uint32_t>(_context->width), static_cast<uint32_t>(_context->height));
_scaler.set_target_color(_context->color_range == AVCOL_RANGE_JPEG, _context->colorspace);
_scaler.set_target_format(_pixfmt_target);
// Create Scaler
if (!_scaler.initialize(SWS_POINT)) {
std::stringstream sstr;
sstr << "Initializing scaler failed for conversion from '"
<< ::streamfx::ffmpeg::tools::get_pixel_format_name(_scaler.get_source_format()) << "' to '"
<< ::streamfx::ffmpeg::tools::get_pixel_format_name(_scaler.get_target_format())
<< "' with color space '"
<< ::streamfx::ffmpeg::tools::get_color_space_name(_scaler.get_source_colorspace()) << "' and "
<< (_scaler.is_source_full_range() ? "full" : "partial") << " range.";
throw std::runtime_error(sstr.str());
}
}
}
void ffmpeg_instance::initialize_hw(obs_data_t*)
{
#ifndef D_PLATFORM_WINDOWS
throw std::runtime_error("OBS Studio currently does not support zero copy encoding for this platform.");
#else
// Initialize Video Encoding
const video_output_info* voi = video_output_get_info(obs_encoder_video(_self));
// Apply pixel format settings.
::streamfx::ffmpeg::tools::context_setup_from_obs(voi, _context);
_context->sw_pix_fmt = _context->pix_fmt;
_context->pix_fmt = AV_PIX_FMT_D3D11;
// Try to create a hardware context.
_context->hw_device_ctx = _hwinst->create_device_context();
_context->hw_frames_ctx = av_hwframe_ctx_alloc(_context->hw_device_ctx);
if (!_context->hw_frames_ctx) {
throw std::runtime_error("Creating hardware context failed.");
}
// Initialize Hardware Context
AVHWFramesContext* ctx = reinterpret_cast<AVHWFramesContext*>(_context->hw_frames_ctx->data);
ctx->width = _context->width;
ctx->height = _context->height;
ctx->format = _context->pix_fmt;
ctx->sw_format = _context->sw_pix_fmt;
if (int32_t res = av_hwframe_ctx_init(_context->hw_frames_ctx); res < 0) {
std::array<char, 2048> buffer;
size_t len = static_cast<size_t>(snprintf(buffer.data(), buffer.size(),
"Initializing hardware context failed with error: %s (%" PRIu32 ")",
::streamfx::ffmpeg::tools::get_error_description(res), res));
throw std::runtime_error(std::string(buffer.data(), buffer.data() + len));
}
#endif
}
void ffmpeg_instance::push_free_frame(std::shared_ptr<AVFrame> frame)
{
auto now = std::chrono::high_resolution_clock::now();
if (_free_frames.size() > 0) {
if ((now - _free_frames_last_used) < std::chrono::seconds(1)) {
_free_frames.push(frame);
}
} else {
_free_frames.push(frame);
_free_frames_last_used = std::chrono::high_resolution_clock::now();
}
}
std::shared_ptr<AVFrame> ffmpeg_instance::pop_free_frame()
{
std::shared_ptr<AVFrame> frame;
if (_free_frames.size() > 0) {
// Re-use existing frames first.
frame = _free_frames.top();
_free_frames.pop();
} else {
if (_hwinst) {
frame = _hwinst->allocate_frame(_context->hw_frames_ctx);
} else {
frame = std::shared_ptr<AVFrame>(av_frame_alloc(), [](AVFrame* frame) {
av_frame_unref(frame);
av_frame_free(&frame);
});
frame->width = _context->width;
frame->height = _context->height;
frame->format = _context->pix_fmt;
int res = av_frame_get_buffer(frame.get(), 32);
if (res < 0) {
throw std::runtime_error(::streamfx::ffmpeg::tools::get_error_description(res));
}
}
}
return frame;
}
void ffmpeg_instance::push_used_frame(std::shared_ptr<AVFrame> frame)
{
_used_frames.push(frame);
}
std::shared_ptr<AVFrame> ffmpeg_instance::pop_used_frame()
{
auto frame = _used_frames.front();
_used_frames.pop();
return frame;
}
bool ffmpeg_instance::get_extra_data(uint8_t** data, size_t* size)
{
if (_extra_data.size() == 0)
return false;
*data = _extra_data.data();
*size = _extra_data.size();
return true;
}
bool ffmpeg_instance::get_sei_data(uint8_t** data, size_t* size)
{
if (_sei_data.size() == 0)
return false;
*data = _sei_data.data();
*size = _sei_data.size();
return true;
}
void ffmpeg_instance::get_video_info(struct video_scale_info* info)
{
if (!is_hardware_encode()) {
// Override input with supported format if software encode.
info->format = ::streamfx::ffmpeg::tools::avpixelformat_to_obs_videoformat(_scaler.get_source_format());
}
}
int ffmpeg_instance::receive_packet(bool* received_packet, struct encoder_packet* packet)
{
int res = 0;
av_packet_unref(&_packet);
{
auto gctx = streamfx::obs::gs::context();
res = avcodec_receive_packet(_context, &_packet);
}
if (res != 0) {
return res;
}
if (!_have_first_frame) {
if (_codec->id == AV_CODEC_ID_H264) {
uint8_t* tmp_packet;
uint8_t* tmp_header;
uint8_t* tmp_sei;
std::size_t sz_packet, sz_header, sz_sei;
obs_extract_avc_headers(_packet.data, static_cast<size_t>(_packet.size), &tmp_packet, &sz_packet,
&tmp_header, &sz_header, &tmp_sei, &sz_sei);
if (sz_header) {
_extra_data.resize(sz_header);
std::memcpy(_extra_data.data(), tmp_header, sz_header);
}
if (sz_sei) {
_sei_data.resize(sz_sei);
std::memcpy(_sei_data.data(), tmp_sei, sz_sei);
}
// Not required, we only need the Extra Data and SEI Data anyway.
//std::memcpy(_current_packet.data, tmp_packet, sz_packet);
//_current_packet.size = static_cast<int>(sz_packet);
bfree(tmp_packet);
bfree(tmp_header);
bfree(tmp_sei);
} else if (_codec->id == AV_CODEC_ID_HEVC) {
hevc::extract_header_sei(_packet.data, static_cast<size_t>(_packet.size), _extra_data, _sei_data);
} else if (_context->extradata != nullptr) {
_extra_data.resize(static_cast<size_t>(_context->extradata_size));
std::memcpy(_extra_data.data(), _context->extradata, static_cast<size_t>(_context->extradata_size));
}
_have_first_frame = true;
}
// Allow Handler Post-Processing
if (_handler)
_handler->process_avpacket(_packet, _codec, _context);
packet->type = OBS_ENCODER_VIDEO;
packet->pts = _packet.pts;
packet->dts = _packet.dts;
packet->data = _packet.data;
packet->size = static_cast<size_t>(_packet.size);
packet->keyframe = !!(_packet.flags & AV_PKT_FLAG_KEY);
packet->drop_priority = packet->keyframe ? 0 : 1;
*received_packet = true;
push_free_frame(pop_used_frame());
return res;
}
int ffmpeg_instance::send_frame(std::shared_ptr<AVFrame> const frame)
{
int res = 0;
{
auto gctx = streamfx::obs::gs::context();
res = avcodec_send_frame(_context, frame.get());
}
if (res == 0) {
push_used_frame(frame);
}
return res;
}
bool ffmpeg_instance::encode_avframe(std::shared_ptr<AVFrame> frame, encoder_packet* packet, bool* received_packet)
{
bool sent_frame = false;
bool recv_packet = false;
bool should_lag = (_sent_frames >= _lag_in_frames);
auto loop_begin = std::chrono::high_resolution_clock::now();
auto loop_end = loop_begin + std::chrono::milliseconds(50);
while ((!sent_frame || (should_lag && !recv_packet)) && !(std::chrono::high_resolution_clock::now() > loop_end)) {
bool eagain_is_stupid = false;
if (!sent_frame) {
int res = send_frame(frame);
switch (res) {
case 0:
sent_frame = true;
frame = nullptr;
break;
case AVERROR(EAGAIN):
// This means we should call receive_packet again, but what do we do with that data?
// Why can't we queue on both? Do I really have to implement threading for this stuff?
if (*received_packet == true) {
DLOG_WARNING("Skipped frame due to EAGAIN when a packet was already returned.");
sent_frame = true;
}
eagain_is_stupid = true;
break;
case AVERROR(EOF):
DLOG_ERROR("Skipped frame due to end of stream.");
sent_frame = true;
break;
default:
DLOG_ERROR("Failed to encode frame: %s (%" PRId32 ").",
::streamfx::ffmpeg::tools::get_error_description(res), res);
return false;
}
}
if (!recv_packet) {
int res = receive_packet(received_packet, packet);
switch (res) {
case 0:
recv_packet = true;
break;
case AVERROR(EOF):
DLOG_ERROR("Received end of file.");
recv_packet = true;
break;
case AVERROR(EAGAIN):
if (sent_frame) {
recv_packet = true;
}
if (eagain_is_stupid) {
DLOG_ERROR("Both send and recieve returned EAGAIN, encoder is broken.");
return false;
}
break;
default:
DLOG_ERROR("Failed to receive packet: %s (%" PRId32 ").",
::streamfx::ffmpeg::tools::get_error_description(res), res);
return false;
}
}
if (!sent_frame || !recv_packet) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
if (!sent_frame)
push_free_frame(frame);
return true;
}
bool ffmpeg_instance::is_hardware_encode()
{
return _hwinst != nullptr;
}
const AVCodec* ffmpeg_instance::get_avcodec()
{
return _codec;
}
const AVCodecContext* ffmpeg_instance::get_avcodeccontext()
{
return _context;
}
void ffmpeg_instance::parse_ffmpeg_commandline(std::string text)
{
// Steps to properly parse a command line:
// 1. Split by space and package by quotes.
// 2. Parse each resulting option individually.
// First, we split by space and of course respect quotes while doing so.
// That means that "-foo= bar" is stored as std::string("-foo= bar"),
// and things like -foo="bar" is stored as std::string("-foo=\"bar\"").
// However "-foo"=bar" -foo2=bar" is stored as std::string("-foo=bar -foo2=bar")
// because the quote was not escaped.
std::list<std::string> opts;
std::stringstream opt_stream{std::ios_base::in | std::ios_base::out | std::ios_base::binary};
std::stack<char> quote_stack;
for (std::size_t p = 0; p <= text.size(); p++) {
char here = p < text.size() ? text.at(p) : 0;
if (here == '\\') {
std::size_t p2 = p + 1;
if (p2 < text.size()) {
char here2 = text.at(p2);
if (isdigit(here2)) { // Octal
// Not supported yet.
p++;
} else if (here2 == 'x') { // Hexadecimal
// Not supported yet.
p += 3;
} else if (here2 == 'u') { // 4 or 8 wide Unicode.
// Not supported yet.
} else if (here2 == 'a') {
opt_stream << '\a';
p++;
} else if (here2 == 'b') {
opt_stream << '\b';
p++;
} else if (here2 == 'f') {
opt_stream << '\f';
p++;
} else if (here2 == 'n') {
opt_stream << '\n';
p++;
} else if (here2 == 'r') {
opt_stream << '\r';
p++;
} else if (here2 == 't') {
opt_stream << '\t';
p++;
} else if (here2 == 'v') {
opt_stream << '\v';
p++;
} else if (here2 == '\\') {
opt_stream << '\\';
p++;
} else if (here2 == '\'') {
opt_stream << '\'';
p++;
} else if (here2 == '"') {
opt_stream << '"';
p++;
} else if (here2 == '?') {
opt_stream << '\?';
p++;
}
}
} else if ((here == '\'') || (here == '"')) {
if (quote_stack.size() > 1) {
opt_stream << here;
}
if (quote_stack.size() == 0) {
quote_stack.push(here);
} else if (quote_stack.top() == here) {
quote_stack.pop();
} else {
quote_stack.push(here);
}
} else if ((here == 0) || ((here == ' ') && (quote_stack.size() == 0))) {
std::string ropt = opt_stream.str();
if (ropt.size() > 0) {
opts.push_back(ropt);
opt_stream.str(std::string());
opt_stream.clear();
}
} else {
opt_stream << here;
}
}
// Now that we have a list of parameters as neatly grouped strings, and
// have also dealt with escaping for the most part. We want to parse
// an FFmpeg commandline option set here, so the first character in
// the string must be a '-'.
for (std::string& opt : opts) {
// Skip empty options.
if (opt.size() == 0)
continue;
// Skip options that don't start with a '-'.
if (opt.at(0) != '-') {
DLOG_WARNING("Option '%s' is malformed, must start with a '-'.", opt.c_str());
continue;
}
// Skip options that don't contain a '='.
const char* cstr = opt.c_str();
const char* eq_at = strchr(cstr, '=');
if (eq_at == nullptr) {
DLOG_WARNING("Option '%s' is malformed, must contain a '='.", opt.c_str());
continue;
}
try {
std::string key = opt.substr(1, static_cast<size_t>((eq_at - cstr) - 1));
std::string value = opt.substr(static_cast<size_t>((eq_at - cstr) + 1));
int res = av_opt_set(_context, key.c_str(), value.c_str(), AV_OPT_SEARCH_CHILDREN);
if (res < 0) {
DLOG_WARNING("Option '%s' (key: '%s', value: '%s') encountered error: %s", opt.c_str(), key.c_str(),
value.c_str(), ::streamfx::ffmpeg::tools::get_error_description(res));
}
} catch (const std::exception& ex) {
DLOG_ERROR("Option '%s' encountered exception: %s", opt.c_str(), ex.what());
}
}
}
ffmpeg_factory::ffmpeg_factory(const AVCodec* codec) : _avcodec(codec)
{
// Generate default identifier.
{
std::stringstream str;
str << S_PREFIX << _avcodec->name;
_id = str.str();
}
{ // Generate default name.
std::stringstream str;
if (_avcodec->long_name) {
str << _avcodec->long_name;
str << " (" << _avcodec->name << ")";
} else {
str << _avcodec->name;
}
str << D_TRANSLATE(ST_I18N_FFMPEG_SUFFIX);
_name = str.str();
}
// Try and find a codec name that libOBS understands.
if (auto* desc = avcodec_descriptor_get(_avcodec->id); desc) {
_codec = desc->name;
} else {
// If FFmpeg doesn't know better, fall back to the name.
_codec = _avcodec->name;
}
// Find any available handlers for this codec.
if (_handler = ffmpeg_manager::get()->get_handler(_avcodec->name); _handler) {
// Override any found info with the one specified by the handler.
_handler->adjust_info(this, _avcodec, _id, _name, _codec);
// Add texture capability for hardware encoders.
if (_handler->is_hardware_encoder(this)) {
_info.caps |= OBS_ENCODER_CAP_PASS_TEXTURE;
}
} else {
// If there are no handlers, default to mark it deprecated.
_info.caps |= OBS_ENCODER_CAP_DEPRECATED;
}
{ // Build Info structure.
_info.id = _id.c_str();
_info.codec = _codec.c_str();
if (_avcodec->type == AVMediaType::AVMEDIA_TYPE_VIDEO) {
_info.type = obs_encoder_type::OBS_ENCODER_VIDEO;
} else if (_avcodec->type == AVMediaType::AVMEDIA_TYPE_AUDIO) {
_info.type = obs_encoder_type::OBS_ENCODER_AUDIO;
}
}
// Register encoder and proxies.
finish_setup();
const std::string proxies[] = {
std::string("streamfx--") + _avcodec->name,
std::string("StreamFX-") + _avcodec->name,
std::string("obs-ffmpeg-encoder_") + _avcodec->name,
};
for (auto proxy_id : proxies) {
register_proxy(proxy_id);
if (_info.caps & OBS_ENCODER_CAP_PASS_TEXTURE) {
std::string proxy_fallback_id = proxy_id + "_sw";
register_proxy(proxy_fallback_id);
}
}
}
ffmpeg_factory::~ffmpeg_factory() {}
const char* ffmpeg_factory::get_name()
{
return _name.c_str();
}
void ffmpeg_factory::get_defaults2(obs_data_t* settings)
{
if (_handler)
_handler->get_defaults(settings, _avcodec, nullptr, _handler->is_hardware_encoder(this));
if ((_avcodec->capabilities & AV_CODEC_CAP_INTRA_ONLY) == 0) {
obs_data_set_default_int(settings, ST_KEY_KEYFRAMES_INTERVALTYPE, 0);
obs_data_set_default_double(settings, ST_KEY_KEYFRAMES_INTERVAL_SECONDS, 2.0);
obs_data_set_default_int(settings, ST_KEY_KEYFRAMES_INTERVAL_FRAMES, 300);
}
{ // Integrated Options
// FFmpeg
obs_data_set_default_string(settings, ST_KEY_FFMPEG_CUSTOMSETTINGS, "");
obs_data_set_default_int(settings, ST_KEY_FFMPEG_COLORFORMAT, static_cast<int64_t>(AV_PIX_FMT_NONE));
obs_data_set_default_int(settings, ST_KEY_FFMPEG_THREADS, 0);
obs_data_set_default_int(settings, ST_KEY_FFMPEG_GPU, -1);
obs_data_set_default_int(settings, ST_KEY_FFMPEG_STANDARDCOMPLIANCE, FF_COMPLIANCE_STRICT);
}
}
static bool modified_keyframes(obs_properties_t* props, obs_property_t*, obs_data_t* settings) noexcept
try {
bool is_seconds = obs_data_get_int(settings, ST_KEY_KEYFRAMES_INTERVALTYPE) == 0;
obs_property_set_visible(obs_properties_get(props, ST_KEY_KEYFRAMES_INTERVAL_FRAMES), !is_seconds);
obs_property_set_visible(obs_properties_get(props, ST_KEY_KEYFRAMES_INTERVAL_SECONDS), is_seconds);
return true;
} catch (const std::exception& ex) {
DLOG_ERROR("Unexpected exception in function '%s': %s.", __FUNCTION_NAME__, ex.what());
return false;
} catch (...) {
DLOG_ERROR("Unexpected exception in function '%s'.", __FUNCTION_NAME__);
return false;
}
obs_properties_t* ffmpeg_factory::get_properties2(instance_t* data)
{
obs_properties_t* props = obs_properties_create();
#ifdef ENABLE_FRONTEND
{
obs_properties_add_button2(props, S_MANUAL_OPEN, D_TRANSLATE(S_MANUAL_OPEN),
streamfx::encoder::ffmpeg::ffmpeg_factory::on_manual_open, this);
}
#endif
if (data) {
data->get_properties(props);
}
if (_handler)
_handler->get_properties(props, _avcodec, nullptr, _handler->is_hardware_encoder(this));
if (_handler && _handler->has_keyframe_support(this)) {
// Key-Frame Options
obs_properties_t* grp = props;
if (!streamfx::util::are_property_groups_broken()) {
grp = obs_properties_create();
obs_properties_add_group(props, ST_I18N_KEYFRAMES, D_TRANSLATE(ST_I18N_KEYFRAMES), OBS_GROUP_NORMAL, grp);
}
{ // Key-Frame Interval Type
auto p =
obs_properties_add_list(grp, ST_KEY_KEYFRAMES_INTERVALTYPE, D_TRANSLATE(ST_I18N_KEYFRAMES_INTERVALTYPE),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_set_modified_callback(p, modified_keyframes);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_KEYFRAMES_INTERVALTYPE_("Seconds")), 0);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_KEYFRAMES_INTERVALTYPE_("Frames")), 1);
}
{ // Key-Frame Interval Seconds
auto p = obs_properties_add_float(grp, ST_KEY_KEYFRAMES_INTERVAL_SECONDS,
D_TRANSLATE(ST_I18N_KEYFRAMES_INTERVAL), 0.00,
std::numeric_limits<int16_t>::max(), 0.01);
obs_property_float_set_suffix(p, " seconds");
}
{ // Key-Frame Interval Frames
auto p =
obs_properties_add_int(grp, ST_KEY_KEYFRAMES_INTERVAL_FRAMES, D_TRANSLATE(ST_I18N_KEYFRAMES_INTERVAL),
0, std::numeric_limits<int32_t>::max(), 1);
obs_property_int_set_suffix(p, " frames");
}
}
{
obs_properties_t* grp = props;
if (!streamfx::util::are_property_groups_broken()) {
auto prs = obs_properties_create();
obs_properties_add_group(props, ST_I18N_FFMPEG, D_TRANSLATE(ST_I18N_FFMPEG), OBS_GROUP_NORMAL, prs);
grp = prs;
}
{ // Custom Settings
auto p =
obs_properties_add_text(grp, ST_KEY_FFMPEG_CUSTOMSETTINGS, D_TRANSLATE(ST_I18N_FFMPEG_CUSTOMSETTINGS),
obs_text_type::OBS_TEXT_DEFAULT);
}
if (_handler && _handler->is_hardware_encoder(this)) {
auto p = obs_properties_add_int(grp, ST_KEY_FFMPEG_GPU, D_TRANSLATE(ST_I18N_FFMPEG_GPU), -1,
std::numeric_limits<uint8_t>::max(), 1);
}
if (_handler && _handler->has_threading_support(this)) {
auto p = obs_properties_add_int_slider(grp, ST_KEY_FFMPEG_THREADS, D_TRANSLATE(ST_I18N_FFMPEG_THREADS), 0,
static_cast<int64_t>(std::thread::hardware_concurrency() * 2), 1);
}
if (_handler && _handler->has_pixel_format_support(this)) {
auto p = obs_properties_add_list(grp, ST_KEY_FFMPEG_COLORFORMAT, D_TRANSLATE(ST_I18N_FFMPEG_COLORFORMAT),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(p, D_TRANSLATE(S_STATE_AUTOMATIC), static_cast<int64_t>(AV_PIX_FMT_NONE));
for (auto ptr = _avcodec->pix_fmts; *ptr != AV_PIX_FMT_NONE; ptr++) {
obs_property_list_add_int(p, ::streamfx::ffmpeg::tools::get_pixel_format_name(*ptr),
static_cast<int64_t>(*ptr));
}
}
{
auto p = obs_properties_add_list(grp, ST_KEY_FFMPEG_STANDARDCOMPLIANCE,
D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE), OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE ".VeryStrict"),
FF_COMPLIANCE_VERY_STRICT);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE ".Strict"),
FF_COMPLIANCE_STRICT);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE ".Normal"),
FF_COMPLIANCE_NORMAL);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE ".Unofficial"),
FF_COMPLIANCE_UNOFFICIAL);
obs_property_list_add_int(p, D_TRANSLATE(ST_I18N_FFMPEG_STANDARDCOMPLIANCE ".Experimental"),
FF_COMPLIANCE_EXPERIMENTAL);
}
};
return props;
}
#ifdef ENABLE_FRONTEND
bool ffmpeg_factory::on_manual_open(obs_properties_t* props, obs_property_t* property, void* data)
{
ffmpeg_factory* ptr = static_cast<ffmpeg_factory*>(data);
streamfx::open_url(ptr->_handler->get_help_url(ptr->_avcodec));
return false;
}
#endif
const AVCodec* ffmpeg_factory::get_avcodec()
{
return _avcodec;
}
obs_encoder_info* streamfx::encoder::ffmpeg::ffmpeg_factory::get_info()
{
return &_info;
}
ffmpeg_manager::ffmpeg_manager() : _factories(), _handlers(), _debug_handler()
{
// Handlers
_debug_handler = ::std::make_shared<handler::debug_handler>();
#ifdef ENABLE_ENCODER_FFMPEG_AMF
register_handler("h264_amf", ::std::make_shared<handler::amf_h264_handler>());
register_handler("hevc_amf", ::std::make_shared<handler::amf_hevc_handler>());
#endif
#ifdef ENABLE_ENCODER_FFMPEG_NVENC
register_handler("h264_nvenc", ::std::make_shared<handler::nvenc_h264_handler>());
register_handler("hevc_nvenc", ::std::make_shared<handler::nvenc_hevc_handler>());
#endif
#ifdef ENABLE_ENCODER_FFMPEG_PRORES
register_handler("prores_aw", ::std::make_shared<handler::prores_aw_handler>());
#endif
}
ffmpeg_manager::~ffmpeg_manager()
{
_factories.clear();
}
void ffmpeg_manager::register_encoders()
{
// Encoders
#if FF_API_NEXT
void* iterator = nullptr;
for (const AVCodec* codec = av_codec_iterate(&iterator); codec != nullptr; codec = av_codec_iterate(&iterator)) {
// Only register encoders.
if (!av_codec_is_encoder(codec))
continue;
if ((codec->type == AVMediaType::AVMEDIA_TYPE_AUDIO) || (codec->type == AVMediaType::AVMEDIA_TYPE_VIDEO)) {
try {
_factories.emplace(codec, std::make_shared<ffmpeg_factory>(codec));
} catch (const std::exception& ex) {
DLOG_ERROR("Failed to register encoder '%s': %s", codec->name, ex.what());
}
}
}
#else
AVCodec* codec = nullptr;
for (codec = av_codec_next(codec); codec != nullptr; codec = av_codec_next(codec)) {
// Only register encoders.
if (!av_codec_is_encoder(codec))
continue;
if ((codec->type == AVMediaType::AVMEDIA_TYPE_AUDIO) || (codec->type == AVMediaType::AVMEDIA_TYPE_VIDEO)) {
try {
_factories.emplace(codec, std::make_shared<ffmpeg_factory>(codec));
} catch (const std::exception& ex) {
DLOG_ERROR("Failed to register encoder '%s': %s", codec->name, ex.what());
}
}
}
#endif
}
void ffmpeg_manager::register_handler(std::string codec, std::shared_ptr<handler::handler> handler)
{
_handlers.emplace(codec, handler);
}
std::shared_ptr<handler::handler> ffmpeg_manager::get_handler(std::string codec)
{
auto fnd = _handlers.find(codec);
if (fnd != _handlers.end())
return fnd->second;
#ifdef _DEBUG
return _debug_handler;
#else
return nullptr;
#endif
}
bool ffmpeg_manager::has_handler(std::string codec)
{
return (_handlers.find(codec) != _handlers.end());
}
std::shared_ptr<ffmpeg_manager> _ffmepg_encoder_factory_instance = nullptr;
void ffmpeg_manager::initialize()
{
if (!_ffmepg_encoder_factory_instance) {
_ffmepg_encoder_factory_instance = std::make_shared<ffmpeg_manager>();
_ffmepg_encoder_factory_instance->register_encoders();
}
}
void ffmpeg_manager::finalize()
{
_ffmepg_encoder_factory_instance.reset();
}
std::shared_ptr<ffmpeg_manager> ffmpeg_manager::get()
{
return _ffmepg_encoder_factory_instance;
}
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