ddnet/src/engine/client/video.cpp

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#if defined(CONF_VIDEORECORDER)
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#include <engine/storage.h>
#include <engine/console.h>
#include <engine/shared/config.h>
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#include "video.h"
// This code is mostly stolen from https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/muxing.c
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#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P /* default pix_fmt */
const size_t FORMAT_NCHANNELS = 3;
static LOCK g_WriteLock = 0;
CVideo::CVideo(CGraphics_Threaded* pGraphics, IStorage* pStorage, IConsole *pConsole, int Width, int Height, const char *pName) :
m_pGraphics(pGraphics),
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m_pStorage(pStorage),
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m_pConsole(pConsole),
m_VideoStream(),
m_AudioStream()
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{
m_pPixels = 0;
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m_pFormatContext = 0;
m_pFormat = 0;
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m_pRGB = 0;
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m_pOptDict = 0;
m_VideoCodec = 0;
m_AudioCodec = 0;
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m_Width = Width;
m_Height = Height;
str_copy(m_Name, pName, sizeof(m_Name));
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m_FPS = g_Config.m_ClVideoRecorderFPS;
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m_Recording = false;
m_Started = false;
m_ProcessingVideoFrame = false;
m_ProcessingAudioFrame = false;
m_NextFrame = false;
m_NextAudioFrame = false;
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// TODO:
m_HasAudio = g_Config.m_ClVideoSndEnable;
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m_SndBufferSize = g_Config.m_SndBufferSize;
dbg_assert(ms_pCurrentVideo == 0, "ms_pCurrentVideo is NOT set to NULL while creating a new Video.");
ms_TickTime = time_freq() / m_FPS;
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ms_pCurrentVideo = this;
g_WriteLock = lock_create();
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}
CVideo::~CVideo()
{
ms_pCurrentVideo = 0;
lock_destroy(g_WriteLock);
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}
void CVideo::Start()
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{
char aDate[20];
str_timestamp(aDate, sizeof(aDate));
char aBuf[256];
if(strlen(m_Name) != 0)
str_format(aBuf, sizeof(aBuf), "videos/%s", m_Name);
else
str_format(aBuf, sizeof(aBuf), "videos/%s.mp4", aDate);
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char aWholePath[1024];
IOHANDLE File = m_pStorage->OpenFile(aBuf, IOFLAG_WRITE, IStorage::TYPE_SAVE, aWholePath, sizeof(aWholePath));
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if(File)
{
io_close(File);
}
else
{
dbg_msg("video_recorder", "Failed to open file for recoding video.");
return;
}
avformat_alloc_output_context2(&m_pFormatContext, 0, "mp4", aWholePath);
if(!m_pFormatContext)
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{
dbg_msg("video_recorder", "Failed to create formatcontext for recoding video.");
return;
}
m_pFormat = m_pFormatContext->oformat;
size_t NVals = FORMAT_NCHANNELS * m_Width * m_Height;
m_pPixels = (uint8_t *)malloc(NVals * sizeof(GLubyte));
m_pRGB = (uint8_t *)malloc(NVals * sizeof(uint8_t));
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/* Add the audio and video streams using the default format codecs
* and initialize the codecs. */
if(m_pFormat->video_codec != AV_CODEC_ID_NONE)
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{
AddStream(&m_VideoStream, m_pFormatContext, &m_VideoCodec, m_pFormat->video_codec);
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}
else
{
dbg_msg("video_recorder", "Failed to add VideoStream for recoding video.");
}
if(m_HasAudio && m_pFormat->audio_codec != AV_CODEC_ID_NONE)
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{
AddStream(&m_AudioStream, m_pFormatContext, &m_AudioCodec, m_pFormat->audio_codec);
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}
else
{
dbg_msg("video_recorder", "No audio.");
}
/* Now that all the parameters are set, we can open the audio and
* video codecs and allocate the necessary encode buffers. */
OpenVideo();
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if(m_HasAudio)
OpenAudio();
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// TODO: remove/comment:
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av_dump_format(m_pFormatContext, 0, aWholePath, 1);
/* open the output file, if needed */
if(!(m_pFormat->flags & AVFMT_NOFILE))
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{
int Ret = avio_open(&m_pFormatContext->pb, aWholePath, AVIO_FLAG_WRITE);
if(Ret < 0)
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{
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char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Could not open '%s': %s", aWholePath, aBuf);
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return;
}
}
if(!m_VideoStream.pSwsCtx)
{
m_VideoStream.pSwsCtx = sws_getCachedContext(
m_VideoStream.pSwsCtx,
m_VideoStream.pEnc->width, m_VideoStream.pEnc->height, AV_PIX_FMT_RGB24,
m_VideoStream.pEnc->width, m_VideoStream.pEnc->height, AV_PIX_FMT_YUV420P,
0, 0, 0, 0
);
}
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/* Write the stream header, if any. */
int Ret = avformat_write_header(m_pFormatContext, &m_pOptDict);
if(Ret < 0)
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{
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char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Error occurred when opening output file: %s", aBuf);
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return;
}
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m_Recording = true;
m_Started = true;
ms_Time = time_get();
m_Vframe = 0;
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}
void CVideo::Pause(bool Pause)
{
if(ms_pCurrentVideo)
m_Recording = !Pause;
}
void CVideo::Stop()
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{
m_Recording = false;
while(m_ProcessingVideoFrame || m_ProcessingAudioFrame)
thread_sleep(10);
FinishFrames(&m_VideoStream);
if(m_HasAudio)
FinishFrames(&m_AudioStream);
av_write_trailer(m_pFormatContext);
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CloseStream(&m_VideoStream);
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if(m_HasAudio)
CloseStream(&m_AudioStream);
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//fclose(m_dbgfile);
if(!(m_pFormat->flags & AVFMT_NOFILE))
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avio_closep(&m_pFormatContext->pb);
if(m_pFormatContext)
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avformat_free_context(m_pFormatContext);
if(m_pRGB)
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free(m_pRGB);
if(m_pPixels)
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free(m_pPixels);
if(ms_pCurrentVideo)
delete ms_pCurrentVideo;
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}
void CVideo::NextVideoFrameThread()
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{
if(m_NextFrame && m_Recording)
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{
// #ifdef CONF_PLATFORM_MACOSX
// CAutoreleasePool AutoreleasePool;
// #endif
m_Vseq += 1;
if(m_Vseq >= 2)
{
m_ProcessingVideoFrame = true;
m_VideoStream.pFrame->pts = (int64)m_VideoStream.pEnc->frame_number;
//dbg_msg("video_recorder", "vframe: %d", m_VideoStream.pEnc->frame_number);
ReadRGBFromGL();
FillVideoFrame();
lock_wait(g_WriteLock);
WriteFrame(&m_VideoStream);
lock_unlock(g_WriteLock);
m_ProcessingVideoFrame = false;
}
m_NextFrame = false;
// sync_barrier();
// m_Semaphore.signal();
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}
}
void CVideo::NextVideoFrame()
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{
if(m_Recording)
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{
// #ifdef CONF_PLATFORM_MACOSX
// CAutoreleasePool AutoreleasePool;
// #endif
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//dbg_msg("video_recorder", "called");
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ms_Time += ms_TickTime;
ms_LocalTime = (ms_Time-ms_LocalStartTime)/(float)time_freq();
m_NextFrame = true;
m_Vframe += 1;
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// m_pGraphics->KickCommandBuffer();
//thread_sleep(500);
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// m_Semaphore.wait();
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}
}
void CVideo::NextAudioFrameTimeline()
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{
if(m_Recording && m_HasAudio)
{
//if(m_Vframe * m_AudioStream.pEnc->sample_rate / m_FPS >= m_AudioStream.pEnc->frame_number*m_AudioStream.pEnc->frame_size)
if(m_VideoStream.pEnc->frame_number * (double)m_AudioStream.pEnc->sample_rate / m_FPS >= (double)m_AudioStream.pEnc->frame_number*m_AudioStream.pEnc->frame_size)
{
m_NextAudioFrame = true;
}
}
}
void CVideo::NextAudioFrame(void (*Mix)(short *pFinalOut, unsigned Frames))
{
if(m_NextAudioFrame && m_Recording && m_HasAudio)
{
m_ProcessingAudioFrame = true;
//dbg_msg("video recorder", "video_frame: %lf", (double)(m_Vframe/m_FPS));
//if((double)(m_Vframe/m_FPS) < m_AudioStream.pEnc->frame_number*m_AudioStream.pEnc->frame_size/m_AudioStream.pEnc->sample_rate)
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//return;
Mix(m_aBuffer, ALEN);
//m_AudioStream.pFrame->pts = m_AudioStream.pEnc->frame_number;
//dbg_msg("video_recorder", "aframe: %d", m_AudioStream.pEnc->frame_number);
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// memcpy(m_AudioStream.pTmpFrame->data[0], pData, sizeof(int16_t) * m_SndBufferSize * 2);
//
// for(int i = 0; i < m_SndBufferSize; i++)
// {
// dbg_msg("video_recorder", "test: %d %d", ((int16_t*)pData)[i*2], ((int16_t*)pData)[i*2 + 1]);
// }
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int DstNbSamples;
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av_samples_fill_arrays(
(uint8_t**)m_AudioStream.pTmpFrame->data,
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0, // pointer to linesize (int*)
(const uint8_t*)m_aBuffer,
2, // channels
m_AudioStream.pTmpFrame->nb_samples,
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AV_SAMPLE_FMT_S16,
0 // align
);
DstNbSamples = av_rescale_rnd(
swr_get_delay(
m_AudioStream.pSwrCtx,
m_AudioStream.pEnc->sample_rate
) + m_AudioStream.pTmpFrame->nb_samples,
m_AudioStream.pEnc->sample_rate,
m_AudioStream.pEnc->sample_rate, AV_ROUND_UP
);
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// dbg_msg("video_recorder", "DstNbSamples: %d", DstNbSamples);
// fwrite(m_aBuffer, sizeof(short), 2048, m_dbgfile);
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int Ret = av_frame_make_writable(m_AudioStream.pFrame);
if(Ret < 0)
exit(1);
/* convert to destination format */
Ret = swr_convert(
m_AudioStream.pSwrCtx,
m_AudioStream.pFrame->data,
m_AudioStream.pFrame->nb_samples,
(const uint8_t **)m_AudioStream.pTmpFrame->data,
m_AudioStream.pTmpFrame->nb_samples
);
if(Ret < 0)
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{
dbg_msg("video_recorder", "Error while converting");
exit(1);
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}
// frame = ost->frame;
//
m_AudioStream.pFrame->pts = av_rescale_q(m_AudioStream.SamplesCount, AVRational{1, m_AudioStream.pEnc->sample_rate}, m_AudioStream.pEnc->time_base);
m_AudioStream.SamplesCount += DstNbSamples;
// dbg_msg("video_recorder", "prewrite----");
lock_wait(g_WriteLock);
WriteFrame(&m_AudioStream);
lock_unlock(g_WriteLock);
m_ProcessingAudioFrame = false;
m_NextAudioFrame = false;
}
}
void CVideo::FillAudioFrame()
{
}
void CVideo::FillVideoFrame()
{
const int InLinesize[1] = { 3 * m_VideoStream.pEnc->width };
sws_scale(m_VideoStream.pSwsCtx, (const uint8_t * const *)&m_pRGB, InLinesize, 0,
m_VideoStream.pEnc->height, m_VideoStream.pFrame->data, m_VideoStream.pFrame->linesize);
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}
void CVideo::ReadRGBFromGL()
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{
/* Get RGBA to align to 32 bits instead of just 24 for RGB. May be faster for FFmpeg. */
glReadBuffer(GL_FRONT);
GLint Alignment;
glGetIntegerv(GL_PACK_ALIGNMENT, &Alignment);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
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glReadPixels(0, 0, m_Width, m_Height, GL_RGB, GL_UNSIGNED_BYTE, m_pPixels);
glPixelStorei(GL_PACK_ALIGNMENT, Alignment);
for(int i = 0; i < m_Height; i++)
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{
for(int j = 0; j < m_Width; j++)
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{
size_t CurGL = FORMAT_NCHANNELS * (m_Width * (m_Height - i - 1) + j);
size_t CurRGB = FORMAT_NCHANNELS * (m_Width * i + j);
for(int k = 0; k < (int)FORMAT_NCHANNELS; k++)
m_pRGB[CurRGB + k] = m_pPixels[CurGL + k];
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}
}
}
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AVFrame* CVideo::AllocPicture(enum AVPixelFormat PixFmt, int Width, int Height)
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{
AVFrame* pPicture;
int Ret;
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pPicture = av_frame_alloc();
if(!pPicture)
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return NULL;
pPicture->format = PixFmt;
pPicture->width = Width;
pPicture->height = Height;
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/* allocate the buffers for the frame data */
Ret = av_frame_get_buffer(pPicture, 32);
if(Ret < 0) {
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dbg_msg("video_recorder", "Could not allocate frame data.");
exit(1);
}
return pPicture;
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}
AVFrame* CVideo::AllocAudioFrame(enum AVSampleFormat SampleFmt, uint64 ChannelLayout, int SampleRate, int NbSamples)
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{
AVFrame *Frame = av_frame_alloc();
int Ret;
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if(!Frame) {
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dbg_msg("video_recorder", "Error allocating an audio frame");
exit(1);
}
Frame->format = SampleFmt;
Frame->channel_layout = ChannelLayout;
Frame->sample_rate = SampleRate;
Frame->nb_samples = NbSamples;
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if(NbSamples) {
Ret = av_frame_get_buffer(Frame, 0);
if(Ret < 0) {
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dbg_msg("video_recorder", "Error allocating an audio buffer");
exit(1);
}
}
return Frame;
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}
void CVideo::OpenVideo()
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{
int Ret;
AVCodecContext* c = m_VideoStream.pEnc;
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AVDictionary* opt = 0;
av_dict_copy(&opt, m_pOptDict, 0);
/* open the codec */
Ret = avcodec_open2(c, m_VideoCodec, &opt);
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av_dict_free(&opt);
if(Ret < 0)
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{
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char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Could not open video codec: %s", aBuf);
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exit(1);
}
/* allocate and init a re-usable frame */
m_VideoStream.pFrame = AllocPicture(c->pix_fmt, c->width, c->height);
if(!m_VideoStream.pFrame)
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{
dbg_msg("video_recorder", "Could not allocate video frame");
exit(1);
}
/* If the output format is not YUV420P, then a temporary YUV420P
* picture is needed too. It is then converted to the required
* output format. */
m_VideoStream.pTmpFrame = NULL;
if(c->pix_fmt != AV_PIX_FMT_YUV420P)
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{
m_VideoStream.pTmpFrame = AllocPicture(AV_PIX_FMT_YUV420P, c->width, c->height);
if(!m_VideoStream.pTmpFrame)
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{
dbg_msg("video_recorder", "Could not allocate temporary picture");
exit(1);
}
}
/* copy the stream parameters to the muxer */
Ret = avcodec_parameters_from_context(m_VideoStream.pSt->codecpar, c);
if(Ret < 0)
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{
dbg_msg("video_recorder", "Could not copy the stream parameters");
exit(1);
}
m_Vseq = 0;
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}
void CVideo::OpenAudio()
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{
AVCodecContext *c;
int NbSamples;
int Ret;
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AVDictionary *opt = NULL;
c = m_AudioStream.pEnc;
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/* open it */
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//m_dbgfile = fopen("/tmp/pcm_dbg", "wb");
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av_dict_copy(&opt, m_pOptDict, 0);
Ret = avcodec_open2(c, m_AudioCodec, &opt);
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av_dict_free(&opt);
if(Ret < 0)
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{
char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Could not open audio codec: %s", aBuf);
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exit(1);
}
if(c->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
NbSamples = 10000;
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else
NbSamples = c->frame_size;
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m_AudioStream.pFrame = AllocAudioFrame(c->sample_fmt, c->channel_layout, c->sample_rate, NbSamples);
m_AudioStream.pTmpFrame = AllocAudioFrame(AV_SAMPLE_FMT_S16, AV_CH_LAYOUT_STEREO, g_Config.m_SndRate, m_SndBufferSize * 2);
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/* copy the stream parameters to the muxer */
Ret = avcodec_parameters_from_context(m_AudioStream.pSt->codecpar, c);
if(Ret < 0) {
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dbg_msg("video_recorder", "Could not copy the stream parameters");
exit(1);
}
/* create resampler context */
m_AudioStream.pSwrCtx = swr_alloc();
if(!m_AudioStream.pSwrCtx) {
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dbg_msg("video_recorder", "Could not allocate resampler context");
exit(1);
}
/* set options */
av_opt_set_int(m_AudioStream.pSwrCtx, "in_channel_count", 2, 0);
av_opt_set_int(m_AudioStream.pSwrCtx, "in_sample_rate", g_Config.m_SndRate, 0);
av_opt_set_sample_fmt(m_AudioStream.pSwrCtx, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
av_opt_set_int(m_AudioStream.pSwrCtx, "out_channel_count", c->channels, 0);
av_opt_set_int(m_AudioStream.pSwrCtx, "out_sample_rate", c->sample_rate, 0);
av_opt_set_sample_fmt(m_AudioStream.pSwrCtx, "out_sample_fmt", c->sample_fmt, 0);
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/* initialize the resampling context */
if((Ret = swr_init(m_AudioStream.pSwrCtx)) < 0) {
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dbg_msg("video_recorder", "Failed to initialize the resampling context");
exit(1);
}
}
/* Add an output stream. */
void CVideo::AddStream(OutputStream *pStream, AVFormatContext *pOC, AVCodec **ppCodec, enum AVCodecID CodecId)
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{
AVCodecContext *c;
/* find the encoder */
*ppCodec= avcodec_find_encoder(CodecId);
if(!(*ppCodec))
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{
dbg_msg("video_recorder", "Could not find encoder for '%s'",
avcodec_get_name(CodecId));
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exit(1);
}
pStream->pSt = avformat_new_stream(pOC, NULL);
if(!pStream->pSt)
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{
dbg_msg("video_recorder", "Could not allocate stream");
exit(1);
}
pStream->pSt->id = pOC->nb_streams-1;
c = avcodec_alloc_context3(*ppCodec);
if(!c)
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{
dbg_msg("video_recorder", "Could not alloc an encoding context");
exit(1);
}
pStream->pEnc = c;
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switch ((*ppCodec)->type)
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{
case AVMEDIA_TYPE_AUDIO:
// m_MixingRate = g_Config.m_SndRate;
//
// // Set 16-bit stereo audio at 22Khz
// Format.freq = g_Config.m_SndRate; // ignore_convention
// Format.format = AUDIO_S16; // ignore_convention
// Format.channels = 2; // ignore_convention
// Format.samples = g_Config.m_SndBufferSize; // ignore_convention
c->sample_fmt = (*ppCodec)->sample_fmts ? (*ppCodec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP;
c->bit_rate = g_Config.m_SndRate * 2 * 16;
c->frame_size = m_SndBufferSize;
c->sample_rate = g_Config.m_SndRate;
if((*ppCodec)->supported_samplerates)
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{
c->sample_rate = (*ppCodec)->supported_samplerates[0];
for(int i = 0; (*ppCodec)->supported_samplerates[i]; i++)
{
if((*ppCodec)->supported_samplerates[i] == g_Config.m_SndRate)
c->sample_rate = g_Config.m_SndRate;
}
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}
c->channels = 2;
c->channel_layout = AV_CH_LAYOUT_STEREO;
pStream->pSt->time_base.num = 1;
pStream->pSt->time_base.den = c->sample_rate;
break;
case AVMEDIA_TYPE_VIDEO:
c->codec_id = CodecId;
c->bit_rate = 400000;
/* Resolution must be a multiple of two. */
c->width = m_Width;
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c->height = m_Height%2==0?m_Height:m_Height-1;
/* timebase: This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identical to 1. */
pStream->pSt->time_base.num = 1;
pStream->pSt->time_base.den = m_FPS;
c->time_base = pStream->pSt->time_base;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if(c->codec_id == AV_CODEC_ID_MPEG2VIDEO)
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{
/* just for testing, we also add B-frames */
c->max_b_frames = 2;
}
if(c->codec_id == AV_CODEC_ID_MPEG1VIDEO)
{
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
c->mb_decision = 2;
}
if(CodecId == AV_CODEC_ID_H264)
{
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const char *presets[10] = {"ultrafast", "superfast", "veryfast", "faster", "fast", "medium", "slow", "slower", "veryslow", "placebo"};
//av_opt_set(c->priv_data, "preset", "slow", 0);
//av_opt_set_int(c->priv_data, "crf", 22, 0);
av_opt_set(c->priv_data, "preset", presets[g_Config.m_ClVideoX264Preset], 0);
av_opt_set_int(c->priv_data, "crf", g_Config.m_ClVideoX264Crf, 0);
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}
break;
default:
break;
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}
/* Some formats want stream headers to be separate. */
if(pOC->oformat->flags & AVFMT_GLOBALHEADER)
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c->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}
void CVideo::WriteFrame(OutputStream* pStream)
{
//lock_wait(g_WriteLock);
int RetRecv = 0;
AVPacket Packet = { 0 };
av_init_packet(&Packet);
Packet.data = 0;
Packet.size = 0;
avcodec_send_frame(pStream->pEnc, pStream->pFrame);
do
{
RetRecv = avcodec_receive_packet(pStream->pEnc, &Packet);
if(!RetRecv)
{
/* rescale output packet timestamp values from codec to stream timebase */
av_packet_rescale_ts(&Packet, pStream->pEnc->time_base, pStream->pSt->time_base);
Packet.stream_index = pStream->pSt->index;
if(int Ret = av_interleaved_write_frame(m_pFormatContext, &Packet))
{
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char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Error while writing video frame: %s", aBuf);
}
}
else
break;
} while(true);
if(RetRecv && RetRecv != AVERROR(EAGAIN))
{
dbg_msg("video_recorder", "Error encoding frame, error: %d", RetRecv);
}
//lock_unlock(g_WriteLock);
}
void CVideo::FinishFrames(OutputStream* pStream)
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{
dbg_msg("video_recorder", "------------");
int RetRecv = 0;
AVPacket Packet = { 0 };
av_init_packet(&Packet);
Packet.data = 0;
Packet.size = 0;
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avcodec_send_frame(pStream->pEnc, 0);
do
{
RetRecv = avcodec_receive_packet(pStream->pEnc, &Packet);
if(!RetRecv)
{
/* rescale output packet timestamp values from codec to stream timebase */
//if(pStream->pSt->codec->codec_type == AVMEDIA_TYPE_AUDIO)
av_packet_rescale_ts(&Packet, pStream->pEnc->time_base, pStream->pSt->time_base);
Packet.stream_index = pStream->pSt->index;
if(int Ret = av_interleaved_write_frame(m_pFormatContext, &Packet))
{
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char aBuf[AV_ERROR_MAX_STRING_SIZE];
av_strerror(Ret, aBuf, sizeof(aBuf));
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dbg_msg("video_recorder", "Error while writing video frame: %s", aBuf);
}
}
else
break;
} while(true);
if(RetRecv && RetRecv != AVERROR_EOF)
{
dbg_msg("video_recorder", "failed to finish recoding, error: %d", RetRecv);
}
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}
void CVideo::CloseStream(OutputStream* pStream)
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{
avcodec_free_context(&pStream->pEnc);
av_frame_free(&pStream->pFrame);
av_frame_free(&pStream->pTmpFrame);
sws_freeContext(pStream->pSwsCtx);
swr_free(&pStream->pSwrCtx);
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}
#endif