floraachy/SpireCV
1
0
Fork 0
forked from floratest1/SpireCV
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fst commit

Browse Source
This commit is contained in:
jario-jin
2023-06-16 10:42:02 +08:00
parent 5793dd0af6
commit 0136d3c2da
122 changed files with 25173 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
video_io/ffmpeg/bs_push_streamer.cpp
+377
View File
@@ -0,0 +1,377 @@
#include "bs_push_streamer.h"
/*
amov_rtsp
2914e3c44737811096c5e1797fe5373d12fcdd39
*/
// char av_error[AV_ERROR_MAX_STRING_SIZE] = { 0 };
// #define av_err2str(errnum) av_make_error_string(av_error, AV_ERROR_MAX_STRING_SIZE, errnum)
BsPushStreamer::BsPushStreamer()
{
}
BsPushStreamer::~BsPushStreamer()
{
mThread->join();
mThread = nullptr;
}
bool BsPushStreamer::setup(std::string name, int width, int height, int fps, std::string encoder, int bitrate = 4)
{
if (!connect(name, width, height, fps, encoder, bitrate))
{
std::cout << "BsPushStreamer::setup error\n";
return false;
}
mVideoFrame = new VideoFrame(VideoFrame::BGR, width, height);
// std::cout << "BsStreamer::setup Success!\n";
start();
return true;
}
void BsPushStreamer::start()
{
mThread = new std::thread(BsPushStreamer::encodeVideoAndWriteStreamThread, this);
mThread->native_handle();
push_running = true;
}
bool BsPushStreamer::connect(std::string name, int width, int height, int fps, std::string encoder, int bitrate)
{
// 初始化上下文
if (avformat_alloc_output_context2(&mFmtCtx, NULL, "rtsp", name.c_str()) < 0)
{
std::cout << "avformat_alloc_output_context2 error\n";
return false;
}
// 初始化视频编码器
// AVCodec *videoCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
// AVCodec *videoCodec = avcodec_find_encoder_by_name("h264_nvenc");
AVCodec *videoCodec = avcodec_find_encoder_by_name(encoder.c_str());
if (!videoCodec)
{
std::cout << fmt::format("Using encoder:[{}] error!\n", encoder);
videoCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
if (!videoCodec)
{
std::cout << "avcodec_alloc_context3 error";
return false;
}
std::cout << "Using default H264 encoder!\n";
}
mVideoCodecCtx = avcodec_alloc_context3(videoCodec);
if (!mVideoCodecCtx)
{
std::cout << "avcodec_alloc_context3 error";
return false;
}
// 压缩视频bit位大小 300kB
int bit_rate = bitrate * 1024 * 1024 * 8;
// CBR：Constant BitRate - 固定比特率
mVideoCodecCtx->flags |= AV_CODEC_FLAG_QSCALE;
mVideoCodecCtx->bit_rate = bit_rate;
mVideoCodecCtx->rc_min_rate = bit_rate;
mVideoCodecCtx->rc_max_rate = bit_rate;
mVideoCodecCtx->bit_rate_tolerance = bit_rate;
mVideoCodecCtx->codec_id = videoCodec->id;
// 不支持AV_PIX_FMT_BGR24直接进行编码
mVideoCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
mVideoCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
mVideoCodecCtx->width = width;
mVideoCodecCtx->height = height;
mVideoCodecCtx->time_base = {1, fps};
mVideoCodecCtx->framerate = {fps, 1};
mVideoCodecCtx->gop_size = 12;
mVideoCodecCtx->max_b_frames = 0;
mVideoCodecCtx->thread_count = 1;
// 手动设置PPS
// unsigned char sps_pps[] = {
// 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x2a, 0x96, 0x35, 0x40, 0xf0, 0x04,
// 0x4f, 0xcb, 0x37, 0x01, 0x01, 0x01, 0x40, 0x00, 0x01, 0xc2, 0x00, 0x00, 0x57,
// 0xe4, 0x01, 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x3c, 0x80, 0x00
// };
AVDictionary *video_codec_options = NULL;
av_dict_set(&video_codec_options, "profile", "main", 0);
// av_dict_set(&video_codec_options, "preset", "superfast", 0);
av_dict_set(&video_codec_options, "tune", "fastdecode", 0);
if (avcodec_open2(mVideoCodecCtx, videoCodec, &video_codec_options) < 0)
{
std::cout << "avcodec_open2 error\n";
return false;
}
mVideoStream = avformat_new_stream(mFmtCtx, videoCodec);
if (!mVideoStream)
{
std::cout << "avformat_new_stream error\n";
return false;
}
mVideoStream->id = mFmtCtx->nb_streams - 1;
// stream的time_base参数非常重要，它表示将现实中的一秒钟分为多少个时间基, 在下面调用avformat_write_header时自动完成
avcodec_parameters_from_context(mVideoStream->codecpar, mVideoCodecCtx);
mVideoIndex = mVideoStream->id;
// open output url
av_dump_format(mFmtCtx, 0, name.c_str(), 1);
if (!(mFmtCtx->oformat->flags & AVFMT_NOFILE))
{
int ret = avio_open(&mFmtCtx->pb, name.c_str(), AVIO_FLAG_WRITE);
if ( ret < 0)
{
std::cout << fmt::format("avio_open error url: {}\n", name.c_str());
// std::cout << fmt::format("ret = {} : {}\n", ret, av_err2str(ret));
std::cout << fmt::format("ret = {}\n", ret);
return false;
}
}
AVDictionary *fmt_options = NULL;
av_dict_set(&fmt_options, "bufsize", "1024", 0);
av_dict_set(&fmt_options, "rw_timeout", "30000000", 0); // 设置rtmp/http-flv连接超时（单位 us）
av_dict_set(&fmt_options, "stimeout", "30000000", 0); // 设置rtsp连接超时（单位 us）
av_dict_set(&fmt_options, "rtsp_transport", "tcp", 0);
mFmtCtx->video_codec_id = mFmtCtx->oformat->video_codec;
mFmtCtx->audio_codec_id = mFmtCtx->oformat->audio_codec;
// 调用该函数会将所有stream的time_base，自动设置一个值，通常是1/90000或1/1000，这表示一秒钟表示的时间基长度
if (avformat_write_header(mFmtCtx, &fmt_options) < 0)
{
std::cout << "avformat_write_header error\n";
return false;
}
return true;
}
void BsPushStreamer::encodeVideoAndWriteStreamThread(void* arg)
{
// PushExecutor *executor = (PushExecutor *)arg;
BsPushStreamer *mBsPushStreamer = (BsPushStreamer *)arg;
int width = mBsPushStreamer->mVideoFrame->width;
int height = mBsPushStreamer->mVideoFrame->height;
// 未编码的视频帧（bgr格式）
// VideoFrame *videoFrame = NULL;
// 未编码视频帧队列当前长度
// int videoFrameQSize = 0;
AVFrame *frame_yuv420p = av_frame_alloc();
frame_yuv420p->format = mBsPushStreamer->mVideoCodecCtx->pix_fmt;
frame_yuv420p->width = width;
frame_yuv420p->height = height;
int frame_yuv420p_buff_size = av_image_get_buffer_size(AV_PIX_FMT_YUV420P, width, height, 1);
uint8_t *frame_yuv420p_buff = (uint8_t *)av_malloc(frame_yuv420p_buff_size);
av_image_fill_arrays(
frame_yuv420p->data, frame_yuv420p->linesize,
frame_yuv420p_buff,
AV_PIX_FMT_YUV420P,
width, height, 1);
// 编码后的视频帧
AVPacket *pkt = av_packet_alloc();
int64_t encodeSuccessCount = 0;
int64_t frameCount = 0;
int64_t t1 = 0;
int64_t t2 = 0;
int ret = -1;
auto cnt_time = std::chrono::system_clock::now().time_since_epoch();
auto last_update_time = std::chrono::system_clock::now().time_since_epoch();
while (mBsPushStreamer->push_running)
{
// if (mBsPushStreamer->getVideoFrame(videoFrame, videoFrameQSize))
if (mBsPushStreamer->nd_push_frame)
{
mBsPushStreamer->nd_push_frame = false;
// frame_bgr 转 frame_yuv420p
mBsPushStreamer->bgr24ToYuv420p(mBsPushStreamer->mVideoFrame->data, width, height, frame_yuv420p_buff);
frame_yuv420p->pts = frame_yuv420p->pkt_dts = av_rescale_q_rnd(
frameCount,
mBsPushStreamer->mVideoCodecCtx->time_base,
mBsPushStreamer->mVideoStream->time_base,
(AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
frame_yuv420p->pkt_duration = av_rescale_q_rnd(
1,
mBsPushStreamer->mVideoCodecCtx->time_base,
mBsPushStreamer->mVideoStream->time_base,
(AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
frame_yuv420p->pkt_pos = -1;
t1 = getCurTime();
ret = avcodec_send_frame(mBsPushStreamer->mVideoCodecCtx, frame_yuv420p);
if (ret >= 0)
{
ret = avcodec_receive_packet(mBsPushStreamer->mVideoCodecCtx, pkt);
if (ret >= 0)
{
t2 = getCurTime();
encodeSuccessCount++;
// 如果实际推流的是flv文件，不会执行里面的fix_packet_pts
if (pkt->pts == AV_NOPTS_VALUE)
{
std::cout << "pkt->pts == AV_NOPTS_VALUE\n";
}
pkt->stream_index = mBsPushStreamer->mVideoIndex;
pkt->pos = -1;
pkt->duration = frame_yuv420p->pkt_duration;
ret = mBsPushStreamer->writePkt(pkt);
if (ret < 0)
{
std::cout << fmt::format("writePkt : ret = {}\n", ret);
}
}
else
{
// std::cout << fmt::format("avcodec_receive_packet error : ret = {}\n", ret);
}
}
else
{
std::cout << fmt::format("avcodec_send_frame error : ret = {}\n", ret);
}
frameCount++;
}
else
{
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
}
// std::cout << fmt::format("push_running is false!\n");
// std::cout << fmt::format("end stream!\n");
// av_write_trailer(mFmtCtx); //写文件尾
av_packet_unref(pkt);
pkt = NULL;
av_free(frame_yuv420p_buff);
frame_yuv420p_buff = NULL;
av_frame_free(&frame_yuv420p);
// av_frame_unref(frame_yuv420p);
frame_yuv420p = NULL;
}
int BsPushStreamer::writePkt(AVPacket* pkt) {
mWritePkt_mtx.lock();
int ret = av_write_frame(mFmtCtx, pkt);
mWritePkt_mtx.unlock();
return ret;
}
bool BsPushStreamer::getVideoFrame(VideoFrame *&frame, int &frameQSize)
{
mRGB_VideoFrameQ_mtx.lock();
if (!mRGB_VideoFrameQ.empty())
{
frame = mRGB_VideoFrameQ.front();
mRGB_VideoFrameQ.pop();
frameQSize = mRGB_VideoFrameQ.size();
mRGB_VideoFrameQ_mtx.unlock();
return true;
}
else
{
frameQSize = 0;
mRGB_VideoFrameQ_mtx.unlock();
return false;
}
}
// void BsPushStreamer::pushVideoFrame(unsigned char *data, int width,int height)
void BsPushStreamer::stream(cv::Mat& image)
{
int size = image.cols * image.rows * image.channels();
// VideoFrame* frame = new VideoFrame(VideoFrame::BGR, image.cols, image.rows, size);
memcpy(mVideoFrame->data, image.data, size);
mRGB_VideoFrameQ_mtx.lock();
nd_push_frame = true;
// mRGB_VideoFrameQ.push(frame);
mRGB_VideoFrameQ_mtx.unlock();
}
bool BsPushStreamer::videoFrameQisEmpty()
{
return mRGB_VideoFrameQ.empty();
}
unsigned char BsPushStreamer::clipValue(unsigned char x, unsigned char min_val, unsigned char max_val)
{
if (x > max_val) { return max_val; }
else if (x < min_val) { return min_val; }
else { return x; }
}
bool BsPushStreamer::bgr24ToYuv420p(unsigned char *bgrBuf, int w, int h, unsigned char *yuvBuf)
{
unsigned char *ptrY, *ptrU, *ptrV, *ptrRGB;
memset(yuvBuf, 0, w * h * 3 / 2);
ptrY = yuvBuf;
ptrU = yuvBuf + w * h;
ptrV = ptrU + (w * h * 1 / 4);
unsigned char y, u, v, r, g, b;
for (int j = 0; j < h; ++j)
{
ptrRGB = bgrBuf + w * j * 3;
for (int i = 0; i < w; i++)
{
b = *(ptrRGB++);
g = *(ptrRGB++);
r = *(ptrRGB++);
y = (unsigned char)((66 * r + 129 * g + 25 * b + 128) >> 8) + 16;
u = (unsigned char)((-38 * r - 74 * g + 112 * b + 128) >> 8) + 128;
v = (unsigned char)((112 * r - 94 * g - 18 * b + 128) >> 8) + 128;
*(ptrY++) = clipValue(y, 0, 255);
if (j % 2 == 0 && i % 2 == 0)
{
*(ptrU++) = clipValue(u, 0, 255);
}
else
{
if (i % 2 == 0)
{
*(ptrV++) = clipValue(v, 0, 255);
}
}
}
}
return true;
}