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1.ImGUI display success; 2.To do: fix x264 encode green screen

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dijunkun
2023-11-02 02:34:14 -07:00
parent 9be5d90a69
commit 6e19e53603
6 changed files with 42 additions and 25 deletions
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309
tests/peerconnection/linux_capture.cpp
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@@ -1,309 +0,0 @@
#include <stdio.h>
#define __STDC_CONSTANT_MACROS
#ifdef _WIN32
// Windows
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavformat/avformat.h>
#include <libavutil/imgutils.h>
#include <libswscale/swscale.h>
#include "SDL2/SDL.h"
};
#else
// Linux...
#ifdef __cplusplus
extern "C" {
#endif
#include <SDL2/SDL.h>
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavformat/avformat.h>
#include <libavutil/imgutils.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
};
#endif
#endif
#include <chrono>
// Output YUV420P
#define OUTPUT_YUV420P 0
//'1' Use Dshow
//'0' Use GDIgrab
#define USE_DSHOW 0
// Refresh Event
#define SFM_REFRESH_EVENT (SDL_USEREVENT + 1)
#define SFM_BREAK_EVENT (SDL_USEREVENT + 2)
#define NV12_BUFFER_SIZE 1280 * 720 * 3 / 2
int thread_exit = 0;
SDL_Texture *sdlTexture = nullptr;
SDL_Renderer *sdlRenderer = nullptr;
SDL_Rect sdlRect;
unsigned char nv12_buffer[NV12_BUFFER_SIZE];
std::chrono::_V2::system_clock::time_point last_frame_time;
const int pixel_w = 1280, pixel_h = 720;
int screen_w = 1280, screen_h = 720;
bool done = false;
int YUV420ToNV12FFmpeg(unsigned char *src_buffer, int width, int height,
unsigned char *des_buffer) {
AVFrame *Input_pFrame = av_frame_alloc();
AVFrame *Output_pFrame = av_frame_alloc();
struct SwsContext *img_convert_ctx = sws_getContext(
width, height, AV_PIX_FMT_NV12, width, height, AV_PIX_FMT_YUV420P,
SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
av_image_fill_arrays(Input_pFrame->data, Input_pFrame->linesize, src_buffer,
AV_PIX_FMT_NV12, width, height, 1);
av_image_fill_arrays(Output_pFrame->data, Output_pFrame->linesize, des_buffer,
AV_PIX_FMT_YUV420P, width, height, 1);
sws_scale(img_convert_ctx, (uint8_t const **)Input_pFrame->data,
Input_pFrame->linesize, 0, height, Output_pFrame->data,
Output_pFrame->linesize);
if (Input_pFrame) av_free(Input_pFrame);
if (Output_pFrame) av_free(Output_pFrame);
if (img_convert_ctx) sws_freeContext(img_convert_ctx);
return 0;
}
int sfp_refresh_thread(void *opaque) {
thread_exit = 0;
while (!thread_exit) {
SDL_Event event;
event.type = SFM_REFRESH_EVENT;
SDL_PushEvent(&event);
SDL_Delay(30);
printf("sfp_refresh_thread\n");
}
thread_exit = 0;
// Break
SDL_Event event;
event.type = SFM_BREAK_EVENT;
SDL_PushEvent(&event);
printf("exit sfp_refresh_thread\n");
return 0;
}
int main(int argc, char *argv[]) {
AVFormatContext *pFormatCtx;
int i, videoindex;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVCodecParameters *pCodecParam;
// avformat_network_init();
pFormatCtx = avformat_alloc_context();
// Open File
char filepath[] = "out.h264";
// avformat_open_input(&pFormatCtx, filepath, NULL, NULL);
// Register Device
avdevice_register_all();
// Windows
// Linux
AVDictionary *options = NULL;
// Set some options
// grabbing frame rate
av_dict_set(&options, "framerate", "30", 0);
// Make the grabbed area follow the mouse
av_dict_set(&options, "follow_mouse", "centered", 0);
// Video frame size. The default is to capture the full screen
av_dict_set(&options, "video_size", "1280x720", 0);
AVInputFormat *ifmt = (AVInputFormat *)av_find_input_format("x11grab");
if (!ifmt) {
printf("Couldn't find_input_format\n");
}
// Grab at position 10,20
if (avformat_open_input(&pFormatCtx, ":0.0", ifmt, &options) != 0) {
printf("Couldn't open input stream.\n");
return -1;
}
if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {
printf("Couldn't find stream information.\n");
return -1;
}
videoindex = -1;
for (i = 0; i < pFormatCtx->nb_streams; i++)
if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
videoindex = i;
break;
}
if (videoindex == -1) {
printf("Didn't find a video stream.\n");
return -1;
}
pCodecParam = pFormatCtx->streams[videoindex]->codecpar;
pCodecCtx = avcodec_alloc_context3(NULL);
avcodec_parameters_to_context(pCodecCtx, pCodecParam);
// pCodec = const_cast<AVCodec *>(avcodec_find_decoder(AV_CODEC_ID_H264));
pCodec = const_cast<AVCodec *>(avcodec_find_decoder(pCodecCtx->codec_id));
if (pCodec == NULL) {
printf("Codec not found.\n");
return -1;
}
if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
printf("Could not open codec.\n");
return -1;
}
AVFrame *pFrame, *pFrameYUV, *pFrameNV12;
pFrame = av_frame_alloc();
pFrameYUV = av_frame_alloc();
pFrameNV12 = av_frame_alloc();
// unsigned char *out_buffer=(unsigned char
// *)av_malloc(avpicture_get_size(AV_PIX_FMT_YUV420P, pCodecCtx->width,
// pCodecCtx->height)); avpicture_fill((AVPicture *)pFrameYUV, out_buffer,
// AV_PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
// SDL----------------------------
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
printf("Could not initialize SDL - %s\n", SDL_GetError());
return -1;
}
// const SDL_VideoInfo *vi = SDL_GetVideoInfo();
// Half of the Desktop's width and height.
screen_w = 1280;
screen_h = 720;
// SDL_Surface *screen;
// screen = SDL_SetVideoMode(screen_w, screen_h, 0, 0);
SDL_Window *screen;
screen = SDL_CreateWindow("Linux Capture", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, screen_w, screen_h,
SDL_WINDOW_RESIZABLE);
if (!screen) {
printf("SDL: could not set video mode - exiting:%s\n", SDL_GetError());
return -1;
}
// SDL_Overlay *bmp;
// bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,
// SDL_YV12_OVERLAY, screen);
sdlRenderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED);
Uint32 pixformat = 0;
pixformat = SDL_PIXELFORMAT_NV12;
SDL_Texture *sdlTexture = nullptr;
sdlTexture = SDL_CreateTexture(sdlRenderer, pixformat,
SDL_TEXTUREACCESS_STREAMING, pixel_w, pixel_h);
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = screen_w;
rect.h = screen_h;
// SDL End------------------------
int ret, got_picture;
AVPacket *packet = (AVPacket *)av_malloc(sizeof(AVPacket));
struct SwsContext *img_convert_ctx;
img_convert_ctx = sws_getContext(
pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width,
pCodecCtx->height, AV_PIX_FMT_NV12, SWS_BICUBIC, NULL, NULL, NULL);
//------------------------------
SDL_Thread *video_tid = SDL_CreateThread(sfp_refresh_thread, NULL, NULL);
//
// SDL_WM_SetCaption("Simplest FFmpeg Grab Desktop", NULL);
// Event Loop
SDL_Event event;
last_frame_time = std::chrono::high_resolution_clock::now();
for (;;) {
// Wait
SDL_WaitEvent(&event);
if (1) {
//------------------------------
if (av_read_frame(pFormatCtx, packet) >= 0) {
if (packet->stream_index == videoindex) {
avcodec_send_packet(pCodecCtx, packet);
got_picture = avcodec_receive_frame(pCodecCtx, pFrame);
// ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture,
// packet);
if (ret < 0) {
printf("Decode Error.\n");
return -1;
}
printf("xxxxxxxxxxxxxxxxxxx\n");
if (!got_picture) {
auto now_time = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> duration = now_time - last_frame_time;
auto tc = duration.count() * 1000;
printf("duration: %f\n", tc);
last_frame_time = now_time;
av_image_fill_arrays(pFrameNV12->data, pFrameNV12->linesize,
nv12_buffer, AV_PIX_FMT_NV12, pFrame->width,
pFrame->height, 1);
sws_scale(img_convert_ctx, pFrame->data, pFrame->linesize, 0,
pFrame->height, pFrameNV12->data, pFrameNV12->linesize);
SDL_UpdateTexture(sdlTexture, NULL, nv12_buffer, pixel_w);
// FIX: If window is resize
sdlRect.x = 0;
sdlRect.y = 0;
sdlRect.w = screen_w;
sdlRect.h = screen_h;
SDL_RenderClear(sdlRenderer);
SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, &sdlRect);
SDL_RenderPresent(sdlRenderer);
}
}
// av_free_packet(packet);
} else {
// Exit Thread
// thread_exit = 1;
// printf("No frame read\n");
}
} else if (event.type == SDL_QUIT) {
printf("SDL_QUIT\n");
thread_exit = 1;
} else if (event.type == SFM_BREAK_EVENT) {
break;
}
}
sws_freeContext(img_convert_ctx);
#if OUTPUT_YUV420P
fclose(fp_yuv);
#endif
SDL_Quit();
// av_free(out_buffer);
av_frame_free(&pFrameNV12);
av_free(pFrameYUV);
avcodec_close(pCodecCtx);
avformat_close_input(&pFormatCtx);
getchar();
return 0;
}