mirror of
https://github.com/kunkundi/crossdesk.git
synced 2025-10-26 20:25:34 +08:00
368 lines
11 KiB
C++
368 lines
11 KiB
C++
#include <stdio.h>
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#define __STDC_CONSTANT_MACROS
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#ifdef _WIN32
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// Windows
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavdevice/avdevice.h>
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#include <libavformat/avformat.h>
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#include <libavutil/imgutils.h>
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#include <libswscale/swscale.h>
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#include "SDL2/SDL.h"
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};
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#else
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// Linux...
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <SDL/SDL.h>
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#include <libavcodec/avcodec.h>
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#include <libavdevice/avdevice.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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#ifdef __cplusplus
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};
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#endif
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#endif
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// Output YUV420P
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#define OUTPUT_YUV420P 0
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//'1' Use Dshow
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//'0' Use GDIgrab
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#define USE_DSHOW 0
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// Refresh Event
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#define SFM_REFRESH_EVENT (SDL_USEREVENT + 1)
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#define SFM_BREAK_EVENT (SDL_USEREVENT + 2)
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int thread_exit = 0;
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SDL_Texture *sdlTexture = nullptr;
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SDL_Renderer *sdlRenderer = nullptr;
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SDL_Rect sdlRect;
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int YUV420ToNV12FFmpeg(unsigned char *src_buffer, int width, int height,
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unsigned char *des_buffer) {
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AVFrame *Input_pFrame = av_frame_alloc();
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AVFrame *Output_pFrame = av_frame_alloc();
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struct SwsContext *img_convert_ctx = sws_getContext(
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width, height, AV_PIX_FMT_NV12, width, height, AV_PIX_FMT_YUV420P,
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SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
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av_image_fill_arrays(Input_pFrame->data, Input_pFrame->linesize, src_buffer,
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AV_PIX_FMT_NV12, width, height, 1);
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av_image_fill_arrays(Output_pFrame->data, Output_pFrame->linesize, des_buffer,
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AV_PIX_FMT_YUV420P, width, height, 1);
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sws_scale(img_convert_ctx, (uint8_t const **)Input_pFrame->data,
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Input_pFrame->linesize, 0, height, Output_pFrame->data,
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Output_pFrame->linesize);
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if (Input_pFrame) av_free(Input_pFrame);
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if (Output_pFrame) av_free(Output_pFrame);
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if (img_convert_ctx) sws_freeContext(img_convert_ctx);
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return 0;
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}
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int sfp_refresh_thread(void *opaque) {
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thread_exit = 0;
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while (!thread_exit) {
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SDL_Event event;
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event.type = SFM_REFRESH_EVENT;
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SDL_PushEvent(&event);
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SDL_Delay(40);
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}
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thread_exit = 0;
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// Break
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SDL_Event event;
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event.type = SFM_BREAK_EVENT;
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SDL_PushEvent(&event);
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return 0;
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}
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// Show Dshow Device
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// void show_dshow_device() {
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// AVFormatContext *pFormatCtx = avformat_alloc_context();
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// AVDictionary *options = NULL;
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// av_dict_set(&options, "list_devices", "true", 0);
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// AVInputFormat *iformat = av_find_input_format("dshow");
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// printf("========Device Info=============\n");
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// avformat_open_input(&pFormatCtx, "video=dummy", iformat, &options);
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// printf("================================\n");
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// }
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// Show AVFoundation Device
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void show_avfoundation_device() {
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const AVFormatContext *const_pFormatCtx = avformat_alloc_context();
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AVFormatContext *pFormatCtx = const_cast<AVFormatContext *>(const_pFormatCtx);
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AVDictionary *options = NULL;
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av_dict_set(&options, "list_devices", "true", 0);
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const AVInputFormat *const_iformat = av_find_input_format("avfoundation");
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AVInputFormat *iformat = const_cast<AVInputFormat *>(const_iformat);
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printf("==AVFoundation Device Info===\n");
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avformat_open_input(&pFormatCtx, "", iformat, &options);
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printf("=============================\n");
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}
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int main(int argc, char *argv[]) {
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AVFormatContext *pFormatCtx;
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int i, videoindex;
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AVCodecContext *pCodecCtx;
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AVCodec *pCodec;
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avformat_network_init();
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pFormatCtx = avformat_alloc_context();
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// Open File
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// char filepath[]="src01_480x272_22.h265";
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// avformat_open_input(&pFormatCtx,filepath,NULL,NULL)
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// Register Device
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avdevice_register_all();
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// Windows
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#ifdef _WIN32
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#if USE_DSHOW
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// Use dshow
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//
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// Need to Install screen-capture-recorder
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// screen-capture-recorder
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// Website: http://sourceforge.net/projects/screencapturer/
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//
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AVInputFormat *ifmt = av_find_input_format("dshow");
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if (avformat_open_input(&pFormatCtx, "video=screen-capture-recorder", ifmt,
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NULL) != 0) {
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printf("Couldn't open input stream.\n");
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return -1;
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}
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#else
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// Use gdigrab
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AVDictionary *options = NULL;
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// Set some options
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// grabbing frame rate
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// av_dict_set(&options,"framerate","5",0);
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// The distance from the left edge of the screen or desktop
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// av_dict_set(&options,"offset_x","20",0);
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// The distance from the top edge of the screen or desktop
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// av_dict_set(&options,"offset_y","40",0);
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// Video frame size. The default is to capture the full screen
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// av_dict_set(&options,"video_size","640x480",0);
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const AVInputFormat *ifmt = av_find_input_format("gdigrab");
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if (avformat_open_input(&pFormatCtx, "desktop", ifmt, &options) != 0) {
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printf("Couldn't open input stream.\n");
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return -1;
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}
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#endif
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#elif defined linux
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// Linux
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AVDictionary *options = NULL;
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// Set some options
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// grabbing frame rate
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// av_dict_set(&options,"framerate","5",0);
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// Make the grabbed area follow the mouse
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// av_dict_set(&options,"follow_mouse","centered",0);
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// Video frame size. The default is to capture the full screen
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// av_dict_set(&options,"video_size","640x480",0);
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AVInputFormat *ifmt = av_find_input_format("x11grab");
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// Grab at position 10,20
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if (avformat_open_input(&pFormatCtx, ":0.0+10,20", ifmt, &options) != 0) {
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printf("Couldn't open input stream.\n");
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return -1;
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}
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#else
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show_avfoundation_device();
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// Mac
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AVInputFormat *ifmt = av_find_input_format("avfoundation");
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// Avfoundation
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//[video]:[audio]
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if (avformat_open_input(&pFormatCtx, "1", ifmt, NULL) != 0) {
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printf("Couldn't open input stream.\n");
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return -1;
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}
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#endif
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if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {
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printf("Couldn't find stream information.\n");
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return -1;
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}
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videoindex = -1;
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for (i = 0; i < pFormatCtx->nb_streams; i++)
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if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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videoindex = i;
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break;
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}
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if (videoindex == -1) {
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printf("Didn't find a video stream.\n");
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return -1;
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}
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// pCodecCtx = pFormatCtx->streams[videoindex]->codec;
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pCodecCtx = avcodec_alloc_context3(NULL);
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avcodec_parameters_to_context(pCodecCtx,
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pFormatCtx->streams[videoindex]->codecpar);
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pCodec = const_cast<AVCodec *>(avcodec_find_decoder(pCodecCtx->codec_id));
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// pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
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if (pCodec == NULL) {
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printf("Codec not found.\n");
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return -1;
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}
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if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
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printf("Could not open codec.\n");
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return -1;
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}
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AVFrame *pFrame, *pFrameYUV;
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pFrame = av_frame_alloc();
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pFrameYUV = av_frame_alloc();
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// unsigned char *out_buffer=(unsigned char
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// *)av_malloc(avpicture_get_size(AV_PIX_FMT_YUV420P, pCodecCtx->width,
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// pCodecCtx->height)); avpicture_fill((AVPicture *)pFrameYUV, out_buffer,
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// AV_PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
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// SDL----------------------------
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if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
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printf("Could not initialize SDL - %s\n", SDL_GetError());
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return -1;
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}
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const int pixel_w = 640, pixel_h = 360;
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int screen_w = 640, screen_h = 360;
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// const SDL_VideoInfo *vi = SDL_GetVideoInfo();
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// Half of the Desktop's width and height.
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screen_w = 640;
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screen_h = 360;
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// SDL_Surface *screen;
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// screen = SDL_SetVideoMode(screen_w, screen_h, 0, 0);
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SDL_Window *screen;
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screen = SDL_CreateWindow("RTS Receiver", SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED, screen_w, screen_h,
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SDL_WINDOW_RESIZABLE);
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if (!screen) {
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printf("SDL: could not set video mode - exiting:%s\n", SDL_GetError());
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return -1;
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}
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// SDL_Overlay *bmp;
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// bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,
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// SDL_YV12_OVERLAY, screen);
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sdlRenderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED);
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Uint32 pixformat = 0;
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pixformat = SDL_PIXELFORMAT_NV12;
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SDL_Texture *sdlTexture = nullptr;
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sdlTexture = SDL_CreateTexture(sdlRenderer, pixformat,
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SDL_TEXTUREACCESS_STREAMING, pixel_w, pixel_h);
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SDL_Rect rect;
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rect.x = 0;
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rect.y = 0;
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rect.w = screen_w;
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rect.h = screen_h;
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// SDL End------------------------
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int ret, got_picture;
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AVPacket *packet = (AVPacket *)av_malloc(sizeof(AVPacket));
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#if OUTPUT_YUV420P
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FILE *fp_yuv = fopen("output.yuv", "wb+");
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#endif
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struct SwsContext *img_convert_ctx;
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img_convert_ctx = sws_getContext(
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pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width,
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pCodecCtx->height, AV_PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
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//------------------------------
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SDL_Thread *video_tid = SDL_CreateThread(sfp_refresh_thread, NULL, NULL);
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//
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// SDL_WM_SetCaption("Simplest FFmpeg Grab Desktop", NULL);
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// Event Loop
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SDL_Event event;
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for (;;) {
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// Wait
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SDL_WaitEvent(&event);
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if (event.type == SFM_REFRESH_EVENT) {
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//------------------------------
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if (av_read_frame(pFormatCtx, packet) >= 0) {
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if (packet->stream_index == videoindex) {
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avcodec_send_packet(pCodecCtx, packet);
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got_picture = avcodec_receive_frame(pCodecCtx, pFrame);
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// ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture,
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// packet);
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if (ret < 0) {
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printf("Decode Error.\n");
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return -1;
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}
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if (got_picture) {
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// SDL_LockYUVOverlay(bmp);
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// pFrameYUV->data[0] = bmp->pixels[0];
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// pFrameYUV->data[1] = bmp->pixels[2];
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// pFrameYUV->data[2] = bmp->pixels[1];
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// pFrameYUV->linesize[0] = bmp->pitches[0];
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// pFrameYUV->linesize[1] = bmp->pitches[2];
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// pFrameYUV->linesize[2] = bmp->pitches[1];
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// sws_scale(img_convert_ctx,
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// (const unsigned char *const *)pFrame->data,
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// pFrame->linesize, 0, pCodecCtx->height,
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// pFrameYUV->data, pFrameYUV->linesize);
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// #if OUTPUT_YUV420P
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// int y_size = pCodecCtx->width * pCodecCtx->height;
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// fwrite(pFrameYUV->data[0], 1, y_size, fp_yuv); // Y
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// fwrite(pFrameYUV->data[1], 1, y_size / 4, fp_yuv); //
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// U fwrite(pFrameYUV->data[2], 1, y_size / 4, fp_yuv);
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// // V
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// #endif
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// SDL_UnlockYUVOverlay(bmp);
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// SDL_DisplayYUVOverlay(bmp, &rect);
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// YUV420ToNV12FFmpeg(buffer, pixel_w, pixel_h, dst_buffer);
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// SDL_UpdateTexture(sdlTexture, NULL, dst_buffer, pixel_w);
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// // FIX: If window is resize
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// sdlRect.x = 0;
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// sdlRect.y = 0;
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// sdlRect.w = screen_w;
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// sdlRect.h = screen_h;
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// SDL_RenderClear(sdlRenderer);
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// SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, &sdlRect);
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// SDL_RenderPresent(sdlRenderer);
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}
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}
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// av_free_packet(packet);
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} else {
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// Exit Thread
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thread_exit = 1;
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}
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} else if (event.type == SDL_QUIT) {
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thread_exit = 1;
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} else if (event.type == SFM_BREAK_EVENT) {
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break;
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}
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}
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sws_freeContext(img_convert_ctx);
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#if OUTPUT_YUV420P
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fclose(fp_yuv);
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#endif
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SDL_Quit();
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// av_free(out_buffer);
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av_free(pFrameYUV);
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avcodec_close(pCodecCtx);
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avformat_close_input(&pFormatCtx);
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return 0;
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} |