// Get a pointer to the codec context for the video stream
AVCodecContext * pCodecCtx = pFormatCtx->streams[videoStream]->codec;
-LOGE("============= %d ========",__LINE__);
+ LOGE("============= %d ========",__LINE__);
// Find the decoder for the video stream
AVCodec * pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL) {
return -1;
}
- // avcodec_alloc_context3()
AVCodecContext *pCodecCtx = pFormatCtx->streams[video_index]->codec;
if(avcodec_open2(pCodecCtx, dec, NULL) <0){
LOGE( "eee");
// Open Output
- //const char* out_path = "./abc.flv";
const char* out_path = "rtmp://192.168.1.35:1935/myapp/peng2";
- // const char* out_path = "/storage/sdcard0/output222.flv";
AVFormatContext *ofmt_ctx;
avformat_alloc_output_context2(&ofmt_ctx, NULL, "flv", out_path);
av_free(pFrameYUV);
avcodec_close(pCodecCtx);
avformat_close_input(&pFormatCtx);
+ return 0;
+}
+
+JNIEXPORT jint JNICALL Java_ai_suanzi_rtmpclient_Ffmpeg_preview (JNIEnv *env, jobject obj, jobject surface){
+
+ LOGE("###### video preview #####");
+
+ av_register_all();
+ avdevice_register_all();
+
+
+ AVFormatContext * pFormatCtx = avformat_alloc_context();
+
+
+ av_log_set_callback(custom_log);
+
+ AVInputFormat *ifmt=av_find_input_format("video4linux2");
+ LOGE("===%s===", ifmt->name);
+ if(avformat_open_input(&pFormatCtx,"/dev/video0",ifmt,NULL)!=0){
+ LOGE("Couldn't open file:\n");
+ return -1; // Couldn't open file
+ }
+
+ // Retrieve stream information
+ if(avformat_find_stream_info(pFormatCtx, NULL)<0) {
+ LOGE("Couldn't find stream information.");
+ return -1;
+ }
+
+ // Find the first video stream
+ int videoStream = -1, i;
+ for (i = 0; i < pFormatCtx->nb_streams; i++) {
+ if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO
+ && videoStream < 0) {
+ videoStream = i;
+ }
+ }
+ if(videoStream==-1) {
+ LOGE("Didn't find a video stream.");
+ return -1; // Didn't find a video stream
+ }
+
+ // Get a pointer to the codec context for the video stream
+ AVCodecContext * pCodecCtx = pFormatCtx->streams[videoStream]->codec;
+ LOGE("============= %d ========",__LINE__);
+ // Find the decoder for the video stream
+ AVCodec * pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
+ if(pCodec==NULL) {
+ LOGE("Codec not found.");
+ return -1; // Codec not found
+ }
+
+ if(avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
+ LOGE("Could not open codec.");
+ return -1; // Could not open codec
+ }
+
+ // 获取native window
+ ANativeWindow* nativeWindow = ANativeWindow_fromSurface(env, surface);
+
+ // 获取视频宽高
+ int videoWidth = pCodecCtx->width;
+ int videoHeight = pCodecCtx->height;
+
+ // 设置native window的buffer大小,可自动拉伸
+ ANativeWindow_setBuffersGeometry(nativeWindow, videoWidth, videoHeight, WINDOW_FORMAT_RGBA_8888);
+ ANativeWindow_Buffer windowBuffer;
+
+
+ LOGE("stream format：%s", pFormatCtx->iformat->name);
+ LOGE("duration ：%lld", (pFormatCtx->duration) / 1000000);
+ LOGE("Width, Height：%d x %d", pCodecCtx->width, pCodecCtx->height);
+ LOGE("Decoder name：%s", pCodec->name);
+
+ // Allocate video frame
+ AVFrame * pFrame = av_frame_alloc();
+
+ // 用于渲染
+ AVFrame * pFrameRGBA = av_frame_alloc();
+ if(pFrameRGBA == NULL || pFrame == NULL) {
+ LOGE("Could not allocate video frame.");
+ return -1;
+ }
+
+ // Determine required buffer size and allocate buffer
+ int numBytes=av_image_get_buffer_size(AV_PIX_FMT_RGBA, pCodecCtx->width, pCodecCtx->height, 1);
+ uint8_t * buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
+ av_image_fill_arrays(pFrameRGBA->data, pFrameRGBA->linesize, buffer, AV_PIX_FMT_RGBA,
+ pCodecCtx->width, pCodecCtx->height, 1);
+
+ // 由于解码出来的帧格式不是RGBA的,在渲染之前需要进行格式转换
+ struct SwsContext *sws_ctx = sws_getContext(pCodecCtx->width,
+ pCodecCtx->height,
+ pCodecCtx->pix_fmt,
+ pCodecCtx->width,
+ pCodecCtx->height,
+ AV_PIX_FMT_RGBA,
+ SWS_BILINEAR,
+ NULL,
+ NULL,
+ NULL);
+
+ int frameFinished;
+ AVPacket packet;
+ while(av_read_frame(pFormatCtx, &packet)>=0) {
+ // Is this a packet from the video stream?
+ if(packet.stream_index==videoStream) {
+
+ // Decode video frame
+ avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
+
+ // 并不是decode一次就可解码出一帧
+ if (frameFinished) {
+
+ // lock native window buffer
+ ANativeWindow_lock(nativeWindow, &windowBuffer, 0);
+
+ // 格式转换
+ sws_scale(sws_ctx, (uint8_t const * const *)pFrame->data,
+ pFrame->linesize, 0, pCodecCtx->height,
+ pFrameRGBA->data, pFrameRGBA->linesize);
+
+ // 获取stride
+ uint8_t * dst = (uint8_t*) windowBuffer.bits;
+ int dstStride = windowBuffer.stride * 4;
+ uint8_t * src = (uint8_t*) (pFrameRGBA->data[0]);
+ int srcStride = pFrameRGBA->linesize[0];
+
+ // 由于window的stride和帧的stride不同,因此需要逐行复制
+ int h;
+ for (h = 0; h < videoHeight; h++) {
+ memcpy(dst + h * dstStride, src + h * srcStride, srcStride);
+ }
+
+ ANativeWindow_unlockAndPost(nativeWindow);
+ }
+
+ }
+ av_packet_unref(&packet);
+ }
+
+ av_free(buffer);
+ av_free(pFrameRGBA);
+
+ // Free the YUV frame
+ av_free(pFrame);
+
+ // Close the codecs
+ avcodec_close(pCodecCtx);
+
+ // Close the video file
+ avformat_close_input(&pFormatCtx);
+
+ //env->ReleaseStringUTFChars(fname, file_name);
+ return 0;
}
\ No newline at end of file
projects / rtmpclient.git / blobdiff