translate the note pusher into English

translate the note pusher into English

app/src/main/cpp/ffmpeg_pusher.cpp

@@ -34,37 +34,30 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
     LOGE(TAG, "file_path=%s", file_path);
     LOGE(TAG, "live_url=%s", live_url);
 
-        //注册所有组件
     av_register_all();
-        //初始化网络
     avformat_network_init();
-        //打开输入文件
     if ((ret = avformat_open_input(&in_format, file_path, 0, 0)) < 0) {
         LOGE(TAG, "could not open input file...");
         goto end;
     }
-        //寻找流信息
     if ((ret = avformat_find_stream_info(in_format, 0)) < 0) {
         LOGE(TAG, "could not find stream info...");
         goto end;
     }
-        //
     for (i = 0; i < in_format->nb_streams; i++) {
-            //找到视频流
         if (in_format->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
             video_index = i;
             break;
         }
     }
     av_dump_format(in_format, 0, file_path, 0);
-        //分配输出封装格式上下文， rtmp协议支持格式为flv
     avformat_alloc_output_context2(&out_format, NULL, "flv", live_url);
     if (!out_format) {
         LOGE(TAG, "could not alloc output context...");
         ret = AVERROR_UNKNOWN;
         goto end;
     }
-        //根据输入流来创建输出流
+    //Create output stream according to input stream
     for (i = 0; i < in_format->nb_streams; i++) {
         AVStream *in_stream = in_format->streams[i];
         AVStream *out_stream = avformat_new_stream(out_format, in_stream->codec->codec);
@@ -73,7 +66,7 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
             ret = AVERROR_UNKNOWN;
             goto end;
         }
-            //复制封装格式上下文
+        //Copy context
         ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
         if (ret < 0) {
             LOGE(TAG, "could not copy context...");
@@ -84,9 +77,7 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
             out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
         }
     }
-        //封装格式
     output_format = out_format->oformat;
-        //打开输出文件/URL
     if (!(output_format->flags & AVFMT_NOFILE)) {
         ret = avio_open(&out_format->pb, live_url, AVIO_FLAG_WRITE);
         if (ret < 0) {
@@ -94,15 +85,13 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
             goto end;
         }
     }
-        //写文件头
+    //Write header
     ret = avformat_write_header(out_format, NULL);
     if (ret < 0) {
         LOGE(TAG, "could not write header...");
         goto end;
     }
-        //获取开始时间
     start_time = av_gettime();
-        //开始循环读一帧数据
     while (1) {
         AVStream *in_stream, *out_stream;
         ret = av_read_frame(in_format, &packet);
@@ -112,18 +101,19 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
         //计算帧间隔，参考时钟/采样率
         if (packet.pts == AV_NOPTS_VALUE) {
             AVRational time_base = in_format->streams[video_index]->time_base;
-                int64_t cal_duration = (int64_t)(AV_TIME_BASE/av_q2d(in_format->streams[video_index]->r_frame_rate));
-                packet.pts = (int64_t)((frame_index * cal_duration)/(av_q2d(time_base) * AV_TIME_BASE));
+            int64_t cal_duration = (int64_t) (AV_TIME_BASE /
+                                              av_q2d(in_format->streams[video_index]->r_frame_rate));
+            packet.pts = (int64_t) ((frame_index * cal_duration) /
+                                    (av_q2d(time_base) * AV_TIME_BASE));
             packet.dts = packet.pts;
             packet.duration = (int64_t) (cal_duration / (av_q2d(time_base) * AV_TIME_BASE));
         }
-            //视频帧之间延时
         if (packet.stream_index == video_index) {
             AVRational time_base = in_format->streams[video_index]->time_base;
             AVRational time_base_q = {1, AV_TIME_BASE};
             int64_t pts_time = av_rescale_q(packet.dts, time_base, time_base_q);
             int64_t now_time = av_gettime() - start_time;
-                //延时以保持同步
+            //sleep to keep waiting
             if (pts_time > now_time) {
                 av_usleep((unsigned int) (pts_time - now_time));
             }
@@ -131,29 +121,29 @@ PUSHER_FUNC(jint, pushStream, jstring filePath, jstring liveUrl) {
         in_stream = in_format->streams[packet.stream_index];
         out_stream = out_format->streams[packet.stream_index];
 
-            //pts/dts转换
+        //pts to dts
         packet.pts = av_rescale_q_rnd(packet.pts, in_stream->time_base, out_stream->time_base,
                                       (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
         packet.dts = av_rescale_q_rnd(packet.dts, in_stream->time_base, out_stream->time_base,
                                       (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
-            packet.duration = av_rescale_q(packet.duration, in_stream->time_base, out_stream->time_base);
+        packet.duration = av_rescale_q(packet.duration, in_stream->time_base,
+                                       out_stream->time_base);
         packet.pos = -1;
 
-            //视频帧计数
         if (packet.stream_index == video_index) {
             frame_index++;
             LOGI(TAG, "write frame = %d", frame_index);
         }
-            //写一帧数据
+        //Write a frame
         ret = av_interleaved_write_frame(out_format, &packet);
         if (ret < 0) {
             LOGE(TAG, "could not write frame...");
             break;
         }
-            //释放包数据内存
+        //Release packet
         av_packet_unref(&packet);
     }
-        //写文件尾
+    //Write tail
     av_write_trailer(out_format);
 
     end: