Add a Lua function to rewind the video.

[nageru] / ffmpeg_capture.cpp

diff --git a/ffmpeg_capture.cpp b/ffmpeg_capture.cpp
index 647b7cbea4b4a96e25b1496b66a0b2b5d476d335..bb41a35a4dc01b9909cb374967c65a0153216179 100644 (file)
--- a/ffmpeg_capture.cpp
+++ b/ffmpeg_capture.cpp
@@ -186,6 +186,22 @@ bool FFmpegCapture::play_video(const string &pathname)
 
        // Main loop.
        while (!producer_thread_should_quit) {
+               // Process any queued commands from other threads.
+               vector<QueuedCommand> commands;
+               {
+                       lock_guard<mutex> lock(queue_mu);
+                       swap(commands, command_queue);
+               }
+               for (const QueuedCommand &cmd : commands) {
+                       if (cmd.command == QueuedCommand::REWIND) {
+                               if (av_seek_frame(format_ctx.get(), /*stream_index=*/-1, /*timestamp=*/0, /*flags=*/0) < 0) {
+                                       fprintf(stderr, "%s: Rewind failed, stopping play.\n", pathname.c_str());
+                               }
+                               start = steady_clock::now();
+                               continue;
+                       }
+               }
+
                // Read packets until we have a frame or there are none left.
                int frame_finished = 0;
                AVFrameWithDeleter frame = av_frame_alloc_unique();