Move midi_device.cpp into shared, as Futatabi is getting MIDI support soon.

[nageru] / nageru / ffmpeg_capture.h

diff --git a/nageru/ffmpeg_capture.h b/nageru/ffmpeg_capture.h
index 31e94ab41fefc103b150b5319877554450dfa720..a9a837115977348265115bb77ca0b59a935eecc9 100644 (file)
--- a/nageru/ffmpeg_capture.h
+++ b/nageru/ffmpeg_capture.h
@@ -17,6 +17,11 @@
 // changes parameters midway, which is allowed in some formats.
 //
 // You can get out the audio either as decoded or in raw form (Kaeru uses this).
+//
+// If there's a subtitle track, you can also get out the last subtitle at the
+// point of the frame. Note that once we get a video frame, we don't look for
+// subtitle, so if subtitles and a frame comes at the same time, you might not
+// see the subtitle until the next frame.
 
 #include <assert.h>
 #include <stdint.h>
@@ -31,7 +36,7 @@
 #include <movit/ycbcr.h>
 
 extern "C" {
-#include <libavresample/avresample.h>
+#include <libswresample/swresample.h>
 #include <libavutil/pixfmt.h>
 #include <libavutil/rational.h>
 #include <libavutil/samplefmt.h>
@@ -164,6 +169,18 @@ public:
                return current_frame_ycbcr_format;
        }
 
+       // Only valid to call during the frame callback.
+       std::string get_last_subtitle() const
+       {
+               return last_subtitle;
+       }
+
+       // Same.
+       bool get_has_last_subtitle() const
+       {
+               return has_last_subtitle;
+       }
+
        void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
        {
                dequeue_init_callback = init;
@@ -218,7 +235,7 @@ private:
 
        // Returns nullptr if no frame was decoded (e.g. EOF).
        AVFrameWithDeleter decode_frame(AVFormatContext *format_ctx, AVCodecContext *video_codec_ctx, AVCodecContext *audio_codec_ctx,
-                                       const std::string &pathname, int video_stream_index, int audio_stream_index,
+                                       const std::string &pathname, int video_stream_index, int audio_stream_index, int subtitle_stream_index,
                                        bmusb::FrameAllocator::Frame *audio_frame, bmusb::AudioFormat *audio_format, int64_t *audio_pts, bool *error);
        void convert_audio(const AVFrame *audio_avframe, bmusb::FrameAllocator::Frame *audio_frame, bmusb::AudioFormat *audio_format);
 
@@ -255,6 +272,7 @@ private:
        int sws_last_width = -1, sws_last_height = -1, sws_last_src_format = -1;
        AVPixelFormat sws_dst_format = AVPixelFormat(-1);  // In practice, always initialized.
        AVRational video_timebase, audio_timebase;
+       bool is_mjpeg = false;
 
        QuittableSleeper producer_thread_should_quit;
        std::thread producer_thread;
@@ -270,11 +288,14 @@ private:
        std::vector<QueuedCommand> command_queue;  // Protected by <queue_mu>.
 
        // Audio resampler.
-       AVAudioResampleContext *resampler = nullptr;
+       SwrContext *resampler = nullptr;
        AVSampleFormat last_src_format, last_dst_format;
        int64_t last_channel_layout;
        int last_sample_rate;
 
+       // Subtitles (no decoding done, really).
+       bool has_last_subtitle = false;
+       std::string last_subtitle;
 };
 
 #endif  // !defined(_FFMPEG_CAPTURE_H)