ffplay: factorize thread starting and stopping code into decoder

Signed-off-by: Marton Balint <cus@passwd.hu>

ffplay.c

@@ -191,12 +191,11 @@ typedef struct Decoder {
     AVRational start_pts_tb;
     int64_t next_pts;
     AVRational next_pts_tb;
+    SDL_Thread *decoder_tid;
 } Decoder;
 
 typedef struct VideoState {
     SDL_Thread *read_tid;
-    SDL_Thread *video_tid;
-    SDL_Thread *audio_tid;
     AVInputFormat *iformat;
     int abort_request;
     int force_refresh;
@@ -264,7 +263,6 @@ typedef struct VideoState {
     int xpos;
     double last_vis_time;
 
-    SDL_Thread *subtitle_tid;
     int subtitle_stream;
     AVStream *subtitle_st;
     PacketQueue subtitleq;
@@ -769,6 +767,15 @@ static int64_t frame_queue_last_pos(FrameQueue *f)
         return -1;
 }
 
+static void decoder_abort(Decoder *d, FrameQueue *fq)
+{
+    packet_queue_abort(d->queue);
+    frame_queue_signal(fq);
+    SDL_WaitThread(d->decoder_tid, NULL);
+    d->decoder_tid = NULL;
+    packet_queue_flush(d->queue);
+}
+
 static inline void fill_rectangle(SDL_Surface *screen,
                                   int x, int y, int w, int h, int color, int update)
 {
@@ -2197,6 +2204,12 @@ static int audio_thread(void *arg)
     return ret;
 }
 
+static void decoder_start(Decoder *d, int (*fn)(void *), void *arg)
+{
+    packet_queue_start(d->queue);
+    d->decoder_tid = SDL_CreateThread(fn, arg);
+}
+
 static int video_thread(void *arg)
 {
     VideoState *is = arg;
@@ -2731,31 +2744,28 @@ static int stream_component_open(VideoState *is, int stream_index)
         is->audio_stream = stream_index;
         is->audio_st = ic->streams[stream_index];
 
-        packet_queue_start(&is->audioq);
         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
             is->auddec.start_pts = is->audio_st->start_time;
             is->auddec.start_pts_tb = is->audio_st->time_base;
         }
-        is->audio_tid = SDL_CreateThread(audio_thread, is);
+        decoder_start(&is->auddec, audio_thread, is);
         SDL_PauseAudio(0);
         break;
     case AVMEDIA_TYPE_VIDEO:
         is->video_stream = stream_index;
         is->video_st = ic->streams[stream_index];
 
-        packet_queue_start(&is->videoq);
         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
-        is->video_tid = SDL_CreateThread(video_thread, is);
+        decoder_start(&is->viddec, video_thread, is);
         is->queue_attachments_req = 1;
         break;
     case AVMEDIA_TYPE_SUBTITLE:
         is->subtitle_stream = stream_index;
         is->subtitle_st = ic->streams[stream_index];
 
-        packet_queue_start(&is->subtitleq);
         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
-        is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
+        decoder_start(&is->subdec, subtitle_thread, is);
         break;
     default:
         break;
@@ -2778,13 +2788,9 @@ static void stream_component_close(VideoState *is, int stream_index)
 
     switch (avctx->codec_type) {
     case AVMEDIA_TYPE_AUDIO:
-        packet_queue_abort(&is->audioq);
-        frame_queue_signal(&is->sampq);
+        decoder_abort(&is->auddec, &is->sampq);
         SDL_CloseAudio();
-        SDL_WaitThread(is->audio_tid, NULL);
-
         decoder_destroy(&is->auddec);
-        packet_queue_flush(&is->audioq);
         swr_free(&is->swr_ctx);
         av_freep(&is->audio_buf1);
         is->audio_buf1_size = 0;
@@ -2798,28 +2804,12 @@ static void stream_component_close(VideoState *is, int stream_index)
         }
         break;
     case AVMEDIA_TYPE_VIDEO:
-        packet_queue_abort(&is->videoq);
-
-        /* note: we also signal this mutex to make sure we deblock the
-           video thread in all cases */
-        frame_queue_signal(&is->pictq);
-
-        SDL_WaitThread(is->video_tid, NULL);
-
+        decoder_abort(&is->viddec, &is->pictq);
         decoder_destroy(&is->viddec);
-        packet_queue_flush(&is->videoq);
         break;
     case AVMEDIA_TYPE_SUBTITLE:
-        packet_queue_abort(&is->subtitleq);
-
-        /* note: we also signal this mutex to make sure we deblock the
-           video thread in all cases */
-        frame_queue_signal(&is->subpq);
-
-        SDL_WaitThread(is->subtitle_tid, NULL);
-
+        decoder_abort(&is->subdec, &is->subpq);
         decoder_destroy(&is->subdec);
-        packet_queue_flush(&is->subtitleq);
         break;
     default:
         break;