avcodec: add AVHWAccel.flush callback

libavcodec/av1dec.c

@@ -1452,6 +1452,9 @@ static void av1_decode_flush(AVCodecContext *avctx)
 
     ff_cbs_fragment_reset(&s->current_obu);
     ff_cbs_flush(s->cbc);
+
+    if (avctx->hwaccel && avctx->hwaccel->flush)
+        avctx->hwaccel->flush(avctx);
 }
 
 #define OFFSET(x) offsetof(AV1DecContext, x)

libavcodec/avcodec.h

@@ -2267,6 +2267,11 @@ typedef struct AVHWAccel {
      * @param data the per-frame hardware accelerator private data to be freed.
      */
     void (*free_frame_priv)(void *hwctx, uint8_t *data);
+
+    /**
+     * Callback to flush the hwaccel state.
+     */
+    void (*flush)(AVCodecContext *avctx);
 } AVHWAccel;
 
 /**

libavcodec/h264dec.c

@@ -484,6 +484,9 @@ static void h264_decode_flush(AVCodecContext *avctx)
 
     ff_h264_free_tables(h);
     h->context_initialized = 0;
+
+    if (avctx->hwaccel && avctx->hwaccel->flush)
+        avctx->hwaccel->flush(avctx);
 }
 
 static int get_last_needed_nal(H264Context *h)

libavcodec/hevcdec.c

@@ -3708,6 +3708,9 @@ static void hevc_decode_flush(AVCodecContext *avctx)
     av_buffer_unref(&s->rpu_buf);
     s->max_ra = INT_MAX;
     s->eos = 1;
+
+    if (avctx->hwaccel && avctx->hwaccel->flush)
+        avctx->hwaccel->flush(avctx);
 }
 
 #define OFFSET(x) offsetof(HEVCContext, x)

libavcodec/vp8.c

@@ -167,6 +167,9 @@ static void vp8_decode_flush_impl(AVCodecContext *avctx, int free_mem)
 
     if (free_mem)
         free_buffers(s);
+
+    if (avctx->hwaccel && avctx->hwaccel->flush)
+        avctx->hwaccel->flush(avctx);
 }
 
 static void vp8_decode_flush(AVCodecContext *avctx)

libavcodec/vp9.c

@@ -1801,6 +1801,9 @@ static void vp9_decode_flush(AVCodecContext *avctx)
         vp9_frame_unref(avctx, &s->s.frames[i]);
     for (i = 0; i < 8; i++)
         ff_thread_release_ext_buffer(avctx, &s->s.refs[i]);
+
+    if (avctx->hwaccel && avctx->hwaccel->flush)
+        avctx->hwaccel->flush(avctx);
 }
 
 static av_cold int vp9_decode_init(AVCodecContext *avctx)