ws-snd1: decode directly to the user-provided AVFrame

libavcodec/ws-snd1.c

@@ -41,28 +41,19 @@ static const int8_t ws_adpcm_4bit[] = {
      0,  1,  2,  3,  4,  5,  6,  8
 };
 
-typedef struct WSSndContext {
-    AVFrame frame;
-} WSSndContext;
-
 static av_cold int ws_snd_decode_init(AVCodecContext *avctx)
 {
-    WSSndContext *s = avctx->priv_data;
-
     avctx->channels       = 1;
     avctx->channel_layout = AV_CH_LAYOUT_MONO;
     avctx->sample_fmt     = AV_SAMPLE_FMT_U8;
 
-    avcodec_get_frame_defaults(&s->frame);
-    avctx->coded_frame = &s->frame;
-
     return 0;
 }
 
 static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame_ptr, AVPacket *avpkt)
 {
-    WSSndContext *s = avctx->priv_data;
+    AVFrame *frame     = data;
     const uint8_t *buf = avpkt->data;
     int buf_size       = avpkt->size;
 
@@ -89,18 +80,17 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
     }
 
     /* get output buffer */
-    s->frame.nb_samples = out_size;
-    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
+    frame->nb_samples = out_size;
+    if ((ret = ff_get_buffer(avctx, frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
-    samples     = s->frame.data[0];
+    samples     = frame->data[0];
     samples_end = samples + out_size;
 
     if (in_size == out_size) {
         memcpy(samples, buf, out_size);
-        *got_frame_ptr   = 1;
-        *(AVFrame *)data = s->frame;
+        *got_frame_ptr = 1;
         return buf_size;
     }
 
@@ -176,9 +166,8 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
         }
     }
 
-    s->frame.nb_samples = samples - s->frame.data[0];
-    *got_frame_ptr   = 1;
-    *(AVFrame *)data = s->frame;
+    frame->nb_samples = samples - frame->data[0];
+    *got_frame_ptr    = 1;
 
     return buf_size;
 }
@@ -187,7 +176,6 @@ AVCodec ff_ws_snd1_decoder = {
     .name           = "ws_snd1",
     .type           = AVMEDIA_TYPE_AUDIO,
     .id             = AV_CODEC_ID_WESTWOOD_SND1,
-    .priv_data_size = sizeof(WSSndContext),
     .init           = ws_snd_decode_init,
     .decode         = ws_snd_decode_frame,
     .capabilities   = CODEC_CAP_DR1,