From f4a283eec49b116fa07498bb71249e0620ec0fff Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Sun, 23 Dec 2012 20:16:21 -0500
Subject: [PATCH] wmapro: decode directly to the user-provided AVFrame

---
 libavcodec/wmaprodec.c | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index b54484ea9d..e8b9df4e7d 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -169,7 +169,6 @@ typedef struct {
 typedef struct WMAProDecodeCtx {
     /* generic decoder variables */
     AVCodecContext*  avctx;                         ///< codec context for av_log
-    AVFrame          frame;                         ///< AVFrame for decoded output
     AVFloatDSPContext fdsp;
     uint8_t          frame_data[MAX_FRAMESIZE +
                       FF_INPUT_BUFFER_PADDING_SIZE];///< compressed frame data
@@ -461,9 +460,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     avctx->channel_layout = channel_mask;
 
-    avcodec_get_frame_defaults(&s->frame);
-    avctx->coded_frame = &s->frame;
-
     return 0;
 }
 
@@ -1293,7 +1289,7 @@ static int decode_subframe(WMAProDecodeCtx *s)
  *@return 0 if the trailer bit indicates that this is the last frame,
  *        1 if there are additional frames
  */
-static int decode_frame(WMAProDecodeCtx *s, int *got_frame_ptr)
+static int decode_frame(WMAProDecodeCtx *s, AVFrame *frame, int *got_frame_ptr)
 {
     AVCodecContext *avctx = s->avctx;
     GetBitContext* gb = &s->gb;
@@ -1366,8 +1362,8 @@ static int decode_frame(WMAProDecodeCtx *s, int *got_frame_ptr)
     }
 
     /* get output buffer */
-    s->frame.nb_samples = s->samples_per_frame;
-    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
+    frame->nb_samples = s->samples_per_frame;
+    if ((ret = ff_get_buffer(avctx, frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         s->packet_loss = 1;
         return 0;
@@ -1375,7 +1371,7 @@ static int decode_frame(WMAProDecodeCtx *s, int *got_frame_ptr)
 
     /** copy samples to the output buffer */
     for (i = 0; i < avctx->channels; i++)
-        memcpy(s->frame.extended_data[i], s->channel[i].out,
+        memcpy(frame->extended_data[i], s->channel[i].out,
                s->samples_per_frame * sizeof(*s->channel[i].out));
 
     for (i = 0; i < avctx->channels; i++) {
@@ -1543,7 +1539,7 @@ static int decode_packet(AVCodecContext *avctx, void *data,
 
             /** decode the cross packet frame if it is valid */
             if (!s->packet_loss)
-                decode_frame(s, got_frame_ptr);
+                decode_frame(s, data, got_frame_ptr);
         } else if (s->num_saved_bits - s->frame_offset) {
             av_dlog(avctx, "ignoring %x previously saved bits\n",
                     s->num_saved_bits - s->frame_offset);
@@ -1566,7 +1562,7 @@ static int decode_packet(AVCodecContext *avctx, void *data,
             (frame_size = show_bits(gb, s->log2_frame_size)) &&
             frame_size <= remaining_bits(s, gb)) {
             save_bits(s, gb, frame_size, 0);
-            s->packet_done = !decode_frame(s, got_frame_ptr);
+            s->packet_done = !decode_frame(s, data, got_frame_ptr);
         } else if (!s->len_prefix
                    && s->num_saved_bits > get_bits_count(&s->gb)) {
             /** when the frames do not have a length prefix, we don't know
@@ -1576,7 +1572,7 @@ static int decode_packet(AVCodecContext *avctx, void *data,
                 therefore we save the incoming packet first, then we append
                 the "previous frame" data from the next packet so that
                 we get a buffer that only contains full frames */
-            s->packet_done = !decode_frame(s, got_frame_ptr);
+            s->packet_done = !decode_frame(s, data, got_frame_ptr);
         } else
             s->packet_done = 1;
     }
@@ -1592,9 +1588,6 @@ static int decode_packet(AVCodecContext *avctx, void *data,
     if (s->packet_loss)
         return AVERROR_INVALIDDATA;
 
-    if (*got_frame_ptr)
-        *(AVFrame *)data = s->frame;
-
     return get_bits_count(gb) >> 3;
 }