From e4155f15b35c4272a235f5521d2dc6c2aabdd462 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 9 Nov 2013 10:14:46 +0100
Subject: [PATCH] eamad: use the AVFrame API properly.

---
 libavcodec/eamad.c | 39 ++++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 17 deletions(-)

diff --git a/libavcodec/eamad.c b/libavcodec/eamad.c
index 5de28c72da..22070a45f7 100644
--- a/libavcodec/eamad.c
+++ b/libavcodec/eamad.c
@@ -45,7 +45,7 @@
 typedef struct MadContext {
     AVCodecContext *avctx;
     DSPContext dsp;
-    AVFrame last_frame;
+    AVFrame *last_frame;
     GetBitContext gb;
     void *bitstream_buf;
     unsigned int bitstream_buf_size;
@@ -65,6 +65,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
     ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
     ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
     ff_mpeg12_init_vlcs();
+
+    s->last_frame = av_frame_alloc();
+    if (!s->last_frame)
+        return AVERROR(ENOMEM);
+
     return 0;
 }
 
@@ -84,14 +89,14 @@ static inline void comp_block(MadContext *t, AVFrame *frame,
     if (j < 4) {
         comp(frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
              frame->linesize[0],
-             t->last_frame.data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x,
-             t->last_frame.linesize[0], add);
+             t->last_frame->data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame->linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x,
+             t->last_frame->linesize[0], add);
     } else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
         int index = j - 3;
         comp(frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x * 8,
              frame->linesize[index],
-             t->last_frame.data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2),
-             t->last_frame.linesize[index], add);
+             t->last_frame->data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame->linesize[index] + mb_x * 8 + (mv_x/2),
+             t->last_frame->linesize[index], add);
     }
 }
 
@@ -250,7 +255,7 @@ static int decode_frame(AVCodecContext *avctx,
     buf += 16;
 
     if (avctx->width != width || avctx->height != height) {
-        av_frame_unref(&s->last_frame);
+        av_frame_unref(s->last_frame);
         if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
             return ret;
     }
@@ -260,17 +265,17 @@ static int decode_frame(AVCodecContext *avctx,
         return ret;
     }
 
-    if (inter && !s->last_frame.data[0]) {
+    if (inter && !s->last_frame->data[0]) {
         av_log(avctx, AV_LOG_WARNING, "Missing reference frame.\n");
-        ret = ff_get_buffer(avctx, &s->last_frame, AV_GET_BUFFER_FLAG_REF);
+        ret = ff_get_buffer(avctx, s->last_frame, AV_GET_BUFFER_FLAG_REF);
         if (ret < 0)
             return ret;
-        memset(s->last_frame.data[0], 0, s->last_frame.height *
-               s->last_frame.linesize[0]);
-        memset(s->last_frame.data[1], 0x80, s->last_frame.height / 2 *
-               s->last_frame.linesize[1]);
-        memset(s->last_frame.data[2], 0x80, s->last_frame.height / 2 *
-               s->last_frame.linesize[2]);
+        memset(s->last_frame->data[0], 0, s->last_frame->height *
+               s->last_frame->linesize[0]);
+        memset(s->last_frame->data[1], 0x80, s->last_frame->height / 2 *
+               s->last_frame->linesize[1]);
+        memset(s->last_frame->data[2], 0x80, s->last_frame->height / 2 *
+               s->last_frame->linesize[2]);
     }
 
     av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size,
@@ -287,8 +292,8 @@ static int decode_frame(AVCodecContext *avctx,
     *got_frame = 1;
 
     if (chunk_type != MADe_TAG) {
-        av_frame_unref(&s->last_frame);
-        if ((ret = av_frame_ref(&s->last_frame, frame)) < 0)
+        av_frame_unref(s->last_frame);
+        if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
             return ret;
     }
 
@@ -298,7 +303,7 @@ static int decode_frame(AVCodecContext *avctx,
 static av_cold int decode_end(AVCodecContext *avctx)
 {
     MadContext *t = avctx->priv_data;
-    av_frame_unref(&t->last_frame);
+    av_frame_free(&t->last_frame);
     av_free(t->bitstream_buf);
     return 0;
 }