avcodec: Introduce ff_get_buffer

Validate the image size there as is done in the other release
branches.

Bug-Id: CVE-2011-3935
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

69 files changed, 148 insertions, 80 deletions

diff --git a/libavcodec/8svx.c b/libavcodec/8svx.c
index 4f11b8bec4..1057a72db9 100644
--- a/libavcodec/8svx.c
+++ b/libavcodec/8svx.c
@@ -29,6 +29,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 
 /** decoder context */
 typedef struct EightSvxContext {
@@ -141,7 +142,7 @@ static int eightsvx_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     esc->frame.nb_samples = buf_size * (is_compr + 1);
-    if ((ret = avctx->get_buffer(avctx, &esc->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &esc->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 83dd06bfc0..9c4489434a 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -2246,7 +2246,7 @@ static int aac_decode_frame_int(AVCodecContext *avctx, void *data,
     if (samples) {
         /* get output buffer */
         ac->frame.nb_samples = samples;
-        if ((err = avctx->get_buffer(avctx, &ac->frame)) < 0) {
+        if ((err = ff_get_buffer(avctx, &ac->frame)) < 0) {
             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
             return err;
         }
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 039062b3d6..a3c581909b 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -1411,7 +1411,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = s->num_blocks * 256;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 5f7f140a9d..fe4949d7af 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "put_bits.h"
 #include "bytestream.h"
@@ -547,7 +548,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = nb_samples;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/adxdec.c b/libavcodec/adxdec.c
index 3f7f5f4ca1..de2d718b1c 100644
--- a/libavcodec/adxdec.c
+++ b/libavcodec/adxdec.c
@@ -21,6 +21,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "adx.h"
 #include "get_bits.h"
 
@@ -140,7 +141,7 @@ static int adx_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = num_blocks * BLOCK_SAMPLES;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/alac.c b/libavcodec/alac.c
index 23b8951169..c162e2f60e 100644
--- a/libavcodec/alac.c
+++ b/libavcodec/alac.c
@@ -47,6 +47,7 @@
 
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "bytestream.h"
 #include "unary.h"
@@ -402,7 +403,7 @@ static int alac_decode_frame(AVCodecContext *avctx, void *data,
         return AVERROR_INVALIDDATA;
     }
     alac->frame.nb_samples = outputsamples;
-    if ((ret = avctx->get_buffer(avctx, &alac->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &alac->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 7daa545765..c49552de59 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -30,6 +30,7 @@
 
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "unary.h"
 #include "mpeg4audio.h"
@@ -1484,7 +1485,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
 
     /* get output buffer */
     ctx->frame.nb_samples = ctx->cur_frame_length;
-    if ((ret = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ctx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/amrnbdec.c b/libavcodec/amrnbdec.c
index a7d0b4e337..d294fe967f 100644
--- a/libavcodec/amrnbdec.c
+++ b/libavcodec/amrnbdec.c
@@ -44,6 +44,7 @@
 #include <math.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "libavutil/common.h"
 #include "celp_math.h"
@@ -944,7 +945,7 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     p->avframe.nb_samples = AMR_BLOCK_SIZE;
-    if ((ret = avctx->get_buffer(avctx, &p->avframe)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &p->avframe)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/amrwbdec.c b/libavcodec/amrwbdec.c
index b9ae9ece66..893cd355e5 100644
--- a/libavcodec/amrwbdec.c
+++ b/libavcodec/amrwbdec.c
@@ -27,6 +27,7 @@
 #include "libavutil/lfg.h"
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "lsp.h"
 #include "celp_math.h"
@@ -1087,7 +1088,7 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     ctx->avframe.nb_samples = 4 * AMRWB_SFR_SIZE_16k;
-    if ((ret = avctx->get_buffer(avctx, &ctx->avframe)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ctx->avframe)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/ansi.c b/libavcodec/ansi.c
index 32c7ce4ecd..3721bca1e8 100644
--- a/libavcodec/ansi.c
+++ b/libavcodec/ansi.c
@@ -26,6 +26,7 @@
 
 #include "libavutil/lfg.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "cga_data.h"
 
 #define ATTR_BOLD         0x01  /**< Bold/Bright-foreground (mode 1) */
@@ -221,7 +222,7 @@ static int execute_code(AVCodecContext * avctx, int c)
             if (s->frame.data[0])
                 avctx->release_buffer(avctx, &s->frame);
             avcodec_set_dimensions(avctx, width, height);
-            ret = avctx->get_buffer(avctx, &s->frame);
+            ret = ff_get_buffer(avctx, &s->frame);
             if (ret < 0) {
                 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                 return ret;
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 745b14c1be..a9c3be492f 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -22,6 +22,7 @@
 
 #define BITSTREAM_READER_LE
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "get_bits.h"
 #include "bytestream.h"
@@ -887,7 +888,7 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = blockstodecode;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/atrac1.c b/libavcodec/atrac1.c
index 9ead80d5c8..128a66d0e7 100644
--- a/libavcodec/atrac1.c
+++ b/libavcodec/atrac1.c
@@ -33,6 +33,7 @@
 #include <stdio.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "fft.h"
@@ -291,7 +292,7 @@ static int atrac1_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     q->frame.nb_samples = AT1_SU_SAMPLES;
-    if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &q->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c
index e31dd1dcd5..5bfd038abd 100644
--- a/libavcodec/atrac3.c
+++ b/libavcodec/atrac3.c
@@ -37,6 +37,7 @@
 #include <stdio.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "bytestream.h"
@@ -852,7 +853,7 @@ static int atrac3_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     q->frame.nb_samples = SAMPLES_PER_FRAME;
-    if ((result = avctx->get_buffer(avctx, &q->frame)) < 0) {
+    if ((result = ff_get_buffer(avctx, &q->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return result;
     }
diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index d73ffcdabc..dc1028fbad 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -29,6 +29,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #define BITSTREAM_READER_LE
 #include "get_bits.h"
 #include "dsputil.h"
@@ -340,7 +341,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = s->block_size / avctx->channels;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/bmv.c b/libavcodec/bmv.c
index 920e75255f..c0fe9b87d8 100644
--- a/libavcodec/bmv.c
+++ b/libavcodec/bmv.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 enum BMVFlags{
@@ -265,7 +266,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
     avctx->pix_fmt = PIX_FMT_PAL8;
 
     c->pic.reference = 1;
-    if (avctx->get_buffer(avctx, &c->pic) < 0) {
+    if (ff_get_buffer(avctx, &c->pic) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return -1;
     }
@@ -330,7 +331,7 @@ static int bmv_aud_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = total_blocks * 32;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/cdgraphics.c b/libavcodec/cdgraphics.c
index 9ab00b4fac..f642287782 100644
--- a/libavcodec/cdgraphics.c
+++ b/libavcodec/cdgraphics.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 /**
@@ -331,7 +332,7 @@ static int cdg_decode_frame(AVCodecContext *avctx,
             }
 
             cdg_init_frame(&new_frame);
-            ret = avctx->get_buffer(avctx, &new_frame);
+            ret = ff_get_buffer(avctx, &new_frame);
             if (ret) {
                 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                 return ret;
diff --git a/libavcodec/cook.c b/libavcodec/cook.c
index 74378521b3..df4fee5967 100644
--- a/libavcodec/cook.c
+++ b/libavcodec/cook.c
@@ -44,6 +44,7 @@
 
 #include "libavutil/lfg.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "bytestream.h"
@@ -991,7 +992,7 @@ static int cook_decode_frame(AVCodecContext *avctx, void *data,
     /* get output buffer */
     if (q->discarded_packets >= 2) {
         q->frame.nb_samples = q->samples_per_channel;
-        if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) {
+        if ((ret = ff_get_buffer(avctx, &q->frame)) < 0) {
             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
             return ret;
         }
diff --git a/libavcodec/dca.c b/libavcodec/dca.c
index 4d71812d88..72b7bbf7f1 100644
--- a/libavcodec/dca.c
+++ b/libavcodec/dca.c
@@ -32,6 +32,7 @@
 #include "libavutil/mathematics.h"
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "fft.h"
 #include "get_bits.h"
@@ -1902,7 +1903,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = 256 * (s->sample_blocks / 8);
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 0ae89a8985..d9ff44545e 100644
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -21,6 +21,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 #include "libavutil/imgutils.h"
@@ -325,7 +326,7 @@ static int dfa_decode_frame(AVCodecContext *avctx,
     if (s->pic.data[0])
         avctx->release_buffer(avctx, &s->pic);
 
-    if ((ret = avctx->get_buffer(avctx, &s->pic))) {
+    if ((ret = ff_get_buffer(avctx, &s->pic))) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/dpcm.c b/libavcodec/dpcm.c
index 7f5dbfe3b9..f4aaa95c0a 100644
--- a/libavcodec/dpcm.c
+++ b/libavcodec/dpcm.c
@@ -39,6 +39,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 typedef struct DPCMContext {
@@ -213,7 +214,7 @@ static int dpcm_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = out / s->channels;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index 1a3366814b..99eea8ab33 100644
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -25,6 +25,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 #include "mathops.h"
 
@@ -362,7 +363,7 @@ static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
-    if ((ret = avctx->get_buffer(avctx, &cin->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &cin->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/dxtory.c b/libavcodec/dxtory.c
index 5f67fbdbef..f8ebb43b63 100644
--- a/libavcodec/dxtory.c
+++ b/libavcodec/dxtory.c
@@ -21,6 +21,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "libavutil/intreadwrite.h"
 
 static av_cold int decode_init(AVCodecContext *avctx)
@@ -51,7 +52,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     }
 
     pic->reference = 0;
-    if ((ret = avctx->get_buffer(avctx, pic)) < 0)
+    if ((ret = ff_get_buffer(avctx, pic)) < 0)
         return ret;
 
     pic->pict_type = AV_PICTURE_TYPE_I;
diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c
index 440a55d3e9..f20dc3d9b7 100644
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@@ -599,7 +599,7 @@ static int flac_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = s->blocksize;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/g722dec.c b/libavcodec/g722dec.c
index 72bb0ef3c7..9e0a2870b2 100644
--- a/libavcodec/g722dec.c
+++ b/libavcodec/g722dec.c
@@ -35,6 +35,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "g722.h"
 #include "libavutil/opt.h"
@@ -96,7 +97,7 @@ static int g722_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = avpkt->size * 2;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index 85711f854c..81aa7d0927 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -448,7 +448,7 @@ static int g726_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = out_samples;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/gsmdec.c b/libavcodec/gsmdec.c
index 97b6fe8492..6fdf9fbf61 100644
--- a/libavcodec/gsmdec.c
+++ b/libavcodec/gsmdec.c
@@ -25,6 +25,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "msgsmdec.h"
 
@@ -72,7 +73,7 @@ static int gsm_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = avctx->frame_size;
-    if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     }
diff --git a/libavcodec/iff.c b/libavcodec/iff.c
index b931e40213..4565724a8a 100644
--- a/libavcodec/iff.c
+++ b/libavcodec/iff.c
@@ -28,6 +28,7 @@
 #include "libavutil/imgutils.h"
 #include "bytestream.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 
 typedef struct {
@@ -260,7 +261,7 @@ static int decode_frame_ilbm(AVCodecContext *avctx,
             av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
             return res;
         }
-    } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    } else if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
@@ -317,7 +318,7 @@ static int decode_frame_byterun1(AVCodecContext *avctx,
             av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
             return res;
         }
-    } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    } else if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index bee38b07f8..44bef9a13a 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -36,6 +36,7 @@
 #include <stdio.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "fft.h"
@@ -680,7 +681,7 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     q->frame.nb_samples = COEFFS;
-    if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &q->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/indeo3.c b/libavcodec/indeo3.c
index 9e90fb1c5a..c0957f0e3c 100644
--- a/libavcodec/indeo3.c
+++ b/libavcodec/indeo3.c
@@ -32,6 +32,7 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "bytestream.h"
 #include "get_bits.h"
@@ -1095,7 +1096,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         avctx->release_buffer(avctx, &ctx->frame);
 
     ctx->frame.reference = 0;
-    if ((res = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+    if ((res = ff_get_buffer(avctx, &ctx->frame)) < 0) {
         av_log(ctx->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     }
diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 441430e41c..66940a8da5 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -126,4 +126,7 @@ int avpriv_unlock_avformat(void);
  */
 int ff_alloc_packet(AVPacket *avpkt, int size);
 
+
+int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame);
+
 #endif /* AVCODEC_INTERNAL_H */
diff --git a/libavcodec/ivi_common.c b/libavcodec/ivi_common.c
index 84695a058b..25390018ad 100644
--- a/libavcodec/ivi_common.c
+++ b/libavcodec/ivi_common.c
@@ -28,6 +28,7 @@
 
 #define BITSTREAM_READER_LE
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "ivi_common.h"
 #include "libavutil/common.h"
@@ -940,7 +941,7 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
 
     ctx->frame.reference = 0;
     avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);
-    if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+    if ((result = ff_get_buffer(avctx, &ctx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return result;
     }
diff --git a/libavcodec/kgv1dec.c b/libavcodec/kgv1dec.c
index 42bbcae530..21f30803da 100644
--- a/libavcodec/kgv1dec.c
+++ b/libavcodec/kgv1dec.c
@@ -27,6 +27,7 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/imgutils.h"
 #include "avcodec.h"
+#include "internal.h"
 
 typedef struct {
     AVCodecContext *avctx;
@@ -70,7 +71,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
     maxcnt = w * h;
 
     c->cur.reference = 3;
-    if ((res = avctx->get_buffer(avctx, &c->cur)) < 0)
+    if ((res = ff_get_buffer(avctx, &c->cur)) < 0)
         return res;
     out  = (uint16_t *) c->cur.data[0];
     if (c->prev.data[0]) {
diff --git a/libavcodec/libgsm.c b/libavcodec/libgsm.c
index 1fa04cf9d9..1098bce631 100644
--- a/libavcodec/libgsm.c
+++ b/libavcodec/libgsm.c
@@ -188,7 +188,7 @@ static int libgsm_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = avctx->frame_size;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/libopencore-amr.c b/libavcodec/libopencore-amr.c
index ded92179d3..8265848155 100644
--- a/libavcodec/libopencore-amr.c
+++ b/libavcodec/libopencore-amr.c
@@ -143,7 +143,7 @@ static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = 160;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
@@ -295,7 +295,7 @@ static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = 320;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/libspeexdec.c b/libavcodec/libspeexdec.c
index eba2f16949..0ce09f4be7 100644
--- a/libavcodec/libspeexdec.c
+++ b/libavcodec/libspeexdec.c
@@ -108,7 +108,7 @@ static int libspeex_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = s->frame_size;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/mace.c b/libavcodec/mace.c
index d02b1dc095..2d2f3767a1 100644
--- a/libavcodec/mace.c
+++ b/libavcodec/mace.c
@@ -25,6 +25,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 
 /*
  * Adapted to libavcodec by Francois Revol <revol@free.fr>
@@ -253,7 +254,7 @@ static int mace_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     ctx->frame.nb_samples = 3 * (buf_size << (1 - is_mace3)) / avctx->channels;
-    if ((ret = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ctx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index e74b20269a..6f6701fa10 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -27,6 +27,7 @@
 #include <stdint.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "libavutil/intreadwrite.h"
 #include "get_bits.h"
@@ -932,7 +933,7 @@ static int output_data(MLPDecodeContext *m, unsigned int substr,
 
     /* get output buffer */
     m->frame.nb_samples = s->blockpos;
-    if ((ret = avctx->get_buffer(avctx, &m->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &m->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/mpc7.c b/libavcodec/mpc7.c
index b678afd1a2..443c78b40f 100644
--- a/libavcodec/mpc7.c
+++ b/libavcodec/mpc7.c
@@ -27,6 +27,7 @@
 
 #include "libavutil/lfg.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "mpegaudiodsp.h"
@@ -218,7 +219,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = buf[1] ? c->lastframelen : MPC_FRAME_SIZE;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/mpc8.c b/libavcodec/mpc8.c
index f5eb4d6651..5dadbefafb 100644
--- a/libavcodec/mpc8.c
+++ b/libavcodec/mpc8.c
@@ -27,6 +27,7 @@
 
 #include "libavutil/lfg.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "mpegaudiodsp.h"
@@ -250,7 +251,7 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = MPC_FRAME_SIZE;
-    if ((res = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((res = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     }
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index e2216f3fdb..ee67f12464 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -26,6 +26,7 @@
 
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "mathops.h"
 #include "mpegaudiodsp.h"
@@ -1604,7 +1605,7 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT *samples,
     /* get output buffer */
     if (!samples) {
         s->frame.nb_samples = s->avctx->frame_size;
-        if ((ret = s->avctx->get_buffer(s->avctx, &s->frame)) < 0) {
+        if ((ret = ff_get_buffer(s->avctx, &s->frame)) < 0) {
             av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
             return ret;
         }
@@ -1910,7 +1911,7 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame->nb_samples = MPA_FRAME_SIZE;
-    if ((ret = avctx->get_buffer(avctx, s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/mxpegdec.c b/libavcodec/mxpegdec.c
index 6f0d0457f7..fff5c7eef9 100644
--- a/libavcodec/mxpegdec.c
+++ b/libavcodec/mxpegdec.c
@@ -249,7 +249,7 @@ static int mxpeg_decode_frame(AVCodecContext *avctx,
                     /* use stored SOF data to allocate current picture */
                     if (jpg->picture_ptr->data[0])
                         avctx->release_buffer(avctx, jpg->picture_ptr);
-                    if (avctx->get_buffer(avctx, jpg->picture_ptr) < 0) {
+                    if (ff_get_buffer(avctx, jpg->picture_ptr) < 0) {
                         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                         return AVERROR(ENOMEM);
                     }
@@ -268,7 +268,7 @@ static int mxpeg_decode_frame(AVCodecContext *avctx,
 
                     /* allocate dummy reference picture if needed */
                     if (!reference_ptr->data[0] &&
-                        avctx->get_buffer(avctx, reference_ptr) < 0) {
+                        ff_get_buffer(avctx, reference_ptr) < 0) {
                         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                         return AVERROR(ENOMEM);
                     }
diff --git a/libavcodec/nellymoserdec.c b/libavcodec/nellymoserdec.c
index 69c1b86f5e..1bc2b5422d 100644
--- a/libavcodec/nellymoserdec.c
+++ b/libavcodec/nellymoserdec.c
@@ -36,6 +36,7 @@
 #include "libavutil/random_seed.h"
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "fft.h"
 #include "fmtconvert.h"
@@ -179,7 +180,7 @@ static int decode_tag(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = NELLY_SAMPLES * blocks;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/pcm-mpeg.c b/libavcodec/pcm-mpeg.c
index f010b970bf..0d0eba189b 100644
--- a/libavcodec/pcm-mpeg.c
+++ b/libavcodec/pcm-mpeg.c
@@ -26,6 +26,7 @@
 
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 /*
@@ -161,7 +162,7 @@ static int pcm_bluray_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = samples;
-    if ((retval = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((retval = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return retval;
     }
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c
index cd44d77000..23a03c45ad 100644
--- a/libavcodec/pcm.c
+++ b/libavcodec/pcm.c
@@ -302,7 +302,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = n * samples_per_block / avctx->channels;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 65c6e2fbe3..345456ce6e 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -573,7 +573,7 @@ static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
                 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
 
             if (p->state == STATE_GET_BUFFER) {
-                p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
+                p->result = p-ff_get_buffer(p->avctx, p->requested_frame);
                 p->state  = STATE_SETTING_UP;
                 pthread_cond_signal(&p->progress_cond);
             }
@@ -919,7 +919,7 @@ int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
 
     if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
         f->thread_opaque = NULL;
-        return avctx->get_buffer(avctx, f);
+        return ff_get_buffer(avctx, f);
     }
 
     if (p->state != STATE_SETTING_UP &&
@@ -941,7 +941,7 @@ int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
 
     if (avctx->thread_safe_callbacks ||
         avctx->get_buffer == avcodec_default_get_buffer) {
-        err = avctx->get_buffer(avctx, f);
+        err = ff_get_buffer(avctx, f);
     } else {
         p->requested_frame = f;
         p->state = STATE_GET_BUFFER;
diff --git a/libavcodec/qcelpdec.c b/libavcodec/qcelpdec.c
index a3af2378f3..3d7420b9f2 100644
--- a/libavcodec/qcelpdec.c
+++ b/libavcodec/qcelpdec.c
@@ -697,7 +697,7 @@ static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     q->avframe.nb_samples = 160;
-    if ((ret = avctx->get_buffer(avctx, &q->avframe)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &q->avframe)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c
index 6b11b46d98..936c911d1a 100644
--- a/libavcodec/qdm2.c
+++ b/libavcodec/qdm2.c
@@ -37,6 +37,7 @@
 
 #define BITSTREAM_READER_LE
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "rdft.h"
@@ -2003,7 +2004,7 @@ static int qdm2_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = 16 * s->frame_size;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/ra144dec.c b/libavcodec/ra144dec.c
index dd8838c417..86c7eedd9c 100644
--- a/libavcodec/ra144dec.c
+++ b/libavcodec/ra144dec.c
@@ -24,6 +24,7 @@
 
 #include "libavutil/intmath.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "ra144.h"
 
@@ -77,7 +78,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     ractx->frame.nb_samples = NBLOCKS * BLOCKSIZE;
-    if ((ret = avctx->get_buffer(avctx, &ractx->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ractx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c
index 4cb2493fc9..0d10545faa 100644
--- a/libavcodec/ra288.c
+++ b/libavcodec/ra288.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #define BITSTREAM_READER_LE
 #include "get_bits.h"
 #include "ra288.h"
@@ -188,7 +189,7 @@ static int ra288_decode_frame(AVCodecContext * avctx, void *data,
 
     /* get output buffer */
     ractx->frame.nb_samples = RA288_BLOCK_SIZE * RA288_BLOCKS_PER_FRAME;
-    if ((ret = avctx->get_buffer(avctx, &ractx->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ractx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/roqvideoenc.c b/libavcodec/roqvideoenc.c
index 2a62d5509d..58dd255a55 100644
--- a/libavcodec/roqvideoenc.c
+++ b/libavcodec/roqvideoenc.c
@@ -1031,8 +1031,8 @@ static int roq_encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_s
     if (enc->first_frame) {
         /* Alloc memory for the reconstruction data (we must know the stride
          for that) */
-        if (avctx->get_buffer(avctx, enc->current_frame) ||
-            avctx->get_buffer(avctx, enc->last_frame)) {
+        if (ff_get_buffer(avctx, enc->current_frame) ||
+            ff_get_buffer(avctx, enc->last_frame)) {
             av_log(avctx, AV_LOG_ERROR, "  RoQ: get_buffer() failed\n");
             return -1;
         }
diff --git a/libavcodec/s302m.c b/libavcodec/s302m.c
index 34018aeb46..f18059da51 100644
--- a/libavcodec/s302m.c
+++ b/libavcodec/s302m.c
@@ -22,6 +22,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 
 #define AES3_HEADER_LEN 4
 
@@ -94,7 +95,7 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data,
     /* get output buffer */
     block_size = (avctx->bits_per_coded_sample + 4) / 4;
     s->frame.nb_samples = 2 * (buf_size / block_size) / avctx->channels;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c
index f96a003e75..2a127c50b9 100644
--- a/libavcodec/shorten.c
+++ b/libavcodec/shorten.c
@@ -28,6 +28,7 @@
 
 #include <limits.h>
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 #include "get_bits.h"
 #include "golomb.h"
@@ -598,7 +599,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data,
             if (s->cur_chan == s->channels) {
                 /* get output buffer */
                 s->frame.nb_samples = s->blocksize;
-                if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+                if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
                     av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                     return ret;
                 }
diff --git a/libavcodec/sipr.c b/libavcodec/sipr.c
index 818524ca62..b862e7d3be 100644
--- a/libavcodec/sipr.c
+++ b/libavcodec/sipr.c
@@ -27,6 +27,7 @@
 
 #include "libavutil/mathematics.h"
 #include "avcodec.h"
+#include "internal.h"
 #define BITSTREAM_READER_LE
 #include "get_bits.h"
 #include "dsputil.h"
@@ -541,7 +542,7 @@ static int sipr_decode_frame(AVCodecContext *avctx, void *data,
     /* get output buffer */
     ctx->frame.nb_samples = mode_par->frames_per_packet * subframe_size *
                             mode_par->subframe_count;
-    if ((ret = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &ctx->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/smacker.c b/libavcodec/smacker.c
index e07fc3749d..bce23f4e0a 100644
--- a/libavcodec/smacker.c
+++ b/libavcodec/smacker.c
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "libavutil/audioconvert.h"
 #include "mathops.h"
 
@@ -636,7 +637,7 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = unp_size / (avctx->channels * (bits + 1));
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
index ef136b94f0..82b828b6dd 100644
--- a/libavcodec/svq1enc.c
+++ b/libavcodec/svq1enc.c
@@ -512,8 +512,8 @@ static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
     }
 
     if(!s->current_picture.data[0]){
-        avctx->get_buffer(avctx, &s->current_picture);
-        avctx->get_buffer(avctx, &s->last_picture);
+        ff_get_buffer(avctx, &s->current_picture);
+        ff_get_buffer(avctx, &s->last_picture);
         s->scratchbuf = av_malloc(s->current_picture.linesize[0] * 16 * 2);
     }
 
diff --git a/libavcodec/thread.h b/libavcodec/thread.h
index 7f018fc441..782c03cbcf 100644
--- a/libavcodec/thread.h
+++ b/libavcodec/thread.h
@@ -89,7 +89,7 @@ void ff_thread_await_progress(AVFrame *f, int progress, int field);
 
 /**
  * Wrapper around get_buffer() for frame-multithreaded codecs.
- * Call this function instead of avctx->get_buffer(f).
+ * Call this function instead of ff_get_buffer(f).
  * Cannot be called after the codec has called ff_thread_finish_setup().
  *
  * @param avctx The current context.
diff --git a/libavcodec/truespeech.c b/libavcodec/truespeech.c
index 5ef0a01427..4b69b90ddb 100644
--- a/libavcodec/truespeech.c
+++ b/libavcodec/truespeech.c
@@ -21,6 +21,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "dsputil.h"
 #include "get_bits.h"
 
@@ -325,7 +326,7 @@ static int truespeech_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     c->frame.nb_samples = iterations * 240;
-    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index 1743f7d0ac..9ea7d030cd 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -31,6 +31,7 @@
 //#define DEBUG
 #include <limits.h>
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "libavutil/crc.h"
 
@@ -343,7 +344,7 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = framelen;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index c58a9bc75d..061ff7636b 100644
--- a/libavcodec/twinvq.c
+++ b/libavcodec/twinvq.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "fft.h"
@@ -840,7 +841,7 @@ static int twin_decode_frame(AVCodecContext * avctx, void *data,
     /* get output buffer */
     if (tctx->discarded_packets >= 2) {
         tctx->frame.nb_samples = mtab->size;
-        if ((ret = avctx->get_buffer(avctx, &tctx->frame)) < 0) {
+        if ((ret = ff_get_buffer(avctx, &tctx->frame)) < 0) {
             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
             return ret;
         }
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 7902e987ca..e657a2cece 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -552,7 +552,7 @@ int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
     if(pic->data[0] == NULL) {
         /* We will copy from buffer, so must be readable */
         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
-        return s->get_buffer(s, pic);
+        return ff_get_buffer(s, pic);
     }
 
     /* If internal buffer type return the same buffer */
@@ -571,7 +571,7 @@ int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
         pic->data[i] = pic->base[i] = NULL;
     pic->opaque = NULL;
     /* Allocate new frame */
-    if (s->get_buffer(s, pic))
+    if (ff_get_buffer(s, pic))
         return -1;
     /* Copy image data from old buffer to new buffer */
     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
@@ -1815,7 +1815,7 @@ unsigned int avpriv_toupper4(unsigned int x)
 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
 {
     f->owner = avctx;
-    return avctx->get_buffer(avctx, f);
+    return ff_get_buffer(avctx, f);
 }
 
 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
@@ -1863,3 +1863,16 @@ int avcodec_is_open(AVCodecContext *s)
 {
     return !!s->internal;
 }
+
+int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
+{
+    switch (avctx->codec_type) {
+        case AVMEDIA_TYPE_VIDEO:
+            if (av_image_check_size(avctx->width, avctx->height, 0, avctx)) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid dimensions %dx%d\n",
+                       avctx->width, avctx->height);
+                return AVERROR_INVALIDDATA;
+            }
+    }
+    return avctx->get_buffer(avctx, frame);
+}
diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c
index 4659971335..bdd9ca056e 100644
--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -45,6 +45,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 
 #define VMD_HEADER_SIZE 0x330
@@ -396,7 +397,7 @@ static int vmdvideo_decode_frame(AVCodecContext *avctx,
         return buf_size;
 
     s->frame.reference = 1;
-    if (avctx->get_buffer(avctx, &s->frame)) {
+    if (ff_get_buffer(avctx, &s->frame)) {
         av_log(s->avctx, AV_LOG_ERROR, "VMD Video: get_buffer() failed\n");
         return -1;
     }
@@ -569,7 +570,7 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c
index 5a0a4a4a9b..a22b541b11 100644
--- a/libavcodec/vorbisdec.c
+++ b/libavcodec/vorbisdec.c
@@ -27,6 +27,7 @@
 
 #define BITSTREAM_READER_LE
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "dsputil.h"
 #include "fft.h"
@@ -1668,7 +1669,7 @@ static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
 
     /* get output buffer */
     vc->frame.nb_samples = len;
-    if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
+    if ((ret = ff_get_buffer(avccontext, &vc->frame)) < 0) {
         av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 31377e75c6..73986f89f4 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -23,6 +23,7 @@
 
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "unary.h"
 
@@ -1207,7 +1208,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = s->samples;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index c88a035336..a0eb5c3b63 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -34,6 +34,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "wma.h"
 
 #undef NDEBUG
@@ -842,7 +843,7 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = nb_frames * s->frame_len;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 902c4e32bd..93bccb0e37 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -1384,7 +1384,7 @@ static int decode_frame(WMAProDecodeCtx *s, int *got_frame_ptr)
 
     /* get output buffer */
     s->frame.nb_samples = s->samples_per_frame;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         s->packet_loss = 1;
         return 0;
diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 41a9ea3bb8..444a7274cc 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -29,6 +29,7 @@
 
 #include <math.h>
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "put_bits.h"
 #include "wmavoice_data.h"
@@ -1814,7 +1815,7 @@ static int synth_superframe(AVCodecContext *ctx, int *got_frame_ptr)
 
     /* get output buffer */
     s->frame.nb_samples = 480;
-    if ((res = ctx->get_buffer(ctx, &s->frame)) < 0) {
+    if ((res = ff_get_buffer(ctx, &s->frame)) < 0) {
         av_log(ctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return res;
     }
diff --git a/libavcodec/ws-snd1.c b/libavcodec/ws-snd1.c
index 15eb6f895a..685c8ecfd9 100644
--- a/libavcodec/ws-snd1.c
+++ b/libavcodec/ws-snd1.c
@@ -22,6 +22,7 @@
 #include <stdint.h>
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 
 /**
  * @file
@@ -89,7 +90,7 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     s->frame.nb_samples = out_size;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index d0def65f20..fd7de1c9d7 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -34,6 +34,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "bytestream.h"
 #define BITSTREAM_READER_LE
 #include "get_bits.h"
@@ -560,7 +561,7 @@ static int xan_decode_frame(AVCodecContext *avctx,
         return AVERROR_INVALIDDATA;
     }
 
-    if ((ret = avctx->get_buffer(avctx, &s->current_frame))) {
+    if ((ret = ff_get_buffer(avctx, &s->current_frame))) {
         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
diff --git a/libavcodec/yop.c b/libavcodec/yop.c
index 3c2d8b8957..e1d9753cb1 100644
--- a/libavcodec/yop.c
+++ b/libavcodec/yop.c
@@ -26,6 +26,7 @@
 #include "libavutil/imgutils.h"
 
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 
 typedef struct YopDecContext {
@@ -198,7 +199,7 @@ static int yop_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     if (s->frame.data[0])
         avctx->release_buffer(avctx, &s->frame);
 
-    ret = avctx->get_buffer(avctx, &s->frame);
+    ret = ff_get_buffer(avctx, &s->frame);
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;