Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavcodec / adpcm.c

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 41d0d98d26362f9c7b31b3a41dad468a3bf9c520..c1f6ee0a5bfc13839dddd8c8f51d71cd3f40b91b 100644 (file)
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -1,20 +1,20 @@
 /*
  * Copyright (c) 2001-2003 The ffmpeg Project
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avcodec.h"
@@ -277,11 +277,9 @@ static int xa_decode(AVCodecContext *avctx,
 
         shift  = 12 - (in[4+i*2] & 15);
         filter = in[4+i*2] >> 4;
-        if (filter > 4) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Invalid XA-ADPCM filter %d (max. allowed is 4)\n",
-                   filter);
-            return AVERROR_INVALIDDATA;
+        if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
+            av_log_ask_for_sample(avctx, "unknown XA-ADPCM filter %d\n", filter);
+            filter=0;
         }
         f0 = xa_adpcm_table[filter][0];
         f1 = xa_adpcm_table[filter][1];
@@ -310,12 +308,11 @@ static int xa_decode(AVCodecContext *avctx,
 
         shift  = 12 - (in[5+i*2] & 15);
         filter = in[5+i*2] >> 4;
-        if (filter > 4) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Invalid XA-ADPCM filter %d (max. allowed is 4)\n",
-                   filter);
-            return AVERROR_INVALIDDATA;
+        if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
+            av_log_ask_for_sample(avctx, "unknown XA-ADPCM filter %d\n", filter);
+            filter=0;
         }
+
         f0 = xa_adpcm_table[filter][0];
         f1 = xa_adpcm_table[filter][1];
 
@@ -421,6 +418,9 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
 
     *coded_samples = 0;
 
+    if(ch <= 0)
+        return 0;
+
     switch (avctx->codec->id) {
     /* constant, only check buf_size */
     case CODEC_ID_ADPCM_EA_XAS:
@@ -926,6 +926,9 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
         /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
            each coding 28 stereo samples. */
 
+        if(avctx->channels != 2)
+            return AVERROR_INVALIDDATA;
+
         current_left_sample   = sign_extend(bytestream2_get_le16u(&gb), 16);
         previous_left_sample  = sign_extend(bytestream2_get_le16u(&gb), 16);
         current_right_sample  = sign_extend(bytestream2_get_le16u(&gb), 16);
@@ -1214,7 +1217,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
 
         /* Initialize the previous sample.  */
         for (i = 0; i < 4; i++)
-            prev[0][i] = sign_extend(bytestream2_get_be16u(&gb), 16);
+            prev[i>>1][i&1] = sign_extend(bytestream2_get_be16u(&gb), 16);
 
         for (ch = 0; ch <= st; ch++) {
             samples = (short *)c->frame.data[0] + ch;