From 0fe04628b95aa7d5b2787908fde55549aadb7076 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 2 Feb 2008 08:26:49 +0000
Subject: [PATCH] IMC decoder always operates on 64-byte blocks

Originally committed as revision 11804 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/imc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 6d1ec098a0..ed2e20379b 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -41,6 +41,7 @@
 
 #include "imcdata.h"
 
+#define IMC_BLOCK_SIZE 64
 #define IMC_FRAME_ID 0x21
 #define BANDS 32
 #define COEFFS 256
@@ -637,11 +638,10 @@ static int imc_decode_frame(AVCodecContext * avctx,
     int counter, bitscount;
     uint16_t *buf16 = (uint16_t *) buf;
 
-    /* FIXME: input should not be modified */
-    for(i = 0; i < FFMIN(buf_size, avctx->block_align) / 2; i++)
+    for(i = 0; i < IMC_BLOCK_SIZE / 2; i++)
         buf16[i] = bswap_16(buf16[i]);
 
-    init_get_bits(&q->gb, buf, 512);
+    init_get_bits(&q->gb, buf, IMC_BLOCK_SIZE * 8);
 
     /* Check the frame header */
     imc_hdr = get_bits(&q->gb, 9);
@@ -788,7 +788,7 @@ static int imc_decode_frame(AVCodecContext * avctx,
 
     *data_size = COEFFS * sizeof(int16_t);
 
-    return avctx->block_align;
+    return IMC_BLOCK_SIZE;
 }