vc1dec: prevent v_edge_pos from becoming negative.

[ffmpeg] / libavcodec / dsicinav.c

diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index ddec868baad8f01834f46c70bcba61f4e0df218d..76d4d1fc4d4e9c5b78e5244ffc52d0d16862f9a3 100644 (file)
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -24,8 +24,10 @@
  * Delphine Software International CIN audio/video decoders
  */
 
+#include "libavutil/channel_layout.h"
 #include "avcodec.h"
 #include "bytestream.h"
+#include "internal.h"
 #include "mathops.h"
 
 
@@ -211,7 +213,7 @@ static int cin_decode_rle(const unsigned char *src, int src_size, unsigned char
         } else {
             len = code + 1;
             if (len > src_end-src) {
-                av_log(0, AV_LOG_ERROR, "RLE overread\n");
+                av_log(NULL, AV_LOG_ERROR, "RLE overread\n");
                 return AVERROR_INVALIDDATA;
             }
             memcpy(dst, src, FFMIN(len, dst_end - dst));
@@ -223,7 +225,7 @@ static int cin_decode_rle(const unsigned char *src, int src_size, unsigned char
 }
 
 static int cinvideo_decode_frame(AVCodecContext *avctx,
-                                 void *data, int *data_size,
+                                 void *data, int *got_frame,
                                  AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
@@ -269,7 +271,7 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
         break;
     case 35:
-        cin_decode_huffman(buf, bitmap_frame_size,
+        bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
           cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
         cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
@@ -319,7 +321,7 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
 
     FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
 
-    *data_size = sizeof(AVFrame);
+    *got_frame = 1;
     *(AVFrame *)data = cin->frame;
 
     return buf_size;
@@ -341,14 +343,11 @@ static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
 {
     CinAudioContext *cin = avctx->priv_data;
 
-    if (avctx->channels != 1) {
-        av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
-        return AVERROR_PATCHWELCOME;
-    }
-
     cin->initial_decode_frame = 1;
-    cin->delta = 0;
-    avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+    cin->delta                = 0;
+    avctx->sample_fmt         = AV_SAMPLE_FMT_S16;
+    avctx->channels           = 1;
+    avctx->channel_layout     = AV_CH_LAYOUT_MONO;
 
     avcodec_get_frame_defaults(&cin->frame);
     avctx->coded_frame = &cin->frame;
@@ -367,7 +366,7 @@ 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;
     }