vc1_parser.o does not depend on h263dec.o and intrax8.o.

[ffmpeg] / libavcodec / dvdsubdec.c

diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index 6c0756b6a45292bfb48a2edbc82120509f376945..142241217c5b5baab242e65286c72ae91b86c6ad 100644 (file)
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -173,11 +173,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
 
     if (buf_size < 10)
         return -1;
-    sub_header->rects = NULL;
-    sub_header->num_rects = 0;
-    sub_header->format = 0;
-    sub_header->start_display_time = 0;
-    sub_header->end_display_time = 0;
+    memset(sub_header, 0, sizeof(*sub_header));
 
     if (AV_RB16(buf) == 0) {   /* HD subpicture with 4-byte offsets */
         big_offsets = 1;
@@ -191,22 +187,18 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
 
     cmd_pos = READ_OFFSET(buf + cmd_pos);
 
-    while ((cmd_pos + 2 + offset_size) < buf_size) {
+    while (cmd_pos > 0 && cmd_pos < buf_size - 2 - offset_size) {
         date = AV_RB16(buf + cmd_pos);
         next_cmd_pos = READ_OFFSET(buf + cmd_pos + 2);
-#ifdef DEBUG
-        av_log(NULL, AV_LOG_INFO, "cmd_pos=0x%04x next=0x%04x date=%d\n",
-               cmd_pos, next_cmd_pos, date);
-#endif
+        dprintf(NULL, "cmd_pos=0x%04x next=0x%04x date=%d\n",
+                cmd_pos, next_cmd_pos, date);
         pos = cmd_pos + 2 + offset_size;
         offset1 = -1;
         offset2 = -1;
         x1 = y1 = x2 = y2 = 0;
         while (pos < buf_size) {
             cmd = buf[pos++];
-#ifdef DEBUG
-            av_log(NULL, AV_LOG_INFO, "cmd=%02x\n", cmd);
-#endif
+            dprintf(NULL, "cmd=%02x\n", cmd);
             switch(cmd) {
             case 0x00:
                 /* menu subpicture */
@@ -239,9 +231,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                 alpha[1] = buf[pos + 1] >> 4;
                 alpha[0] = buf[pos + 1] & 0x0f;
                 pos += 2;
-#ifdef DEBUG
-            av_log(NULL, AV_LOG_INFO, "alpha=%x%x%x%x\n", alpha[0],alpha[1],alpha[2],alpha[3]);
-#endif
+            dprintf(NULL, "alpha=%x%x%x%x\n", alpha[0],alpha[1],alpha[2],alpha[3]);
                 break;
             case 0x05:
             case 0x85:
@@ -253,10 +243,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                 y2 = ((buf[pos + 4] & 0x0f) << 8) | buf[pos + 5];
                 if (cmd & 0x80)
                     is_8bit = 1;
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "x1=%d x2=%d y1=%d y2=%d\n",
-                       x1, x2, y1, y2);
-#endif
+                dprintf(NULL, "x1=%d x2=%d y1=%d y2=%d\n", x1, x2, y1, y2);
                 pos += 6;
                 break;
             case 0x06:
@@ -264,9 +251,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                     goto fail;
                 offset1 = AV_RB16(buf + pos);
                 offset2 = AV_RB16(buf + pos + 2);
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
-#endif
+                dprintf(NULL, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
                 pos += 4;
                 break;
             case 0x86:
@@ -274,9 +259,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                     goto fail;
                 offset1 = AV_RB32(buf + pos);
                 offset2 = AV_RB32(buf + pos + 4);
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
-#endif
+                dprintf(NULL, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
                 pos += 8;
                 break;
 
@@ -299,9 +282,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
             case 0xff:
                 goto the_end;
             default:
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "unrecognised subpicture command 0x%x\n", cmd);
-#endif
+                dprintf(NULL, "unrecognised subpicture command 0x%x\n", cmd);
                 goto the_end;
             }
         }
@@ -337,14 +318,13 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                            buf, offset1, buf_size, is_8bit);
                 decode_rle(bitmap + w, w * 2, w, h / 2,
                            buf, offset2, buf_size, is_8bit);
+                sub_header->rects[0]->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
                 if (is_8bit) {
                     if (yuv_palette == 0)
                         goto fail;
-                    sub_header->rects[0]->pict.data[1] = av_malloc(256 * 4);
                     sub_header->rects[0]->nb_colors = 256;
                     yuv_a_to_rgba(yuv_palette, alpha, (uint32_t*)sub_header->rects[0]->pict.data[1], 256);
                 } else {
-                    sub_header->rects[0]->pict.data[1] = av_malloc(4 * 4);
                     sub_header->rects[0]->nb_colors = 4;
                     guess_palette((uint32_t*)sub_header->rects[0]->pict.data[1],
                                   colormap, alpha, 0xffff00);
@@ -495,9 +475,9 @@ static int dvdsub_decode(AVCodecContext *avctx,
         goto no_subtitle;
 
 #if defined(DEBUG)
-    av_log(NULL, AV_LOG_INFO, "start=%d ms end =%d ms\n",
-           sub->start_display_time,
-           sub->end_display_time);
+    dprintf(NULL, "start=%d ms end =%d ms\n",
+            sub->start_display_time,
+            sub->end_display_time);
     ppm_save("/tmp/a.ppm", sub->rects[0]->pict.data[0],
              sub->rects[0]->w, sub->rects[0]->h, sub->rects[0]->pict.data[1]);
 #endif