Add spectral extension to the E-AC-3 decoder.

[ffmpeg] / libavcodec / mpegvideo_xvmc.c

diff --git a/libavcodec/mpegvideo_xvmc.c b/libavcodec/mpegvideo_xvmc.c
index 51dcb8cfa7fb0f90fe9cac213f941ea737b7d299..df81e5da6836a41e6970e3357f8096ace606f2a0 100644 (file)
--- a/libavcodec/mpegvideo_xvmc.c
+++ b/libavcodec/mpegvideo_xvmc.c
@@ -20,6 +20,7 @@
  */
 
 #include <limits.h>
+#include <X11/extensions/XvMC.h>
 
 #include "avcodec.h"
 #include "dsputil.h"
@@ -43,12 +44,12 @@ void ff_xvmc_init_block(MpegEncContext *s)
     struct xvmc_pix_fmt *render = (struct xvmc_pix_fmt*)s->current_picture.data[2];
     assert(render && render->xvmc_id == AV_XVMC_ID);
 
-    s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
+    s->block = (DCTELEM (*)[64])(render->data_blocks + render->next_free_data_block_num * 64);
 }
 
 /**
- * Fill individual block pointers, so there are no gaps in the data_block array
- * in case not all blocks in MB are coded.
+ * Fills individual block pointers, so there are no gaps in the data_block array
+ * in case not all blocks in the macroblock are coded.
  */
 void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
 {
@@ -58,26 +59,29 @@ void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
     cbp <<= 12-mb_block_count;
     for (i = 0; i < mb_block_count; i++) {
         if (cbp & (1 << 11))
-            s->pblocks[i] = (short *)(&s->block[j++]);
+            s->pblocks[i] = &s->block[j++];
         else
             s->pblocks[i] = NULL;
-        cbp+=cbp;
+        cbp += cbp;
     }
 }
 
 /**
- * Find and store the surfaces that are used as reference frames.
+ * Finds and stores the surfaces that are used as reference frames.
  * This function should be called for every new field and/or frame.
  * It should be safe to call the function a few times for the same field.
  */
-int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
+int ff_xvmc_field_start(MpegEncContext *s, AVCodecContext *avctx)
 {
     struct xvmc_pix_fmt *last, *next, *render = (struct xvmc_pix_fmt*)s->current_picture.data[2];
     const int mb_block_count = 4 + (1 << s->chroma_format);
 
     assert(avctx);
     if (!render || render->xvmc_id != AV_XVMC_ID ||
-        !render->data_blocks || !render->mv_blocks) {
+        !render->data_blocks || !render->mv_blocks ||
+        (unsigned int)render->allocated_mv_blocks   > INT_MAX/(64*6) ||
+        (unsigned int)render->allocated_data_blocks > INT_MAX/64     ||
+        !render->p_surface) {
         av_log(avctx, AV_LOG_ERROR,
                "Render token doesn't look as expected.\n");
         return -1; // make sure that this is a render packet
@@ -90,7 +94,11 @@ int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
         return -1;
     }
     if (render->allocated_mv_blocks   < 1 ||
-        render->allocated_data_blocks < mb_block_count) {
+        render->allocated_data_blocks <  render->allocated_mv_blocks*mb_block_count ||
+        render->start_mv_blocks_num   >= render->allocated_mv_blocks                ||
+        render->next_free_data_block_num >
+                        render->allocated_data_blocks -
+                        mb_block_count*(render->allocated_mv_blocks-render->start_mv_blocks_num)) {
         av_log(avctx, AV_LOG_ERROR,
                "Rendering surface doesn't provide enough block structures to work with.\n");
         return -1;
@@ -126,7 +134,7 @@ return -1;
 }
 
 /**
- * Complete frame/field rendering by passing any remaining blocks.
+ * Completes frame/field rendering by passing any remaining blocks.
  * Normally ff_draw_horiz_band() is called for each slice, however,
  * some leftover blocks, for example from error_resilience(), may remain.
  * It should be safe to call the function a few times for the same field.
@@ -141,8 +149,8 @@ void ff_xvmc_field_end(MpegEncContext *s)
 }
 
 /**
- * Synthesize the data needed by XvMC to render one macroblock of data.
- * Fill all relevant fields, if necessary do IDCT.
+ * Synthesizes the data needed by XvMC to render one macroblock of data.
+ * Fills all relevant fields, if necessary do IDCT.
  */
 void ff_xvmc_decode_mb(MpegEncContext *s)
 {
@@ -277,9 +285,9 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
     if (s->flags & CODEC_FLAG_GRAY) {
         if (s->mb_intra) {                                   // intra frames are always full chroma blocks
             for (i = 4; i < blocks_per_mb; i++) {
-                memset(s->pblocks[i], 0, sizeof(short)*64);  // so we need to clear them
+                memset(s->pblocks[i], 0, sizeof(*s->pblocks[i]));  // so we need to clear them
                 if (!render->unsigned_intra)
-                    s->pblocks[i][0] = 1 << 10;
+                    *s->pblocks[i][0] = 1 << 10;
             }
         } else {
             cbp &= 0xf << (blocks_per_mb - 4);
@@ -294,9 +302,9 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
         if (s->block_last_index[i] >= 0) {
             // I do not have unsigned_intra MOCO to test, hope it is OK.
             if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra)))
-                s->pblocks[i][0] -= 1 << 10;
+                *s->pblocks[i][0] -= 1 << 10;
             if (!render->idct) {
-                s->dsp.idct(s->pblocks[i]);
+                s->dsp.idct(*s->pblocks[i]);
                 /* It is unclear if MC hardware requires pixel diff values to be
                  * in the range [-255;255]. TODO: Clipping if such hardware is
                  * ever found. As of now it would only be an unnecessary
@@ -305,7 +313,7 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
             // copy blocks only if the codec doesn't support pblocks reordering
             if (s->avctx->xvmc_acceleration == 1) {
                 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
-                       s->pblocks[i], sizeof(short)*64);
+                       s->pblocks[i], sizeof(*s->pblocks[i]));
             }
             render->next_free_data_block_num++;
         }