Check output buffer size in nellymoser decoder.

[ffmpeg] / libavcodec / vp8.c

diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c
index fdf63f095d54ee82fe80f8237ef731ece1f5431b..7cbf8b14343a978c79541134b8893e127ae7ca3e 100644 (file)
--- a/libavcodec/vp8.c
+++ b/libavcodec/vp8.c
@@ -5,20 +5,20 @@
  * Copyright (C) 2010 Ronald S. Bultje
  * Copyright (C) 2010 Jason Garrett-Glaser
  *
- * 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
  */
 
@@ -641,8 +641,6 @@ void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_
  * @param block destination for block coefficients
  * @param probs probabilities to use when reading trees from the bitstream
  * @param i initial coeff index, 0 unless a separate DC block is coded
- * @param zero_nhood the initial prediction context for number of surrounding
- *                   all-zero blocks (only left/top, so 0-2)
  * @param qmul array holding the dc/ac dequant factor at position 0/1
  * @return 0 if no coeffs were decoded
  *         otherwise, the index of the last coeff decoded plus one
@@ -701,6 +699,17 @@ skip_eob:
 }
 #endif
 
+/**
+ * @param c arithmetic bitstream reader context
+ * @param block destination for block coefficients
+ * @param probs probabilities to use when reading trees from the bitstream
+ * @param i initial coeff index, 0 unless a separate DC block is coded
+ * @param zero_nhood the initial prediction context for number of surrounding
+ *                   all-zero blocks (only left/top, so 0-2)
+ * @param qmul array holding the dc/ac dequant factor at position 0/1
+ * @return 0 if no coeffs were decoded
+ *         otherwise, the index of the last coeff decoded plus one
+ */
 static av_always_inline
 int decode_block_coeffs(VP56RangeCoder *c, DCTELEM block[16],
                         uint8_t probs[16][3][NUM_DCT_TOKENS-1],
@@ -1034,10 +1043,9 @@ static const uint8_t subpel_idx[3][8] = {
 };
 
 /**
- * Generic MC function.
+ * luma MC function
  *
  * @param s VP8 decoding context
- * @param luma 1 for luma (Y) planes, 0 for chroma (Cb/Cr) planes
  * @param dst target buffer for block data at block position
  * @param ref reference picture buffer at origin (0, 0)
  * @param mv motion vector (relative to block position) to get pixel data from
@@ -1083,6 +1091,23 @@ void vp8_mc_luma(VP8Context *s, uint8_t *dst, AVFrame *ref, const VP56mv *mv,
     }
 }
 
+/**
+ * chroma MC function
+ *
+ * @param s VP8 decoding context
+ * @param dst1 target buffer for block data at block position (U plane)
+ * @param dst2 target buffer for block data at block position (V plane)
+ * @param ref reference picture buffer at origin (0, 0)
+ * @param mv motion vector (relative to block position) to get pixel data from
+ * @param x_off horizontal position of block from origin (0, 0)
+ * @param y_off vertical position of block from origin (0, 0)
+ * @param block_w width of block (16, 8 or 4)
+ * @param block_h height of block (always same as block_w)
+ * @param width width of src/dst plane data
+ * @param height height of src/dst plane data
+ * @param linesize size of a single line of plane data, including padding
+ * @param mc_func motion compensation function pointers (bilinear or sixtap MC)
+ */
 static av_always_inline
 void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, AVFrame *ref,
                    const VP56mv *mv, int x_off, int y_off,
@@ -1696,7 +1721,7 @@ static av_cold int vp8_decode_init(AVCodecContext *avctx)
     avctx->pix_fmt = PIX_FMT_YUV420P;
 
     dsputil_init(&s->dsp, avctx);
-    ff_h264_pred_init(&s->hpc, CODEC_ID_VP8, 8);
+    ff_h264_pred_init(&s->hpc, CODEC_ID_VP8, 8, 1);
     ff_vp8dsp_init(&s->vp8dsp);
 
     return 0;
@@ -1739,15 +1764,14 @@ static int vp8_decode_update_thread_context(AVCodecContext *dst, const AVCodecCo
 }
 
 AVCodec ff_vp8_decoder = {
-    "vp8",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_VP8,
-    sizeof(VP8Context),
-    vp8_decode_init,
-    NULL,
-    vp8_decode_free,
-    vp8_decode_frame,
-    CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
+    .name           = "vp8",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_VP8,
+    .priv_data_size = sizeof(VP8Context),
+    .init           = vp8_decode_init,
+    .close          = vp8_decode_free,
+    .decode         = vp8_decode_frame,
+    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
     .flush = vp8_decode_flush,
     .long_name = NULL_IF_CONFIG_SMALL("On2 VP8"),
     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(vp8_decode_init_thread_copy),