frsh: Export information about the last RTP contract and VRES

[frescor/ffmpeg.git] / libavcodec / shorten.c

diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c
index 22ed3568a8f7dd3b126673a72353e28a84a4409e..328aaccd29828b1c5a470c0687abc992092ebb73 100644 (file)
--- a/libavcodec/shorten.c
+++ b/libavcodec/shorten.c
@@ -2,23 +2,25 @@
  * Shorten decoder
  * Copyright (c) 2005 Jeff Muizelaar
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library 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 this library; 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
  */
 
 /**
- * @file shorten.c
+ * @file libavcodec/shorten.c
  * Shorten decoder
  * @author Jeff Muizelaar
  *
@@ -27,7 +29,7 @@
 #define DEBUG
 #include <limits.h>
 #include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
 #include "golomb.h"
 
 #define MAX_CHANNELS 8
@@ -84,7 +86,7 @@ typedef struct ShortenContext {
     uint8_t *bitstream;
     int bitstream_size;
     int bitstream_index;
-    int allocated_bitstream_size;
+    unsigned int allocated_bitstream_size;
     int header_size;
     uint8_t header[OUT_BUFFER_SIZE];
     int version;
@@ -98,26 +100,36 @@ typedef struct ShortenContext {
     int32_t lpcqoffset;
 } ShortenContext;
 
-static int shorten_decode_init(AVCodecContext * avctx)
+static av_cold int shorten_decode_init(AVCodecContext * avctx)
 {
     ShortenContext *s = avctx->priv_data;
     s->avctx = avctx;
+    avctx->sample_fmt = SAMPLE_FMT_S16;
 
     return 0;
 }
 
-static void allocate_buffers(ShortenContext *s)
+static int allocate_buffers(ShortenContext *s)
 {
     int i, chan;
     for (chan=0; chan<s->channels; chan++) {
+        if(FFMAX(1, s->nmean) >= UINT_MAX/sizeof(int32_t)){
+            av_log(s->avctx, AV_LOG_ERROR, "nmean too large\n");
+            return -1;
+        }
+        if(s->blocksize + s->nwrap >= UINT_MAX/sizeof(int32_t) || s->blocksize + s->nwrap <= (unsigned)s->nwrap){
+            av_log(s->avctx, AV_LOG_ERROR, "s->blocksize + s->nwrap too large\n");
+            return -1;
+        }
+
         s->offset[chan] = av_realloc(s->offset[chan], sizeof(int32_t)*FFMAX(1, s->nmean));
 
         s->decoded[chan] = av_realloc(s->decoded[chan], sizeof(int32_t)*(s->blocksize + s->nwrap));
         for (i=0; i<s->nwrap; i++)
             s->decoded[chan][i] = 0;
         s->decoded[chan] += s->nwrap;
-
     }
+    return 0;
 }
 
 
@@ -161,12 +173,12 @@ static void init_offset(ShortenContext *s)
             s->offset[chan][i] = mean;
 }
 
-static int inline get_le32(GetBitContext *gb)
+static inline int get_le32(GetBitContext *gb)
 {
     return bswap_32(get_bits_long(gb, 32));
 }
 
-static short inline get_le16(GetBitContext *gb)
+static inline short get_le16(GetBitContext *gb)
 {
     return bswap_16(get_bits_long(gb, 16));
 }
@@ -216,9 +228,9 @@ static int decode_wave_header(AVCodecContext *avctx, uint8_t *header, int header
     avctx->sample_rate = get_le32(&hb);
     avctx->bit_rate = get_le32(&hb) * 8;
     avctx->block_align = get_le16(&hb);
-    avctx->bits_per_sample = get_le16(&hb);
+    avctx->bits_per_coded_sample = get_le16(&hb);
 
-    if (avctx->bits_per_sample != 16) {
+    if (avctx->bits_per_coded_sample != 16) {
         av_log(avctx, AV_LOG_ERROR, "unsupported number of bits per sample\n");
         return -1;
     }
@@ -257,8 +269,10 @@ static void decode_subframe_lpc(ShortenContext *s, int channel, int residual_siz
 
 static int shorten_decode_frame(AVCodecContext *avctx,
         void *data, int *data_size,
-        uint8_t *buf, int buf_size)
+        AVPacket *avpkt)
 {
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
     ShortenContext *s = avctx->priv_data;
     int i, input_buf_size = 0;
     int16_t *samples = data;
@@ -282,17 +296,18 @@ static int shorten_decode_frame(AVCodecContext *avctx,
         s->bitstream_size= buf_size;
 
         if(buf_size < s->max_framesize){
-            //dprintf("wanna more data ... %d\n", buf_size);
+            //dprintf(avctx, "wanna more data ... %d\n", buf_size);
+            *data_size = 0;
             return input_buf_size;
         }
     }
     init_get_bits(&s->gb, buf, buf_size*8);
-    get_bits(&s->gb, s->bitindex);
+    skip_bits(&s->gb, s->bitindex);
     if (!s->blocksize)
     {
         int maxnlpc = 0;
         /* shorten signature */
-        if (get_bits_long(&s->gb, 32) != bswap_32(ff_get_fourcc("ajkg"))) {
+        if (get_bits_long(&s->gb, 32) != AV_RB32("ajkg")) {
             av_log(s->avctx, AV_LOG_ERROR, "missing shorten magic 'ajkg'\n");
             return -1;
         }
@@ -324,7 +339,8 @@ static int shorten_decode_frame(AVCodecContext *avctx,
         }
         s->nwrap = FFMAX(NWRAP, maxnlpc);
 
-        allocate_buffers(s);
+        if (allocate_buffers(s))
+            return -1;
 
         init_offset(s);
 
@@ -332,7 +348,7 @@ static int shorten_decode_frame(AVCodecContext *avctx,
             s->lpcqoffset = V2LPCQOFFSET;
 
         if (get_ur_golomb_shorten(&s->gb, FNSIZE) != FN_VERBATIM) {
-            av_log(s->avctx, AV_LOG_ERROR, "missing verbatim section at begining of stream\n");
+            av_log(s->avctx, AV_LOG_ERROR, "missing verbatim section at beginning of stream\n");
             return -1;
         }
 
@@ -459,6 +475,7 @@ static int shorten_decode_frame(AVCodecContext *avctx,
                 s->blocksize = get_uint(s, av_log2(s->blocksize));
                 break;
             case FN_QUIT:
+                *data_size = 0;
                 return buf_size;
                 break;
             default:
@@ -487,7 +504,7 @@ frame_done:
         return i;
 }
 
-static int shorten_decode_close(AVCodecContext *avctx)
+static av_cold int shorten_decode_close(AVCodecContext *avctx)
 {
     ShortenContext *s = avctx->priv_data;
     int i;
@@ -518,4 +535,5 @@ AVCodec shorten_decoder = {
     shorten_decode_close,
     shorten_decode_frame,
     .flush= shorten_flush,
+    .long_name= NULL_IF_CONFIG_SMALL("Shorten"),
 };