X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Favpacket.c;h=5e2292de2849f6d7cbb078cd662112186cd9220c;hb=34e1b0754638ea6e0356239aad01e74de3a582a5;hp=82890c36760fe19143a26268803c592146c00000;hpb=a08d918e680266f66f85ddaf232946f7147b74a8;p=ffmpeg

diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 82890c36760..5e2292de284 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -2,72 +2,85 @@
  * AVPacket functions for libavcodec
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "avcodec.h"
 #include "libavutil/avassert.h"
-
+#include "avcodec.h"
 
 void av_destruct_packet_nofree(AVPacket *pkt)
 {
-    pkt->data = NULL; pkt->size = 0;
+    pkt->data            = NULL;
+    pkt->size            = 0;
+    pkt->side_data       = NULL;
+    pkt->side_data_elems = 0;
 }
 
 void av_destruct_packet(AVPacket *pkt)
 {
+    int i;
+
     av_free(pkt->data);
-    pkt->data = NULL; pkt->size = 0;
+    pkt->data = NULL;
+    pkt->size = 0;
+
+    for (i = 0; i < pkt->side_data_elems; i++)
+        av_free(pkt->side_data[i].data);
+    av_freep(&pkt->side_data);
+    pkt->side_data_elems = 0;
 }
 
 void av_init_packet(AVPacket *pkt)
 {
-    pkt->pts   = AV_NOPTS_VALUE;
-    pkt->dts   = AV_NOPTS_VALUE;
-    pkt->pos   = -1;
-    pkt->duration = 0;
+    pkt->pts                  = AV_NOPTS_VALUE;
+    pkt->dts                  = AV_NOPTS_VALUE;
+    pkt->pos                  = -1;
+    pkt->duration             = 0;
     pkt->convergence_duration = 0;
-    pkt->flags = 0;
-    pkt->stream_index = 0;
-    pkt->destruct= NULL;
+    pkt->flags                = 0;
+    pkt->stream_index         = 0;
+    pkt->destruct             = NULL;
+    pkt->side_data            = NULL;
+    pkt->side_data_elems      = 0;
 }
 
 int av_new_packet(AVPacket *pkt, int size)
 {
-    uint8_t *data= NULL;
-    if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
+    uint8_t *data = NULL;
+    if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
-    if (data){
+    if (data) {
         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-    }else
-        size=0;
+    } else
+        size = 0;
 
     av_init_packet(pkt);
-    pkt->data = data;
-    pkt->size = size;
+    pkt->data     = data;
+    pkt->size     = size;
     pkt->destruct = av_destruct_packet;
-    if(!data)
+    if (!data)
         return AVERROR(ENOMEM);
     return 0;
 }
 
 void av_shrink_packet(AVPacket *pkt, int size)
 {
-    if (pkt->size <= size) return;
+    if (pkt->size <= size)
+        return;
     pkt->size = size;
     memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 }
@@ -78,40 +91,135 @@ int av_grow_packet(AVPacket *pkt, int grow_by)
     av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE);
     if (!pkt->size)
         return av_new_packet(pkt, grow_by);
-    if ((unsigned)grow_by > INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
+    if ((unsigned)grow_by >
+        INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
         return -1;
-    new_ptr = av_realloc(pkt->data, pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE);
+    new_ptr = av_realloc(pkt->data,
+                         pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE);
     if (!new_ptr)
         return AVERROR(ENOMEM);
-    pkt->data = new_ptr;
+    pkt->data  = new_ptr;
     pkt->size += grow_by;
     memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
     return 0;
 }
 
+#define DUP_DATA(dst, src, size, padding)                               \
+    do {                                                                \
+        void *data;                                                     \
+        if (padding) {                                                  \
+            if ((unsigned)(size) >                                      \
+                (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE)        \
+                goto failed_alloc;                                      \
+            data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);      \
+        } else {                                                        \
+            data = av_malloc(size);                                     \
+        }                                                               \
+        if (!data)                                                      \
+            goto failed_alloc;                                          \
+        memcpy(data, src, size);                                        \
+        if (padding)                                                    \
+            memset((uint8_t *)data + size, 0,                           \
+                   FF_INPUT_BUFFER_PADDING_SIZE);                       \
+        dst = data;                                                     \
+    } while (0)
+
 int av_dup_packet(AVPacket *pkt)
 {
-    if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) {
-        uint8_t *data;
-        /* We duplicate the packet and don't forget to add the padding again. */
-        if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
-            return AVERROR(ENOMEM);
-        data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
-        if (!data) {
-            return AVERROR(ENOMEM);
-        }
-        memcpy(data, pkt->data, pkt->size);
-        memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-        pkt->data = data;
+    AVPacket tmp_pkt;
+
+    if (((pkt->destruct == av_destruct_packet_nofree) ||
+         (pkt->destruct == NULL)) && pkt->data) {
+        tmp_pkt = *pkt;
+
+        pkt->data      = NULL;
+        pkt->side_data = NULL;
+        DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1);
         pkt->destruct = av_destruct_packet;
+
+        if (pkt->side_data_elems) {
+            int i;
+
+            DUP_DATA(pkt->side_data, tmp_pkt.side_data,
+                     pkt->side_data_elems * sizeof(*pkt->side_data), 0);
+            memset(pkt->side_data, 0,
+                   pkt->side_data_elems * sizeof(*pkt->side_data));
+            for (i = 0; i < pkt->side_data_elems; i++)
+                DUP_DATA(pkt->side_data[i].data, tmp_pkt.side_data[i].data,
+                         pkt->side_data[i].size, 1);
+        }
     }
     return 0;
+
+failed_alloc:
+    av_destruct_packet(pkt);
+    return AVERROR(ENOMEM);
 }
 
 void av_free_packet(AVPacket *pkt)
 {
     if (pkt) {
-        if (pkt->destruct) pkt->destruct(pkt);
-        pkt->data = NULL; pkt->size = 0;
+        if (pkt->destruct)
+            pkt->destruct(pkt);
+        pkt->data            = NULL;
+        pkt->size            = 0;
+        pkt->side_data       = NULL;
+        pkt->side_data_elems = 0;
+    }
+}
+
+uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                                 int size)
+{
+    int elems = pkt->side_data_elems;
+
+    if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data))
+        return NULL;
+    if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
+        return NULL;
+
+    pkt->side_data = av_realloc(pkt->side_data,
+                                (elems + 1) * sizeof(*pkt->side_data));
+    if (!pkt->side_data)
+        return NULL;
+
+    pkt->side_data[elems].data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!pkt->side_data[elems].data)
+        return NULL;
+    pkt->side_data[elems].size = size;
+    pkt->side_data[elems].type = type;
+    pkt->side_data_elems++;
+
+    return pkt->side_data[elems].data;
+}
+
+uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                                 int *size)
+{
+    int i;
+
+    for (i = 0; i < pkt->side_data_elems; i++) {
+        if (pkt->side_data[i].type == type) {
+            if (size)
+                *size = pkt->side_data[i].size;
+            return pkt->side_data[i].data;
+        }
+    }
+    return NULL;
+}
+
+int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                               int size)
+{
+    int i;
+
+    for (i = 0; i < pkt->side_data_elems; i++) {
+        if (pkt->side_data[i].type == type) {
+            if (size > pkt->side_data[i].size)
+                return AVERROR(ENOMEM);
+            pkt->side_data[i].size = size;
+            return 0;
+        }
     }
+    return AVERROR(ENOENT);
 }