mxfenc: switch to av_reallocp_array() and check allocation errors

Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavformat/mxfenc.c

@@ -1182,7 +1182,7 @@ static void mxf_write_klv_fill(AVFormatContext *s)
     }
 }
 
-static void mxf_write_partition(AVFormatContext *s, int bodysid,
+static int mxf_write_partition(AVFormatContext *s, int bodysid,
                                 int indexsid,
                                 const uint8_t *key, int write_metadata)
 {
@@ -1191,6 +1191,7 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
     int64_t header_byte_count_offset;
     unsigned index_byte_count = 0;
     uint64_t partition_offset = avio_tell(pb);
+    int err;
 
     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
@@ -1205,10 +1206,11 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
     }
 
     if (!memcmp(key, body_partition_key, 16)) {
-        mxf->body_partition_offset =
-            av_realloc(mxf->body_partition_offset,
-                       (mxf->body_partitions_count+1)*
-                       sizeof(*mxf->body_partition_offset));
+        if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,
+                                     sizeof(*mxf->body_partition_offset))) < 0) {
+            mxf->body_partitions_count = 0;
+            return err;
+        }
         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
     }
 
@@ -1273,6 +1275,8 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
     }
 
     avio_flush(pb);
+
+    return 0;
 }
 
 static const UID mxf_mpeg2_codec_uls[] = {
@@ -1673,13 +1677,14 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
     AVStream *st = s->streams[pkt->stream_index];
     MXFStreamContext *sc = st->priv_data;
     MXFIndexEntry ie = {0};
+    int err;
 
     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
-        mxf->index_entries = av_realloc(mxf->index_entries,
-            (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
-        if (!mxf->index_entries) {
+        if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count
+                                     + EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {
+            mxf->edit_units_count = 0;
             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
-            return -1;
+            return err;
         }
     }
 
@@ -1692,11 +1697,13 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
 
     if (!mxf->header_written) {
         if (mxf->edit_unit_byte_count) {
-            mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
+            if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)
+                return err;
             mxf_write_klv_fill(s);
             mxf_write_index_table_segment(s);
         } else {
-            mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
+            if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)
+                return err;
         }
         mxf->header_written = 1;
     }
@@ -1706,8 +1713,8 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
             !(ie.flags & 0x33)) { // I frame, Gop start
             mxf_write_klv_fill(s);
-            mxf_write_partition(s, 1, 2, body_partition_key, 0);
-
+            if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)
+                return err;
             mxf_write_klv_fill(s);
             mxf_write_index_table_segment(s);
         }
@@ -1776,16 +1783,18 @@ static int mxf_write_footer(AVFormatContext *s)
 {
     MXFContext *mxf = s->priv_data;
     AVIOContext *pb = s->pb;
+    int err;
 
     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
 
     mxf_write_klv_fill(s);
     mxf->footer_partition_offset = avio_tell(pb);
     if (mxf->edit_unit_byte_count) { // no need to repeat index
-        mxf_write_partition(s, 0, 0, footer_partition_key, 0);
+        if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)
+            return err;
     } else {
-        mxf_write_partition(s, 0, 2, footer_partition_key, 0);
-
+        if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)
+            return err;
         mxf_write_klv_fill(s);
         mxf_write_index_table_segment(s);
     }
@@ -1796,11 +1805,13 @@ static int mxf_write_footer(AVFormatContext *s)
     if (s->pb->seekable) {
         avio_seek(pb, 0, SEEK_SET);
         if (mxf->edit_unit_byte_count) {
-            mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
+            if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)
+                return err;
             mxf_write_klv_fill(s);
             mxf_write_index_table_segment(s);
         } else {
-            mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
+            if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)
+                return err;
         }
     }