avformat/utils: add av_stream_add_side_data()

Functionally similar to av_packet_add_side_data(). Allows the use of an
already allocated buffer as stream side data.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

3 files changed, 39 insertions, 10 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index f9f4d725f5..7c696145ae 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -2049,6 +2049,21 @@ const AVClass *avformat_get_class(void);
 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c);
 
 /**
+ * Wrap an existing array as stream side data.
+ *
+ * @param st stream
+ * @param type side information type
+ * @param data the side data array. It must be allocated with the av_malloc()
+ *             family of functions. The ownership of the data is transferred to
+ *             st.
+ * @param size side information size
+ * @return zero on success, a negative AVERROR code on failure. On failure,
+ *         the stream is unchanged and the data remains owned by the caller.
+ */
+int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type,
+                            uint8_t *data, size_t size);
+
+/**
  * Allocate new information from stream.
  *
  * @param stream stream
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 56646464b6..19bb8bd420 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -5104,15 +5104,11 @@ uint8_t *av_stream_get_side_data(const AVStream *st,
     return NULL;
 }
 
-uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
-                                 int size)
+int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type,
+                            uint8_t *data, size_t size)
 {
     AVPacketSideData *sd, *tmp;
     int i;
-    uint8_t *data = av_malloc(size);
-
-    if (!data)
-        return NULL;
 
     for (i = 0; i < st->nb_side_data; i++) {
         sd = &st->side_data[i];
@@ -5121,14 +5117,13 @@ uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
             av_freep(&sd->data);
             sd->data = data;
             sd->size = size;
-            return sd->data;
+            return 0;
         }
     }
 
     tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
     if (!tmp) {
-        av_freep(&data);
-        return NULL;
+        return AVERROR(ENOMEM);
     }
 
     st->side_data = tmp;
@@ -5138,6 +5133,25 @@ uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
     sd->type = type;
     sd->data = data;
     sd->size = size;
+
+    return 0;
+}
+
+uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
+                                 int size)
+{
+    int ret;
+    uint8_t *data = av_malloc(size);
+
+    if (!data)
+        return NULL;
+
+    ret = av_stream_add_side_data(st, type, data, size);
+    if (ret < 0) {
+        av_freep(&data);
+        return NULL;
+    }
+
     return data;
 }
 
diff --git a/libavformat/version.h b/libavformat/version.h
index f75b400e80..24a7534a78 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,7 +32,7 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  57
-#define LIBAVFORMAT_VERSION_MINOR  57
+#define LIBAVFORMAT_VERSION_MINOR  58
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \