avio: Introduce avio_read_to_bprint(avioctx, bp, max_size)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 18 insertions, 0 deletions

diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 738459e830..463d90a0d3 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -953,6 +953,24 @@ int64_t avio_seek_time(AVIOContext *s, int stream_index,
     return ret;
 }
 
+int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size)
+{
+    int ret;
+    char buf[1024];
+    while (max_size) {
+        ret = avio_read(h, buf, FFMIN(max_size, sizeof(buf)));
+        if (ret == AVERROR_EOF)
+            return 0;
+        if (ret <= 0)
+            return ret;
+        av_bprint_append_data(pb, buf, ret);
+        if (!av_bprint_is_complete(pb))
+            return AVERROR(ENOMEM);
+        max_size -= ret;
+    }
+    return 0;
+}
+
 /* output in a dynamic buffer */
 
 typedef struct DynBuffer {