---
libavformat/avio_internal.h | 7 +++++++
libavformat/aviobuf.c | 8 ++++++++
2 files changed, 15 insertions(+)
diff --git a/libavformat/avio_internal.h b/libavformat/avio_internal.h
index c8630ab..aff5564 100644
--- a/libavformat/avio_internal.h
+++ b/libavformat/avio_internal.h
@@ -85,6 +85,13 @@ int ffio_rewind_with_probe_data(AVIOContext *s, unsigned
char *buf, int buf_size
uint64_t ffio_read_varlen(AVIOContext *bc);
+/**
+ * Read size bytes from AVIOContext into buf.
+ * Check that exactly size bytes have been read.
+ * @return number of bytes read or AVERROR
+ */
+int ffio_read_size(AVIOContext *s, unsigned char *buf, int size);
+
/** @warning must be called before any I/O */
int ffio_set_buf_size(AVIOContext *s, int buf_size);
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 59f807c..d3e3452 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -496,6 +496,14 @@ int avio_read(AVIOContext *s, unsigned char *buf, int size)
return size1 - size;
}
+int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
+{
+ int ret = avio_read(s, buf, size);
+ if (ret != size)
+ return AVERROR_INVALIDDATA;
+ return ret;
+}
+
int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const
unsigned char **data)
{
if (s->buf_end - s->buf_ptr >= size && !s->write_flag) {
--
1.9.5 (Apple Git-50.3)
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