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aviobuf: Handle a NULL buffer in avio_close_dyn_buf 

This simplifies proper error handling in rtsp.c/rtspdec.c. When
broadcasting over RTSP in TCP mode, the AVIOContext is closed and
recreated for each sent packet, and if the recreation fails, we might
try to close a NULL buffer when freeing things at the end.

Previously, if recreating the buffer in rtspdec.c failed, this would
crash later due to trying to close a NULL buffer.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-10-30 19:09:30 +02:00
parent 28240a60c1
commit d07b51bf07
1 changed files with 5 additions and 0 deletions
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5
libavformat/aviobuf.c
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@ -964,6 +964,11 @@ int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
static const char padbuf[FF_INPUT_BUFFER_PADDING_SIZE] = {0};
int padding = 0;
if (!s) {
*pbuffer = NULL;
return 0;
}
/* don't attempt to pad fixed-size packet buffers */
if (!s->max_packet_size) {
avio_write(s, padbuf, sizeof(padbuf));