Module: libav Branch: release/0.8 Commit: 82776caf7993221719eefbe576f851c7e52dfef9
Author: Andreas Cadhalpun <[email protected]> Committer: Vittorio Giovara <[email protected]> Date: Mon Mar 2 16:52:26 2015 +0100 rmenc: limit packet size The chunk size is limited to UINT16_MAX (written by avio_wb16), so make sure that the packet size is not too large. Such large frames need to be split into slices smaller than 64 kB, but that is currently supported neither by the rv10/rv20 encoders nor the rm muxer. Signed-off-by: Andreas Cadhalpun <[email protected]> Signed-off-by: Anton Khirnov <[email protected]> Signed-off-by: Vittorio Giovara <[email protected]> --- libavformat/rmenc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libavformat/rmenc.c b/libavformat/rmenc.c index 0312d16..94be94a 100644 --- a/libavformat/rmenc.c +++ b/libavformat/rmenc.c @@ -44,6 +44,10 @@ typedef struct { /* in ms */ #define BUFFER_DURATION 0 +/* the header needs at most 7 + 4 + 12 B */ +#define MAX_HEADER_SIZE (7 + 4 + 12) +/* UINT16_MAX is the maximal chunk size */ +#define MAX_PACKET_SIZE (UINT16_MAX - MAX_HEADER_SIZE) static void put_str(AVIOContext *s, const char *tag) @@ -387,6 +391,10 @@ static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int /* Well, I spent some time finding the meaning of these bits. I am not sure I understood everything, but it works !! */ #if 1 + if (size > MAX_PACKET_SIZE) { + av_log_missing_feature(s, "Muxing packets larger than 64 kB", 0); + return AVERROR(ENOSYS); + } write_packet_header(s, stream, size + 7 + (size >= 0x4000)*4, key_frame); /* bit 7: '1' if final packet of a frame converted in several packets */ avio_w8(pb, 0x81); _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
