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Set restrictions on packet_size, as per ISO-11172 / H-222 specifications

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(max packet size should fit in 13 bits as a kB value, so 1<<23, plus the
header which is 10 bytes), and as per mpegenc.c internal assumptions
(min packet size is 20 bytes). See "[PATCH] make packet_size in
AVFormatContext unsigned" thread.

Originally committed as revision 19215 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2009-06-17 19:04:02 +00:00
parent fa8c408b26
commit f4ca612fbd
1 changed files with 7 additions and 2 deletions
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9
libavformat/mpegenc.c
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@ -304,9 +304,14 @@ static int mpeg_mux_init(AVFormatContext *ctx)
(CONFIG_MPEG2SVCD_MUXER && ctx->oformat == &mpeg2svcd_muxer));
s->is_dvd = (CONFIG_MPEG2DVD_MUXER && ctx->oformat == &mpeg2dvd_muxer);
if(ctx->packet_size)
if(ctx->packet_size) {
if (ctx->packet_size < 20 || ctx->packet_size > (1 << 23) + 10) {
av_log(ctx, AV_LOG_ERROR, "Invalid packet size %d\n",
ctx->packet_size);
goto fail;
}
s->packet_size = ctx->packet_size;
else
} else
s->packet_size = 2048;
s->vcd_padding_bytes_written = 0;