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oma: Validate sample rates

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The sample rate index is 3 bits even if currently index 5, 6 and 7 are
not supported.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-03-30 09:46:06 +01:00
parent f2f57d1679
commit 0933fd1533
3 changed files with 15 additions and 6 deletions
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2
libavformat/oma.c
View File

@ -22,7 +22,7 @@
#include "oma.h"
#include "libavcodec/avcodec.h"
const uint16_t ff_oma_srate_tab[6] = { 320, 441, 480, 882, 960, 0 };
const uint16_t ff_oma_srate_tab[8] = { 320, 441, 480, 882, 960, 0 };
const AVCodecTag ff_oma_codec_tags[] = {
{ AV_CODEC_ID_ATRAC3, OMA_CODECID_ATRAC3 },

2
libavformat/oma.h
View File

@ -37,7 +37,7 @@ enum {
OMA_CODECID_WMA = 5,
};
extern const uint16_t ff_oma_srate_tab[6];
extern const uint16_t ff_oma_srate_tab[8];
extern const AVCodecTag ff_oma_codec_tags[];

17
libavformat/omadec.c
View File

@ -304,7 +304,11 @@ static int oma_read_header(AVFormatContext *s)
switch (buf[32]) {
case OMA_CODECID_ATRAC3:
samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7]*100;
samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
if (!samplerate) {
av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
return AVERROR_INVALIDDATA;
}
if (samplerate != 44100)
avpriv_request_sample(s, "Sample rate %d", samplerate);
@ -334,9 +338,14 @@ static int oma_read_header(AVFormatContext *s)
case OMA_CODECID_ATRAC3P:
st->codec->channels = (codec_params >> 10) & 7;
framesize = ((codec_params & 0x3FF) * 8) + 8;
st->codec->sample_rate = ff_oma_srate_tab[(codec_params >> 13) & 7]*100;
st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
if (!samplerate) {
av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
return AVERROR_INVALIDDATA;
}
st->codec->sample_rate = samplerate;
st->codec->bit_rate = samplerate * framesize * 8 / 1024;
avpriv_set_pts_info(st, 64, 1, samplerate);
av_log(s, AV_LOG_ERROR, "Unsupported codec ATRAC3+!\n");
break;
case OMA_CODECID_MP3: