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Merge commit '49568851bf1700e3d9ea9cda29208d0df3c2c38b'

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* commit '49568851bf1700e3d9ea9cda29208d0df3c2c38b':
  shorten: Use a checked bytestream reader for the wave header

Conflicts:
	libavcodec/shorten.c

See: 5e9a56a035
Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-12 13:30:44 +02:00
commit a44d35d90f
1 changed files with 17 additions and 15 deletions
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32
libavcodec/shorten.c
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@ -209,34 +209,36 @@ static int decode_wave_header(AVCodecContext *avctx, const uint8_t *header,
{
int len, bps;
short wave_format;
const uint8_t *end= header + header_size;
GetByteContext gb;
if (bytestream_get_le32(&header) != MKTAG('R', 'I', 'F', 'F')) {
bytestream2_init(&gb, header, header_size);
if (bytestream2_get_le32(&gb) != MKTAG('R', 'I', 'F', 'F')) {
av_log(avctx, AV_LOG_ERROR, "missing RIFF tag\n");
return AVERROR_INVALIDDATA;
}
header += 4; /* chunk size */
bytestream2_skip(&gb, 4); /* chunk size */
if (bytestream_get_le32(&header) != MKTAG('W', 'A', 'V', 'E')) {
if (bytestream2_get_le32(&gb) != MKTAG('W', 'A', 'V', 'E')) {
av_log(avctx, AV_LOG_ERROR, "missing WAVE tag\n");
return AVERROR_INVALIDDATA;
}
while (bytestream_get_le32(&header) != MKTAG('f', 'm', 't', ' ')) {
len = bytestream_get_le32(&header);
if (len<0 || end - header - 8 < len)
while (bytestream2_get_le32(&gb) != MKTAG('f', 'm', 't', ' ')) {
len = bytestream2_get_le32(&gb);
if (len<0 || bytestream2_get_bytes_left(&gb) - 8 < len)
return AVERROR_INVALIDDATA;
header += len;
bytestream2_skip(&gb, len);
}
len = bytestream_get_le32(&header);
len = bytestream2_get_le32(&gb);
if (len < 16) {
av_log(avctx, AV_LOG_ERROR, "fmt chunk was too short\n");
return AVERROR_INVALIDDATA;
}
wave_format = bytestream_get_le16(&header);
wave_format = bytestream2_get_le16(&gb);
switch (wave_format) {
case WAVE_FORMAT_PCM:
@ -246,11 +248,11 @@ static int decode_wave_header(AVCodecContext *avctx, const uint8_t *header,
return AVERROR(ENOSYS);
}
header += 2; // skip channels (already got from shorten header)
avctx->sample_rate = bytestream_get_le32(&header);
header += 4; // skip bit rate (represents original uncompressed bit rate)
header += 2; // skip block align (not needed)
bps = bytestream_get_le16(&header);
bytestream2_skip(&gb, 2); // skip channels (already got from shorten header)
avctx->sample_rate = bytestream2_get_le32(&gb);
bytestream2_skip(&gb, 4); // skip bit rate (represents original uncompressed bit rate)
bytestream2_skip(&gb, 2); // skip block align (not needed)
bps = bytestream2_get_le16(&gb);
avctx->bits_per_coded_sample = bps;
if (bps != 16 && bps != 8) {