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Fix handling of unaligned input buffers in libatrac.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22322 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Mohamed Tarek 2009-08-15 14:52:28 +00:00
parent 0fe4417da8
commit bd4fc82b3b
1 changed files with 5 additions and 10 deletions
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15
apps/codecs/libatrac/atrac3.c
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@ -178,11 +178,6 @@ static int decode_bytes(const uint8_t* inbuffer, uint8_t* out, int bytes){
for (i = 0; i < bytes/4; i++)
obuf[i] = c ^ buf[i];
if (off) {
DEBUGF("Offset of %d not handled, post sample on ffmpeg-dev.\n",off);
return off;
}
return off;
}
@ -698,7 +693,7 @@ static int decodeChannelSoundUnit (GetBitContext *gb, channel_unit *pSnd, int32_
* @param databuf the input data
*/
static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf)
static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf, int off)
{
int result, i;
int32_t *p1, *p2, *p3, *p4;
@ -766,7 +761,7 @@ static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf)
for (i=0 ; i<q->channels ; i++) {
/* Set the bitstream reader at the start of a channel sound unit. */
init_get_bits(&q->gb, databuf+((i*q->bytes_per_frame)/q->channels), (q->bits_per_frame)/q->channels);
init_get_bits(&q->gb, databuf+((i*q->bytes_per_frame)/q->channels)+off, (q->bits_per_frame)/q->channels);
result = decodeChannelSoundUnit(&q->gb, &q->pUnits[i], &q->outSamples[i*1024], i, q->codingMode);
if (result != 0)
@ -799,7 +794,7 @@ static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf)
int atrac3_decode_frame(RMContext *rmctx, ATRAC3Context *q,
void *data, int *data_size,
const uint8_t *buf, int buf_size) {
int result = 0, i;
int result = 0, off = 0, i;
const uint8_t* databuf;
int16_t* samples = data;
@ -808,13 +803,13 @@ int atrac3_decode_frame(RMContext *rmctx, ATRAC3Context *q,
/* Check if we need to descramble and what buffer to pass on. */
if (q->scrambled_stream) {
decode_bytes(buf, q->decoded_bytes_buffer, rmctx->block_align);
off = decode_bytes(buf, q->decoded_bytes_buffer, rmctx->block_align);
databuf = q->decoded_bytes_buffer;
} else {
databuf = buf;
}
result = decodeFrame(q, databuf);
result = decodeFrame(q, databuf, off);
if (result != 0) {
DEBUGF("Frame decoding error!\n");