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adpcm: convert adpcm_sbpro to bytestream2.

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This commit is contained in:
Ronald S. Bultje 2012-03-17 15:38:10 -07:00
parent 834c81f4c5
commit 8afe2f9002
1 changed files with 17 additions and 14 deletions
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31
libavcodec/adpcm.c
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@ -1101,38 +1101,41 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
case CODEC_ID_ADPCM_SBPRO_2:
if (!c->status[0].step_index) {
/* the first byte is a raw sample */
*samples++ = 128 * (*src++ - 0x80);
*samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
if (st)
*samples++ = 128 * (*src++ - 0x80);
*samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
c->status[0].step_index = 1;
nb_samples--;
}
if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
for (n = nb_samples >> (1 - st); n > 0; n--) {
int byte = bytestream2_get_byteu(&gb);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
src[0] >> 4, 4, 0);
byte >> 4, 4, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
src[0] & 0x0F, 4, 0);
byte & 0x0F, 4, 0);
}
} else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
for (n = nb_samples / 3; n > 0; n--, src++) {
for (n = nb_samples / 3; n > 0; n--) {
int byte = bytestream2_get_byteu(&gb);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
src[0] >> 5 , 3, 0);
byte >> 5 , 3, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
(src[0] >> 2) & 0x07, 3, 0);
(byte >> 2) & 0x07, 3, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
src[0] & 0x03, 2, 0);
byte & 0x03, 2, 0);
}
} else {
for (n = nb_samples >> (2 - st); n > 0; n--, src++) {
for (n = nb_samples >> (2 - st); n > 0; n--) {
int byte = bytestream2_get_byteu(&gb);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
src[0] >> 6 , 2, 2);
byte >> 6 , 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
(src[0] >> 4) & 0x03, 2, 2);
(byte >> 4) & 0x03, 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
(src[0] >> 2) & 0x03, 2, 2);
(byte >> 2) & 0x03, 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
src[0] & 0x03, 2, 2);
byte & 0x03, 2, 2);
}
}
break;