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sbc: ensure 16-byte buffer position alignment for 4 subbands encoding

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Buffer position in X array was not always 16-bytes aligned.
Strict 16-byte alignment is strictly required for powerpc altivec
simd optimizations because altivec does not have support for
unaligned vector loads at all.
This commit is contained in:
Siarhei Siamashka 2011-03-14 15:01:19 -03:00 • committed by Luiz Augusto von Dentz
parent e4eb467010
commit 4d2f0daba1
2 changed files with 4 additions and 4 deletions
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2
src/modules/bluetooth/sbc/sbc.c
View file

@ -924,7 +924,7 @@ static void sbc_encoder_init(struct sbc_encoder_state *state,
const struct sbc_frame *frame) const struct sbc_frame *frame)
{ {
memset(&state->X, 0, sizeof(state->X)); memset(&state->X, 0, sizeof(state->X));
state->position = SBC_X_BUFFER_SIZE - frame->subbands * 9; state->position = (SBC_X_BUFFER_SIZE - frame->subbands * 9) & ~7;
sbc_init_primitives(state); sbc_init_primitives(state);
} }

6
src/modules/bluetooth/sbc/sbc_primitives.c
View file

@ -231,12 +231,12 @@ static SBC_ALWAYS_INLINE int sbc_encoder_process_input_s4_internal(
/* handle X buffer wraparound */ /* handle X buffer wraparound */
if (position < nsamples) { if (position < nsamples) {
if (nchannels > 0) if (nchannels > 0)
memcpy(&X[0][SBC_X_BUFFER_SIZE - 36], &X[0][position], memcpy(&X[0][SBC_X_BUFFER_SIZE - 40], &X[0][position],
36 * sizeof(int16_t)); 36 * sizeof(int16_t));
if (nchannels > 1) if (nchannels > 1)
memcpy(&X[1][SBC_X_BUFFER_SIZE - 36], &X[1][position], memcpy(&X[1][SBC_X_BUFFER_SIZE - 40], &X[1][position],
36 * sizeof(int16_t)); 36 * sizeof(int16_t));
position = SBC_X_BUFFER_SIZE - 36; position = SBC_X_BUFFER_SIZE - 40;
} }
#define PCM(i) (big_endian ? \ #define PCM(i) (big_endian ? \