From: Siarhei Siamashka Date: Mon, 16 Mar 2009 00:27:26 +0000 (+0200) Subject: sbc: ensure 16-byte buffer position alignment for 4 subbands encoding X-Git-Tag: android-x86-6.0-r1~89 X-Git-Url: http://git.osdn.net/view?p=android-x86%2Fexternal-bluetooth-sbc.git;a=commitdiff_plain;h=79cbcdea9af992e8b24bd711026a83bb23ff800a sbc: ensure 16-byte buffer position alignment for 4 subbands encoding 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. --- diff --git a/sbc/sbc.c b/sbc/sbc.c index 1510adc..b251d50 100644 --- a/sbc/sbc.c +++ b/sbc/sbc.c @@ -924,7 +924,7 @@ static void sbc_encoder_init(struct sbc_encoder_state *state, const struct sbc_frame *frame) { 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); } diff --git a/sbc/sbc_primitives.c b/sbc/sbc_primitives.c index 6b0be3f..2105280 100644 --- a/sbc/sbc_primitives.c +++ b/sbc/sbc_primitives.c @@ -231,12 +231,12 @@ static SBC_ALWAYS_INLINE int sbc_encoder_process_input_s4_internal( /* handle X buffer wraparound */ if (position < nsamples) { 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)); 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)); - position = SBC_X_BUFFER_SIZE - 36; + position = SBC_X_BUFFER_SIZE - 40; } #define PCM(i) (big_endian ? \