From 4b0e0f31bf0f618a634dcfdca45e72cdfb0b48b5 Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Tue, 21 Aug 2012 12:29:11 -0400 Subject: lpc: fix alignment of windowed samples for odd maximum LPC order Fixes crash on x86 due to alignment requirements for w_data in lpc_apply_welch_window_sse2(). --- libavcodec/lpc.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) (limited to 'libavcodec/lpc.c') diff --git a/libavcodec/lpc.c b/libavcodec/lpc.c index 6ce5dde266..cc3ce44725 100644 --- a/libavcodec/lpc.c +++ b/libavcodec/lpc.c @@ -178,11 +178,9 @@ int ff_lpc_calc_coefs(LPCContext *s, } if (lpc_type == FF_LPC_TYPE_LEVINSON) { - double *windowed_samples = s->windowed_samples + max_order; + s->lpc_apply_welch_window(samples, blocksize, s->windowed_samples); - s->lpc_apply_welch_window(samples, blocksize, windowed_samples); - - s->lpc_compute_autocorr(windowed_samples, blocksize, max_order, autoc); + s->lpc_compute_autocorr(s->windowed_samples, blocksize, max_order, autoc); compute_lpc_coefs(autoc, max_order, &lpc[0][0], MAX_LPC_ORDER, 0, 1); @@ -248,10 +246,11 @@ av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order, s->lpc_type = lpc_type; if (lpc_type == FF_LPC_TYPE_LEVINSON) { - s->windowed_samples = av_mallocz((blocksize + max_order + 2) * - sizeof(*s->windowed_samples)); - if (!s->windowed_samples) + s->windowed_buffer = av_mallocz((blocksize + 2 + FFALIGN(max_order, 4)) * + sizeof(*s->windowed_samples)); + if (!s->windowed_buffer) return AVERROR(ENOMEM); + s->windowed_samples = s->windowed_buffer + FFALIGN(max_order, 4); } else { s->windowed_samples = NULL; } @@ -267,5 +266,5 @@ av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order, av_cold void ff_lpc_end(LPCContext *s) { - av_freep(&s->windowed_samples); + av_freep(&s->windowed_buffer); } -- cgit v1.2.3