diff options
| -rw-r--r-- | libavcodec/lsp.c | 4 | ||||
| -rw-r--r-- | libavcodec/lsp.h | 5 |
2 files changed, 8 insertions, 1 deletions
diff --git a/libavcodec/lsp.c b/libavcodec/lsp.c index 4209216..ffd2410 100644 --- a/libavcodec/lsp.c +++ b/libavcodec/lsp.c @@ -157,9 +157,11 @@ static void lsp2polyf(const double *lsp, double *f, int lp_half_order) void ff_acelp_lspd2lpc(const double *lsp, float *lpc, int lp_half_order) { - double pa[lp_half_order+1], qa[lp_half_order+1]; + double pa[MAX_LP_HALF_ORDER+1], qa[MAX_LP_HALF_ORDER+1]; float *lpc2 = lpc + (lp_half_order << 1) - 1; + assert(lp_half_order <= MAX_LP_HALF_ORDER); + lsp2polyf(lsp, pa, lp_half_order); lsp2polyf(lsp + 1, qa, lp_half_order); diff --git a/libavcodec/lsp.h b/libavcodec/lsp.h index 7201d50..18d9772 100644 --- a/libavcodec/lsp.h +++ b/libavcodec/lsp.h @@ -80,11 +80,16 @@ void ff_acelp_lsp2lpc(int16_t* lp, const int16_t* lsp, int lp_half_order); */ void ff_acelp_lp_decode(int16_t* lp_1st, int16_t* lp_2nd, const int16_t* lsp_2nd, const int16_t* lsp_prev, int lp_order); + +#define MAX_LP_HALF_ORDER 8 + /** * Reconstructs LPC coefficients from the line spectral pair frequencies. * * @param lsp line spectral pairs in cosine domain * @param lpc linear predictive coding coefficients + * @param lp_half_order half the number of the amount of LPCs to be + * reconstructed, need to be smaller or equal to MAX_LP_HALF_ORDER * * @note buffers should have a minimux size of 2*lp_half_order elements. * |
