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[flac] Update FLAC to 1.3.3
[timidity41/timidity41.git] / FLAC / src / lpc.c
diff --git a/FLAC/src/lpc.c b/FLAC/src/lpc.c
index 531247b..0673895 100644 (file)
--- a/FLAC/src/lpc.c
+++ b/FLAC/src/lpc.c
@@ -42,7 +42,7 @@
 #include "private/bitmath.h"
 #include "private/lpc.h"
 #include "private/macros.h"
-#if defined DEBUG || defined FLAC__OVERFLOW_DETECT || defined FLAC__OVERFLOW_DETECT_VERBOSE
+#if !defined(NDEBUG) || defined FLAC__OVERFLOW_DETECT || defined FLAC__OVERFLOW_DETECT_VERBOSE
 #include <stdio.h>
 #endif
 
@@ -63,19 +63,19 @@ static inline long int lround(double x) {
 /* If this fails, we are in the presence of a mid 90's compiler, move along... */
 #endif
 
-void FLAC__lpc_window_data(const FLAC__int32 in[], const FLAC__real window[], FLAC__real out[], unsigned data_len)
+void FLAC__lpc_window_data(const FLAC__int32 in[], const FLAC__real window[], FLAC__real out[], uint32_t data_len)
 {
-       unsigned i;
+       uint32_t i;
        for(i = 0; i < data_len; i++)
                out[i] = in[i] * window[i];
 }
 
-void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
+void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], uint32_t data_len, uint32_t lag, FLAC__real autoc[])
 {
        /* a readable, but slower, version */
 #if 0
        FLAC__real d;
-       unsigned i;
+       uint32_t i;
 
        FLAC__ASSERT(lag > 0);
        FLAC__ASSERT(lag <= data_len);
@@ -99,8 +99,8 @@ void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], unsigned data_le
         * ('data_len' is usually much larger than 'lag')
         */
        FLAC__real d;
-       unsigned sample, coeff;
-       const unsigned limit = data_len - lag;
+       uint32_t sample, coeff;
+       const uint32_t limit = data_len - lag;
 
        FLAC__ASSERT(lag > 0);
        FLAC__ASSERT(lag <= data_len);
@@ -119,9 +119,9 @@ void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], unsigned data_le
        }
 }
 
-void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], unsigned *max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], double error[])
+void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], uint32_t *max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], double error[])
 {
-       unsigned i, j;
+       uint32_t i, j;
        double r, err, lpc[FLAC__MAX_LPC_ORDER];
 
        FLAC__ASSERT(0 != max_order);
@@ -163,9 +163,9 @@ void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], unsigned *max_o
        }
 }
 
-int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], unsigned order, unsigned precision, FLAC__int32 qlp_coeff[], int *shift)
+int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], uint32_t order, uint32_t precision, FLAC__int32 qlp_coeff[], int *shift)
 {
-       unsigned i;
+       uint32_t i;
        double cmax;
        FLAC__int32 qmax, qmin;
 
@@ -234,7 +234,7 @@ int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], unsigned order,
                const int nshift = -(*shift);
                double error = 0.0;
                FLAC__int32 q;
-#ifdef DEBUG
+#ifndef NDEBUG
                fprintf(stderr,"FLAC__lpc_quantize_coefficients: negative shift=%d order=%u cmax=%f\n", *shift, order, cmax);
 #endif
                for(i = 0; i < order; i++) {
@@ -264,11 +264,11 @@ int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], unsigned order,
 #pragma warning ( disable : 4028 )
 #endif
 
-void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 * flac_restrict data, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict residual)
+void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 * flac_restrict data, uint32_t data_len, const FLAC__int32 * flac_restrict qlp_coeff, uint32_t order, int lp_quantization, FLAC__int32 * flac_restrict residual)
 #if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
 {
        FLAC__int64 sumo;
-       unsigned i, j;
+       uint32_t i, j;
        FLAC__int32 sum;
        const FLAC__int32 *history;
 
@@ -486,25 +486,25 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 * flac_r
                for(i = 0; i < (int)data_len; i++) {
                        sum = 0;
                        switch(order) {
-                               case 32: sum += qlp_coeff[31] * data[i-32];
-                               case 31: sum += qlp_coeff[30] * data[i-31];
-                               case 30: sum += qlp_coeff[29] * data[i-30];
-                               case 29: sum += qlp_coeff[28] * data[i-29];
-                               case 28: sum += qlp_coeff[27] * data[i-28];
-                               case 27: sum += qlp_coeff[26] * data[i-27];
-                               case 26: sum += qlp_coeff[25] * data[i-26];
-                               case 25: sum += qlp_coeff[24] * data[i-25];
-                               case 24: sum += qlp_coeff[23] * data[i-24];
-                               case 23: sum += qlp_coeff[22] * data[i-23];
-                               case 22: sum += qlp_coeff[21] * data[i-22];
-                               case 21: sum += qlp_coeff[20] * data[i-21];
-                               case 20: sum += qlp_coeff[19] * data[i-20];
-                               case 19: sum += qlp_coeff[18] * data[i-19];
-                               case 18: sum += qlp_coeff[17] * data[i-18];
-                               case 17: sum += qlp_coeff[16] * data[i-17];
-                               case 16: sum += qlp_coeff[15] * data[i-16];
-                               case 15: sum += qlp_coeff[14] * data[i-15];
-                               case 14: sum += qlp_coeff[13] * data[i-14];
+                               case 32: sum += qlp_coeff[31] * data[i-32]; /* Falls through. */
+                               case 31: sum += qlp_coeff[30] * data[i-31]; /* Falls through. */
+                               case 30: sum += qlp_coeff[29] * data[i-30]; /* Falls through. */
+                               case 29: sum += qlp_coeff[28] * data[i-29]; /* Falls through. */
+                               case 28: sum += qlp_coeff[27] * data[i-28]; /* Falls through. */
+                               case 27: sum += qlp_coeff[26] * data[i-27]; /* Falls through. */
+                               case 26: sum += qlp_coeff[25] * data[i-26]; /* Falls through. */
+                               case 25: sum += qlp_coeff[24] * data[i-25]; /* Falls through. */
+                               case 24: sum += qlp_coeff[23] * data[i-24]; /* Falls through. */
+                               case 23: sum += qlp_coeff[22] * data[i-23]; /* Falls through. */
+                               case 22: sum += qlp_coeff[21] * data[i-22]; /* Falls through. */
+                               case 21: sum += qlp_coeff[20] * data[i-21]; /* Falls through. */
+                               case 20: sum += qlp_coeff[19] * data[i-20]; /* Falls through. */
+                               case 19: sum += qlp_coeff[18] * data[i-19]; /* Falls through. */
+                               case 18: sum += qlp_coeff[17] * data[i-18]; /* Falls through. */
+                               case 17: sum += qlp_coeff[16] * data[i-17]; /* Falls through. */
+                               case 16: sum += qlp_coeff[15] * data[i-16]; /* Falls through. */
+                               case 15: sum += qlp_coeff[14] * data[i-15]; /* Falls through. */
+                               case 14: sum += qlp_coeff[13] * data[i-14]; /* Falls through. */
                                case 13: sum += qlp_coeff[12] * data[i-13];
                                         sum += qlp_coeff[11] * data[i-12];
                                         sum += qlp_coeff[10] * data[i-11];
@@ -525,10 +525,10 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 * flac_r
 }
 #endif
 
-void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 * flac_restrict data, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict residual)
+void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 * flac_restrict data, uint32_t data_len, const FLAC__int32 * flac_restrict qlp_coeff, uint32_t order, int lp_quantization, FLAC__int32 * flac_restrict residual)
 #if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
 {
-       unsigned i, j;
+       uint32_t i, j;
        FLAC__int64 sum;
        const FLAC__int32 *history;
 
@@ -740,25 +740,25 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 * f
                for(i = 0; i < (int)data_len; i++) {
                        sum = 0;
                        switch(order) {
-                               case 32: sum += qlp_coeff[31] * (FLAC__int64)data[i-32];
-                               case 31: sum += qlp_coeff[30] * (FLAC__int64)data[i-31];
-                               case 30: sum += qlp_coeff[29] * (FLAC__int64)data[i-30];
-                               case 29: sum += qlp_coeff[28] * (FLAC__int64)data[i-29];
-                               case 28: sum += qlp_coeff[27] * (FLAC__int64)data[i-28];
-                               case 27: sum += qlp_coeff[26] * (FLAC__int64)data[i-27];
-                               case 26: sum += qlp_coeff[25] * (FLAC__int64)data[i-26];
-                               case 25: sum += qlp_coeff[24] * (FLAC__int64)data[i-25];
-                               case 24: sum += qlp_coeff[23] * (FLAC__int64)data[i-24];
-                               case 23: sum += qlp_coeff[22] * (FLAC__int64)data[i-23];
-                               case 22: sum += qlp_coeff[21] * (FLAC__int64)data[i-22];
-                               case 21: sum += qlp_coeff[20] * (FLAC__int64)data[i-21];
-                               case 20: sum += qlp_coeff[19] * (FLAC__int64)data[i-20];
-                               case 19: sum += qlp_coeff[18] * (FLAC__int64)data[i-19];
-                               case 18: sum += qlp_coeff[17] * (FLAC__int64)data[i-18];
-                               case 17: sum += qlp_coeff[16] * (FLAC__int64)data[i-17];
-                               case 16: sum += qlp_coeff[15] * (FLAC__int64)data[i-16];
-                               case 15: sum += qlp_coeff[14] * (FLAC__int64)data[i-15];
-                               case 14: sum += qlp_coeff[13] * (FLAC__int64)data[i-14];
+                               case 32: sum += qlp_coeff[31] * (FLAC__int64)data[i-32]; /* Falls through. */
+                               case 31: sum += qlp_coeff[30] * (FLAC__int64)data[i-31]; /* Falls through. */
+                               case 30: sum += qlp_coeff[29] * (FLAC__int64)data[i-30]; /* Falls through. */
+                               case 29: sum += qlp_coeff[28] * (FLAC__int64)data[i-29]; /* Falls through. */
+                               case 28: sum += qlp_coeff[27] * (FLAC__int64)data[i-28]; /* Falls through. */
+                               case 27: sum += qlp_coeff[26] * (FLAC__int64)data[i-27]; /* Falls through. */
+                               case 26: sum += qlp_coeff[25] * (FLAC__int64)data[i-26]; /* Falls through. */
+                               case 25: sum += qlp_coeff[24] * (FLAC__int64)data[i-25]; /* Falls through. */
+                               case 24: sum += qlp_coeff[23] * (FLAC__int64)data[i-24]; /* Falls through. */
+                               case 23: sum += qlp_coeff[22] * (FLAC__int64)data[i-23]; /* Falls through. */
+                               case 22: sum += qlp_coeff[21] * (FLAC__int64)data[i-22]; /* Falls through. */
+                               case 21: sum += qlp_coeff[20] * (FLAC__int64)data[i-21]; /* Falls through. */
+                               case 20: sum += qlp_coeff[19] * (FLAC__int64)data[i-20]; /* Falls through. */
+                               case 19: sum += qlp_coeff[18] * (FLAC__int64)data[i-19]; /* Falls through. */
+                               case 18: sum += qlp_coeff[17] * (FLAC__int64)data[i-18]; /* Falls through. */
+                               case 17: sum += qlp_coeff[16] * (FLAC__int64)data[i-17]; /* Falls through. */
+                               case 16: sum += qlp_coeff[15] * (FLAC__int64)data[i-16]; /* Falls through. */
+                               case 15: sum += qlp_coeff[14] * (FLAC__int64)data[i-15]; /* Falls through. */
+                               case 14: sum += qlp_coeff[13] * (FLAC__int64)data[i-14]; /* Falls through. */
                                case 13: sum += qlp_coeff[12] * (FLAC__int64)data[i-13];
                                         sum += qlp_coeff[11] * (FLAC__int64)data[i-12];
                                         sum += qlp_coeff[10] * (FLAC__int64)data[i-11];
@@ -781,11 +781,11 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 * f
 
 #endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
 
-void FLAC__lpc_restore_signal(const FLAC__int32 * flac_restrict residual, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict data)
+void FLAC__lpc_restore_signal(const FLAC__int32 * flac_restrict residual, uint32_t data_len, const FLAC__int32 * flac_restrict qlp_coeff, uint32_t order, int lp_quantization, FLAC__int32 * flac_restrict data)
 #if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
 {
        FLAC__int64 sumo;
-       unsigned i, j;
+       uint32_t i, j;
        FLAC__int32 sum;
        const FLAC__int32 *r = residual, *history;
 
@@ -1003,25 +1003,25 @@ void FLAC__lpc_restore_signal(const FLAC__int32 * flac_restrict residual, unsign
                for(i = 0; i < (int)data_len; i++) {
                        sum = 0;
                        switch(order) {
-                               case 32: sum += qlp_coeff[31] * data[i-32];
-                               case 31: sum += qlp_coeff[30] * data[i-31];
-                               case 30: sum += qlp_coeff[29] * data[i-30];
-                               case 29: sum += qlp_coeff[28] * data[i-29];
-                               case 28: sum += qlp_coeff[27] * data[i-28];
-                               case 27: sum += qlp_coeff[26] * data[i-27];
-                               case 26: sum += qlp_coeff[25] * data[i-26];
-                               case 25: sum += qlp_coeff[24] * data[i-25];
-                               case 24: sum += qlp_coeff[23] * data[i-24];
-                               case 23: sum += qlp_coeff[22] * data[i-23];
-                               case 22: sum += qlp_coeff[21] * data[i-22];
-                               case 21: sum += qlp_coeff[20] * data[i-21];
-                               case 20: sum += qlp_coeff[19] * data[i-20];
-                               case 19: sum += qlp_coeff[18] * data[i-19];
-                               case 18: sum += qlp_coeff[17] * data[i-18];
-                               case 17: sum += qlp_coeff[16] * data[i-17];
-                               case 16: sum += qlp_coeff[15] * data[i-16];
-                               case 15: sum += qlp_coeff[14] * data[i-15];
-                               case 14: sum += qlp_coeff[13] * data[i-14];
+                               case 32: sum += qlp_coeff[31] * data[i-32]; /* Falls through. */
+                               case 31: sum += qlp_coeff[30] * data[i-31]; /* Falls through. */
+                               case 30: sum += qlp_coeff[29] * data[i-30]; /* Falls through. */
+                               case 29: sum += qlp_coeff[28] * data[i-29]; /* Falls through. */
+                               case 28: sum += qlp_coeff[27] * data[i-28]; /* Falls through. */
+                               case 27: sum += qlp_coeff[26] * data[i-27]; /* Falls through. */
+                               case 26: sum += qlp_coeff[25] * data[i-26]; /* Falls through. */
+                               case 25: sum += qlp_coeff[24] * data[i-25]; /* Falls through. */
+                               case 24: sum += qlp_coeff[23] * data[i-24]; /* Falls through. */
+                               case 23: sum += qlp_coeff[22] * data[i-23]; /* Falls through. */
+                               case 22: sum += qlp_coeff[21] * data[i-22]; /* Falls through. */
+                               case 21: sum += qlp_coeff[20] * data[i-21]; /* Falls through. */
+                               case 20: sum += qlp_coeff[19] * data[i-20]; /* Falls through. */
+                               case 19: sum += qlp_coeff[18] * data[i-19]; /* Falls through. */
+                               case 18: sum += qlp_coeff[17] * data[i-18]; /* Falls through. */
+                               case 17: sum += qlp_coeff[16] * data[i-17]; /* Falls through. */
+                               case 16: sum += qlp_coeff[15] * data[i-16]; /* Falls through. */
+                               case 15: sum += qlp_coeff[14] * data[i-15]; /* Falls through. */
+                               case 14: sum += qlp_coeff[13] * data[i-14]; /* Falls through. */
                                case 13: sum += qlp_coeff[12] * data[i-13];
                                         sum += qlp_coeff[11] * data[i-12];
                                         sum += qlp_coeff[10] * data[i-11];
@@ -1042,10 +1042,10 @@ void FLAC__lpc_restore_signal(const FLAC__int32 * flac_restrict residual, unsign
 }
 #endif
 
-void FLAC__lpc_restore_signal_wide(const FLAC__int32 * flac_restrict residual, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict data)
+void FLAC__lpc_restore_signal_wide(const FLAC__int32 * flac_restrict residual, uint32_t data_len, const FLAC__int32 * flac_restrict qlp_coeff, uint32_t order, int lp_quantization, FLAC__int32 * flac_restrict data)
 #if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
 {
-       unsigned i, j;
+       uint32_t i, j;
        FLAC__int64 sum;
        const FLAC__int32 *r = residual, *history;
 
@@ -1257,25 +1257,25 @@ void FLAC__lpc_restore_signal_wide(const FLAC__int32 * flac_restrict residual, u
                for(i = 0; i < (int)data_len; i++) {
                        sum = 0;
                        switch(order) {
-                               case 32: sum += qlp_coeff[31] * (FLAC__int64)data[i-32];
-                               case 31: sum += qlp_coeff[30] * (FLAC__int64)data[i-31];
-                               case 30: sum += qlp_coeff[29] * (FLAC__int64)data[i-30];
-                               case 29: sum += qlp_coeff[28] * (FLAC__int64)data[i-29];
-                               case 28: sum += qlp_coeff[27] * (FLAC__int64)data[i-28];
-                               case 27: sum += qlp_coeff[26] * (FLAC__int64)data[i-27];
-                               case 26: sum += qlp_coeff[25] * (FLAC__int64)data[i-26];
-                               case 25: sum += qlp_coeff[24] * (FLAC__int64)data[i-25];
-                               case 24: sum += qlp_coeff[23] * (FLAC__int64)data[i-24];
-                               case 23: sum += qlp_coeff[22] * (FLAC__int64)data[i-23];
-                               case 22: sum += qlp_coeff[21] * (FLAC__int64)data[i-22];
-                               case 21: sum += qlp_coeff[20] * (FLAC__int64)data[i-21];
-                               case 20: sum += qlp_coeff[19] * (FLAC__int64)data[i-20];
-                               case 19: sum += qlp_coeff[18] * (FLAC__int64)data[i-19];
-                               case 18: sum += qlp_coeff[17] * (FLAC__int64)data[i-18];
-                               case 17: sum += qlp_coeff[16] * (FLAC__int64)data[i-17];
-                               case 16: sum += qlp_coeff[15] * (FLAC__int64)data[i-16];
-                               case 15: sum += qlp_coeff[14] * (FLAC__int64)data[i-15];
-                               case 14: sum += qlp_coeff[13] * (FLAC__int64)data[i-14];
+                               case 32: sum += qlp_coeff[31] * (FLAC__int64)data[i-32]; /* Falls through. */
+                               case 31: sum += qlp_coeff[30] * (FLAC__int64)data[i-31]; /* Falls through. */
+                               case 30: sum += qlp_coeff[29] * (FLAC__int64)data[i-30]; /* Falls through. */
+                               case 29: sum += qlp_coeff[28] * (FLAC__int64)data[i-29]; /* Falls through. */
+                               case 28: sum += qlp_coeff[27] * (FLAC__int64)data[i-28]; /* Falls through. */
+                               case 27: sum += qlp_coeff[26] * (FLAC__int64)data[i-27]; /* Falls through. */
+                               case 26: sum += qlp_coeff[25] * (FLAC__int64)data[i-26]; /* Falls through. */
+                               case 25: sum += qlp_coeff[24] * (FLAC__int64)data[i-25]; /* Falls through. */
+                               case 24: sum += qlp_coeff[23] * (FLAC__int64)data[i-24]; /* Falls through. */
+                               case 23: sum += qlp_coeff[22] * (FLAC__int64)data[i-23]; /* Falls through. */
+                               case 22: sum += qlp_coeff[21] * (FLAC__int64)data[i-22]; /* Falls through. */
+                               case 21: sum += qlp_coeff[20] * (FLAC__int64)data[i-21]; /* Falls through. */
+                               case 20: sum += qlp_coeff[19] * (FLAC__int64)data[i-20]; /* Falls through. */
+                               case 19: sum += qlp_coeff[18] * (FLAC__int64)data[i-19]; /* Falls through. */
+                               case 18: sum += qlp_coeff[17] * (FLAC__int64)data[i-18]; /* Falls through. */
+                               case 17: sum += qlp_coeff[16] * (FLAC__int64)data[i-17]; /* Falls through. */
+                               case 16: sum += qlp_coeff[15] * (FLAC__int64)data[i-16]; /* Falls through. */
+                               case 15: sum += qlp_coeff[14] * (FLAC__int64)data[i-15]; /* Falls through. */
+                               case 14: sum += qlp_coeff[13] * (FLAC__int64)data[i-14]; /* Falls through. */
                                case 13: sum += qlp_coeff[12] * (FLAC__int64)data[i-13];
                                         sum += qlp_coeff[11] * (FLAC__int64)data[i-12];
                                         sum += qlp_coeff[10] * (FLAC__int64)data[i-11];
@@ -1302,7 +1302,7 @@ void FLAC__lpc_restore_signal_wide(const FLAC__int32 * flac_restrict residual, u
 
 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 
-double FLAC__lpc_compute_expected_bits_per_residual_sample(double lpc_error, unsigned total_samples)
+double FLAC__lpc_compute_expected_bits_per_residual_sample(double lpc_error, uint32_t total_samples)
 {
        double error_scale;
 
@@ -1330,9 +1330,9 @@ double FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale(doub
        }
 }
 
-unsigned FLAC__lpc_compute_best_order(const double lpc_error[], unsigned max_order, unsigned total_samples, unsigned overhead_bits_per_order)
+uint32_t FLAC__lpc_compute_best_order(const double lpc_error[], uint32_t max_order, uint32_t total_samples, uint32_t overhead_bits_per_order)
 {
-       unsigned order, indx, best_index; /* 'index' the index into lpc_error; index==order-1 since lpc_error[0] is for order==1, lpc_error[1] is for order==2, etc */
+       uint32_t order, indx, best_index; /* 'index' the index into lpc_error; index==order-1 since lpc_error[0] is for order==1, lpc_error[1] is for order==2, etc */
        double bits, best_bits, error_scale;
 
        FLAC__ASSERT(max_order > 0);
@@ -1341,7 +1341,7 @@ unsigned FLAC__lpc_compute_best_order(const double lpc_error[], unsigned max_ord
        error_scale = 0.5 / (double)total_samples;
 
        best_index = 0;
-       best_bits = (unsigned)(-1);
+       best_bits = (uint32_t)(-1);
 
        for(indx = 0, order = 1; indx < max_order; indx++, order++) {
                bits = FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale(lpc_error[indx], error_scale) * (double)(total_samples - order) + (double)(order * overhead_bits_per_order);
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