#include <math.h>
#include <string.h>
#include <regex.h>
+#include <sys/select.h>
#include "para.h"
#include "error.h"
struct private_wmadec_data {
struct asf_header_info ahi;
struct getbit_context gb;
+ /** Whether to use the bit reservoir. */
int use_bit_reservoir;
+ /** Whether to use variable block length. */
int use_variable_block_len;
- int use_exp_vlc; ///< exponent coding: 0 = lsp, 1 = vlc + delta
- int use_noise_coding; ///< true if perceptual noise is added
+ /** Whether to use exponent coding. */
+ int use_exp_vlc;
+ /** Whether perceptual noise is added. */
+ int use_noise_coding;
int byte_offset_bits;
struct vlc exp_vlc;
int exponent_sizes[BLOCK_NB_SIZES];
uint16_t exponent_bands[BLOCK_NB_SIZES][25];
- int high_band_start[BLOCK_NB_SIZES]; ///< index of first coef in high band
- int coefs_start; ///< first coded coef
+ /** The index of the first coef in high band. */
+ int high_band_start[BLOCK_NB_SIZES];
+ int coefs_start;///< first coded coef
int coefs_end[BLOCK_NB_SIZES]; ///< max number of coded coefficients
int exponent_high_sizes[BLOCK_NB_SIZES];
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE];
#define VLCBITS 9
#define VLCMAX ((22 + VLCBITS - 1) / VLCBITS)
-DECLARE_ALIGNED(16, float, ff_sine_128[128]);
-DECLARE_ALIGNED(16, float, ff_sine_256[256]);
-DECLARE_ALIGNED(16, float, ff_sine_512[512]);
-DECLARE_ALIGNED(16, float, ff_sine_1024[1024]);
-DECLARE_ALIGNED(16, float, ff_sine_2048[2048]);
-DECLARE_ALIGNED(16, float, ff_sine_4096[4096]);
+#define SINE_WINDOW(x) float sine_ ## x[x] __aligned(16)
-static float *ff_sine_windows[6] = {
- ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024,
- ff_sine_2048, ff_sine_4096
+SINE_WINDOW(128);
+SINE_WINDOW(256);
+SINE_WINDOW(512);
+SINE_WINDOW(1024);
+SINE_WINDOW(2048);
+SINE_WINDOW(4096);
+
+static float *sine_windows[6] = {
+ sine_128, sine_256, sine_512, sine_1024, sine_2048, sine_4096
};
/* Generate a sine window. */
for (i = 0; i < pwd->nb_block_sizes; i++) {
int n;
n = 1 << (pwd->frame_len_bits - i);
- sine_window_init(ff_sine_windows[pwd->frame_len_bits - i - 7], n);
- pwd->windows[i] = ff_sine_windows[pwd->frame_len_bits - i - 7];
+ sine_window_init(sine_windows[pwd->frame_len_bits - i - 7], n);
+ pwd->windows[i] = sine_windows[pwd->frame_len_bits - i - 7];
}
pwd->reset_block_lengths = 1;
if (pwd->use_noise_coding) {
PARA_INFO_LOG("using noise coding\n");
init_vlc(&pwd->hgain_vlc, HGAINVLCBITS,
- sizeof(ff_wma_hgain_huffbits), ff_wma_hgain_huffbits,
- ff_wma_hgain_huffcodes, 2);
+ sizeof(wma_hgain_huffbits), wma_hgain_huffbits,
+ wma_hgain_huffcodes, 2);
}
if (pwd->use_exp_vlc) {
PARA_INFO_LOG("using exp_vlc\n");
init_vlc(&pwd->exp_vlc, EXPVLCBITS,
- sizeof(ff_wma_scale_huffbits), ff_wma_scale_huffbits,
- ff_wma_scale_huffcodes, 4);
+ sizeof(wma_scale_huffbits), wma_scale_huffbits,
+ wma_scale_huffcodes, 4);
} else {
PARA_INFO_LOG("using curve\n");
wma_lsp_to_curve_init(pwd, pwd->frame_len);
val = get_bits(&pwd->gb, 3);
else
val = get_bits(&pwd->gb, 4);
- lsp_coefs[i] = ff_wma_lsp_codebook[i][val];
+ lsp_coefs[i] = wma_lsp_codebook[i][val];
}
wma_lsp_to_curve(pwd, pwd->exponents[ch], &pwd->max_exponent[ch],
return 9;
}
+static int compute_high_band_values(struct private_wmadec_data *pwd,
+ int bsize, int nb_coefs[MAX_CHANNELS])
+{
+ int ch;
+
+ if (!pwd->use_noise_coding)
+ return 0;
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ int i, m, a;
+ if (!pwd->channel_coded[ch])
+ continue;
+ m = pwd->exponent_high_sizes[bsize];
+ for (i = 0; i < m; i++) {
+ a = get_bit(&pwd->gb);
+ pwd->high_band_coded[ch][i] = a;
+ if (!a)
+ continue;
+ nb_coefs[ch] -= pwd->exponent_high_bands[bsize][i];
+ }
+ }
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ int i, n, val;
+ if (!pwd->channel_coded[ch])
+ continue;
+ n = pwd->exponent_high_sizes[bsize];
+ val = (int)0x80000000;
+ for (i = 0; i < n; i++) {
+ if (!pwd->high_band_coded[ch][i])
+ continue;
+ if (val == (int)0x80000000)
+ val = get_bits(&pwd->gb, 7) - 19;
+ else {
+ int code = get_vlc(&pwd->gb,
+ pwd->hgain_vlc.table, HGAINVLCBITS,
+ HGAINMAX);
+ if (code < 0)
+ return -1;
+ val += code - 18;
+ }
+ pwd->high_band_values[ch][i] = val;
+ }
+ }
+ return 1;
+}
+
+static void compute_mdct_coefficients(struct private_wmadec_data *pwd,
+ int bsize, int total_gain, int nb_coefs[MAX_CHANNELS])
+{
+ int ch;
+ float mdct_norm = 1.0 / (pwd->block_len / 2);
+
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ int16_t *coefs1;
+ float *coefs, *exponents, mult, mult1, noise;
+ int i, j, n, n1, last_high_band, esize;
+ float exp_power[HIGH_BAND_MAX_SIZE];
+
+ if (!pwd->channel_coded[ch])
+ continue;
+ coefs1 = pwd->coefs1[ch];
+ exponents = pwd->exponents[ch];
+ esize = pwd->exponents_bsize[ch];
+ mult = pow(10, total_gain * 0.05) / pwd->max_exponent[ch];
+ mult *= mdct_norm;
+ coefs = pwd->coefs[ch];
+ if (!pwd->use_noise_coding) {
+ /* XXX: optimize more */
+ for (i = 0; i < pwd->coefs_start; i++)
+ *coefs++ = 0.0;
+ n = nb_coefs[ch];
+ for (i = 0; i < n; i++)
+ *coefs++ = coefs1[i] *
+ exponents[i << bsize >> esize] * mult;
+ n = pwd->block_len - pwd->coefs_end[bsize];
+ for (i = 0; i < n; i++)
+ *coefs++ = 0.0;
+ continue;
+ }
+ mult1 = mult;
+ /* very low freqs: noise */
+ for (i = 0; i < pwd->coefs_start; i++) {
+ *coefs++ = pwd->noise_table[pwd->noise_index] *
+ exponents[i << bsize >> esize] * mult1;
+ pwd->noise_index = (pwd->noise_index + 1) &
+ (NOISE_TAB_SIZE - 1);
+ }
+ n1 = pwd->exponent_high_sizes[bsize];
+ /* compute power of high bands */
+ exponents = pwd->exponents[ch] +
+ (pwd->high_band_start[bsize] << bsize);
+ last_high_band = 0; /* avoid warning */
+ for (j = 0; j < n1; j++) {
+ n = pwd->exponent_high_bands[
+ pwd->frame_len_bits - pwd->block_len_bits][j];
+ if (pwd->high_band_coded[ch][j]) {
+ float e2, val;
+ e2 = 0;
+ for (i = 0; i < n; i++) {
+ val = exponents[i << bsize >> esize];
+ e2 += val * val;
+ }
+ exp_power[j] = e2 / n;
+ last_high_band = j;
+ }
+ exponents += n << bsize;
+ }
+ /* main freqs and high freqs */
+ exponents = pwd->exponents[ch] + (pwd->coefs_start << bsize);
+ for (j = -1; j < n1; j++) {
+ if (j < 0)
+ n = pwd->high_band_start[bsize]
+ - pwd->coefs_start;
+ else
+ n = pwd->exponent_high_bands[pwd->frame_len_bits
+ - pwd->block_len_bits][j];
+ if (j >= 0 && pwd->high_band_coded[ch][j]) {
+ /* use noise with specified power */
+ mult1 = sqrt(exp_power[j]
+ / exp_power[last_high_band]);
+ /* XXX: use a table */
+ mult1 = mult1 * pow(10,
+ pwd->high_band_values[ch][j] * 0.05);
+ mult1 /= (pwd->max_exponent[ch] * pwd->noise_mult);
+ mult1 *= mdct_norm;
+ for (i = 0; i < n; i++) {
+ noise = pwd->noise_table[pwd->noise_index];
+ pwd->noise_index = (pwd->noise_index + 1)
+ & (NOISE_TAB_SIZE - 1);
+ *coefs++ = noise * exponents[
+ i << bsize >> esize] * mult1;
+ }
+ exponents += n << bsize;
+ } else {
+ /* coded values + small noise */
+ for (i = 0; i < n; i++) {
+ noise = pwd->noise_table[pwd->noise_index];
+ pwd->noise_index = (pwd->noise_index + 1)
+ & (NOISE_TAB_SIZE - 1);
+ *coefs++ = ((*coefs1++) + noise) *
+ exponents[i << bsize >> esize]
+ * mult;
+ }
+ exponents += n << bsize;
+ }
+ }
+ /* very high freqs: noise */
+ n = pwd->block_len - pwd->coefs_end[bsize];
+ mult1 = mult * exponents[((-1 << bsize)) >> esize];
+ for (i = 0; i < n; i++) {
+ *coefs++ = pwd->noise_table[pwd->noise_index] * mult1;
+ pwd->noise_index = (pwd->noise_index + 1)
+ & (NOISE_TAB_SIZE - 1);
+ }
+ }
+}
+
/**
* @return 0 if OK. 1 if last block of frame. return -1 if
* unrecorrable error.
int n, v, ch, code, bsize;
int coef_nb_bits, total_gain;
int nb_coefs[MAX_CHANNELS];
- float mdct_norm;
/* compute current block length */
if (pwd->use_variable_block_len) {
if (!v)
goto next;
- /* read total gain and extract corresponding number of bits for
- coef escape coding */
+ /*
+ * Read total gain and extract corresponding number of bits for coef
+ * escape coding.
+ */
total_gain = 1;
for (;;) {
int a = get_bits(&pwd->gb, 7);
for (ch = 0; ch < pwd->ahi.channels; ch++)
nb_coefs[ch] = n;
- /* complex coding */
- if (pwd->use_noise_coding) {
- for (ch = 0; ch < pwd->ahi.channels; ch++) {
- if (pwd->channel_coded[ch]) {
- int i, m, a;
- m = pwd->exponent_high_sizes[bsize];
- for (i = 0; i < m; i++) {
- a = get_bit(&pwd->gb);
- pwd->high_band_coded[ch][i] = a;
- /* if noise coding, the coefficients are not transmitted */
- if (a)
- nb_coefs[ch] -=
- pwd->
- exponent_high_bands[bsize]
- [i];
- }
- }
- }
- for (ch = 0; ch < pwd->ahi.channels; ch++) {
- if (pwd->channel_coded[ch]) {
- int i, val;
-
- n = pwd->exponent_high_sizes[bsize];
- val = (int) 0x80000000;
- for (i = 0; i < n; i++) {
- if (pwd->high_band_coded[ch][i]) {
- if (val == (int) 0x80000000) {
- val =
- get_bits(&pwd->gb,
- 7) - 19;
- } else {
- code =
- get_vlc(&pwd->gb,
- pwd->
- hgain_vlc.
- table,
- HGAINVLCBITS,
- HGAINMAX);
- if (code < 0)
- return -1;
- val += code - 18;
- }
- pwd->high_band_values[ch][i] =
- val;
- }
- }
- }
- }
- }
+ if (compute_high_band_values(pwd, bsize, nb_coefs) < 0)
+ return -1;
/* exponents can be reused in short blocks. */
if ((pwd->block_len_bits == pwd->frame_len_bits) || get_bit(&pwd->gb)) {
break;
}
}
-
- /* normalize */
- {
- int n4 = pwd->block_len / 2;
- mdct_norm = 1.0 / (float) n4;
- }
-
- /* finally compute the MDCT coefficients */
- for (ch = 0; ch < pwd->ahi.channels; ch++) {
- if (pwd->channel_coded[ch]) {
- int16_t *coefs1;
- float *coefs, *exponents, mult, mult1, noise;
- int i, j, n1, last_high_band, esize;
- float exp_power[HIGH_BAND_MAX_SIZE];
-
- coefs1 = pwd->coefs1[ch];
- exponents = pwd->exponents[ch];
- esize = pwd->exponents_bsize[ch];
- mult = pow(10, total_gain * 0.05) / pwd->max_exponent[ch];
- mult *= mdct_norm;
- coefs = pwd->coefs[ch];
- if (pwd->use_noise_coding) {
- mult1 = mult;
- /* very low freqs : noise */
- for (i = 0; i < pwd->coefs_start; i++) {
- *coefs++ =
- pwd->noise_table[pwd->noise_index] *
- exponents[i << bsize >> esize] *
- mult1;
- pwd->noise_index =
- (pwd->noise_index +
- 1) & (NOISE_TAB_SIZE - 1);
- }
-
- n1 = pwd->exponent_high_sizes[bsize];
-
- /* compute power of high bands */
- exponents = pwd->exponents[ch] +
- (pwd->high_band_start[bsize] << bsize);
- last_high_band = 0; /* avoid warning */
- for (j = 0; j < n1; j++) {
- n = pwd->exponent_high_bands[pwd->
- frame_len_bits
- -
- pwd->
- block_len_bits]
- [j];
- if (pwd->high_band_coded[ch][j]) {
- float e2, val;
- e2 = 0;
- for (i = 0; i < n; i++) {
- val = exponents[i << bsize
- >> esize];
- e2 += val * val;
- }
- exp_power[j] = e2 / n;
- last_high_band = j;
- }
- exponents += n << bsize;
- }
-
- /* main freqs and high freqs */
- exponents =
- pwd->exponents[ch] +
- (pwd->coefs_start << bsize);
- for (j = -1; j < n1; j++) {
- if (j < 0) {
- n = pwd->high_band_start[bsize] -
- pwd->coefs_start;
- } else {
- n = pwd->exponent_high_bands[pwd->
- frame_len_bits
- -
- pwd->
- block_len_bits]
- [j];
- }
- if (j >= 0 && pwd->high_band_coded[ch][j]) {
- /* use noise with specified power */
- mult1 =
- sqrt(exp_power[j] /
- exp_power
- [last_high_band]);
- /* XXX: use a table */
- mult1 =
- mult1 * pow(10,
- pwd->
- high_band_values
- [ch][j] * 0.05);
- mult1 =
- mult1 /
- (pwd->max_exponent[ch] *
- pwd->noise_mult);
- mult1 *= mdct_norm;
- for (i = 0; i < n; i++) {
- noise =
- pwd->noise_table[pwd->
- noise_index];
- pwd->noise_index =
- (pwd->noise_index +
- 1) &
- (NOISE_TAB_SIZE -
- 1);
- *coefs++ =
- noise *
- exponents[i << bsize
- >> esize]
- * mult1;
- }
- exponents += n << bsize;
- } else {
- /* coded values + small noise */
- for (i = 0; i < n; i++) {
- noise =
- pwd->noise_table[pwd->
- noise_index];
- pwd->noise_index =
- (pwd->noise_index +
- 1) &
- (NOISE_TAB_SIZE -
- 1);
- *coefs++ =
- ((*coefs1++) +
- noise) *
- exponents[i << bsize
- >> esize]
- * mult;
- }
- exponents += n << bsize;
- }
- }
-
- /* very high freqs : noise */
- n = pwd->block_len - pwd->coefs_end[bsize];
- mult1 =
- mult * exponents[((-1 << bsize)) >> esize];
- for (i = 0; i < n; i++) {
- *coefs++ =
- pwd->noise_table[pwd->noise_index] *
- mult1;
- pwd->noise_index =
- (pwd->noise_index +
- 1) & (NOISE_TAB_SIZE - 1);
- }
- } else {
- /* XXX: optimize more */
- for (i = 0; i < pwd->coefs_start; i++)
- *coefs++ = 0.0;
- n = nb_coefs[ch];
- for (i = 0; i < n; i++) {
- *coefs++ =
- coefs1[i] *
- exponents[i << bsize >> esize] *
- mult;
- }
- n = pwd->block_len - pwd->coefs_end[bsize];
- for (i = 0; i < n; i++)
- *coefs++ = 0.0;
- }
- }
- }
-
+ compute_mdct_coefficients(pwd, bsize, total_gain, nb_coefs);
if (pwd->ms_stereo && pwd->channel_coded[1]) {
float a, b;
int i;
-
/*
* Nominal case for ms stereo: we do it before mdct.
*
pwd->coefs[1][i] = a - b;
}
}
-
next:
for (ch = 0; ch < pwd->ahi.channels; ch++) {
int n4, index;
samples += pwd->ahi.channels * pwd->frame_len;
}
PARA_DEBUG_LOG("frame_count: %d frame_len: %d, block_len: %d, "
- "outbytes: %d, eaten: %d\n",
+ "outbytes: %zd, eaten: %d\n",
frame_count, pwd->frame_len, pwd->block_len,
(int8_t *) samples - (int8_t *) data, pwd->ahi.block_align);
*data_size = (int8_t *)samples - (int8_t *)data;
projects / paraslash.git / blobdiff