}
/* compute the scale factor band sizes for each MDCT block size */
-static void compute_scale_factor_band_sizes(struct private_wmadec_data *s,
+static void compute_scale_factor_band_sizes(struct private_wmadec_data *pwd,
float high_freq)
{
- struct asf_header_info *ahi = &s->ahi;
+ struct asf_header_info *ahi = &pwd->ahi;
int a, b, pos, lpos, k, block_len, i, j, n;
const uint8_t *table;
- s->coefs_start = 0;
- for (k = 0; k < s->nb_block_sizes; k++) {
- block_len = s->frame_len >> k;
+ pwd->coefs_start = 0;
+ for (k = 0; k < pwd->nb_block_sizes; k++) {
+ block_len = pwd->frame_len >> k;
table = NULL;
- a = s->frame_len_bits - BLOCK_MIN_BITS - k;
+ a = pwd->frame_len_bits - BLOCK_MIN_BITS - k;
if (a < 3) {
if (ahi->sample_rate >= 44100)
table = exponent_band_44100[a];
if (table) {
n = *table++;
for (i = 0; i < n; i++)
- s->exponent_bands[k][i] = table[i];
- s->exponent_sizes[k] = n;
+ pwd->exponent_bands[k][i] = table[i];
+ pwd->exponent_sizes[k] = n;
} else {
j = 0;
lpos = 0;
if (pos > block_len)
pos = block_len;
if (pos > lpos)
- s->exponent_bands[k][j++] = pos - lpos;
+ pwd->exponent_bands[k][j++] = pos - lpos;
if (pos >= block_len)
break;
lpos = pos;
}
- s->exponent_sizes[k] = j;
+ pwd->exponent_sizes[k] = j;
}
/* max number of coefs */
- s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;
+ pwd->coefs_end[k] = (pwd->frame_len - ((pwd->frame_len * 9) / 100)) >> k;
/* high freq computation */
- s->high_band_start[k] = (int) ((block_len * 2 * high_freq)
+ pwd->high_band_start[k] = (int) ((block_len * 2 * high_freq)
/ ahi->sample_rate + 0.5);
- n = s->exponent_sizes[k];
+ n = pwd->exponent_sizes[k];
j = 0;
pos = 0;
for (i = 0; i < n; i++) {
int start, end;
start = pos;
- pos += s->exponent_bands[k][i];
+ pos += pwd->exponent_bands[k][i];
end = pos;
- if (start < s->high_band_start[k])
- start = s->high_band_start[k];
- if (end > s->coefs_end[k])
- end = s->coefs_end[k];
+ if (start < pwd->high_band_start[k])
+ start = pwd->high_band_start[k];
+ if (end > pwd->coefs_end[k])
+ end = pwd->coefs_end[k];
if (end > start)
- s->exponent_high_bands[k][j++] = end - start;
+ pwd->exponent_high_bands[k][j++] = end - start;
}
- s->exponent_high_sizes[k] = j;
+ pwd->exponent_high_sizes[k] = j;
}
}
-static int wma_init(struct private_wmadec_data *s, int flags2, struct asf_header_info *ahi)
+static int wma_init(struct private_wmadec_data *pwd, int flags2, struct asf_header_info *ahi)
{
int i;
float bps1, high_freq;
/* compute MDCT block size */
if (ahi->sample_rate <= 16000) {
- s->frame_len_bits = 9;
+ pwd->frame_len_bits = 9;
} else if (ahi->sample_rate <= 22050) {
- s->frame_len_bits = 10;
+ pwd->frame_len_bits = 10;
} else {
- s->frame_len_bits = 11;
+ pwd->frame_len_bits = 11;
}
- s->frame_len = 1 << s->frame_len_bits;
- if (s->use_variable_block_len) {
+ pwd->frame_len = 1 << pwd->frame_len_bits;
+ if (pwd->use_variable_block_len) {
int nb_max, nb;
nb = ((flags2 >> 3) & 3) + 1;
if ((ahi->bit_rate / ahi->channels) >= 32000)
nb += 2;
- nb_max = s->frame_len_bits - BLOCK_MIN_BITS;
+ nb_max = pwd->frame_len_bits - BLOCK_MIN_BITS;
if (nb > nb_max)
nb = nb_max;
- s->nb_block_sizes = nb + 1;
+ pwd->nb_block_sizes = nb + 1;
} else
- s->nb_block_sizes = 1;
+ pwd->nb_block_sizes = 1;
/* init rate dependent parameters */
- s->use_noise_coding = 1;
+ pwd->use_noise_coding = 1;
high_freq = ahi->sample_rate * 0.5;
/* wma2 rates are normalized */
sample_rate1 = 8000;
bps = (float) ahi->bit_rate / (float) (ahi->channels * ahi->sample_rate);
- s->byte_offset_bits = wma_log2((int) (bps * s->frame_len / 8.0 + 0.5)) + 2;
+ pwd->byte_offset_bits = wma_log2((int) (bps * pwd->frame_len / 8.0 + 0.5)) + 2;
/*
* Compute high frequency value and choose if noise coding should be
* activated.
bps1 = bps * 1.6;
if (sample_rate1 == 44100) {
if (bps1 >= 0.61)
- s->use_noise_coding = 0;
+ pwd->use_noise_coding = 0;
else
high_freq = high_freq * 0.4;
} else if (sample_rate1 == 22050) {
if (bps1 >= 1.16)
- s->use_noise_coding = 0;
+ pwd->use_noise_coding = 0;
else if (bps1 >= 0.72)
high_freq = high_freq * 0.7;
else
if (bps <= 0.625) {
high_freq = high_freq * 0.5;
} else if (bps > 0.75) {
- s->use_noise_coding = 0;
+ pwd->use_noise_coding = 0;
} else {
high_freq = high_freq * 0.65;
}
ahi->bit_rate, ahi->block_align);
PARA_INFO_LOG("frame_len=%d, bps=%f bps1=%f "
"high_freq=%f bitoffset=%d\n",
- s->frame_len, bps, bps1,
- high_freq, s->byte_offset_bits);
+ pwd->frame_len, bps, bps1,
+ high_freq, pwd->byte_offset_bits);
PARA_INFO_LOG("use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
- s->use_noise_coding, s->use_exp_vlc, s->nb_block_sizes);
+ pwd->use_noise_coding, pwd->use_exp_vlc, pwd->nb_block_sizes);
- compute_scale_factor_band_sizes(s, high_freq);
+ compute_scale_factor_band_sizes(pwd, high_freq);
/* init MDCT windows : simple sinus window */
- for (i = 0; i < s->nb_block_sizes; i++) {
+ for (i = 0; i < pwd->nb_block_sizes; i++) {
int n;
- n = 1 << (s->frame_len_bits - i);
- sine_window_init(ff_sine_windows[s->frame_len_bits - i - 7], n);
- s->windows[i] = ff_sine_windows[s->frame_len_bits - i - 7];
+ 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];
}
- s->reset_block_lengths = 1;
+ pwd->reset_block_lengths = 1;
- if (s->use_noise_coding) {
+ if (pwd->use_noise_coding) {
/* init the noise generator */
- if (s->use_exp_vlc)
- s->noise_mult = 0.02;
+ if (pwd->use_exp_vlc)
+ pwd->noise_mult = 0.02;
else
- s->noise_mult = 0.04;
+ pwd->noise_mult = 0.04;
{
unsigned int seed;
float norm;
seed = 1;
- norm = (1.0 / (float) (1LL << 31)) * sqrt(3) * s->noise_mult;
+ norm = (1.0 / (float) (1LL << 31)) * sqrt(3) * pwd->noise_mult;
for (i = 0; i < NOISE_TAB_SIZE; i++) {
seed = seed * 314159 + 1;
- s->noise_table[i] = (float) ((int) seed) * norm;
+ pwd->noise_table[i] = (float) ((int) seed) * norm;
}
}
}
else if (bps1 < 1.16)
coef_vlc_table = 1;
}
- s->coef_vlcs[0] = &coef_vlcs[coef_vlc_table * 2];
- s->coef_vlcs[1] = &coef_vlcs[coef_vlc_table * 2 + 1];
- init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],
- &s->int_table[0], s->coef_vlcs[0]);
- init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],
- &s->int_table[1], s->coef_vlcs[1]);
+ pwd->coef_vlcs[0] = &coef_vlcs[coef_vlc_table * 2];
+ pwd->coef_vlcs[1] = &coef_vlcs[coef_vlc_table * 2 + 1];
+ init_coef_vlc(&pwd->coef_vlc[0], &pwd->run_table[0], &pwd->level_table[0],
+ &pwd->int_table[0], pwd->coef_vlcs[0]);
+ init_coef_vlc(&pwd->coef_vlc[1], &pwd->run_table[1], &pwd->level_table[1],
+ &pwd->int_table[1], pwd->coef_vlcs[1]);
return 0;
}
-static void wma_lsp_to_curve_init(struct private_wmadec_data *s, int frame_len)
+static void wma_lsp_to_curve_init(struct private_wmadec_data *pwd, int frame_len)
{
float wdel, a, b;
int i, e, m;
wdel = M_PI / frame_len;
for (i = 0; i < frame_len; i++)
- s->lsp_cos_table[i] = 2.0f * cos(wdel * i);
+ pwd->lsp_cos_table[i] = 2.0f * cos(wdel * i);
/* tables for x^-0.25 computation */
for (i = 0; i < 256; i++) {
e = i - 126;
- s->lsp_pow_e_table[i] = pow(2.0, e * -0.25);
+ pwd->lsp_pow_e_table[i] = pow(2.0, e * -0.25);
}
/* These two tables are needed to avoid two operations in pow_m1_4. */
m = (1 << LSP_POW_BITS) + i;
a = (float) m *(0.5 / (1 << LSP_POW_BITS));
a = pow(a, -0.25);
- s->lsp_pow_m_table1[i] = 2 * a - b;
- s->lsp_pow_m_table2[i] = b - a;
+ pwd->lsp_pow_m_table1[i] = 2 * a - b;
+ pwd->lsp_pow_m_table2[i] = b - a;
b = a;
}
}
static int wma_decode_init(char *initial_buf, int len, struct private_wmadec_data **result)
{
- struct private_wmadec_data *s;
+ struct private_wmadec_data *pwd;
int ret, i;
PARA_NOTICE_LOG("initial buf: %d bytes\n", len);
- s = para_calloc(sizeof(*s));
- ret = read_asf_header(initial_buf, len, &s->ahi);
+ pwd = para_calloc(sizeof(*pwd));
+ ret = read_asf_header(initial_buf, len, &pwd->ahi);
if (ret <= 0) {
- free(s);
+ free(pwd);
return ret;
}
- s->use_exp_vlc = s->ahi.flags2 & 0x0001;
- s->use_bit_reservoir = s->ahi.flags2 & 0x0002;
- s->use_variable_block_len = s->ahi.flags2 & 0x0004;
+ pwd->use_exp_vlc = pwd->ahi.flags2 & 0x0001;
+ pwd->use_bit_reservoir = pwd->ahi.flags2 & 0x0002;
+ pwd->use_variable_block_len = pwd->ahi.flags2 & 0x0004;
- ret = wma_init(s, s->ahi.flags2, &s->ahi);
+ ret = wma_init(pwd, pwd->ahi.flags2, &pwd->ahi);
if (ret < 0)
return ret;
/* init MDCT */
- for (i = 0; i < s->nb_block_sizes; i++) {
- ret = imdct_init(s->frame_len_bits - i + 1, &s->mdct_ctx[i]);
+ for (i = 0; i < pwd->nb_block_sizes; i++) {
+ ret = imdct_init(pwd->frame_len_bits - i + 1, &pwd->mdct_ctx[i]);
if (ret < 0)
return ret;
}
- if (s->use_noise_coding) {
+ if (pwd->use_noise_coding) {
PARA_INFO_LOG("using noise coding\n");
- init_vlc(&s->hgain_vlc, HGAINVLCBITS,
+ init_vlc(&pwd->hgain_vlc, HGAINVLCBITS,
sizeof(ff_wma_hgain_huffbits), ff_wma_hgain_huffbits,
1, 1, ff_wma_hgain_huffcodes, 2, 2);
}
- if (s->use_exp_vlc) {
+ if (pwd->use_exp_vlc) {
PARA_INFO_LOG("using exp_vlc\n");
- init_vlc(&s->exp_vlc, EXPVLCBITS,
+ init_vlc(&pwd->exp_vlc, EXPVLCBITS,
sizeof(ff_wma_scale_huffbits), ff_wma_scale_huffbits,
1, 1, ff_wma_scale_huffcodes, 4, 4);
} else {
PARA_INFO_LOG("using curve\n");
- wma_lsp_to_curve_init(s, s->frame_len);
+ wma_lsp_to_curve_init(pwd, pwd->frame_len);
}
- *result = s;
- return s->ahi.header_len;
+ *result = pwd;
+ return pwd->ahi.header_len;
}
/**
* expense (linear interpolation approximately doubles the number of
* bits of precision).
*/
-static inline float pow_m1_4(struct private_wmadec_data *s, float x)
+static inline float pow_m1_4(struct private_wmadec_data *pwd, float x)
{
union {
float f;
m = (u.v >> (23 - LSP_POW_BITS)) & ((1 << LSP_POW_BITS) - 1);
/* build interpolation scale: 1 <= t < 2. */
t.v = ((u.v << LSP_POW_BITS) & ((1 << 23) - 1)) | (127 << 23);
- a = s->lsp_pow_m_table1[m];
- b = s->lsp_pow_m_table2[m];
- return s->lsp_pow_e_table[e] * (a + b * t.f);
+ a = pwd->lsp_pow_m_table1[m];
+ b = pwd->lsp_pow_m_table2[m];
+ return pwd->lsp_pow_e_table[e] * (a + b * t.f);
}
-static void wma_lsp_to_curve(struct private_wmadec_data *s,
+static void wma_lsp_to_curve(struct private_wmadec_data *pwd,
float *out, float *val_max_ptr, int n, float *lsp)
{
int i, j;
for (i = 0; i < n; i++) {
p = 0.5f;
q = 0.5f;
- w = s->lsp_cos_table[i];
+ w = pwd->lsp_cos_table[i];
for (j = 1; j < NB_LSP_COEFS; j += 2) {
q *= w - lsp[j - 1];
p *= w - lsp[j];
p *= p * (2.0f - w);
q *= q * (2.0f + w);
v = p + q;
- v = pow_m1_4(s, v);
+ v = pow_m1_4(pwd, v);
if (v > val_max)
val_max = v;
out[i] = v;
}
/* Decode exponents coded with LSP coefficients (same idea as Vorbis). */
-static void decode_exp_lsp(struct private_wmadec_data *s, int ch)
+static void decode_exp_lsp(struct private_wmadec_data *pwd, int ch)
{
float lsp_coefs[NB_LSP_COEFS];
int val, i;
for (i = 0; i < NB_LSP_COEFS; i++) {
if (i == 0 || i >= 8)
- val = get_bits(&s->gb, 3);
+ val = get_bits(&pwd->gb, 3);
else
- val = get_bits(&s->gb, 4);
+ val = get_bits(&pwd->gb, 4);
lsp_coefs[i] = ff_wma_lsp_codebook[i][val];
}
- wma_lsp_to_curve(s, s->exponents[ch], &s->max_exponent[ch],
- s->block_len, lsp_coefs);
+ wma_lsp_to_curve(pwd, pwd->exponents[ch], &pwd->max_exponent[ch],
+ pwd->block_len, lsp_coefs);
}
/*
}
/* Decode exponents coded with VLC codes. */
-static int decode_exp_vlc(struct private_wmadec_data *s, int ch)
+static int decode_exp_vlc(struct private_wmadec_data *pwd, int ch)
{
int last_exp, n, code;
const uint16_t *ptr, *band_ptr;
float v, *q, max_scale, *q_end;
- band_ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
+ band_ptr = pwd->exponent_bands[pwd->frame_len_bits - pwd->block_len_bits];
ptr = band_ptr;
- q = s->exponents[ch];
- q_end = q + s->block_len;
+ q = pwd->exponents[ch];
+ q_end = q + pwd->block_len;
max_scale = 0;
last_exp = 36;
while (q < q_end) {
- code = get_vlc2(&s->gb, s->exp_vlc.table, EXPVLCBITS, EXPMAX);
+ code = get_vlc2(&pwd->gb, pwd->exp_vlc.table, EXPVLCBITS, EXPMAX);
if (code < 0)
return -1;
/* NOTE: this offset is the same as MPEG4 AAC ! */
*q++ = v;
} while (--n);
}
- s->max_exponent[ch] = max_scale;
+ pwd->max_exponent[ch] = max_scale;
return 0;
}
* We ensure that when the windows overlap their squared sum
* is always 1 (MDCT reconstruction rule).
*/
-static void wma_window(struct private_wmadec_data *s, float *out)
+static void wma_window(struct private_wmadec_data *pwd, float *out)
{
- float *in = s->output;
+ float *in = pwd->output;
int block_len, bsize, n;
/* left part */
- if (s->block_len_bits <= s->prev_block_len_bits) {
- block_len = s->block_len;
- bsize = s->frame_len_bits - s->block_len_bits;
- vector_mult_add(out, in, s->windows[bsize], out, block_len);
+ if (pwd->block_len_bits <= pwd->prev_block_len_bits) {
+ block_len = pwd->block_len;
+ bsize = pwd->frame_len_bits - pwd->block_len_bits;
+ vector_mult_add(out, in, pwd->windows[bsize], out, block_len);
} else {
- block_len = 1 << s->prev_block_len_bits;
- n = (s->block_len - block_len) / 2;
- bsize = s->frame_len_bits - s->prev_block_len_bits;
- vector_mult_add(out + n, in + n, s->windows[bsize], out + n,
+ block_len = 1 << pwd->prev_block_len_bits;
+ n = (pwd->block_len - block_len) / 2;
+ bsize = pwd->frame_len_bits - pwd->prev_block_len_bits;
+ vector_mult_add(out + n, in + n, pwd->windows[bsize], out + n,
block_len);
memcpy(out + n + block_len, in + n + block_len,
n * sizeof(float));
}
- out += s->block_len;
- in += s->block_len;
+ out += pwd->block_len;
+ in += pwd->block_len;
/* right part */
- if (s->block_len_bits <= s->next_block_len_bits) {
- block_len = s->block_len;
- bsize = s->frame_len_bits - s->block_len_bits;
- vector_mult_reverse(out, in, s->windows[bsize], block_len);
+ if (pwd->block_len_bits <= pwd->next_block_len_bits) {
+ block_len = pwd->block_len;
+ bsize = pwd->frame_len_bits - pwd->block_len_bits;
+ vector_mult_reverse(out, in, pwd->windows[bsize], block_len);
} else {
- block_len = 1 << s->next_block_len_bits;
- n = (s->block_len - block_len) / 2;
- bsize = s->frame_len_bits - s->next_block_len_bits;
+ block_len = 1 << pwd->next_block_len_bits;
+ n = (pwd->block_len - block_len) / 2;
+ bsize = pwd->frame_len_bits - pwd->next_block_len_bits;
memcpy(out, in, n * sizeof(float));
- vector_mult_reverse(out + n, in + n, s->windows[bsize],
+ vector_mult_reverse(out + n, in + n, pwd->windows[bsize],
block_len);
memset(out + n + block_len, 0, n * sizeof(float));
}
* @return 0 if OK. 1 if last block of frame. return -1 if
* unrecorrable error.
*/
-static int wma_decode_block(struct private_wmadec_data *s)
+static int wma_decode_block(struct private_wmadec_data *pwd)
{
int n, v, ch, code, bsize;
int coef_nb_bits, total_gain;
float mdct_norm;
/* compute current block length */
- if (s->use_variable_block_len) {
- n = wma_log2(s->nb_block_sizes - 1) + 1;
+ if (pwd->use_variable_block_len) {
+ n = wma_log2(pwd->nb_block_sizes - 1) + 1;
- if (s->reset_block_lengths) {
- s->reset_block_lengths = 0;
- v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ if (pwd->reset_block_lengths) {
+ pwd->reset_block_lengths = 0;
+ v = get_bits(&pwd->gb, n);
+ if (v >= pwd->nb_block_sizes)
return -1;
- s->prev_block_len_bits = s->frame_len_bits - v;
- v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ pwd->prev_block_len_bits = pwd->frame_len_bits - v;
+ v = get_bits(&pwd->gb, n);
+ if (v >= pwd->nb_block_sizes)
return -1;
- s->block_len_bits = s->frame_len_bits - v;
+ pwd->block_len_bits = pwd->frame_len_bits - v;
} else {
/* update block lengths */
- s->prev_block_len_bits = s->block_len_bits;
- s->block_len_bits = s->next_block_len_bits;
+ pwd->prev_block_len_bits = pwd->block_len_bits;
+ pwd->block_len_bits = pwd->next_block_len_bits;
}
- v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ v = get_bits(&pwd->gb, n);
+ if (v >= pwd->nb_block_sizes)
return -1;
- s->next_block_len_bits = s->frame_len_bits - v;
+ pwd->next_block_len_bits = pwd->frame_len_bits - v;
} else {
/* fixed block len */
- s->next_block_len_bits = s->frame_len_bits;
- s->prev_block_len_bits = s->frame_len_bits;
- s->block_len_bits = s->frame_len_bits;
+ pwd->next_block_len_bits = pwd->frame_len_bits;
+ pwd->prev_block_len_bits = pwd->frame_len_bits;
+ pwd->block_len_bits = pwd->frame_len_bits;
}
/* now check if the block length is coherent with the frame length */
- s->block_len = 1 << s->block_len_bits;
- if ((s->block_pos + s->block_len) > s->frame_len)
+ pwd->block_len = 1 << pwd->block_len_bits;
+ if ((pwd->block_pos + pwd->block_len) > pwd->frame_len)
return -E_INCOHERENT_BLOCK_LEN;
- if (s->ahi.channels == 2)
- s->ms_stereo = get_bits1(&s->gb);
+ if (pwd->ahi.channels == 2)
+ pwd->ms_stereo = get_bits1(&pwd->gb);
v = 0;
- for (ch = 0; ch < s->ahi.channels; ch++) {
- int a = get_bits1(&s->gb);
- s->channel_coded[ch] = a;
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ int a = get_bits1(&pwd->gb);
+ pwd->channel_coded[ch] = a;
v |= a;
}
- bsize = s->frame_len_bits - s->block_len_bits;
+ bsize = pwd->frame_len_bits - pwd->block_len_bits;
/* if no channel coded, no need to go further */
/* XXX: fix potential framing problems */
coef escape coding */
total_gain = 1;
for (;;) {
- int a = get_bits(&s->gb, 7);
+ int a = get_bits(&pwd->gb, 7);
total_gain += a;
if (a != 127)
break;
coef_nb_bits = wma_total_gain_to_bits(total_gain);
/* compute number of coefficients */
- n = s->coefs_end[bsize] - s->coefs_start;
- for (ch = 0; ch < s->ahi.channels; ch++)
+ n = pwd->coefs_end[bsize] - pwd->coefs_start;
+ for (ch = 0; ch < pwd->ahi.channels; ch++)
nb_coefs[ch] = n;
/* complex coding */
- if (s->use_noise_coding) {
- for (ch = 0; ch < s->ahi.channels; ch++) {
- if (s->channel_coded[ch]) {
+ if (pwd->use_noise_coding) {
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ if (pwd->channel_coded[ch]) {
int i, m, a;
- m = s->exponent_high_sizes[bsize];
+ m = pwd->exponent_high_sizes[bsize];
for (i = 0; i < m; i++) {
- a = get_bits1(&s->gb);
- s->high_band_coded[ch][i] = a;
+ a = get_bits1(&pwd->gb);
+ pwd->high_band_coded[ch][i] = a;
/* if noise coding, the coefficients are not transmitted */
if (a)
nb_coefs[ch] -=
- s->
+ pwd->
exponent_high_bands[bsize]
[i];
}
}
}
- for (ch = 0; ch < s->ahi.channels; ch++) {
- if (s->channel_coded[ch]) {
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ if (pwd->channel_coded[ch]) {
int i, val;
- n = s->exponent_high_sizes[bsize];
+ n = pwd->exponent_high_sizes[bsize];
val = (int) 0x80000000;
for (i = 0; i < n; i++) {
- if (s->high_band_coded[ch][i]) {
+ if (pwd->high_band_coded[ch][i]) {
if (val == (int) 0x80000000) {
val =
- get_bits(&s->gb,
+ get_bits(&pwd->gb,
7) - 19;
} else {
code =
- get_vlc2(&s->gb,
- s->
+ get_vlc2(&pwd->gb,
+ pwd->
hgain_vlc.
table,
HGAINVLCBITS,
return -1;
val += code - 18;
}
- s->high_band_values[ch][i] =
+ pwd->high_band_values[ch][i] =
val;
}
}
}
/* exponents can be reused in short blocks. */
- if ((s->block_len_bits == s->frame_len_bits) || get_bits1(&s->gb)) {
- for (ch = 0; ch < s->ahi.channels; ch++) {
- if (s->channel_coded[ch]) {
- if (s->use_exp_vlc) {
- if (decode_exp_vlc(s, ch) < 0)
+ if ((pwd->block_len_bits == pwd->frame_len_bits) || get_bits1(&pwd->gb)) {
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ if (pwd->channel_coded[ch]) {
+ if (pwd->use_exp_vlc) {
+ if (decode_exp_vlc(pwd, ch) < 0)
return -1;
} else {
- decode_exp_lsp(s, ch);
+ decode_exp_lsp(pwd, ch);
}
- s->exponents_bsize[ch] = bsize;
+ pwd->exponents_bsize[ch] = bsize;
}
}
}
/* parse spectral coefficients : just RLE encoding */
- for (ch = 0; ch < s->ahi.channels; ch++) {
- if (s->channel_coded[ch]) {
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
+ if (pwd->channel_coded[ch]) {
struct vlc *coef_vlc;
int level, run, sign, tindex;
int16_t *ptr, *eptr;
/* special VLC tables are used for ms stereo because
there is potentially less energy there */
- tindex = (ch == 1 && s->ms_stereo);
- coef_vlc = &s->coef_vlc[tindex];
- run_table = s->run_table[tindex];
- level_table = s->level_table[tindex];
+ tindex = (ch == 1 && pwd->ms_stereo);
+ coef_vlc = &pwd->coef_vlc[tindex];
+ run_table = pwd->run_table[tindex];
+ level_table = pwd->level_table[tindex];
/* XXX: optimize */
- ptr = &s->coefs1[ch][0];
+ ptr = &pwd->coefs1[ch][0];
eptr = ptr + nb_coefs[ch];
- memset(ptr, 0, s->block_len * sizeof(int16_t));
+ memset(ptr, 0, pwd->block_len * sizeof(int16_t));
for (;;) {
code =
- get_vlc2(&s->gb, coef_vlc->table, VLCBITS,
+ get_vlc2(&pwd->gb, coef_vlc->table, VLCBITS,
VLCMAX);
if (code < 0)
return -1;
break;
} else if (code == 0) {
/* escape */
- level = get_bits(&s->gb, coef_nb_bits);
+ level = get_bits(&pwd->gb, coef_nb_bits);
/* NOTE: this is rather suboptimal. reading
block_len_bits would be better */
run =
- get_bits(&s->gb, s->frame_len_bits);
+ get_bits(&pwd->gb, pwd->frame_len_bits);
} else {
/* normal code */
run = run_table[code];
level = level_table[code];
}
- sign = get_bits1(&s->gb);
+ sign = get_bits1(&pwd->gb);
if (!sign)
level = -level;
ptr += run;
/* normalize */
{
- int n4 = s->block_len / 2;
+ int n4 = pwd->block_len / 2;
mdct_norm = 1.0 / (float) n4;
}
/* finally compute the MDCT coefficients */
- for (ch = 0; ch < s->ahi.channels; ch++) {
- if (s->channel_coded[ch]) {
+ 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 = s->coefs1[ch];
- exponents = s->exponents[ch];
- esize = s->exponents_bsize[ch];
- mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
+ 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 = s->coefs[ch];
- if (s->use_noise_coding) {
+ coefs = pwd->coefs[ch];
+ if (pwd->use_noise_coding) {
mult1 = mult;
/* very low freqs : noise */
- for (i = 0; i < s->coefs_start; i++) {
+ for (i = 0; i < pwd->coefs_start; i++) {
*coefs++ =
- s->noise_table[s->noise_index] *
+ pwd->noise_table[pwd->noise_index] *
exponents[i << bsize >> esize] *
mult1;
- s->noise_index =
- (s->noise_index +
+ pwd->noise_index =
+ (pwd->noise_index +
1) & (NOISE_TAB_SIZE - 1);
}
- n1 = s->exponent_high_sizes[bsize];
+ n1 = pwd->exponent_high_sizes[bsize];
/* compute power of high bands */
- exponents = s->exponents[ch] +
- (s->high_band_start[bsize] << bsize);
+ exponents = pwd->exponents[ch] +
+ (pwd->high_band_start[bsize] << bsize);
last_high_band = 0; /* avoid warning */
for (j = 0; j < n1; j++) {
- n = s->exponent_high_bands[s->
+ n = pwd->exponent_high_bands[pwd->
frame_len_bits
-
- s->
+ pwd->
block_len_bits]
[j];
- if (s->high_band_coded[ch][j]) {
+ if (pwd->high_band_coded[ch][j]) {
float e2, val;
e2 = 0;
for (i = 0; i < n; i++) {
/* main freqs and high freqs */
exponents =
- s->exponents[ch] +
- (s->coefs_start << bsize);
+ pwd->exponents[ch] +
+ (pwd->coefs_start << bsize);
for (j = -1; j < n1; j++) {
if (j < 0) {
- n = s->high_band_start[bsize] -
- s->coefs_start;
+ n = pwd->high_band_start[bsize] -
+ pwd->coefs_start;
} else {
- n = s->exponent_high_bands[s->
+ n = pwd->exponent_high_bands[pwd->
frame_len_bits
-
- s->
+ pwd->
block_len_bits]
[j];
}
- if (j >= 0 && s->high_band_coded[ch][j]) {
+ if (j >= 0 && pwd->high_band_coded[ch][j]) {
/* use noise with specified power */
mult1 =
sqrt(exp_power[j] /
/* XXX: use a table */
mult1 =
mult1 * pow(10,
- s->
+ pwd->
high_band_values
[ch][j] * 0.05);
mult1 =
mult1 /
- (s->max_exponent[ch] *
- s->noise_mult);
+ (pwd->max_exponent[ch] *
+ pwd->noise_mult);
mult1 *= mdct_norm;
for (i = 0; i < n; i++) {
noise =
- s->noise_table[s->
+ pwd->noise_table[pwd->
noise_index];
- s->noise_index =
- (s->noise_index +
+ pwd->noise_index =
+ (pwd->noise_index +
1) &
(NOISE_TAB_SIZE -
1);
/* coded values + small noise */
for (i = 0; i < n; i++) {
noise =
- s->noise_table[s->
+ pwd->noise_table[pwd->
noise_index];
- s->noise_index =
- (s->noise_index +
+ pwd->noise_index =
+ (pwd->noise_index +
1) &
(NOISE_TAB_SIZE -
1);
}
/* very high freqs : noise */
- n = s->block_len - s->coefs_end[bsize];
+ n = pwd->block_len - pwd->coefs_end[bsize];
mult1 =
mult * exponents[((-1 << bsize)) >> esize];
for (i = 0; i < n; i++) {
*coefs++ =
- s->noise_table[s->noise_index] *
+ pwd->noise_table[pwd->noise_index] *
mult1;
- s->noise_index =
- (s->noise_index +
+ pwd->noise_index =
+ (pwd->noise_index +
1) & (NOISE_TAB_SIZE - 1);
}
} else {
/* XXX: optimize more */
- for (i = 0; i < s->coefs_start; i++)
+ for (i = 0; i < pwd->coefs_start; i++)
*coefs++ = 0.0;
n = nb_coefs[ch];
for (i = 0; i < n; i++) {
exponents[i << bsize >> esize] *
mult;
}
- n = s->block_len - s->coefs_end[bsize];
+ n = pwd->block_len - pwd->coefs_end[bsize];
for (i = 0; i < n; i++)
*coefs++ = 0.0;
}
}
}
- if (s->ms_stereo && s->channel_coded[1]) {
+ if (pwd->ms_stereo && pwd->channel_coded[1]) {
float a, b;
int i;
* No need to optimize this case because it should almost never
* happen.
*/
- if (!s->channel_coded[0]) {
+ if (!pwd->channel_coded[0]) {
PARA_NOTICE_LOG("rare ms-stereo\n");
- memset(s->coefs[0], 0, sizeof(float) * s->block_len);
- s->channel_coded[0] = 1;
+ memset(pwd->coefs[0], 0, sizeof(float) * pwd->block_len);
+ pwd->channel_coded[0] = 1;
}
- for (i = 0; i < s->block_len; i++) {
- a = s->coefs[0][i];
- b = s->coefs[1][i];
- s->coefs[0][i] = a + b;
- s->coefs[1][i] = a - b;
+ for (i = 0; i < pwd->block_len; i++) {
+ a = pwd->coefs[0][i];
+ b = pwd->coefs[1][i];
+ pwd->coefs[0][i] = a + b;
+ pwd->coefs[1][i] = a - b;
}
}
next:
- for (ch = 0; ch < s->ahi.channels; ch++) {
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
int n4, index;
- n = s->block_len;
- n4 = s->block_len / 2;
- if (s->channel_coded[ch])
- imdct(s->mdct_ctx[bsize], s->output, s->coefs[ch]);
- else if (!(s->ms_stereo && ch == 1))
- memset(s->output, 0, sizeof(s->output));
+ n = pwd->block_len;
+ n4 = pwd->block_len / 2;
+ if (pwd->channel_coded[ch])
+ imdct(pwd->mdct_ctx[bsize], pwd->output, pwd->coefs[ch]);
+ else if (!(pwd->ms_stereo && ch == 1))
+ memset(pwd->output, 0, sizeof(pwd->output));
/* multiply by the window and add in the frame */
- index = (s->frame_len / 2) + s->block_pos - n4;
- wma_window(s, &s->frame_out[ch][index]);
+ index = (pwd->frame_len / 2) + pwd->block_pos - n4;
+ wma_window(pwd, &pwd->frame_out[ch][index]);
}
/* update block number */
- s->block_pos += s->block_len;
- if (s->block_pos >= s->frame_len)
+ pwd->block_pos += pwd->block_len;
+ if (pwd->block_pos >= pwd->frame_len)
return 1;
else
return 0;
}
/* Decode a frame of frame_len samples. */
-static int wma_decode_frame(struct private_wmadec_data *s, int16_t *samples)
+static int wma_decode_frame(struct private_wmadec_data *pwd, int16_t *samples)
{
int ret, i, n, ch, incr;
int16_t *ptr;
float *iptr;
/* read each block */
- s->block_pos = 0;
+ pwd->block_pos = 0;
for (;;) {
- ret = wma_decode_block(s);
+ ret = wma_decode_block(pwd);
if (ret < 0)
return -1;
if (ret)
}
/* convert frame to integer */
- n = s->frame_len;
- incr = s->ahi.channels;
- for (ch = 0; ch < s->ahi.channels; ch++) {
+ n = pwd->frame_len;
+ incr = pwd->ahi.channels;
+ for (ch = 0; ch < pwd->ahi.channels; ch++) {
ptr = samples + ch;
- iptr = s->frame_out[ch];
+ iptr = pwd->frame_out[ch];
for (i = 0; i < n; i++) {
*ptr = av_clip_int16(lrintf(*iptr++));
ptr += incr;
}
/* prepare for next block */
- memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len],
- s->frame_len * sizeof(float));
+ memmove(&pwd->frame_out[ch][0], &pwd->frame_out[ch][pwd->frame_len],
+ pwd->frame_len * sizeof(float));
}
return 0;
}
-static int wma_decode_superframe(struct private_wmadec_data *s, void *data,
+static int wma_decode_superframe(struct private_wmadec_data *pwd, void *data,
int *data_size, const uint8_t *buf, int buf_size)
{
int ret, nb_frames, bit_offset, i, pos, len;
static int frame_count;
if (buf_size == 0) {
- s->last_superframe_len = 0;
+ pwd->last_superframe_len = 0;
return 0;
}
- if (buf_size < s->ahi.block_align)
+ if (buf_size < pwd->ahi.block_align)
return 0;
- buf_size = s->ahi.block_align;
+ buf_size = pwd->ahi.block_align;
samples = data;
- init_get_bits(&s->gb, buf, buf_size * 8);
- if (s->use_bit_reservoir) {
+ init_get_bits(&pwd->gb, buf, buf_size * 8);
+ if (pwd->use_bit_reservoir) {
/* read super frame header */
- skip_bits(&s->gb, 4); /* super frame index */
- nb_frames = get_bits(&s->gb, 4) - 1;
+ skip_bits(&pwd->gb, 4); /* super frame index */
+ nb_frames = get_bits(&pwd->gb, 4) - 1;
// PARA_DEBUG_LOG("have %d frames\n", nb_frames);
ret = -E_WMA_OUTPUT_SPACE;
- if ((nb_frames + 1) * s->ahi.channels * s->frame_len
+ if ((nb_frames + 1) * pwd->ahi.channels * pwd->frame_len
* sizeof(int16_t) > *data_size)
goto fail;
- bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3);
+ bit_offset = get_bits(&pwd->gb, pwd->byte_offset_bits + 3);
- if (s->last_superframe_len > 0) {
+ if (pwd->last_superframe_len > 0) {
/* add bit_offset bits to last frame */
ret = -E_WMA_BAD_SUPERFRAME;
- if ((s->last_superframe_len + ((bit_offset + 7) >> 3)) >
+ if ((pwd->last_superframe_len + ((bit_offset + 7) >> 3)) >
MAX_CODED_SUPERFRAME_SIZE)
goto fail;
- q = s->last_superframe + s->last_superframe_len;
+ q = pwd->last_superframe + pwd->last_superframe_len;
len = bit_offset;
while (len > 7) {
- *q++ = get_bits(&s->gb, 8);
+ *q++ = get_bits(&pwd->gb, 8);
len -= 8;
}
if (len > 0)
- *q++ = get_bits(&s->gb, len) << (8 - len);
+ *q++ = get_bits(&pwd->gb, len) << (8 - len);
/* XXX: bit_offset bits into last frame */
- init_get_bits(&s->gb, s->last_superframe,
+ init_get_bits(&pwd->gb, pwd->last_superframe,
MAX_CODED_SUPERFRAME_SIZE * 8);
/* skip unused bits */
- if (s->last_bitoffset > 0)
- skip_bits(&s->gb, s->last_bitoffset);
+ if (pwd->last_bitoffset > 0)
+ skip_bits(&pwd->gb, pwd->last_bitoffset);
/*
* This frame is stored in the last superframe and in
* the current one.
*/
ret = -E_WMA_DECODE;
- if (wma_decode_frame(s, samples) < 0)
+ if (wma_decode_frame(pwd, samples) < 0)
goto fail;
frame_count++;
- samples += s->ahi.channels * s->frame_len;
+ samples += pwd->ahi.channels * pwd->frame_len;
}
/* read each frame starting from bit_offset */
- pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3;
- init_get_bits(&s->gb, buf + (pos >> 3),
+ pos = bit_offset + 4 + 4 + pwd->byte_offset_bits + 3;
+ init_get_bits(&pwd->gb, buf + (pos >> 3),
(MAX_CODED_SUPERFRAME_SIZE - (pos >> 3)) * 8);
len = pos & 7;
if (len > 0)
- skip_bits(&s->gb, len);
+ skip_bits(&pwd->gb, len);
- s->reset_block_lengths = 1;
+ pwd->reset_block_lengths = 1;
for (i = 0; i < nb_frames; i++) {
ret = -E_WMA_DECODE;
- if (wma_decode_frame(s, samples) < 0)
+ if (wma_decode_frame(pwd, samples) < 0)
goto fail;
frame_count++;
- samples += s->ahi.channels * s->frame_len;
+ samples += pwd->ahi.channels * pwd->frame_len;
}
/* we copy the end of the frame in the last frame buffer */
- pos = get_bits_count(&s->gb) +
- ((bit_offset + 4 + 4 + s->byte_offset_bits + 3) & ~7);
- s->last_bitoffset = pos & 7;
+ pos = get_bits_count(&pwd->gb) +
+ ((bit_offset + 4 + 4 + pwd->byte_offset_bits + 3) & ~7);
+ pwd->last_bitoffset = pos & 7;
pos >>= 3;
len = buf_size - pos;
ret = -E_WMA_BAD_SUPERFRAME;
if (len > MAX_CODED_SUPERFRAME_SIZE || len < 0)
goto fail;
- s->last_superframe_len = len;
- memcpy(s->last_superframe, buf + pos, len);
+ pwd->last_superframe_len = len;
+ memcpy(pwd->last_superframe, buf + pos, len);
} else {
PARA_DEBUG_LOG("not using bit reservoir\n");
ret = -E_WMA_OUTPUT_SPACE;
- if (s->ahi.channels * s->frame_len * sizeof(int16_t) > *data_size)
+ if (pwd->ahi.channels * pwd->frame_len * sizeof(int16_t) > *data_size)
goto fail;
/* single frame decode */
ret = -E_WMA_DECODE;
- if (wma_decode_frame(s, samples) < 0)
+ if (wma_decode_frame(pwd, samples) < 0)
goto fail;
frame_count++;
- samples += s->ahi.channels * s->frame_len;
+ samples += pwd->ahi.channels * pwd->frame_len;
}
PARA_DEBUG_LOG("frame_count: %d frame_len: %d, block_len: %d, "
"outbytes: %d, eaten: %d\n",
- frame_count, s->frame_len, s->block_len,
- (int8_t *) samples - (int8_t *) data, s->ahi.block_align);
+ 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;
- return s->ahi.block_align;
+ return pwd->ahi.block_align;
fail:
/* reset the bit reservoir on errors */
- s->last_superframe_len = 0;
+ pwd->last_superframe_len = 0;
return ret;
}
projects / paraslash.git / commitdiff