*/
#include "libavutil/attributes.h"
+
#include "avcodec.h"
#include "sinewin.h"
#include "wma.h"
#include "wma_common.h"
+#include "wma_freqs.h"
#include "wmadata.h"
#undef NDEBUG
#include <assert.h>
/* XXX: use same run/length optimization as mpeg decoders */
-//FIXME maybe split decode / encode or pass flag
+// FIXME maybe split decode / encode or pass flag
static av_cold void init_coef_vlc(VLC *vlc, uint16_t **prun_table,
float **plevel_table, uint16_t **pint_table,
const CoefVLCTable *vlc_table)
{
- int n = vlc_table->n;
+ int n = vlc_table->n;
const uint8_t *table_bits = vlc_table->huffbits;
const uint32_t *table_codes = vlc_table->huffcodes;
const uint16_t *levels_table = vlc_table->levels;
init_vlc(vlc, VLCBITS, n, table_bits, 1, 1, table_codes, 4, 4, 0);
- run_table = av_malloc_array(n, sizeof(uint16_t));
- level_table = av_malloc_array(n, sizeof(uint16_t));
- flevel_table= av_malloc_array(n, sizeof(*flevel_table));
- int_table = av_malloc_array(n, sizeof(uint16_t));
- i = 2;
- level = 1;
- k = 0;
+ run_table = av_malloc_array(n, sizeof(uint16_t));
+ level_table = av_malloc_array(n, sizeof(uint16_t));
+ flevel_table = av_malloc_array(n, sizeof(*flevel_table));
+ int_table = av_malloc_array(n, sizeof(uint16_t));
+ i = 2;
+ level = 1;
+ k = 0;
while (i < n) {
int_table[k] = i;
- l = levels_table[k++];
+ l = levels_table[k++];
for (j = 0; j < l; j++) {
- run_table[i] = j;
- level_table[i] = level;
- flevel_table[i]= level;
+ run_table[i] = j;
+ level_table[i] = level;
+ flevel_table[i] = level;
i++;
}
level++;
int sample_rate1;
int coef_vlc_table;
- if ( avctx->sample_rate <= 0 || avctx->sample_rate > 50000
- || avctx->channels <= 0 || avctx->channels > 2
- || avctx->bit_rate <= 0)
+ if (avctx->sample_rate <= 0 || avctx->sample_rate > 50000 ||
+ avctx->channels <= 0 || avctx->channels > 2 ||
+ avctx->bit_rate <= 0)
return -1;
ff_fmt_convert_init(&s->fmt_conv, avctx);
avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
- if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
+ if (avctx->codec->id == AV_CODEC_ID_WMAV1)
s->version = 1;
- } else {
+ else
s->version = 2;
- }
/* compute MDCT block size */
s->frame_len_bits = ff_wma_get_frame_len_bits(avctx->sample_rate,
if (nb > nb_max)
nb = nb_max;
s->nb_block_sizes = nb + 1;
- } else {
+ } else
s->nb_block_sizes = 1;
- }
/* init rate dependent parameters */
s->use_noise_coding = 1;
- high_freq = avctx->sample_rate * 0.5;
+ high_freq = avctx->sample_rate * 0.5;
/* if version 2, then the rates are normalized */
sample_rate1 = avctx->sample_rate;
if (s->version == 2) {
- if (sample_rate1 >= 44100) {
+ if (sample_rate1 >= 44100)
sample_rate1 = 44100;
- } else if (sample_rate1 >= 22050) {
+ else if (sample_rate1 >= 22050)
sample_rate1 = 22050;
- } else if (sample_rate1 >= 16000) {
+ else if (sample_rate1 >= 16000)
sample_rate1 = 16000;
- } else if (sample_rate1 >= 11025) {
+ else if (sample_rate1 >= 11025)
sample_rate1 = 11025;
- } else if (sample_rate1 >= 8000) {
+ else if (sample_rate1 >= 8000)
sample_rate1 = 8000;
- }
}
- bps = (float)avctx->bit_rate / (float)(avctx->channels * avctx->sample_rate);
- s->byte_offset_bits = av_log2((int)(bps * s->frame_len / 8.0 + 0.5)) + 2;
+ bps = (float) avctx->bit_rate /
+ (float) (avctx->channels * avctx->sample_rate);
+ s->byte_offset_bits = av_log2((int) (bps * s->frame_len / 8.0 + 0.5)) + 2;
if (s->byte_offset_bits + 3 > MIN_CACHE_BITS) {
av_log(avctx, AV_LOG_ERROR, "byte_offset_bits %d is too large\n", s->byte_offset_bits);
return AVERROR_PATCHWELCOME;
}
/* compute high frequency value and choose if noise coding should
- be activated */
+ * be activated */
bps1 = bps;
if (avctx->channels == 2)
bps1 = bps * 1.6;
if (sample_rate1 == 44100) {
- if (bps1 >= 0.61) {
+ if (bps1 >= 0.61)
s->use_noise_coding = 0;
- } else {
+ else
high_freq = high_freq * 0.4;
- }
} else if (sample_rate1 == 22050) {
- if (bps1 >= 1.16) {
+ if (bps1 >= 1.16)
s->use_noise_coding = 0;
- } else if (bps1 >= 0.72) {
+ else if (bps1 >= 0.72)
high_freq = high_freq * 0.7;
- } else {
+ else
high_freq = high_freq * 0.6;
- }
} else if (sample_rate1 == 16000) {
- if (bps > 0.5) {
+ if (bps > 0.5)
high_freq = high_freq * 0.5;
- } else {
+ else
high_freq = high_freq * 0.3;
- }
- } else if (sample_rate1 == 11025) {
+ } else if (sample_rate1 == 11025)
high_freq = high_freq * 0.7;
- } else if (sample_rate1 == 8000) {
- if (bps <= 0.625) {
+ else if (sample_rate1 == 8000) {
+ if (bps <= 0.625)
high_freq = high_freq * 0.5;
- } else if (bps > 0.75) {
+ else if (bps > 0.75)
s->use_noise_coding = 0;
- } else {
+ else
high_freq = high_freq * 0.65;
- }
} else {
- if (bps >= 0.8) {
+ if (bps >= 0.8)
high_freq = high_freq * 0.75;
- } else if (bps >= 0.6) {
+ else if (bps >= 0.6)
high_freq = high_freq * 0.6;
- } else {
+ else
high_freq = high_freq * 0.5;
- }
}
av_dlog(s->avctx, "flags2=0x%x\n", flags2);
av_dlog(s->avctx, "version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
int a, b, pos, lpos, k, block_len, i, j, n;
const uint8_t *table;
- if (s->version == 1) {
+ if (s->version == 1)
s->coefs_start = 3;
- } else {
+ else
s->coefs_start = 0;
- }
for (k = 0; k < s->nb_block_sizes; k++) {
block_len = s->frame_len >> k;
if (s->version == 1) {
lpos = 0;
for (i = 0; i < 25; i++) {
- a = ff_wma_critical_freqs[i];
- b = avctx->sample_rate;
+ a = ff_wma_critical_freqs[i];
+ b = avctx->sample_rate;
pos = ((block_len * 2 * a) + (b >> 1)) / b;
if (pos > block_len)
pos = block_len;
} else {
/* hardcoded tables */
table = NULL;
- a = s->frame_len_bits - BLOCK_MIN_BITS - k;
+ a = s->frame_len_bits - BLOCK_MIN_BITS - k;
if (a < 3) {
- if (avctx->sample_rate >= 44100) {
+ if (avctx->sample_rate >= 44100)
table = exponent_band_44100[a];
- } else if (avctx->sample_rate >= 32000) {
+ else if (avctx->sample_rate >= 32000)
table = exponent_band_32000[a];
- } else if (avctx->sample_rate >= 22050) {
+ else if (avctx->sample_rate >= 22050)
table = exponent_band_22050[a];
- }
}
if (table) {
n = *table++;
s->exponent_bands[k][i] = table[i];
s->exponent_sizes[k] = n;
} else {
- j = 0;
+ j = 0;
lpos = 0;
for (i = 0; i < 25; i++) {
- a = ff_wma_critical_freqs[i];
- b = avctx->sample_rate;
- pos = ((block_len * 2 * a) + (b << 1)) / (4 * b);
+ a = ff_wma_critical_freqs[i];
+ b = avctx->sample_rate;
+ pos = ((block_len * 2 * a) + (b << 1)) / (4 * b);
pos <<= 2;
if (pos > block_len)
pos = block_len;
/* max number of coefs */
s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;
/* high freq computation */
- s->high_band_start[k] = (int)((block_len * 2 * high_freq) /
- avctx->sample_rate + 0.5);
- n = s->exponent_sizes[k];
- j = 0;
+ s->high_band_start[k] = (int) ((block_len * 2 * high_freq) /
+ avctx->sample_rate + 0.5);
+ n = s->exponent_sizes[k];
+ j = 0;
pos = 0;
for (i = 0; i < n; i++) {
int start, end;
start = pos;
- pos += s->exponent_bands[k][i];
- end = pos;
+ pos += s->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])
for (j = 0; j < s->exponent_high_sizes[k]; j++)
tprintf(s->avctx, " %d", s->exponent_high_bands[k][j]);
tprintf(s->avctx, "\n");
-#endif
+#endif /* 0 */
}
}
tprintf(s->avctx, "\n");
}
}
-#endif
+#endif /* TRACE */
/* init MDCT windows : simple sine window */
for (i = 0; i < s->nb_block_sizes; i++) {
s->reset_block_lengths = 1;
if (s->use_noise_coding) {
-
/* init the noise generator */
- if (s->use_exp_vlc) {
+ if (s->use_exp_vlc)
s->noise_mult = 0.02;
- } else {
+ else
s->noise_mult = 0.04;
- }
#ifdef TRACE
for (i = 0; i < NOISE_TAB_SIZE; i++)
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) * s->noise_mult;
for (i = 0; i < NOISE_TAB_SIZE; i++) {
- seed = seed * 314159 + 1;
- s->noise_table[i] = (float)((int)seed) * norm;
+ seed = seed * 314159 + 1;
+ s->noise_table[i] = (float) ((int) seed) * norm;
}
}
-#endif
+#endif /* TRACE */
}
/* choose the VLC tables for the coefficients */
coef_vlc_table = 2;
if (avctx->sample_rate >= 32000) {
- if (bps1 < 0.72) {
+ if (bps1 < 0.72)
coef_vlc_table = 0;
- } else if (bps1 < 1.16) {
+ 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]);
+ 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]);
return 0;
}
int ff_wma_total_gain_to_bits(int total_gain)
{
- if (total_gain < 15) return 13;
- else if (total_gain < 32) return 12;
- else if (total_gain < 40) return 11;
- else if (total_gain < 45) return 10;
- else return 9;
+ if (total_gain < 15)
+ return 13;
+ else if (total_gain < 32)
+ return 12;
+ else if (total_gain < 40)
+ return 11;
+ else if (total_gain < 45)
+ return 10;
+ else
+ return 9;
}
int ff_wma_end(AVCodecContext *avctx)
for (i = 0; i < s->nb_block_sizes; i++)
ff_mdct_end(&s->mdct_ctx[i]);
- if (s->use_exp_vlc) {
+ if (s->use_exp_vlc)
ff_free_vlc(&s->exp_vlc);
- }
- if (s->use_noise_coding) {
+ if (s->use_noise_coding)
ff_free_vlc(&s->hgain_vlc);
- }
for (i = 0; i < 2; i++) {
ff_free_vlc(&s->coef_vlc[i]);
av_freep(&s->run_table[i]);
* @param gb GetBitContext
* @return the decoded coefficient
*/
-unsigned int ff_wma_get_large_val(GetBitContext* gb)
+unsigned int ff_wma_get_large_val(GetBitContext *gb)
{
/** consumes up to 34 bits */
int n_bits = 8;
n_bits += 8;
if (get_bits1(gb)) {
n_bits += 8;
- if (get_bits1(gb)) {
+ if (get_bits1(gb))
n_bits += 7;
- }
}
}
return get_bits_long(gb, n_bits);
* @param coef_nb_bits number of bits for escaped level codes
* @return 0 on success, -1 otherwise
*/
-int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
- VLC *vlc,
- const float *level_table, const uint16_t *run_table,
- int version, WMACoef *ptr, int offset,
- int num_coefs, int block_len, int frame_len_bits,
+int ff_wma_run_level_decode(AVCodecContext *avctx, GetBitContext *gb,
+ VLC *vlc, const float *level_table,
+ const uint16_t *run_table, int version,
+ WMACoef *ptr, int offset, int num_coefs,
+ int block_len, int frame_len_bits,
int coef_nb_bits)
{
int code, level, sign;
- const uint32_t *ilvl = (const uint32_t*)level_table;
- uint32_t *iptr = (uint32_t*)ptr;
+ const uint32_t *ilvl = (const uint32_t *) level_table;
+ uint32_t *iptr = (uint32_t *) ptr;
const unsigned int coef_mask = block_len - 1;
for (; offset < num_coefs; offset++) {
code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX);
if (code > 1) {
/** normal code */
- offset += run_table[code];
- sign = get_bits1(gb) - 1;
- iptr[offset & coef_mask] = ilvl[code] ^ sign<<31;
+ offset += run_table[code];
+ sign = get_bits1(gb) - 1;
+ iptr[offset & coef_mask] = ilvl[code] ^ sign << 31;
} else if (code == 1) {
/** EOB */
break;
if (!version) {
level = get_bits(gb, coef_nb_bits);
/** NOTE: this is rather suboptimal. reading
- block_len_bits would be better */
+ * block_len_bits would be better */
offset += get_bits(gb, frame_len_bits);
} else {
level = ff_wma_get_large_val(gb);
if (get_bits1(gb)) {
if (get_bits1(gb)) {
if (get_bits1(gb)) {
- av_log(avctx,AV_LOG_ERROR,
- "broken escape sequence\n");
+ av_log(avctx, AV_LOG_ERROR,
+ "broken escape sequence\n");
return -1;
} else
offset += get_bits(gb, frame_len_bits) + 4;
offset += get_bits(gb, 2) + 1;
}
}
- sign = get_bits1(gb) - 1;
- ptr[offset & coef_mask] = (level^sign) - sign;
+ sign = get_bits1(gb) - 1;
+ ptr[offset & coef_mask] = (level ^ sign) - sign;
}
}
/** NOTE: EOB can be omitted */
projects / platform / framework / web / crosswalk.git / blobdiff