33 float **plevel_table, uint16_t **pint_table,
37 const uint8_t *table_bits = vlc_table->
huffbits;
38 const uint32_t *table_codes = vlc_table->
huffcodes;
39 const uint16_t *levels_table = vlc_table->
levels;
40 uint16_t *run_table, *level_table, *int_table;
42 int i, l, j, k,
level;
46 run_table =
av_malloc(n *
sizeof(uint16_t));
47 level_table =
av_malloc(n *
sizeof(uint16_t));
48 flevel_table=
av_malloc(n *
sizeof(*flevel_table));
49 int_table =
av_malloc(n *
sizeof(uint16_t));
55 l = levels_table[k++];
56 for (j = 0; j < l; j++) {
58 level_table[i] =
level;
59 flevel_table[i]=
level;
64 *prun_table = run_table;
65 *plevel_table = flevel_table;
66 *pint_table = int_table;
78 unsigned int decode_flags)
83 if (sample_rate <= 16000) {
85 }
else if (sample_rate <= 22050 ||
86 (sample_rate <= 32000 && version == 1)) {
88 }
else if (sample_rate <= 48000 || version < 3) {
90 }
else if (sample_rate <= 96000) {
97 int tmp = decode_flags & 0x6;
100 }
else if (tmp == 0x4) {
102 }
else if (tmp == 0x6) {
107 return frame_len_bits;
114 float bps1, high_freq;
147 nb = ((flags2 >> 3) & 3) + 1;
165 if (sample_rate1 >= 44100) {
166 sample_rate1 = 44100;
167 }
else if (sample_rate1 >= 22050) {
168 sample_rate1 = 22050;
169 }
else if (sample_rate1 >= 16000) {
170 sample_rate1 = 16000;
171 }
else if (sample_rate1 >= 11025) {
172 sample_rate1 = 11025;
173 }
else if (sample_rate1 >= 8000) {
186 if (sample_rate1 == 44100) {
190 high_freq = high_freq * 0.4;
192 }
else if (sample_rate1 == 22050) {
195 }
else if (bps1 >= 0.72) {
196 high_freq = high_freq * 0.7;
198 high_freq = high_freq * 0.6;
200 }
else if (sample_rate1 == 16000) {
202 high_freq = high_freq * 0.5;
204 high_freq = high_freq * 0.3;
206 }
else if (sample_rate1 == 11025) {
207 high_freq = high_freq * 0.7;
208 }
else if (sample_rate1 == 8000) {
210 high_freq = high_freq * 0.5;
211 }
else if (bps > 0.75) {
214 high_freq = high_freq * 0.65;
218 high_freq = high_freq * 0.75;
219 }
else if (bps >= 0.6) {
220 high_freq = high_freq * 0.6;
222 high_freq = high_freq * 0.5;
226 av_dlog(s->
avctx,
"version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
229 av_dlog(s->
avctx,
"bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
231 av_dlog(s->
avctx,
"use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
236 int a,
b, pos, lpos, k, block_len, i, j, n;
237 const uint8_t *table;
249 for (i = 0; i < 25; i++) {
252 pos = ((block_len * 2 *
a) + (b >> 1)) / b;
256 if (pos >= block_len) {
278 for (i = 0; i < n; i++)
284 for (i = 0; i < 25; i++) {
287 pos = ((block_len * 2 *
a) + (b << 1)) / (4 * b);
293 if (pos >= block_len)
309 for (i = 0; i < n; i++) {
314 if (start < s->high_band_start[k])
323 tprintf(s->
avctx,
"%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
374 norm = (1.0 / (
float)(1LL << 31)) * sqrt(3) * s->
noise_mult;
385 if (s->sample_rate >= 32000) {
388 }
else if (bps1 < 1.16) {
392 s->coef_vlcs[0]= &
coef_vlcs[coef_vlc_table * 2 ];
393 s->coef_vlcs[1]= &
coef_vlcs[coef_vlc_table * 2 + 1];
394 init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0], &s->int_table[0],
396 init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1], &s->int_table[1],
404 if (total_gain < 15)
return 13;
405 else if (total_gain < 32)
return 12;
406 else if (total_gain < 40)
return 11;
407 else if (total_gain < 45)
return 10;
425 for (i = 0; i < 2; i++) {
475 const float *level_table,
const uint16_t *run_table,
477 int num_coefs,
int block_len,
int frame_len_bits,
480 int code,
level, sign;
481 const uint32_t *ilvl = (
const uint32_t*)level_table;
482 uint32_t *iptr = (uint32_t*)ptr;
483 const unsigned int coef_mask = block_len - 1;
484 for (; offset < num_coefs; offset++) {
488 offset += run_table[code];
490 iptr[offset & coef_mask] = ilvl[code] ^ sign<<31;
491 }
else if (code == 1) {
500 offset +=
get_bits(gb, frame_len_bits);
508 "broken escape sequence\n");
511 offset +=
get_bits(gb, frame_len_bits) + 4;
517 ptr[offset & coef_mask] = (level^sign) - sign;
521 if (offset > num_coefs) {
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
int next_block_len_bits
log2 of next block length
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)
Decode run level compressed coefficients.
const uint8_t * huffbits
VLC bit size.
static void init_coef_vlc(VLC *vlc, uint16_t **prun_table, float **plevel_table, uint16_t **pint_table, const CoefVLCTable *vlc_table)
SINETABLE_CONST float *const ff_sine_windows[13]
int n
total number of codes
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
int av_cold ff_wma_get_frame_len_bits(int sample_rate, int version, unsigned int decode_flags)
Get the samples per frame for this stream.
int high_band_start[BLOCK_NB_SIZES]
index of first coef in high band
int exponent_sizes[BLOCK_NB_SIZES]
float WMACoef
type for decoded coefficients, int16_t would be enough for wma 1/2
const uint32_t * huffcodes
VLC bit values.
av_cold void dsputil_init(DSPContext *c, AVCodecContext *avctx)
int nb_block_sizes
number of block sizes
int ff_wma_total_gain_to_bits(int total_gain)
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
uint16_t exponent_bands[BLOCK_NB_SIZES][25]
void av_log(void *avcl, int level, const char *fmt,...)
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]
int ff_wma_end(AVCodecContext *avctx)
int bit_rate
the average bitrate
float * windows[BLOCK_NB_SIZES]
static const uint8_t exponent_band_44100[3][25]
int version
1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
int frame_len
frame length in samples
#define av_dlog(pctx,...)
av_dlog macros Useful to print debug messages that shouldn't get compiled in normally.
int frame_len_bits
frame_len = 1 << frame_len_bits
int sample_rate
samples per second
int use_exp_vlc
exponent coding: 0 = lsp, 1 = vlc + delta
main external API structure.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
int exponent_high_sizes[BLOCK_NB_SIZES]
static unsigned int get_bits1(GetBitContext *s)
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int use_noise_coding
true if perceptual noise is added
int use_variable_block_len
FFTContext mdct_ctx[BLOCK_NB_SIZES]
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
int prev_block_len_bits
log2 of prev block length
int coefs_end[BLOCK_NB_SIZES]
max number of coded coefficients
const uint16_t ff_wma_critical_freqs[25]
FmtConvertContext fmt_conv
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
int channels
number of audio channels
VLC_TYPE(* table)[2]
code, bits
unsigned int ff_wma_get_large_val(GetBitContext *gb)
Decode an uncompressed coefficient.
static const CoefVLCTable coef_vlcs[6]
int coefs_start
first coded coef
int block_len_bits
log2 of current block length
static const uint8_t exponent_band_22050[3][25]
static const uint8_t exponent_band_32000[3][25]
void ff_free_vlc(VLC *vlc)
int ff_wma_init(AVCodecContext *avctx, int flags2)
void ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
float noise_table[NOISE_TAB_SIZE]
const uint16_t * levels
table to build run/level tables