35 float **plevel_table, uint16_t **pint_table,
40 const uint32_t *table_codes = vlc_table->
huffcodes;
41 const uint16_t *levels_table = vlc_table->
levels;
42 uint16_t *run_table, *level_table, *int_table;
44 int i, l, j, k,
level;
52 if (!run_table || !level_table || !flevel_table || !int_table) {
64 l = levels_table[k++];
65 for (j = 0; j < l; j++) {
67 level_table[i] =
level;
68 flevel_table[i] =
level;
73 *prun_table = run_table;
74 *plevel_table = flevel_table;
75 *pint_table = int_table;
85 float bps1, high_freq;
111 nb = ((flags2 >> 3) & 3) + 1;
128 if (sample_rate1 >= 44100)
129 sample_rate1 = 44100;
130 else if (sample_rate1 >= 22050)
131 sample_rate1 = 22050;
132 else if (sample_rate1 >= 16000)
133 sample_rate1 = 16000;
134 else if (sample_rate1 >= 11025)
135 sample_rate1 = 11025;
136 else if (sample_rate1 >= 8000)
153 if (sample_rate1 == 44100) {
157 high_freq = high_freq * 0.4;
158 }
else if (sample_rate1 == 22050) {
161 else if (bps1 >= 0.72)
162 high_freq = high_freq * 0.7;
164 high_freq = high_freq * 0.6;
165 }
else if (sample_rate1 == 16000) {
167 high_freq = high_freq * 0.5;
169 high_freq = high_freq * 0.3;
170 }
else if (sample_rate1 == 11025)
171 high_freq = high_freq * 0.7;
172 else if (sample_rate1 == 8000) {
174 high_freq = high_freq * 0.5;
178 high_freq = high_freq * 0.65;
181 high_freq = high_freq * 0.75;
183 high_freq = high_freq * 0.6;
185 high_freq = high_freq * 0.5;
188 ff_dlog(s->
avctx,
"version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
191 ff_dlog(s->
avctx,
"bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
193 ff_dlog(s->
avctx,
"use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
198 int a,
b, pos, lpos, k, block_len, i, j,
n;
210 for (i = 0; i < 25; i++) {
213 pos = ((block_len * 2 *
a) + (b >> 1)) / b;
217 if (pos >= block_len) {
238 for (i = 0; i <
n; i++)
244 for (i = 0; i < 25; i++) {
247 pos = ((block_len * 2 *
a) + (b << 1)) / (4 * b);
253 if (pos >= block_len)
269 for (i = 0; i <
n; i++) {
274 if (start < s->high_band_start[k])
283 ff_tlog(s->
avctx,
"%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
332 norm = (1.0 / (
float) (1LL << 31)) * sqrt(3) * s->
noise_mult;
347 if (avctx->sample_rate >= 32000) {
350 else if (bps1 < 1.16)
353 s->coef_vlcs[0] = &
coef_vlcs[coef_vlc_table * 2];
354 s->coef_vlcs[1] = &
coef_vlcs[coef_vlc_table * 2 + 1];
356 &
s->int_table[0],
s->coef_vlcs[0]);
361 &
s->int_table[1],
s->coef_vlcs[1]);
368 else if (total_gain < 32)
370 else if (total_gain < 40)
372 else if (total_gain < 45)
390 for (i = 0; i < 2; i++) {
439 VLC *vlc,
const float *level_table,
440 const uint16_t *run_table,
int version,
442 int block_len,
int frame_len_bits,
445 int code,
level, sign;
446 const uint32_t *ilvl = (
const uint32_t *) level_table;
447 uint32_t *iptr = (uint32_t *) ptr;
448 const unsigned int coef_mask = block_len - 1;
449 for (; offset < num_coefs; offset++) {
453 offset += run_table[code];
455 iptr[offset & coef_mask] = ilvl[code] ^ (sign & 0x80000000);
456 }
else if (code == 1) {
465 offset +=
get_bits(gb, frame_len_bits);
473 "broken escape sequence\n");
476 offset +=
get_bits(gb, frame_len_bits) + 4;
482 ptr[offset & coef_mask] = (level ^ sign) - sign;
486 if (offset > num_coefs) {
488 "overflow (%d > %d) in spectral RLE, ignoring\n",
const struct AVCodec * codec
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 uint16_t ff_wma_critical_freqs[25]
const uint8_t * huffbits
VLC bit size.
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...
Macro definitions for various function/variable attributes.
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
static av_cold int end(AVCodecContext *avctx)
const uint32_t * huffcodes
VLC bit values.
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
int nb_block_sizes
number of block sizes
int ff_wma_total_gain_to_bits(int total_gain)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const struct endianess table[]
uint16_t exponent_bands[BLOCK_NB_SIZES][25]
static const uint8_t offset[127][2]
Libavcodec external API header.
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]
int ff_wma_end(AVCodecContext *avctx)
int bit_rate
the average bitrate
static const uint8_t exponent_band_44100[3][25]
av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
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 AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
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 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)
int use_noise_coding
true if perceptual noise is added
SINETABLE_CONST float *const ff_sine_windows[14]
int use_variable_block_len
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
FFTContext mdct_ctx[BLOCK_NB_SIZES]
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
av_cold int ff_wma_get_frame_len_bits(int sample_rate, int version, unsigned int decode_flags)
Get the samples per frame for this stream.
int prev_block_len_bits
log2 of prev block length
int coefs_end[BLOCK_NB_SIZES]
max number of coded coefficients
common internal api header.
int channels
number of audio channels
VLC_TYPE(* table)[2]
code, bits
static av_cold int init_coef_vlc(VLC *vlc, uint16_t **prun_table, float **plevel_table, uint16_t **pint_table, const CoefVLCTable *vlc_table)
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
#define av_malloc_array(a, b)
static const uint8_t exponent_band_22050[3][25]
static const uint8_t exponent_band_32000[3][25]
void ff_free_vlc(VLC *vlc)
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
const float * windows[BLOCK_NB_SIZES]