eden-emu/opus
15
0
Fork 0
mirror of https://github.com/xiph/opus.git synced 2025-06-06 07:21:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

More simplifications from denorm pitch

Browse source
This commit is contained in:
Jean-Marc Valin 2009-09-28 19:17:34 -04:00
parent 095c1782c5
commit 4834c92e2b
6 changed files with 25 additions and 89 deletions
Download patch file Download diff file Expand all files Collapse all files

32
libcelt/bands.c
View file

@ -222,7 +222,7 @@ int compute_new_pitch(const CELTMode *m, const celt_sig_t *X, const celt_sig_t *
celt_word16_t g; celt_word16_t g;
const int C = CHANNELS(m); const int C = CHANNELS(m);
celt_word32_t Sxy=0, Sxx=0, Syy=0; celt_word32_t Sxy=0, Sxx=0, Syy=0;
int len = 20*C; int len = m->pitchEnd*C;
#ifdef FIXED_POINT #ifdef FIXED_POINT
int shift = 0; int shift = 0;
celt_word32_t maxabs=0; celt_word32_t maxabs=0;
@ -291,7 +291,7 @@ void apply_new_pitch(const CELTMode *m, celt_sig_t *X, const celt_sig_t *P, int
int j; int j;
celt_word16_t gain; celt_word16_t gain;
const int C = CHANNELS(m); const int C = CHANNELS(m);
int len = 20*C; int len = m->pitchEnd*C;
gain = ADD16(QCONST16(.5,14), MULT16_16_16(QCONST16(.05,14),gain_id)); gain = ADD16(QCONST16(.5,14), MULT16_16_16(QCONST16(.05,14),gain_id));
if (pred) if (pred)
gain = -gain; gain = -gain;
@ -415,7 +415,7 @@ int folding_decision(const CELTMode *m, celt_norm_t *X, celt_word16_t *average,
floor_ener -= MULT16_16(x[max_i-2], x[max_i-2]); floor_ener -= MULT16_16(x[max_i-2], x[max_i-2]);
floor_ener = MAX32(floor_ener, EPSILON); floor_ener = MAX32(floor_ener, EPSILON);
#endif #endif
if (N>7 && eBands[i] >= m->pitchEnd) if (N>7)
{ {
celt_word16_t r; celt_word16_t r;
celt_word16_t den = celt_sqrt(floor_ener); celt_word16_t den = celt_sqrt(floor_ener);
@ -439,7 +439,7 @@ int folding_decision(const CELTMode *m, celt_norm_t *X, celt_word16_t *average,
} }
/* Quantisation of the residual */ /* Quantisation of the residual */
void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc) void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc)
{ {
int i, j, remaining_bits, balance; int i, j, remaining_bits, balance;
const celt_int16_t * restrict eBands = m->eBands; const celt_int16_t * restrict eBands = m->eBands;
@ -490,7 +490,7 @@ void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, ce
if (q > 0) if (q > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_quant(X+eBands[i], eBands[i+1]-eBands[i], q, spread, enc); alg_quant(X+eBands[i], eBands[i+1]-eBands[i], q, spread, enc);
} else { } else {
intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B); intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B);
@ -503,14 +503,13 @@ void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, ce
#ifndef DISABLE_STEREO #ifndef DISABLE_STEREO
void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc) void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc)
{ {
int i, j, remaining_bits, balance; int i, j, remaining_bits, balance;
const celt_int16_t * restrict eBands = m->eBands; const celt_int16_t * restrict eBands = m->eBands;
celt_norm_t * restrict norm; celt_norm_t * restrict norm;
VARDECL(celt_norm_t, _norm); VARDECL(celt_norm_t, _norm);
const int C = CHANNELS(m); const int C = CHANNELS(m);
int pband=-1;
int B; int B;
celt_word16_t mid, side; celt_word16_t mid, side;
SAVE_STACK; SAVE_STACK;
@ -625,7 +624,7 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t
if (q1 > 0) if (q1 > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_quant(v, N, q1, spread, enc); alg_quant(v, N, q1, spread, enc);
} else { } else {
v[0] = QCONST16(1.f, 14); v[0] = QCONST16(1.f, 14);
@ -689,13 +688,13 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t
} }
deinterleave(X+C*eBands[i], C*N); deinterleave(X+C*eBands[i], C*N);
if (q1 > 0) { if (q1 > 0) {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_quant(X+C*eBands[i], N, q1, spread, enc); alg_quant(X+C*eBands[i], N, q1, spread, enc);
} else } else
for (j=C*eBands[i];j<C*eBands[i]+N;j++) for (j=C*eBands[i];j<C*eBands[i]+N;j++)
X[j] = P[j]; X[j] = P[j];
if (q2 > 0) { if (q2 > 0) {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_quant(X+C*eBands[i]+N, N, q2, spread, enc); alg_quant(X+C*eBands[i]+N, N, q2, spread, enc);
} else } else
for (j=C*eBands[i]+N;j<C*eBands[i+1];j++) for (j=C*eBands[i]+N;j<C*eBands[i+1];j++)
@ -732,7 +731,7 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t
#endif /* DISABLE_STEREO */ #endif /* DISABLE_STEREO */
/* Decoding of the residual */ /* Decoding of the residual */
void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec) void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec)
{ {
int i, j, remaining_bits, balance; int i, j, remaining_bits, balance;
const celt_int16_t * restrict eBands = m->eBands; const celt_int16_t * restrict eBands = m->eBands;
@ -783,7 +782,7 @@ void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P,
if (q > 0) if (q > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_unquant(X+eBands[i], eBands[i+1]-eBands[i], q, spread, dec); alg_unquant(X+eBands[i], eBands[i+1]-eBands[i], q, spread, dec);
} else { } else {
intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B); intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B);
@ -796,14 +795,13 @@ void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P,
#ifndef DISABLE_STEREO #ifndef DISABLE_STEREO
void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec) void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec)
{ {
int i, j, remaining_bits, balance; int i, j, remaining_bits, balance;
const celt_int16_t * restrict eBands = m->eBands; const celt_int16_t * restrict eBands = m->eBands;
celt_norm_t * restrict norm; celt_norm_t * restrict norm;
VARDECL(celt_norm_t, _norm); VARDECL(celt_norm_t, _norm);
const int C = CHANNELS(m); const int C = CHANNELS(m);
int pband=-1;
int B; int B;
celt_word16_t mid, side; celt_word16_t mid, side;
SAVE_STACK; SAVE_STACK;
@ -907,7 +905,7 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm
if (q1 > 0) if (q1 > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_unquant(v, N, q1, spread, dec); alg_unquant(v, N, q1, spread, dec);
} else { } else {
v[0] = QCONST16(1.f, 14); v[0] = QCONST16(1.f, 14);
@ -967,14 +965,14 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm
deinterleave(X+C*eBands[i], C*N); deinterleave(X+C*eBands[i], C*N);
if (q1 > 0) if (q1 > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_unquant(X+C*eBands[i], N, q1, spread, dec); alg_unquant(X+C*eBands[i], N, q1, spread, dec);
} else } else
for (j=C*eBands[i];j<C*eBands[i]+N;j++) for (j=C*eBands[i];j<C*eBands[i]+N;j++)
X[j] = P[j]; X[j] = P[j];
if (q2 > 0) if (q2 > 0)
{ {
int spread = (eBands[i] >= m->pitchEnd && fold) ? B : 0; int spread = fold ? B : 0;
alg_unquant(X+C*eBands[i]+N, N, q2, spread, dec); alg_unquant(X+C*eBands[i]+N, N, q2, spread, dec);
} else } else
for (j=C*eBands[i]+N;j<C*eBands[i+1];j++) for (j=C*eBands[i]+N;j<C*eBands[i+1];j++)

8
libcelt/bands.h
View file

@ -87,9 +87,9 @@ int folding_decision(const CELTMode *m, celt_norm_t *X, celt_word16_t *average,
* @param total_bits Total number of bits that can be used for the frame (including the ones already spent) * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
* @param enc Entropy encoder * @param enc Entropy encoder
*/ */
void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc); void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc);
void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc); void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc);
/** Decoding of the residual spectrum /** Decoding of the residual spectrum
* @param m Mode data * @param m Mode data
@ -98,9 +98,9 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t
* @param total_bits Total number of bits that can be used for the frame (including the ones already spent) * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
* @param dec Entropy decoder * @param dec Entropy decoder
*/ */
void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec); void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec);
void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec); void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec);
void stereo_decision(const CELTMode *m, celt_norm_t * restrict X, int *stereo_mode, int len); void stereo_decision(const CELTMode *m, celt_norm_t * restrict X, int *stereo_mode, int len);

16
libcelt/celt.c
View file

@ -509,7 +509,6 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig_t * pcm, celt_si
VARDECL(celt_norm_t, P); VARDECL(celt_norm_t, P);
VARDECL(celt_ener_t, bandE); VARDECL(celt_ener_t, bandE);
VARDECL(celt_word16_t, bandLogE); VARDECL(celt_word16_t, bandLogE);
VARDECL(celt_pgain_t, gains);
VARDECL(int, fine_quant); VARDECL(int, fine_quant);
VARDECL(celt_word16_t, error); VARDECL(celt_word16_t, error);
VARDECL(int, pulses); VARDECL(int, pulses);
@ -676,7 +675,6 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig_t * pcm, celt_si
the peak memory usage */ the peak memory usage */
ALLOC(X, C*N, celt_norm_t); /**< Interleaved normalised MDCTs */ ALLOC(X, C*N, celt_norm_t); /**< Interleaved normalised MDCTs */
ALLOC(P, C*N, celt_norm_t); /**< Interleaved normalised pitch MDCTs*/ ALLOC(P, C*N, celt_norm_t); /**< Interleaved normalised pitch MDCTs*/
ALLOC(gains,st->mode->nbPBands, celt_pgain_t);
ALLOC(pitch_freq, C*N, celt_sig_t); /**< Interleaved signal MDCTs */ ALLOC(pitch_freq, C*N, celt_sig_t); /**< Interleaved signal MDCTs */
if (has_pitch) if (has_pitch)
@ -712,8 +710,6 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig_t * pcm, celt_si
ec_enc_uint(&enc, pitch_index, MAX_PERIOD-(2*N-2*N4)); ec_enc_uint(&enc, pitch_index, MAX_PERIOD-(2*N-2*N4));
ec_enc_uint(&enc, gain_id, 16); ec_enc_uint(&enc, gain_id, 16);
} else { } else {
for (i=0;i<st->mode->nbPBands;i++)
gains[i] = 0;
for (i=0;i<C*N;i++) for (i=0;i<C*N;i++)
P[i] = 0; P[i] = 0;
} }
@ -773,10 +769,10 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig_t * pcm, celt_si
/* Residual quantisation */ /* Residual quantisation */
if (C==1) if (C==1)
quant_bands(st->mode, X, P, NULL, 0, gains, bandE, pulses, shortBlocks, has_fold, nbCompressedBytes*8, &enc); quant_bands(st->mode, X, P, bandE, pulses, shortBlocks, has_fold, nbCompressedBytes*8, &enc);
#ifndef DISABLE_STEREO #ifndef DISABLE_STEREO
else else
quant_bands_stereo(st->mode, X, P, NULL, 0, gains, bandE, pulses, shortBlocks, has_fold, nbCompressedBytes*8, &enc); quant_bands_stereo(st->mode, X, P, bandE, pulses, shortBlocks, has_fold, nbCompressedBytes*8, &enc);
#endif #endif
quant_energy_finalise(st->mode, bandE, st->oldBandE, error, fine_quant, fine_priority, nbCompressedBytes*8-ec_enc_tell(&enc, 0), &enc); quant_energy_finalise(st->mode, bandE, st->oldBandE, error, fine_quant, fine_priority, nbCompressedBytes*8-ec_enc_tell(&enc, 0), &enc);
@ -1211,7 +1207,6 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
VARDECL(celt_norm_t, X); VARDECL(celt_norm_t, X);
VARDECL(celt_norm_t, P); VARDECL(celt_norm_t, P);
VARDECL(celt_ener_t, bandE); VARDECL(celt_ener_t, bandE);
VARDECL(celt_pgain_t, gains);
VARDECL(int, fine_quant); VARDECL(int, fine_quant);
VARDECL(int, pulses); VARDECL(int, pulses);
VARDECL(int, offsets); VARDECL(int, offsets);
@ -1243,7 +1238,6 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
ALLOC(X, C*N, celt_norm_t); /**< Interleaved normalised MDCTs */ ALLOC(X, C*N, celt_norm_t); /**< Interleaved normalised MDCTs */
ALLOC(P, C*N, celt_norm_t); /**< Interleaved normalised pitch MDCTs*/ ALLOC(P, C*N, celt_norm_t); /**< Interleaved normalised pitch MDCTs*/
ALLOC(bandE, st->mode->nbEBands*C, celt_ener_t); ALLOC(bandE, st->mode->nbEBands*C, celt_ener_t);
ALLOC(gains, st->mode->nbPBands, celt_pgain_t);
if (data == NULL) if (data == NULL)
{ {
@ -1286,8 +1280,6 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
gain_id = ec_dec_uint(&dec, 16); gain_id = ec_dec_uint(&dec, 16);
} else { } else {
pitch_index = 0; pitch_index = 0;
for (i=0;i<st->mode->nbPBands;i++)
gains[i] = 0;
} }
ALLOC(fine_quant, st->mode->nbEBands, int); ALLOC(fine_quant, st->mode->nbEBands, int);
@ -1317,10 +1309,10 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
/* Decode fixed codebook and merge with pitch */ /* Decode fixed codebook and merge with pitch */
if (C==1) if (C==1)
unquant_bands(st->mode, X, P, 0, gains, bandE, pulses, shortBlocks, has_fold, len*8, &dec); unquant_bands(st->mode, X, P, bandE, pulses, shortBlocks, has_fold, len*8, &dec);
#ifndef DISABLE_STEREO #ifndef DISABLE_STEREO
else else
unquant_bands_stereo(st->mode, X, P, 0, gains, bandE, pulses, shortBlocks, has_fold, len*8, &dec); unquant_bands_stereo(st->mode, X, P, bandE, pulses, shortBlocks, has_fold, len*8, &dec);
#endif #endif
unquant_energy_finalise(st->mode, bandE, st->oldBandE, fine_quant, fine_priority, len*8-ec_dec_tell(&dec, 0), &dec); unquant_energy_finalise(st->mode, bandE, st->oldBandE, fine_quant, fine_priority, len*8-ec_dec_tell(&dec, 0), &dec);

12
libcelt/dump_modes.c
View file

@ -73,16 +73,6 @@ void dump_modes(FILE *file, CELTMode **modes, int nb_modes)
fprintf(file, "\n"); fprintf(file, "\n");
fprintf(file, "#ifndef DEF_PBANDS%d_%d\n", mode->Fs, mode->mdctSize);
fprintf(file, "#define DEF_PBANDS%d_%d\n", mode->Fs, mode->mdctSize);
fprintf (file, "static const celt_int16_t pBands%d_%d[%d] = {\n", mode->Fs, mode->mdctSize, mode->nbPBands+2);
for (j=0;j<mode->nbPBands+2;j++)
fprintf (file, "%d, ", mode->pBands[j]);
fprintf (file, "};\n");
fprintf(file, "#endif\n");
fprintf(file, "\n");
fprintf(file, "#ifndef DEF_WINDOW%d\n", mode->overlap); fprintf(file, "#ifndef DEF_WINDOW%d\n", mode->overlap);
fprintf(file, "#define DEF_WINDOW%d\n", mode->overlap); fprintf(file, "#define DEF_WINDOW%d\n", mode->overlap);
fprintf (file, "static const celt_word16_t window%d[%d] = {\n", mode->overlap, mode->overlap); fprintf (file, "static const celt_word16_t window%d[%d] = {\n", mode->overlap, mode->overlap);
@ -148,10 +138,8 @@ void dump_modes(FILE *file, CELTMode **modes, int nb_modes)
fprintf(file, "%d,\t/* mdctSize */\n", mode->mdctSize); fprintf(file, "%d,\t/* mdctSize */\n", mode->mdctSize);
fprintf(file, "%d,\t/* nbChannels */\n", mode->nbChannels); fprintf(file, "%d,\t/* nbChannels */\n", mode->nbChannels);
fprintf(file, "%d,\t/* nbEBands */\n", mode->nbEBands); fprintf(file, "%d,\t/* nbEBands */\n", mode->nbEBands);
fprintf(file, "%d,\t/* nbPBands */\n", mode->nbPBands);
fprintf(file, "%d,\t/* pitchEnd */\n", mode->pitchEnd); fprintf(file, "%d,\t/* pitchEnd */\n", mode->pitchEnd);
fprintf(file, "eBands%d_%d,\t/* eBands */\n", mode->Fs, mode->mdctSize); fprintf(file, "eBands%d_%d,\t/* eBands */\n", mode->Fs, mode->mdctSize);
fprintf(file, "pBands%d_%d,\t/* pBands */\n", mode->Fs, mode->mdctSize);
fprintf(file, WORD16 ",\t/* ePredCoef */\n", mode->ePredCoef); fprintf(file, WORD16 ",\t/* ePredCoef */\n", mode->ePredCoef);
fprintf(file, "%d,\t/* nbAllocVectors */\n", mode->nbAllocVectors); fprintf(file, "%d,\t/* nbAllocVectors */\n", mode->nbAllocVectors);
fprintf(file, "allocVectors%d_%d_%d,\t/* allocVectors */\n", mode->Fs, mode->mdctSize, mode->nbChannels); fprintf(file, "allocVectors%d_%d_%d,\t/* allocVectors */\n", mode->Fs, mode->mdctSize, mode->nbChannels);

44
libcelt/modes.c
View file

@ -82,8 +82,6 @@ int celt_mode_info(const CELTMode *mode, int request, celt_int32_t *value)
#ifndef STATIC_MODES #ifndef STATIC_MODES
#define PBANDS 8
/* Defining 25 critical bands for the full 0-20 kHz audio bandwidth /* Defining 25 critical bands for the full 0-20 kHz audio bandwidth
Taken from http://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html */ Taken from http://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html */
#define BARK_BANDS 25 #define BARK_BANDS 25
@ -95,8 +93,6 @@ static const celt_int16_t bark_freq[BARK_BANDS+1] = {
6400, 7700, 9500, 12000, 15500, 6400, 7700, 9500, 12000, 15500,
20000}; 20000};
static const celt_int16_t pitch_freq[PBANDS+1] ={0, 345, 689, 1034, 1378, 2067, 3273, 5340, 6374};
/* This allocation table is per critical band. When creating a mode, the bits get added together /* This allocation table is per critical band. When creating a mode, the bits get added together
into the codec bands, which are sometimes larger than one critical band at low frequency */ into the codec bands, which are sometimes larger than one critical band at low frequency */
@ -179,40 +175,6 @@ static celt_int16_t *compute_ebands(celt_int32_t Fs, int frame_size, int nbShort
return eBands; return eBands;
} }
static void compute_pbands(CELTMode *mode, int res)
{
int i;
celt_int16_t *pBands;
pBands=celt_alloc(sizeof(celt_int16_t)*(PBANDS+2));
mode->pBands = pBands;
if (pBands==NULL)
return;
mode->nbPBands = PBANDS;
for (i=0;i<PBANDS+1;i++)
{
pBands[i] = (pitch_freq[i]+res/2)/res;
if (pBands[i] < mode->eBands[i])
pBands[i] = mode->eBands[i];
}
pBands[PBANDS+1] = mode->eBands[mode->nbEBands+1];
for (i=1;i<mode->nbPBands+1;i++)
{
int j;
for (j=0;j<mode->nbEBands;j++)
if (mode->eBands[j] <= pBands[i] && mode->eBands[j+1] > pBands[i])
break;
if (mode->eBands[j] != pBands[i])
{
if (pBands[i]-mode->eBands[j] < mode->eBands[j+1]-pBands[i] &&
mode->eBands[j] != pBands[i-1])
pBands[i] = mode->eBands[j];
else
pBands[i] = mode->eBands[j+1];
}
}
mode->pitchEnd = pBands[PBANDS];
}
static void compute_allocation_table(CELTMode *mode, int res) static void compute_allocation_table(CELTMode *mode, int res)
{ {
int i, j, nBark; int i, j, nBark;
@ -382,9 +344,8 @@ CELTMode *celt_mode_create(celt_int32_t Fs, int channels, int frame_size, int *e
mode->eBands = compute_ebands(Fs, frame_size, mode->nbShortMdcts, &mode->nbEBands); mode->eBands = compute_ebands(Fs, frame_size, mode->nbShortMdcts, &mode->nbEBands);
if (mode->eBands==NULL) if (mode->eBands==NULL)
goto failure; goto failure;
compute_pbands(mode, res);
if (mode->pBands==NULL) mode->pitchEnd = 3000*(celt_int32_t)frame_size/Fs;
goto failure;
/* Overlap must be divisible by 4 */ /* Overlap must be divisible by 4 */
if (mode->nbShortMdcts > 1) if (mode->nbShortMdcts > 1)
@ -494,7 +455,6 @@ void celt_mode_destroy(CELTMode *mode)
} }
celt_free((int**)mode->bits); celt_free((int**)mode->bits);
celt_free((int*)mode->eBands); celt_free((int*)mode->eBands);
celt_free((int*)mode->pBands);
celt_free((int*)mode->allocVectors); celt_free((int*)mode->allocVectors);
celt_free((celt_word16_t*)mode->window); celt_free((celt_word16_t*)mode->window);

2
libcelt/modes.h
View file

@ -76,11 +76,9 @@ struct CELTMode {
int nbChannels; int nbChannels;
int nbEBands; int nbEBands;
int nbPBands;
int pitchEnd; int pitchEnd;
const celt_int16_t *eBands; /**< Definition for each "pseudo-critical band" */ const celt_int16_t *eBands; /**< Definition for each "pseudo-critical band" */
const celt_int16_t *pBands; /**< Definition of the bands used for the pitch */
celt_word16_t ePredCoef;/**< Prediction coefficient for the energy encoding */ celt_word16_t ePredCoef;/**< Prediction coefficient for the energy encoding */