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-rw-r--r--libs/libopus/src/opus_encoder.c1401
1 files changed, 819 insertions, 582 deletions
diff --git a/libs/libopus/src/opus_encoder.c b/libs/libopus/src/opus_encoder.c
index 9a516a884..253fe9e88 100644
--- a/libs/libopus/src/opus_encoder.c
+++ b/libs/libopus/src/opus_encoder.c
@@ -53,6 +53,10 @@
#define MAX_ENCODER_BUFFER 480
+#ifndef DISABLE_FLOAT_API
+#define PSEUDO_SNR_THRESHOLD 316.23f /* 10^(25/10) */
+#endif
+
typedef struct {
opus_val32 XX, XY, YY;
opus_val16 smoothed_width;
@@ -82,6 +86,7 @@ struct OpusEncoder {
int encoder_buffer;
int lfe;
int arch;
+ int use_dtx; /* general DTX for both SILK and CELT */
#ifndef DISABLE_FLOAT_API
TonalityAnalysisState analysis;
#endif
@@ -97,6 +102,8 @@ struct OpusEncoder {
int prev_channels;
int prev_framesize;
int bandwidth;
+ /* Bandwidth determined automatically from the rate (before any other adjustment) */
+ int auto_bandwidth;
int silk_bw_switch;
/* Sampling rate (at the API level) */
int first;
@@ -105,7 +112,10 @@ struct OpusEncoder {
opus_val16 delay_buffer[MAX_ENCODER_BUFFER*2];
#ifndef DISABLE_FLOAT_API
int detected_bandwidth;
+ int nb_no_activity_ms_Q1;
+ opus_val32 peak_signal_energy;
#endif
+ int nonfinal_frame; /* current frame is not the final in a packet */
opus_uint32 rangeFinal;
};
@@ -113,38 +123,46 @@ struct OpusEncoder {
middle (memoriless) threshold. The second column is the hysteresis
(difference with the middle) */
static const opus_int32 mono_voice_bandwidth_thresholds[8] = {
- 11000, 1000, /* NB<->MB */
- 14000, 1000, /* MB<->WB */
- 17000, 1000, /* WB<->SWB */
- 21000, 2000, /* SWB<->FB */
+ 9000, 700, /* NB<->MB */
+ 9000, 700, /* MB<->WB */
+ 13500, 1000, /* WB<->SWB */
+ 14000, 2000, /* SWB<->FB */
};
static const opus_int32 mono_music_bandwidth_thresholds[8] = {
- 12000, 1000, /* NB<->MB */
- 15000, 1000, /* MB<->WB */
- 18000, 2000, /* WB<->SWB */
- 22000, 2000, /* SWB<->FB */
+ 9000, 700, /* NB<->MB */
+ 9000, 700, /* MB<->WB */
+ 11000, 1000, /* WB<->SWB */
+ 12000, 2000, /* SWB<->FB */
};
static const opus_int32 stereo_voice_bandwidth_thresholds[8] = {
- 11000, 1000, /* NB<->MB */
- 14000, 1000, /* MB<->WB */
- 21000, 2000, /* WB<->SWB */
- 28000, 2000, /* SWB<->FB */
+ 9000, 700, /* NB<->MB */
+ 9000, 700, /* MB<->WB */
+ 13500, 1000, /* WB<->SWB */
+ 14000, 2000, /* SWB<->FB */
};
static const opus_int32 stereo_music_bandwidth_thresholds[8] = {
- 12000, 1000, /* NB<->MB */
- 18000, 2000, /* MB<->WB */
- 21000, 2000, /* WB<->SWB */
- 30000, 2000, /* SWB<->FB */
+ 9000, 700, /* NB<->MB */
+ 9000, 700, /* MB<->WB */
+ 11000, 1000, /* WB<->SWB */
+ 12000, 2000, /* SWB<->FB */
};
/* Threshold bit-rates for switching between mono and stereo */
-static const opus_int32 stereo_voice_threshold = 30000;
-static const opus_int32 stereo_music_threshold = 30000;
+static const opus_int32 stereo_voice_threshold = 19000;
+static const opus_int32 stereo_music_threshold = 17000;
/* Threshold bit-rate for switching between SILK/hybrid and CELT-only */
static const opus_int32 mode_thresholds[2][2] = {
/* voice */ /* music */
- { 64000, 16000}, /* mono */
- { 36000, 16000}, /* stereo */
+ { 64000, 10000}, /* mono */
+ { 44000, 10000}, /* stereo */
+};
+
+static const opus_int32 fec_thresholds[] = {
+ 12000, 1000, /* NB */
+ 14000, 1000, /* MB */
+ 16000, 1000, /* WB */
+ 20000, 1000, /* SWB */
+ 22000, 1000, /* FB */
};
int opus_encoder_get_size(int channels)
@@ -245,7 +263,8 @@ int opus_encoder_init(OpusEncoder* st, opus_int32 Fs, int channels, int applicat
st->bandwidth = OPUS_BANDWIDTH_FULLBAND;
#ifndef DISABLE_FLOAT_API
- tonality_analysis_init(&st->analysis);
+ tonality_analysis_init(&st->analysis, st->Fs);
+ st->analysis.application = st->application;
#endif
return OPUS_OK;
@@ -323,10 +342,11 @@ static void silk_biquad_float(
}
#endif
-static void hp_cutoff(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *out, opus_val32 *hp_mem, int len, int channels, opus_int32 Fs)
+static void hp_cutoff(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *out, opus_val32 *hp_mem, int len, int channels, opus_int32 Fs, int arch)
{
opus_int32 B_Q28[ 3 ], A_Q28[ 2 ];
opus_int32 Fc_Q19, r_Q28, r_Q22;
+ (void)arch;
silk_assert( cutoff_Hz <= silk_int32_MAX / SILK_FIX_CONST( 1.5 * 3.14159 / 1000, 19 ) );
Fc_Q19 = silk_DIV32_16( silk_SMULBB( SILK_FIX_CONST( 1.5 * 3.14159 / 1000, 19 ), cutoff_Hz ), Fs/1000 );
@@ -346,9 +366,10 @@ static void hp_cutoff(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *ou
A_Q28[ 1 ] = silk_SMULWW( r_Q22, r_Q22 );
#ifdef FIXED_POINT
- silk_biquad_alt( in, B_Q28, A_Q28, hp_mem, out, len, channels );
- if( channels == 2 ) {
- silk_biquad_alt( in+1, B_Q28, A_Q28, hp_mem+2, out+1, len, channels );
+ if( channels == 1 ) {
+ silk_biquad_alt_stride1( in, B_Q28, A_Q28, hp_mem, out, len );
+ } else {
+ silk_biquad_alt_stride2( in, B_Q28, A_Q28, hp_mem, out, len, arch );
}
#else
silk_biquad_float( in, B_Q28, A_Q28, hp_mem, out, len, channels );
@@ -364,21 +385,17 @@ static void dc_reject(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *ou
int c, i;
int shift;
- /* Approximates -round(log2(4.*cutoff_Hz/Fs)) */
- shift=celt_ilog2(Fs/(cutoff_Hz*3));
+ /* Approximates -round(log2(6.3*cutoff_Hz/Fs)) */
+ shift=celt_ilog2(Fs/(cutoff_Hz*4));
for (c=0;c<channels;c++)
{
for (i=0;i<len;i++)
{
- opus_val32 x, tmp, y;
- x = SHL32(EXTEND32(in[channels*i+c]), 15);
- /* First stage */
- tmp = x-hp_mem[2*c];
+ opus_val32 x, y;
+ x = SHL32(EXTEND32(in[channels*i+c]), 14);
+ y = x-hp_mem[2*c];
hp_mem[2*c] = hp_mem[2*c] + PSHR32(x - hp_mem[2*c], shift);
- /* Second stage */
- y = tmp - hp_mem[2*c+1];
- hp_mem[2*c+1] = hp_mem[2*c+1] + PSHR32(tmp - hp_mem[2*c+1], shift);
- out[channels*i+c] = EXTRACT16(SATURATE(PSHR32(y, 15), 32767));
+ out[channels*i+c] = EXTRACT16(SATURATE(PSHR32(y, 14), 32767));
}
}
}
@@ -386,24 +403,41 @@ static void dc_reject(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *ou
#else
static void dc_reject(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *out, opus_val32 *hp_mem, int len, int channels, opus_int32 Fs)
{
- int c, i;
- float coef;
-
- coef = 4.0f*cutoff_Hz/Fs;
- for (c=0;c<channels;c++)
+ int i;
+ float coef, coef2;
+ coef = 6.3f*cutoff_Hz/Fs;
+ coef2 = 1-coef;
+ if (channels==2)
{
+ float m0, m2;
+ m0 = hp_mem[0];
+ m2 = hp_mem[2];
for (i=0;i<len;i++)
{
- opus_val32 x, tmp, y;
- x = in[channels*i+c];
- /* First stage */
- tmp = x-hp_mem[2*c];
- hp_mem[2*c] = hp_mem[2*c] + coef*(x - hp_mem[2*c]) + VERY_SMALL;
- /* Second stage */
- y = tmp - hp_mem[2*c+1];
- hp_mem[2*c+1] = hp_mem[2*c+1] + coef*(tmp - hp_mem[2*c+1]) + VERY_SMALL;
- out[channels*i+c] = y;
+ opus_val32 x0, x1, out0, out1;
+ x0 = in[2*i+0];
+ x1 = in[2*i+1];
+ out0 = x0-m0;
+ out1 = x1-m2;
+ m0 = coef*x0 + VERY_SMALL + coef2*m0;
+ m2 = coef*x1 + VERY_SMALL + coef2*m2;
+ out[2*i+0] = out0;
+ out[2*i+1] = out1;
}
+ hp_mem[0] = m0;
+ hp_mem[2] = m2;
+ } else {
+ float m0;
+ m0 = hp_mem[0];
+ for (i=0;i<len;i++)
+ {
+ opus_val32 x, y;
+ x = in[i];
+ y = x-m0;
+ m0 = coef*x + VERY_SMALL + coef2*m0;
+ out[i] = y;
+ }
+ hp_mem[0] = m0;
}
}
#endif
@@ -521,287 +555,57 @@ static opus_int32 user_bitrate_to_bitrate(OpusEncoder *st, int frame_size, int m
}
#ifndef DISABLE_FLOAT_API
-/* Don't use more than 60 ms for the frame size analysis */
-#define MAX_DYNAMIC_FRAMESIZE 24
-/* Estimates how much the bitrate will be boosted based on the sub-frame energy */
-static float transient_boost(const float *E, const float *E_1, int LM, int maxM)
-{
- int i;
- int M;
- float sumE=0, sumE_1=0;
- float metric;
-
- M = IMIN(maxM, (1<<LM)+1);
- for (i=0;i<M;i++)
- {
- sumE += E[i];
- sumE_1 += E_1[i];
- }
- metric = sumE*sumE_1/(M*M);
- /*if (LM==3)
- printf("%f\n", metric);*/
- /*return metric>10 ? 1 : 0;*/
- /*return MAX16(0,1-exp(-.25*(metric-2.)));*/
- return MIN16(1,(float)sqrt(MAX16(0,.05f*(metric-2))));
-}
-
-/* Viterbi decoding trying to find the best frame size combination using look-ahead
-
- State numbering:
- 0: unused
- 1: 2.5 ms
- 2: 5 ms (#1)
- 3: 5 ms (#2)
- 4: 10 ms (#1)
- 5: 10 ms (#2)
- 6: 10 ms (#3)
- 7: 10 ms (#4)
- 8: 20 ms (#1)
- 9: 20 ms (#2)
- 10: 20 ms (#3)
- 11: 20 ms (#4)
- 12: 20 ms (#5)
- 13: 20 ms (#6)
- 14: 20 ms (#7)
- 15: 20 ms (#8)
-*/
-static int transient_viterbi(const float *E, const float *E_1, int N, int frame_cost, int rate)
-{
- int i;
- float cost[MAX_DYNAMIC_FRAMESIZE][16];
- int states[MAX_DYNAMIC_FRAMESIZE][16];
- float best_cost;
- int best_state;
- float factor;
- /* Take into account that we damp VBR in the 32 kb/s to 64 kb/s range. */
- if (rate<80)
- factor=0;
- else if (rate>160)
- factor=1;
- else
- factor = (rate-80.f)/80.f;
- /* Makes variable framesize less aggressive at lower bitrates, but I can't
- find any valid theoretical justification for this (other than it seems
- to help) */
- for (i=0;i<16;i++)
- {
- /* Impossible state */
- states[0][i] = -1;
- cost[0][i] = 1e10;
- }
- for (i=0;i<4;i++)
- {
- cost[0][1<<i] = (frame_cost + rate*(1<<i))*(1+factor*transient_boost(E, E_1, i, N+1));
- states[0][1<<i] = i;
- }
- for (i=1;i<N;i++)
- {
- int j;
-
- /* Follow continuations */
- for (j=2;j<16;j++)
- {
- cost[i][j] = cost[i-1][j-1];
- states[i][j] = j-1;
- }
-
- /* New frames */
- for(j=0;j<4;j++)
- {
- int k;
- float min_cost;
- float curr_cost;
- states[i][1<<j] = 1;
- min_cost = cost[i-1][1];
- for(k=1;k<4;k++)
- {
- float tmp = cost[i-1][(1<<(k+1))-1];
- if (tmp < min_cost)
- {
- states[i][1<<j] = (1<<(k+1))-1;
- min_cost = tmp;
- }
- }
- curr_cost = (frame_cost + rate*(1<<j))*(1+factor*transient_boost(E+i, E_1+i, j, N-i+1));
- cost[i][1<<j] = min_cost;
- /* If part of the frame is outside the analysis window, only count part of the cost */
- if (N-i < (1<<j))
- cost[i][1<<j] += curr_cost*(float)(N-i)/(1<<j);
- else
- cost[i][1<<j] += curr_cost;
- }
- }
-
- best_state=1;
- best_cost = cost[N-1][1];
- /* Find best end state (doesn't force a frame to end at N-1) */
- for (i=2;i<16;i++)
- {
- if (cost[N-1][i]<best_cost)
- {
- best_cost = cost[N-1][i];
- best_state = i;
- }
- }
-
- /* Follow transitions back */
- for (i=N-1;i>=0;i--)
- {
- /*printf("%d ", best_state);*/
- best_state = states[i][best_state];
- }
- /*printf("%d\n", best_state);*/
- return best_state;
-}
-
-static int optimize_framesize(const void *x, int len, int C, opus_int32 Fs,
- int bitrate, opus_val16 tonality, float *mem, int buffering,
- downmix_func downmix)
-{
- int N;
- int i;
- float e[MAX_DYNAMIC_FRAMESIZE+4];
- float e_1[MAX_DYNAMIC_FRAMESIZE+3];
- opus_val32 memx;
- int bestLM=0;
- int subframe;
- int pos;
- int offset;
- VARDECL(opus_val32, sub);
-
- subframe = Fs/400;
- ALLOC(sub, subframe, opus_val32);
- e[0]=mem[0];
- e_1[0]=1.f/(EPSILON+mem[0]);
- if (buffering)
- {
- /* Consider the CELT delay when not in restricted-lowdelay */
- /* We assume the buffering is between 2.5 and 5 ms */
- offset = 2*subframe - buffering;
- celt_assert(offset>=0 && offset <= subframe);
- len -= offset;
- e[1]=mem[1];
- e_1[1]=1.f/(EPSILON+mem[1]);
- e[2]=mem[2];
- e_1[2]=1.f/(EPSILON+mem[2]);
- pos = 3;
- } else {
- pos=1;
- offset=0;
- }
- N=IMIN(len/subframe, MAX_DYNAMIC_FRAMESIZE);
- /* Just silencing a warning, it's really initialized later */
- memx = 0;
- for (i=0;i<N;i++)
- {
- float tmp;
- opus_val32 tmpx;
- int j;
- tmp=EPSILON;
-
- downmix(x, sub, subframe, i*subframe+offset, 0, -2, C);
- if (i==0)
- memx = sub[0];
- for (j=0;j<subframe;j++)
- {
- tmpx = sub[j];
- tmp += (tmpx-memx)*(float)(tmpx-memx);
- memx = tmpx;
- }
- e[i+pos] = tmp;
- e_1[i+pos] = 1.f/tmp;
- }
- /* Hack to get 20 ms working with APPLICATION_AUDIO
- The real problem is that the corresponding memory needs to use 1.5 ms
- from this frame and 1 ms from the next frame */
- e[i+pos] = e[i+pos-1];
- if (buffering)
- N=IMIN(MAX_DYNAMIC_FRAMESIZE, N+2);
- bestLM = transient_viterbi(e, e_1, N, (int)((1.f+.5f*tonality)*(60*C+40)), bitrate/400);
- mem[0] = e[1<<bestLM];
- if (buffering)
- {
- mem[1] = e[(1<<bestLM)+1];
- mem[2] = e[(1<<bestLM)+2];
- }
- return bestLM;
-}
-
-#endif
-
-#ifndef DISABLE_FLOAT_API
#ifdef FIXED_POINT
#define PCM2VAL(x) FLOAT2INT16(x)
#else
#define PCM2VAL(x) SCALEIN(x)
#endif
-void downmix_float(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C)
+
+void downmix_float(const void *_x, opus_val32 *y, int subframe, int offset, int c1, int c2, int C)
{
const float *x;
- opus_val32 scale;
int j;
+
x = (const float *)_x;
for (j=0;j<subframe;j++)
- sub[j] = PCM2VAL(x[(j+offset)*C+c1]);
+ y[j] = PCM2VAL(x[(j+offset)*C+c1]);
if (c2>-1)
{
for (j=0;j<subframe;j++)
- sub[j] += PCM2VAL(x[(j+offset)*C+c2]);
+ y[j] += PCM2VAL(x[(j+offset)*C+c2]);
} else if (c2==-2)
{
int c;
for (c=1;c<C;c++)
{
for (j=0;j<subframe;j++)
- sub[j] += PCM2VAL(x[(j+offset)*C+c]);
+ y[j] += PCM2VAL(x[(j+offset)*C+c]);
}
}
-#ifdef FIXED_POINT
- scale = (1<<SIG_SHIFT);
-#else
- scale = 1.f;
-#endif
- if (C==-2)
- scale /= C;
- else
- scale /= 2;
- for (j=0;j<subframe;j++)
- sub[j] *= scale;
}
#endif
-void downmix_int(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C)
+void downmix_int(const void *_x, opus_val32 *y, int subframe, int offset, int c1, int c2, int C)
{
const opus_int16 *x;
- opus_val32 scale;
int j;
+
x = (const opus_int16 *)_x;
for (j=0;j<subframe;j++)
- sub[j] = x[(j+offset)*C+c1];
+ y[j] = x[(j+offset)*C+c1];
if (c2>-1)
{
for (j=0;j<subframe;j++)
- sub[j] += x[(j+offset)*C+c2];
+ y[j] += x[(j+offset)*C+c2];
} else if (c2==-2)
{
int c;
for (c=1;c<C;c++)
{
for (j=0;j<subframe;j++)
- sub[j] += x[(j+offset)*C+c];
+ y[j] += x[(j+offset)*C+c];
}
}
-#ifdef FIXED_POINT
- scale = (1<<SIG_SHIFT);
-#else
- scale = 1.f/32768;
-#endif
- if (C==-2)
- scale /= C;
- else
- scale /= 2;
- for (j=0;j<subframe;j++)
- sub[j] *= scale;
}
opus_int32 frame_size_select(opus_int32 frame_size, int variable_duration, opus_int32 Fs)
@@ -811,53 +615,24 @@ opus_int32 frame_size_select(opus_int32 frame_size, int variable_duration, opus_
return -1;
if (variable_duration == OPUS_FRAMESIZE_ARG)
new_size = frame_size;
- else if (variable_duration == OPUS_FRAMESIZE_VARIABLE)
- new_size = Fs/50;
- else if (variable_duration >= OPUS_FRAMESIZE_2_5_MS && variable_duration <= OPUS_FRAMESIZE_60_MS)
- new_size = IMIN(3*Fs/50, (Fs/400)<<(variable_duration-OPUS_FRAMESIZE_2_5_MS));
+ else if (variable_duration >= OPUS_FRAMESIZE_2_5_MS && variable_duration <= OPUS_FRAMESIZE_120_MS)
+ {
+ if (variable_duration <= OPUS_FRAMESIZE_40_MS)
+ new_size = (Fs/400)<<(variable_duration-OPUS_FRAMESIZE_2_5_MS);
+ else
+ new_size = (variable_duration-OPUS_FRAMESIZE_2_5_MS-2)*Fs/50;
+ }
else
return -1;
if (new_size>frame_size)
return -1;
- if (400*new_size!=Fs && 200*new_size!=Fs && 100*new_size!=Fs &&
- 50*new_size!=Fs && 25*new_size!=Fs && 50*new_size!=3*Fs)
+ if (400*new_size!=Fs && 200*new_size!=Fs && 100*new_size!=Fs &&
+ 50*new_size!=Fs && 25*new_size!=Fs && 50*new_size!=3*Fs &&
+ 50*new_size!=4*Fs && 50*new_size!=5*Fs && 50*new_size!=6*Fs)
return -1;
return new_size;
}
-opus_int32 compute_frame_size(const void *analysis_pcm, int frame_size,
- int variable_duration, int C, opus_int32 Fs, int bitrate_bps,
- int delay_compensation, downmix_func downmix
-#ifndef DISABLE_FLOAT_API
- , float *subframe_mem
-#endif
- )
-{
-#ifndef DISABLE_FLOAT_API
- if (variable_duration == OPUS_FRAMESIZE_VARIABLE && frame_size >= Fs/200)
- {
- int LM = 3;
- LM = optimize_framesize(analysis_pcm, frame_size, C, Fs, bitrate_bps,
- 0, subframe_mem, delay_compensation, downmix);
- while ((Fs/400<<LM)>frame_size)
- LM--;
- frame_size = (Fs/400<<LM);
- } else
-#else
- (void)analysis_pcm;
- (void)C;
- (void)bitrate_bps;
- (void)delay_compensation;
- (void)downmix;
-#endif
- {
- frame_size = frame_size_select(frame_size, variable_duration, Fs);
- }
- if (frame_size<0)
- return -1;
- return frame_size;
-}
-
opus_val16 compute_stereo_width(const opus_val16 *pcm, int frame_size, opus_int32 Fs, StereoWidthState *mem)
{
opus_val32 xx, xy, yy;
@@ -904,6 +679,12 @@ opus_val16 compute_stereo_width(const opus_val16 *pcm, int frame_size, opus_int3
xy += SHR32(pxy, 10);
yy += SHR32(pyy, 10);
}
+#ifndef FIXED_POINT
+ if (!(xx < 1e9f) || celt_isnan(xx) || !(yy < 1e9f) || celt_isnan(yy))
+ {
+ xy = xx = yy = 0;
+ }
+#endif
mem->XX += MULT16_32_Q15(short_alpha, xx-mem->XX);
mem->XY += MULT16_32_Q15(short_alpha, xy-mem->XY);
mem->YY += MULT16_32_Q15(short_alpha, yy-mem->YY);
@@ -934,6 +715,339 @@ opus_val16 compute_stereo_width(const opus_val16 *pcm, int frame_size, opus_int3
return EXTRACT16(MIN32(Q15ONE, MULT16_16(20, mem->max_follower)));
}
+static int decide_fec(int useInBandFEC, int PacketLoss_perc, int last_fec, int mode, int *bandwidth, opus_int32 rate)
+{
+ int orig_bandwidth;
+ if (!useInBandFEC || PacketLoss_perc == 0 || mode == MODE_CELT_ONLY)
+ return 0;
+ orig_bandwidth = *bandwidth;
+ for (;;)
+ {
+ opus_int32 hysteresis;
+ opus_int32 LBRR_rate_thres_bps;
+ /* Compute threshold for using FEC at the current bandwidth setting */
+ LBRR_rate_thres_bps = fec_thresholds[2*(*bandwidth - OPUS_BANDWIDTH_NARROWBAND)];
+ hysteresis = fec_thresholds[2*(*bandwidth - OPUS_BANDWIDTH_NARROWBAND) + 1];
+ if (last_fec == 1) LBRR_rate_thres_bps -= hysteresis;
+ if (last_fec == 0) LBRR_rate_thres_bps += hysteresis;
+ LBRR_rate_thres_bps = silk_SMULWB( silk_MUL( LBRR_rate_thres_bps,
+ 125 - silk_min( PacketLoss_perc, 25 ) ), SILK_FIX_CONST( 0.01, 16 ) );
+ /* If loss <= 5%, we look at whether we have enough rate to enable FEC.
+ If loss > 5%, we decrease the bandwidth until we can enable FEC. */
+ if (rate > LBRR_rate_thres_bps)
+ return 1;
+ else if (PacketLoss_perc <= 5)
+ return 0;
+ else if (*bandwidth > OPUS_BANDWIDTH_NARROWBAND)
+ (*bandwidth)--;
+ else
+ break;
+ }
+ /* Couldn't find any bandwidth to enable FEC, keep original bandwidth. */
+ *bandwidth = orig_bandwidth;
+ return 0;
+}
+
+static int compute_silk_rate_for_hybrid(int rate, int bandwidth, int frame20ms, int vbr, int fec, int channels) {
+ int entry;
+ int i;
+ int N;
+ int silk_rate;
+ static int rate_table[][5] = {
+ /* |total| |-------- SILK------------|
+ |-- No FEC -| |--- FEC ---|
+ 10ms 20ms 10ms 20ms */
+ { 0, 0, 0, 0, 0},
+ {12000, 10000, 10000, 11000, 11000},
+ {16000, 13500, 13500, 15000, 15000},
+ {20000, 16000, 16000, 18000, 18000},
+ {24000, 18000, 18000, 21000, 21000},
+ {32000, 22000, 22000, 28000, 28000},
+ {64000, 38000, 38000, 50000, 50000}
+ };
+ /* Do the allocation per-channel. */
+ rate /= channels;
+ entry = 1 + frame20ms + 2*fec;
+ N = sizeof(rate_table)/sizeof(rate_table[0]);
+ for (i=1;i<N;i++)
+ {
+ if (rate_table[i][0] > rate) break;
+ }
+ if (i == N)
+ {
+ silk_rate = rate_table[i-1][entry];
+ /* For now, just give 50% of the extra bits to SILK. */
+ silk_rate += (rate-rate_table[i-1][0])/2;
+ } else {
+ opus_int32 lo, hi, x0, x1;
+ lo = rate_table[i-1][entry];
+ hi = rate_table[i][entry];
+ x0 = rate_table[i-1][0];
+ x1 = rate_table[i][0];
+ silk_rate = (lo*(x1-rate) + hi*(rate-x0))/(x1-x0);
+ }
+ if (!vbr)
+ {
+ /* Tiny boost to SILK for CBR. We should probably tune this better. */
+ silk_rate += 100;
+ }
+ if (bandwidth==OPUS_BANDWIDTH_SUPERWIDEBAND)
+ silk_rate += 300;
+ silk_rate *= channels;
+ /* Small adjustment for stereo (calibrated for 32 kb/s, haven't tried other bitrates). */
+ if (channels == 2 && rate >= 12000)
+ silk_rate -= 1000;
+ return silk_rate;
+}
+
+/* Returns the equivalent bitrate corresponding to 20 ms frames,
+ complexity 10 VBR operation. */
+static opus_int32 compute_equiv_rate(opus_int32 bitrate, int channels,
+ int frame_rate, int vbr, int mode, int complexity, int loss)
+{
+ opus_int32 equiv;
+ equiv = bitrate;
+ /* Take into account overhead from smaller frames. */
+ if (frame_rate > 50)
+ equiv -= (40*channels+20)*(frame_rate - 50);
+ /* CBR is about a 8% penalty for both SILK and CELT. */
+ if (!vbr)
+ equiv -= equiv/12;
+ /* Complexity makes about 10% difference (from 0 to 10) in general. */
+ equiv = equiv * (90+complexity)/100;
+ if (mode == MODE_SILK_ONLY || mode == MODE_HYBRID)
+ {
+ /* SILK complexity 0-1 uses the non-delayed-decision NSQ, which
+ costs about 20%. */
+ if (complexity<2)
+ equiv = equiv*4/5;
+ equiv -= equiv*loss/(6*loss + 10);
+ } else if (mode == MODE_CELT_ONLY) {
+ /* CELT complexity 0-4 doesn't have the pitch filter, which costs
+ about 10%. */
+ if (complexity<5)
+ equiv = equiv*9/10;
+ } else {
+ /* Mode not known yet */
+ /* Half the SILK loss*/
+ equiv -= equiv*loss/(12*loss + 20);
+ }
+ return equiv;
+}
+
+#ifndef DISABLE_FLOAT_API
+
+int is_digital_silence(const opus_val16* pcm, int frame_size, int channels, int lsb_depth)
+{
+ int silence = 0;
+ opus_val32 sample_max = 0;
+#ifdef MLP_TRAINING
+ return 0;
+#endif
+ sample_max = celt_maxabs16(pcm, frame_size*channels);
+
+#ifdef FIXED_POINT
+ silence = (sample_max == 0);
+ (void)lsb_depth;
+#else
+ silence = (sample_max <= (opus_val16) 1 / (1 << lsb_depth));
+#endif
+
+ return silence;
+}
+
+#ifdef FIXED_POINT
+static opus_val32 compute_frame_energy(const opus_val16 *pcm, int frame_size, int channels, int arch)
+{
+ int i;
+ opus_val32 sample_max;
+ int max_shift;
+ int shift;
+ opus_val32 energy = 0;
+ int len = frame_size*channels;
+ (void)arch;
+ /* Max amplitude in the signal */
+ sample_max = celt_maxabs16(pcm, len);
+
+ /* Compute the right shift required in the MAC to avoid an overflow */
+ max_shift = celt_ilog2(len);
+ shift = IMAX(0, (celt_ilog2(sample_max) << 1) + max_shift - 28);
+
+ /* Compute the energy */
+ for (i=0; i<len; i++)
+ energy += SHR32(MULT16_16(pcm[i], pcm[i]), shift);
+
+ /* Normalize energy by the frame size and left-shift back to the original position */
+ energy /= len;
+ energy = SHL32(energy, shift);
+
+ return energy;
+}
+#else
+static opus_val32 compute_frame_energy(const opus_val16 *pcm, int frame_size, int channels, int arch)
+{
+ int len = frame_size*channels;
+ return celt_inner_prod(pcm, pcm, len, arch)/len;
+}
+#endif
+
+/* Decides if DTX should be turned on (=1) or off (=0) */
+static int decide_dtx_mode(opus_int activity, /* indicates if this frame contains speech/music */
+ int *nb_no_activity_ms_Q1, /* number of consecutive milliseconds with no activity, in Q1 */
+ int frame_size_ms_Q1 /* number of miliseconds in this update, in Q1 */
+ )
+
+{
+ if (!activity)
+ {
+ /* The number of consecutive DTX frames should be within the allowed bounds.
+ Note that the allowed bound is defined in the SILK headers and assumes 20 ms
+ frames. As this function can be called with any frame length, a conversion to
+ milliseconds is done before the comparisons. */
+ (*nb_no_activity_ms_Q1) += frame_size_ms_Q1;
+ if (*nb_no_activity_ms_Q1 > NB_SPEECH_FRAMES_BEFORE_DTX*20*2)
+ {
+ if (*nb_no_activity_ms_Q1 <= (NB_SPEECH_FRAMES_BEFORE_DTX + MAX_CONSECUTIVE_DTX)*20*2)
+ /* Valid frame for DTX! */
+ return 1;
+ else
+ (*nb_no_activity_ms_Q1) = NB_SPEECH_FRAMES_BEFORE_DTX*20*2;
+ }
+ } else
+ (*nb_no_activity_ms_Q1) = 0;
+
+ return 0;
+}
+
+#endif
+
+static opus_int32 encode_multiframe_packet(OpusEncoder *st,
+ const opus_val16 *pcm,
+ int nb_frames,
+ int frame_size,
+ unsigned char *data,
+ opus_int32 out_data_bytes,
+ int to_celt,
+ int lsb_depth,
+ int float_api)
+{
+ int i;
+ int ret = 0;
+ VARDECL(unsigned char, tmp_data);
+ int bak_mode, bak_bandwidth, bak_channels, bak_to_mono;
+ VARDECL(OpusRepacketizer, rp);
+ int max_header_bytes;
+ opus_int32 bytes_per_frame;
+ opus_int32 cbr_bytes;
+ opus_int32 repacketize_len;
+ int tmp_len;
+ ALLOC_STACK;
+
+ /* Worst cases:
+ * 2 frames: Code 2 with different compressed sizes
+ * >2 frames: Code 3 VBR */
+ max_header_bytes = nb_frames == 2 ? 3 : (2+(nb_frames-1)*2);
+
+ if (st->use_vbr || st->user_bitrate_bps==OPUS_BITRATE_MAX)
+ repacketize_len = out_data_bytes;
+ else {
+ cbr_bytes = 3*st->bitrate_bps/(3*8*st->Fs/(frame_size*nb_frames));
+ repacketize_len = IMIN(cbr_bytes, out_data_bytes);
+ }
+ bytes_per_frame = IMIN(1276, 1+(repacketize_len-max_header_bytes)/nb_frames);
+
+ ALLOC(tmp_data, nb_frames*bytes_per_frame, unsigned char);
+ ALLOC(rp, 1, OpusRepacketizer);
+ opus_repacketizer_init(rp);
+
+ bak_mode = st->user_forced_mode;
+ bak_bandwidth = st->user_bandwidth;
+ bak_channels = st->force_channels;
+
+ st->user_forced_mode = st->mode;
+ st->user_bandwidth = st->bandwidth;
+ st->force_channels = st->stream_channels;
+
+ bak_to_mono = st->silk_mode.toMono;
+ if (bak_to_mono)
+ st->force_channels = 1;
+ else
+ st->prev_channels = st->stream_channels;
+
+ for (i=0;i<nb_frames;i++)
+ {
+ st->silk_mode.toMono = 0;
+ st->nonfinal_frame = i<(nb_frames-1);
+
+ /* When switching from SILK/Hybrid to CELT, only ask for a switch at the last frame */
+ if (to_celt && i==nb_frames-1)
+ st->user_forced_mode = MODE_CELT_ONLY;
+
+ tmp_len = opus_encode_native(st, pcm+i*(st->channels*frame_size), frame_size,
+ tmp_data+i*bytes_per_frame, bytes_per_frame, lsb_depth, NULL, 0, 0, 0, 0,
+ NULL, float_api);
+
+ if (tmp_len<0)
+ {
+ RESTORE_STACK;
+ return OPUS_INTERNAL_ERROR;
+ }
+
+ ret = opus_repacketizer_cat(rp, tmp_data+i*bytes_per_frame, tmp_len);
+
+ if (ret<0)
+ {
+ RESTORE_STACK;
+ return OPUS_INTERNAL_ERROR;
+ }
+ }
+
+ ret = opus_repacketizer_out_range_impl(rp, 0, nb_frames, data, repacketize_len, 0, !st->use_vbr);
+
+ if (ret<0)
+ {
+ RESTORE_STACK;
+ return OPUS_INTERNAL_ERROR;
+ }
+
+ /* Discard configs that were forced locally for the purpose of repacketization */
+ st->user_forced_mode = bak_mode;
+ st->user_bandwidth = bak_bandwidth;
+ st->force_channels = bak_channels;
+ st->silk_mode.toMono = bak_to_mono;
+
+ RESTORE_STACK;
+ return ret;
+}
+
+static int compute_redundancy_bytes(opus_int32 max_data_bytes, opus_int32 bitrate_bps, int frame_rate, int channels)
+{
+ int redundancy_bytes_cap;
+ int redundancy_bytes;
+ opus_int32 redundancy_rate;
+ int base_bits;
+ opus_int32 available_bits;
+ base_bits = (40*channels+20);
+
+ /* Equivalent rate for 5 ms frames. */
+ redundancy_rate = bitrate_bps + base_bits*(200 - frame_rate);
+ /* For VBR, further increase the bitrate if we can afford it. It's pretty short
+ and we'll avoid artefacts. */
+ redundancy_rate = 3*redundancy_rate/2;
+ redundancy_bytes = redundancy_rate/1600;
+
+ /* Compute the max rate we can use given CBR or VBR with cap. */
+ available_bits = max_data_bytes*8 - 2*base_bits;
+ redundancy_bytes_cap = (available_bits*240/(240+48000/frame_rate) + base_bits)/8;
+ redundancy_bytes = IMIN(redundancy_bytes, redundancy_bytes_cap);
+ /* It we can't get enough bits for redundancy to be worth it, rely on the decoder PLC. */
+ if (redundancy_bytes > 4 + 8*channels)
+ redundancy_bytes = IMIN(257, redundancy_bytes);
+ else
+ redundancy_bytes = 0;
+ return redundancy_bytes;
+}
+
opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size,
unsigned char *data, opus_int32 out_data_bytes, int lsb_depth,
const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2,
@@ -971,7 +1085,10 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
AnalysisInfo analysis_info;
int analysis_read_pos_bak=-1;
int analysis_read_subframe_bak=-1;
+ int is_silence = 0;
#endif
+ opus_int activity = VAD_NO_DECISION;
+
VARDECL(opus_val16, tmp_prefill);
ALLOC_STACK;
@@ -979,15 +1096,19 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
max_data_bytes = IMIN(1276, out_data_bytes);
st->rangeFinal = 0;
- if ((!st->variable_duration && 400*frame_size != st->Fs && 200*frame_size != st->Fs && 100*frame_size != st->Fs &&
- 50*frame_size != st->Fs && 25*frame_size != st->Fs && 50*frame_size != 3*st->Fs)
- || (400*frame_size < st->Fs)
- || max_data_bytes<=0
- )
+ if (frame_size <= 0 || max_data_bytes <= 0)
{
RESTORE_STACK;
return OPUS_BAD_ARG;
}
+
+ /* Cannot encode 100 ms in 1 byte */
+ if (max_data_bytes==1 && st->Fs==(frame_size*10))
+ {
+ RESTORE_STACK;
+ return OPUS_BUFFER_TOO_SMALL;
+ }
+
silk_enc = (char*)st+st->silk_enc_offset;
celt_enc = (CELTEncoder*)((char*)st+st->celt_enc_offset);
if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
@@ -1001,31 +1122,69 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
#ifndef DISABLE_FLOAT_API
analysis_info.valid = 0;
#ifdef FIXED_POINT
- if (st->silk_mode.complexity >= 10 && st->Fs==48000)
+ if (st->silk_mode.complexity >= 10 && st->Fs>=16000)
#else
- if (st->silk_mode.complexity >= 7 && st->Fs==48000)
+ if (st->silk_mode.complexity >= 7 && st->Fs>=16000)
#endif
{
+ is_silence = is_digital_silence(pcm, frame_size, st->channels, lsb_depth);
analysis_read_pos_bak = st->analysis.read_pos;
analysis_read_subframe_bak = st->analysis.read_subframe;
run_analysis(&st->analysis, celt_mode, analysis_pcm, analysis_size, frame_size,
c1, c2, analysis_channels, st->Fs,
lsb_depth, downmix, &analysis_info);
+
+ /* Track the peak signal energy */
+ if (!is_silence && analysis_info.activity_probability > DTX_ACTIVITY_THRESHOLD)
+ st->peak_signal_energy = MAX32(MULT16_32_Q15(QCONST16(0.999f, 15), st->peak_signal_energy),
+ compute_frame_energy(pcm, frame_size, st->channels, st->arch));
+ } else if (st->analysis.initialized) {
+ tonality_analysis_reset(&st->analysis);
}
#else
(void)analysis_pcm;
(void)analysis_size;
+ (void)c1;
+ (void)c2;
+ (void)analysis_channels;
+ (void)downmix;
#endif
- st->voice_ratio = -1;
-
#ifndef DISABLE_FLOAT_API
+ /* Reset voice_ratio if this frame is not silent or if analysis is disabled.
+ * Otherwise, preserve voice_ratio from the last non-silent frame */
+ if (!is_silence)
+ st->voice_ratio = -1;
+
+ if (is_silence)
+ {
+ activity = !is_silence;
+ } else if (analysis_info.valid)
+ {
+ activity = analysis_info.activity_probability >= DTX_ACTIVITY_THRESHOLD;
+ if (!activity)
+ {
+ /* Mark as active if this noise frame is sufficiently loud */
+ opus_val32 noise_energy = compute_frame_energy(pcm, frame_size, st->channels, st->arch);
+ activity = st->peak_signal_energy < (PSEUDO_SNR_THRESHOLD * noise_energy);
+ }
+ }
+
st->detected_bandwidth = 0;
if (analysis_info.valid)
{
int analysis_bandwidth;
if (st->signal_type == OPUS_AUTO)
- st->voice_ratio = (int)floor(.5+100*(1-analysis_info.music_prob));
+ {
+ float prob;
+ if (st->prev_mode == 0)
+ prob = analysis_info.music_prob;
+ else if (st->prev_mode == MODE_CELT_ONLY)
+ prob = analysis_info.music_prob_max;
+ else
+ prob = analysis_info.music_prob_min;
+ st->voice_ratio = (int)floor(.5+100*(1-prob));
+ }
analysis_bandwidth = analysis_info.bandwidth;
if (analysis_bandwidth<=12)
@@ -1039,6 +1198,8 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
else
st->detected_bandwidth = OPUS_BANDWIDTH_FULLBAND;
}
+#else
+ st->voice_ratio = -1;
#endif
if (st->channels==2 && st->force_channels!=1)
@@ -1052,12 +1213,13 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (!st->use_vbr)
{
int cbrBytes;
- /* Multiply by 3 to make sure the division is exact. */
- int frame_rate3 = 3*st->Fs/frame_size;
+ /* Multiply by 12 to make sure the division is exact. */
+ int frame_rate12 = 12*st->Fs/frame_size;
/* We need to make sure that "int" values always fit in 16 bits. */
- cbrBytes = IMIN( (3*st->bitrate_bps/8 + frame_rate3/2)/frame_rate3, max_data_bytes);
- st->bitrate_bps = cbrBytes*(opus_int32)frame_rate3*8/3;
- max_data_bytes = cbrBytes;
+ cbrBytes = IMIN( (12*st->bitrate_bps/8 + frame_rate12/2)/frame_rate12, max_data_bytes);
+ st->bitrate_bps = cbrBytes*(opus_int32)frame_rate12*8/12;
+ /* Make sure we provide at least one byte to avoid failing. */
+ max_data_bytes = IMAX(1, cbrBytes);
}
if (max_data_bytes<3 || st->bitrate_bps < 3*frame_rate*8
|| (frame_rate<50 && (max_data_bytes*frame_rate<300 || st->bitrate_bps < 2400)))
@@ -1065,25 +1227,63 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
/*If the space is too low to do something useful, emit 'PLC' frames.*/
int tocmode = st->mode;
int bw = st->bandwidth == 0 ? OPUS_BANDWIDTH_NARROWBAND : st->bandwidth;
+ int packet_code = 0;
+ int num_multiframes = 0;
+
if (tocmode==0)
tocmode = MODE_SILK_ONLY;
if (frame_rate>100)
tocmode = MODE_CELT_ONLY;
- if (frame_rate < 50)
- tocmode = MODE_SILK_ONLY;
+ /* 40 ms -> 2 x 20 ms if in CELT_ONLY or HYBRID mode */
+ if (frame_rate==25 && tocmode!=MODE_SILK_ONLY)
+ {
+ frame_rate = 50;
+ packet_code = 1;
+ }
+
+ /* >= 60 ms frames */
+ if (frame_rate<=16)
+ {
+ /* 1 x 60 ms, 2 x 40 ms, 2 x 60 ms */
+ if (out_data_bytes==1 || (tocmode==MODE_SILK_ONLY && frame_rate!=10))
+ {
+ tocmode = MODE_SILK_ONLY;
+
+ packet_code = frame_rate <= 12;
+ frame_rate = frame_rate == 12 ? 25 : 16;
+ }
+ else
+ {
+ num_multiframes = 50/frame_rate;
+ frame_rate = 50;
+ packet_code = 3;
+ }
+ }
+
if(tocmode==MODE_SILK_ONLY&&bw>OPUS_BANDWIDTH_WIDEBAND)
bw=OPUS_BANDWIDTH_WIDEBAND;
else if (tocmode==MODE_CELT_ONLY&&bw==OPUS_BANDWIDTH_MEDIUMBAND)
bw=OPUS_BANDWIDTH_NARROWBAND;
else if (tocmode==MODE_HYBRID&&bw<=OPUS_BANDWIDTH_SUPERWIDEBAND)
bw=OPUS_BANDWIDTH_SUPERWIDEBAND;
+
data[0] = gen_toc(tocmode, frame_rate, bw, st->stream_channels);
- ret = 1;
+ data[0] |= packet_code;
+
+ ret = packet_code <= 1 ? 1 : 2;
+
+ max_data_bytes = IMAX(max_data_bytes, ret);
+
+ if (packet_code==3)
+ data[1] = num_multiframes;
+
if (!st->use_vbr)
{
ret = opus_packet_pad(data, ret, max_data_bytes);
if (ret == OPUS_OK)
ret = max_data_bytes;
+ else
+ ret = OPUS_INTERNAL_ERROR;
}
RESTORE_STACK;
return ret;
@@ -1091,7 +1291,8 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
max_rate = frame_rate*max_data_bytes*8;
/* Equivalent 20-ms rate for mode/channel/bandwidth decisions */
- equiv_rate = st->bitrate_bps - (40*st->channels+20)*(st->Fs/frame_size - 50);
+ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->channels, st->Fs/frame_size,
+ st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
if (st->signal_type == OPUS_SIGNAL_VOICE)
voice_est = 127;
@@ -1132,7 +1333,17 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
}
#endif
}
- equiv_rate = st->bitrate_bps - (40*st->stream_channels+20)*(st->Fs/frame_size - 50);
+ /* Update equivalent rate for channels decision. */
+ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size,
+ st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
+
+ /* Allow SILK DTX if DTX is enabled but the generalized DTX cannot be used,
+ e.g. because of the complexity setting or sample rate. */
+#ifndef DISABLE_FLOAT_API
+ st->silk_mode.useDTX = st->use_dtx && !(analysis_info.valid || is_silence);
+#else
+ st->silk_mode.useDTX = st->use_dtx;
+#endif
/* Mode selection depending on application and signal type */
if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
@@ -1181,10 +1392,15 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
/* When FEC is enabled and there's enough packet loss, use SILK */
if (st->silk_mode.useInBandFEC && st->silk_mode.packetLossPercentage > (128-voice_est)>>4)
st->mode = MODE_SILK_ONLY;
- /* When encoding voice and DTX is enabled, set the encoder to SILK mode (at least for now) */
+ /* When encoding voice and DTX is enabled but the generalized DTX cannot be used,
+ use SILK in order to make use of its DTX. */
if (st->silk_mode.useDTX && voice_est > 100)
st->mode = MODE_SILK_ONLY;
#endif
+
+ /* If max_data_bytes represents less than 6 kb/s, switch to CELT-only mode */
+ if (max_data_bytes < (frame_rate > 50 ? 9000 : 6000)*frame_size / (st->Fs * 8))
+ st->mode = MODE_CELT_ONLY;
} else {
st->mode = st->user_forced_mode;
}
@@ -1194,19 +1410,6 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->mode = MODE_CELT_ONLY;
if (st->lfe)
st->mode = MODE_CELT_ONLY;
- /* If max_data_bytes represents less than 8 kb/s, switch to CELT-only mode */
- if (max_data_bytes < (frame_rate > 50 ? 12000 : 8000)*frame_size / (st->Fs * 8))
- st->mode = MODE_CELT_ONLY;
-
- if (st->stream_channels == 1 && st->prev_channels ==2 && st->silk_mode.toMono==0
- && st->mode != MODE_CELT_ONLY && st->prev_mode != MODE_CELT_ONLY)
- {
- /* Delay stereo->mono transition by two frames so that SILK can do a smooth downmix */
- st->silk_mode.toMono = 1;
- st->stream_channels = 2;
- } else {
- st->silk_mode.toMono = 0;
- }
if (st->prev_mode > 0 &&
((st->mode != MODE_CELT_ONLY && st->prev_mode == MODE_CELT_ONLY) ||
@@ -1226,24 +1429,23 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
}
}
}
- /* For the first frame at a new SILK bandwidth */
- if (st->silk_bw_switch)
- {
- redundancy = 1;
- celt_to_silk = 1;
- st->silk_bw_switch = 0;
- prefill=1;
- }
- if (redundancy)
+ /* When encoding multiframes, we can ask for a switch to CELT only in the last frame. This switch
+ * is processed above as the requested mode shouldn't interrupt stereo->mono transition. */
+ if (st->stream_channels == 1 && st->prev_channels ==2 && st->silk_mode.toMono==0
+ && st->mode != MODE_CELT_ONLY && st->prev_mode != MODE_CELT_ONLY)
{
- /* Fair share of the max size allowed */
- redundancy_bytes = IMIN(257, max_data_bytes*(opus_int32)(st->Fs/200)/(frame_size+st->Fs/200));
- /* For VBR, target the actual bitrate (subject to the limit above) */
- if (st->use_vbr)
- redundancy_bytes = IMIN(redundancy_bytes, st->bitrate_bps/1600);
+ /* Delay stereo->mono transition by two frames so that SILK can do a smooth downmix */
+ st->silk_mode.toMono = 1;
+ st->stream_channels = 2;
+ } else {
+ st->silk_mode.toMono = 0;
}
+ /* Update equivalent rate with mode decision. */
+ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size,
+ st->use_vbr, st->mode, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
+
if (st->mode != MODE_CELT_ONLY && st->prev_mode == MODE_CELT_ONLY)
{
silk_EncControlStruct dummy;
@@ -1257,17 +1459,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
const opus_int32 *voice_bandwidth_thresholds, *music_bandwidth_thresholds;
opus_int32 bandwidth_thresholds[8];
int bandwidth = OPUS_BANDWIDTH_FULLBAND;
- opus_int32 equiv_rate2;
- equiv_rate2 = equiv_rate;
- if (st->mode != MODE_CELT_ONLY)
- {
- /* Adjust the threshold +/- 10% depending on complexity */
- equiv_rate2 = equiv_rate2 * (45+st->silk_mode.complexity)/50;
- /* CBR is less efficient by ~1 kb/s */
- if (!st->use_vbr)
- equiv_rate2 -= 1000;
- }
if (st->channels==2 && st->force_channels!=1)
{
voice_bandwidth_thresholds = stereo_voice_bandwidth_thresholds;
@@ -1288,15 +1480,19 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
hysteresis = bandwidth_thresholds[2*(bandwidth-OPUS_BANDWIDTH_MEDIUMBAND)+1];
if (!st->first)
{
- if (st->bandwidth >= bandwidth)
+ if (st->auto_bandwidth >= bandwidth)
threshold -= hysteresis;
else
threshold += hysteresis;
}
- if (equiv_rate2 >= threshold)
+ if (equiv_rate >= threshold)
break;
} while (--bandwidth>OPUS_BANDWIDTH_NARROWBAND);
- st->bandwidth = bandwidth;
+ /* We don't use mediumband anymore, except when explicitly requested or during
+ mode transitions. */
+ if (bandwidth == OPUS_BANDWIDTH_MEDIUMBAND)
+ bandwidth = OPUS_BANDWIDTH_WIDEBAND;
+ st->bandwidth = st->auto_bandwidth = bandwidth;
/* Prevents any transition to SWB/FB until the SILK layer has fully
switched to WB mode and turned the variable LP filter off */
if (!st->first && st->mode != MODE_CELT_ONLY && !st->silk_mode.inWBmodeWithoutVariableLP && st->bandwidth > OPUS_BANDWIDTH_WIDEBAND)
@@ -1349,6 +1545,8 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->bandwidth = IMIN(st->bandwidth, st->detected_bandwidth);
}
#endif
+ st->silk_mode.LBRR_coded = decide_fec(st->silk_mode.useInBandFEC, st->silk_mode.packetLossPercentage,
+ st->silk_mode.LBRR_coded, st->mode, &st->bandwidth, equiv_rate);
celt_encoder_ctl(celt_enc, OPUS_SET_LSB_DEPTH(lsb_depth));
/* CELT mode doesn't support mediumband, use wideband instead */
@@ -1357,15 +1555,34 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (st->lfe)
st->bandwidth = OPUS_BANDWIDTH_NARROWBAND;
- /* Can't support higher than wideband for >20 ms frames */
- if (frame_size > st->Fs/50 && (st->mode == MODE_CELT_ONLY || st->bandwidth > OPUS_BANDWIDTH_WIDEBAND))
+ curr_bandwidth = st->bandwidth;
+
+ /* Chooses the appropriate mode for speech
+ *NEVER* switch to/from CELT-only mode here as this will invalidate some assumptions */
+ if (st->mode == MODE_SILK_ONLY && curr_bandwidth > OPUS_BANDWIDTH_WIDEBAND)
+ st->mode = MODE_HYBRID;
+ if (st->mode == MODE_HYBRID && curr_bandwidth <= OPUS_BANDWIDTH_WIDEBAND)
+ st->mode = MODE_SILK_ONLY;
+
+ /* Can't support higher than >60 ms frames, and >20 ms when in Hybrid or CELT-only modes */
+ if ((frame_size > st->Fs/50 && (st->mode != MODE_SILK_ONLY)) || frame_size > 3*st->Fs/50)
{
- VARDECL(unsigned char, tmp_data);
+ int enc_frame_size;
int nb_frames;
- int bak_mode, bak_bandwidth, bak_channels, bak_to_mono;
- VARDECL(OpusRepacketizer, rp);
- opus_int32 bytes_per_frame;
- opus_int32 repacketize_len;
+
+ if (st->mode == MODE_SILK_ONLY)
+ {
+ if (frame_size == 2*st->Fs/25) /* 80 ms -> 2x 40 ms */
+ enc_frame_size = st->Fs/25;
+ else if (frame_size == 3*st->Fs/25) /* 120 ms -> 2x 60 ms */
+ enc_frame_size = 3*st->Fs/50;
+ else /* 100 ms -> 5x 20 ms */
+ enc_frame_size = st->Fs/50;
+ }
+ else
+ enc_frame_size = st->Fs/50;
+
+ nb_frames = frame_size/enc_frame_size;
#ifndef DISABLE_FLOAT_API
if (analysis_read_pos_bak!= -1)
@@ -1375,74 +1592,34 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
}
#endif
- nb_frames = frame_size > st->Fs/25 ? 3 : 2;
- bytes_per_frame = IMIN(1276,(out_data_bytes-3)/nb_frames);
-
- ALLOC(tmp_data, nb_frames*bytes_per_frame, unsigned char);
+ ret = encode_multiframe_packet(st, pcm, nb_frames, enc_frame_size, data,
+ out_data_bytes, to_celt, lsb_depth, float_api);
- ALLOC(rp, 1, OpusRepacketizer);
- opus_repacketizer_init(rp);
-
- bak_mode = st->user_forced_mode;
- bak_bandwidth = st->user_bandwidth;
- bak_channels = st->force_channels;
-
- st->user_forced_mode = st->mode;
- st->user_bandwidth = st->bandwidth;
- st->force_channels = st->stream_channels;
- bak_to_mono = st->silk_mode.toMono;
-
- if (bak_to_mono)
- st->force_channels = 1;
- else
- st->prev_channels = st->stream_channels;
- for (i=0;i<nb_frames;i++)
- {
- int tmp_len;
- st->silk_mode.toMono = 0;
- /* When switching from SILK/Hybrid to CELT, only ask for a switch at the last frame */
- if (to_celt && i==nb_frames-1)
- st->user_forced_mode = MODE_CELT_ONLY;
- tmp_len = opus_encode_native(st, pcm+i*(st->channels*st->Fs/50), st->Fs/50,
- tmp_data+i*bytes_per_frame, bytes_per_frame, lsb_depth,
- NULL, 0, c1, c2, analysis_channels, downmix, float_api);
- if (tmp_len<0)
- {
- RESTORE_STACK;
- return OPUS_INTERNAL_ERROR;
- }
- ret = opus_repacketizer_cat(rp, tmp_data+i*bytes_per_frame, tmp_len);
- if (ret<0)
- {
- RESTORE_STACK;
- return OPUS_INTERNAL_ERROR;
- }
- }
- if (st->use_vbr)
- repacketize_len = out_data_bytes;
- else
- repacketize_len = IMIN(3*st->bitrate_bps/(3*8*50/nb_frames), out_data_bytes);
- ret = opus_repacketizer_out_range_impl(rp, 0, nb_frames, data, repacketize_len, 0, !st->use_vbr);
- if (ret<0)
- {
- RESTORE_STACK;
- return OPUS_INTERNAL_ERROR;
- }
- st->user_forced_mode = bak_mode;
- st->user_bandwidth = bak_bandwidth;
- st->force_channels = bak_channels;
- st->silk_mode.toMono = bak_to_mono;
RESTORE_STACK;
return ret;
}
- curr_bandwidth = st->bandwidth;
- /* Chooses the appropriate mode for speech
- *NEVER* switch to/from CELT-only mode here as this will invalidate some assumptions */
- if (st->mode == MODE_SILK_ONLY && curr_bandwidth > OPUS_BANDWIDTH_WIDEBAND)
- st->mode = MODE_HYBRID;
- if (st->mode == MODE_HYBRID && curr_bandwidth <= OPUS_BANDWIDTH_WIDEBAND)
- st->mode = MODE_SILK_ONLY;
+ /* For the first frame at a new SILK bandwidth */
+ if (st->silk_bw_switch)
+ {
+ redundancy = 1;
+ celt_to_silk = 1;
+ st->silk_bw_switch = 0;
+ /* Do a prefill without reseting the sampling rate control. */
+ prefill=2;
+ }
+
+ /* If we decided to go with CELT, make sure redundancy is off, no matter what
+ we decided earlier. */
+ if (st->mode == MODE_CELT_ONLY)
+ redundancy = 0;
+
+ if (redundancy)
+ {
+ redundancy_bytes = compute_redundancy_bytes(max_data_bytes, st->bitrate_bps, frame_rate, st->stream_channels);
+ if (redundancy_bytes == 0)
+ redundancy = 0;
+ }
/* printf("%d %d %d %d\n", st->bitrate_bps, st->stream_channels, st->mode, curr_bandwidth); */
bytes_target = IMIN(max_data_bytes-redundancy_bytes, st->bitrate_bps * frame_size / (st->Fs * 8)) - 1;
@@ -1467,7 +1644,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (st->application == OPUS_APPLICATION_VOIP)
{
- hp_cutoff(pcm, cutoff_Hz, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs);
+ hp_cutoff(pcm, cutoff_Hz, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs, st->arch);
} else {
dc_reject(pcm, 3, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs);
}
@@ -1502,27 +1679,15 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
/* Distribute bits between SILK and CELT */
total_bitRate = 8 * bytes_target * frame_rate;
if( st->mode == MODE_HYBRID ) {
- int HB_gain_ref;
/* Base rate for SILK */
- st->silk_mode.bitRate = st->stream_channels * ( 5000 + 1000 * ( st->Fs == 100 * frame_size ) );
- if( curr_bandwidth == OPUS_BANDWIDTH_SUPERWIDEBAND ) {
- /* SILK gets 2/3 of the remaining bits */
- st->silk_mode.bitRate += ( total_bitRate - st->silk_mode.bitRate ) * 2 / 3;
- } else { /* FULLBAND */
- /* SILK gets 3/5 of the remaining bits */
- st->silk_mode.bitRate += ( total_bitRate - st->silk_mode.bitRate ) * 3 / 5;
- }
- /* Don't let SILK use more than 80% */
- if( st->silk_mode.bitRate > total_bitRate * 4/5 ) {
- st->silk_mode.bitRate = total_bitRate * 4/5;
- }
+ st->silk_mode.bitRate = compute_silk_rate_for_hybrid(total_bitRate,
+ curr_bandwidth, st->Fs == 50 * frame_size, st->use_vbr, st->silk_mode.LBRR_coded,
+ st->stream_channels);
if (!st->energy_masking)
{
/* Increasingly attenuate high band when it gets allocated fewer bits */
celt_rate = total_bitRate - st->silk_mode.bitRate;
- HB_gain_ref = (curr_bandwidth == OPUS_BANDWIDTH_SUPERWIDEBAND) ? 3000 : 3600;
- HB_gain = SHL32((opus_val32)celt_rate, 9) / SHR32((opus_val32)celt_rate + st->stream_channels * HB_gain_ref, 6);
- HB_gain = HB_gain < (opus_val32)Q15ONE*6/7 ? HB_gain + Q15ONE/7 : Q15ONE;
+ HB_gain = Q15ONE - SHR32(celt_exp2(-celt_rate * QCONST16(1.f/1024, 10)), 1);
}
} else {
/* SILK gets all bits */
@@ -1569,7 +1734,6 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->silk_mode.bitRate += 3*rate_offset/5;
else
st->silk_mode.bitRate += rate_offset;
- bytes_target += rate_offset * frame_size / (8 * st->Fs);
}
st->silk_mode.payloadSize_ms = 1000 * frame_size / st->Fs;
@@ -1580,7 +1744,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
} else if (curr_bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) {
st->silk_mode.desiredInternalSampleRate = 12000;
} else {
- silk_assert( st->mode == MODE_HYBRID || curr_bandwidth == OPUS_BANDWIDTH_WIDEBAND );
+ celt_assert( st->mode == MODE_HYBRID || curr_bandwidth == OPUS_BANDWIDTH_WIDEBAND );
st->silk_mode.desiredInternalSampleRate = 16000;
}
if( st->mode == MODE_HYBRID ) {
@@ -1590,40 +1754,53 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->silk_mode.minInternalSampleRate = 8000;
}
+ st->silk_mode.maxInternalSampleRate = 16000;
if (st->mode == MODE_SILK_ONLY)
{
opus_int32 effective_max_rate = max_rate;
- st->silk_mode.maxInternalSampleRate = 16000;
if (frame_rate > 50)
effective_max_rate = effective_max_rate*2/3;
- if (effective_max_rate < 13000)
+ if (effective_max_rate < 8000)
{
st->silk_mode.maxInternalSampleRate = 12000;
st->silk_mode.desiredInternalSampleRate = IMIN(12000, st->silk_mode.desiredInternalSampleRate);
}
- if (effective_max_rate < 9600)
+ if (effective_max_rate < 7000)
{
st->silk_mode.maxInternalSampleRate = 8000;
st->silk_mode.desiredInternalSampleRate = IMIN(8000, st->silk_mode.desiredInternalSampleRate);
}
- } else {
- st->silk_mode.maxInternalSampleRate = 16000;
}
st->silk_mode.useCBR = !st->use_vbr;
/* Call SILK encoder for the low band */
- nBytes = IMIN(1275, max_data_bytes-1-redundancy_bytes);
- st->silk_mode.maxBits = nBytes*8;
- /* Only allow up to 90% of the bits for hybrid mode*/
- if (st->mode == MODE_HYBRID)
- st->silk_mode.maxBits = (opus_int32)st->silk_mode.maxBits*9/10;
+ /* Max bits for SILK, counting ToC, redundancy bytes, and optionally redundancy. */
+ st->silk_mode.maxBits = (max_data_bytes-1)*8;
+ if (redundancy && redundancy_bytes >= 2)
+ {
+ /* Counting 1 bit for redundancy position and 20 bits for flag+size (only for hybrid). */
+ st->silk_mode.maxBits -= redundancy_bytes*8 + 1;
+ if (st->mode == MODE_HYBRID)
+ st->silk_mode.maxBits -= 20;
+ }
if (st->silk_mode.useCBR)
{
- st->silk_mode.maxBits = (st->silk_mode.bitRate * frame_size / (st->Fs * 8))*8;
- /* Reduce the initial target to make it easier to reach the CBR rate */
- st->silk_mode.bitRate = IMAX(1, st->silk_mode.bitRate-2000);
+ if (st->mode == MODE_HYBRID)
+ {
+ st->silk_mode.maxBits = IMIN(st->silk_mode.maxBits, st->silk_mode.bitRate * frame_size / st->Fs);
+ }
+ } else {
+ /* Constrained VBR. */
+ if (st->mode == MODE_HYBRID)
+ {
+ /* Compute SILK bitrate corresponding to the max total bits available */
+ opus_int32 maxBitRate = compute_silk_rate_for_hybrid(st->silk_mode.maxBits*st->Fs / frame_size,
+ curr_bandwidth, st->Fs == 50 * frame_size, st->use_vbr, st->silk_mode.LBRR_coded,
+ st->stream_channels);
+ st->silk_mode.maxBits = maxBitRate * frame_size / st->Fs;
+ }
}
if (prefill)
@@ -1646,7 +1823,9 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
for (i=0;i<st->encoder_buffer*st->channels;i++)
pcm_silk[i] = FLOAT2INT16(st->delay_buffer[i]);
#endif
- silk_Encode( silk_enc, &st->silk_mode, pcm_silk, st->encoder_buffer, NULL, &zero, 1 );
+ silk_Encode( silk_enc, &st->silk_mode, pcm_silk, st->encoder_buffer, NULL, &zero, prefill, activity );
+ /* Prevent a second switch in the real encode call. */
+ st->silk_mode.opusCanSwitch = 0;
}
#ifdef FIXED_POINT
@@ -1655,20 +1834,14 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
for (i=0;i<frame_size*st->channels;i++)
pcm_silk[i] = FLOAT2INT16(pcm_buf[total_buffer*st->channels + i]);
#endif
- ret = silk_Encode( silk_enc, &st->silk_mode, pcm_silk, frame_size, &enc, &nBytes, 0 );
+ ret = silk_Encode( silk_enc, &st->silk_mode, pcm_silk, frame_size, &enc, &nBytes, 0, activity );
if( ret ) {
/*fprintf (stderr, "SILK encode error: %d\n", ret);*/
/* Handle error */
RESTORE_STACK;
return OPUS_INTERNAL_ERROR;
}
- if (nBytes==0)
- {
- st->rangeFinal = 0;
- data[-1] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels);
- RESTORE_STACK;
- return 1;
- }
+
/* Extract SILK internal bandwidth for signaling in first byte */
if( st->mode == MODE_SILK_ONLY ) {
if( st->silk_mode.internalSampleRate == 8000 ) {
@@ -1679,14 +1852,24 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
curr_bandwidth = OPUS_BANDWIDTH_WIDEBAND;
}
} else {
- silk_assert( st->silk_mode.internalSampleRate == 16000 );
+ celt_assert( st->silk_mode.internalSampleRate == 16000 );
+ }
+
+ st->silk_mode.opusCanSwitch = st->silk_mode.switchReady && !st->nonfinal_frame;
+
+ if (nBytes==0)
+ {
+ st->rangeFinal = 0;
+ data[-1] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels);
+ RESTORE_STACK;
+ return 1;
}
- st->silk_mode.opusCanSwitch = st->silk_mode.switchReady;
/* FIXME: How do we allocate the redundancy for CBR? */
if (st->silk_mode.opusCanSwitch)
{
- redundancy = 1;
+ redundancy_bytes = compute_redundancy_bytes(max_data_bytes, st->bitrate_bps, frame_rate, st->stream_channels);
+ redundancy = (redundancy_bytes != 0);
celt_to_silk = 0;
st->silk_bw_switch = 1;
}
@@ -1727,40 +1910,18 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (st->mode == MODE_HYBRID)
{
- int len;
-
- len = (ec_tell(&enc)+7)>>3;
- if (redundancy)
- len += st->mode == MODE_HYBRID ? 3 : 1;
if( st->use_vbr ) {
- nb_compr_bytes = len + bytes_target - (st->silk_mode.bitRate * frame_size) / (8 * st->Fs);
- } else {
- /* check if SILK used up too much */
- nb_compr_bytes = len > bytes_target ? len : bytes_target;
+ celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps-st->silk_mode.bitRate));
+ celt_encoder_ctl(celt_enc, OPUS_SET_VBR_CONSTRAINT(0));
}
} else {
if (st->use_vbr)
{
- opus_int32 bonus=0;
-#ifndef DISABLE_FLOAT_API
- if (st->variable_duration==OPUS_FRAMESIZE_VARIABLE && frame_size != st->Fs/50)
- {
- bonus = (60*st->stream_channels+40)*(st->Fs/frame_size-50);
- if (analysis_info.valid)
- bonus = (opus_int32)(bonus*(1.f+.5f*analysis_info.tonality));
- }
-#endif
celt_encoder_ctl(celt_enc, OPUS_SET_VBR(1));
celt_encoder_ctl(celt_enc, OPUS_SET_VBR_CONSTRAINT(st->vbr_constraint));
- celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps+bonus));
- nb_compr_bytes = max_data_bytes-1-redundancy_bytes;
- } else {
- nb_compr_bytes = bytes_target;
+ celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps));
}
}
-
- } else {
- nb_compr_bytes = 0;
}
ALLOC(tmp_prefill, st->channels*st->Fs/400, opus_val16);
@@ -1786,7 +1947,14 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
}
st->prev_HB_gain = HB_gain;
if (st->mode != MODE_HYBRID || st->stream_channels==1)
- st->silk_mode.stereoWidth_Q14 = IMIN((1<<14),2*IMAX(0,equiv_rate-30000));
+ {
+ if (equiv_rate > 32000)
+ st->silk_mode.stereoWidth_Q14 = 16384;
+ else if (equiv_rate < 16000)
+ st->silk_mode.stereoWidth_Q14 = 0;
+ else
+ st->silk_mode.stereoWidth_Q14 = 16384 - 2048*(opus_int32)(32000-equiv_rate)/(equiv_rate-14000);
+ }
if( !st->energy_masking && st->channels == 2 ) {
/* Apply stereo width reduction (at low bitrates) */
if( st->hybrid_stereo_width_Q14 < (1 << 14) || st->silk_mode.stereoWidth_Q14 < (1 << 14) ) {
@@ -1809,19 +1977,23 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if ( st->mode != MODE_CELT_ONLY && ec_tell(&enc)+17+20*(st->mode == MODE_HYBRID) <= 8*(max_data_bytes-1))
{
/* For SILK mode, the redundancy is inferred from the length */
- if (st->mode == MODE_HYBRID && (redundancy || ec_tell(&enc)+37 <= 8*nb_compr_bytes))
+ if (st->mode == MODE_HYBRID)
ec_enc_bit_logp(&enc, redundancy, 12);
if (redundancy)
{
int max_redundancy;
ec_enc_bit_logp(&enc, celt_to_silk, 1);
if (st->mode == MODE_HYBRID)
- max_redundancy = (max_data_bytes-1)-nb_compr_bytes;
+ {
+ /* Reserve the 8 bits needed for the redundancy length,
+ and at least a few bits for CELT if possible */
+ max_redundancy = (max_data_bytes-1)-((ec_tell(&enc)+8+3+7)>>3);
+ }
else
max_redundancy = (max_data_bytes-1)-((ec_tell(&enc)+7)>>3);
/* Target the same bit-rate for redundancy as for the rest,
up to a max of 257 bytes */
- redundancy_bytes = IMIN(max_redundancy, st->bitrate_bps/1600);
+ redundancy_bytes = IMIN(max_redundancy, redundancy_bytes);
redundancy_bytes = IMIN(257, IMAX(2, redundancy_bytes));
if (st->mode == MODE_HYBRID)
ec_enc_uint(&enc, redundancy_bytes-2, 256);
@@ -1843,7 +2015,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
ec_enc_done(&enc);
nb_compr_bytes = ret;
} else {
- nb_compr_bytes = IMIN((max_data_bytes-1)-redundancy_bytes, nb_compr_bytes);
+ nb_compr_bytes = (max_data_bytes-1)-redundancy_bytes;
ec_enc_shrink(&enc, nb_compr_bytes);
}
@@ -1851,6 +2023,12 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (redundancy || st->mode != MODE_SILK_ONLY)
celt_encoder_ctl(celt_enc, CELT_SET_ANALYSIS(&analysis_info));
#endif
+ if (st->mode == MODE_HYBRID) {
+ SILKInfo info;
+ info.signalType = st->silk_mode.signalType;
+ info.offset = st->silk_mode.offset;
+ celt_encoder_ctl(celt_enc, CELT_SET_SILK_INFO(&info));
+ }
/* 5 ms redundant frame for CELT->SILK */
if (redundancy && celt_to_silk)
@@ -1858,6 +2036,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
int err;
celt_encoder_ctl(celt_enc, CELT_SET_START_BAND(0));
celt_encoder_ctl(celt_enc, OPUS_SET_VBR(0));
+ celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(OPUS_BITRATE_MAX));
err = celt_encode_with_ec(celt_enc, pcm_buf, st->Fs/200, data+nb_compr_bytes, redundancy_bytes, NULL);
if (err < 0)
{
@@ -1881,15 +2060,25 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
celt_encode_with_ec(celt_enc, tmp_prefill, st->Fs/400, dummy, 2, NULL);
celt_encoder_ctl(celt_enc, CELT_SET_PREDICTION(0));
}
- /* If false, we already busted the budget and we'll end up with a "PLC packet" */
+ /* If false, we already busted the budget and we'll end up with a "PLC frame" */
if (ec_tell(&enc) <= 8*nb_compr_bytes)
{
+ /* Set the bitrate again if it was overridden in the redundancy code above*/
+ if (redundancy && celt_to_silk && st->mode==MODE_HYBRID && st->use_vbr)
+ celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps-st->silk_mode.bitRate));
+ celt_encoder_ctl(celt_enc, OPUS_SET_VBR(st->use_vbr));
ret = celt_encode_with_ec(celt_enc, pcm_buf, frame_size, NULL, nb_compr_bytes, &enc);
if (ret < 0)
{
RESTORE_STACK;
return OPUS_INTERNAL_ERROR;
}
+ /* Put CELT->SILK redundancy data in the right place. */
+ if (redundancy && celt_to_silk && st->mode==MODE_HYBRID && st->use_vbr)
+ {
+ OPUS_MOVE(data+ret, data+nb_compr_bytes, redundancy_bytes);
+ nb_compr_bytes = nb_compr_bytes+redundancy_bytes;
+ }
}
}
@@ -1905,7 +2094,15 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
celt_encoder_ctl(celt_enc, OPUS_RESET_STATE);
celt_encoder_ctl(celt_enc, CELT_SET_START_BAND(0));
celt_encoder_ctl(celt_enc, CELT_SET_PREDICTION(0));
+ celt_encoder_ctl(celt_enc, OPUS_SET_VBR(0));
+ celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(OPUS_BITRATE_MAX));
+ if (st->mode == MODE_HYBRID)
+ {
+ /* Shrink packet to what the encoder actually used. */
+ nb_compr_bytes = ret;
+ ec_enc_shrink(&enc, nb_compr_bytes);
+ }
/* NOTE: We could speed this up slightly (at the expense of code size) by just adding a function that prefills the buffer */
celt_encode_with_ec(celt_enc, pcm_buf+st->channels*(frame_size-N2-N4), N4, dummy, 2, NULL);
@@ -1935,6 +2132,22 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->first = 0;
+ /* DTX decision */
+#ifndef DISABLE_FLOAT_API
+ if (st->use_dtx && (analysis_info.valid || is_silence))
+ {
+ if (decide_dtx_mode(activity, &st->nb_no_activity_ms_Q1, 2*1000*frame_size/st->Fs))
+ {
+ st->rangeFinal = 0;
+ data[0] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels);
+ RESTORE_STACK;
+ return 1;
+ }
+ } else {
+ st->nb_no_activity_ms_Q1 = 0;
+ }
+#endif
+
/* In the unlikely case that the SILK encoder busted its target, tell
the decoder to call the PLC */
if (ec_tell(&enc) > (max_data_bytes-1)*8)
@@ -1962,7 +2175,6 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
if (!st->use_vbr)
{
if (opus_packet_pad(data, ret, max_data_bytes) != OPUS_OK)
-
{
RESTORE_STACK;
return OPUS_INTERNAL_ERROR;
@@ -1981,18 +2193,15 @@ opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_fra
{
int i, ret;
int frame_size;
- int delay_compensation;
VARDECL(opus_int16, in);
ALLOC_STACK;
- if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
- delay_compensation = 0;
- else
- delay_compensation = st->delay_compensation;
- frame_size = compute_frame_size(pcm, analysis_frame_size,
- st->variable_duration, st->channels, st->Fs, st->bitrate_bps,
- delay_compensation, downmix_float, st->analysis.subframe_mem);
-
+ frame_size = frame_size_select(analysis_frame_size, st->variable_duration, st->Fs);
+ if (frame_size <= 0)
+ {
+ RESTORE_STACK;
+ return OPUS_BAD_ARG;
+ }
ALLOC(in, frame_size*st->channels, opus_int16);
for (i=0;i<frame_size*st->channels;i++)
@@ -2008,18 +2217,7 @@ opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_fram
unsigned char *data, opus_int32 out_data_bytes)
{
int frame_size;
- int delay_compensation;
- if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
- delay_compensation = 0;
- else
- delay_compensation = st->delay_compensation;
- frame_size = compute_frame_size(pcm, analysis_frame_size,
- st->variable_duration, st->channels, st->Fs, st->bitrate_bps,
- delay_compensation, downmix_int
-#ifndef DISABLE_FLOAT_API
- , st->analysis.subframe_mem
-#endif
- );
+ frame_size = frame_size_select(analysis_frame_size, st->variable_duration, st->Fs);
return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 16,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_int, 0);
}
@@ -2030,18 +2228,15 @@ opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_fram
{
int i, ret;
int frame_size;
- int delay_compensation;
VARDECL(float, in);
ALLOC_STACK;
- if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
- delay_compensation = 0;
- else
- delay_compensation = st->delay_compensation;
- frame_size = compute_frame_size(pcm, analysis_frame_size,
- st->variable_duration, st->channels, st->Fs, st->bitrate_bps,
- delay_compensation, downmix_int, st->analysis.subframe_mem);
-
+ frame_size = frame_size_select(analysis_frame_size, st->variable_duration, st->Fs);
+ if (frame_size <= 0)
+ {
+ RESTORE_STACK;
+ return OPUS_BAD_ARG;
+ }
ALLOC(in, frame_size*st->channels, float);
for (i=0;i<frame_size*st->channels;i++)
@@ -2055,14 +2250,7 @@ opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_fra
unsigned char *data, opus_int32 out_data_bytes)
{
int frame_size;
- int delay_compensation;
- if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
- delay_compensation = 0;
- else
- delay_compensation = st->delay_compensation;
- frame_size = compute_frame_size(pcm, analysis_frame_size,
- st->variable_duration, st->channels, st->Fs, st->bitrate_bps,
- delay_compensation, downmix_float, st->analysis.subframe_mem);
+ frame_size = frame_size_select(analysis_frame_size, st->variable_duration, st->Fs);
return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 24,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_float, 1);
}
@@ -2093,6 +2281,9 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
break;
}
st->application = value;
+#ifndef DISABLE_FLOAT_API
+ st->analysis.application = value;
+#endif
}
break;
case OPUS_GET_APPLICATION_REQUEST:
@@ -2211,7 +2402,7 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
{
goto bad_arg;
}
- st->silk_mode.useDTX = value;
+ st->use_dtx = value;
}
break;
case OPUS_GET_DTX_REQUEST:
@@ -2221,7 +2412,7 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
{
goto bad_arg;
}
- *value = st->silk_mode.useDTX;
+ *value = st->use_dtx;
}
break;
case OPUS_SET_COMPLEXITY_REQUEST:
@@ -2422,15 +2613,15 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
case OPUS_SET_EXPERT_FRAME_DURATION_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
- if (value != OPUS_FRAMESIZE_ARG && value != OPUS_FRAMESIZE_2_5_MS &&
- value != OPUS_FRAMESIZE_5_MS && value != OPUS_FRAMESIZE_10_MS &&
- value != OPUS_FRAMESIZE_20_MS && value != OPUS_FRAMESIZE_40_MS &&
- value != OPUS_FRAMESIZE_60_MS && value != OPUS_FRAMESIZE_VARIABLE)
+ if (value != OPUS_FRAMESIZE_ARG && value != OPUS_FRAMESIZE_2_5_MS &&
+ value != OPUS_FRAMESIZE_5_MS && value != OPUS_FRAMESIZE_10_MS &&
+ value != OPUS_FRAMESIZE_20_MS && value != OPUS_FRAMESIZE_40_MS &&
+ value != OPUS_FRAMESIZE_60_MS && value != OPUS_FRAMESIZE_80_MS &&
+ value != OPUS_FRAMESIZE_100_MS && value != OPUS_FRAMESIZE_120_MS)
{
goto bad_arg;
}
st->variable_duration = value;
- celt_encoder_ctl(celt_enc, OPUS_SET_EXPERT_FRAME_DURATION(value));
}
break;
case OPUS_GET_EXPERT_FRAME_DURATION_REQUEST:
@@ -2459,6 +2650,26 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
*value = st->silk_mode.reducedDependency;
}
break;
+ case OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST:
+ {
+ opus_int32 value = va_arg(ap, opus_int32);
+ if(value<0 || value>1)
+ {
+ goto bad_arg;
+ }
+ celt_encoder_ctl(celt_enc, OPUS_SET_PHASE_INVERSION_DISABLED(value));
+ }
+ break;
+ case OPUS_GET_PHASE_INVERSION_DISABLED_REQUEST:
+ {
+ opus_int32 *value = va_arg(ap, opus_int32*);
+ if (!value)
+ {
+ goto bad_arg;
+ }
+ celt_encoder_ctl(celt_enc, OPUS_GET_PHASE_INVERSION_DISABLED(value));
+ }
+ break;
case OPUS_RESET_STATE:
{
void *silk_enc;
@@ -2507,7 +2718,33 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
ret = celt_encoder_ctl(celt_enc, OPUS_SET_ENERGY_MASK(value));
}
break;
-
+ case OPUS_GET_IN_DTX_REQUEST:
+ {
+ opus_int32 *value = va_arg(ap, opus_int32*);
+ if (!value)
+ {
+ goto bad_arg;
+ }
+ if (st->silk_mode.useDTX && (st->prev_mode == MODE_SILK_ONLY || st->prev_mode == MODE_HYBRID)) {
+ /* DTX determined by Silk. */
+ silk_encoder *silk_enc = (silk_encoder*)(void *)((char*)st+st->silk_enc_offset);
+ *value = silk_enc->state_Fxx[0].sCmn.noSpeechCounter >= NB_SPEECH_FRAMES_BEFORE_DTX;
+ /* Stereo: check second channel unless only the middle channel was encoded. */
+ if(*value == 1 && st->silk_mode.nChannelsInternal == 2 && silk_enc->prev_decode_only_middle == 0) {
+ *value = silk_enc->state_Fxx[1].sCmn.noSpeechCounter >= NB_SPEECH_FRAMES_BEFORE_DTX;
+ }
+ }
+#ifndef DISABLE_FLOAT_API
+ else if (st->use_dtx) {
+ /* DTX determined by Opus. */
+ *value = st->nb_no_activity_ms_Q1 >= NB_SPEECH_FRAMES_BEFORE_DTX*20*2;
+ }
+#endif
+ else {
+ *value = 0;
+ }
+ }
+ break;
case CELT_GET_MODE_REQUEST:
{
const CELTMode ** value = va_arg(ap, const CELTMode**);
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-09 16:58:09 +0000