#define FIXR(a) ((int)((a) * FRAC_ONE + 0.5))
#define FRAC_RND(a) (((a) + (FRAC_ONE/2)) >> FRAC_BITS)
+#define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
+//#define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32) //gcc 3.4 creates an incredibly bloated mess out of this
+static always_inline int MULH(int a, int b){
+ return ((int64_t)(a) * (int64_t)(b))>>32;
+}
+
#if FRAC_BITS <= 15
typedef int16_t MPA_INT;
#else
unsigned int dither_state;
} MPADecodeContext;
+/**
+ * Context for MP3On4 decoder
+ */
+typedef struct MP3On4DecodeContext {
+ int frames; ///< number of mp3 frames per block (number of mp3 decoder instances)
+ int chan_cfg; ///< channel config number
+ MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance
+} MP3On4DecodeContext;
+
/* layer 3 "granule" */
typedef struct GranuleDef {
uint8_t scfsi;
/* computed from band_size_long */
static uint16_t band_index_long[9][23];
/* XXX: free when all decoders are closed */
-#define TABLE_4_3_SIZE (8191 + 16)
+#define TABLE_4_3_SIZE (8191 + 16)*4
static int8_t *table_4_3_exp;
-#if FRAC_BITS <= 15
-static uint16_t *table_4_3_value;
-#else
static uint32_t *table_4_3_value;
-#endif
/* intensity stereo coef table */
static int32_t is_table[2][16];
static int32_t is_table_lsf[2][2][16];
SCALE_GEN(4.0 / 9.0), /* 9 steps */
};
-/* 2^(n/4) */
-static uint32_t scale_factor_mult3[4] = {
- FIXR(1.0),
- FIXR(1.18920711500272106671),
- FIXR(1.41421356237309504880),
- FIXR(1.68179283050742908605),
-};
-
void ff_mpa_synth_init(MPA_INT *window);
static MPA_INT window[512] __attribute__((aligned(16)));
/* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */
static inline int l3_unscale(int value, int exponent)
{
-#if FRAC_BITS <= 15
unsigned int m;
-#else
- uint64_t m;
-#endif
int e;
- e = table_4_3_exp[value];
- e += (exponent >> 2);
- e = FRAC_BITS - e;
-#if FRAC_BITS <= 15
+ e = table_4_3_exp [4*value + (exponent&3)];
+ m = table_4_3_value[4*value + (exponent&3)];
+ e -= (exponent >> 2);
+ assert(e>=1);
if (e > 31)
-#else
- if (e > 63)
-#endif
return 0;
- m = table_4_3_value[value];
-#if FRAC_BITS <= 15
- m = (m * scale_factor_mult3[exponent & 3]);
m = (m + (1 << (e-1))) >> e;
+
return m;
-#else
- m = MUL64(m, scale_factor_mult3[exponent & 3]);
- m = (m + (uint64_t_C(1) << (e-1))) >> e;
- return m;
-#endif
}
/* all integer n^(4/3) computation code */
static int dev_4_3_coefs[DEV_ORDER];
+#if 0 /* unused */
static int pow_mult3[3] = {
POW_FIX(1.0),
POW_FIX(1.25992104989487316476),
POW_FIX(1.58740105196819947474),
};
+#endif
static void int_pow_init(void)
{
}
}
+#if 0 /* unused, remove? */
/* return the mantissa and the binary exponent */
static int int_pow(int i, int *exp_ptr)
{
*exp_ptr = eq;
return a;
}
+#endif
static int decode_init(AVCodecContext * avctx)
{
avctx->sample_fmt= SAMPLE_FMT_S16;
#endif
- if(avctx->antialias_algo == FF_AA_INT)
+ if(avctx->antialias_algo != FF_AA_FLOAT)
s->compute_antialias= compute_antialias_integer;
else
s->compute_antialias= compute_antialias_float;
int_pow_init();
for(i=1;i<TABLE_4_3_SIZE;i++) {
+ double f, fm;
int e, m;
- m = int_pow(i, &e);
-#if 0
- /* test code */
- {
- double f, fm;
- int e1, m1;
- f = pow((double)i, 4.0 / 3.0);
- fm = frexp(f, &e1);
- m1 = FIXR(2 * fm);
-#if FRAC_BITS <= 15
- if ((unsigned short)m1 != m1) {
- m1 = m1 >> 1;
- e1++;
- }
-#endif
- e1--;
- if (m != m1 || e != e1) {
- printf("%4d: m=%x m1=%x e=%d e1=%d\n",
- i, m, m1, e, e1);
- }
- }
-#endif
+ f = pow((double)(i/4), 4.0 / 3.0) * pow(2, (i&3)*0.25);
+ fm = frexp(f, &e);
+ m = (uint32_t)(fm*(1LL<<31) + 0.5);
+ e+= FRAC_BITS - 31 + 5;
+
/* normalized to FRAC_BITS */
table_4_3_value[i] = m;
- table_4_3_exp[i] = e;
+// av_log(NULL, AV_LOG_DEBUG, "%d %d %f\n", i, m, pow((double)i, 4.0 / 3.0));
+ table_4_3_exp[i] = -e;
}
for(i=0;i<7;i++) {
ci = ci_table[i];
cs = 1.0 / sqrt(1.0 + ci * ci);
ca = cs * ci;
- csa_table[i][0] = FIX(cs);
- csa_table[i][1] = FIX(ca);
- csa_table[i][2] = FIX(ca) + FIX(cs);
- csa_table[i][3] = FIX(ca) - FIX(cs);
+ csa_table[i][0] = FIXHR(cs/4);
+ csa_table[i][1] = FIXHR(ca/4);
+ csa_table[i][2] = FIXHR(ca/4) + FIXHR(cs/4);
+ csa_table[i][3] = FIXHR(ca/4) - FIXHR(cs/4);
csa_table_float[i][0] = cs;
csa_table_float[i][1] = ca;
csa_table_float[i][2] = ca + cs;
csa_table_float[i][3] = ca - cs;
// printf("%d %d %d %d\n", FIX(cs), FIX(cs-1), FIX(ca), FIX(cs)-FIX(ca));
+// av_log(NULL, AV_LOG_DEBUG,"%f %f %f %f\n", cs, ca, ca+cs, ca-cs);
}
/* compute mdct windows */
for(i=0;i<36;i++) {
- int v;
- v = FIXR(sin(M_PI * (i + 0.5) / 36.0));
- mdct_win[0][i] = v;
- mdct_win[1][i] = v;
- mdct_win[3][i] = v;
- }
- for(i=0;i<6;i++) {
- mdct_win[1][18 + i] = FIXR(1.0);
- mdct_win[1][24 + i] = FIXR(sin(M_PI * ((i + 6) + 0.5) / 12.0));
- mdct_win[1][30 + i] = FIXR(0.0);
-
- mdct_win[3][i] = FIXR(0.0);
- mdct_win[3][6 + i] = FIXR(sin(M_PI * (i + 0.5) / 12.0));
- mdct_win[3][12 + i] = FIXR(1.0);
+ for(j=0; j<4; j++){
+ double d;
+
+ if(j==2 && i%3 != 1)
+ continue;
+
+ d= sin(M_PI * (i + 0.5) / 36.0);
+ if(j==1){
+ if (i>=30) d= 0;
+ else if(i>=24) d= sin(M_PI * (i - 18 + 0.5) / 12.0);
+ else if(i>=18) d= 1;
+ }else if(j==3){
+ if (i< 6) d= 0;
+ else if(i< 12) d= sin(M_PI * (i - 6 + 0.5) / 12.0);
+ else if(i< 18) d= 1;
+ }
+ //merge last stage of imdct into the window coefficients
+ d*= 0.5 / cos(M_PI*(2*i + 19)/72);
+
+ if(j==2)
+ mdct_win[j][i/3] = FIXHR((d / (1<<5)));
+ else
+ mdct_win[j][i ] = FIXHR((d / (1<<5)));
+// av_log(NULL, AV_LOG_DEBUG, "%2d %d %f\n", i,j,d / (1<<5));
+ }
}
- for(i=0;i<12;i++)
- mdct_win[2][i] = FIXR(sin(M_PI * (i + 0.5) / 12.0));
-
/* NOTE: we do frequency inversion adter the MDCT by changing
the sign of the right window coefs */
for(j=0;j<4;j++) {
*synth_buf_offset = offset;
}
-/* cos(pi*i/24) */
-#define C1 FIXR(0.99144486137381041114)
-#define C3 FIXR(0.92387953251128675612)
-#define C5 FIXR(0.79335334029123516458)
-#define C7 FIXR(0.60876142900872063941)
-#define C9 FIXR(0.38268343236508977173)
-#define C11 FIXR(0.13052619222005159154)
-
-/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
- cases. */
-static void imdct12(int *out, int *in)
-{
- int tmp;
- int64_t in1_3, in1_9, in4_3, in4_9;
-
- in1_3 = MUL64(in[1], C3);
- in1_9 = MUL64(in[1], C9);
- in4_3 = MUL64(in[4], C3);
- in4_9 = MUL64(in[4], C9);
-
- tmp = FRAC_RND(MUL64(in[0], C7) - in1_3 - MUL64(in[2], C11) +
- MUL64(in[3], C1) - in4_9 - MUL64(in[5], C5));
- out[0] = tmp;
- out[5] = -tmp;
- tmp = FRAC_RND(MUL64(in[0] - in[3], C9) - in1_3 +
- MUL64(in[2] + in[5], C3) - in4_9);
- out[1] = tmp;
- out[4] = -tmp;
- tmp = FRAC_RND(MUL64(in[0], C11) - in1_9 + MUL64(in[2], C7) -
- MUL64(in[3], C5) + in4_3 - MUL64(in[5], C1));
- out[2] = tmp;
- out[3] = -tmp;
- tmp = FRAC_RND(MUL64(-in[0], C5) + in1_9 + MUL64(in[2], C1) +
- MUL64(in[3], C11) - in4_3 - MUL64(in[5], C7));
- out[6] = tmp;
- out[11] = tmp;
- tmp = FRAC_RND(MUL64(-in[0] + in[3], C3) - in1_9 +
- MUL64(in[2] + in[5], C9) + in4_3);
- out[7] = tmp;
- out[10] = tmp;
- tmp = FRAC_RND(-MUL64(in[0], C1) - in1_3 - MUL64(in[2], C5) -
- MUL64(in[3], C7) - in4_9 - MUL64(in[5], C11));
- out[8] = tmp;
- out[9] = tmp;
-}
-
-#undef C1
-#undef C3
-#undef C5
-#undef C7
-#undef C9
-#undef C11
-
-/* cos(pi*i/18) */
-#define C1 FIXR(0.98480775301220805936)
-#define C2 FIXR(0.93969262078590838405)
-#define C3 FIXR(0.86602540378443864676)
-#define C4 FIXR(0.76604444311897803520)
-#define C5 FIXR(0.64278760968653932632)
-#define C6 FIXR(0.5)
-#define C7 FIXR(0.34202014332566873304)
-#define C8 FIXR(0.17364817766693034885)
+#define C3 FIXHR(0.86602540378443864676/2)
/* 0.5 / cos(pi*(2*i+1)/36) */
static const int icos36[9] = {
FIXR(0.50190991877167369479),
- FIXR(0.51763809020504152469),
+ FIXR(0.51763809020504152469), //0
FIXR(0.55168895948124587824),
FIXR(0.61038729438072803416),
- FIXR(0.70710678118654752439),
+ FIXR(0.70710678118654752439), //1
FIXR(0.87172339781054900991),
FIXR(1.18310079157624925896),
- FIXR(1.93185165257813657349),
+ FIXR(1.93185165257813657349), //2
FIXR(5.73685662283492756461),
};
-static const int icos72[18] = {
- /* 0.5 / cos(pi*(2*i+19)/72) */
- FIXR(0.74009361646113053152),
- FIXR(0.82133981585229078570),
- FIXR(0.93057949835178895673),
- FIXR(1.08284028510010010928),
- FIXR(1.30656296487637652785),
- FIXR(1.66275476171152078719),
- FIXR(2.31011315767264929558),
- FIXR(3.83064878777019433457),
- FIXR(11.46279281302667383546),
-
- /* 0.5 / cos(pi*(2*(i + 18) +19)/72) */
- FIXR(-0.67817085245462840086),
- FIXR(-0.63023620700513223342),
- FIXR(-0.59284452371708034528),
- FIXR(-0.56369097343317117734),
- FIXR(-0.54119610014619698439),
- FIXR(-0.52426456257040533932),
- FIXR(-0.51213975715725461845),
- FIXR(-0.50431448029007636036),
- FIXR(-0.50047634258165998492),
-};
+/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
+ cases. */
+static void imdct12(int *out, int *in)
+{
+ int in0, in1, in2, in3, in4, in5, t1, t2;
+
+ in0= in[0*3];
+ in1= in[1*3] + in[0*3];
+ in2= in[2*3] + in[1*3];
+ in3= in[3*3] + in[2*3];
+ in4= in[4*3] + in[3*3];
+ in5= in[5*3] + in[4*3];
+ in5 += in3;
+ in3 += in1;
+
+ in2= MULH(2*in2, C3);
+ in3= MULH(2*in3, C3);
+
+ t1 = in0 - in4;
+ t2 = MULL(in1 - in5, icos36[4]);
+
+ out[ 7]=
+ out[10]= t1 + t2;
+ out[ 1]=
+ out[ 4]= t1 - t2;
+
+ in0 += in4>>1;
+ in4 = in0 + in2;
+ in1 += in5>>1;
+ in5 = MULL(in1 + in3, icos36[1]);
+ out[ 8]=
+ out[ 9]= in4 + in5;
+ out[ 2]=
+ out[ 3]= in4 - in5;
+
+ in0 -= in2;
+ in1 = MULL(in1 - in3, icos36[7]);
+ out[ 0]=
+ out[ 5]= in0 - in1;
+ out[ 6]=
+ out[11]= in0 + in1;
+}
+
+/* cos(pi*i/18) */
+#define C1 FIXHR(0.98480775301220805936/2)
+#define C2 FIXHR(0.93969262078590838405/2)
+#define C3 FIXHR(0.86602540378443864676/2)
+#define C4 FIXHR(0.76604444311897803520/2)
+#define C5 FIXHR(0.64278760968653932632/2)
+#define C6 FIXHR(0.5/2)
+#define C7 FIXHR(0.34202014332566873304/2)
+#define C8 FIXHR(0.17364817766693034885/2)
+
/* using Lee like decomposition followed by hand coded 9 points DCT */
-static void imdct36(int *out, int *in)
+static void imdct36(int *out, int *buf, int *in, int *win)
{
int i, j, t0, t1, t2, t3, s0, s1, s2, s3;
int tmp[18], *tmp1, *in1;
- int64_t in3_3, in6_6;
for(i=17;i>=1;i--)
in[i] += in[i-1];
for(j=0;j<2;j++) {
tmp1 = tmp + j;
in1 = in + j;
+#if 0
+//more accurate but slower
+ int64_t t0, t1, t2, t3;
+ t2 = in1[2*4] + in1[2*8] - in1[2*2];
+
+ t3 = (in1[2*0] + (int64_t)(in1[2*6]>>1))<<32;
+ t1 = in1[2*0] - in1[2*6];
+ tmp1[ 6] = t1 - (t2>>1);
+ tmp1[16] = t1 + t2;
+
+ t0 = MUL64(2*(in1[2*2] + in1[2*4]), C2);
+ t1 = MUL64( in1[2*4] - in1[2*8] , -2*C8);
+ t2 = MUL64(2*(in1[2*2] + in1[2*8]), -C4);
+
+ tmp1[10] = (t3 - t0 - t2) >> 32;
+ tmp1[ 2] = (t3 + t0 + t1) >> 32;
+ tmp1[14] = (t3 + t2 - t1) >> 32;
+
+ tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
+ t2 = MUL64(2*(in1[2*1] + in1[2*5]), C1);
+ t3 = MUL64( in1[2*5] - in1[2*7] , -2*C7);
+ t0 = MUL64(2*in1[2*3], C3);
+
+ t1 = MUL64(2*(in1[2*1] + in1[2*7]), -C5);
+
+ tmp1[ 0] = (t2 + t3 + t0) >> 32;
+ tmp1[12] = (t2 + t1 - t0) >> 32;
+ tmp1[ 8] = (t3 - t1 - t0) >> 32;
+#else
+ t2 = in1[2*4] + in1[2*8] - in1[2*2];
+
+ t3 = in1[2*0] + (in1[2*6]>>1);
+ t1 = in1[2*0] - in1[2*6];
+ tmp1[ 6] = t1 - (t2>>1);
+ tmp1[16] = t1 + t2;
+
+ t0 = MULH(2*(in1[2*2] + in1[2*4]), C2);
+ t1 = MULH( in1[2*4] - in1[2*8] , -2*C8);
+ t2 = MULH(2*(in1[2*2] + in1[2*8]), -C4);
+
+ tmp1[10] = t3 - t0 - t2;
+ tmp1[ 2] = t3 + t0 + t1;
+ tmp1[14] = t3 + t2 - t1;
+
+ tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
+ t2 = MULH(2*(in1[2*1] + in1[2*5]), C1);
+ t3 = MULH( in1[2*5] - in1[2*7] , -2*C7);
+ t0 = MULH(2*in1[2*3], C3);
+
+ t1 = MULH(2*(in1[2*1] + in1[2*7]), -C5);
- in3_3 = MUL64(in1[2*3], C3);
- in6_6 = MUL64(in1[2*6], C6);
-
- tmp1[0] = FRAC_RND(MUL64(in1[2*1], C1) + in3_3 +
- MUL64(in1[2*5], C5) + MUL64(in1[2*7], C7));
- tmp1[2] = in1[2*0] + FRAC_RND(MUL64(in1[2*2], C2) +
- MUL64(in1[2*4], C4) + in6_6 +
- MUL64(in1[2*8], C8));
- tmp1[4] = FRAC_RND(MUL64(in1[2*1] - in1[2*5] - in1[2*7], C3));
- tmp1[6] = FRAC_RND(MUL64(in1[2*2] - in1[2*4] - in1[2*8], C6)) -
- in1[2*6] + in1[2*0];
- tmp1[8] = FRAC_RND(MUL64(in1[2*1], C5) - in3_3 -
- MUL64(in1[2*5], C7) + MUL64(in1[2*7], C1));
- tmp1[10] = in1[2*0] + FRAC_RND(MUL64(-in1[2*2], C8) -
- MUL64(in1[2*4], C2) + in6_6 +
- MUL64(in1[2*8], C4));
- tmp1[12] = FRAC_RND(MUL64(in1[2*1], C7) - in3_3 +
- MUL64(in1[2*5], C1) -
- MUL64(in1[2*7], C5));
- tmp1[14] = in1[2*0] + FRAC_RND(MUL64(-in1[2*2], C4) +
- MUL64(in1[2*4], C8) + in6_6 -
- MUL64(in1[2*8], C2));
- tmp1[16] = in1[2*0] - in1[2*2] + in1[2*4] - in1[2*6] + in1[2*8];
+ tmp1[ 0] = t2 + t3 + t0;
+ tmp1[12] = t2 + t1 - t0;
+ tmp1[ 8] = t3 - t1 - t0;
+#endif
}
i = 0;
s1 = MULL(t3 + t2, icos36[j]);
s3 = MULL(t3 - t2, icos36[8 - j]);
- t0 = MULL(s0 + s1, icos72[9 + 8 - j]);
- t1 = MULL(s0 - s1, icos72[8 - j]);
- out[18 + 9 + j] = t0;
- out[18 + 8 - j] = t0;
- out[9 + j] = -t1;
- out[8 - j] = t1;
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + j)*SBLIMIT] = MULH(t1, win[9 + j]) + buf[9 + j];
+ out[(8 - j)*SBLIMIT] = MULH(t1, win[8 - j]) + buf[8 - j];
+ buf[9 + j] = MULH(t0, win[18 + 9 + j]);
+ buf[8 - j] = MULH(t0, win[18 + 8 - j]);
- t0 = MULL(s2 + s3, icos72[9+j]);
- t1 = MULL(s2 - s3, icos72[j]);
- out[18 + 9 + (8 - j)] = t0;
- out[18 + j] = t0;
- out[9 + (8 - j)] = -t1;
- out[j] = t1;
+ t0 = s2 + s3;
+ t1 = s2 - s3;
+ out[(9 + 8 - j)*SBLIMIT] = MULH(t1, win[9 + 8 - j]) + buf[9 + 8 - j];
+ out[( j)*SBLIMIT] = MULH(t1, win[ j]) + buf[ j];
+ buf[9 + 8 - j] = MULH(t0, win[18 + 9 + 8 - j]);
+ buf[ + j] = MULH(t0, win[18 + j]);
i += 4;
}
s0 = tmp[16];
s1 = MULL(tmp[17], icos36[4]);
- t0 = MULL(s0 + s1, icos72[9 + 4]);
- t1 = MULL(s0 - s1, icos72[4]);
- out[18 + 9 + 4] = t0;
- out[18 + 8 - 4] = t0;
- out[9 + 4] = -t1;
- out[8 - 4] = t1;
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + 4)*SBLIMIT] = MULH(t1, win[9 + 4]) + buf[9 + 4];
+ out[(8 - 4)*SBLIMIT] = MULH(t1, win[8 - 4]) + buf[8 - 4];
+ buf[9 + 4] = MULH(t0, win[18 + 9 + 4]);
+ buf[8 - 4] = MULH(t0, win[18 + 8 - 4]);
}
/* header decoding. MUST check the header before because no
static void compute_antialias_integer(MPADecodeContext *s,
GranuleDef *g)
{
- int32_t *ptr, *p0, *p1, *csa;
- int n, i, j;
+ int32_t *ptr, *csa;
+ int n, i;
/* we antialias only "long" bands */
if (g->block_type == 2) {
ptr = g->sb_hybrid + 18;
for(i = n;i > 0;i--) {
- p0 = ptr - 1;
- p1 = ptr;
- csa = &csa_table[0][0];
- for(j=0;j<4;j++) {
- int tmp0 = *p0;
- int tmp1 = *p1;
-#if 0
- *p0 = FRAC_RND(MUL64(tmp0, csa[0]) - MUL64(tmp1, csa[1]));
- *p1 = FRAC_RND(MUL64(tmp0, csa[1]) + MUL64(tmp1, csa[0]));
-#else
- int64_t tmp2= MUL64(tmp0 + tmp1, csa[0]);
- *p0 = FRAC_RND(tmp2 - MUL64(tmp1, csa[2]));
- *p1 = FRAC_RND(tmp2 + MUL64(tmp0, csa[3]));
-#endif
- p0--; p1++;
- csa += 4;
- tmp0 = *p0;
- tmp1 = *p1;
-#if 0
- *p0 = FRAC_RND(MUL64(tmp0, csa[0]) - MUL64(tmp1, csa[1]));
- *p1 = FRAC_RND(MUL64(tmp0, csa[1]) + MUL64(tmp1, csa[0]));
-#else
- tmp2= MUL64(tmp0 + tmp1, csa[0]);
- *p0 = FRAC_RND(tmp2 - MUL64(tmp1, csa[2]));
- *p1 = FRAC_RND(tmp2 + MUL64(tmp0, csa[3]));
-#endif
- p0--; p1++;
- csa += 4;
- }
+ int tmp0, tmp1, tmp2;
+ csa = &csa_table[0][0];
+#define INT_AA(j) \
+ tmp0 = ptr[-1-j];\
+ tmp1 = ptr[ j];\
+ tmp2= MULH(tmp0 + tmp1, csa[0+4*j]);\
+ ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa[2+4*j]));\
+ ptr[ j] = 4*(tmp2 + MULH(tmp0, csa[3+4*j]));
+
+ INT_AA(0)
+ INT_AA(1)
+ INT_AA(2)
+ INT_AA(3)
+ INT_AA(4)
+ INT_AA(5)
+ INT_AA(6)
+ INT_AA(7)
+
ptr += 18;
}
}
static void compute_antialias_float(MPADecodeContext *s,
GranuleDef *g)
{
- int32_t *ptr, *p0, *p1;
- int n, i, j;
+ int32_t *ptr;
+ int n, i;
/* we antialias only "long" bands */
if (g->block_type == 2) {
ptr = g->sb_hybrid + 18;
for(i = n;i > 0;i--) {
+ float tmp0, tmp1;
float *csa = &csa_table_float[0][0];
- p0 = ptr - 1;
- p1 = ptr;
- for(j=0;j<4;j++) {
- float tmp0 = *p0;
- float tmp1 = *p1;
-#if 1
- *p0 = lrintf(tmp0 * csa[0] - tmp1 * csa[1]);
- *p1 = lrintf(tmp0 * csa[1] + tmp1 * csa[0]);
-#else
- float tmp2= (tmp0 + tmp1) * csa[0];
- *p0 = lrintf(tmp2 - tmp1 * csa[2]);
- *p1 = lrintf(tmp2 + tmp0 * csa[3]);
-#endif
- p0--; p1++;
- csa += 4;
- tmp0 = *p0;
- tmp1 = *p1;
-#if 1
- *p0 = lrintf(tmp0 * csa[0] - tmp1 * csa[1]);
- *p1 = lrintf(tmp0 * csa[1] + tmp1 * csa[0]);
-#else
- tmp2= (tmp0 + tmp1) * csa[0];
- *p0 = lrintf(tmp2 - tmp1 * csa[2]);
- *p1 = lrintf(tmp2 + tmp0 * csa[3]);
-#endif
- p0--; p1++;
- csa += 4;
- }
+#define FLOAT_AA(j)\
+ tmp0= ptr[-1-j];\
+ tmp1= ptr[ j];\
+ ptr[-1-j] = lrintf(tmp0 * csa[0+4*j] - tmp1 * csa[1+4*j]);\
+ ptr[ j] = lrintf(tmp0 * csa[1+4*j] + tmp1 * csa[0+4*j]);
+
+ FLOAT_AA(0)
+ FLOAT_AA(1)
+ FLOAT_AA(2)
+ FLOAT_AA(3)
+ FLOAT_AA(4)
+ FLOAT_AA(5)
+ FLOAT_AA(6)
+ FLOAT_AA(7)
+
ptr += 18;
}
}
int32_t *sb_samples,
int32_t *mdct_buf)
{
- int32_t *ptr, *win, *win1, *buf, *buf2, *out_ptr, *ptr1;
- int32_t in[6];
- int32_t out[36];
+ int32_t *ptr, *win, *win1, *buf, *out_ptr, *ptr1;
int32_t out2[12];
- int i, j, k, mdct_long_end, v, sblimit;
+ int i, j, mdct_long_end, v, sblimit;
/* find last non zero block */
ptr = g->sb_hybrid + 576;
buf = mdct_buf;
ptr = g->sb_hybrid;
for(j=0;j<mdct_long_end;j++) {
- imdct36(out, ptr);
/* apply window & overlap with previous buffer */
out_ptr = sb_samples + j;
/* select window */
win1 = mdct_win[g->block_type];
/* select frequency inversion */
win = win1 + ((4 * 36) & -(j & 1));
- for(i=0;i<18;i++) {
- *out_ptr = MULL(out[i], win[i]) + buf[i];
- buf[i] = MULL(out[i + 18], win[i + 18]);
- out_ptr += SBLIMIT;
- }
+ imdct36(out_ptr, buf, ptr, win);
+ out_ptr += 18*SBLIMIT;
ptr += 18;
buf += 18;
}
for(j=mdct_long_end;j<sblimit;j++) {
- for(i=0;i<6;i++) {
- out[i] = 0;
- out[6 + i] = 0;
- out[30+i] = 0;
- }
/* select frequency inversion */
win = mdct_win[2] + ((4 * 36) & -(j & 1));
- buf2 = out + 6;
- for(k=0;k<3;k++) {
- /* reorder input for short mdct */
- ptr1 = ptr + k;
- for(i=0;i<6;i++) {
- in[i] = *ptr1;
- ptr1 += 3;
- }
- imdct12(out2, in);
- /* apply 12 point window and do small overlap */
- for(i=0;i<6;i++) {
- buf2[i] = MULL(out2[i], win[i]) + buf2[i];
- buf2[i + 6] = MULL(out2[i + 6], win[i + 6]);
- }
- buf2 += 6;
- }
- /* overlap */
out_ptr = sb_samples + j;
- for(i=0;i<18;i++) {
- *out_ptr = out[i] + buf[i];
- buf[i] = out[i + 18];
+
+ for(i=0; i<6; i++){
+ *out_ptr = buf[i];
+ out_ptr += SBLIMIT;
+ }
+ imdct12(out2, ptr + 0);
+ for(i=0;i<6;i++) {
+ *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*1];
+ buf[i + 6*2] = MULH(out2[i + 6], win[i + 6]);
+ out_ptr += SBLIMIT;
+ }
+ imdct12(out2, ptr + 1);
+ for(i=0;i<6;i++) {
+ *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*2];
+ buf[i + 6*0] = MULH(out2[i + 6], win[i + 6]);
out_ptr += SBLIMIT;
}
+ imdct12(out2, ptr + 2);
+ for(i=0;i<6;i++) {
+ buf[i + 6*0] = MULH(out2[i], win[i]) + buf[i + 6*0];
+ buf[i + 6*1] = MULH(out2[i + 6], win[i + 6]);
+ buf[i + 6*2] = 0;
+ }
ptr += 18;
buf += 18;
}
}
+/* Next 3 arrays are indexed by channel config number (passed via codecdata) */
+static int mp3Frames[16] = {0,1,1,2,3,3,4,5,2}; /* number of mp3 decoder instances */
+static int mp3Channels[16] = {0,1,2,3,4,5,6,8,4}; /* total output channels */
+/* offsets into output buffer, assume output order is FL FR BL BR C LFE */
+static int chan_offset[9][5] = {
+ {0},
+ {0}, // C
+ {0}, // FLR
+ {2,0}, // C FLR
+ {2,0,3}, // C FLR BS
+ {4,0,2}, // C FLR BLRS
+ {4,0,2,5}, // C FLR BLRS LFE
+ {4,0,2,6,5}, // C FLR BLRS BLR LFE
+ {0,2} // FLR BLRS
+};
+
+
+static int decode_init_mp3on4(AVCodecContext * avctx)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ int i;
+
+ if ((avctx->extradata_size < 2) || (avctx->extradata == NULL)) {
+ av_log(avctx, AV_LOG_ERROR, "Codec extradata missing or too short.\n");
+ return -1;
+ }
+
+ s->chan_cfg = (((unsigned char *)avctx->extradata)[1] >> 3) & 0x0f;
+ s->frames = mp3Frames[s->chan_cfg];
+ if(!s->frames) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid channel config number.\n");
+ return -1;
+ }
+ avctx->channels = mp3Channels[s->chan_cfg];
+
+ /* Init the first mp3 decoder in standard way, so that all tables get builded
+ * We replace avctx->priv_data with the context of the first decoder so that
+ * decode_init() does not have to be changed.
+ * Other decoders will be inited here copying data from the first context
+ */
+ // Allocate zeroed memory for the first decoder context
+ s->mp3decctx[0] = av_mallocz(sizeof(MPADecodeContext));
+ // Put decoder context in place to make init_decode() happy
+ avctx->priv_data = s->mp3decctx[0];
+ decode_init(avctx);
+ // Restore mp3on4 context pointer
+ avctx->priv_data = s;
+ s->mp3decctx[0]->adu_mode = 1; // Set adu mode
+
+ /* Create a separate codec/context for each frame (first is already ok).
+ * Each frame is 1 or 2 channels - up to 5 frames allowed
+ */
+ for (i = 1; i < s->frames; i++) {
+ s->mp3decctx[i] = av_mallocz(sizeof(MPADecodeContext));
+ s->mp3decctx[i]->compute_antialias = s->mp3decctx[0]->compute_antialias;
+ s->mp3decctx[i]->inbuf = &s->mp3decctx[i]->inbuf1[0][BACKSTEP_SIZE];
+ s->mp3decctx[i]->inbuf_ptr = s->mp3decctx[i]->inbuf;
+ s->mp3decctx[i]->adu_mode = 1;
+ }
+
+ return 0;
+}
+
+
+static int decode_close_mp3on4(AVCodecContext * avctx)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ int i;
+
+ for (i = 0; i < s->frames; i++)
+ if (s->mp3decctx[i])
+ av_free(s->mp3decctx[i]);
+
+ return 0;
+}
+
+
+static int decode_frame_mp3on4(AVCodecContext * avctx,
+ void *data, int *data_size,
+ uint8_t * buf, int buf_size)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ MPADecodeContext *m;
+ int len, out_size = 0;
+ uint32_t header;
+ OUT_INT *out_samples = data;
+ OUT_INT decoded_buf[MPA_FRAME_SIZE * MPA_MAX_CHANNELS];
+ OUT_INT *outptr, *bp;
+ int fsize;
+ unsigned char *start2 = buf, *start;
+ int fr, i, j, n;
+ int off = avctx->channels;
+ int *coff = chan_offset[s->chan_cfg];
+
+ len = buf_size;
+
+ // Discard too short frames
+ if (buf_size < HEADER_SIZE) {
+ *data_size = 0;
+ return buf_size;
+ }
+
+ // If only one decoder interleave is not needed
+ outptr = s->frames == 1 ? out_samples : decoded_buf;
+
+ for (fr = 0; fr < s->frames; fr++) {
+ start = start2;
+ fsize = (start[0] << 4) | (start[1] >> 4);
+ start2 += fsize;
+ if (fsize > len)
+ fsize = len;
+ len -= fsize;
+ if (fsize > MPA_MAX_CODED_FRAME_SIZE)
+ fsize = MPA_MAX_CODED_FRAME_SIZE;
+ m = s->mp3decctx[fr];
+ assert (m != NULL);
+ /* copy original to new */
+ m->inbuf_ptr = m->inbuf + fsize;
+ memcpy(m->inbuf, start, fsize);
+
+ // Get header
+ header = (m->inbuf[0] << 24) | (m->inbuf[1] << 16) |
+ (m->inbuf[2] << 8) | m->inbuf[3] | 0xfff00000;
+
+ if (ff_mpa_check_header(header) < 0) { // Bad header, discard block
+ *data_size = 0;
+ return buf_size;
+ }
+
+ decode_header(m, header);
+ mp_decode_frame(m, decoded_buf);
+
+ n = MPA_FRAME_SIZE * m->nb_channels;
+ out_size += n * sizeof(OUT_INT);
+ if(s->frames > 1) {
+ /* interleave output data */
+ bp = out_samples + coff[fr];
+ if(m->nb_channels == 1) {
+ for(j = 0; j < n; j++) {
+ *bp = decoded_buf[j];
+ bp += off;
+ }
+ } else {
+ for(j = 0; j < n; j++) {
+ bp[0] = decoded_buf[j++];
+ bp[1] = decoded_buf[j];
+ bp += off;
+ }
+ }
+ }
+ }
+
+ /* update codec info */
+ avctx->sample_rate = s->mp3decctx[0]->sample_rate;
+ avctx->frame_size= buf_size;
+ avctx->bit_rate = 0;
+ for (i = 0; i < s->frames; i++)
+ avctx->bit_rate += s->mp3decctx[i]->bit_rate;
+
+ *data_size = out_size;
+ return buf_size;
+}
+
+
AVCodec mp2_decoder =
{
"mp2",
decode_frame_adu,
CODEC_CAP_PARSE_ONLY,
};
+
+AVCodec mp3on4_decoder =
+{
+ "mp3on4",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_MP3ON4,
+ sizeof(MP3On4DecodeContext),
+ decode_init_mp3on4,
+ NULL,
+ decode_close_mp3on4,
+ decode_frame_mp3on4,
+ 0
+};
projects / ffmpeg / blobdiff