FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/ac3dsp.c	Lines:	251	260	96.5 %
Date:	2020-07-11 02:49:52	Branches:	92	110	83.6 %


/*
 * AC-3 DSP functions
 * Copyright (c) 2011 Justin Ruggles
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "avcodec.h"
#include "ac3.h"
#include "ac3dsp.h"
#include "mathops.h"

static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
{
    int blk, i;

    if (!num_reuse_blocks)
        return;

    for (i = 0; i < nb_coefs; i++) {
        uint8_t min_exp = *exp;
        uint8_t *exp1 = exp + 256;
        for (blk = 0; blk < num_reuse_blocks; blk++) {
            uint8_t next_exp = *exp1;
            if (next_exp < min_exp)
                min_exp = next_exp;
            exp1 += 256;
        }
        *exp++ = min_exp;
    }
}

static int ac3_max_msb_abs_int16_c(const int16_t *src, int len)
{
    int i, v = 0;
    for (i = 0; i < len; i++)
        v |= abs(src[i]);
    return v;
}

static void ac3_lshift_int16_c(int16_t *src, unsigned int len,
                               unsigned int shift)
{
    uint32_t *src32 = (uint32_t *)src;
    const uint32_t mask = ~(((1 << shift) - 1) << 16);
    int i;
    len >>= 1;
    for (i = 0; i < len; i += 8) {
        src32[i  ] = (src32[i  ] << shift) & mask;
        src32[i+1] = (src32[i+1] << shift) & mask;
        src32[i+2] = (src32[i+2] << shift) & mask;
        src32[i+3] = (src32[i+3] << shift) & mask;
        src32[i+4] = (src32[i+4] << shift) & mask;
        src32[i+5] = (src32[i+5] << shift) & mask;
        src32[i+6] = (src32[i+6] << shift) & mask;
        src32[i+7] = (src32[i+7] << shift) & mask;
    }
}

static void ac3_rshift_int32_c(int32_t *src, unsigned int len,
                               unsigned int shift)
{
    do {
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        *src++ >>= shift;
        len -= 8;
    } while (len > 0);
}

static void float_to_fixed24_c(int32_t *dst, const float *src, unsigned int len)
{
    const float scale = 1 << 24;
    do {
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        *dst++ = lrintf(*src++ * scale);
        len -= 8;
    } while (len > 0);
}

static void ac3_bit_alloc_calc_bap_c(int16_t *mask, int16_t *psd,
                                     int start, int end,
                                     int snr_offset, int floor,
                                     const uint8_t *bap_tab, uint8_t *bap)
{
    int bin, band, band_end;

    /* special case, if snr offset is -960, set all bap's to zero */
    if (snr_offset == -960) {
        memset(bap, 0, AC3_MAX_COEFS);
        return;
    }

    bin  = start;
    band = ff_ac3_bin_to_band_tab[start];
    do {
        int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
        band_end = ff_ac3_band_start_tab[++band];
        band_end = FFMIN(band_end, end);

        for (; bin < band_end; bin++) {
            int address = av_clip_uintp2((psd[bin] - m) >> 5, 6);
            bap[bin] = bap_tab[address];
        }
    } while (end > band_end);
}

static void ac3_update_bap_counts_c(uint16_t mant_cnt[16], uint8_t *bap,
                                    int len)
{
    while (len-- > 0)
        mant_cnt[bap[len]]++;
}

DECLARE_ALIGNED(16, const uint16_t, ff_ac3_bap_bits)[16] = {
    0,  0,  0,  3,  0,  4,  5,  6,  7,  8,  9, 10, 11, 12, 14, 16
};

static int ac3_compute_mantissa_size_c(uint16_t mant_cnt[6][16])
{
    int blk, bap;
    int bits = 0;

    for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
        // bap=1 : 3 mantissas in 5 bits
        bits += (mant_cnt[blk][1] / 3) * 5;
        // bap=2 : 3 mantissas in 7 bits
        // bap=4 : 2 mantissas in 7 bits
        bits += ((mant_cnt[blk][2] / 3) + (mant_cnt[blk][4] >> 1)) * 7;
        // bap=3 : 1 mantissa in 3 bits
        bits += mant_cnt[blk][3] * 3;
        // bap=5 to 15 : get bits per mantissa from table
        for (bap = 5; bap < 16; bap++)
            bits += mant_cnt[blk][bap] * ff_ac3_bap_bits[bap];
    }
    return bits;
}

static void ac3_extract_exponents_c(uint8_t *exp, int32_t *coef, int nb_coefs)
{
    int i;

    for (i = 0; i < nb_coefs; i++) {
        int v = abs(coef[i]);
        exp[i] = v ? 23 - av_log2(v) : 24;
    }
}

static void ac3_sum_square_butterfly_int32_c(int64_t sum[4],
                                             const int32_t *coef0,
                                             const int32_t *coef1,
                                             int len)
{
    int i;

    sum[0] = sum[1] = sum[2] = sum[3] = 0;

    for (i = 0; i < len; i++) {
        int lt = coef0[i];
        int rt = coef1[i];
        int md = lt + rt;
        int sd = lt - rt;
        MAC64(sum[0], lt, lt);
        MAC64(sum[1], rt, rt);
        MAC64(sum[2], md, md);
        MAC64(sum[3], sd, sd);
    }
}

static void ac3_sum_square_butterfly_float_c(float sum[4],
                                             const float *coef0,
                                             const float *coef1,
                                             int len)
{
    int i;

    sum[0] = sum[1] = sum[2] = sum[3] = 0;

    for (i = 0; i < len; i++) {
        float lt = coef0[i];
        float rt = coef1[i];
        float md = lt + rt;
        float sd = lt - rt;
        sum[0] += lt * lt;
        sum[1] += rt * rt;
        sum[2] += md * md;
        sum[3] += sd * sd;
    }
}

static void ac3_downmix_5_to_2_symmetric_c(float **samples, float **matrix,
                                           int len)
{
    int i;
    float v0, v1;
    float front_mix    = matrix[0][0];
    float center_mix   = matrix[0][1];
    float surround_mix = matrix[0][3];

    for (i = 0; i < len; i++) {
        v0 = samples[0][i] * front_mix  +
             samples[1][i] * center_mix +
             samples[3][i] * surround_mix;

        v1 = samples[1][i] * center_mix +
             samples[2][i] * front_mix  +
             samples[4][i] * surround_mix;

        samples[0][i] = v0;
        samples[1][i] = v1;
    }
}

static void ac3_downmix_5_to_1_symmetric_c(float **samples, float **matrix,
                                           int len)
{
    int i;
    float front_mix    = matrix[0][0];
    float center_mix   = matrix[0][1];
    float surround_mix = matrix[0][3];

    for (i = 0; i < len; i++) {
        samples[0][i] = samples[0][i] * front_mix    +
                        samples[1][i] * center_mix   +
                        samples[2][i] * front_mix    +
                        samples[3][i] * surround_mix +
                        samples[4][i] * surround_mix;
    }
}

static void ac3_downmix_c(float **samples, float **matrix,
                          int out_ch, int in_ch, int len)
{
    int i, j;
    float v0, v1;

    if (out_ch == 2) {
        for (i = 0; i < len; i++) {
            v0 = v1 = 0.0f;
            for (j = 0; j < in_ch; j++) {
                v0 += samples[j][i] * matrix[0][j];
                v1 += samples[j][i] * matrix[1][j];
            }
            samples[0][i] = v0;
            samples[1][i] = v1;
        }
    } else if (out_ch == 1) {
        for (i = 0; i < len; i++) {
            v0 = 0.0f;
            for (j = 0; j < in_ch; j++)
                v0 += samples[j][i] * matrix[0][j];
            samples[0][i] = v0;
        }
    }
}

static void ac3_downmix_5_to_2_symmetric_c_fixed(int32_t **samples, int16_t **matrix,
                                           int len)
{
    int i;
    int64_t v0, v1;
    int16_t front_mix    = matrix[0][0];
    int16_t center_mix   = matrix[0][1];
    int16_t surround_mix = matrix[0][3];

    for (i = 0; i < len; i++) {
        v0 = (int64_t)samples[0][i] * front_mix  +
             (int64_t)samples[1][i] * center_mix +
             (int64_t)samples[3][i] * surround_mix;

        v1 = (int64_t)samples[1][i] * center_mix +
             (int64_t)samples[2][i] * front_mix  +
             (int64_t)samples[4][i] * surround_mix;

        samples[0][i] = (v0+2048)>>12;
        samples[1][i] = (v1+2048)>>12;
    }
}

static void ac3_downmix_5_to_1_symmetric_c_fixed(int32_t **samples, int16_t **matrix,
                                                 int len)
{
    int i;
    int64_t v0;
    int16_t front_mix    = matrix[0][0];
    int16_t center_mix   = matrix[0][1];
    int16_t surround_mix = matrix[0][3];

    for (i = 0; i < len; i++) {
        v0 = (int64_t)samples[0][i] * front_mix    +
             (int64_t)samples[1][i] * center_mix   +
             (int64_t)samples[2][i] * front_mix    +
             (int64_t)samples[3][i] * surround_mix +
             (int64_t)samples[4][i] * surround_mix;

        samples[0][i] = (v0+2048)>>12;
    }
}

static void ac3_downmix_c_fixed(int32_t **samples, int16_t **matrix,
                                int out_ch, int in_ch, int len)
{
    int i, j;
    int64_t v0, v1;
    if (out_ch == 2) {
        for (i = 0; i < len; i++) {
            v0 = v1 = 0;
            for (j = 0; j < in_ch; j++) {
                v0 += (int64_t)samples[j][i] * matrix[0][j];
                v1 += (int64_t)samples[j][i] * matrix[1][j];
            }
            samples[0][i] = (v0+2048)>>12;
            samples[1][i] = (v1+2048)>>12;
        }
    } else if (out_ch == 1) {
        for (i = 0; i < len; i++) {
            v0 = 0;
            for (j = 0; j < in_ch; j++)
                v0 += (int64_t)samples[j][i] * matrix[0][j];
            samples[0][i] = (v0+2048)>>12;
        }
    }
}

void ff_ac3dsp_downmix_fixed(AC3DSPContext *c, int32_t **samples, int16_t **matrix,
                             int out_ch, int in_ch, int len)
{
    if (c->in_channels != in_ch || c->out_channels != out_ch) {
        c->in_channels  = in_ch;
        c->out_channels = out_ch;
        c->downmix_fixed = NULL;

        if (in_ch == 5 && out_ch == 2 &&
            !(matrix[1][0] | matrix[0][2]  |
              matrix[1][3] | matrix[0][4]  |
             (matrix[0][1] ^ matrix[1][1]) |
             (matrix[0][0] ^ matrix[1][2]))) {
            c->downmix_fixed = ac3_downmix_5_to_2_symmetric_c_fixed;
        } else if (in_ch == 5 && out_ch == 1 &&
                   matrix[0][0] == matrix[0][2] &&
                   matrix[0][3] == matrix[0][4]) {
            c->downmix_fixed = ac3_downmix_5_to_1_symmetric_c_fixed;
        }
    }

    if (c->downmix_fixed)
        c->downmix_fixed(samples, matrix, len);
    else
        ac3_downmix_c_fixed(samples, matrix, out_ch, in_ch, len);
}

static void apply_window_int16_c(int16_t *output, const int16_t *input,
                                 const int16_t *window, unsigned int len)
{
    int i;
    int len2 = len >> 1;

    for (i = 0; i < len2; i++) {
        int16_t w       = window[i];
        output[i]       = (MUL16(input[i],       w) + (1 << 14)) >> 15;
        output[len-i-1] = (MUL16(input[len-i-1], w) + (1 << 14)) >> 15;
    }
}

void ff_ac3dsp_downmix(AC3DSPContext *c, float **samples, float **matrix,
                       int out_ch, int in_ch, int len)
{
    if (c->in_channels != in_ch || c->out_channels != out_ch) {
        int **matrix_cmp = (int **)matrix;

        c->in_channels  = in_ch;
        c->out_channels = out_ch;
        c->downmix      = NULL;

        if (in_ch == 5 && out_ch == 2 &&
            !(matrix_cmp[1][0] | matrix_cmp[0][2]   |
              matrix_cmp[1][3] | matrix_cmp[0][4]   |
             (matrix_cmp[0][1] ^ matrix_cmp[1][1]) |
             (matrix_cmp[0][0] ^ matrix_cmp[1][2]))) {
            c->downmix = ac3_downmix_5_to_2_symmetric_c;
        } else if (in_ch == 5 && out_ch == 1 &&
                   matrix_cmp[0][0] == matrix_cmp[0][2] &&
                   matrix_cmp[0][3] == matrix_cmp[0][4]) {
            c->downmix = ac3_downmix_5_to_1_symmetric_c;
        }

        if (ARCH_X86)
            ff_ac3dsp_set_downmix_x86(c);
    }

    if (c->downmix)
        c->downmix(samples, matrix, len);
    else
        ac3_downmix_c(samples, matrix, out_ch, in_ch, len);
}

av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
{
    c->ac3_exponent_min = ac3_exponent_min_c;
    c->ac3_max_msb_abs_int16 = ac3_max_msb_abs_int16_c;
    c->ac3_lshift_int16 = ac3_lshift_int16_c;
    c->ac3_rshift_int32 = ac3_rshift_int32_c;
    c->float_to_fixed24 = float_to_fixed24_c;
    c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_c;
    c->update_bap_counts = ac3_update_bap_counts_c;
    c->compute_mantissa_size = ac3_compute_mantissa_size_c;
    c->extract_exponents = ac3_extract_exponents_c;
    c->sum_square_butterfly_int32 = ac3_sum_square_butterfly_int32_c;
    c->sum_square_butterfly_float = ac3_sum_square_butterfly_float_c;
    c->in_channels           = 0;
    c->out_channels          = 0;
    c->downmix               = NULL;
    c->downmix_fixed         = NULL;
    c->apply_window_int16 = apply_window_int16_c;

    if (ARCH_ARM)
        ff_ac3dsp_init_arm(c, bit_exact);
    if (ARCH_X86)
        ff_ac3dsp_init_x86(c, bit_exact);
    if (ARCH_MIPS)
        ff_ac3dsp_init_mips(c, bit_exact);
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* AC-3 DSP functions
3			* Copyright (c) 2011 Justin Ruggles
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "avcodec.h"
23			#include "ac3.h"
24			#include "ac3dsp.h"
25			#include "mathops.h"
26
27		6386	static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
28			{
29			int blk, i;
30
31	✓✓	6386	if (!num_reuse_blocks)
32		3991	return;
33
34	✓✓	615515	for (i = 0; i < nb_coefs; i++) {
35		613120	uint8_t min_exp = *exp;
36		613120	uint8_t *exp1 = exp + 256;
37	✓✓	2872064	for (blk = 0; blk < num_reuse_blocks; blk++) {
38		2258944	uint8_t next_exp = *exp1;
39	✓✓	2258944	if (next_exp < min_exp)
40		349729	min_exp = next_exp;
41		2258944	exp1 += 256;
42			}
43		613120	*exp++ = min_exp;
44			}
45			}
46
47		4344	static int ac3_max_msb_abs_int16_c(const int16_t *src, int len)
48			{
49		4344	int i, v = 0;
50	✓✓	2228472	for (i = 0; i < len; i++)
51		2224128	v \|= abs(src[i]);
52		4344	return v;
53			}
54
55		3996	static void ac3_lshift_int16_c(int16_t *src, unsigned int len,
56			unsigned int shift)
57			{
58		3996	uint32_t src32 = (uint32_t )src;
59		3996	const uint32_t mask = ~(((1 << shift) - 1) << 16);
60			int i;
61		3996	len >>= 1;
62	✓✓	131868	for (i = 0; i < len; i += 8) {
63		127872	src32[i ] = (src32[i ] << shift) & mask;
64		127872	src32[i+1] = (src32[i+1] << shift) & mask;
65		127872	src32[i+2] = (src32[i+2] << shift) & mask;
66		127872	src32[i+3] = (src32[i+3] << shift) & mask;
67		127872	src32[i+4] = (src32[i+4] << shift) & mask;
68		127872	src32[i+5] = (src32[i+5] << shift) & mask;
69		127872	src32[i+6] = (src32[i+6] << shift) & mask;
70		127872	src32[i+7] = (src32[i+7] << shift) & mask;
71			}
72		3996	}
73
74		139008	static void ac3_rshift_int32_c(int32_t *src, unsigned int len,
75			unsigned int shift)
76			{
77			do {
78		139008	*src++ >>= shift;
79		139008	*src++ >>= shift;
80		139008	*src++ >>= shift;
81		139008	*src++ >>= shift;
82		139008	*src++ >>= shift;
83		139008	*src++ >>= shift;
84		139008	*src++ >>= shift;
85		139008	*src++ >>= shift;
86		139008	len -= 8;
87	✓✓	139008	} while (len > 0);
88		4344	}
89
90		3822	static void float_to_fixed24_c(int32_t dst, const float src, unsigned int len)
91			{
92		3822	const float scale = 1 << 24;
93			do {
94		327600	dst++ = lrintf(src++ * scale);
95		327600	dst++ = lrintf(src++ * scale);
96		327600	dst++ = lrintf(src++ * scale);
97		327600	dst++ = lrintf(src++ * scale);
98		327600	dst++ = lrintf(src++ * scale);
99		327600	dst++ = lrintf(src++ * scale);
100		327600	dst++ = lrintf(src++ * scale);
101		327600	dst++ = lrintf(src++ * scale);
102		327600	len -= 8;
103	✓✓	327600	} while (len > 0);
104		3822	}
105
106		67825	static void ac3_bit_alloc_calc_bap_c(int16_t mask, int16_t psd,
107			int start, int end,
108			int snr_offset, int floor,
109			const uint8_t bap_tab, uint8_t bap)
110			{
111			int bin, band, band_end;
112
113			/* special case, if snr offset is -960, set all bap's to zero */
114	✗✓	67825	if (snr_offset == -960) {
115			memset(bap, 0, AC3_MAX_COEFS);
116			return;
117			}
118
119		67825	bin = start;
120		67825	band = ff_ac3_bin_to_band_tab[start];
121			do {
122		2244943	int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
123		2244943	band_end = ff_ac3_band_start_tab[++band];
124		2244943	band_end = FFMIN(band_end, end);
125
126	✓✓	10954702	for (; bin < band_end; bin++) {
127		8709759	int address = av_clip_uintp2((psd[bin] - m) >> 5, 6);
128		8709759	bap[bin] = bap_tab[address];
129			}
130	✓✓	2244943	} while (end > band_end);
131			}
132
133		127680	static void ac3_update_bap_counts_c(uint16_t mant_cnt[16], uint8_t *bap,
134			int len)
135			{
136	✓✓	13918836	while (len-- > 0)
137		13791156	mant_cnt[bap[len]]++;
138		127680	}
139
140			DECLARE_ALIGNED(16, const uint16_t, ff_ac3_bap_bits)[16] = {
141			0, 0, 0, 3, 0, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16
142			};
143
144		9340	static int ac3_compute_mantissa_size_c(uint16_t mant_cnt[6][16])
145			{
146			int blk, bap;
147		9340	int bits = 0;
148
149	✓✓	65380	for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
150			// bap=1 : 3 mantissas in 5 bits
151		56040	bits += (mant_cnt[blk][1] / 3) * 5;
152			// bap=2 : 3 mantissas in 7 bits
153			// bap=4 : 2 mantissas in 7 bits
154		56040	bits += ((mant_cnt[blk][2] / 3) + (mant_cnt[blk][4] >> 1)) * 7;
155			// bap=3 : 1 mantissa in 3 bits
156		56040	bits += mant_cnt[blk][3] * 3;
157			// bap=5 to 15 : get bits per mantissa from table
158	✓✓	672480	for (bap = 5; bap < 16; bap++)
159		616440	bits += mant_cnt[blk][bap] * ff_ac3_bap_bits[bap];
160			}
161		9340	return bits;
162			}
163
164		5411	static void ac3_extract_exponents_c(uint8_t exp, int32_t coef, int nb_coefs)
165			{
166			int i;
167
168	✓✓	4037219	for (i = 0; i < nb_coefs; i++) {
169		4031808	int v = abs(coef[i]);
170	✓✓	4031808	exp[i] = v ? 23 - av_log2(v) : 24;
171			}
172		5411	}
173
174		4152	static void ac3_sum_square_butterfly_int32_c(int64_t sum[4],
175			const int32_t *coef0,
176			const int32_t *coef1,
177			int len)
178			{
179			int i;
180
181		4152	sum[0] = sum[1] = sum[2] = sum[3] = 0;
182
183	✓✓	91344	for (i = 0; i < len; i++) {
184		87192	int lt = coef0[i];
185		87192	int rt = coef1[i];
186		87192	int md = lt + rt;
187		87192	int sd = lt - rt;
188		87192	MAC64(sum[0], lt, lt);
189		87192	MAC64(sum[1], rt, rt);
190		87192	MAC64(sum[2], md, md);
191		87192	MAC64(sum[3], sd, sd);
192			}
193		4152	}
194
195		13104	static void ac3_sum_square_butterfly_float_c(float sum[4],
196			const float *coef0,
197			const float *coef1,
198			int len)
199			{
200			int i;
201
202		13104	sum[0] = sum[1] = sum[2] = sum[3] = 0;
203
204	✓✓	288288	for (i = 0; i < len; i++) {
205		275184	float lt = coef0[i];
206		275184	float rt = coef1[i];
207		275184	float md = lt + rt;
208		275184	float sd = lt - rt;
209		275184	sum[0] += lt * lt;
210		275184	sum[1] += rt * rt;
211		275184	sum[2] += md * md;
212		275184	sum[3] += sd * sd;
213			}
214		13104	}
215
216		330	static void ac3_downmix_5_to_2_symmetric_c(float samples, float matrix,
217			int len)
218			{
219			int i;
220			float v0, v1;
221		330	float front_mix = matrix[0][0];
222		330	float center_mix = matrix[0][1];
223		330	float surround_mix = matrix[0][3];
224
225	✓✓	84810	for (i = 0; i < len; i++) {
226		84480	v0 = samples[0][i] * front_mix +
227		84480	samples[1][i] * center_mix +
228		84480	samples[3][i] * surround_mix;
229
230		84480	v1 = samples[1][i] * center_mix +
231		84480	samples[2][i] * front_mix +
232		84480	samples[4][i] * surround_mix;
233
234		84480	samples[0][i] = v0;
235		84480	samples[1][i] = v1;
236			}
237		330	}
238
239		330	static void ac3_downmix_5_to_1_symmetric_c(float samples, float matrix,
240			int len)
241			{
242			int i;
243		330	float front_mix = matrix[0][0];
244		330	float center_mix = matrix[0][1];
245		330	float surround_mix = matrix[0][3];
246
247	✓✓	84810	for (i = 0; i < len; i++) {
248		84480	samples[0][i] = samples[0][i] * front_mix +
249		84480	samples[1][i] * center_mix +
250		84480	samples[2][i] * front_mix +
251		84480	samples[3][i] * surround_mix +
252		84480	samples[4][i] * surround_mix;
253			}
254		330	}
255
256		746	static void ac3_downmix_c(float samples, float matrix,
257			int out_ch, int in_ch, int len)
258			{
259			int i, j;
260			float v0, v1;
261
262	✓✓	746	if (out_ch == 2) {
263	✓✓	95733	for (i = 0; i < len; i++) {
264		95360	v0 = v1 = 0.0f;
265	✓✓	476800	for (j = 0; j < in_ch; j++) {
266		381440	v0 += samples[j][i] * matrix[0][j];
267		381440	v1 += samples[j][i] * matrix[1][j];
268			}
269		95360	samples[0][i] = v0;
270		95360	samples[1][i] = v1;
271			}
272	✓✗	373	} else if (out_ch == 1) {
273	✓✓	95733	for (i = 0; i < len; i++) {
274		95360	v0 = 0.0f;
275	✓✓	476800	for (j = 0; j < in_ch; j++)
276		381440	v0 += samples[j][i] * matrix[0][j];
277		95360	samples[0][i] = v0;
278			}
279			}
280		746	}
281
282		330	static void ac3_downmix_5_to_2_symmetric_c_fixed(int32_t samples, int16_t matrix,
283			int len)
284			{
285			int i;
286			int64_t v0, v1;
287		330	int16_t front_mix = matrix[0][0];
288		330	int16_t center_mix = matrix[0][1];
289		330	int16_t surround_mix = matrix[0][3];
290
291	✓✓	84810	for (i = 0; i < len; i++) {
292		84480	v0 = (int64_t)samples[0][i] * front_mix +
293		84480	(int64_t)samples[1][i] * center_mix +
294		84480	(int64_t)samples[3][i] * surround_mix;
295
296		84480	v1 = (int64_t)samples[1][i] * center_mix +
297		84480	(int64_t)samples[2][i] * front_mix +
298		84480	(int64_t)samples[4][i] * surround_mix;
299
300		84480	samples[0][i] = (v0+2048)>>12;
301		84480	samples[1][i] = (v1+2048)>>12;
302			}
303		330	}
304
305		330	static void ac3_downmix_5_to_1_symmetric_c_fixed(int32_t samples, int16_t matrix,
306			int len)
307			{
308			int i;
309			int64_t v0;
310		330	int16_t front_mix = matrix[0][0];
311		330	int16_t center_mix = matrix[0][1];
312		330	int16_t surround_mix = matrix[0][3];
313
314	✓✓	84810	for (i = 0; i < len; i++) {
315		84480	v0 = (int64_t)samples[0][i] * front_mix +
316		84480	(int64_t)samples[1][i] * center_mix +
317		84480	(int64_t)samples[2][i] * front_mix +
318		84480	(int64_t)samples[3][i] * surround_mix +
319		84480	(int64_t)samples[4][i] * surround_mix;
320
321		84480	samples[0][i] = (v0+2048)>>12;
322			}
323		330	}
324
325		372	static void ac3_downmix_c_fixed(int32_t samples, int16_t matrix,
326			int out_ch, int in_ch, int len)
327			{
328			int i, j;
329			int64_t v0, v1;
330	✗✓	372	if (out_ch == 2) {
331			for (i = 0; i < len; i++) {
332			v0 = v1 = 0;
333			for (j = 0; j < in_ch; j++) {
334			v0 += (int64_t)samples[j][i] * matrix[0][j];
335			v1 += (int64_t)samples[j][i] * matrix[1][j];
336			}
337			samples[0][i] = (v0+2048)>>12;
338			samples[1][i] = (v1+2048)>>12;
339			}
340	✓✗	372	} else if (out_ch == 1) {
341	✓✓	95476	for (i = 0; i < len; i++) {
342		95104	v0 = 0;
343	✓✓	475520	for (j = 0; j < in_ch; j++)
344		380416	v0 += (int64_t)samples[j][i] * matrix[0][j];
345		95104	samples[0][i] = (v0+2048)>>12;
346			}
347			}
348		372	}
349
350		1032	void ff_ac3dsp_downmix_fixed(AC3DSPContext c, int32_t samples, int16_t *matrix,
351			int out_ch, int in_ch, int len)
352			{
353	✓✓✗✓	1032	if (c->in_channels != in_ch \|\| c->out_channels != out_ch) {
354		3	c->in_channels = in_ch;
355		3	c->out_channels = out_ch;
356		3	c->downmix_fixed = NULL;
357
358	✓✓✓✓	3	if (in_ch == 5 && out_ch == 2 &&
359		1	!(matrix[1][0] \| matrix[0][2] \|
360		1	matrix[1][3] \| matrix[0][4] \|
361		1	(matrix[0][1] ^ matrix[1][1]) \|
362	✓✗	1	(matrix[0][0] ^ matrix[1][2]))) {
363		1	c->downmix_fixed = ac3_downmix_5_to_2_symmetric_c_fixed;
364	✓✓✓✗	2	} else if (in_ch == 5 && out_ch == 1 &&
365	✓✗	1	matrix[0][0] == matrix[0][2] &&
366	✓✗	1	matrix[0][3] == matrix[0][4]) {
367		1	c->downmix_fixed = ac3_downmix_5_to_1_symmetric_c_fixed;
368			}
369			}
370
371	✓✓	1032	if (c->downmix_fixed)
372		660	c->downmix_fixed(samples, matrix, len);
373			else
374		372	ac3_downmix_c_fixed(samples, matrix, out_ch, in_ch, len);
375		1032	}
376
377		4344	static void apply_window_int16_c(int16_t output, const int16_t input,
378			const int16_t *window, unsigned int len)
379			{
380			int i;
381		4344	int len2 = len >> 1;
382
383	✓✓	1116408	for (i = 0; i < len2; i++) {
384		1112064	int16_t w = window[i];
385		1112064	output[i] = (MUL16(input[i], w) + (1 << 14)) >> 15;
386		1112064	output[len-i-1] = (MUL16(input[len-i-1], w) + (1 << 14)) >> 15;
387			}
388		4344	}
389
390		1406	void ff_ac3dsp_downmix(AC3DSPContext c, float samples, float *matrix,
391			int out_ch, int in_ch, int len)
392			{
393	✓✓✗✓	1406	if (c->in_channels != in_ch \|\| c->out_channels != out_ch) {
394		4	int matrix_cmp = (int )matrix;
395
396		4	c->in_channels = in_ch;
397		4	c->out_channels = out_ch;
398		4	c->downmix = NULL;
399
400	✓✓✓✓	4	if (in_ch == 5 && out_ch == 2 &&
401		1	!(matrix_cmp[1][0] \| matrix_cmp[0][2] \|
402		1	matrix_cmp[1][3] \| matrix_cmp[0][4] \|
403		1	(matrix_cmp[0][1] ^ matrix_cmp[1][1]) \|
404	✓✗	1	(matrix_cmp[0][0] ^ matrix_cmp[1][2]))) {
405		1	c->downmix = ac3_downmix_5_to_2_symmetric_c;
406	✓✓✓✗	3	} else if (in_ch == 5 && out_ch == 1 &&
407	✓✗	1	matrix_cmp[0][0] == matrix_cmp[0][2] &&
408	✓✗	1	matrix_cmp[0][3] == matrix_cmp[0][4]) {
409		1	c->downmix = ac3_downmix_5_to_1_symmetric_c;
410			}
411
412			if (ARCH_X86)
413		4	ff_ac3dsp_set_downmix_x86(c);
414			}
415
416	✓✓	1406	if (c->downmix)
417		660	c->downmix(samples, matrix, len);
418			else
419		746	ac3_downmix_c(samples, matrix, out_ch, in_ch, len);
420		1406	}
421
422		61	av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
423			{
424		61	c->ac3_exponent_min = ac3_exponent_min_c;
425		61	c->ac3_max_msb_abs_int16 = ac3_max_msb_abs_int16_c;
426		61	c->ac3_lshift_int16 = ac3_lshift_int16_c;
427		61	c->ac3_rshift_int32 = ac3_rshift_int32_c;
428		61	c->float_to_fixed24 = float_to_fixed24_c;
429		61	c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_c;
430		61	c->update_bap_counts = ac3_update_bap_counts_c;
431		61	c->compute_mantissa_size = ac3_compute_mantissa_size_c;
432		61	c->extract_exponents = ac3_extract_exponents_c;
433		61	c->sum_square_butterfly_int32 = ac3_sum_square_butterfly_int32_c;
434		61	c->sum_square_butterfly_float = ac3_sum_square_butterfly_float_c;
435		61	c->in_channels = 0;
436		61	c->out_channels = 0;
437		61	c->downmix = NULL;
438		61	c->downmix_fixed = NULL;
439		61	c->apply_window_int16 = apply_window_int16_c;
440
441			if (ARCH_ARM)
442			ff_ac3dsp_init_arm(c, bit_exact);
443			if (ARCH_X86)
444		61	ff_ac3dsp_init_x86(c, bit_exact);
445			if (ARCH_MIPS)
446			ff_ac3dsp_init_mips(c, bit_exact);
447		61	}