| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2012 | ||
| 3 | * MIPS Technologies, Inc., California. | ||
| 4 | * | ||
| 5 | * Redistribution and use in source and binary forms, with or without | ||
| 6 | * modification, are permitted provided that the following conditions | ||
| 7 | * are met: | ||
| 8 | * 1. Redistributions of source code must retain the above copyright | ||
| 9 | * notice, this list of conditions and the following disclaimer. | ||
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | ||
| 11 | * notice, this list of conditions and the following disclaimer in the | ||
| 12 | * documentation and/or other materials provided with the distribution. | ||
| 13 | * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its | ||
| 14 | * contributors may be used to endorse or promote products derived from | ||
| 15 | * this software without specific prior written permission. | ||
| 16 | * | ||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND | ||
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE | ||
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
| 27 | * SUCH DAMAGE. | ||
| 28 | * | ||
| 29 | * Author: Stanislav Ocovaj (socovaj@mips.com) | ||
| 30 | * | ||
| 31 | * AC3 fixed-point decoder for MIPS platforms | ||
| 32 | * | ||
| 33 | * This file is part of FFmpeg. | ||
| 34 | * | ||
| 35 | * FFmpeg is free software; you can redistribute it and/or | ||
| 36 | * modify it under the terms of the GNU Lesser General Public | ||
| 37 | * License as published by the Free Software Foundation; either | ||
| 38 | * version 2.1 of the License, or (at your option) any later version. | ||
| 39 | * | ||
| 40 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 41 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 43 | * Lesser General Public License for more details. | ||
| 44 | * | ||
| 45 | * You should have received a copy of the GNU Lesser General Public | ||
| 46 | * License along with FFmpeg; if not, write to the Free Software | ||
| 47 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 48 | */ | ||
| 49 | |||
| 50 | #define USE_FIXED 1 | ||
| 51 | #include "ac3dec.h" | ||
| 52 | #include "codec_internal.h" | ||
| 53 | #define IMDCT_TYPE AV_TX_INT32_MDCT | ||
| 54 | |||
| 55 | #include "ac3dec.h" | ||
| 56 | |||
| 57 | static const int end_freq_inv_tab[8] = | ||
| 58 | { | ||
| 59 | 50529027, 44278013, 39403370, 32292987, 27356480, 23729101, 20951060, 18755316 | ||
| 60 | }; | ||
| 61 | |||
| 62 | 7008 | static void scale_coefs ( | |
| 63 | int32_t *dst, | ||
| 64 | const int32_t *src, | ||
| 65 | int dynrng, | ||
| 66 | int len) | ||
| 67 | { | ||
| 68 | int i, shift; | ||
| 69 | unsigned mul, round; | ||
| 70 | int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7; | ||
| 71 | |||
| 72 | 7008 | mul = (dynrng & 0x1f) + 0x20; | |
| 73 | 7008 | shift = 4 - (sign_extend(dynrng, 9) >> 5); | |
| 74 |
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7008 | if (shift > 0 ) { |
| 75 | 7008 | round = 1 << (shift-1); | |
| 76 |
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231264 | for (i=0; i<len; i+=8) { |
| 77 | |||
| 78 | 224256 | temp = src[i] * mul; | |
| 79 | 224256 | temp1 = src[i+1] * mul; | |
| 80 | 224256 | temp = temp + round; | |
| 81 | 224256 | temp2 = src[i+2] * mul; | |
| 82 | |||
| 83 | 224256 | temp1 = temp1 + round; | |
| 84 | 224256 | dst[i] = temp >> shift; | |
| 85 | 224256 | temp3 = src[i+3] * mul; | |
| 86 | 224256 | temp2 = temp2 + round; | |
| 87 | |||
| 88 | 224256 | dst[i+1] = temp1 >> shift; | |
| 89 | 224256 | temp4 = src[i + 4] * mul; | |
| 90 | 224256 | temp3 = temp3 + round; | |
| 91 | 224256 | dst[i+2] = temp2 >> shift; | |
| 92 | |||
| 93 | 224256 | temp5 = src[i+5] * mul; | |
| 94 | 224256 | temp4 = temp4 + round; | |
| 95 | 224256 | dst[i+3] = temp3 >> shift; | |
| 96 | 224256 | temp6 = src[i+6] * mul; | |
| 97 | |||
| 98 | 224256 | dst[i+4] = temp4 >> shift; | |
| 99 | 224256 | temp5 = temp5 + round; | |
| 100 | 224256 | temp7 = src[i+7] * mul; | |
| 101 | 224256 | temp6 = temp6 + round; | |
| 102 | |||
| 103 | 224256 | dst[i+5] = temp5 >> shift; | |
| 104 | 224256 | temp7 = temp7 + round; | |
| 105 | 224256 | dst[i+6] = temp6 >> shift; | |
| 106 | 224256 | dst[i+7] = temp7 >> shift; | |
| 107 | |||
| 108 | } | ||
| 109 | } else { | ||
| 110 | ✗ | shift = -shift; | |
| 111 | ✗ | mul <<= shift; | |
| 112 | ✗ | for (i=0; i<len; i+=8) { | |
| 113 | |||
| 114 | ✗ | dst[i] = src[i ] * mul; | |
| 115 | ✗ | dst[i+1] = src[i+1] * mul; | |
| 116 | ✗ | dst[i+2] = src[i+2] * mul; | |
| 117 | ✗ | dst[i+3] = src[i+3] * mul; | |
| 118 | ✗ | dst[i+4] = src[i+4] * mul; | |
| 119 | ✗ | dst[i+5] = src[i+5] * mul; | |
| 120 | ✗ | dst[i+6] = src[i+6] * mul; | |
| 121 | ✗ | dst[i+7] = src[i+7] * mul; | |
| 122 | } | ||
| 123 | } | ||
| 124 | 7008 | } | |
| 125 | |||
| 126 | /** | ||
| 127 | * Downmix samples from original signal to stereo or mono (this is for 16-bit samples | ||
| 128 | * and fixed point decoder - original (for 32-bit samples) is in ac3dsp.c). | ||
| 129 | */ | ||
| 130 | 1 | static void ac3_downmix_c_fixed16(int16_t **samples, int16_t **matrix, | |
| 131 | int out_ch, int in_ch, int len) | ||
| 132 | { | ||
| 133 | int i, j; | ||
| 134 | int v0, v1; | ||
| 135 |
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1 | if (out_ch == 2) { |
| 136 | ✗ | for (i = 0; i < len; i++) { | |
| 137 | ✗ | v0 = v1 = 0; | |
| 138 | ✗ | for (j = 0; j < in_ch; j++) { | |
| 139 | ✗ | v0 += samples[j][i] * matrix[0][j]; | |
| 140 | ✗ | v1 += samples[j][i] * matrix[1][j]; | |
| 141 | } | ||
| 142 | ✗ | samples[0][i] = (v0+2048)>>12; | |
| 143 | ✗ | samples[1][i] = (v1+2048)>>12; | |
| 144 | } | ||
| 145 |
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1 | } else if (out_ch == 1) { |
| 146 |
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257 | for (i = 0; i < len; i++) { |
| 147 | 256 | v0 = 0; | |
| 148 |
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1280 | for (j = 0; j < in_ch; j++) |
| 149 | 1024 | v0 += samples[j][i] * matrix[0][j]; | |
| 150 | 256 | samples[0][i] = (v0+2048)>>12; | |
| 151 | } | ||
| 152 | } | ||
| 153 | 1 | } | |
| 154 | |||
| 155 | #include "eac3dec.c" | ||
| 156 | #include "ac3dec.c" | ||
| 157 | |||
| 158 | static const AVOption options[] = { | ||
| 159 | { "cons_noisegen", "enable consistent noise generation", OFFSET(consistent_noise_generation), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR }, | ||
| 160 | { "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), AV_OPT_TYPE_FLOAT, {.dbl = 1.0}, 0.0, 6.0, PAR }, | ||
| 161 | { "heavy_compr", "enable heavy dynamic range compression", OFFSET(heavy_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR }, | ||
| 162 | { "downmix", "Request a specific channel layout from the decoder", OFFSET(downmix_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, .flags = PAR }, | ||
| 163 | { NULL}, | ||
| 164 | }; | ||
| 165 | |||
| 166 | static const AVClass ac3_decoder_class = { | ||
| 167 | .class_name = "Fixed-Point AC-3 Decoder", | ||
| 168 | .item_name = av_default_item_name, | ||
| 169 | .option = options, | ||
| 170 | .version = LIBAVUTIL_VERSION_INT, | ||
| 171 | }; | ||
| 172 | |||
| 173 | const FFCodec ff_ac3_fixed_decoder = { | ||
| 174 | .p.name = "ac3_fixed", | ||
| 175 | CODEC_LONG_NAME("ATSC A/52A (AC-3)"), | ||
| 176 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 177 | .p.id = AV_CODEC_ID_AC3, | ||
| 178 | .p.priv_class = &ac3_decoder_class, | ||
| 179 | .priv_data_size = sizeof (AC3DecodeContext), | ||
| 180 | .init = ac3_decode_init, | ||
| 181 | .close = ac3_decode_end, | ||
| 182 | FF_CODEC_DECODE_CB(ac3_decode_frame), | ||
| 183 | .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF | | ||
| 184 | AV_CODEC_CAP_DR1, | ||
| 185 | .p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, | ||
| 186 | AV_SAMPLE_FMT_NONE }, | ||
| 187 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 188 | }; | ||
| 189 |