diff options
Diffstat (limited to 'libavresample/audio_mix_matrix.c')
| -rw-r--r-- | libavresample/audio_mix_matrix.c | 294 |
1 files changed, 0 insertions, 294 deletions
diff --git a/libavresample/audio_mix_matrix.c b/libavresample/audio_mix_matrix.c deleted file mode 100644 index 5d92351a0e..0000000000 --- a/libavresample/audio_mix_matrix.c +++ /dev/null @@ -1,294 +0,0 @@ -/* - * Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at) - * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> - * - * 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 <stdint.h> - -#include "libavutil/common.h" -#include "libavutil/libm.h" -#include "libavutil/samplefmt.h" -#include "avresample.h" -#include "internal.h" -#include "audio_data.h" -#include "audio_mix.h" - -/* channel positions */ -#define FRONT_LEFT 0 -#define FRONT_RIGHT 1 -#define FRONT_CENTER 2 -#define LOW_FREQUENCY 3 -#define BACK_LEFT 4 -#define BACK_RIGHT 5 -#define FRONT_LEFT_OF_CENTER 6 -#define FRONT_RIGHT_OF_CENTER 7 -#define BACK_CENTER 8 -#define SIDE_LEFT 9 -#define SIDE_RIGHT 10 -#define TOP_CENTER 11 -#define TOP_FRONT_LEFT 12 -#define TOP_FRONT_CENTER 13 -#define TOP_FRONT_RIGHT 14 -#define TOP_BACK_LEFT 15 -#define TOP_BACK_CENTER 16 -#define TOP_BACK_RIGHT 17 -#define STEREO_LEFT 29 -#define STEREO_RIGHT 30 -#define WIDE_LEFT 31 -#define WIDE_RIGHT 32 -#define SURROUND_DIRECT_LEFT 33 -#define SURROUND_DIRECT_RIGHT 34 -#define LOW_FREQUENCY_2 35 - -#define SQRT3_2 1.22474487139158904909 /* sqrt(3/2) */ - -static av_always_inline int even(uint64_t layout) -{ - return (!layout || !!(layout & (layout - 1))); -} - -static int sane_layout(uint64_t layout) -{ - /* check that there is at least 1 front speaker */ - if (!(layout & AV_CH_LAYOUT_SURROUND)) - return 0; - - /* check for left/right symmetry */ - if (!even(layout & (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)) || - !even(layout & (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)) || - !even(layout & (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)) || - !even(layout & (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)) || - !even(layout & (AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT)) || - !even(layout & (AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT)) || - !even(layout & (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)) || - !even(layout & (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)) || - !even(layout & (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT))) - return 0; - - return 1; -} - -int avresample_build_matrix(uint64_t in_layout, uint64_t out_layout, - double center_mix_level, double surround_mix_level, - double lfe_mix_level, int normalize, - double *matrix_out, int stride, - enum AVMatrixEncoding matrix_encoding) -{ - int i, j, out_i, out_j; - double matrix[64][64] = {{0}}; - int64_t unaccounted; - double maxcoef = 0; - int in_channels, out_channels; - - if ((out_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == AV_CH_LAYOUT_STEREO_DOWNMIX) { - out_layout = AV_CH_LAYOUT_STEREO; - } - - unaccounted = in_layout & ~out_layout; - - in_channels = av_get_channel_layout_nb_channels( in_layout); - out_channels = av_get_channel_layout_nb_channels(out_layout); - - memset(matrix_out, 0, out_channels * stride * sizeof(*matrix_out)); - - /* check if layouts are supported */ - if (!in_layout || in_channels > AVRESAMPLE_MAX_CHANNELS) - return AVERROR(EINVAL); - if (!out_layout || out_channels > AVRESAMPLE_MAX_CHANNELS) - return AVERROR(EINVAL); - - /* check if layouts are unbalanced or abnormal */ - if (!sane_layout(in_layout) || !sane_layout(out_layout)) - return AVERROR_PATCHWELCOME; - - /* route matching input/output channels */ - for (i = 0; i < 64; i++) { - if (in_layout & out_layout & (1ULL << i)) - matrix[i][i] = 1.0; - } - - /* mix front center to front left/right */ - if (unaccounted & AV_CH_FRONT_CENTER) { - if ((out_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO) { - if ((in_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO) { - matrix[FRONT_LEFT ][FRONT_CENTER] += center_mix_level; - matrix[FRONT_RIGHT][FRONT_CENTER] += center_mix_level; - } else { - matrix[FRONT_LEFT ][FRONT_CENTER] += M_SQRT1_2; - matrix[FRONT_RIGHT][FRONT_CENTER] += M_SQRT1_2; - } - } else - return AVERROR_PATCHWELCOME; - } - /* mix front left/right to center */ - if (unaccounted & AV_CH_LAYOUT_STEREO) { - if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][FRONT_LEFT ] += M_SQRT1_2; - matrix[FRONT_CENTER][FRONT_RIGHT] += M_SQRT1_2; - /* mix left/right/center to center */ - if (in_layout & AV_CH_FRONT_CENTER) - matrix[FRONT_CENTER][FRONT_CENTER] = center_mix_level * M_SQRT2; - } else - return AVERROR_PATCHWELCOME; - } - /* mix back center to back, side, or front */ - if (unaccounted & AV_CH_BACK_CENTER) { - if (out_layout & AV_CH_BACK_LEFT) { - matrix[BACK_LEFT ][BACK_CENTER] += M_SQRT1_2; - matrix[BACK_RIGHT][BACK_CENTER] += M_SQRT1_2; - } else if (out_layout & AV_CH_SIDE_LEFT) { - matrix[SIDE_LEFT ][BACK_CENTER] += M_SQRT1_2; - matrix[SIDE_RIGHT][BACK_CENTER] += M_SQRT1_2; - } else if (out_layout & AV_CH_FRONT_LEFT) { - if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY || - matrix_encoding == AV_MATRIX_ENCODING_DPLII) { - if (unaccounted & (AV_CH_BACK_LEFT | AV_CH_SIDE_LEFT)) { - matrix[FRONT_LEFT ][BACK_CENTER] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level * M_SQRT1_2; - } else { - matrix[FRONT_LEFT ][BACK_CENTER] -= surround_mix_level; - matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level; - } - } else { - matrix[FRONT_LEFT ][BACK_CENTER] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level * M_SQRT1_2; - } - } else if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][BACK_CENTER] += surround_mix_level * M_SQRT1_2; - } else - return AVERROR_PATCHWELCOME; - } - /* mix back left/right to back center, side, or front */ - if (unaccounted & AV_CH_BACK_LEFT) { - if (out_layout & AV_CH_BACK_CENTER) { - matrix[BACK_CENTER][BACK_LEFT ] += M_SQRT1_2; - matrix[BACK_CENTER][BACK_RIGHT] += M_SQRT1_2; - } else if (out_layout & AV_CH_SIDE_LEFT) { - /* if side channels do not exist in the input, just copy back - channels to side channels, otherwise mix back into side */ - if (in_layout & AV_CH_SIDE_LEFT) { - matrix[SIDE_LEFT ][BACK_LEFT ] += M_SQRT1_2; - matrix[SIDE_RIGHT][BACK_RIGHT] += M_SQRT1_2; - } else { - matrix[SIDE_LEFT ][BACK_LEFT ] += 1.0; - matrix[SIDE_RIGHT][BACK_RIGHT] += 1.0; - } - } else if (out_layout & AV_CH_FRONT_LEFT) { - if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) { - matrix[FRONT_LEFT ][BACK_LEFT ] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_LEFT ][BACK_RIGHT] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level * M_SQRT1_2; - } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) { - matrix[FRONT_LEFT ][BACK_LEFT ] -= surround_mix_level * SQRT3_2; - matrix[FRONT_LEFT ][BACK_RIGHT] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level * SQRT3_2; - } else { - matrix[FRONT_LEFT ][BACK_LEFT ] += surround_mix_level; - matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level; - } - } else if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][BACK_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_CENTER][BACK_RIGHT] += surround_mix_level * M_SQRT1_2; - } else - return AVERROR_PATCHWELCOME; - } - /* mix side left/right into back or front */ - if (unaccounted & AV_CH_SIDE_LEFT) { - if (out_layout & AV_CH_BACK_LEFT) { - /* if back channels do not exist in the input, just copy side - channels to back channels, otherwise mix side into back */ - if (in_layout & AV_CH_BACK_LEFT) { - matrix[BACK_LEFT ][SIDE_LEFT ] += M_SQRT1_2; - matrix[BACK_RIGHT][SIDE_RIGHT] += M_SQRT1_2; - } else { - matrix[BACK_LEFT ][SIDE_LEFT ] += 1.0; - matrix[BACK_RIGHT][SIDE_RIGHT] += 1.0; - } - } else if (out_layout & AV_CH_BACK_CENTER) { - matrix[BACK_CENTER][SIDE_LEFT ] += M_SQRT1_2; - matrix[BACK_CENTER][SIDE_RIGHT] += M_SQRT1_2; - } else if (out_layout & AV_CH_FRONT_LEFT) { - if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) { - matrix[FRONT_LEFT ][SIDE_LEFT ] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_LEFT ][SIDE_RIGHT] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level * M_SQRT1_2; - } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) { - matrix[FRONT_LEFT ][SIDE_LEFT ] -= surround_mix_level * SQRT3_2; - matrix[FRONT_LEFT ][SIDE_RIGHT] -= surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level * SQRT3_2; - } else { - matrix[FRONT_LEFT ][SIDE_LEFT ] += surround_mix_level; - matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level; - } - } else if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2; - matrix[FRONT_CENTER][SIDE_RIGHT] += surround_mix_level * M_SQRT1_2; - } else - return AVERROR_PATCHWELCOME; - } - /* mix left-of-center/right-of-center into front left/right or center */ - if (unaccounted & AV_CH_FRONT_LEFT_OF_CENTER) { - if (out_layout & AV_CH_FRONT_LEFT) { - matrix[FRONT_LEFT ][FRONT_LEFT_OF_CENTER ] += 1.0; - matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER] += 1.0; - } else if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][FRONT_LEFT_OF_CENTER ] += M_SQRT1_2; - matrix[FRONT_CENTER][FRONT_RIGHT_OF_CENTER] += M_SQRT1_2; - } else - return AVERROR_PATCHWELCOME; - } - /* mix LFE into front left/right or center */ - if (unaccounted & AV_CH_LOW_FREQUENCY) { - if (out_layout & AV_CH_FRONT_CENTER) { - matrix[FRONT_CENTER][LOW_FREQUENCY] += lfe_mix_level; - } else if (out_layout & AV_CH_FRONT_LEFT) { - matrix[FRONT_LEFT ][LOW_FREQUENCY] += lfe_mix_level * M_SQRT1_2; - matrix[FRONT_RIGHT][LOW_FREQUENCY] += lfe_mix_level * M_SQRT1_2; - } else - return AVERROR_PATCHWELCOME; - } - - /* transfer internal matrix to output matrix and calculate maximum - per-channel coefficient sum */ - for (out_i = i = 0; out_i < out_channels && i < 64; i++) { - double sum = 0; - for (out_j = j = 0; out_j < in_channels && j < 64; j++) { - matrix_out[out_i * stride + out_j] = matrix[i][j]; - sum += fabs(matrix[i][j]); - if (in_layout & (1ULL << j)) - out_j++; - } - maxcoef = FFMAX(maxcoef, sum); - if (out_layout & (1ULL << i)) - out_i++; - } - - /* normalize */ - if (normalize && maxcoef > 1.0) { - for (i = 0; i < out_channels; i++) - for (j = 0; j < in_channels; j++) - matrix_out[i * stride + j] /= maxcoef; - } - - return 0; -} |