repositories / deb_ffmpeg.git / blame
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| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> | |
| 3 | * | |
| 4 | * This file is part of FFmpeg. | |
| 5 | * | |
| 6 | * FFmpeg is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * FFmpeg is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with FFmpeg; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #ifndef AVRESAMPLE_AUDIO_MIX_H | |
| 22 | #define AVRESAMPLE_AUDIO_MIX_H | |
| 23 | ||
| 24 | #include <stdint.h> | |
| 25 | ||
| 26 | #include "libavutil/samplefmt.h" | |
| 27 | #include "avresample.h" | |
| 28 | #include "internal.h" | |
| 29 | #include "audio_data.h" | |
| 30 | ||
| 31 | typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch, | |
| 32 | int in_ch); | |
| 33 | ||
| 34 | /** | |
| 35 | * Set mixing function if the parameters match. | |
| 36 | * | |
| 37 | * This compares the parameters of the mixing function to the parameters in the | |
| 38 | * AudioMix context. If the parameters do not match, no changes are made to the | |
| 39 | * active functions. If the parameters do match and the alignment is not | |
| 40 | * constrained, the function is set as the generic mixing function. If the | |
| 41 | * parameters match and the alignment is constrained, the function is set as | |
| 42 | * the optimized mixing function. | |
| 43 | * | |
| 44 | * @param am AudioMix context | |
| 45 | * @param fmt input/output sample format | |
| 46 | * @param coeff_type mixing coefficient type | |
| 47 | * @param in_channels number of input channels, or 0 for any number of channels | |
| 48 | * @param out_channels number of output channels, or 0 for any number of channels | |
| 49 | * @param ptr_align buffer pointer alignment, in bytes | |
| 50 | * @param samples_align buffer size alignment, in samples | |
| 51 | * @param descr function type description (e.g. "C" or "SSE") | |
| 52 | * @param mix_func mixing function pointer | |
| 53 | */ | |
| 54 | void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt, | |
| 55 | enum AVMixCoeffType coeff_type, int in_channels, | |
| 56 | int out_channels, int ptr_align, int samples_align, | |
| 57 | const char *descr, void *mix_func); | |
| 58 | ||
| 59 | /** | |
| 60 | * Allocate and initialize an AudioMix context. | |
| 61 | * | |
| 62 | * The parameters in the AVAudioResampleContext are used to initialize the | |
| 63 | * AudioMix context. | |
| 64 | * | |
| 65 | * @param avr AVAudioResampleContext | |
| 66 | * @return newly-allocated AudioMix context. | |
| 67 | */ | |
| 68 | AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr); | |
| 69 | ||
| 70 | /** | |
| 71 | * Free an AudioMix context. | |
| 72 | */ | |
| 73 | void ff_audio_mix_free(AudioMix **am); | |
| 74 | ||
| 75 | /** | |
| 76 | * Apply channel mixing to audio data using the current mixing matrix. | |
| 77 | */ | |
| 78 | int ff_audio_mix(AudioMix *am, AudioData *src); | |
| 79 | ||
| 80 | /** | |
| 81 | * Get the current mixing matrix. | |
| 82 | */ | |
| 83 | int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride); | |
| 84 | ||
| 85 | /** | |
| 86 | * Set the current mixing matrix. | |
| 87 | */ | |
| 88 | int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride); | |
| 89 | ||
| 90 | /* arch-specific initialization functions */ | |
| 91 | ||
| 92 | void ff_audio_mix_init_x86(AudioMix *am); | |
| 93 | ||
| 94 | #endif /* AVRESAMPLE_AUDIO_MIX_H */ |