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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2012 Justin Ruggles |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #ifndef AVRESAMPLE_AUDIO_MIX_H |
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| 22 | #define AVRESAMPLE_AUDIO_MIX_H |
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| 23 | |||
| 24 | #include |
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| 25 | |||
| 26 | #include "libavutil/samplefmt.h" |
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| 27 | #include "avresample.h" |
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| 28 | #include "internal.h" |
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| 29 | #include "audio_data.h" |
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| 30 | |||
| 31 | typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch, |
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| 32 | int in_ch); |
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| 33 | |||
| 34 | /** |
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| 35 | * Set mixing function if the parameters match. |
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| 36 | * |
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| 37 | * This compares the parameters of the mixing function to the parameters in the |
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| 38 | * AudioMix context. If the parameters do not match, no changes are made to the |
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| 39 | * active functions. If the parameters do match and the alignment is not |
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| 40 | * constrained, the function is set as the generic mixing function. If the |
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| 41 | * parameters match and the alignment is constrained, the function is set as |
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| 42 | * the optimized mixing function. |
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| 43 | * |
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| 44 | * @param am AudioMix context |
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| 45 | * @param fmt input/output sample format |
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| 46 | * @param coeff_type mixing coefficient type |
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| 47 | * @param in_channels number of input channels, or 0 for any number of channels |
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| 48 | * @param out_channels number of output channels, or 0 for any number of channels |
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| 49 | * @param ptr_align buffer pointer alignment, in bytes |
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| 50 | * @param samples_align buffer size alignment, in samples |
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| 51 | * @param descr function type description (e.g. "C" or "SSE") |
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| 52 | * @param mix_func mixing function pointer |
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| 53 | */ |
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| 54 | void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt, |
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| 55 | enum AVMixCoeffType coeff_type, int in_channels, |
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| 56 | int out_channels, int ptr_align, int samples_align, |
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| 57 | const char *descr, void *mix_func); |
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| 58 | |||
| 59 | /** |
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| 60 | * Allocate and initialize an AudioMix context. |
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| 61 | * |
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| 62 | * The parameters in the AVAudioResampleContext are used to initialize the |
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| 63 | * AudioMix context. |
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| 64 | * |
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| 65 | * @param avr AVAudioResampleContext |
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| 66 | * @return newly-allocated AudioMix context. |
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| 67 | */ |
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| 68 | AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr); |
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| 69 | |||
| 70 | /** |
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| 71 | * Free an AudioMix context. |
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| 72 | */ |
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| 73 | void ff_audio_mix_free(AudioMix **am); |
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| 74 | |||
| 75 | /** |
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| 76 | * Apply channel mixing to audio data using the current mixing matrix. |
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| 77 | */ |
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| 78 | int ff_audio_mix(AudioMix *am, AudioData *src); |
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| 79 | |||
| 80 | /** |
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| 81 | * Get the current mixing matrix. |
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| 82 | */ |
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| 83 | int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride); |
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| 84 | |||
| 85 | /** |
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| 86 | * Set the current mixing matrix. |
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| 87 | */ |
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| 88 | int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride); |
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| 89 | |||
| 90 | /* arch-specific initialization functions */ |
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| 91 | |||
| 92 | void ff_audio_mix_init_x86(AudioMix *am); |
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| 93 | |||
| 94 | #endif /* AVRESAMPLE_AUDIO_MIX_H */ |