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95 lines
3.2 KiB
95 lines
3.2 KiB
/* |
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* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVRESAMPLE_AUDIO_MIX_H |
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#define AVRESAMPLE_AUDIO_MIX_H |
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#include <stdint.h> |
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#include "libavutil/samplefmt.h" |
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#include "avresample.h" |
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#include "audio_data.h" |
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typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch, |
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int in_ch); |
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typedef struct AudioMix AudioMix; |
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/** |
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* Set mixing function if the parameters match. |
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* |
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* This compares the parameters of the mixing function to the parameters in the |
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* AudioMix context. If the parameters do not match, no changes are made to the |
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* active functions. If the parameters do match and the alignment is not |
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* constrained, the function is set as the generic mixing function. If the |
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* parameters match and the alignment is constrained, the function is set as |
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* the optimized mixing function. |
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* |
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* @param am AudioMix context |
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* @param fmt input/output sample format |
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* @param coeff_type mixing coefficient type |
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* @param in_channels number of input channels, or 0 for any number of channels |
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* @param out_channels number of output channels, or 0 for any number of channels |
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* @param ptr_align buffer pointer alignment, in bytes |
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* @param samples_align buffer size alignment, in samples |
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* @param descr function type description (e.g. "C" or "SSE") |
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* @param mix_func mixing function pointer |
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*/ |
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void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt, |
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enum AVMixCoeffType coeff_type, int in_channels, |
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int out_channels, int ptr_align, int samples_align, |
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const char *descr, void *mix_func); |
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/** |
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* Allocate and initialize an AudioMix context. |
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* |
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* The parameters in the AVAudioResampleContext are used to initialize the |
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* AudioMix context. |
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* |
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* @param avr AVAudioResampleContext |
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* @return newly-allocated AudioMix context. |
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*/ |
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AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr); |
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/** |
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* Free an AudioMix context. |
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*/ |
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void ff_audio_mix_free(AudioMix **am); |
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/** |
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* Apply channel mixing to audio data using the current mixing matrix. |
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*/ |
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int ff_audio_mix(AudioMix *am, AudioData *src); |
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/** |
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* Get the current mixing matrix. |
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*/ |
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int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride); |
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/** |
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* Set the current mixing matrix. |
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*/ |
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int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride); |
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/* arch-specific initialization functions */ |
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void ff_audio_mix_init_x86(AudioMix *am); |
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#endif /* AVRESAMPLE_AUDIO_MIX_H */
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