| /* |
| * 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 |
| */ |
| |
| #ifndef AVRESAMPLE_AUDIO_MIX_H |
| #define AVRESAMPLE_AUDIO_MIX_H |
| |
| #include <stdint.h> |
| |
| #include "libavutil/samplefmt.h" |
| #include "avresample.h" |
| #include "internal.h" |
| #include "audio_data.h" |
| |
| typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch, |
| int in_ch); |
| |
| /** |
| * Set mixing function if the parameters match. |
| * |
| * This compares the parameters of the mixing function to the parameters in the |
| * AudioMix context. If the parameters do not match, no changes are made to the |
| * active functions. If the parameters do match and the alignment is not |
| * constrained, the function is set as the generic mixing function. If the |
| * parameters match and the alignment is constrained, the function is set as |
| * the optimized mixing function. |
| * |
| * @param am AudioMix context |
| * @param fmt input/output sample format |
| * @param coeff_type mixing coefficient type |
| * @param in_channels number of input channels, or 0 for any number of channels |
| * @param out_channels number of output channels, or 0 for any number of channels |
| * @param ptr_align buffer pointer alignment, in bytes |
| * @param samples_align buffer size alignment, in samples |
| * @param descr function type description (e.g. "C" or "SSE") |
| * @param mix_func mixing function pointer |
| */ |
| void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt, |
| enum AVMixCoeffType coeff_type, int in_channels, |
| int out_channels, int ptr_align, int samples_align, |
| const char *descr, void *mix_func); |
| |
| /** |
| * Allocate and initialize an AudioMix context. |
| * |
| * The parameters in the AVAudioResampleContext are used to initialize the |
| * AudioMix context. |
| * |
| * @param avr AVAudioResampleContext |
| * @return newly-allocated AudioMix context. |
| */ |
| AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr); |
| |
| /** |
| * Free an AudioMix context. |
| */ |
| void ff_audio_mix_free(AudioMix **am); |
| |
| /** |
| * Apply channel mixing to audio data using the current mixing matrix. |
| */ |
| int ff_audio_mix(AudioMix *am, AudioData *src); |
| |
| /** |
| * Get the current mixing matrix. |
| */ |
| int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride); |
| |
| /** |
| * Set the current mixing matrix. |
| */ |
| int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride); |
| |
| /* arch-specific initialization functions */ |
| |
| void ff_audio_mix_init_x86(AudioMix *am); |
| |
| #endif /* AVRESAMPLE_AUDIO_MIX_H */ |