Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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 */
  95.