include/xas/mixer.h


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#ifndef _XAS_MIXER_H
#define _XAS_MIXER_H

#include <sys/types.h>

#include <xas/audio.h>

typedef struct _xas_mixer_input {
    xas_audio_stream *stream;

    float gain,
          bias_l,
          bias_r;

    struct _xas_mixer_input *next;
} xas_mixer_input;

typedef struct _xas_mixer {
    xas_mixer_input *inputs,
                      *last;

    xas_audio_stream *output;

    void *buf;
    size_t buffer_size;
} xas_mixer;

xas_mixer *xas_mixer_new(size_t channels,
                             size_t sample_size,
                             size_t sample_rate,
                             size_t buffer_size);

void xas_mixer_destroy(xas_mixer *mixer);

xas_audio_stream *xas_mixer_output(xas_mixer *mixer);

xas_mixer_input *xas_mixer_input_add(xas_mixer *mixer,
                                         xas_audio_stream *stream,
                                         float gain,
                                         float pan);

void xas_mixer_input_set_gain(xas_mixer_input *input, float gain);

void xas_mixer_input_set_pan(xas_mixer_input *input, float pan);

#endif /* _XAS_MIXER_H */