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// SPDX-License-Identifier: GPL-2.0
//
// mapper.h - an interface of muxer/demuxer between buffer with data frames and
// formatted files.
//
// Copyright (c) 2018 Takashi Sakamoto <o-takashi@sakamocchi.jp>
//
// Licensed under the terms of the GNU General Public License, version 2.
#ifndef __ALSA_UTILS_AXFER_MAPPER__H_
#define __ALSA_UTILS_AXFER_MAPPER__H_
#include "container.h"
enum mapper_type {
MAPPER_TYPE_MUXER = 0,
MAPPER_TYPE_DEMUXER,
MAPPER_TYPE_COUNT,
};
enum mapper_target {
MAPPER_TARGET_SINGLE = 0,
MAPPER_TARGET_MULTIPLE,
MAPPER_TARGET_COUNT,
};
struct mapper_ops;
struct mapper_context {
enum mapper_type type;
enum mapper_target target;
const struct mapper_ops *ops;
unsigned int private_size;
void *private_data;
unsigned int cntr_count;
// A part of parameters of PCM substream.
snd_pcm_access_t access;
unsigned int bytes_per_sample;
unsigned int samples_per_frame;
snd_pcm_uframes_t frames_per_buffer;
unsigned int verbose;
};
int mapper_context_init(struct mapper_context *mapper,
enum mapper_type type, unsigned int cntr_count,
unsigned int verbose);
int mapper_context_pre_process(struct mapper_context *mapper,
snd_pcm_access_t access,
unsigned int bytes_per_sample,
unsigned int samples_per_frame,
unsigned int frames_per_buffer,
struct container_context *cntrs);
int mapper_context_process_frames(struct mapper_context *mapper,
void *frame_buffer,
unsigned int *frame_count,
struct container_context *cntrs);
void mapper_context_post_process(struct mapper_context *mapper);
void mapper_context_destroy(struct mapper_context *mapper);
// For internal use in 'mapper' module.
struct mapper_ops {
int (*pre_process)(struct mapper_context *mapper,
struct container_context *cntrs,
unsigned int cntr_count);
int (*process_frames)(struct mapper_context *mapper,
void *frame_buffer, unsigned int *frame_count,
struct container_context *cntrs,
unsigned int cntr_count);
void (*post_process)(struct mapper_context *mapper);
};
struct mapper_data {
struct mapper_ops ops;
unsigned int private_size;
};
extern const struct mapper_data mapper_muxer_single;
extern const struct mapper_data mapper_demuxer_single;
extern const struct mapper_data mapper_muxer_multiple;
extern const struct mapper_data mapper_demuxer_multiple;
#endif
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