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