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// SPDX-License-Identifier: GPL-2.0
//
// container.h - an interface of parser/builder for 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_CONTAINER__H_
#define __ALSA_UTILS_AXFER_CONTAINER__H_
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <stdbool.h>
#include <stdint.h>
#include <alsa/asoundlib.h>
enum container_type {
CONTAINER_TYPE_PARSER = 0,
CONTAINER_TYPE_BUILDER,
CONTAINER_TYPE_COUNT,
};
enum container_format {
CONTAINER_FORMAT_RIFF_WAVE = 0,
CONTAINER_FORMAT_AU,
CONTAINER_FORMAT_VOC,
CONTAINER_FORMAT_RAW,
CONTAINER_FORMAT_COUNT,
};
struct container_ops;
struct container_context {
enum container_type type;
int fd;
int (*process_bytes)(struct container_context *cntr,
void *buffer, unsigned int byte_count);
bool magic_handled;
bool eof;
bool interrupted;
bool stdio;
enum container_format format;
uint64_t max_size;
char magic[4];
const struct container_ops *ops;
void *private_data;
// Available after pre-process.
unsigned int bytes_per_sample;
unsigned int samples_per_frame;
unsigned int frames_per_second;
unsigned int verbose;
uint64_t handled_byte_count;
};
const char *const container_suffix_from_format(enum container_format format);
enum container_format container_format_from_path(const char *path);
int container_parser_init(struct container_context *cntr, int fd,
unsigned int verbose);
int container_builder_init(struct container_context *cntr, int fd,
enum container_format format, unsigned int verbose);
void container_context_destroy(struct container_context *cntr);
int container_context_pre_process(struct container_context *cntr,
snd_pcm_format_t *format,
unsigned int *samples_per_frame,
unsigned int *frames_per_second,
uint64_t *frame_count);
int container_context_process_frames(struct container_context *cntr,
void *frame_buffer,
unsigned int *frame_count);
int container_context_post_process(struct container_context *cntr,
uint64_t *frame_count);
// For internal use in 'container' module.
struct container_ops {
int (*pre_process)(struct container_context *cntr,
snd_pcm_format_t *format,
unsigned int *samples_per_frame,
unsigned int *frames_per_second,
uint64_t *byte_count);
int (*post_process)(struct container_context *cntr,
uint64_t handled_byte_count);
};
struct container_parser {
enum container_format format;
const char *const magic;
uint64_t max_size;
struct container_ops ops;
unsigned int private_size;
};
struct container_builder {
enum container_format format;
const char *const suffix;
uint64_t max_size;
struct container_ops ops;
unsigned int private_size;
};
int container_recursive_read(struct container_context *cntr, void *buf,
unsigned int byte_count);
int container_recursive_write(struct container_context *cntr, void *buf,
unsigned int byte_count);
int container_seek_offset(struct container_context *cntr, off64_t offset);
extern const struct container_parser container_parser_riff_wave;
extern const struct container_builder container_builder_riff_wave;
extern const struct container_parser container_parser_au;
extern const struct container_builder container_builder_au;
extern const struct container_parser container_parser_voc;
extern const struct container_builder container_builder_voc;
extern const struct container_parser container_parser_raw;
extern const struct container_builder container_builder_raw;
#endif
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