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92 lines
3.1 KiB
92 lines
3.1 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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// This is a C library for reading and writing PCM .wav files. It is
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// influenced by other libraries such as libsndfile and audiofile, except is
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// much smaller and has an Apache 2.0 license.
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// The API should be familiar to clients of similar libraries, but there is
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// no guarantee that it will stay exactly source-code compatible with other libraries.
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#if CC_PLATFORM == CC_PLATFORM_ANDROID
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#include <sys/cdefs.h>
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#elif CC_PLATFORM == CC_PLATFORM_WINDOWS
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#include <sys/types.h>
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#elif CC_PLATFORM == CC_PLATFORM_OPENHARMONY
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#include <cstdint>
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#endif
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#include <cstdint>
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#include <cstdio>
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namespace sf {
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// visible to clients
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using sf_count_t = int;
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struct SF_INFO {
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sf_count_t frames;
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int samplerate;
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int channels;
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int format;
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};
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// opaque to clients
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using SNDFILE = struct SNDFILE_;
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// Format
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#define SF_FORMAT_TYPEMASK 1
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#define SF_FORMAT_WAV 1
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#define SF_FORMAT_SUBMASK 14
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#define SF_FORMAT_PCM_16 2
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#define SF_FORMAT_PCM_U8 4
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#define SF_FORMAT_FLOAT 6
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#define SF_FORMAT_PCM_32 8
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#define SF_FORMAT_PCM_24 10
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struct snd_callbacks {
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void *(*open)(const char *path, void *user);
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size_t (*read)(void *ptr, size_t size, size_t nmemb, void *datasource);
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int (*seek)(void *datasource, long offset, int whence); //NOLINT(google-runtime-int)
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int (*close)(void *datasource);
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long (*tell)(void *datasource); //NOLINT(google-runtime-int)
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};
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// Open stream
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SNDFILE *sf_open_read(const char *path, SF_INFO *info, snd_callbacks *cb, void *user); //NOLINT(readability-identifier-naming)
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// Close stream
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void sf_close(SNDFILE *handle); //NOLINT(readability-identifier-naming)
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// Read interleaved frames and return actual number of frames read
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sf_count_t sf_readf_short(SNDFILE *handle, int16_t *ptr, sf_count_t desired); //NOLINT(readability-identifier-naming)
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/*
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sf_count_t sf_readf_float(SNDFILE *handle, float *ptr, sf_count_t desired);
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sf_count_t sf_readf_int(SNDFILE *handle, int *ptr, sf_count_t desired);
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*/
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off_t sf_seek(SNDFILE *handle, int offset, int whence); //NOLINT(readability-identifier-naming)
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off_t sf_tell(SNDFILE *handle); //NOLINT(readability-identifier-naming)
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static int sInited = 0;
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static void sf_lazy_init(); //NOLINT(readability-identifier-naming)
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struct SNDFILE_ {
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uint8_t *temp; // realloc buffer used for shrinking 16 bits to 8 bits and byte-swapping
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void *stream;
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size_t bytesPerFrame;
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size_t remaining; // frames unread for SFM_READ, frames written for SFM_WRITE
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SF_INFO info;
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snd_callbacks callback;
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};
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} // namespace sf
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