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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 6 нояб. 2018 г.
*
* lsp-runtime-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-runtime-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_FMT_LSPC_AUDIOWRITER_H_
#define LSP_PLUG_IN_FMT_LSPC_AUDIOWRITER_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/runtime/LSPString.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/fmt/lspc/File.h>
#include <lsp-plug.in/io/Path.h>
#include <lsp-plug.in/fmt/lspc/lspc.h>
namespace lsp
{
namespace lspc
{
/**
* This is helper class for writing audio content to LSPC files.
*/
class AudioWriter
{
private:
AudioWriter & operator = (const AudioWriter &);
private:
enum flags_t
{
F_OPENED = 1 << 0,
F_CLOSE_WRITER = 1 << 1,
F_CLOSE_FILE = 1 << 2,
F_REV_BYTES = 1 << 3,
F_DROP_WRITER = 1 << 4,
F_INTEGER_SAMPLE = 1 << 5,
F_DROP_FILE = 1 << 6
};
typedef void (* encode_func_t)(void *dst, const float *src, size_t ns);
protected:
audio_parameters_t sParams;
File *pFD;
ChunkWriter *pWD;
size_t nFlags;
size_t nBPS; // Bytes per sample
size_t nFrameChannels; // Size of frame in channels
encode_func_t pEncode;
float *pBuffer;
uint8_t *pFBuffer; // frame buffer
protected:
static void encode_u8(void *vp, const float *src, size_t ns);
static void encode_s8(void *vp, const float *src, size_t ns);
static void encode_u16(void *vp, const float *src, size_t ns);
static void encode_s16(void *vp, const float *src, size_t ns);
static void encode_u24le(void *vp, const float *src, size_t ns);
static void encode_u24be(void *vp, const float *src, size_t ns);
static void encode_s24le(void *vp, const float *src, size_t ns);
static void encode_s24be(void *vp, const float *src, size_t ns);
static void encode_u32(void *vp, const float *src, size_t ns);
static void encode_s32(void *vp, const float *src, size_t ns);
static void encode_f32(void *vp, const float *src, size_t ns);
static void encode_f64(void *vp, const float *src, size_t ns);
protected:
status_t parse_parameters(const audio_parameters_t *p);
status_t free_resources();
status_t write_header(ChunkWriter *wr);
public:
explicit AudioWriter();
~AudioWriter();
public:
/**
* Create new LSPC file and open for writing, write header to LSPC file
* @param path UTF-8 path to the LSPC file
* @param params audio parameters
* @return status of operation
*/
status_t create(const char *path, const audio_parameters_t *params);
/**
* Create new LSPC file and open for writing, write header to LSPC file
* @param path path to the LSPC file
* @param params audio parameters
* @return status of operation
*/
status_t create(const LSPString *path, const audio_parameters_t *params);
/**
* Create new LSPC file and open for writing, write header to LSPC file
* @param path path to the LSPC file
* @param params audio parameters
* @return status of operation
*/
status_t create(const io::Path *path, const audio_parameters_t *params);
/**
* Create chunk in LSPC file with magic=LSPC_CHUNK_AUDIO and write header
* @param lspc LSPC file
* @param params audio stream parameters
* @param auto_close automatically close file on close()
* @return status of operation
*/
status_t open(File *lspc, const audio_parameters_t *params, bool auto_close = false);
/**
* Create chunk in LSPC file with magic=LSPC_CHUNK_AUDIO, do not write header
* @param lspc LSPC file
* @param params audio stream parameters
* @param auto_close automatically close file on close()
* @return status of operation
*/
status_t open_raw(File *lspc, const audio_parameters_t *params, bool auto_close = false);
/**
* Create chunk in LSPC file with specified magic and write header
* @param lspc LSPC file
* @param magic specified chunk magic
* @param params audio stream parameters
* @param auto_close automatically close file on close()
* @return status of operation
*/
status_t open(File *lspc, uint32_t magic, const audio_parameters_t *params, bool auto_close = false);
/**
* Create chunk in LSPC file with specified magic, do not write header
* @param lspc LSPC file
* @param magic specified chunk magic
* @param params audio stream parameters
* @param auto_close automatically close file on close()
* @return status of operation
*/
status_t open_raw(File *lspc, uint32_t magic, const audio_parameters_t *params, bool auto_close = false);
/**
* Write header to already opened chunk
* @param wr chunk writer
* @param params audio stream parameters
* @param auto_close automatically close chunk writer on close()
* @return status of operation
*/
status_t open(ChunkWriter *wr, const audio_parameters_t *params, bool auto_close = false);
/**
* Open chunk writer as a raw data stream. Does not emit audio header into stream contents.
* @param wr chunk writer
* @param params audio stream parameters
* @param auto_close automatically close chunk writer on close()
* @return status of operation
*/
status_t open_raw(ChunkWriter *wr, const audio_parameters_t *params, bool auto_close = false);
/**
* Close audio writer
* @return status of operation
*/
status_t close();
/**
* Write sample data to chunk
*
* @param data array of pointers to store data, must match number of channels in the stream
* @param frames number of frames to write
* @return status of operation
*/
status_t write_samples(const float **data, size_t frames);
/**
* Write frames to chunk
* @param data buffer to store data
* @param frames number of frames to write
* @return status of operation
*/
status_t write_frames(const float *data, size_t frames);
/**
* Obtain current audio parameters of the stream
* @param dst pointer to store audio parameters
* @return status of operation
*/
status_t get_parameters(audio_parameters_t *dst) const;
/**
* Get current chunk identifier
* @return current chunk identifier
*/
uint32_t unique_id() const;
/**
* Get current chunk magic
* @return current chunk magic
*/
uint32_t magic() const;
};
}
} /* namespace lsp */
#endif /* LSP_PLUG_IN_FMT_LSPC_AUDIOWRITER_H_ */
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