158 lines
6.3 KiB
C
158 lines
6.3 KiB
C
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/*
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* ttalib.h
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*
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* Description: TTAv1 player library prototypes
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* Developed by: Alexander Djourik <ald@true-audio.com>
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* Pavel Zhilin <pzh@true-audio.com>
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*
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* Copyright (c) 2004 True Audio Software. All rights reserved.
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*
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*/
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/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the True Audio Software nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TTALIB_H_
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#define TTALIB_H_
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#define MAX_BPS 24 /* Max supported Bit resolution */
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#define MAX_NCH 2 /* Max supported number of channels (Rockbox changes: 8 -> 2) */
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#ifndef MAXLINE
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#define MAX_LINE 1024
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#endif
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/* decoded pcm sample depth (sample 28bit + sign 1bit) */
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#define TTA_OUTPUT_DEPTH 29
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/* return codes */
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#define NO_ERROR 0 /* No errors found */
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#define OPEN_ERROR 1 /* Can't open file */
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#define FORMAT_ERROR 2 /* Unknown TTA format version */
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#define PLAYER_ERROR 3 /* Not supported file format */
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#define FILE_ERROR 4 /* File is corrupted */
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#define READ_ERROR 5 /* Can't read from file */
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#define MEMORY_ERROR 6 /* Insufficient memory available */
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/* Rockbox speciffic: does not use FRAME_TIME */
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/* #define FRAME_TIME 1.04489795918367346939 */
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#define MULTIPLY_FRAME_TIME(x) (256 * (x) / 245) /* = FRAME_TIME * x */
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#define SEEK_STEP (int)MULTIPLY_FRAME_TIME(1000) /* (FRAME_TIME * 1000) */
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#define ISO_BUFFER_LENGTH (1024*32)
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#define ISO_NBUFFERS (8)
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#define ISO_BUFFERS_SIZE (4096) /* (ISO_BUFFER_LENGTH*ISO_NBUFFERS) */
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#define PCM_BUFFER_LENGTH (4608)
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#define MAX_SEEK_TABLE_SIZE (4096)
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typedef struct {
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/* FILE *HANDLE; // file handle (Rockbox does not use) */
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unsigned int FILESIZE; /* compressed size */
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unsigned short NCH; /* number of channels */
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unsigned short BPS; /* bits per sample */
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unsigned short BSIZE; /* byte size */
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unsigned short FORMAT; /* audio format */
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unsigned int SAMPLERATE; /* samplerate (sps) */
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unsigned int DATALENGTH; /* data length in samples */
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unsigned int FRAMELEN; /* frame length */
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unsigned int LENGTH; /* playback time (sec) */
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unsigned int STATE; /* return code */
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unsigned int DATAPOS; /* size of ID3v2 header */
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unsigned int BITRATE; /* average bitrate (kbps) */
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/* double COMPRESS; // compression ratio (Rockbox does not use) */
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/* id3_info ID3; // ID3 information (Rockbox does not use) */
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} tta_info;
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enum tta_seek_type
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{
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TTA_SEEK_TIME,
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TTA_SEEK_POS,
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};
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/*********************** Library functions *************************/
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/* Rockbox speciffic: open_tta_file() does not use */
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/* Rockbox speciffic: It is used in place of open_tta_file(). */
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int set_tta_info( // FUNCTION: set tta file info structure
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tta_info *info); // file info structure
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/*
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* RETURN VALUE
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* This function returns 0 if success. Otherwise, -1 is returned
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* and the variable STATE of the currently using info structure
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* is set to indicate the error.
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*
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*/
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/* Rockbox speciffic: close_tta_file() does not use */
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/* Rockbox speciffic: set_position() change arguments and return value. */
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/*
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* FUNCTION: sets playback position
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* pos: seek position
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* seek_time_ms / SEEK_STEP (when type is TTA_SEEK_TIME)
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* file position (when type is TTA_SEEK_POS)
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*/
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int set_position (
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unsigned int pos,
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enum tta_seek_type type);
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/*
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* RETURN VALUE
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* This function returns the seeked data position (>= 0) if success. Otherwise, -1 is returned
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* and the variable STATE of the currently using info structure
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* is set to indicate the error.
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*
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*/
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int player_init ( // FUNCTION: initializes TTA player
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tta_info *info); // file info structure
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/*
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* RETURN VALUE
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* This function returns 0 if success. Otherwise, -1 is returned
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* and the variable STATE of the currently using info structure
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* is set to indicate the error.
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*
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*/
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void player_stop (void); // FUNCTION: destroys memory pools
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/* Rockbox speciffic: unsigned char -> int32_t */
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int get_samples ( // FUNCTION: decode PCM_BUFFER_LENGTH samples
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int32_t *buffer); // into the current PCM buffer position
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/*
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* RETURN VALUE
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* This function returns the number of samples successfully decoded.
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* Otherwise, -1 is returned and the variable STATE of the currently
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* using info structure is set to indicate the error.
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*
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*/
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const char *get_error_str (int error); // FUNCTION: get error description
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#endif /* TTALIB_H_ */
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