0f5c6d47d4
decoding speed iPod video ~153% But in some players, the decoding speed is not enough. (e.g., H180 52.4% (thanks amiconn), H300 55.09% (thanks n1s)) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25994 a1c6a512-1295-4272-9138-f99709370657
157 lines
6.3 KiB
C
157 lines
6.3 KiB
C
/*
|
|
* ttalib.h
|
|
*
|
|
* Description: TTAv1 player library prototypes
|
|
* Developed by: Alexander Djourik <ald@true-audio.com>
|
|
* Pavel Zhilin <pzh@true-audio.com>
|
|
*
|
|
* Copyright (c) 2004 True Audio Software. All rights reserved.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the True Audio Software nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef TTALIB_H_
|
|
#define TTALIB_H_
|
|
|
|
#define MAX_BPS 24 /* Max supported Bit resolution */
|
|
#define MAX_NCH 2 /* Max supported number of channels (Rockbox changes: 8 -> 2) */
|
|
|
|
#ifndef MAXLINE
|
|
#define MAX_LINE 1024
|
|
#endif
|
|
|
|
/* decoded pcm sample depth (sample 28bit + sign 1bit) */
|
|
#define TTA_OUTPUT_DEPTH 29
|
|
|
|
/* return codes */
|
|
#define NO_ERROR 0 /* No errors found */
|
|
#define OPEN_ERROR 1 /* Can't open file */
|
|
#define FORMAT_ERROR 2 /* Unknown TTA format version */
|
|
#define PLAYER_ERROR 3 /* Not supported file format */
|
|
#define FILE_ERROR 4 /* File is corrupted */
|
|
#define READ_ERROR 5 /* Can't read from file */
|
|
#define MEMORY_ERROR 6 /* Insufficient memory available */
|
|
|
|
/* Rockbox speciffic: does not use FRAME_TIME */
|
|
/* #define FRAME_TIME 1.04489795918367346939 */
|
|
#define MULTIPLY_FRAME_TIME(x) (256 * (x) / 245) /* = FRAME_TIME * x */
|
|
#define SEEK_STEP (int)MULTIPLY_FRAME_TIME(1000) /* (FRAME_TIME * 1000) */
|
|
|
|
#define ISO_BUFFER_LENGTH (1024*32)
|
|
#define ISO_NBUFFERS (8)
|
|
#define ISO_BUFFERS_SIZE (4096) /* (ISO_BUFFER_LENGTH*ISO_NBUFFERS) */
|
|
#define PCM_BUFFER_LENGTH (4608)
|
|
#define MAX_SEEK_TABLE_SIZE (4096)
|
|
|
|
typedef struct {
|
|
/* FILE *HANDLE; // file handle (Rockbox does not use) */
|
|
unsigned int FILESIZE; /* compressed size */
|
|
unsigned short NCH; /* number of channels */
|
|
unsigned short BPS; /* bits per sample */
|
|
unsigned short BSIZE; /* byte size */
|
|
unsigned short FORMAT; /* audio format */
|
|
unsigned int SAMPLERATE; /* samplerate (sps) */
|
|
unsigned int DATALENGTH; /* data length in samples */
|
|
unsigned int FRAMELEN; /* frame length */
|
|
unsigned int LENGTH; /* playback time (sec) */
|
|
unsigned int STATE; /* return code */
|
|
unsigned int DATAPOS; /* size of ID3v2 header */
|
|
unsigned int BITRATE; /* average bitrate (kbps) */
|
|
/* double COMPRESS; // compression ratio (Rockbox does not use) */
|
|
/* id3_info ID3; // ID3 information (Rockbox does not use) */
|
|
} tta_info;
|
|
|
|
enum tta_seek_type
|
|
{
|
|
TTA_SEEK_TIME,
|
|
TTA_SEEK_POS,
|
|
};
|
|
|
|
/*********************** Library functions *************************/
|
|
/* Rockbox speciffic: open_tta_file() does not use */
|
|
|
|
/* Rockbox speciffic: It is used in place of open_tta_file(). */
|
|
int set_tta_info( // FUNCTION: set tta file info structure
|
|
tta_info *info); // file info structure
|
|
/*
|
|
* RETURN VALUE
|
|
* This function returns 0 if success. Otherwise, -1 is returned
|
|
* and the variable STATE of the currently using info structure
|
|
* is set to indicate the error.
|
|
*
|
|
*/
|
|
|
|
/* Rockbox speciffic: close_tta_file() does not use */
|
|
|
|
/* Rockbox speciffic: set_position() change arguments and return value. */
|
|
/*
|
|
* FUNCTION: sets playback position
|
|
* pos: seek position
|
|
* seek_time_ms / SEEK_STEP (when type is TTA_SEEK_TIME)
|
|
* file position (when type is TTA_SEEK_POS)
|
|
*/
|
|
int set_position (
|
|
unsigned int pos,
|
|
enum tta_seek_type type);
|
|
|
|
/*
|
|
* RETURN VALUE
|
|
* This function returns the seeked data position (>= 0) if success. Otherwise, -1 is returned
|
|
* and the variable STATE of the currently using info structure
|
|
* is set to indicate the error.
|
|
*
|
|
*/
|
|
|
|
int player_init ( // FUNCTION: initializes TTA player
|
|
tta_info *info); // file info structure
|
|
/*
|
|
* RETURN VALUE
|
|
* This function returns 0 if success. Otherwise, -1 is returned
|
|
* and the variable STATE of the currently using info structure
|
|
* is set to indicate the error.
|
|
*
|
|
*/
|
|
|
|
void player_stop (void); // FUNCTION: destroys memory pools
|
|
|
|
/* Rockbox speciffic: unsigned char -> int32_t */
|
|
int get_samples ( // FUNCTION: decode PCM_BUFFER_LENGTH samples
|
|
int32_t *buffer); // into the current PCM buffer position
|
|
|
|
/*
|
|
* RETURN VALUE
|
|
* This function returns the number of samples successfully decoded.
|
|
* Otherwise, -1 is returned and the variable STATE of the currently
|
|
* using info structure is set to indicate the error.
|
|
*
|
|
*/
|
|
|
|
const char *get_error_str (int error); // FUNCTION: get error description
|
|
|
|
#endif /* TTALIB_H_ */
|