From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libpcm/pcm_common.h | 190 +++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 lib/rbcodec/codecs/libpcm/pcm_common.h (limited to 'lib/rbcodec/codecs/libpcm/pcm_common.h') diff --git a/lib/rbcodec/codecs/libpcm/pcm_common.h b/lib/rbcodec/codecs/libpcm/pcm_common.h new file mode 100644 index 0000000000..90e29c98ee --- /dev/null +++ b/lib/rbcodec/codecs/libpcm/pcm_common.h @@ -0,0 +1,190 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2009 Yoshihisa Uchida + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#ifndef CODEC_LIBPCM_PCM_COMMON_H +#define CODEC_LIBPCM_PCM_COMMON_H + +#include +#include +#include + +/* decoded pcm sample depth (sample 28bit + sign 1bit) */ +#define PCM_OUTPUT_DEPTH 29 + +/* Macro that sign extends an unsigned byte */ +#define SE(x) ((int32_t)((int8_t)(x))) + +/* Macro that shift to -0x80. (0 .. 127 to -128 .. -1, 128 .. 255 to 0 .. 127) */ +#define SFT(x) ((int32_t)x-0x80) + +/* Macro that clipping data */ +#define CLIP(data, min, max) \ +if ((data) > (max)) data = max; \ +else if ((data) < (min)) data = min; + +/* nums of msadpcm coeffs + * In many case, nNumCoef is 7. + * Depending upon the encoder, as for this value there is a possibility + * of increasing more. + * If you found the file where this value exceeds 7, please report. + */ +#define MSADPCM_NUM_COEFF 7 + +struct pcm_format { + /* + * RIFF: wFormatTag (in 'fmt ' chunk) + * AIFF: compressionType (in 'COMM' chunk) + */ + uint32_t formattag; + + /* + * RIFF: wChannels (in 'fmt ' chunk) + * AIFF: numChannels (in 'COMM' chunk) + */ + uint16_t channels; + + /* + * RIFF: dwSamplesPerSec (in 'fmt ' chunk) + * AIFF: sampleRate (in 'COMM' chunk) + */ + uint32_t samplespersec; + + /* RIFF: dwAvgBytesPerSec (in 'fmt ' chunk) */ + uint32_t avgbytespersec; + + /* + * RIFF: wBlockAlign (in 'fmt ' chunk) + * AIFF: blockSize (in 'SSND' chunk) + */ + uint16_t blockalign; + + /* + * RIFF: wBitsPerSample (in 'fmt ' chunk) + * AIFF: sampleSize (in 'COMM' chunk) + */ + uint16_t bitspersample; + + /* RIFF: wSize (in 'fmt ' chunk) */ + uint16_t size; + + /* RIFF: dSamplesPerBlock (in 'fmt ' chunk) */ + uint16_t samplesperblock; + + /* RIFF: wTotalSamples (in 'fact' chunk) */ + uint16_t totalsamples; + + /* the following values are not RIFF/AIFF chunk values */ + + /* bytes per sample */ + int bytespersample; + + /* chunk size */ + long chunksize; + + /* data size */ + uint32_t numbytes; + + /* + * data endian + * true: little endian, false: big endian + */ + bool is_little_endian; + + /* + * data signess + * true: signed, false: unsigned + */ + bool is_signed; + + /* the following values are format speciffic parameters */ + + /* microsoft adpcm: aCoeff */ + int16_t coeffs[MSADPCM_NUM_COEFF][2]; +}; + +struct pcm_pos { + uint32_t pos; + uint32_t samples; +}; + +#define PCM_SEEK_TIME 0 +#define PCM_SEEK_POS 1 + +struct pcm_codec { + /* + * sets the format speciffic RIFF/AIFF header information and checks the pcm_format. + * + * [In/Out] format + * the structure which supplies RIFF/AIFF header information. + * + * return + * true: RIFF/AIFF header check OK + * false: RIFF/AIFF header check NG + */ + bool (*set_format)(struct pcm_format *format); + + /* + * get seek position + * + * [In] seek_val + * seek time [ms] or seek position + * + * [In] seek_mode + * if seek_mode sets PCM_SEEK_TIME, then seek_val means the seek time. + * if seek_mode sets PCM_SEEK_POS, then seek_val means the seek position. + * + * [In] read_buffer + * the function which reads the data from the file (chunksize bytes read). + * + * return + * position after the seeking. + */ + struct pcm_pos *(*get_seek_pos)(uint32_t seek_val, int seek_mode, + uint8_t *(*read_buffer)(size_t *realsize)); + + /* + * decode wave data. + * + * [In] inbuf + * the start pointer of wave data buffer. + * + * [In] inbufsize + * wave data buffer size (bytes). + * + * [Out] outbuf + * the start pointer of the buffer which supplies decoded pcm data. + * + * [Out] outbufcount + * decoded pcm data count. + * + * return + * CODEC_OK: decode succeed. + * CODEC_ERROR: decode failure. + */ + int (*decode)(const uint8_t *inbuf, size_t inbufsize, + int32_t *outbuf, int *outbufcount); +}; + +struct pcm_entry { + uint32_t format_tag; + const struct pcm_codec *(*get_codec)(void); +}; + +#endif -- cgit v1.2.3