Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

1 files changed, 190 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libpcm/pcm_common.h b/lib/rbcodec/codecs/libpcm/pcm_common.h
new file mode 100644
index 0000000..90e29c9
--- /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 <stdbool.h>
+#include <inttypes.h>
+#include <string.h>
+
+/* 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