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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Base declarations for working with software encoders
*
* Copyright (C) 2006-2013 Michael Sevakis
*
* 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 ENC_BASE_H
#define ENC_BASE_H
#include <sys/types.h>
/** Encoder config structures **/
/** aiff_enc.codec **/
struct aiff_enc_config
{
#if 0
unsigned long sample_depth;
#endif
};
/** mp3_enc.codec **/
#define MP3_BITR_CAP_8 (1 << 0)
#define MP3_BITR_CAP_16 (1 << 1)
#define MP3_BITR_CAP_24 (1 << 2)
#define MP3_BITR_CAP_32 (1 << 3)
#define MP3_BITR_CAP_40 (1 << 4)
#define MP3_BITR_CAP_48 (1 << 5)
#define MP3_BITR_CAP_56 (1 << 6)
#define MP3_BITR_CAP_64 (1 << 7)
#define MP3_BITR_CAP_80 (1 << 8)
#define MP3_BITR_CAP_96 (1 << 9)
#define MP3_BITR_CAP_112 (1 << 10)
#define MP3_BITR_CAP_128 (1 << 11)
#define MP3_BITR_CAP_144 (1 << 12)
#define MP3_BITR_CAP_160 (1 << 13)
#define MP3_BITR_CAP_192 (1 << 14)
#define MP3_BITR_CAP_224 (1 << 15)
#define MP3_BITR_CAP_256 (1 << 16)
#define MP3_BITR_CAP_320 (1 << 17)
#define MP3_ENC_NUM_BITR 18
/* MPEG 1 */
#define MPEG1_SAMPR_CAPS (SAMPR_CAP_32 | SAMPR_CAP_48 | SAMPR_CAP_44)
#define MPEG1_BITR_CAPS (MP3_BITR_CAP_32 | MP3_BITR_CAP_40 | \
MP3_BITR_CAP_48 | MP3_BITR_CAP_56 | \
MP3_BITR_CAP_64 | MP3_BITR_CAP_80 | \
MP3_BITR_CAP_96 | MP3_BITR_CAP_112 | \
MP3_BITR_CAP_128 | MP3_BITR_CAP_160 | \
MP3_BITR_CAP_192 | MP3_BITR_CAP_224 | \
MP3_BITR_CAP_256 | MP3_BITR_CAP_320)
/* MPEG 2 */
#define MPEG2_SAMPR_CAPS (SAMPR_CAP_22 | SAMPR_CAP_24 | SAMPR_CAP_16)
#define MPEG2_BITR_CAPS (MP3_BITR_CAP_8 | MP3_BITR_CAP_16 | \
MP3_BITR_CAP_24 | MP3_BITR_CAP_32 | \
MP3_BITR_CAP_40 | MP3_BITR_CAP_48 | \
MP3_BITR_CAP_56 | MP3_BITR_CAP_64 | \
MP3_BITR_CAP_80 | MP3_BITR_CAP_96 | \
MP3_BITR_CAP_112 | MP3_BITR_CAP_128 | \
MP3_BITR_CAP_144 | MP3_BITR_CAP_160)
#if 0
/* MPEG 2.5 */
#define MPEG2_5_SAMPR_CAPS (SAMPR_CAP_8 | SAMPR_CAP_12 | SAMPR_CAP_11)
#define MPEG2_5_BITR_CAPS MPEG2_BITR_CAPS
#endif
/* HAVE_MPEG* defines mainly apply to the bitrate menu */
#if (REC_SAMPR_CAPS & MPEG1_SAMPR_CAPS) || defined (HAVE_SPDIF_REC)
#define HAVE_MPEG1_SAMPR
#endif
#if (REC_SAMPR_CAPS & MPEG2_SAMPR_CAPS) || defined (HAVE_SPDIF_REC)
#define HAVE_MPEG2_SAMPR
#endif
#if 0
#if (REC_SAMPR_CAPS & MPEG2_5_SAMPR_CAPS) || defined (HAVE_SPDIF_REC)
#define HAVE_MPEG2_5_SAMPR
#endif
#endif /* 0 */
#define MP3_ENC_SAMPR_CAPS (MPEG1_SAMPR_CAPS | MPEG2_SAMPR_CAPS)
/* This number is count of full encoder set */
#define MP3_ENC_NUM_SAMPR 6
#if 0
extern const unsigned long mp3_enc_sampr[MP3_ENC_NUM_SAMPR];
#endif
extern const unsigned long mp3_enc_bitr[MP3_ENC_NUM_BITR];
struct mp3_enc_config
{
unsigned long bitrate;
};
#define MP3_ENC_BITRATE_CFG_DEFAULT 11 /* 128 */
#define MP3_ENC_BITRATE_CFG_VALUE_LIST "8,16,24,32,40,48,56,64,80,96," \
"112,128,144,160,192,224,256,320"
/** wav_enc.codec **/
#define WAV_ENC_SAMPR_CAPS SAMPR_CAP_ALL
struct wav_enc_config
{
#if 0
unsigned long sample_depth;
#endif
};
/** wavpack_enc.codec **/
#define WAVPACK_ENC_SAMPR_CAPS SAMPR_CAP_ALL
struct wavpack_enc_config
{
#if 0
unsigned long sample_depth;
#endif
};
/* General config information about any encoder */
struct encoder_config
{
union
{
/* states which *_enc_config member is valid */
int rec_format; /* REC_FORMAT_* value */
int afmt; /* AFMT_* value */
};
union
{
struct mp3_enc_config mp3_enc;
struct wavpack_enc_config wavpack_enc;
struct wav_enc_config wav_enc;
};
};
/** Encoder chunk macros and definitions **/
/* What sort of data does the header describe? */
enum CHUNK_T
{
CHUNK_T_DATA = 0x0, /* Encoded audio data */
CHUNK_T_STREAM_START = 0x1, /* Stream start marker */
CHUNK_T_STREAM_END = 0x2, /* Stream end marker */
CHUNK_T_WRAP = 0x3 /* Buffer early wrap marker */
};
/* Header for every buffer slot and chunk */
union enc_chunk_hdr
{
struct
{
uint32_t type : 2; /* Chunk type (CHUNK_T_*) */
uint32_t err : 1; /* Encoder error */
uint32_t pre : 1; /* Chunk is prerecorded data */
uint32_t aux0 : 1; /* Aux flag 0 - for encoder */
uint32_t unused : 3; /* */
uint32_t size : 24; /* size of data */
};
uint32_t zero; /* Zero-out struct access */
intptr_t reserved1; /* Want it at least pointer-sized */
} __attribute__((__may_alias__));
#define ENC_HDR_SIZE (sizeof (union enc_chunk_hdr))
/* When hdr.type is CHUNK_T_STREAM_START */
struct enc_chunk_file
{
union enc_chunk_hdr hdr; /* This chunk's header */
/* hdr.size = slot count of chunk */
char path[]; /* NULL-terminated path of file */
} __attribute__((__may_alias__));
/* If flags = CHUNK_T_STREAM_END, just the header exists */
/* When hdr.type is CHUNK_T_DATA */
struct enc_chunk_data
{
union enc_chunk_hdr hdr; /* IN,OUT: This chunk's header */
/* hdr.size = total size of data[] */
uint32_t pcm_count; /* OUT: number of PCM samples encoded */
uint8_t data[]; /* OUT: encoded audio data */
} __attribute__((__may_alias__));
/* CHUNK_T_STREAM_END and CHUNK_T_WRAP consist of only the header */
#define ENC_FILE_HDR(hdr) ((struct enc_chunk_file *)(hdr))
#define ENC_DATA_HDR(hdr) ((struct enc_chunk_data *)(hdr))
/* Audio and encoder stream parameters */
struct enc_inputs
{
/* IN parameters */
unsigned long sample_rate; /* PCM samplerate setting */
int num_channels; /* Number of audio channels */
struct encoder_config *config; /* Encoder settings */
/* IN,OUT parameters */
unsigned long enc_sample_rate; /* Actual sample rate accepted by encoder
(for recorded time calculation) */
};
enum enc_callback_reason
{
ENC_CB_INPUTS, /* 'params' is struct enc_inputs * */
ENC_CB_STREAM, /* 'params' is union enc_chunk_hdr * */
};
typedef int (* enc_callback_t)(enum enc_callback_reason reason, void *params);
#endif /* ENC_BASE_H */
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