summaryrefslogtreecommitdiffstats
path: root/firmware/export/audio.h
blob: 910791c7fd05efd8dadbb868e16d5e8c09c213a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 by Linus Nielsen Feltzing
 *
 * 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 AUDIO_H
#define AUDIO_H

#include <stdbool.h>
#include <string.h> /* size_t */
#include "config.h"
/* These must always be included with audio.h for this to compile under
   cetain conditions. Do it here or else spread the complication around to
   many files. */
#if CONFIG_CODEC == SWCODEC
#include "pcm_sampr.h"
#include "pcm.h"
#ifdef HAVE_RECORDING
#include "enc_base.h"
#endif /* HAVE_RECORDING */
#endif /* CONFIG_CODEC == SWCODEC */

#define AUDIO_STATUS_PLAY       0x0001
#define AUDIO_STATUS_PAUSE      0x0002
#define AUDIO_STATUS_RECORD     0x0004
#define AUDIO_STATUS_PRERECORD  0x0008
#define AUDIO_STATUS_ERROR      0x0010
#define AUDIO_STATUS_WARNING    0x0020

#define AUDIOERR_DISK_FULL      1

#define AUDIO_GAIN_LINEIN       0
#define AUDIO_GAIN_MIC          1


void audio_init(void) INIT_ATTR;
void audio_play(long offset);
void audio_stop(void);
void audio_pause(void);
void audio_resume(void);
void audio_next(void);
void audio_prev(void);
int audio_status(void);
void audio_ff_rewind(long newpos);
void audio_flush_and_reload_tracks(void);
struct mp3entry* audio_current_track(void);
struct mp3entry* audio_next_track(void);
bool audio_peek_track(struct mp3entry* id3, int offset);
#ifdef HAVE_DISK_STORAGE
void audio_set_buffer_margin(int setting);
#endif
void audio_error_clear(void);
int audio_get_file_pos(void);
void audio_beep(int duration);

#if CONFIG_CODEC == SWCODEC
/* Required call when audio buffer is required for some other purpose */
unsigned char *audio_get_buffer(bool talk_buf, size_t *buffer_size); 
/* only implemented in playback.c, but called from firmware */

void audio_next_dir(void);
void audio_prev_dir(void);

#else /* hwcodec only */
struct audio_debug
{
        int audiobuflen;
        int audiobuf_write;
        int audiobuf_swapwrite;
        int audiobuf_read;

        int last_dma_chunk_size;

        bool dma_on;
        bool playing;
        bool play_pending;
        bool is_playing;
        bool filling;
        bool dma_underrun;

        int unplayed_space;
        int playable_space;
        int unswapped_space;

        int low_watermark_level;
        int lowest_watermark_level;
};

void audio_get_debugdata(struct audio_debug *dbgdata);
/* unsigned int audio_error(void); - unused function */
void audio_init_playback(void);

#define audio_next_dir() ({ })
#define audio_prev_dir() ({ })

#endif

/* channel modes */
enum rec_channel_modes
{
    __CHN_MODE_START_INDEX = -1,

    CHN_MODE_STEREO,
    CHN_MODE_MONO,

    CHN_NUM_MODES
};

#if CONFIG_CODEC == SWCODEC
/* channel mode capability bits */
#define CHN_CAP_STEREO  (1 << CHN_MODE_STEREO)
#define CHN_CAP_MONO    (1 << CHN_MODE_MONO)
#define CHN_CAP_ALL     (CHN_CAP_STEREO | CHN_CAP_MONO)
#endif /* CONFIG_CODEC == SWCODEC */

/* the enums below must match prestr[] in recording.c */
enum audio_sources
{
    AUDIO_SRC_PLAYBACK = -1, /* Virtual source */
    HAVE_MIC_IN_(AUDIO_SRC_MIC,)
    HAVE_LINE_IN_(AUDIO_SRC_LINEIN,)
    HAVE_SPDIF_IN_(AUDIO_SRC_SPDIF,)
    HAVE_FMRADIO_IN_(AUDIO_SRC_FMRADIO,)
    AUDIO_NUM_SOURCES,
    AUDIO_SRC_MAX = AUDIO_NUM_SOURCES-1,
    AUDIO_SRC_DEFAULT = AUDIO_SRC_PLAYBACK
};

extern int audio_channels;
extern int audio_output_source;

#ifdef HAVE_RECORDING
/* Recordable source implies it has the input as well */

/* For now there's no restrictions on any targets with which inputs
   are recordable so define them as equivalent - if they do differ,
   special handling is needed right now. */
enum rec_sources
{
    __REC_SRC_FIRST = -1,
    HAVE_MIC_REC_(REC_SRC_MIC,)
    HAVE_LINE_REC_(REC_SRC_LINEIN,)
    HAVE_SPDIF_REC_(REC_SRC_SPDIF,)
    HAVE_FMRADIO_REC_(REC_SRC_FMRADIO,)
    REC_NUM_SOURCES
};
#endif /* HAVE_RECORDING */

#if CONFIG_CODEC == SWCODEC
/* selects a source to monitor for recording or playback */
#define SRCF_PLAYBACK         0x0000    /* default */
#define SRCF_RECORDING        0x1000
#if CONFIG_TUNER
/* for AUDIO_SRC_FMRADIO */
#define SRCF_FMRADIO_PLAYING  0x0000    /* default */
#define SRCF_FMRADIO_PAUSED   0x2000
#endif
#endif

#ifdef HAVE_RECORDING
/* parameters for audio_set_recording_options */
struct audio_recording_options
{
    int  rec_source;
    int  rec_frequency;
    int  rec_channels;
    int  rec_prerecord_time;
#if CONFIG_CODEC == SWCODEC
    int  rec_mono_mode;
    int  rec_source_flags;  /* for rec_set_source */
    struct encoder_config enc_config;
#else
    int  rec_quality;
    bool rec_editable;
#endif
};

/* audio recording functions */
void audio_init_recording(unsigned int buffer_offset);
void audio_close_recording(void);
void audio_record(const char *filename);
void audio_stop_recording(void);
void audio_pause_recording(void);
void audio_resume_recording(void);
void audio_new_file(const char *filename);
void audio_set_recording_options(struct audio_recording_options *options);
void audio_set_recording_gain(int left, int right, int type);
unsigned long audio_recorded_time(void);
unsigned long audio_num_recorded_bytes(void);

#if CONFIG_CODEC == SWCODEC
/* SWCODEC recording functions */
/* playback.c */
bool audio_load_encoder(int afmt);
void audio_remove_encoder(void);
unsigned char *audio_get_recording_buffer(size_t *buffer_size);
#endif /* CONFIG_CODEC == SWCODEC */

#endif /* HAVE_RECORDING */

#if CONFIG_CODEC == SWCODEC
/* SWCODEC misc. audio functions */
#if INPUT_SRC_CAPS != 0
/* audio.c */
void audio_set_input_source(int source, unsigned flags);
/* audio_input_mux: target-specific implementation used by audio_set_source
   to set hardware inputs and audio paths */
void audio_input_mux(int source, unsigned flags);
void audio_set_output_source(int source);
#endif /* INPUT_SRC_CAPS */
#endif /* CONFIG_CODEC == SWCODEC */

#ifdef HAVE_SPDIF_IN
/* returns index into rec_master_sampr_list */
int audio_get_spdif_sample_rate(void);
/* > 0: monitor EBUin, 0: Monitor IISrecv, <0: reset only */
void audio_spdif_set_monitor(int monitor_spdif);
#endif /* HAVE_SPDIF_IN */

unsigned long audio_prev_elapsed(void);

#if CONFIG_CODEC != SWCODEC
/***********************************************************************/
/* audio event handling */

/* subscribe to one or more audio event(s) by OR'ing together the desired */
/* event IDs (defined below); a handler is called with a solitary event ID */
/* (so switch() is okay) and possibly some useful data (depending on the */
/* event); a handler must return one of the return codes defined below */

typedef int (*AUDIO_EVENT_HANDLER)(unsigned short event, unsigned long data);

void audio_register_event_handler(AUDIO_EVENT_HANDLER handler, unsigned short mask);

/***********************************************************************/
/* handler return codes */

#define AUDIO_EVENT_RC_IGNORED      200 
    /* indicates that no action was taken or the event was not recognized */

#define AUDIO_EVENT_RC_HANDLED      201 
    /* indicates that the event was handled and some action was taken which renders 
    the original event invalid; USE WITH CARE!; this return code aborts all further 
    processing of the given event */

/***********************************************************************/
/* audio event IDs */

#define AUDIO_EVENT_POS_REPORT      (1<<0)  
    /* sends a periodic song position report to handlers; a report is sent on
    each kernal tick; the number of ticks per second is defined by HZ; on each 
    report the current song position is passed in 'data'; if a handler takes an 
    action that changes the song or the song position it must return 
    AUDIO_EVENT_RC_HANDLED which suppresses the event for any remaining handlers */

#define AUDIO_EVENT_END_OF_TRACK    (1<<1) 
    /* generated when the end of the currently playing track is reached; no
    data is passed; if the handler implements some alternate end-of-track
    processing it should return AUDIO_EVENT_RC_HANDLED which suppresses the
    event for any remaining handlers as well as the normal end-of-track 
    processing */

#endif
#endif