1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2010 Yoshihisa Uchida
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
23 #include "codecs/libpcm/support_formats.h"
27 /* vox codec (Dialogic telephony file formats) */
29 #define PCM_SAMPLE_SIZE (2048)
31 static int32_t samples
[PCM_SAMPLE_SIZE
] IBSS_ATTR
;
33 static struct pcm_format format
;
34 static uint32_t bytesdone
;
36 static uint8_t *read_buffer(size_t *realsize
)
38 uint8_t *buffer
= (uint8_t *)ci
->request_buffer(realsize
, format
.chunksize
);
39 if (bytesdone
+ (*realsize
) > format
.numbytes
)
40 *realsize
= format
.numbytes
- bytesdone
;
41 bytesdone
+= *realsize
;
42 ci
->advance_buffer(*realsize
);
46 /* this is the codec entry point */
47 enum codec_status
codec_main(enum codec_entry_call_reason reason
)
49 if (reason
== CODEC_LOAD
) {
50 /* Generic codec initialisation */
51 ci
->configure(DSP_SET_SAMPLE_DEPTH
, PCM_OUTPUT_DEPTH
-1);
57 /* this is called for each file to process */
58 enum codec_status
codec_run(void)
60 uint32_t decodedsamples
;
65 off_t firstblockposn
= 0; /* position of the first block in file */
66 const struct pcm_codec
*codec
;
70 DEBUGF("codec_init() error\n");
74 codec_set_replaygain(ci
->id3
);
76 /* Need to save offset for later use (cleared indirectly by advance_buffer) */
77 bytesdone
= ci
->id3
->offset
;
80 ci
->memset(&format
, 0, sizeof(struct pcm_format
));
84 format
.bitspersample
= 4;
85 format
.numbytes
= ci
->id3
->filesize
;
86 format
.blockalign
= 1;
88 /* advance to first WAVE chunk */
91 ci
->advance_buffer(firstblockposn
);
95 * supports dialogic oki adpcm only
97 codec
= get_dialogic_oki_adpcm_codec();
100 DEBUGF("CODEC_ERROR: dialogic oki adpcm codec does not load.\n");
104 if (!codec
->set_format(&format
)) {
108 if (format
.numbytes
== 0) {
109 DEBUGF("CODEC_ERROR: data size is 0\n");
113 /* check chunksize */
114 if (format
.chunksize
* 2 > PCM_SAMPLE_SIZE
)
115 format
.chunksize
= PCM_SAMPLE_SIZE
/ 2;
116 if (format
.chunksize
== 0)
118 DEBUGF("CODEC_ERROR: chunksize is 0\n");
122 ci
->configure(DSP_SWITCH_FREQUENCY
, ci
->id3
->frequency
);
123 ci
->configure(DSP_SET_STEREO_MODE
, STEREO_MONO
);
125 /* make sure we're at the correct offset */
126 if (bytesdone
> (uint32_t) firstblockposn
) {
127 /* Round down to previous block */
128 struct pcm_pos
*newpos
= codec
->get_seek_pos(bytesdone
- firstblockposn
,
129 PCM_SEEK_POS
, &read_buffer
);
131 if (newpos
->pos
> format
.numbytes
) {
134 if (ci
->seek_buffer(firstblockposn
+ newpos
->pos
))
136 bytesdone
= newpos
->pos
;
137 decodedsamples
= newpos
->samples
;
140 /* already where we need to be */
144 ci
->set_elapsed(decodedsamples
*1000LL/ci
->id3
->frequency
);
146 /* The main decoder loop */
149 while (!endofstream
) {
150 enum codec_command_action action
= ci
->get_command(¶m
);
152 if (action
== CODEC_ACTION_HALT
)
155 if (action
== CODEC_ACTION_SEEK_TIME
) {
156 struct pcm_pos
*newpos
= codec
->get_seek_pos(param
, PCM_SEEK_TIME
,
159 if (newpos
->pos
> format
.numbytes
)
161 ci
->set_elapsed(ci
->id3
->length
);
166 if (ci
->seek_buffer(firstblockposn
+ newpos
->pos
))
168 bytesdone
= newpos
->pos
;
169 decodedsamples
= newpos
->samples
;
172 ci
->set_elapsed(decodedsamples
*1000LL/ci
->id3
->frequency
);
176 voxbuf
= (uint8_t *)ci
->request_buffer(&n
, format
.chunksize
);
178 break; /* End of stream */
179 if (bytesdone
+ n
> format
.numbytes
) {
180 n
= format
.numbytes
- bytesdone
;
184 if (codec
->decode(voxbuf
, n
, samples
, &bufcount
) == CODEC_ERROR
)
186 DEBUGF("codec error\n");
190 ci
->pcmbuf_insert(samples
, NULL
, bufcount
);
191 ci
->advance_buffer(n
);
193 decodedsamples
+= bufcount
;
195 if (bytesdone
>= format
.numbytes
)
197 ci
->set_elapsed(decodedsamples
*1000LL/ci
->id3
->frequency
);