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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/wavpack.c | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
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>
Diffstat (limited to 'lib/rbcodec/codecs/wavpack.c')
-rw-r--r-- | lib/rbcodec/codecs/wavpack.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/wavpack.c b/lib/rbcodec/codecs/wavpack.c new file mode 100644 index 0000000000..4d42391fc1 --- /dev/null +++ b/lib/rbcodec/codecs/wavpack.c | |||
@@ -0,0 +1,127 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2005 David Bryant | ||
11 | * | ||
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. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "codeclib.h" | ||
23 | #include "libwavpack/wavpack.h" | ||
24 | |||
25 | CODEC_HEADER | ||
26 | |||
27 | #define BUFFER_SIZE 4096 | ||
28 | |||
29 | static int32_t temp_buffer [BUFFER_SIZE] IBSS_ATTR; | ||
30 | |||
31 | static int32_t read_callback (void *buffer, int32_t bytes) | ||
32 | { | ||
33 | int32_t retval = ci->read_filebuf (buffer, bytes); | ||
34 | ci->set_offset(ci->curpos); | ||
35 | return retval; | ||
36 | } | ||
37 | |||
38 | /* this is the codec entry point */ | ||
39 | enum codec_status codec_main(enum codec_entry_call_reason reason) | ||
40 | { | ||
41 | if (reason == CODEC_LOAD) { | ||
42 | /* Generic codec initialisation */ | ||
43 | ci->configure(DSP_SET_SAMPLE_DEPTH, 28); | ||
44 | } | ||
45 | |||
46 | return CODEC_OK; | ||
47 | } | ||
48 | |||
49 | /* this is called for each file to process */ | ||
50 | enum codec_status codec_run(void) | ||
51 | { | ||
52 | WavpackContext *wpc; | ||
53 | char error [80]; | ||
54 | /* rockbox: comment 'set but unused' variables | ||
55 | int bps; | ||
56 | */ | ||
57 | int nchans, sr_100; | ||
58 | intptr_t param; | ||
59 | |||
60 | if (codec_init()) | ||
61 | return CODEC_ERROR; | ||
62 | |||
63 | ci->seek_buffer (ci->id3->offset); | ||
64 | |||
65 | /* Create a decoder instance */ | ||
66 | wpc = WavpackOpenFileInput (read_callback, error); | ||
67 | |||
68 | if (!wpc) | ||
69 | return CODEC_ERROR; | ||
70 | |||
71 | ci->configure(DSP_SWITCH_FREQUENCY, WavpackGetSampleRate (wpc)); | ||
72 | codec_set_replaygain(ci->id3); | ||
73 | /* bps = WavpackGetBytesPerSample (wpc); */ | ||
74 | nchans = WavpackGetReducedChannels (wpc); | ||
75 | ci->configure(DSP_SET_STEREO_MODE, nchans == 2 ? STEREO_INTERLEAVED : STEREO_MONO); | ||
76 | sr_100 = ci->id3->frequency / 100; | ||
77 | |||
78 | ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10); | ||
79 | |||
80 | /* The main decoder loop */ | ||
81 | |||
82 | while (1) { | ||
83 | int32_t nsamples; | ||
84 | enum codec_command_action action = ci->get_command(¶m); | ||
85 | |||
86 | if (action == CODEC_ACTION_HALT) | ||
87 | break; | ||
88 | |||
89 | if (action == CODEC_ACTION_SEEK_TIME) { | ||
90 | int curpos_ms = WavpackGetSampleIndex (wpc) / sr_100 * 10; | ||
91 | int n, d, skip; | ||
92 | |||
93 | if (param > curpos_ms) { | ||
94 | n = param - curpos_ms; | ||
95 | d = ci->id3->length - curpos_ms; | ||
96 | skip = (int)((int64_t)(ci->filesize - ci->curpos) * n / d); | ||
97 | ci->seek_buffer (ci->curpos + skip); | ||
98 | } | ||
99 | else if (curpos_ms != 0) { | ||
100 | n = curpos_ms - param; | ||
101 | d = curpos_ms; | ||
102 | skip = (int)((int64_t) ci->curpos * n / d); | ||
103 | ci->seek_buffer (ci->curpos - skip); | ||
104 | } | ||
105 | |||
106 | wpc = WavpackOpenFileInput (read_callback, error); | ||
107 | if (!wpc) | ||
108 | { | ||
109 | ci->seek_complete(); | ||
110 | break; | ||
111 | } | ||
112 | |||
113 | ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10); | ||
114 | ci->seek_complete(); | ||
115 | } | ||
116 | |||
117 | nsamples = WavpackUnpackSamples (wpc, temp_buffer, BUFFER_SIZE / nchans); | ||
118 | |||
119 | if (!nsamples) | ||
120 | break; | ||
121 | |||
122 | ci->pcmbuf_insert (temp_buffer, NULL, nsamples); | ||
123 | ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10); | ||
124 | } | ||
125 | |||
126 | return CODEC_OK; | ||
127 | } | ||