diff options
Diffstat (limited to 'lib/rbcodec/codecs/tta.c')
-rw-r--r-- | lib/rbcodec/codecs/tta.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/tta.c b/lib/rbcodec/codecs/tta.c new file mode 100644 index 0000000000..dda33b3f5e --- /dev/null +++ b/lib/rbcodec/codecs/tta.c | |||
@@ -0,0 +1,127 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2010 Yoshihisa Uchida | ||
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 "codecs/libtta/ttalib.h" | ||
24 | |||
25 | CODEC_HEADER | ||
26 | |||
27 | /* | ||
28 | * TTA (True Audio) codec: | ||
29 | * | ||
30 | * References | ||
31 | * [1] TRUE AUDIO CODEC SOFTWARE http://true-audio.com/ | ||
32 | */ | ||
33 | |||
34 | static int32_t samples[PCM_BUFFER_LENGTH * 2] IBSS_ATTR; | ||
35 | |||
36 | /* this is the codec entry point */ | ||
37 | enum codec_status codec_main(enum codec_entry_call_reason reason) | ||
38 | { | ||
39 | if (reason == CODEC_LOAD) { | ||
40 | /* Generic codec initialisation */ | ||
41 | ci->configure(DSP_SET_SAMPLE_DEPTH, TTA_OUTPUT_DEPTH - 1); | ||
42 | } | ||
43 | |||
44 | return CODEC_OK; | ||
45 | } | ||
46 | |||
47 | /* this is called for each file to process */ | ||
48 | enum codec_status codec_run(void) | ||
49 | { | ||
50 | tta_info info; | ||
51 | unsigned int decodedsamples; | ||
52 | int endofstream; | ||
53 | int new_pos = 0; | ||
54 | int sample_count; | ||
55 | intptr_t param; | ||
56 | |||
57 | if (codec_init()) | ||
58 | { | ||
59 | DEBUGF("codec_init() error\n"); | ||
60 | return CODEC_ERROR; | ||
61 | } | ||
62 | |||
63 | ci->seek_buffer(0); | ||
64 | |||
65 | if (set_tta_info(&info) < 0 || player_init(&info) < 0) | ||
66 | return CODEC_ERROR; | ||
67 | |||
68 | codec_set_replaygain(ci->id3); | ||
69 | |||
70 | ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); | ||
71 | if (info.NCH == 2) { | ||
72 | ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED); | ||
73 | } else if (info.NCH == 1) { | ||
74 | ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); | ||
75 | } else { | ||
76 | DEBUGF("CODEC_ERROR: more than 2 channels\n"); | ||
77 | player_stop(); | ||
78 | return CODEC_ERROR; | ||
79 | } | ||
80 | |||
81 | /* The main decoder loop */ | ||
82 | decodedsamples = 0; | ||
83 | endofstream = 0; | ||
84 | |||
85 | if (ci->id3->offset > 0) | ||
86 | { | ||
87 | /* Need to save offset for later use (cleared indirectly by advance_buffer) */ | ||
88 | new_pos = set_position(ci->id3->offset, TTA_SEEK_POS); | ||
89 | if (new_pos >= 0) | ||
90 | decodedsamples = new_pos; | ||
91 | } | ||
92 | |||
93 | ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH); | ||
94 | |||
95 | while (!endofstream) | ||
96 | { | ||
97 | enum codec_command_action action = ci->get_command(¶m); | ||
98 | |||
99 | if (action == CODEC_ACTION_HALT) | ||
100 | break; | ||
101 | |||
102 | if (action == CODEC_ACTION_SEEK_TIME) | ||
103 | { | ||
104 | new_pos = set_position(param / SEEK_STEP, TTA_SEEK_TIME); | ||
105 | if (new_pos >= 0) | ||
106 | { | ||
107 | decodedsamples = new_pos; | ||
108 | } | ||
109 | |||
110 | ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH); | ||
111 | ci->seek_complete(); | ||
112 | } | ||
113 | |||
114 | sample_count = get_samples(samples); | ||
115 | if (sample_count < 0) | ||
116 | break; | ||
117 | |||
118 | ci->pcmbuf_insert(samples, NULL, sample_count); | ||
119 | decodedsamples += sample_count; | ||
120 | if (decodedsamples >= info.DATALENGTH) | ||
121 | endofstream = 1; | ||
122 | ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH); | ||
123 | } | ||
124 | |||
125 | player_stop(); | ||
126 | return CODEC_OK; | ||
127 | } | ||