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author | Yoshihisa Uchida <uchida@rockbox.org> | 2010-05-13 12:40:09 +0000 |
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committer | Yoshihisa Uchida <uchida@rockbox.org> | 2010-05-13 12:40:09 +0000 |
commit | 0f5c6d47d4fdd17260b840024880ba6dd3fdf935 (patch) | |
tree | 6d2526a58816aa9f6431a22a8f1a56278a445dfd /apps/codecs/tta.c | |
parent | 889b4a8ce838bd4191c736d01d9665c177e6d390 (diff) | |
download | rockbox-0f5c6d47d4fdd17260b840024880ba6dd3fdf935.tar.gz rockbox-0f5c6d47d4fdd17260b840024880ba6dd3fdf935.zip |
add True Audio (TTA) codec
decoding speed iPod video ~153%
But in some players, the decoding speed is not enough.
(e.g., H180 52.4% (thanks amiconn), H300 55.09% (thanks n1s))
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25994 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/tta.c')
-rw-r--r-- | apps/codecs/tta.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/apps/codecs/tta.c b/apps/codecs/tta.c new file mode 100644 index 0000000000..541dc2b7ef --- /dev/null +++ b/apps/codecs/tta.c | |||
@@ -0,0 +1,132 @@ | |||
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(void) | ||
38 | { | ||
39 | tta_info info; | ||
40 | int status = CODEC_OK; | ||
41 | unsigned int decodedsamples = 0; | ||
42 | int endofstream; | ||
43 | int new_pos = 0; | ||
44 | int sample_count; | ||
45 | |||
46 | /* Generic codec initialisation */ | ||
47 | ci->configure(DSP_SET_SAMPLE_DEPTH, TTA_OUTPUT_DEPTH - 1); | ||
48 | |||
49 | if (codec_init()) | ||
50 | { | ||
51 | DEBUGF("codec_init() error\n"); | ||
52 | status = CODEC_ERROR; | ||
53 | goto exit; | ||
54 | } | ||
55 | |||
56 | next_track: | ||
57 | while (!*ci->taginfo_ready && !ci->stop_codec) | ||
58 | ci->sleep(1); | ||
59 | |||
60 | if (set_tta_info(&info) < 0) | ||
61 | { | ||
62 | status = CODEC_ERROR; | ||
63 | goto exit; | ||
64 | } | ||
65 | if (player_init(&info) < 0) | ||
66 | { | ||
67 | status = CODEC_ERROR; | ||
68 | goto exit; | ||
69 | } | ||
70 | |||
71 | codec_set_replaygain(ci->id3); | ||
72 | |||
73 | ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); | ||
74 | if (info.NCH == 2) { | ||
75 | ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED); | ||
76 | } else if (info.NCH == 1) { | ||
77 | ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); | ||
78 | } else { | ||
79 | DEBUGF("CODEC_ERROR: more than 2 channels\n"); | ||
80 | status = CODEC_ERROR; | ||
81 | goto done; | ||
82 | } | ||
83 | |||
84 | /* The main decoder loop */ | ||
85 | endofstream = 0; | ||
86 | |||
87 | if (ci->id3->offset > 0) | ||
88 | { | ||
89 | /* Need to save offset for later use (cleared indirectly by advance_buffer) */ | ||
90 | new_pos = set_position(ci->id3->offset, TTA_SEEK_POS); | ||
91 | if (new_pos >= 0) | ||
92 | decodedsamples = new_pos; | ||
93 | ci->seek_complete(); | ||
94 | } | ||
95 | |||
96 | while (!endofstream) | ||
97 | { | ||
98 | ci->yield(); | ||
99 | if (ci->stop_codec || ci->new_track) | ||
100 | break; | ||
101 | |||
102 | if (ci->seek_time) | ||
103 | { | ||
104 | new_pos = set_position(ci->seek_time / SEEK_STEP, TTA_SEEK_TIME); | ||
105 | if (new_pos >= 0) | ||
106 | { | ||
107 | decodedsamples = new_pos; | ||
108 | ci->seek_complete(); | ||
109 | } | ||
110 | } | ||
111 | |||
112 | sample_count = get_samples(samples); | ||
113 | if (sample_count < 0) | ||
114 | { | ||
115 | status = CODEC_ERROR; | ||
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 | status = CODEC_OK; | ||
125 | done: | ||
126 | player_stop(); | ||
127 | if (ci->request_next_track()) | ||
128 | goto next_track; | ||
129 | |||
130 | exit: | ||
131 | return status; | ||
132 | } | ||