diff options
Diffstat (limited to 'lib/rbcodec/codecs/vtx.c')
-rw-r--r-- | lib/rbcodec/codecs/vtx.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/vtx.c b/lib/rbcodec/codecs/vtx.c new file mode 100644 index 0000000000..031af946b9 --- /dev/null +++ b/lib/rbcodec/codecs/vtx.c | |||
@@ -0,0 +1,138 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * VTX Codec for rockbox based on the Ayumi engine | ||
11 | * | ||
12 | * Ayumi engine Written by Peter Sovietov in 2015 | ||
13 | * Ported to rockbox '2019 by Roman Stolyarov | ||
14 | * | ||
15 | * | ||
16 | * This program is free software; you can redistribute it and/or | ||
17 | * modify it under the terms of the GNU General Public License | ||
18 | * as published by the Free Software Foundation; either version 2 | ||
19 | * of the License, or (at your option) any later version. | ||
20 | * | ||
21 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
22 | * KIND, either express or implied. | ||
23 | * | ||
24 | ****************************************************************************/ | ||
25 | |||
26 | #include <codecs/lib/codeclib.h> | ||
27 | #include "libayumi/ayumi_render.h" | ||
28 | |||
29 | CODEC_HEADER | ||
30 | |||
31 | #define VTX_SAMPLE_RATE 44100 | ||
32 | |||
33 | /* Maximum number of bytes to process in one iteration */ | ||
34 | #define CHUNK_SIZE (1024*2) | ||
35 | |||
36 | static int16_t samples[CHUNK_SIZE] IBSS_ATTR; | ||
37 | extern ayumi_render_t ay; | ||
38 | |||
39 | /****************** rockbox interface ******************/ | ||
40 | |||
41 | /* this is the codec entry point */ | ||
42 | enum codec_status codec_main(enum codec_entry_call_reason reason) | ||
43 | { | ||
44 | if (reason == CODEC_LOAD) { | ||
45 | /* we only render 16 bits */ | ||
46 | ci->configure(DSP_SET_SAMPLE_DEPTH, 16); | ||
47 | |||
48 | /* 44 Khz, Interleaved stereo */ | ||
49 | ci->configure(DSP_SET_FREQUENCY, VTX_SAMPLE_RATE); | ||
50 | ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED); | ||
51 | } | ||
52 | |||
53 | return CODEC_OK; | ||
54 | } | ||
55 | |||
56 | /* this is called for each file to process */ | ||
57 | enum codec_status codec_run(void) | ||
58 | { | ||
59 | uint8_t *buf; | ||
60 | size_t n; | ||
61 | intptr_t param; | ||
62 | uint32_t elapsed_time; | ||
63 | long smp; | ||
64 | int res; | ||
65 | |||
66 | /* reset values */ | ||
67 | elapsed_time = 0; | ||
68 | param = ci->id3->elapsed; | ||
69 | |||
70 | DEBUGF("VTX: next_track\n"); | ||
71 | if (codec_init()) { | ||
72 | return CODEC_ERROR; | ||
73 | } | ||
74 | |||
75 | codec_set_replaygain(ci->id3); | ||
76 | |||
77 | /* Read the entire file */ | ||
78 | DEBUGF("VTX: request file\n"); | ||
79 | ci->seek_buffer(0); | ||
80 | buf = ci->request_buffer(&n, ci->filesize); | ||
81 | if (!buf || n < (size_t)ci->filesize) { | ||
82 | DEBUGF("VTX: file load failed\n"); | ||
83 | return CODEC_ERROR; | ||
84 | } | ||
85 | |||
86 | res = AyumiRender_LoadFile((void *)buf, ci->filesize); | ||
87 | if (!res) { | ||
88 | DEBUGF("VTX: AyumiRender_LoadFile failed\n"); | ||
89 | return CODEC_ERROR; | ||
90 | } | ||
91 | |||
92 | res = AyumiRender_AyInit(ay.info.chiptype, VTX_SAMPLE_RATE, ay.info.chipfreq, ay.info.playerfreq, 1); | ||
93 | if (!res) { | ||
94 | DEBUGF("VTX: AyumiRender_AyInit failed\n"); | ||
95 | return CODEC_ERROR; | ||
96 | } | ||
97 | |||
98 | res = AyumiRender_SetLayout(ay.info.layout, 0); | ||
99 | if (!res) { | ||
100 | DEBUGF("VTX: AyumiRender_SetLayout failed\n"); | ||
101 | return CODEC_ERROR; | ||
102 | } | ||
103 | |||
104 | if (param) { | ||
105 | goto resume_start; | ||
106 | } | ||
107 | |||
108 | /* The main decoder loop */ | ||
109 | while (1) { | ||
110 | long action = ci->get_command(¶m); | ||
111 | |||
112 | if (action == CODEC_ACTION_HALT) | ||
113 | break; | ||
114 | |||
115 | if (action == CODEC_ACTION_SEEK_TIME) { | ||
116 | resume_start: | ||
117 | ci->set_elapsed(param); | ||
118 | elapsed_time = param; | ||
119 | ulong sample = ((ulong)elapsed_time * 441) / 10; | ||
120 | AyumiRender_Seek(sample); | ||
121 | ci->seek_complete(); | ||
122 | } | ||
123 | |||
124 | /* Generate audio buffer */ | ||
125 | smp = AyumiRender_AySynth((void *)&samples[0], CHUNK_SIZE >> 1); | ||
126 | |||
127 | ci->pcmbuf_insert(samples, NULL, smp); | ||
128 | |||
129 | /* Set elapsed time for one track files */ | ||
130 | elapsed_time += smp * 10 / 441; | ||
131 | ci->set_elapsed(elapsed_time); | ||
132 | |||
133 | if (AyumiRender_GetPos() >= AyumiRender_GetMaxPos()) | ||
134 | break; | ||
135 | } | ||
136 | |||
137 | return CODEC_OK; | ||
138 | } | ||