diff options
Diffstat (limited to 'apps/codecs/atrac3_rm.c')
-rw-r--r-- | apps/codecs/atrac3_rm.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/apps/codecs/atrac3_rm.c b/apps/codecs/atrac3_rm.c new file mode 100644 index 0000000000..a9c1c49fea --- /dev/null +++ b/apps/codecs/atrac3_rm.c | |||
@@ -0,0 +1,173 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * Copyright (C) 2009 Mohamed Tarek | ||
9 | * | ||
10 | * This program is free software; you can redistribute it and/or | ||
11 | * modify it under the terms of the GNU General Public License | ||
12 | * as published by the Free Software Foundation; either version 2 | ||
13 | * of the License, or (at your option) any later version. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | |||
20 | #include <string.h> | ||
21 | |||
22 | #include "logf.h" | ||
23 | #include "codeclib.h" | ||
24 | #include "inttypes.h" | ||
25 | #include "libatrac/atrac3.h" | ||
26 | |||
27 | CODEC_HEADER | ||
28 | |||
29 | RMContext rmctx; | ||
30 | RMPacket pkt; | ||
31 | ATRAC3Context q; | ||
32 | |||
33 | static void init_rm(RMContext *rmctx) | ||
34 | { | ||
35 | memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext)); | ||
36 | } | ||
37 | |||
38 | /* this is the codec entry point */ | ||
39 | enum codec_status codec_main(void) | ||
40 | { | ||
41 | static size_t buff_size; | ||
42 | int datasize, res, consumed, i, time_offset; | ||
43 | uint8_t *bit_buffer; | ||
44 | int16_t outbuf[2048] __attribute__((aligned(32))); | ||
45 | uint16_t fs,sps,h; | ||
46 | uint32_t packet_count; | ||
47 | int scrambling_unit_size, num_units, elapsed = 0; | ||
48 | |||
49 | next_track: | ||
50 | if (codec_init()) { | ||
51 | DEBUGF("codec init failed\n"); | ||
52 | return CODEC_ERROR; | ||
53 | } | ||
54 | while (!*ci->taginfo_ready && !ci->stop_codec) | ||
55 | ci->sleep(1); | ||
56 | |||
57 | codec_set_replaygain(ci->id3); | ||
58 | ci->memset(&rmctx,0,sizeof(RMContext)); | ||
59 | ci->memset(&pkt,0,sizeof(RMPacket)); | ||
60 | ci->memset(&q,0,sizeof(ATRAC3Context)); | ||
61 | |||
62 | init_rm(&rmctx); | ||
63 | |||
64 | ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency); | ||
65 | ci->configure(DSP_SET_SAMPLE_DEPTH, 16); | ||
66 | ci->configure(DSP_SET_STEREO_MODE, rmctx.nb_channels == 1 ? | ||
67 | STEREO_MONO : STEREO_INTERLEAVED); | ||
68 | |||
69 | packet_count = rmctx.nb_packets; | ||
70 | rmctx.audio_framesize = rmctx.block_align; | ||
71 | rmctx.block_align = rmctx.sub_packet_size; | ||
72 | fs = rmctx.audio_framesize; | ||
73 | sps= rmctx.block_align; | ||
74 | h = rmctx.sub_packet_h; | ||
75 | scrambling_unit_size = h*fs; | ||
76 | |||
77 | res =atrac3_decode_init(&q, &rmctx); | ||
78 | if(res < 0) { | ||
79 | DEBUGF("failed to initialize atrac decoder\n"); | ||
80 | return CODEC_ERROR; | ||
81 | } | ||
82 | |||
83 | ci->set_elapsed(0); | ||
84 | ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE); | ||
85 | |||
86 | /* The main decoder loop */ | ||
87 | seek_start : | ||
88 | while((unsigned)elapsed < rmctx.duration) | ||
89 | { | ||
90 | bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); | ||
91 | consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); | ||
92 | if(consumed < 0) { | ||
93 | DEBUGF("rm_get_packet failed\n"); | ||
94 | return CODEC_ERROR; | ||
95 | } | ||
96 | |||
97 | for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++) | ||
98 | { | ||
99 | ci->yield(); | ||
100 | if (ci->stop_codec || ci->new_track) | ||
101 | goto done; | ||
102 | |||
103 | if (ci->seek_time) { | ||
104 | ci->set_elapsed(ci->seek_time); | ||
105 | |||
106 | /* Do not allow seeking beyond the file's length */ | ||
107 | if ((unsigned) ci->seek_time > ci->id3->length) { | ||
108 | ci->seek_complete(); | ||
109 | goto done; | ||
110 | } | ||
111 | |||
112 | ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE); | ||
113 | packet_count = rmctx.nb_packets; | ||
114 | rmctx.audio_pkt_cnt = 0; | ||
115 | rmctx.frame_number = 0; | ||
116 | |||
117 | /* Seek to the start of the track */ | ||
118 | if (ci->seek_time == 1) { | ||
119 | ci->set_elapsed(0); | ||
120 | ci->seek_complete(); | ||
121 | goto seek_start; | ||
122 | } | ||
123 | num_units = ((ci->seek_time)/(sps*1000*8/rmctx.bit_rate))/(h*(fs/sps)); | ||
124 | ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE + consumed * num_units); | ||
125 | bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); | ||
126 | consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); | ||
127 | if(consumed < 0) { | ||
128 | DEBUGF("rm_get_packet failed\n"); | ||
129 | return CODEC_ERROR; | ||
130 | } | ||
131 | packet_count = rmctx.nb_packets - rmctx.audio_pkt_cnt * num_units; | ||
132 | rmctx.frame_number = ((ci->seek_time)/(sps*1000*8/rmctx.bit_rate)); | ||
133 | while(rmctx.audiotimestamp > (unsigned) ci->seek_time) { | ||
134 | rmctx.audio_pkt_cnt = 0; | ||
135 | ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE + consumed * (num_units-1)); | ||
136 | bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); | ||
137 | consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); | ||
138 | packet_count += rmctx.audio_pkt_cnt; | ||
139 | num_units--; | ||
140 | } | ||
141 | time_offset = ci->seek_time - rmctx.audiotimestamp; | ||
142 | i = (time_offset/((sps * 8 * 1000)/rmctx.bit_rate)); | ||
143 | elapsed = rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i; | ||
144 | ci->set_elapsed(elapsed); | ||
145 | ci->seek_complete(); | ||
146 | } | ||
147 | if(pkt.length) | ||
148 | res = atrac3_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i], rmctx.block_align); | ||
149 | else /* indicates that there are no remaining frames */ | ||
150 | goto done; | ||
151 | |||
152 | if(res != rmctx.block_align) { | ||
153 | DEBUGF("codec error\n"); | ||
154 | return CODEC_ERROR; | ||
155 | } | ||
156 | |||
157 | if(datasize) | ||
158 | ci->pcmbuf_insert(outbuf, NULL, q.samples_per_frame / rmctx.nb_channels); | ||
159 | elapsed = rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i; | ||
160 | ci->set_elapsed(elapsed); | ||
161 | rmctx.frame_number++; | ||
162 | } | ||
163 | packet_count -= rmctx.audio_pkt_cnt; | ||
164 | rmctx.audio_pkt_cnt = 0; | ||
165 | ci->advance_buffer(consumed); | ||
166 | } | ||
167 | |||
168 | done : | ||
169 | if (ci->request_next_track()) | ||
170 | goto next_track; | ||
171 | |||
172 | return CODEC_OK; | ||
173 | } | ||