diff options
Diffstat (limited to 'lib/rbcodec/codecs/aac_bsf.c')
-rw-r--r-- | lib/rbcodec/codecs/aac_bsf.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/aac_bsf.c b/lib/rbcodec/codecs/aac_bsf.c new file mode 100644 index 0000000000..3bce283958 --- /dev/null +++ b/lib/rbcodec/codecs/aac_bsf.c | |||
@@ -0,0 +1,157 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Codec for aac files without container | ||
11 | * | ||
12 | * Written by Igor B. Poretsky | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | #include "codeclib.h" | ||
25 | #include "libfaad/common.h" | ||
26 | #include "libfaad/structs.h" | ||
27 | #include "libfaad/decoder.h" | ||
28 | |||
29 | CODEC_HEADER | ||
30 | |||
31 | /* The maximum buffer size handled by faad. 12 bytes are required by libfaad | ||
32 | * as headroom (see libfaad/bits.c). FAAD_BYTE_BUFFER_SIZE bytes are buffered | ||
33 | * for each frame. */ | ||
34 | #define FAAD_BYTE_BUFFER_SIZE (2048-12) | ||
35 | |||
36 | static void update_playing_time(void) | ||
37 | { | ||
38 | ci->set_elapsed((unsigned long)((ci->id3->offset - ci->id3->first_frame_offset) * 8LL / ci->id3->bitrate)); | ||
39 | } | ||
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 | /* Generic codec initialisation */ | ||
46 | ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED); | ||
47 | ci->configure(DSP_SET_SAMPLE_DEPTH, 29); | ||
48 | } | ||
49 | |||
50 | return CODEC_OK; | ||
51 | } | ||
52 | |||
53 | /* this is called for each file to process */ | ||
54 | enum codec_status codec_run(void) | ||
55 | { | ||
56 | size_t n; | ||
57 | int32_t bread; | ||
58 | unsigned int frame_samples; | ||
59 | uint32_t s = 0; | ||
60 | unsigned char c = 0; | ||
61 | long action = CODEC_ACTION_NULL; | ||
62 | intptr_t param; | ||
63 | unsigned char* buffer; | ||
64 | NeAACDecFrameInfo frame_info; | ||
65 | NeAACDecHandle decoder; | ||
66 | NeAACDecConfigurationPtr conf; | ||
67 | |||
68 | /* Clean and initialize decoder structures */ | ||
69 | if (codec_init()) { | ||
70 | LOGF("FAAD: Codec init error\n"); | ||
71 | return CODEC_ERROR; | ||
72 | } | ||
73 | |||
74 | ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency); | ||
75 | codec_set_replaygain(ci->id3); | ||
76 | |||
77 | ci->seek_buffer(ci->id3->first_frame_offset); | ||
78 | |||
79 | /* initialise the sound converter */ | ||
80 | decoder = NeAACDecOpen(); | ||
81 | |||
82 | if (!decoder) { | ||
83 | LOGF("FAAD: Decode open error\n"); | ||
84 | return CODEC_ERROR; | ||
85 | } | ||
86 | |||
87 | conf = NeAACDecGetCurrentConfiguration(decoder); | ||
88 | conf->outputFormat = FAAD_FMT_24BIT; /* irrelevant, we don't convert */ | ||
89 | NeAACDecSetConfiguration(decoder, conf); | ||
90 | |||
91 | buffer=ci->request_buffer(&n, FAAD_BYTE_BUFFER_SIZE); | ||
92 | bread = NeAACDecInit(decoder, buffer, n, &s, &c); | ||
93 | if (bread < 0) { | ||
94 | LOGF("FAAD: DecInit: %ld, %d\n", bread, decoder->object_type); | ||
95 | return CODEC_ERROR; | ||
96 | } | ||
97 | ci->advance_buffer(bread); | ||
98 | |||
99 | if (ci->id3->offset > ci->id3->first_frame_offset) { | ||
100 | /* Resume the desired (byte) position. */ | ||
101 | ci->seek_buffer(ci->id3->offset); | ||
102 | NeAACDecPostSeekReset(decoder, 0); | ||
103 | update_playing_time(); | ||
104 | } else if (ci->id3->elapsed) { | ||
105 | action = CODEC_ACTION_SEEK_TIME; | ||
106 | param = ci->id3->elapsed; | ||
107 | } else { | ||
108 | ci->set_elapsed(0); | ||
109 | ci->set_offset(ci->id3->first_frame_offset); | ||
110 | } | ||
111 | |||
112 | /* The main decoding loop */ | ||
113 | while (1) { | ||
114 | if (action == CODEC_ACTION_NULL) | ||
115 | action = ci->get_command(¶m); | ||
116 | |||
117 | if (action == CODEC_ACTION_HALT) | ||
118 | break; | ||
119 | |||
120 | /* Deal with any pending seek requests */ | ||
121 | if (action == CODEC_ACTION_SEEK_TIME) { | ||
122 | /* Seek to the desired time position. */ | ||
123 | ci->seek_buffer(ci->id3->first_frame_offset + (uint32_t)((uint64_t)param * ci->id3->bitrate / 8)); | ||
124 | ci->set_elapsed((unsigned long)param); | ||
125 | NeAACDecPostSeekReset(decoder, 0); | ||
126 | ci->seek_complete(); | ||
127 | } | ||
128 | |||
129 | action = CODEC_ACTION_NULL; | ||
130 | |||
131 | /* Request the required number of bytes from the input buffer */ | ||
132 | buffer=ci->request_buffer(&n, FAAD_BYTE_BUFFER_SIZE); | ||
133 | |||
134 | if (n == 0) /* End of Stream */ | ||
135 | break; | ||
136 | |||
137 | /* Decode one block - returned samples will be host-endian */ | ||
138 | if (NeAACDecDecode(decoder, &frame_info, buffer, n) == NULL || frame_info.error > 0) { | ||
139 | LOGF("FAAD: decode error '%s'\n", NeAACDecGetErrorMessage(frame_info.error)); | ||
140 | return CODEC_ERROR; | ||
141 | } | ||
142 | |||
143 | /* Advance codec buffer (no need to call set_offset because of this) */ | ||
144 | ci->advance_buffer(frame_info.bytesconsumed); | ||
145 | |||
146 | /* Output the audio */ | ||
147 | ci->yield(); | ||
148 | frame_samples = frame_info.samples >> 1; | ||
149 | ci->pcmbuf_insert(&decoder->time_out[0][0], &decoder->time_out[1][0], frame_samples); | ||
150 | |||
151 | /* Update the elapsed-time indicator */ | ||
152 | update_playing_time(); | ||
153 | } | ||
154 | |||
155 | LOGF("AAC: Decoding complete\n"); | ||
156 | return CODEC_OK; | ||
157 | } | ||