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Diffstat (limited to 'apps/codecs/wavpack_enc.c')
-rw-r--r-- | apps/codecs/wavpack_enc.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/apps/codecs/wavpack_enc.c b/apps/codecs/wavpack_enc.c new file mode 100644 index 0000000000..cde208739f --- /dev/null +++ b/apps/codecs/wavpack_enc.c | |||
@@ -0,0 +1,230 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2006 Antonius Hellmann | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
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 | #ifndef SIMULATOR | ||
21 | |||
22 | #include "codeclib.h" | ||
23 | #include "libwavpack/wavpack.h" | ||
24 | |||
25 | CODEC_HEADER | ||
26 | |||
27 | typedef unsigned long uint32; | ||
28 | typedef unsigned short uint16; | ||
29 | typedef unsigned char uint8; | ||
30 | |||
31 | static unsigned char wav_header_ster [46] = | ||
32 | {33,22,'R','I','F','F',0,0,0,0,'W','A','V','E','f','m','t',' ',16, | ||
33 | 0,0,0,1,0,2,0,0x44,0xac,0,0,0x10,0xb1,2,0,4,0,16,0,'d','a','t','a',0,0,0,0}; | ||
34 | |||
35 | static unsigned char wav_header_mono [46] = | ||
36 | {33,22,'R','I','F','F',0,0,0,0,'W','A','V','E','f','m','t',' ',16, | ||
37 | 0,0,0,1,0,1,0,0x44,0xac,0,0,0x88,0x58,1,0,2,0,16,0,'d','a','t','a',0,0,0,0}; | ||
38 | |||
39 | static struct codec_api *ci; | ||
40 | static int enc_channels; | ||
41 | |||
42 | #define CHUNK_SIZE 20000 | ||
43 | |||
44 | static long input_buffer[CHUNK_SIZE/2] IBSS_ATTR; | ||
45 | |||
46 | void *memset(void *s, int c, size_t n) | ||
47 | { | ||
48 | return(ci->memset(s,c,n)); | ||
49 | } | ||
50 | |||
51 | void *memcpy(void *dest, const void *src, size_t n) | ||
52 | { | ||
53 | return(ci->memcpy(dest,src,n)); | ||
54 | } | ||
55 | |||
56 | /* update file header info callback function */ | ||
57 | void enc_set_header(void *head_buffer, /* ptr to the file header data */ | ||
58 | int head_size, /* size of this header data */ | ||
59 | int num_pcm_sampl, /* amount of processed pcm samples */ | ||
60 | bool is_file_header) /* update file/chunk header */ | ||
61 | { | ||
62 | if(is_file_header) | ||
63 | { | ||
64 | /* update file header before file closing */ | ||
65 | if(sizeof(WavpackHeader) + sizeof(wav_header_mono) < (unsigned)head_size) | ||
66 | { | ||
67 | char* riff_header = (char*)head_buffer + sizeof(WavpackHeader); | ||
68 | char* wv_header = (char*)head_buffer + sizeof(wav_header_mono); | ||
69 | int num_file_bytes = num_pcm_sampl * 2 * enc_channels; | ||
70 | unsigned long ckSize; | ||
71 | |||
72 | /* RIFF header and WVPK header have to be swapped */ | ||
73 | /* copy wavpack header to file start position */ | ||
74 | ci->memcpy(head_buffer, wv_header, sizeof(WavpackHeader)); | ||
75 | wv_header = head_buffer; /* recalc wavpack header position */ | ||
76 | |||
77 | if(enc_channels == 2) | ||
78 | ci->memcpy(riff_header, wav_header_ster, sizeof(wav_header_ster)); | ||
79 | else | ||
80 | ci->memcpy(riff_header, wav_header_mono, sizeof(wav_header_mono)); | ||
81 | |||
82 | /* update the Wavpack header first chunk size & total frame count */ | ||
83 | ckSize = htole32(((WavpackHeader*)wv_header)->ckSize) | ||
84 | + sizeof(wav_header_mono); | ||
85 | ((WavpackHeader*)wv_header)->total_samples = htole32(num_pcm_sampl); | ||
86 | ((WavpackHeader*)wv_header)->ckSize = htole32(ckSize); | ||
87 | |||
88 | /* update the RIFF WAV header size entries */ | ||
89 | *(long*)(riff_header+ 6) = htole32(num_file_bytes + 36); | ||
90 | *(long*)(riff_header+42) = htole32(num_file_bytes); | ||
91 | } | ||
92 | } | ||
93 | else | ||
94 | { | ||
95 | /* update timestamp (block_index) */ | ||
96 | ((WavpackHeader*)head_buffer)->block_index = htole32(num_pcm_sampl); | ||
97 | } | ||
98 | } | ||
99 | |||
100 | |||
101 | enum codec_status codec_start(struct codec_api* api) | ||
102 | { | ||
103 | int i; | ||
104 | long t; | ||
105 | uint32 *src; | ||
106 | uint32 *dst; | ||
107 | int chunk_size, num_chunks, samp_per_chunk; | ||
108 | int enc_buffer_size; | ||
109 | int enc_quality; | ||
110 | WavpackConfig config; | ||
111 | WavpackContext *wpc; | ||
112 | bool cpu_boosted = true; /* start boosted */ | ||
113 | |||
114 | ci = api; // copy to global api pointer | ||
115 | |||
116 | if(ci->enc_get_inputs == NULL || | ||
117 | ci->enc_set_parameters == NULL || | ||
118 | ci->enc_alloc_chunk == NULL || | ||
119 | ci->enc_free_chunk == NULL || | ||
120 | ci->enc_wavbuf_near_empty == NULL || | ||
121 | ci->enc_get_wav_data == NULL || | ||
122 | ci->enc_set_header_callback == NULL ) | ||
123 | return CODEC_ERROR; | ||
124 | |||
125 | ci->cpu_boost(true); | ||
126 | |||
127 | *ci->enc_set_header_callback = enc_set_header; | ||
128 | ci->enc_get_inputs(&enc_buffer_size, &enc_channels, &enc_quality); | ||
129 | |||
130 | /* configure the buffer system */ | ||
131 | chunk_size = sizeof(long) + CHUNK_SIZE * enc_channels / 2; | ||
132 | num_chunks = enc_buffer_size / chunk_size; | ||
133 | samp_per_chunk = CHUNK_SIZE / 4; | ||
134 | |||
135 | /* inform the main program about buffer dimensions and other params */ | ||
136 | /* add wav_header_mono as place holder to file start position */ | ||
137 | /* wav header and wvpk header have to be reordered later */ | ||
138 | ci->enc_set_parameters(chunk_size, num_chunks, samp_per_chunk, | ||
139 | wav_header_mono, sizeof(wav_header_mono), | ||
140 | AFMT_WAVPACK); | ||
141 | |||
142 | wpc = WavpackOpenFileOutput (); | ||
143 | |||
144 | memset (&config, 0, sizeof (config)); | ||
145 | config.bits_per_sample = 16; | ||
146 | config.bytes_per_sample = 2; | ||
147 | config.sample_rate = 44100; | ||
148 | config.num_channels = enc_channels; | ||
149 | |||
150 | if (!WavpackSetConfiguration (wpc, &config, 1)) | ||
151 | return CODEC_ERROR; | ||
152 | |||
153 | /* main application waits for this flag during encoder loading */ | ||
154 | ci->enc_codec_loaded = true; | ||
155 | |||
156 | /* main encoding loop */ | ||
157 | while(!ci->stop_codec) | ||
158 | { | ||
159 | while((src = (uint32*)ci->enc_get_wav_data(CHUNK_SIZE)) != NULL) | ||
160 | { | ||
161 | if(ci->stop_codec) | ||
162 | break; | ||
163 | |||
164 | if(ci->enc_wavbuf_near_empty() == 0) | ||
165 | { | ||
166 | if(!cpu_boosted) | ||
167 | { | ||
168 | ci->cpu_boost(true); | ||
169 | cpu_boosted = true; | ||
170 | } | ||
171 | } | ||
172 | |||
173 | dst = (uint32*)ci->enc_alloc_chunk() + 1; | ||
174 | |||
175 | WavpackStartBlock (wpc, (uint8*)dst, (uint8*)dst + CHUNK_SIZE); | ||
176 | |||
177 | if(enc_channels == 2) | ||
178 | { | ||
179 | for (i=0; i<CHUNK_SIZE/4; i++) | ||
180 | { | ||
181 | t = (long)*src++; | ||
182 | |||
183 | input_buffer[2*i + 0] = t >> 16; | ||
184 | input_buffer[2*i + 1] = (short)t; | ||
185 | } | ||
186 | } | ||
187 | else | ||
188 | { | ||
189 | for (i=0; i<CHUNK_SIZE/4; i++) | ||
190 | { | ||
191 | t = (long)*src++; | ||
192 | t = (((t<<16)>>16) + (t>>16)) >> 1; /* left+right */ | ||
193 | |||
194 | input_buffer[i] = t; | ||
195 | } | ||
196 | } | ||
197 | |||
198 | if (!WavpackPackSamples (wpc, input_buffer, CHUNK_SIZE/4)) | ||
199 | return CODEC_ERROR; | ||
200 | |||
201 | /* finish the chunk and store chunk size info */ | ||
202 | dst[-1] = WavpackFinishBlock (wpc); | ||
203 | |||
204 | ci->enc_free_chunk(); | ||
205 | ci->yield(); | ||
206 | } | ||
207 | |||
208 | if(ci->enc_wavbuf_near_empty()) | ||
209 | { | ||
210 | if(cpu_boosted) | ||
211 | { | ||
212 | ci->cpu_boost(false); | ||
213 | cpu_boosted = false; | ||
214 | } | ||
215 | } | ||
216 | ci->yield(); | ||
217 | } | ||
218 | |||
219 | if(cpu_boosted) /* set initial boost state */ | ||
220 | ci->cpu_boost(false); | ||
221 | |||
222 | /* reset parameters to initial state */ | ||
223 | ci->enc_set_parameters(0, 0, 0, 0, 0, 0); | ||
224 | |||
225 | /* main application waits for this flag during encoder removing */ | ||
226 | ci->enc_codec_loaded = false; | ||
227 | |||
228 | return CODEC_OK; | ||
229 | } | ||
230 | #endif | ||