diff options
Diffstat (limited to 'lib/rbcodec/codecs/libspeex/speex_header.c')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/speex_header.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/speex_header.c b/lib/rbcodec/codecs/libspeex/speex_header.c new file mode 100644 index 0000000000..b0e98b7c9c --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/speex_header.c | |||
@@ -0,0 +1,188 @@ | |||
1 | /* Copyright (C) 2002 Jean-Marc Valin | ||
2 | File: speex_header.c | ||
3 | Describes the Speex header | ||
4 | |||
5 | Redistribution and use in source and binary forms, with or without | ||
6 | modification, are permitted provided that the following conditions | ||
7 | are met: | ||
8 | |||
9 | - Redistributions of source code must retain the above copyright | ||
10 | notice, this list of conditions and the following disclaimer. | ||
11 | |||
12 | - Redistributions in binary form must reproduce the above copyright | ||
13 | notice, this list of conditions and the following disclaimer in the | ||
14 | documentation and/or other materials provided with the distribution. | ||
15 | |||
16 | - Neither the name of the Xiph.org Foundation nor the names of its | ||
17 | contributors may be used to endorse or promote products derived from | ||
18 | this software without specific prior written permission. | ||
19 | |||
20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
21 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
22 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
23 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR | ||
24 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
25 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
26 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
27 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
28 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
29 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
31 | |||
32 | */ | ||
33 | |||
34 | #ifdef HAVE_CONFIG_H | ||
35 | #include "config-speex.h" | ||
36 | #endif | ||
37 | |||
38 | #include "arch.h" | ||
39 | #include "speex/speex_header.h" | ||
40 | #include "speex/speex.h" | ||
41 | #include "os_support.h" | ||
42 | |||
43 | #ifndef NULL | ||
44 | #define NULL 0 | ||
45 | #endif | ||
46 | |||
47 | /** Convert little endian */ | ||
48 | static inline spx_int32_t le_int(spx_int32_t i) | ||
49 | { | ||
50 | #ifdef ROCKBOX | ||
51 | return letoh32(i); | ||
52 | #elif !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) ) | ||
53 | spx_uint32_t ui, ret; | ||
54 | ui = i; | ||
55 | ret = ui>>24; | ||
56 | ret |= (ui>>8)&0x0000ff00; | ||
57 | ret |= (ui<<8)&0x00ff0000; | ||
58 | ret |= (ui<<24); | ||
59 | return ret; | ||
60 | #else | ||
61 | return i; | ||
62 | #endif | ||
63 | } | ||
64 | |||
65 | #define ENDIAN_SWITCH(x) {x=le_int(x);} | ||
66 | |||
67 | |||
68 | /* | ||
69 | typedef struct SpeexHeader { | ||
70 | char speex_string[8]; | ||
71 | char speex_version[SPEEX_HEADER_VERSION_LENGTH]; | ||
72 | int speex_version_id; | ||
73 | int header_size; | ||
74 | int rate; | ||
75 | int mode; | ||
76 | int mode_bitstream_version; | ||
77 | int nb_channels; | ||
78 | int bitrate; | ||
79 | int frame_size; | ||
80 | int vbr; | ||
81 | int frames_per_packet; | ||
82 | int extra_headers; | ||
83 | int reserved1; | ||
84 | int reserved2; | ||
85 | } SpeexHeader; | ||
86 | */ | ||
87 | |||
88 | #ifndef SPEEX_DISABLE_ENCODER | ||
89 | void speex_init_header(SpeexHeader *header, int rate, int nb_channels, const SpeexMode *m) | ||
90 | { | ||
91 | int i; | ||
92 | const char *h="Speex "; | ||
93 | /* | ||
94 | strncpy(header->speex_string, "Speex ", 8); | ||
95 | strncpy(header->speex_version, SPEEX_VERSION, SPEEX_HEADER_VERSION_LENGTH-1); | ||
96 | header->speex_version[SPEEX_HEADER_VERSION_LENGTH-1]=0; | ||
97 | */ | ||
98 | for (i=0;i<8;i++) | ||
99 | header->speex_string[i]=h[i]; | ||
100 | for (i=0;i<SPEEX_HEADER_VERSION_LENGTH-1 && SPEEX_VERSION[i];i++) | ||
101 | header->speex_version[i]=SPEEX_VERSION[i]; | ||
102 | for (;i<SPEEX_HEADER_VERSION_LENGTH;i++) | ||
103 | header->speex_version[i]=0; | ||
104 | |||
105 | header->speex_version_id = 1; | ||
106 | header->header_size = sizeof(SpeexHeader); | ||
107 | |||
108 | header->rate = rate; | ||
109 | header->mode = m->modeID; | ||
110 | header->mode_bitstream_version = m->bitstream_version; | ||
111 | if (m->modeID<0) | ||
112 | speex_warning("This mode is meant to be used alone"); | ||
113 | header->nb_channels = nb_channels; | ||
114 | header->bitrate = -1; | ||
115 | speex_mode_query(m, SPEEX_MODE_FRAME_SIZE, &header->frame_size); | ||
116 | header->vbr = 0; | ||
117 | |||
118 | header->frames_per_packet = 0; | ||
119 | header->extra_headers = 0; | ||
120 | header->reserved1 = 0; | ||
121 | header->reserved2 = 0; | ||
122 | } | ||
123 | |||
124 | char *speex_header_to_packet(SpeexHeader *header, int *size) | ||
125 | { | ||
126 | SpeexHeader *le_header; | ||
127 | le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader)); | ||
128 | |||
129 | SPEEX_COPY(le_header, header, 1); | ||
130 | |||
131 | /*Make sure everything is now little-endian*/ | ||
132 | ENDIAN_SWITCH(le_header->speex_version_id); | ||
133 | ENDIAN_SWITCH(le_header->header_size); | ||
134 | ENDIAN_SWITCH(le_header->rate); | ||
135 | ENDIAN_SWITCH(le_header->mode); | ||
136 | ENDIAN_SWITCH(le_header->mode_bitstream_version); | ||
137 | ENDIAN_SWITCH(le_header->nb_channels); | ||
138 | ENDIAN_SWITCH(le_header->bitrate); | ||
139 | ENDIAN_SWITCH(le_header->frame_size); | ||
140 | ENDIAN_SWITCH(le_header->vbr); | ||
141 | ENDIAN_SWITCH(le_header->frames_per_packet); | ||
142 | ENDIAN_SWITCH(le_header->extra_headers); | ||
143 | |||
144 | *size = sizeof(SpeexHeader); | ||
145 | return (char *)le_header; | ||
146 | } | ||
147 | #endif /* SPEEX_DISABLE_ENCODER */ | ||
148 | |||
149 | static SpeexHeader global_le_header; /* Avoid malloc */ | ||
150 | SpeexHeader *speex_packet_to_header(char *packet, int size) | ||
151 | { | ||
152 | int i; | ||
153 | SpeexHeader *le_header = &global_le_header; | ||
154 | const char *h = "Speex "; | ||
155 | for (i=0;i<8;i++) | ||
156 | if (packet[i]!=h[i]) | ||
157 | { | ||
158 | speex_notify("This doesn't look like a Speex file"); | ||
159 | return NULL; | ||
160 | } | ||
161 | |||
162 | /*FIXME: Do we allow larger headers?*/ | ||
163 | if (size < (int)sizeof(SpeexHeader)) | ||
164 | { | ||
165 | speex_notify("Speex header too small"); | ||
166 | return NULL; | ||
167 | } | ||
168 | |||
169 | /* le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader)); */ | ||
170 | |||
171 | SPEEX_COPY(le_header, (SpeexHeader*)packet, 1); | ||
172 | |||
173 | /*Make sure everything is converted correctly from little-endian*/ | ||
174 | ENDIAN_SWITCH(le_header->speex_version_id); | ||
175 | ENDIAN_SWITCH(le_header->header_size); | ||
176 | ENDIAN_SWITCH(le_header->rate); | ||
177 | ENDIAN_SWITCH(le_header->mode); | ||
178 | ENDIAN_SWITCH(le_header->mode_bitstream_version); | ||
179 | ENDIAN_SWITCH(le_header->nb_channels); | ||
180 | ENDIAN_SWITCH(le_header->bitrate); | ||
181 | ENDIAN_SWITCH(le_header->frame_size); | ||
182 | ENDIAN_SWITCH(le_header->vbr); | ||
183 | ENDIAN_SWITCH(le_header->frames_per_packet); | ||
184 | ENDIAN_SWITCH(le_header->extra_headers); | ||
185 | |||
186 | return le_header; | ||
187 | |||
188 | } | ||