diff options
Diffstat (limited to 'apps/codecs/libwavpack/metadata.c')
-rw-r--r-- | apps/codecs/libwavpack/metadata.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/apps/codecs/libwavpack/metadata.c b/apps/codecs/libwavpack/metadata.c new file mode 100644 index 0000000000..40ede99cd4 --- /dev/null +++ b/apps/codecs/libwavpack/metadata.c | |||
@@ -0,0 +1,105 @@ | |||
1 | //////////////////////////////////////////////////////////////////////////// | ||
2 | // **** WAVPACK **** // | ||
3 | // Hybrid Lossless Wavefile Compressor // | ||
4 | // Copyright (c) 1998 - 2003 Conifer Software. // | ||
5 | // All Rights Reserved. // | ||
6 | // Distributed under the BSD Software License (see license.txt) // | ||
7 | //////////////////////////////////////////////////////////////////////////// | ||
8 | |||
9 | // metadata.c | ||
10 | |||
11 | // This module handles the metadata structure introduced in WavPack 4.0 | ||
12 | |||
13 | #include "wavpack.h" | ||
14 | |||
15 | int read_metadata_buff (WavpackContext *wpc, WavpackMetadata *wpmd) | ||
16 | { | ||
17 | uchar tchar; | ||
18 | |||
19 | if (!wpc->infile (&wpmd->id, 1) || !wpc->infile (&tchar, 1)) | ||
20 | return FALSE; | ||
21 | |||
22 | wpmd->byte_length = tchar << 1; | ||
23 | |||
24 | if (wpmd->id & ID_LARGE) { | ||
25 | wpmd->id &= ~ID_LARGE; | ||
26 | |||
27 | if (!wpc->infile (&tchar, 1)) | ||
28 | return FALSE; | ||
29 | |||
30 | wpmd->byte_length += (long) tchar << 9; | ||
31 | |||
32 | if (!wpc->infile (&tchar, 1)) | ||
33 | return FALSE; | ||
34 | |||
35 | wpmd->byte_length += (long) tchar << 17; | ||
36 | } | ||
37 | |||
38 | if (wpmd->id & ID_ODD_SIZE) { | ||
39 | wpmd->id &= ~ID_ODD_SIZE; | ||
40 | wpmd->byte_length--; | ||
41 | } | ||
42 | |||
43 | if (wpmd->byte_length && wpmd->byte_length <= sizeof (wpc->read_buffer)) { | ||
44 | ulong bytes_to_read = wpmd->byte_length + (wpmd->byte_length & 1); | ||
45 | |||
46 | if (wpc->infile (wpc->read_buffer, bytes_to_read) != (long) bytes_to_read) { | ||
47 | wpmd->data = NULL; | ||
48 | return FALSE; | ||
49 | } | ||
50 | |||
51 | wpmd->data = wpc->read_buffer; | ||
52 | } | ||
53 | else | ||
54 | wpmd->data = NULL; | ||
55 | |||
56 | return TRUE; | ||
57 | } | ||
58 | |||
59 | int process_metadata (WavpackContext *wpc, WavpackMetadata *wpmd) | ||
60 | { | ||
61 | WavpackStream *wps = &wpc->stream; | ||
62 | |||
63 | switch (wpmd->id) { | ||
64 | case ID_DUMMY: | ||
65 | return TRUE; | ||
66 | |||
67 | case ID_DECORR_TERMS: | ||
68 | return read_decorr_terms (wps, wpmd); | ||
69 | |||
70 | case ID_DECORR_WEIGHTS: | ||
71 | return read_decorr_weights (wps, wpmd); | ||
72 | |||
73 | case ID_DECORR_SAMPLES: | ||
74 | return read_decorr_samples (wps, wpmd); | ||
75 | |||
76 | case ID_ENTROPY_VARS: | ||
77 | return read_entropy_vars (wps, wpmd); | ||
78 | |||
79 | case ID_HYBRID_PROFILE: | ||
80 | return read_hybrid_profile (wps, wpmd); | ||
81 | |||
82 | case ID_FLOAT_INFO: | ||
83 | return read_float_info (wps, wpmd); | ||
84 | |||
85 | case ID_INT32_INFO: | ||
86 | return read_int32_info (wps, wpmd); | ||
87 | |||
88 | case ID_CHANNEL_INFO: | ||
89 | return read_channel_info (wpc, wpmd); | ||
90 | |||
91 | case ID_CONFIG_BLOCK: | ||
92 | return read_config_info (wpc, wpmd); | ||
93 | |||
94 | case ID_WV_BITSTREAM: | ||
95 | return init_wv_bitstream (wpc, wpmd); | ||
96 | |||
97 | case ID_SHAPING_WEIGHTS: | ||
98 | case ID_WVC_BITSTREAM: | ||
99 | case ID_WVX_BITSTREAM: | ||
100 | return TRUE; | ||
101 | |||
102 | default: | ||
103 | return (wpmd->id & ID_OPTIONAL_DATA) ? TRUE : FALSE; | ||
104 | } | ||
105 | } | ||