author | llornkcor <llornkcor> | 2003-04-08 02:56:00 (UTC) |
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committer | llornkcor <llornkcor> | 2003-04-08 02:56:00 (UTC) |
commit | 4e998346fbe802e534db9f04f63fd04e96ba9501 (patch) (unidiff) | |
tree | c969faf216b7f75613c4cabece3b1d3441fc39a7 /core/multimedia/opieplayer/vorbis/tremor/synthesis.c | |
parent | eee5531d24fdb17011debaa7acd42683330e55b6 (diff) | |
download | opie-4e998346fbe802e534db9f04f63fd04e96ba9501.zip opie-4e998346fbe802e534db9f04f63fd04e96ba9501.tar.gz opie-4e998346fbe802e534db9f04f63fd04e96ba9501.tar.bz2 |
vorbis lib and plugin for opieplayer1
Diffstat (limited to 'core/multimedia/opieplayer/vorbis/tremor/synthesis.c') (more/less context) (show whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/vorbis/tremor/synthesis.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/vorbis/tremor/synthesis.c b/core/multimedia/opieplayer/vorbis/tremor/synthesis.c new file mode 100644 index 0000000..0b93fee --- a/dev/null +++ b/core/multimedia/opieplayer/vorbis/tremor/synthesis.c | |||
@@ -0,0 +1,113 @@ | |||
1 | /******************************************************************** | ||
2 | * * | ||
3 | * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * | ||
4 | * * | ||
5 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * | ||
6 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * | ||
7 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * | ||
8 | * * | ||
9 | * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 * | ||
10 | * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * | ||
11 | * * | ||
12 | ******************************************************************** | ||
13 | |||
14 | function: single-block PCM synthesis | ||
15 | last mod: $Id$ | ||
16 | |||
17 | ********************************************************************/ | ||
18 | |||
19 | #include <stdio.h> | ||
20 | #include "ogg.h" | ||
21 | #include "ivorbiscodec.h" | ||
22 | #include "codec_internal.h" | ||
23 | #include "registry.h" | ||
24 | #include "misc.h" | ||
25 | #include "os.h" | ||
26 | |||
27 | int vorbis_synthesis(vorbis_block *vb,ogg_packet *op,int decodep){ | ||
28 | vorbis_dsp_state *vd=vb->vd; | ||
29 | private_state *b=(private_state *)vd->backend_state; | ||
30 | vorbis_info *vi=vd->vi; | ||
31 | codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; | ||
32 | oggpack_buffer *opb=&vb->opb; | ||
33 | int type,mode,i; | ||
34 | |||
35 | /* first things first. Make sure decode is ready */ | ||
36 | _vorbis_block_ripcord(vb); | ||
37 | oggpack_readinit(opb,op->packet); | ||
38 | |||
39 | /* Check the packet type */ | ||
40 | if(oggpack_read(opb,1)!=0){ | ||
41 | /* Oops. This is not an audio data packet */ | ||
42 | return(OV_ENOTAUDIO); | ||
43 | } | ||
44 | |||
45 | /* read our mode and pre/post windowsize */ | ||
46 | mode=oggpack_read(opb,b->modebits); | ||
47 | if(mode==-1)return(OV_EBADPACKET); | ||
48 | |||
49 | vb->mode=mode; | ||
50 | vb->W=ci->mode_param[mode]->blockflag; | ||
51 | if(vb->W){ | ||
52 | vb->lW=oggpack_read(opb,1); | ||
53 | vb->nW=oggpack_read(opb,1); | ||
54 | if(vb->nW==-1) return(OV_EBADPACKET); | ||
55 | }else{ | ||
56 | vb->lW=0; | ||
57 | vb->nW=0; | ||
58 | } | ||
59 | |||
60 | /* more setup */ | ||
61 | vb->granulepos=op->granulepos; | ||
62 | vb->sequence=op->packetno-3; /* first block is third packet */ | ||
63 | vb->eofflag=op->e_o_s; | ||
64 | |||
65 | if(decodep){ | ||
66 | /* alloc pcm passback storage */ | ||
67 | vb->pcmend=ci->blocksizes[vb->W]; | ||
68 | vb->pcm=(ogg_int32_t **)_vorbis_block_alloc(vb,sizeof(*vb->pcm)*vi->channels); | ||
69 | for(i=0;i<vi->channels;i++) | ||
70 | vb->pcm[i]=(ogg_int32_t *)_vorbis_block_alloc(vb,vb->pcmend*sizeof(*vb->pcm[i])); | ||
71 | |||
72 | /* unpack_header enforces range checking */ | ||
73 | type=ci->map_type[ci->mode_param[mode]->mapping]; | ||
74 | |||
75 | return(_mapping_P[type]->inverse(vb,b->mode[mode])); | ||
76 | }else{ | ||
77 | /* no pcm */ | ||
78 | vb->pcmend=0; | ||
79 | vb->pcm=NULL; | ||
80 | |||
81 | return(0); | ||
82 | } | ||
83 | } | ||
84 | |||
85 | long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op){ | ||
86 | codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; | ||
87 | oggpack_buffer opb; | ||
88 | int mode; | ||
89 | |||
90 | oggpack_readinit(&opb,op->packet); | ||
91 | |||
92 | /* Check the packet type */ | ||
93 | if(oggpack_read(&opb,1)!=0){ | ||
94 | /* Oops. This is not an audio data packet */ | ||
95 | return(OV_ENOTAUDIO); | ||
96 | } | ||
97 | |||
98 | { | ||
99 | int modebits=0; | ||
100 | int v=ci->modes; | ||
101 | while(v>1){ | ||
102 | modebits++; | ||
103 | v>>=1; | ||
104 | } | ||
105 | |||
106 | /* read our mode and pre/post windowsize */ | ||
107 | mode=oggpack_read(&opb,modebits); | ||
108 | } | ||
109 | if(mode==-1)return(OV_EBADPACKET); | ||
110 | return(ci->blocksizes[ci->mode_param[mode]->blockflag]); | ||
111 | } | ||
112 | |||
113 | |||