mirror of
https://github.com/nzp-team/fteqw.git
synced 2024-11-26 22:01:50 +00:00
e6993268bf
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@2092 fc73d0e0-1445-4013-8a0c-d673dee63da5
319 lines
7.6 KiB
C
319 lines
7.6 KiB
C
#include "quakedef.h"
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#ifdef AVAIL_OGGVORBIS
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#include <vorbis/vorbisfile.h>
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#if defined(_WIN32)
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#define WINDOWSDYNAMICLINK
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#include <windows.h>
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HINSTANCE oggvorbislibrary;
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#else
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#include <dlfcn.h>
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void *oggvorbislibrary;
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#endif
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int (VARGS *p_ov_open_callbacks) (void *datasource, OggVorbis_File *vf, char *initial, long ibytes, ov_callbacks callbacks);
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int (VARGS *p_ov_clear)(OggVorbis_File *vf);
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vorbis_info *(VARGS *p_ov_info)(OggVorbis_File *vf,int link);
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vorbis_comment *(VARGS *p_ov_comment) (OggVorbis_File *vf,int link);
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ogg_int64_t (VARGS *p_ov_pcm_total)(OggVorbis_File *vf,int i);
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long (VARGS *p_ov_read)(OggVorbis_File *vf,char *buffer,int length,
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int bigendianp,int word,int sgned,int *bitstream);
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typedef struct {
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unsigned char *start; //file positions
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unsigned long length;
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unsigned long pos;
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int srcspeed;
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qboolean failed;
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sfxcache_t mediasc;
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char *mediaaswavdata;
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int mediaaswavpos;
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int mediaaswavbuflen;
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OggVorbis_File vf;
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sfx_t *s;
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} ovdecoderbuffer_t;
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int OV_DecodeSome(sfx_t *s, int minlength);
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void OV_CancelDecoder(sfx_t *s);
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qboolean OV_StartDecode(unsigned char *start, unsigned long length, ovdecoderbuffer_t *buffer);
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qbyte *COM_LoadFile (char *path, int usehunk);
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sfxcache_t *S_LoadOVSound (sfx_t *s, qbyte *data, int datalen, int sndspeed)
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{
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//char namebuffer[MAX_OSPATH]; //unreferenced
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char *name;
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ovdecoderbuffer_t *buffer;
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//FILE *f; //unreferenced
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//qboolean telluser; //unreferenced
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//int len; //unreferenced
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name = s->name;
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if (!s->decoder)
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s->decoder = Z_Malloc(sizeof(ovdecoderbuffer_t) + sizeof(sfxdecode_t));
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buffer = (ovdecoderbuffer_t*)(s->decoder+1);
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buffer->mediaaswavpos=0;
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buffer->mediasc.length=0;
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buffer->s = s;
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s->decoder->buf = buffer;
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s->decoder->decodemore = OV_DecodeSome;
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s->decoder->abort = OV_CancelDecoder;
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if (!OV_StartDecode(data, datalen, buffer))
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{
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if (buffer->mediaaswavdata)
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{
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BZ_Free(buffer->mediaaswavdata);
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buffer->mediaaswavdata=NULL;
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}
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Z_Free(s->decoder);
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s->decoder=NULL;
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return NULL;
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}
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buffer->mediaaswavpos = sizeof(sfxcache_t);
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s->decoder->decodemore(s, 100);
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s->cache.fake=true;
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return buffer->s->cache.data;
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}
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int OV_DecodeSome(sfx_t *s, int minlength)
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{
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extern int snd_speed;
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int i;
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int bigendianp = 0;
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int current_section = 0;
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sfxcache_t *sc;
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ovdecoderbuffer_t *dec = s->decoder->buf;
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int bytesread;
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// Con_Printf("Minlength = %03i ", minlength);
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if (dec->mediaaswavbuflen < dec->mediaaswavpos+minlength+11050) //expand if needed.
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{
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// Con_Printf("Expand buffer\n");
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dec->mediaaswavbuflen += minlength+22100;
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dec->mediaaswavdata = BZ_Realloc(dec->mediaaswavdata, dec->mediaaswavbuflen);
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s->cache.data = dec->mediaaswavdata;
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s->cache.fake = true;
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sc = s->cache.data;
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sc->numchannels = dec->mediasc.numchannels;
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sc->loopstart = -1;
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}
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else
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sc = s->cache.data;
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if (minlength < sc->length)
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{
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// Con_Printf("No need for decode\n");
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//done enough for now, don't whizz through the lot
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return 0;
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}
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for (;;)
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{
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bytesread = p_ov_read(&dec->vf, dec->mediaaswavdata+dec->mediaaswavpos, dec->mediaaswavbuflen-dec->mediaaswavpos, bigendianp, 2, 1, ¤t_section);
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if (bytesread <= 0)
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{
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Con_Printf("ogg decoding failed\n");
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return 0;
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}
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if (snd_speed != dec->srcspeed)
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{ //resample
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if (dec->mediasc.numchannels==2)
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{
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int *data = (int*)(dec->mediaaswavdata+dec->mediaaswavpos);
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float frac = (float)dec->srcspeed/snd_speed;
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bytesread = (int)(bytesread/frac);
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for(i = 0; i < bytesread/4; i++)
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data[i] = data[(int)(i*frac)];
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}
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else
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{
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}
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}
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dec->mediaaswavpos += bytesread;
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sc->length = (dec->mediaaswavpos-sizeof(sfxcache_t))/(2*(dec->mediasc.numchannels));
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dec->mediasc.length = sc->length;
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if (minlength<=sc->length)
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{
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// Con_Printf("Reached length\n");
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return 1;
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}
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}
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}
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void OV_CancelDecoder(sfx_t *s)
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{
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sfxcache_t *src, *dest;
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ovdecoderbuffer_t *dec;
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dec = s->decoder->buf;
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p_ov_clear (&dec->vf); //close the decoder
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//copy to new buffer
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src = s->cache.data;
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s->cache.fake = false;
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s->cache.data = NULL;
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dest = Cache_Alloc(&s->cache, dec->mediaaswavpos, s->name);
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memcpy(dest, src, dec->mediaaswavpos);
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BZ_Free(src);
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Z_Free(s->decoder);
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s->decoder = NULL;
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//and it's now indistinguisable from a wav
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}
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static size_t read_func (void *ptr, size_t size, size_t nmemb, void *datasource)
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{
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ovdecoderbuffer_t *buffer = datasource;
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int spare = buffer->length - buffer->pos;
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if (size*nmemb > spare)
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nmemb = spare / size;
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memcpy(ptr, &buffer->start[buffer->pos], size*nmemb);
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buffer->pos += size*nmemb;
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return nmemb;
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}
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static int seek_func (void *datasource, ogg_int64_t offset, int whence)
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{
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ovdecoderbuffer_t *buffer = datasource;
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switch(whence)
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{
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case SEEK_SET:
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buffer->pos = offset;
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break;
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case SEEK_END:
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buffer->pos = buffer->length+offset;
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break;
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case SEEK_CUR:
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buffer->pos+=offset;
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break;
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}
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return 0;
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}
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static int close_func (void *datasource)
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{
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ovdecoderbuffer_t *buffer = datasource;
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BZ_Free(buffer->start);
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buffer->start=0;
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return 0;
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}
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static long tell_func (void *datasource)
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{
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ovdecoderbuffer_t *buffer = datasource;
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return buffer->pos;
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}
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static ov_callbacks callbacks = {
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read_func,
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seek_func,
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close_func,
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tell_func,
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};
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qboolean OV_StartDecode(unsigned char *start, unsigned long length, ovdecoderbuffer_t *buffer)
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{
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static qboolean tried;
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if (!oggvorbislibrary && !tried)
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#ifdef WINDOWSDYNAMICLINK
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{
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tried = true;
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oggvorbislibrary = LoadLibrary("vorbisfile.dll");
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if (!oggvorbislibrary)
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{
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Con_Printf("Couldn't load DLL: \"vorbisfile.dll\".\n");
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return false;
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}
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p_ov_open_callbacks = (void *)GetProcAddress(oggvorbislibrary, "ov_open_callbacks");
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p_ov_comment = (void *)GetProcAddress(oggvorbislibrary, "ov_comment");
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p_ov_pcm_total = (void *)GetProcAddress(oggvorbislibrary, "ov_pcm_total");
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p_ov_clear = (void *)GetProcAddress(oggvorbislibrary, "ov_clear");
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p_ov_info = (void *)GetProcAddress(oggvorbislibrary, "ov_info");
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p_ov_read = (void *)GetProcAddress(oggvorbislibrary, "ov_read");
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}
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#else
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{
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tried = true;
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oggvorbislibrary = dlopen("libvorbisfile.so", RTLD_LOCAL | RTLD_LAZY);
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if (!oggvorbislibrary)
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{
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Con_Printf("Couldn't load DLL: \"vorbisfile.dll\".\n");
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return false;
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}
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p_ov_open_callbacks = (void *)dlsym(oggvorbislibrary, "ov_open_callbacks");
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p_ov_comment = (void *)dlsym(oggvorbislibrary, "ov_comment");
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p_ov_pcm_total = (void *)dlsym(oggvorbislibrary, "ov_pcm_total");
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p_ov_clear = (void *)dlsym(oggvorbislibrary, "ov_clear");
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p_ov_info = (void *)dlsym(oggvorbislibrary, "ov_info");
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p_ov_read = (void *)dlsym(oggvorbislibrary, "ov_read");
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}
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#endif
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if (!oggvorbislibrary)
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return false;
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buffer->start = start;
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buffer->length = length;
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buffer->pos = 0;
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if (p_ov_open_callbacks(buffer, &buffer->vf, NULL, 0, callbacks))
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{
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// Con_Printf("Input does not appear to be an Ogg bitstream.\n");
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return false;
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}
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/* Print the comments plus a few lines about the bitstream we're
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decoding */
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{
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// char **ptr=p_ov_comment(&buffer->vf,-1)->user_comments;
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vorbis_info *vi=p_ov_info(&buffer->vf,-1);
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if (vi->channels < 1 || vi->channels > 2)
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{
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p_ov_clear (&buffer->vf);
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return false;
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}
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buffer->mediasc.numchannels = vi->channels;
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buffer->mediasc.loopstart = -1;
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buffer->srcspeed = vi->rate;
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/*
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while(*ptr){
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Con_Printf("%s\n",*ptr);
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ptr++;
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}
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Con_Printf("\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
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Con_Printf("\nDecoded length: %ld samples\n",
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(long)p_ov_pcm_total(&buffer->vf,-1));
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Con_Printf("Encoded by: %s\n\n",p_ov_comment(&buffer->vf,-1)->vendor);
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*/ }
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buffer->start = BZ_Malloc(length);
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memcpy(buffer->start, start, length);
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return true;
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}
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#endif
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