2 Copyright (C) 2003-2005 Mathieu Olivier
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to:
18 Free Software Foundation, Inc.
19 59 Temple Place - Suite 330
20 Boston, MA 02111-1307, USA
27 #include "snd_modplug.h"
29 #ifdef SND_MODPLUG_STATIC
31 #include <libmodplug/modplug.h>
32 qboolean ModPlug_OpenLibrary (void)
34 return true; // statically linked
36 void ModPlug_CloseLibrary (void)
42 // BEGIN SECTION FROM modplug.h
45 * This source code is public domain.
47 * Authors: Kenton Varda <temporal@gauge3d.org> (C interface wrapper)
52 MODPLUG_ENABLE_OVERSAMPLING = 1 << 0, /* Enable oversampling (*highly* recommended) */
53 MODPLUG_ENABLE_NOISE_REDUCTION = 1 << 1, /* Enable noise reduction */
54 MODPLUG_ENABLE_REVERB = 1 << 2, /* Enable reverb */
55 MODPLUG_ENABLE_MEGABASS = 1 << 3, /* Enable megabass */
56 MODPLUG_ENABLE_SURROUND = 1 << 4 /* Enable surround sound. */
59 enum _ModPlug_ResamplingMode
61 MODPLUG_RESAMPLE_NEAREST = 0, /* No interpolation (very fast, extremely bad sound quality) */
62 MODPLUG_RESAMPLE_LINEAR = 1, /* Linear interpolation (fast, good quality) */
63 MODPLUG_RESAMPLE_SPLINE = 2, /* Cubic spline interpolation (high quality) */
64 MODPLUG_RESAMPLE_FIR = 3 /* 8-tap fir filter (extremely high quality) */
67 typedef struct _ModPlug_Settings
69 int mFlags; /* One or more of the MODPLUG_ENABLE_* flags above, bitwise-OR'ed */
71 /* Note that ModPlug always decodes sound at 44100kHz, 32 bit, stereo and then
72 * down-mixes to the settings you choose. */
73 int mChannels; /* Number of channels - 1 for mono or 2 for stereo */
74 int mBits; /* Bits per sample - 8, 16, or 32 */
75 int mFrequency; /* Sampling rate - 11025, 22050, or 44100 */
76 int mResamplingMode; /* One of MODPLUG_RESAMPLE_*, above */
78 int mReverbDepth; /* Reverb level 0(quiet)-100(loud) */
79 int mReverbDelay; /* Reverb delay in ms, usually 40-200ms */
80 int mBassAmount; /* XBass level 0(quiet)-100(loud) */
81 int mBassRange; /* XBass cutoff in Hz 10-100 */
82 int mSurroundDepth; /* Surround level 0(quiet)-100(heavy) */
83 int mSurroundDelay; /* Surround delay in ms, usually 5-40ms */
84 int mLoopCount; /* Number of times to loop. Zero prevents looping.
89 typedef struct _ModPlugFile ModPlugFile;
91 // END SECTION FROM modplug.h
93 static ModPlugFile* (*ModPlug_Load) (const void* data, int size);
94 static void (*ModPlug_Unload) (ModPlugFile* file);
95 static int (*ModPlug_Read) (ModPlugFile* file, void* buffer, int size);
96 static void (*ModPlug_Seek) (ModPlugFile* file, int millisecond);
97 static void (*ModPlug_GetSettings) (ModPlug_Settings* settings);
98 static void (*ModPlug_SetSettings) (const ModPlug_Settings* settings);
99 typedef void (ModPlug_SetMasterVolume_t) (ModPlugFile* file,unsigned int cvol) ;
100 ModPlug_SetMasterVolume_t *ModPlug_SetMasterVolume;
103 static dllfunction_t modplugfuncs[] =
105 {"ModPlug_Load", (void **) &ModPlug_Load},
106 {"ModPlug_Unload", (void **) &ModPlug_Unload},
107 {"ModPlug_Read", (void **) &ModPlug_Read},
108 {"ModPlug_Seek", (void **) &ModPlug_Seek},
109 {"ModPlug_GetSettings", (void **) &ModPlug_GetSettings},
110 {"ModPlug_SetSettings", (void **) &ModPlug_SetSettings},
114 // Handles for the modplug and modplugfile DLLs
115 static dllhandle_t modplug_dll = NULL;
118 =================================================================
122 =================================================================
129 Try to load the modplugFile DLL
132 qboolean ModPlug_OpenLibrary (void)
134 const char* dllnames_modplug [] =
141 #elif defined(MACOSX)
154 // COMMANDLINEOPTION: Sound: -nomodplug disables modplug sound support
155 if (COM_CheckParm("-nomodplug"))
159 // We need to load both by hand because some OSes seem to not load
160 // the modplug DLL automatically when loading the modplugFile DLL
161 if(Sys_LoadLibrary (dllnames_modplug, &modplug_dll, modplugfuncs))
163 ModPlug_SetMasterVolume = (ModPlug_SetMasterVolume_t *) Sys_GetProcAddress(modplug_dll, "ModPlug_SetMasterVolume");
164 if(!ModPlug_SetMasterVolume)
165 Con_Print("Warning: modplug volume control not supported. Try getting a newer version of libmodplug.\n");
177 Unload the modplugFile DLL
180 void ModPlug_CloseLibrary (void)
182 Sys_UnloadLibrary (&modplug_dll);
188 =================================================================
192 =================================================================
195 #define STREAM_BUFFER_DURATION 1.5f // 1.5 sec
196 #define STREAM_BUFFER_SIZE(format_ptr) ((int)(ceil (STREAM_BUFFER_DURATION * ((format_ptr)->speed * (format_ptr)->width * (format_ptr)->channels))))
197 // We work with 1 sec sequences, so this buffer must be able to contain
198 // 1 sec of sound of the highest quality (48 KHz, 16 bit samples, stereo)
199 static unsigned char resampling_buffer [48000 * 2 * 2];
202 // Per-sfx data structure
208 unsigned int total_length;
211 } modplug_stream_persfx_t;
213 // Per-channel data structure
217 unsigned int sb_offset;
219 snd_buffer_t sb; // must be at the end due to its dynamically allocated size
220 } modplug_stream_perchannel_t;
228 static const snd_buffer_t* ModPlug_FetchSound (void *sfxfetcher, void **chfetcherpointer, unsigned int *start, unsigned int nbsampleframes)
230 modplug_stream_perchannel_t* per_ch = (modplug_stream_perchannel_t *)*chfetcherpointer;
231 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfxfetcher;
233 int newlength, done, ret;
234 unsigned int real_start;
237 // If there's no fetcher structure attached to the channel yet
240 size_t buff_len, memsize;
241 snd_format_t sb_format;
243 sb_format.speed = snd_renderbuffer->format.speed;
244 sb_format.width = per_sfx->format.width;
245 sb_format.channels = per_sfx->format.channels;
247 buff_len = STREAM_BUFFER_SIZE(&sb_format);
248 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
249 per_ch = (modplug_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
251 // Open it with the modplugFile API
252 per_ch->mf = ModPlug_Load(per_sfx->file, per_sfx->filesize);
255 Con_Printf("error while reading ModPlug stream \"%s\"\n", per_sfx->name);
260 #ifndef SND_MODPLUG_STATIC
261 if(ModPlug_SetMasterVolume)
263 ModPlug_SetMasterVolume(per_ch->mf, 512); // max volume, DP scales down!
267 per_ch->sb_offset = 0;
268 per_ch->sb.format = sb_format;
269 per_ch->sb.nbframes = 0;
270 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
272 *chfetcherpointer = per_ch;
278 factor = per_sfx->format.width * per_sfx->format.channels;
280 // If the stream buffer can't contain that much samples anyway
281 if (nbsampleframes > sb->maxframes)
283 Con_Printf ("ModPlug_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
287 // If the data we need has already been decompressed in the sfxbuffer, just return it
288 if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
290 *start = per_ch->sb_offset;
294 newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
296 // If we need to skip some data before decompressing the rest, or if the stream has looped
297 if (newlength < 0 || per_ch->sb_offset > real_start)
299 unsigned int time_start;
300 unsigned int modplug_start;
303 MODs loop on their own, so any position is valid!
304 if (real_start > (unsigned int)per_sfx->total_length)
306 Con_Printf ("ModPlug_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
307 real_start, per_sfx->total_length);
312 // We work with 200ms (1/5 sec) steps to avoid rounding errors
313 time_start = real_start * 5 / snd_renderbuffer->format.speed;
314 modplug_start = time_start * (1000 / 5);
316 Con_DPrintf("warning: mod file needed to seek (to %d)\n", modplug_start);
318 ModPlug_Seek(per_ch->mf, modplug_start);
321 real_start = (unsigned int) ((float)modplug_start / 1000 * snd_renderbuffer->format.speed);
322 if (*start - real_start + nbsampleframes > sb->maxframes)
324 Con_Printf ("ModPlug_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
325 *start - real_start + nbsampleframes);
326 per_ch->sb_offset = real_start;
330 // Else, move forward the samples we need to keep in the sound buffer
333 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
334 sb->nbframes = newlength;
337 per_ch->sb_offset = real_start;
339 // We add exactly 1 sec of sound to the buffer:
340 // 1- to ensure we won't lose any sample during the resampling process
341 // 2- to force one call to ModPlug_FetchSound per second to regulate the workload
342 if (sb->format.speed + sb->nbframes > sb->maxframes)
344 Con_Printf ("ModPlug_FetchSound: stream buffer overflow (%u sample frames / %u)\n",
345 sb->format.speed + sb->nbframes, sb->maxframes);
348 newlength = per_sfx->format.speed * factor; // -> 1 sec of sound before resampling
349 if(newlength > (int)sizeof(resampling_buffer))
350 newlength = sizeof(resampling_buffer);
352 // Decompress in the resampling_buffer
354 while ((ret = ModPlug_Read (per_ch->mf, (char *)&resampling_buffer[done], (int)(newlength - done))) > 0)
358 // Argh. We didn't get as many samples as we wanted. Probably
359 // libmodplug forgot what mLoopCount==-1 means... basically, this means
360 // we can't loop like this. Try to let DP fix it later...
361 per_sfx->sfx->total_length = (real_start + ((size_t)done / (size_t)factor));
362 per_sfx->sfx->loopstart = 0;
364 if(newlength != done)
365 Con_DPrintf("ModPlug_Fetch: wanted: %d, got: %d\n", newlength, done);
368 Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
370 *start = per_ch->sb_offset;
380 static void ModPlug_FetchEnd (void *chfetcherdata)
382 modplug_stream_perchannel_t* per_ch = (modplug_stream_perchannel_t *)chfetcherdata;
386 // Free the modplug decoder
387 ModPlug_Unload (per_ch->mf);
399 static void ModPlug_FreeSfx (void *sfxfetcherdata)
401 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfxfetcherdata;
403 // Free the modplug file
404 Mem_Free(per_sfx->file);
406 // Free the stream structure
416 static const snd_format_t* ModPlug_GetFormat (sfx_t* sfx)
418 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfx->fetcher_data;
419 return &per_sfx->format;
422 static const snd_fetcher_t modplug_fetcher = { ModPlug_FetchSound, ModPlug_FetchEnd, ModPlug_FreeSfx, ModPlug_GetFormat };
427 ModPlug_LoadmodplugFile
429 Load an modplug file into memory
432 qboolean ModPlug_LoadModPlugFile (const char *filename, sfx_t *sfx)
435 fs_offset_t filesize;
437 modplug_stream_persfx_t* per_sfx;
444 if (sfx->fetcher != NULL)
448 data = FS_LoadFile (filename, snd_mempool, false, &filesize);
452 if (developer_loading.integer >= 2)
453 Con_Printf ("Loading ModPlug file \"%s\"\n", filename);
455 ModPlug_GetSettings(&s);
456 s.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION | MODPLUG_ENABLE_REVERB;
459 s.mFrequency = 44100;
460 s.mResamplingMode = MODPLUG_RESAMPLE_SPLINE;
462 ModPlug_SetSettings(&s);
464 // Open it with the modplugFile API
465 if (!(mf = ModPlug_Load (data, filesize)))
467 Con_Printf ("error while opening ModPlug file \"%s\"\n", filename);
472 #ifndef SND_MODPLUG_STATIC
473 if(ModPlug_SetMasterVolume)
475 ModPlug_SetMasterVolume(mf, 512); // max volume, DP scales down!
477 if (developer_loading.integer >= 2)
478 Con_Printf ("\"%s\" will be streamed\n", filename);
479 per_sfx = (modplug_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
480 strlcpy(per_sfx->name, sfx->name, sizeof(per_sfx->name));
481 sfx->memsize += sizeof (*per_sfx);
482 per_sfx->file = data;
483 per_sfx->filesize = filesize;
484 sfx->memsize += filesize;
486 per_sfx->format.speed = 44100; // modplug always works at that rate
487 per_sfx->format.width = 2; // We always work with 16 bits samples
488 per_sfx->format.channels = 2; // stereo rulez ;) (MAYBE default to mono because Amiga MODs sound better then?)
491 sfx->fetcher_data = per_sfx;
492 sfx->fetcher = &modplug_fetcher;
493 sfx->flags |= SFXFLAG_STREAMED;
494 sfx->total_length = 2147384647; // they always loop
495 sfx->loopstart = sfx->total_length; // modplug does it