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)
40 #define qModPlug_Load ModPlug_Load
41 #define qModPlug_Unload ModPlug_Unload
42 #define qModPlug_Read ModPlug_Read
43 #define qModPlug_Seek ModPlug_Seek
44 #define qModPlug_GetSettings ModPlug_GetSettings
45 #define qModPlug_SetSettings ModPlug_SetSettings
46 #define qModPlug_SetMasterVolume ModPlug_SetMasterVolume
49 // BEGIN SECTION FROM modplug.h
52 * This source code is public domain.
54 * Authors: Kenton Varda <temporal@gauge3d.org> (C interface wrapper)
59 MODPLUG_ENABLE_OVERSAMPLING = 1 << 0, /* Enable oversampling (*highly* recommended) */
60 MODPLUG_ENABLE_NOISE_REDUCTION = 1 << 1, /* Enable noise reduction */
61 MODPLUG_ENABLE_REVERB = 1 << 2, /* Enable reverb */
62 MODPLUG_ENABLE_MEGABASS = 1 << 3, /* Enable megabass */
63 MODPLUG_ENABLE_SURROUND = 1 << 4 /* Enable surround sound. */
66 enum _ModPlug_ResamplingMode
68 MODPLUG_RESAMPLE_NEAREST = 0, /* No interpolation (very fast, extremely bad sound quality) */
69 MODPLUG_RESAMPLE_LINEAR = 1, /* Linear interpolation (fast, good quality) */
70 MODPLUG_RESAMPLE_SPLINE = 2, /* Cubic spline interpolation (high quality) */
71 MODPLUG_RESAMPLE_FIR = 3 /* 8-tap fir filter (extremely high quality) */
74 typedef struct _ModPlug_Settings
76 int mFlags; /* One or more of the MODPLUG_ENABLE_* flags above, bitwise-OR'ed */
78 /* Note that ModPlug always decodes sound at 44100kHz, 32 bit, stereo and then
79 * down-mixes to the settings you choose. */
80 int mChannels; /* Number of channels - 1 for mono or 2 for stereo */
81 int mBits; /* Bits per sample - 8, 16, or 32 */
82 int mFrequency; /* Sampling rate - 11025, 22050, or 44100 */
83 int mResamplingMode; /* One of MODPLUG_RESAMPLE_*, above */
85 int mStereoSeparation; /* Stereo separation, 1 - 256 */
86 int mMaxMixChannels; /* Maximum number of mixing channels (polyphony), 32 - 256 */
88 int mReverbDepth; /* Reverb level 0(quiet)-100(loud) */
89 int mReverbDelay; /* Reverb delay in ms, usually 40-200ms */
90 int mBassAmount; /* XBass level 0(quiet)-100(loud) */
91 int mBassRange; /* XBass cutoff in Hz 10-100 */
92 int mSurroundDepth; /* Surround level 0(quiet)-100(heavy) */
93 int mSurroundDelay; /* Surround delay in ms, usually 5-40ms */
94 int mLoopCount; /* Number of times to loop. Zero prevents looping.
99 typedef struct _ModPlugFile ModPlugFile;
101 // END SECTION FROM modplug.h
103 static ModPlugFile* (*qModPlug_Load) (const void* data, int size);
104 static void (*qModPlug_Unload) (ModPlugFile* file);
105 static int (*qModPlug_Read) (ModPlugFile* file, void* buffer, int size);
106 static void (*qModPlug_Seek) (ModPlugFile* file, int millisecond);
107 static void (*qModPlug_GetSettings) (ModPlug_Settings* settings);
108 static void (*qModPlug_SetSettings) (const ModPlug_Settings* settings);
109 typedef void (ModPlug_SetMasterVolume_t) (ModPlugFile* file,unsigned int cvol) ;
110 ModPlug_SetMasterVolume_t *qModPlug_SetMasterVolume;
113 static dllfunction_t modplugfuncs[] =
115 {"ModPlug_Load", (void **) &qModPlug_Load},
116 {"ModPlug_Unload", (void **) &qModPlug_Unload},
117 {"ModPlug_Read", (void **) &qModPlug_Read},
118 {"ModPlug_Seek", (void **) &qModPlug_Seek},
119 {"ModPlug_GetSettings", (void **) &qModPlug_GetSettings},
120 {"ModPlug_SetSettings", (void **) &qModPlug_SetSettings},
124 // Handles for the modplug and modplugfile DLLs
125 static dllhandle_t modplug_dll = NULL;
128 =================================================================
132 =================================================================
139 Try to load the modplugFile DLL
142 qboolean ModPlug_OpenLibrary (void)
144 const char* dllnames_modplug [] =
149 #elif defined(MACOSX)
162 // COMMANDLINEOPTION: Sound: -nomodplug disables modplug sound support
163 if (COM_CheckParm("-nomodplug"))
167 // We need to load both by hand because some OSes seem to not load
168 // the modplug DLL automatically when loading the modplugFile DLL
169 if(Sys_LoadLibrary (dllnames_modplug, &modplug_dll, modplugfuncs))
171 qModPlug_SetMasterVolume = (ModPlug_SetMasterVolume_t *) Sys_GetProcAddress(modplug_dll, "ModPlug_SetMasterVolume");
172 if(!qModPlug_SetMasterVolume)
173 Con_Print("Warning: modplug volume control not supported. Try getting a newer version of libmodplug.\n");
185 Unload the modplugFile DLL
188 void ModPlug_CloseLibrary (void)
190 Sys_UnloadLibrary (&modplug_dll);
196 =================================================================
200 =================================================================
203 // Per-sfx data structure
209 unsigned int total_length;
212 } modplug_stream_persfx_t;
214 // Per-channel data structure
218 unsigned int sb_offset;
220 snd_buffer_t sb; // must be at the end due to its dynamically allocated size
221 } modplug_stream_perchannel_t;
229 static const snd_buffer_t* ModPlug_FetchSound (void *sfxfetcher, void **chfetcherpointer, unsigned int *start, unsigned int nbsampleframes)
231 modplug_stream_perchannel_t* per_ch = (modplug_stream_perchannel_t *)*chfetcherpointer;
232 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfxfetcher;
234 int newlength, done, ret;
235 unsigned int real_start;
238 // If there's no fetcher structure attached to the channel yet
241 size_t buff_len, memsize;
242 snd_format_t sb_format;
244 sb_format.speed = snd_renderbuffer->format.speed;
245 sb_format.width = per_sfx->format.width;
246 sb_format.channels = per_sfx->format.channels;
248 buff_len = STREAM_BUFFER_SIZE(&sb_format);
249 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
250 per_ch = (modplug_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
252 // Open it with the modplugFile API
253 per_ch->mf = qModPlug_Load(per_sfx->file, per_sfx->filesize);
256 Con_Printf("error while reading ModPlug stream \"%s\"\n", per_sfx->name);
261 #ifndef SND_MODPLUG_STATIC
262 if(qModPlug_SetMasterVolume)
264 qModPlug_SetMasterVolume(per_ch->mf, 512); // max volume, DP scales down!
268 per_ch->sb_offset = 0;
269 per_ch->sb.format = sb_format;
270 per_ch->sb.nbframes = 0;
271 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
273 *chfetcherpointer = per_ch;
279 factor = per_sfx->format.width * per_sfx->format.channels;
281 // If the stream buffer can't contain that much samples anyway
282 if (nbsampleframes > sb->maxframes)
284 Con_Printf ("ModPlug_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
288 // If the data we need has already been decompressed in the sfxbuffer, just return it
289 if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
291 *start = per_ch->sb_offset;
295 newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
297 // If we need to skip some data before decompressing the rest, or if the stream has looped
298 if (newlength < 0 || per_ch->sb_offset > real_start)
300 unsigned int time_start;
301 unsigned int modplug_start;
304 MODs loop on their own, so any position is valid!
305 if (real_start > (unsigned int)per_sfx->total_length)
307 Con_Printf ("ModPlug_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
308 real_start, per_sfx->total_length);
313 // We work with 200ms (1/5 sec) steps to avoid rounding errors
314 time_start = real_start * 5 / snd_renderbuffer->format.speed;
315 modplug_start = time_start * (1000 / 5);
317 Con_DPrintf("warning: mod file needed to seek (to %d)\n", modplug_start);
319 qModPlug_Seek(per_ch->mf, modplug_start);
322 real_start = (unsigned int) ((float)modplug_start / 1000 * snd_renderbuffer->format.speed);
323 if (*start - real_start + nbsampleframes > sb->maxframes)
325 Con_Printf ("ModPlug_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
326 *start - real_start + nbsampleframes);
327 per_ch->sb_offset = real_start;
331 // Else, move forward the samples we need to keep in the sound buffer
334 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
335 sb->nbframes = newlength;
338 per_ch->sb_offset = real_start;
340 // We add more than one frame of sound to the buffer:
341 // 1- to ensure we won't lose many samples during the resampling process
342 // 2- to reduce calls to ModPlug_FetchSound to regulate workload
343 newlength = (int)(per_sfx->format.speed*STREAM_BUFFER_FILL);
344 if ((size_t) ((double) newlength * (double)sb->format.speed / (double)per_sfx->format.speed) + sb->nbframes > sb->maxframes)
346 Con_Printf ("ModPlug_FetchSound: stream buffer overflow (%u + %u = %u sample frames / %u)\n",
347 (unsigned int) ((double) newlength * (double)sb->format.speed / (double)per_sfx->format.speed), sb->nbframes, (unsigned int) ((double) newlength * (double)sb->format.speed / (double)per_sfx->format.speed) + sb->nbframes, sb->maxframes);
350 newlength *= factor; // convert from sample frames to bytes
351 if(newlength > (int)sizeof(resampling_buffer))
352 newlength = sizeof(resampling_buffer);
354 // Decompress in the resampling_buffer
356 while ((ret = qModPlug_Read (per_ch->mf, (char *)&resampling_buffer[done], (int)(newlength - done))) > 0)
360 // Argh. We didn't get as many samples as we wanted. Probably
361 // libmodplug forgot what mLoopCount==-1 means... basically, this means
362 // we can't loop like this. Try to let DP fix it later...
363 per_sfx->sfx->total_length = (real_start + ((size_t)done / (size_t)factor));
364 per_sfx->sfx->loopstart = 0;
366 if(newlength != done)
367 Con_DPrintf("ModPlug_Fetch: wanted: %d, got: %d\n", newlength, done);
370 Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
372 *start = per_ch->sb_offset;
382 static void ModPlug_FetchEnd (void *chfetcherdata)
384 modplug_stream_perchannel_t* per_ch = (modplug_stream_perchannel_t *)chfetcherdata;
388 // Free the modplug decoder
389 qModPlug_Unload (per_ch->mf);
401 static void ModPlug_FreeSfx (void *sfxfetcherdata)
403 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfxfetcherdata;
405 // Free the modplug file
406 Mem_Free(per_sfx->file);
408 // Free the stream structure
418 static const snd_format_t* qModPlug_GetFormat (sfx_t* sfx)
420 modplug_stream_persfx_t* per_sfx = (modplug_stream_persfx_t *)sfx->fetcher_data;
421 return &per_sfx->format;
424 static const snd_fetcher_t modplug_fetcher = { ModPlug_FetchSound, ModPlug_FetchEnd, ModPlug_FreeSfx, qModPlug_GetFormat };
429 ModPlug_LoadmodplugFile
431 Load an modplug file into memory
434 qboolean ModPlug_LoadModPlugFile (const char *filename, sfx_t *sfx)
437 fs_offset_t filesize;
439 modplug_stream_persfx_t* per_sfx;
446 if (sfx->fetcher != NULL)
450 data = FS_LoadFile (filename, snd_mempool, false, &filesize);
454 if (developer_loading.integer >= 2)
455 Con_Printf ("Loading ModPlug file \"%s\"\n", filename);
457 qModPlug_GetSettings(&s);
458 s.mFlags = MODPLUG_ENABLE_OVERSAMPLING | MODPLUG_ENABLE_NOISE_REDUCTION | MODPLUG_ENABLE_REVERB;
461 s.mFrequency = 44100;
462 s.mResamplingMode = MODPLUG_RESAMPLE_SPLINE;
464 qModPlug_SetSettings(&s);
466 // Open it with the modplugFile API
467 if (!(mf = qModPlug_Load (data, filesize)))
469 Con_Printf ("error while opening ModPlug file \"%s\"\n", filename);
474 #ifndef SND_MODPLUG_STATIC
475 if(qModPlug_SetMasterVolume)
477 qModPlug_SetMasterVolume(mf, 512); // max volume, DP scales down!
479 if (developer_loading.integer >= 2)
480 Con_Printf ("\"%s\" will be streamed\n", filename);
481 per_sfx = (modplug_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
482 strlcpy(per_sfx->name, sfx->name, sizeof(per_sfx->name));
483 sfx->memsize += sizeof (*per_sfx);
484 per_sfx->file = data;
485 per_sfx->filesize = filesize;
486 sfx->memsize += filesize;
488 per_sfx->format.speed = 44100; // modplug always works at that rate
489 per_sfx->format.width = 2; // We always work with 16 bits samples
490 per_sfx->format.channels = 2; // stereo rulez ;) (MAYBE default to mono because Amiga MODs sound better then?)
493 sfx->fetcher_data = per_sfx;
494 sfx->fetcher = &modplug_fetcher;
495 sfx->flags |= SFXFLAG_STREAMED;
496 sfx->total_length = 2147384647; // they always loop
497 sfx->loopstart = sfx->total_length; // modplug does it