File: snd_mem.c

package info (click to toggle)
darkplaces 0~20180412~beta1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 18,200 kB
  • sloc: ansic: 176,886; makefile: 485; pascal: 455; perl: 372; objc: 245; sh: 102
file content (377 lines) | stat: -rw-r--r-- 10,418 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/


#include "quakedef.h"

#include "snd_main.h"
#include "snd_ogg.h"
#include "snd_wav.h"


/*
====================
Snd_CreateRingBuffer

If "buffer" is NULL, the function allocates one buffer of "sampleframes" sample frames itself
(if "sampleframes" is 0, the function chooses the size).
====================
*/
snd_ringbuffer_t *Snd_CreateRingBuffer (const snd_format_t* format, unsigned int sampleframes, void* buffer)
{
	snd_ringbuffer_t *ringbuffer;

	// If the caller provides a buffer, it must give us its size
	if (sampleframes == 0 && buffer != NULL)
		return NULL;

	ringbuffer = (snd_ringbuffer_t*)Mem_Alloc(snd_mempool, sizeof (*ringbuffer));
	memset(ringbuffer, 0, sizeof(*ringbuffer));
	memcpy(&ringbuffer->format, format, sizeof(ringbuffer->format));

	// If we haven't been given a buffer
	if (buffer == NULL)
	{
		unsigned int maxframes;
		size_t memsize;

		if (sampleframes == 0)
			maxframes = (format->speed + 1) / 2;  // Make the sound buffer large enough for containing 0.5 sec of sound
		else
			maxframes = sampleframes;

		memsize = maxframes * format->width * format->channels;
		ringbuffer->ring = (unsigned char *) Mem_Alloc(snd_mempool, memsize);
		ringbuffer->maxframes = maxframes;
	}
	else
	{
		ringbuffer->ring = (unsigned char *) buffer;
		ringbuffer->maxframes = sampleframes;
	}

	return ringbuffer;
}


/*
====================
Snd_CreateSndBuffer
====================
*/
snd_buffer_t *Snd_CreateSndBuffer (const unsigned char *samples, unsigned int sampleframes, const snd_format_t* in_format, unsigned int sb_speed)
{
	size_t newsampleframes, memsize;
	snd_buffer_t* sb;

	newsampleframes = (size_t) ceil((double)sampleframes * (double)sb_speed / (double)in_format->speed);

	memsize = newsampleframes * in_format->channels * in_format->width;
	memsize += sizeof (*sb) - sizeof (sb->samples);

	sb = (snd_buffer_t*)Mem_Alloc (snd_mempool, memsize);
	sb->format.channels = in_format->channels;
	sb->format.width = in_format->width;
	sb->format.speed = sb_speed;
	sb->maxframes = (unsigned int)newsampleframes;
	sb->nbframes = 0;

	if (!Snd_AppendToSndBuffer (sb, samples, sampleframes, in_format))
	{
		Mem_Free (sb);
		return NULL;
	}

	return sb;
}


/*
====================
Snd_AppendToSndBuffer
====================
*/
qboolean Snd_AppendToSndBuffer (snd_buffer_t* sb, const unsigned char *samples, unsigned int sampleframes, const snd_format_t* format)
{
	size_t srclength, outcount;
	unsigned char *out_data;

	//Con_DPrintf("ResampleSfx: %d samples @ %dHz -> %d samples @ %dHz\n",
	//			sampleframes, format->speed, outcount, sb->format.speed);

	// If the formats are incompatible
	if (sb->format.channels != format->channels || sb->format.width != format->width)
	{
		Con_Print("AppendToSndBuffer: incompatible sound formats!\n");
		return false;
	}

	outcount = (size_t) ((double)sampleframes * (double)sb->format.speed / (double)format->speed);

	// If the sound buffer is too short
	if (outcount > sb->maxframes - sb->nbframes)
	{
		Con_Print("AppendToSndBuffer: sound buffer too short!\n");
		return false;
	}

	out_data = &sb->samples[sb->nbframes * sb->format.width * sb->format.channels];
	srclength = sampleframes * format->channels;

	// Trivial case (direct transfer)
	if (format->speed == sb->format.speed)
	{
		if (format->width == 1)
		{
			size_t i;

			for (i = 0; i < srclength; i++)
				((signed char*)out_data)[i] = samples[i] - 128;
		}
		else  // if (format->width == 2)
			memcpy (out_data, samples, srclength * format->width);
	}

	// General case (linear interpolation with a fixed-point fractional
	// step, 18-bit integer part and 14-bit fractional part)
	// Can handle up to 2^18 (262144) samples per second (> 96KHz stereo)
#	define FRACTIONAL_BITS 14
#	define FRACTIONAL_MASK ((1 << FRACTIONAL_BITS) - 1)
#	define INTEGER_BITS (sizeof(samplefrac)*8 - FRACTIONAL_BITS)
	else
	{
		const unsigned int fracstep = (unsigned int)((double)format->speed / sb->format.speed * (1 << FRACTIONAL_BITS));
		size_t remain_in = srclength, total_out = 0;
		unsigned int samplefrac;
		const unsigned char *in_ptr = samples;
		unsigned char *out_ptr = out_data;

		// Check that we can handle one second of that sound
		if (format->speed * format->channels > (1 << INTEGER_BITS))
		{
			Con_Printf ("ResampleSfx: sound quality too high for resampling (%uHz, %u channel(s))\n",
					   format->speed, format->channels);
			return 0;
		}

		// We work 1 sec at a time to make sure we don't accumulate any
		// significant error when adding "fracstep" over several seconds, and
		// also to be able to handle very long sounds.
		while (total_out < outcount)
		{
			size_t tmpcount, interpolation_limit, i, j;
			unsigned int srcsample;

			samplefrac = 0;

			// If more than 1 sec of sound remains to be converted
			if (outcount - total_out > sb->format.speed)
			{
				tmpcount = sb->format.speed;
				interpolation_limit = tmpcount;  // all samples can be interpolated
			}
			else
			{
				tmpcount = outcount - total_out;
				interpolation_limit = (int)ceil((double)(((remain_in / format->channels) - 1) << FRACTIONAL_BITS) / fracstep);
				if (interpolation_limit > tmpcount)
					interpolation_limit = tmpcount;
			}

			// 16 bit samples
			if (format->width == 2)
			{
				const short* in_ptr_short;

				// Interpolated part
				for (i = 0; i < interpolation_limit; i++)
				{
					srcsample = (samplefrac >> FRACTIONAL_BITS) * format->channels;
					in_ptr_short = &((const short*)in_ptr)[srcsample];

					for (j = 0; j < format->channels; j++)
					{
						int a, b;

						a = *in_ptr_short;
						b = *(in_ptr_short + format->channels);
						*((short*)out_ptr) = (((b - a) * (samplefrac & FRACTIONAL_MASK)) >> FRACTIONAL_BITS) + a;

						in_ptr_short++;
						out_ptr += sizeof (short);
					}

					samplefrac += fracstep;
				}

				// Non-interpolated part
				for (/* nothing */; i < tmpcount; i++)
				{
					srcsample = (samplefrac >> FRACTIONAL_BITS) * format->channels;
					in_ptr_short = &((const short*)in_ptr)[srcsample];

					for (j = 0; j < format->channels; j++)
					{
						*((short*)out_ptr) = *in_ptr_short;

						in_ptr_short++;
						out_ptr += sizeof (short);
					}

					samplefrac += fracstep;
				}
			}
			// 8 bit samples
			else  // if (format->width == 1)
			{
				const unsigned char* in_ptr_byte;

				// Convert up to 1 sec of sound
				for (i = 0; i < interpolation_limit; i++)
				{
					srcsample = (samplefrac >> FRACTIONAL_BITS) * format->channels;
					in_ptr_byte = &((const unsigned char*)in_ptr)[srcsample];

					for (j = 0; j < format->channels; j++)
					{
						int a, b;

						a = *in_ptr_byte - 128;
						b = *(in_ptr_byte + format->channels) - 128;
						*((signed char*)out_ptr) = (((b - a) * (samplefrac & FRACTIONAL_MASK)) >> FRACTIONAL_BITS) + a;

						in_ptr_byte++;
						out_ptr += sizeof (signed char);
					}

					samplefrac += fracstep;
				}

				// Non-interpolated part
				for (/* nothing */; i < tmpcount; i++)
				{
					srcsample = (samplefrac >> FRACTIONAL_BITS) * format->channels;
					in_ptr_byte = &((const unsigned char*)in_ptr)[srcsample];

					for (j = 0; j < format->channels; j++)
					{
						*((signed char*)out_ptr) = *in_ptr_byte - 128;

						in_ptr_byte++;
						out_ptr += sizeof (signed char);
					}

					samplefrac += fracstep;
				}
			}

			// Update the counters and the buffer position
			remain_in -= format->speed * format->channels;
			in_ptr += format->speed * format->channels * format->width;
			total_out += tmpcount;
		}
	}

	sb->nbframes += (unsigned int)outcount;
	return true;
}


//=============================================================================

/*
==============
S_LoadSound
==============
*/
qboolean S_LoadSound (sfx_t *sfx, qboolean complain)
{
	char namebuffer[MAX_QPATH + 16];
	size_t len;

	// See if already loaded
	if (sfx->fetcher != NULL)
		return true;

	// If we weren't able to load it previously, no need to retry
	// Note: S_PrecacheSound clears this flag to cause a retry
	if (sfx->flags & SFXFLAG_FILEMISSING)
		return false;

	// No sound?
	if (snd_renderbuffer == NULL)
		return false;

	// Initialize volume peak to 0; if ReplayGain is supported, the loader will change this away
	sfx->volume_peak = 0.0;

	if (developer_loading.integer)
		Con_Printf("loading sound %s\n", sfx->name);

	SCR_PushLoadingScreen(true, sfx->name, 1);

	// LordHavoc: if the sound filename does not begin with sound/, try adding it
	if (strncasecmp(sfx->name, "sound/", 6))
	{
		dpsnprintf (namebuffer, sizeof(namebuffer), "sound/%s", sfx->name);
		len = strlen(namebuffer);
		if (len >= 4 && !strcasecmp (namebuffer + len - 4, ".wav"))
		{
			if (S_LoadWavFile (namebuffer, sfx))
				goto loaded;
			memcpy (namebuffer + len - 3, "ogg", 4);
		}
		if (len >= 4 && !strcasecmp (namebuffer + len - 4, ".ogg"))
		{
			if (OGG_LoadVorbisFile (namebuffer, sfx))
				goto loaded;
		}
	}

	// LordHavoc: then try without the added sound/ as wav and ogg
	dpsnprintf (namebuffer, sizeof(namebuffer), "%s", sfx->name);
	len = strlen(namebuffer);
	// request foo.wav: tries foo.wav, then foo.ogg
	// request foo.ogg: tries foo.ogg only
	// request foo.mod: tries foo.mod only
	if (len >= 4 && !strcasecmp (namebuffer + len - 4, ".wav"))
	{
		if (S_LoadWavFile (namebuffer, sfx))
			goto loaded;
		memcpy (namebuffer + len - 3, "ogg", 4);
	}
	if (len >= 4 && !strcasecmp (namebuffer + len - 4, ".ogg"))
	{
		if (OGG_LoadVorbisFile (namebuffer, sfx))
			goto loaded;
	}

	// Can't load the sound!
	sfx->flags |= SFXFLAG_FILEMISSING;
	if (complain)
		Con_DPrintf("failed to load sound \"%s\"\n", sfx->name);

	SCR_PopLoadingScreen(false);
	return false;

loaded:
	SCR_PopLoadingScreen(false);
	return true;
}