source: mainline/uspace/lib/pcm/src/format.c@ 6ff23ff

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 6ff23ff was 7c3fb9b, checked in by Jiri Svoboda <jiri@…>, 7 years ago

Fix block comment formatting (ccheck).
  • Property mode set to 100644
File size: 9.6 KB
Line 
1/*
2 * Copyright (c) 2012 Jan Vesely
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup audio
30 * @brief HelenOS sound server
31 * @{
32 */
33/** @file
34 */
35
36#include <assert.h>
37#include <byteorder.h>
38#include <errno.h>
39#include <macros.h>
40#include <stdio.h>
41
42#include "format.h"
43
44// TODO float endian?
45#define float_le2host(x) (x)
46#define float_be2host(x) (x)
47
48#define host2float_le(x) (x)
49#define host2float_be(x) (x)
50
51#define from(x, type, endian) (float)(type ## _ ## endian ## 2host(x))
52#define to(x, type, endian) (float)(host2 ## type ## _ ## endian(x))
53
54/** Default linear PCM format */
55const pcm_format_t AUDIO_FORMAT_DEFAULT = {
56 .channels = 2,
57 .sampling_rate = 44100,
58 .sample_format = PCM_SAMPLE_SINT16_LE,
59};
60
61/** Special ANY PCM format.
62 * This format is used if the real format is no know or important.
63 */
64const pcm_format_t AUDIO_FORMAT_ANY = {
65 .channels = 0,
66 .sampling_rate = 0,
67 .sample_format = 0,
68};
69
70static float get_normalized_sample(const void *buffer, size_t size,
71 unsigned frame, unsigned channel, const pcm_format_t *f);
72
73/**
74 * Compare PCM format attribtues.
75 * @param a Format description.
76 * @param b Format description.
77 * @return True if a and b describe the same format, false otherwise.
78 */
79bool pcm_format_same(const pcm_format_t *a, const pcm_format_t *b)
80{
81 assert(a);
82 assert(b);
83 return
84 a->sampling_rate == b->sampling_rate &&
85 a->channels == b->channels &&
86 a->sample_format == b->sample_format;
87}
88
89/**
90 * Fill audio buffer with silence in the specified format.
91 * @param dst Destination audio buffer.
92 * @param size Size of the destination audio buffer.
93 * @param f Pointer to the format description.
94 */
95void pcm_format_silence(void *dst, size_t size, const pcm_format_t *f)
96{
97#define SET_NULL(type, endian, nullv) \
98do { \
99 type *buffer = dst; \
100 const size_t sample_count = size / sizeof(type); \
101 for (unsigned i = 0; i < sample_count; ++i) { \
102 buffer[i] = to((type)nullv, type, endian); \
103 } \
104} while (0)
105
106 switch (f->sample_format) {
107 case PCM_SAMPLE_UINT8:
108 SET_NULL(uint8_t, le, INT8_MIN);
109 break;
110 case PCM_SAMPLE_SINT8:
111 SET_NULL(int8_t, le, 0);
112 break;
113 case PCM_SAMPLE_UINT16_LE:
114 SET_NULL(uint16_t, le, INT16_MIN);
115 break;
116 case PCM_SAMPLE_SINT16_LE:
117 SET_NULL(int16_t, le, 0);
118 break;
119 case PCM_SAMPLE_UINT16_BE:
120 SET_NULL(uint16_t, be, INT16_MIN);
121 break;
122 case PCM_SAMPLE_SINT16_BE:
123 SET_NULL(int16_t, be, 0);
124 break;
125 case PCM_SAMPLE_UINT32_LE:
126 SET_NULL(uint32_t, le, INT32_MIN);
127 break;
128 case PCM_SAMPLE_SINT32_LE:
129 SET_NULL(int32_t, le, 0);
130 break;
131 case PCM_SAMPLE_UINT32_BE:
132 SET_NULL(uint32_t, be, INT32_MIN);
133 break;
134 case PCM_SAMPLE_SINT32_BE:
135 SET_NULL(int32_t, le, 0);
136 break;
137 case PCM_SAMPLE_UINT24_32_LE:
138 case PCM_SAMPLE_SINT24_32_LE:
139 case PCM_SAMPLE_UINT24_32_BE:
140 case PCM_SAMPLE_SINT24_32_BE:
141 case PCM_SAMPLE_UINT24_LE:
142 case PCM_SAMPLE_SINT24_LE:
143 case PCM_SAMPLE_UINT24_BE:
144 case PCM_SAMPLE_SINT24_BE:
145 case PCM_SAMPLE_FLOAT32:
146 default:
147 break;
148 }
149#undef SET_NULL
150}
151
152/**
153 * Mix audio data of the same format and size.
154 * @param dst Destination buffer
155 * @param src Source buffer
156 * @param size Size of both the destination and the source buffer
157 * @param f Pointer to the format descriptor.
158 * @return Error code.
159 */
160errno_t pcm_format_mix(void *dst, const void *src, size_t size, const pcm_format_t *f)
161{
162 return pcm_format_convert_and_mix(dst, size, src, size, f, f);
163}
164
165/**
166 * Add and mix audio data.
167 * @param dst Destination audio buffer
168 * @param dst_size Size of the destination buffer
169 * @param src Source audio buffer
170 * @param src_size Size of the source buffer.
171 * @param sf Pointer to the source format descriptor.
172 * @param df Pointer to the destination format descriptor.
173 * @return Error code.
174 *
175 * Buffers must contain entire frames. Destination buffer is always filled.
176 * If there are not enough data in the source buffer silent data is assumed.
177 */
178errno_t pcm_format_convert_and_mix(void *dst, size_t dst_size, const void *src,
179 size_t src_size, const pcm_format_t *sf, const pcm_format_t *df)
180{
181 if (!dst || !src || !sf || !df)
182 return EINVAL;
183 const size_t src_frame_size = pcm_format_frame_size(sf);
184 if ((src_size % src_frame_size) != 0)
185 return EINVAL;
186
187 const size_t dst_frame_size = pcm_format_frame_size(df);
188 if ((dst_size % dst_frame_size) != 0)
189 return EINVAL;
190
191 /*
192 * This is so ugly it eats kittens, and puppies, and ducklings,
193 * and all little fluffy things...
194 */
195#define LOOP_ADD(type, endian, low, high) \
196do { \
197 const unsigned frame_count = dst_size / dst_frame_size; \
198 for (size_t i = 0; i < frame_count; ++i) { \
199 for (unsigned j = 0; j < df->channels; ++j) { \
200 const float a = \
201 get_normalized_sample(dst, dst_size, i, j, df);\
202 const float b = \
203 get_normalized_sample(src, src_size, i, j, sf);\
204 float c = (a + b); \
205 if (c < -1.0) c = -1.0; \
206 if (c > 1.0) c = 1.0; \
207 c += 1.0; \
208 c *= ((float)(type)high - (float)(type)low) / 2; \
209 c += (float)(type)low; \
210 type *dst_buf = dst; \
211 const unsigned pos = i * df->channels + j; \
212 if (pos < (dst_size / sizeof(type))) \
213 dst_buf[pos] = to((type)c, type, endian); \
214 } \
215 } \
216} while (0)
217
218 switch (df->sample_format) {
219 case PCM_SAMPLE_UINT8:
220 LOOP_ADD(uint8_t, le, UINT8_MIN, UINT8_MAX);
221 break;
222 case PCM_SAMPLE_SINT8:
223 LOOP_ADD(uint8_t, le, INT8_MIN, INT8_MAX);
224 break;
225 case PCM_SAMPLE_UINT16_LE:
226 LOOP_ADD(uint16_t, le, UINT16_MIN, UINT16_MAX);
227 break;
228 case PCM_SAMPLE_SINT16_LE:
229 LOOP_ADD(int16_t, le, INT16_MIN, INT16_MAX);
230 break;
231 case PCM_SAMPLE_UINT16_BE:
232 LOOP_ADD(uint16_t, be, UINT16_MIN, UINT16_MAX);
233 break;
234 case PCM_SAMPLE_SINT16_BE:
235 LOOP_ADD(int16_t, be, INT16_MIN, INT16_MAX);
236 break;
237 case PCM_SAMPLE_UINT24_32_LE:
238 case PCM_SAMPLE_UINT32_LE: // TODO this are not right for 24bit
239 LOOP_ADD(uint32_t, le, UINT32_MIN, UINT32_MAX);
240 break;
241 case PCM_SAMPLE_SINT24_32_LE:
242 case PCM_SAMPLE_SINT32_LE:
243 LOOP_ADD(int32_t, le, INT32_MIN, INT32_MAX);
244 break;
245 case PCM_SAMPLE_UINT24_32_BE:
246 case PCM_SAMPLE_UINT32_BE:
247 LOOP_ADD(uint32_t, be, UINT32_MIN, UINT32_MAX);
248 break;
249 case PCM_SAMPLE_SINT24_32_BE:
250 case PCM_SAMPLE_SINT32_BE:
251 LOOP_ADD(int32_t, be, INT32_MIN, INT32_MAX);
252 break;
253 case PCM_SAMPLE_UINT24_LE:
254 case PCM_SAMPLE_SINT24_LE:
255 case PCM_SAMPLE_UINT24_BE:
256 case PCM_SAMPLE_SINT24_BE:
257 case PCM_SAMPLE_FLOAT32:
258 default:
259 return ENOTSUP;
260 }
261 return EOK;
262#undef LOOP_ADD
263}
264
265/**
266 * Converts all sample formats to float <-1,1>
267 * @param buffer Audio data
268 * @param size Size of the buffer
269 * @param frame Index of the frame to read
270 * @param channel Channel within the frame
271 * @param f Pointer to a format descriptor
272 * @return Normalized sample <-1,1>, 0.0 if the data could not be read
273 */
274static float get_normalized_sample(const void *buffer, size_t size,
275 unsigned frame, unsigned channel, const pcm_format_t *f)
276{
277 assert(f);
278 assert(buffer);
279 if (channel >= f->channels)
280 return 0.0f;
281#define GET(type, endian, low, high) \
282do { \
283 const type *src = buffer; \
284 const size_t sample_count = size / sizeof(type); \
285 const size_t sample_pos = frame * f->channels + channel; \
286 if (sample_pos >= sample_count) {\
287 return 0.0f; \
288 } \
289 float sample = from(src[sample_pos], type, endian); \
290 /* This makes it positive */ \
291 sample -= (float)(type)low; \
292 /* This makes it <0,2> */ \
293 sample /= (((float)(type)high - (float)(type)low) / 2.0f); \
294 return sample - 1.0f; \
295} while (0)
296
297 switch (f->sample_format) {
298 case PCM_SAMPLE_UINT8:
299 GET(uint8_t, le, UINT8_MIN, UINT8_MAX);
300 case PCM_SAMPLE_SINT8:
301 GET(int8_t, le, INT8_MIN, INT8_MAX);
302 case PCM_SAMPLE_UINT16_LE:
303 GET(uint16_t, le, UINT16_MIN, UINT16_MAX);
304 case PCM_SAMPLE_SINT16_LE:
305 GET(int16_t, le, INT16_MIN, INT16_MAX);
306 case PCM_SAMPLE_UINT16_BE:
307 GET(uint16_t, be, UINT16_MIN, UINT16_MAX);
308 case PCM_SAMPLE_SINT16_BE:
309 GET(int16_t, be, INT16_MIN, INT16_MAX);
310 case PCM_SAMPLE_UINT24_32_LE:
311 case PCM_SAMPLE_UINT32_LE:
312 GET(uint32_t, le, UINT32_MIN, UINT32_MAX);
313 case PCM_SAMPLE_SINT24_32_LE:
314 case PCM_SAMPLE_SINT32_LE:
315 GET(int32_t, le, INT32_MIN, INT32_MAX);
316 case PCM_SAMPLE_UINT24_32_BE:
317 case PCM_SAMPLE_UINT32_BE:
318 GET(uint32_t, be, UINT32_MIN, UINT32_MAX);
319 case PCM_SAMPLE_SINT24_32_BE:
320 case PCM_SAMPLE_SINT32_BE:
321 GET(int32_t, le, INT32_MIN, INT32_MAX);
322 case PCM_SAMPLE_UINT24_LE:
323 case PCM_SAMPLE_SINT24_LE:
324 case PCM_SAMPLE_UINT24_BE:
325 case PCM_SAMPLE_SINT24_BE:
326 case PCM_SAMPLE_FLOAT32:
327 default:
328 break;
329 }
330 return 0;
331#undef GET
332}
333/**
334 * @}
335 */
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