4 This file is part of PulseAudio.
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #include <pulse/sample.h>
30 #include <pulse/volume.h>
31 #include <pulse/timeval.h>
33 #include <pulsecore/envelope.h>
34 #include <pulsecore/macro.h>
35 #include <pulsecore/endianmacros.h>
36 #include <pulsecore/memblock.h>
37 #include <pulsecore/sample-util.h>
39 #include <liboil/liboil.h>
41 const pa_envelope_def ramp_down
= {
43 .points_x
= { 100*PA_USEC_PER_MSEC
, 300*PA_USEC_PER_MSEC
},
46 .i
= { 0x10000, 0x10000/5 }
50 const pa_envelope_def ramp_up
= {
52 .points_x
= { 100*PA_USEC_PER_MSEC
, 300*PA_USEC_PER_MSEC
},
55 .i
= { 0x10000/5, 0x10000 }
59 const pa_envelope_def ramp_down2
= {
61 .points_x
= { 50*PA_USEC_PER_MSEC
, 900*PA_USEC_PER_MSEC
},
64 .i
= { 0x10000*4/5, 0x10000*7/10 }
68 const pa_envelope_def ramp_up2
= {
70 .points_x
= { 50*PA_USEC_PER_MSEC
, 900*PA_USEC_PER_MSEC
},
73 .i
= { 0x10000*7/10, 0x10000*9/10 }
77 static void dump_block(const pa_sample_spec
*ss
, const pa_memchunk
*chunk
) {
81 static unsigned j
= 0;
83 d
= pa_memblock_acquire(chunk
->memblock
);
89 case PA_SAMPLE_ALAW
: {
92 for (i
= 0; i
< chunk
->length
/ pa_frame_size(ss
); i
++)
93 printf("0x%02x ", *(u
++));
99 case PA_SAMPLE_S16RE
: {
102 for (i
= 0; i
< chunk
->length
/ pa_frame_size(ss
); i
++)
103 printf("%i\t%i\n", j
++, *(u
++));
108 case PA_SAMPLE_S32NE
:
109 case PA_SAMPLE_S32RE
: {
112 for (i
= 0; i
< chunk
->length
/ pa_frame_size(ss
); i
++)
113 printf("%i\t%i\n", j
++, *(u
++));
118 case PA_SAMPLE_FLOAT32NE
:
119 case PA_SAMPLE_FLOAT32RE
: {
122 for (i
= 0; i
< chunk
->length
/ pa_frame_size(ss
); i
++) {
123 printf("%i\t%1.3g\n", j
++, PA_MAYBE_FLOAT32_SWAP(ss
->format
== PA_SAMPLE_FLOAT32RE
, *u
));
131 pa_assert_not_reached();
136 pa_memblock_release(chunk
->memblock
);
139 static pa_memblock
* generate_block(pa_mempool
*pool
, const pa_sample_spec
*ss
) {
144 block
= pa_memblock_new(pool
, pa_bytes_per_second(ss
));
145 n_samples
= pa_memblock_get_length(block
) / pa_sample_size(ss
);
147 d
= pa_memblock_acquire(block
);
149 switch (ss
->format
) {
151 case PA_SAMPLE_S16NE
:
152 case PA_SAMPLE_S16RE
: {
155 for (i
= d
; n_samples
> 0; n_samples
--, i
++)
161 case PA_SAMPLE_S32NE
:
162 case PA_SAMPLE_S32RE
: {
165 for (i
= d
; n_samples
> 0; n_samples
--, i
++)
171 case PA_SAMPLE_FLOAT32RE
:
172 case PA_SAMPLE_FLOAT32NE
: {
175 for (f
= d
; n_samples
> 0; n_samples
--, f
++)
176 *f
= PA_MAYBE_FLOAT32_SWAP(ss
->format
== PA_SAMPLE_FLOAT32RE
, 1.0);
182 pa_assert_not_reached();
185 pa_memblock_release(block
);
189 int main(int argc
, char *argv
[]) {
193 pa_envelope
*envelope
;
194 pa_envelope_item
*item1
, *item2
;
196 const pa_sample_spec ss
= {
197 .format
= PA_SAMPLE_S16NE
,
202 const pa_cvolume v
= {
204 .values
= { PA_VOLUME_NORM
, PA_VOLUME_NORM
/2 }
208 pa_log_set_maximal_level(PA_LOG_DEBUG
);
210 pa_assert_se(pool
= pa_mempool_new(FALSE
));
211 pa_assert_se(envelope
= pa_envelope_new(&ss
));
213 block
= generate_block(pool
, &ss
);
215 chunk
.memblock
= pa_memblock_ref(block
);
216 chunk
.length
= pa_memblock_get_length(block
);
219 pa_volume_memchunk(&chunk
, &ss
, &v
);
221 item1
= pa_envelope_add(envelope
, &ramp_down
);
222 item2
= pa_envelope_add(envelope
, &ramp_down2
);
223 pa_envelope_apply(envelope
, &chunk
);
224 dump_block(&ss
, &chunk
);
226 pa_memblock_unref(chunk
.memblock
);
228 chunk
.memblock
= pa_memblock_ref(block
);
229 chunk
.length
= pa_memblock_get_length(block
);
232 item1
= pa_envelope_replace(envelope
, item1
, &ramp_up
);
233 item2
= pa_envelope_replace(envelope
, item2
, &ramp_up2
);
234 pa_envelope_apply(envelope
, &chunk
);
235 dump_block(&ss
, &chunk
);
237 pa_memblock_unref(chunk
.memblock
);
239 pa_envelope_remove(envelope
, item1
);
240 pa_envelope_remove(envelope
, item2
);
241 pa_envelope_free(envelope
);
243 pa_memblock_unref(block
);
245 pa_mempool_free(pool
);