source: mainline/uspace/app/wavplay/dplay.c@ 045186b

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 045186b was fafb8e5, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Mechanically lowercase IPC_SET_*/IPC_GET_*
  • Property mode set to 100644
File size: 11.7 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 wavplay
30 * @{
31 */
32/**
33 * @file PCM playback audio devices
34 */
35
36#include <assert.h>
37#include <errno.h>
38#include <str_error.h>
39#include <str.h>
40#include <audio_pcm_iface.h>
41#include <fibril_synch.h>
42#include <pcm/format.h>
43#include <as.h>
44#include <time.h>
45#include <inttypes.h>
46#include <stdbool.h>
47#include <stdio.h>
48#include <macros.h>
49
50#include "wave.h"
51#include "dplay.h"
52
53#define DEFAULT_FRAGMENTS 2
54
55/** Playback helper structure */
56typedef struct {
57 struct {
58 void *base;
59 size_t size;
60 void *write_ptr;
61 } buffer;
62 pcm_format_t f;
63 FILE *source;
64 volatile bool playing;
65 fibril_mutex_t mutex;
66 fibril_condvar_t cv;
67 audio_pcm_sess_t *device;
68} playback_t;
69
70/**
71 * Initialize playback helper structure.
72 * @param pb Pointer to helper structure to initialize
73 * @param sess Pointer to audio device IPC session
74 * @return
75 */
76static void playback_initialize(playback_t *pb, audio_pcm_sess_t *sess)
77{
78 assert(sess);
79 assert(pb);
80 pb->buffer.base = NULL;
81 pb->buffer.size = 0;
82 pb->buffer.write_ptr = NULL;
83 pb->playing = false;
84 pb->source = NULL;
85 pb->device = sess;
86 fibril_mutex_initialize(&pb->mutex);
87 fibril_condvar_initialize(&pb->cv);
88}
89
90/** Fragment playback callback function.
91 *
92 * @param icall Pointer to the call structure
93 * @param arg Argument, pointer to the playback helper function
94 *
95 */
96static void device_event_callback(ipc_call_t *icall, void *arg)
97{
98 playback_t *pb = arg;
99 const size_t fragment_size = pb->buffer.size / DEFAULT_FRAGMENTS;
100
101 while (true) {
102 ipc_call_t call;
103 async_get_call(&call);
104
105 switch (ipc_get_imethod(&call)) {
106 case PCM_EVENT_PLAYBACK_STARTED:
107 case PCM_EVENT_FRAMES_PLAYED:
108 printf("%" PRIun " frames: ", ipc_get_arg1(&call));
109 async_answer_0(&call, EOK);
110 break;
111 case PCM_EVENT_PLAYBACK_TERMINATED:
112 printf("Playback terminated\n");
113 fibril_mutex_lock(&pb->mutex);
114 pb->playing = false;
115 fibril_condvar_signal(&pb->cv);
116 async_answer_0(&call, EOK);
117 fibril_mutex_unlock(&pb->mutex);
118 return;
119 default:
120 printf("Unknown event %" PRIun ".\n", ipc_get_imethod(&call));
121 async_answer_0(&call, ENOTSUP);
122 continue;
123
124 }
125 const size_t bytes = fread(pb->buffer.write_ptr,
126 sizeof(uint8_t), fragment_size, pb->source);
127 printf("Copied from position %p size %zu/%zu\n",
128 pb->buffer.write_ptr, bytes, fragment_size);
129 if (bytes == 0) {
130 audio_pcm_last_playback_fragment(pb->device);
131 }
132 /* any constant is silence */
133 memset(pb->buffer.write_ptr + bytes, 0, fragment_size - bytes);
134 pb->buffer.write_ptr += fragment_size;
135
136 if (pb->buffer.write_ptr >= (pb->buffer.base + pb->buffer.size))
137 pb->buffer.write_ptr -= pb->buffer.size;
138 }
139}
140
141/**
142 * Start event based playback.
143 * @param pb Playback helper structure.
144 */
145static void play_fragment(playback_t *pb)
146{
147 assert(pb);
148 assert(pb->device);
149 const size_t fragment_size = pb->buffer.size / DEFAULT_FRAGMENTS;
150 printf("Registering event callback\n");
151 errno_t ret = audio_pcm_register_event_callback(pb->device,
152 device_event_callback, pb);
153 if (ret != EOK) {
154 printf("Failed to register event callback: %s.\n",
155 str_error(ret));
156 return;
157 }
158 printf("Playing: %dHz, %s, %d channel(s).\n", pb->f.sampling_rate,
159 pcm_sample_format_str(pb->f.sample_format), pb->f.channels);
160 const size_t bytes = fread(pb->buffer.base, sizeof(uint8_t),
161 fragment_size, pb->source);
162 if (bytes != fragment_size)
163 memset(pb->buffer.base + bytes, 0, fragment_size - bytes);
164 printf("Initial: Copied from position %p size %zu/%zu\n",
165 pb->buffer.base, bytes, fragment_size);
166 pb->buffer.write_ptr = pb->buffer.base + fragment_size;
167 fibril_mutex_lock(&pb->mutex);
168 const unsigned frames =
169 pcm_format_size_to_frames(fragment_size, &pb->f);
170 ret = audio_pcm_start_playback_fragment(pb->device, frames,
171 pb->f.channels, pb->f.sampling_rate, pb->f.sample_format);
172 if (ret != EOK) {
173 fibril_mutex_unlock(&pb->mutex);
174 printf("Failed to start playback: %s.\n", str_error(ret));
175 audio_pcm_unregister_event_callback(pb->device);
176 return;
177 }
178
179 pb->playing = true;
180 while (pb->playing)
181 fibril_condvar_wait(&pb->cv, &pb->mutex);
182
183 fibril_mutex_unlock(&pb->mutex);
184 printf("\n");
185 audio_pcm_unregister_event_callback(pb->device);
186}
187
188/**
189 * Count occupied space in a cyclic buffer.
190 * @param pb Playback helper structure.
191 * @param pos read pointer position.
192 * @return Occupied space size.
193 */
194static size_t buffer_occupied(const playback_t *pb, size_t pos)
195{
196 assert(pb);
197 void *read_ptr = pb->buffer.base + pos;
198 if (read_ptr > pb->buffer.write_ptr)
199 return pb->buffer.write_ptr + pb->buffer.size - read_ptr;
200 return pb->buffer.write_ptr - read_ptr;
201
202}
203
204/**
205 * Count available space in a cyclic buffer.
206 * @param pb Playback helper structure.
207 * @param pos read pointer position.
208 * @return Free space size.
209 */
210static size_t buffer_avail(const playback_t *pb, size_t pos)
211{
212 assert(pb);
213 void *read_ptr = pb->buffer.base + pos;
214 if (read_ptr <= pb->buffer.write_ptr)
215 return read_ptr + pb->buffer.size - pb->buffer.write_ptr - 1;
216 return (read_ptr - pb->buffer.write_ptr) - 1;
217}
218
219/**
220 * Size of the space between write pointer and the end of a cyclic buffer
221 * @param pb Playback helper structure.
222 */
223static size_t buffer_remain(const playback_t *pb)
224{
225 assert(pb);
226 return (pb->buffer.base + pb->buffer.size) - pb->buffer.write_ptr;
227}
228
229/**
230 * Move write pointer forward. Wrap around the end.
231 * @param pb Playback helper structure.
232 * @param bytes NUmber of bytes to advance.
233 */
234static void buffer_advance(playback_t *pb, size_t bytes)
235{
236 assert(pb);
237 pb->buffer.write_ptr += bytes;
238 while (pb->buffer.write_ptr >= (pb->buffer.base + pb->buffer.size))
239 pb->buffer.write_ptr -= pb->buffer.size;
240}
241
242#define DPRINTF(f, ...) \
243 printf("%.2lld:%.6lld "f, time.tv_sec % 100, \
244 NSEC2USEC(time.tv_nsec), __VA_ARGS__)
245
246/**
247 * Start playback using buffer position api.
248 * @param pb Playback helper function.
249 */
250static void play(playback_t *pb)
251{
252 assert(pb);
253 assert(pb->device);
254 pb->buffer.write_ptr = pb->buffer.base;
255 printf("Playing: %dHz, %s, %d channel(s).\n", pb->f.sampling_rate,
256 pcm_sample_format_str(pb->f.sample_format), pb->f.channels);
257 usec_t work_time = 50000; /* 50 ms */
258 bool started = false;
259 size_t pos = 0;
260 struct timespec time = { 0 };
261 getuptime(&time);
262 while (true) {
263 size_t available = buffer_avail(pb, pos);
264 /*
265 * Writing might need wrap around the end,
266 * read directly to device buffer
267 */
268 size_t bytes = fread(pb->buffer.write_ptr, sizeof(uint8_t),
269 min(available, buffer_remain(pb)), pb->source);
270 buffer_advance(pb, bytes);
271 DPRINTF("POS %zu: %zu bytes free in buffer, read %zu, wp %zu\n",
272 pos, available, bytes,
273 pb->buffer.write_ptr - pb->buffer.base);
274 available -= bytes;
275
276 /* continue if we wrapped around the end */
277 if (available) {
278 bytes = fread(pb->buffer.write_ptr,
279 sizeof(uint8_t), min(available, buffer_remain(pb)),
280 pb->source);
281 buffer_advance(pb, bytes);
282 DPRINTF("POS %zu: %zu bytes still free in buffer, "
283 "read %zu, wp %zu\n", pos, available, bytes,
284 pb->buffer.write_ptr - pb->buffer.base);
285 available -= bytes;
286 }
287
288 if (!started) {
289 errno_t ret = audio_pcm_start_playback(pb->device,
290 pb->f.channels, pb->f.sampling_rate,
291 pb->f.sample_format);
292 if (ret != EOK) {
293 printf("Failed to start playback: %s\n",
294 str_error(ret));
295 return;
296 }
297 started = true;
298 ret = audio_pcm_get_buffer_pos(pb->device, &pos);
299 if (ret != EOK) {
300 printf("Failed to update position indicator "
301 "%s\n", str_error(ret));
302 }
303 }
304 const size_t to_play = buffer_occupied(pb, pos);
305 const usec_t usecs = pcm_format_size_to_usec(to_play, &pb->f);
306
307 /* Compute delay time */
308 const usec_t real_delay = (usecs > work_time) ?
309 usecs - work_time : 0;
310 DPRINTF("POS %zu: %lld usecs (%lld) to play %zu bytes.\n",
311 pos, usecs, real_delay, to_play);
312 if (real_delay)
313 fibril_usleep(real_delay);
314 /* update buffer position */
315 const errno_t ret = audio_pcm_get_buffer_pos(pb->device, &pos);
316 if (ret != EOK) {
317 printf("Failed to update position indicator %s\n",
318 str_error(ret));
319 }
320 getuptime(&time);
321
322 /*
323 * we did not use all the space we had,
324 * that is the end
325 */
326 if (available)
327 break;
328
329 }
330 audio_pcm_stop_playback_immediate(pb->device);
331}
332
333/**
334 * Play audio file usign direct device access.
335 * @param device The device.
336 * @param file The file.
337 * @return 0 on success, non-zero on failure.
338 */
339int dplay(const char *device, const char *file)
340{
341 errno_t ret = EOK;
342 audio_pcm_sess_t *session = NULL;
343 if (str_cmp(device, "default") == 0) {
344 session = audio_pcm_open_default();
345 } else {
346 session = audio_pcm_open(device);
347 }
348 if (!session) {
349 printf("Failed to connect to device %s.\n", device);
350 return 1;
351 }
352 printf("Playing on device: %s.\n", device);
353 sysarg_t val;
354 ret = audio_pcm_query_cap(session, AUDIO_CAP_PLAYBACK, &val);
355 if (ret != EOK || !val) {
356 printf("Device %s does not support playback\n", device);
357 ret = ENOTSUP;
358 goto close_session;
359 }
360
361 char *info = NULL;
362 ret = audio_pcm_get_info_str(session, &info);
363 if (ret != EOK) {
364 printf("Failed to get PCM info: %s.\n", str_error(ret));
365 goto close_session;
366 }
367 printf("Playing on %s.\n", info);
368 free(info);
369
370 playback_t pb;
371 playback_initialize(&pb, session);
372
373 ret = audio_pcm_get_buffer(pb.device, &pb.buffer.base, &pb.buffer.size);
374 if (ret != EOK) {
375 printf("Failed to get PCM buffer: %s.\n", str_error(ret));
376 goto close_session;
377 }
378 printf("Buffer: %p %zu.\n", pb.buffer.base, pb.buffer.size);
379
380 pb.source = fopen(file, "rb");
381 if (pb.source == NULL) {
382 ret = ENOENT;
383 printf("Failed to open file: %s.\n", file);
384 goto cleanup;
385 }
386
387 wave_header_t header;
388 fread(&header, sizeof(header), 1, pb.source);
389 const char *error;
390 ret = wav_parse_header(&header, NULL, NULL,
391 &pb.f.channels, &pb.f.sampling_rate, &pb.f.sample_format, &error);
392 if (ret != EOK) {
393 printf("Error parsing wav header: %s.\n", error);
394 goto cleanup;
395 }
396 ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_BUFFER_POS, &val);
397 if (ret == EOK && val) {
398 play(&pb);
399 } else {
400 ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_INTERRUPT, &val);
401 if (ret == EOK && val)
402 play_fragment(&pb);
403 else
404 printf("Neither playing method is supported");
405 }
406
407cleanup:
408 fclose(pb.source);
409 as_area_destroy(pb.buffer.base);
410 audio_pcm_release_buffer(pb.device);
411close_session:
412 audio_pcm_close(session);
413 return ret == EOK ? 0 : 1;
414}
415/**
416 * @}
417 */
Note: See TracBrowser for help on using the repository browser.