source: mainline/uspace/app/wavplay/dplay.c@ 09ab0a9a

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 09ab0a9a was a63966d, checked in by Jakub Jermar <jakub@…>, 7 years ago

Provide doc/doxygroups.h for most apps
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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 async_answer_0(icall, EOK);
99 playback_t *pb = arg;
100 const size_t fragment_size = pb->buffer.size / DEFAULT_FRAGMENTS;
101
102 while (true) {
103 ipc_call_t call;
104 async_get_call(&call);
105
106 switch (IPC_GET_IMETHOD(call)) {
107 case PCM_EVENT_PLAYBACK_STARTED:
108 case PCM_EVENT_FRAMES_PLAYED:
109 printf("%" PRIun " frames: ", IPC_GET_ARG1(call));
110 async_answer_0(&call, EOK);
111 break;
112 case PCM_EVENT_PLAYBACK_TERMINATED:
113 printf("Playback terminated\n");
114 fibril_mutex_lock(&pb->mutex);
115 pb->playing = false;
116 fibril_condvar_signal(&pb->cv);
117 async_answer_0(&call, EOK);
118 fibril_mutex_unlock(&pb->mutex);
119 return;
120 default:
121 printf("Unknown event %" PRIun ".\n", IPC_GET_IMETHOD(call));
122 async_answer_0(&call, ENOTSUP);
123 continue;
124
125 }
126 const size_t bytes = fread(pb->buffer.write_ptr,
127 sizeof(uint8_t), fragment_size, pb->source);
128 printf("Copied from position %p size %zu/%zu\n",
129 pb->buffer.write_ptr, bytes, fragment_size);
130 if (bytes == 0) {
131 audio_pcm_last_playback_fragment(pb->device);
132 }
133 /* any constant is silence */
134 memset(pb->buffer.write_ptr + bytes, 0, fragment_size - bytes);
135 pb->buffer.write_ptr += fragment_size;
136
137 if (pb->buffer.write_ptr >= (pb->buffer.base + pb->buffer.size))
138 pb->buffer.write_ptr -= pb->buffer.size;
139 }
140}
141
142/**
143 * Start event based playback.
144 * @param pb Playback helper structure.
145 */
146static void play_fragment(playback_t *pb)
147{
148 assert(pb);
149 assert(pb->device);
150 const size_t fragment_size = pb->buffer.size / DEFAULT_FRAGMENTS;
151 printf("Registering event callback\n");
152 errno_t ret = audio_pcm_register_event_callback(pb->device,
153 device_event_callback, pb);
154 if (ret != EOK) {
155 printf("Failed to register event callback: %s.\n",
156 str_error(ret));
157 return;
158 }
159 printf("Playing: %dHz, %s, %d channel(s).\n", pb->f.sampling_rate,
160 pcm_sample_format_str(pb->f.sample_format), pb->f.channels);
161 const size_t bytes = fread(pb->buffer.base, sizeof(uint8_t),
162 fragment_size, pb->source);
163 if (bytes != fragment_size)
164 memset(pb->buffer.base + bytes, 0, fragment_size - bytes);
165 printf("Initial: Copied from position %p size %zu/%zu\n",
166 pb->buffer.base, bytes, fragment_size);
167 pb->buffer.write_ptr = pb->buffer.base + fragment_size;
168 fibril_mutex_lock(&pb->mutex);
169 const unsigned frames =
170 pcm_format_size_to_frames(fragment_size, &pb->f);
171 ret = audio_pcm_start_playback_fragment(pb->device, frames,
172 pb->f.channels, pb->f.sampling_rate, pb->f.sample_format);
173 if (ret != EOK) {
174 fibril_mutex_unlock(&pb->mutex);
175 printf("Failed to start playback: %s.\n", str_error(ret));
176 audio_pcm_unregister_event_callback(pb->device);
177 return;
178 }
179
180 pb->playing = true;
181 while (pb->playing)
182 fibril_condvar_wait(&pb->cv, &pb->mutex);
183
184 fibril_mutex_unlock(&pb->mutex);
185 printf("\n");
186 audio_pcm_unregister_event_callback(pb->device);
187}
188
189/**
190 * Count occupied space in a cyclic buffer.
191 * @param pb Playback helper structure.
192 * @param pos read pointer position.
193 * @return Occupied space size.
194 */
195static size_t buffer_occupied(const playback_t *pb, size_t pos)
196{
197 assert(pb);
198 void *read_ptr = pb->buffer.base + pos;
199 if (read_ptr > pb->buffer.write_ptr)
200 return pb->buffer.write_ptr + pb->buffer.size - read_ptr;
201 return pb->buffer.write_ptr - read_ptr;
202
203}
204
205/**
206 * Count available space in a cyclic buffer.
207 * @param pb Playback helper structure.
208 * @param pos read pointer position.
209 * @return Free space size.
210 */
211static size_t buffer_avail(const playback_t *pb, size_t pos)
212{
213 assert(pb);
214 void *read_ptr = pb->buffer.base + pos;
215 if (read_ptr <= pb->buffer.write_ptr)
216 return read_ptr + pb->buffer.size - pb->buffer.write_ptr - 1;
217 return (read_ptr - pb->buffer.write_ptr) - 1;
218}
219
220/**
221 * Size of the space between write pointer and the end of a cyclic buffer
222 * @param pb Playback helper structure.
223 */
224static size_t buffer_remain(const playback_t *pb)
225{
226 assert(pb);
227 return (pb->buffer.base + pb->buffer.size) - pb->buffer.write_ptr;
228}
229
230/**
231 * Move write pointer forward. Wrap around the end.
232 * @param pb Playback helper structure.
233 * @param bytes NUmber of bytes to advance.
234 */
235static void buffer_advance(playback_t *pb, size_t bytes)
236{
237 assert(pb);
238 pb->buffer.write_ptr += bytes;
239 while (pb->buffer.write_ptr >= (pb->buffer.base + pb->buffer.size))
240 pb->buffer.write_ptr -= pb->buffer.size;
241}
242
243#define DPRINTF(f, ...) \
244 printf("%.2lld:%.6lld "f, time.tv_sec % 100, \
245 NSEC2USEC(time.tv_nsec), __VA_ARGS__)
246
247/**
248 * Start playback using buffer position api.
249 * @param pb Playback helper function.
250 */
251static void play(playback_t *pb)
252{
253 assert(pb);
254 assert(pb->device);
255 pb->buffer.write_ptr = pb->buffer.base;
256 printf("Playing: %dHz, %s, %d channel(s).\n", pb->f.sampling_rate,
257 pcm_sample_format_str(pb->f.sample_format), pb->f.channels);
258 usec_t work_time = 50000; /* 50 ms */
259 bool started = false;
260 size_t pos = 0;
261 struct timespec time = { 0 };
262 getuptime(&time);
263 while (true) {
264 size_t available = buffer_avail(pb, pos);
265 /*
266 * Writing might need wrap around the end,
267 * read directly to device buffer
268 */
269 size_t bytes = fread(pb->buffer.write_ptr, sizeof(uint8_t),
270 min(available, buffer_remain(pb)), pb->source);
271 buffer_advance(pb, bytes);
272 DPRINTF("POS %zu: %zu bytes free in buffer, read %zu, wp %zu\n",
273 pos, available, bytes,
274 pb->buffer.write_ptr - pb->buffer.base);
275 available -= bytes;
276
277 /* continue if we wrapped around the end */
278 if (available) {
279 bytes = fread(pb->buffer.write_ptr,
280 sizeof(uint8_t), min(available, buffer_remain(pb)),
281 pb->source);
282 buffer_advance(pb, bytes);
283 DPRINTF("POS %zu: %zu bytes still free in buffer, "
284 "read %zu, wp %zu\n", pos, available, bytes,
285 pb->buffer.write_ptr - pb->buffer.base);
286 available -= bytes;
287 }
288
289 if (!started) {
290 errno_t ret = audio_pcm_start_playback(pb->device,
291 pb->f.channels, pb->f.sampling_rate,
292 pb->f.sample_format);
293 if (ret != EOK) {
294 printf("Failed to start playback: %s\n",
295 str_error(ret));
296 return;
297 }
298 started = true;
299 ret = audio_pcm_get_buffer_pos(pb->device, &pos);
300 if (ret != EOK) {
301 printf("Failed to update position indicator "
302 "%s\n", str_error(ret));
303 }
304 }
305 const size_t to_play = buffer_occupied(pb, pos);
306 const usec_t usecs = pcm_format_size_to_usec(to_play, &pb->f);
307
308 /* Compute delay time */
309 const usec_t real_delay = (usecs > work_time) ?
310 usecs - work_time : 0;
311 DPRINTF("POS %zu: %lld usecs (%lld) to play %zu bytes.\n",
312 pos, usecs, real_delay, to_play);
313 if (real_delay)
314 fibril_usleep(real_delay);
315 /* update buffer position */
316 const errno_t ret = audio_pcm_get_buffer_pos(pb->device, &pos);
317 if (ret != EOK) {
318 printf("Failed to update position indicator %s\n",
319 str_error(ret));
320 }
321 getuptime(&time);
322
323 /*
324 * we did not use all the space we had,
325 * that is the end
326 */
327 if (available)
328 break;
329
330 }
331 audio_pcm_stop_playback_immediate(pb->device);
332}
333
334/**
335 * Play audio file usign direct device access.
336 * @param device The device.
337 * @param file The file.
338 * @return 0 on success, non-zero on failure.
339 */
340int dplay(const char *device, const char *file)
341{
342 errno_t ret = EOK;
343 audio_pcm_sess_t *session = NULL;
344 if (str_cmp(device, "default") == 0) {
345 session = audio_pcm_open_default();
346 } else {
347 session = audio_pcm_open(device);
348 }
349 if (!session) {
350 printf("Failed to connect to device %s.\n", device);
351 return 1;
352 }
353 printf("Playing on device: %s.\n", device);
354 sysarg_t val;
355 ret = audio_pcm_query_cap(session, AUDIO_CAP_PLAYBACK, &val);
356 if (ret != EOK || !val) {
357 printf("Device %s does not support playback\n", device);
358 ret = ENOTSUP;
359 goto close_session;
360 }
361
362 char *info = NULL;
363 ret = audio_pcm_get_info_str(session, &info);
364 if (ret != EOK) {
365 printf("Failed to get PCM info: %s.\n", str_error(ret));
366 goto close_session;
367 }
368 printf("Playing on %s.\n", info);
369 free(info);
370
371 playback_t pb;
372 playback_initialize(&pb, session);
373
374 ret = audio_pcm_get_buffer(pb.device, &pb.buffer.base, &pb.buffer.size);
375 if (ret != EOK) {
376 printf("Failed to get PCM buffer: %s.\n", str_error(ret));
377 goto close_session;
378 }
379 printf("Buffer: %p %zu.\n", pb.buffer.base, pb.buffer.size);
380
381 pb.source = fopen(file, "rb");
382 if (pb.source == NULL) {
383 ret = ENOENT;
384 printf("Failed to open file: %s.\n", file);
385 goto cleanup;
386 }
387
388 wave_header_t header;
389 fread(&header, sizeof(header), 1, pb.source);
390 const char *error;
391 ret = wav_parse_header(&header, NULL, NULL,
392 &pb.f.channels, &pb.f.sampling_rate, &pb.f.sample_format, &error);
393 if (ret != EOK) {
394 printf("Error parsing wav header: %s.\n", error);
395 goto cleanup;
396 }
397 ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_BUFFER_POS, &val);
398 if (ret == EOK && val) {
399 play(&pb);
400 } else {
401 ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_INTERRUPT, &val);
402 if (ret == EOK && val)
403 play_fragment(&pb);
404 else
405 printf("Neither playing method is supported");
406 }
407
408cleanup:
409 fclose(pb.source);
410 as_area_destroy(pb.buffer.base);
411 audio_pcm_release_buffer(pb.device);
412close_session:
413 audio_pcm_close(session);
414 return ret == EOK ? 0 : 1;
415}
416/**
417 * @}
418 */
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