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/*
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* QEMU ALSA audio driver
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*
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* Copyright (c) 2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <alsa/asoundlib.h> |
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#include "qemu-common.h" |
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#include "qemu-char.h" |
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#include "audio.h" |
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|
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#if QEMU_GNUC_PREREQ(4, 3) |
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#pragma GCC diagnostic ignored "-Waddress" |
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#endif
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#define AUDIO_CAP "alsa" |
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#include "audio_int.h" |
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|
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struct pollhlp {
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snd_pcm_t *handle; |
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struct pollfd *pfds;
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int count;
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int mask;
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}; |
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|
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typedef struct ALSAVoiceOut { |
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HWVoiceOut hw; |
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void *pcm_buf;
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snd_pcm_t *handle; |
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struct pollhlp pollhlp;
|
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} ALSAVoiceOut; |
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|
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typedef struct ALSAVoiceIn { |
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HWVoiceIn hw; |
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snd_pcm_t *handle; |
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void *pcm_buf;
|
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struct pollhlp pollhlp;
|
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} ALSAVoiceIn; |
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|
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static struct { |
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int size_in_usec_in;
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int size_in_usec_out;
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const char *pcm_name_in; |
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const char *pcm_name_out; |
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unsigned int buffer_size_in; |
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unsigned int period_size_in; |
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unsigned int buffer_size_out; |
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unsigned int period_size_out; |
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unsigned int threshold; |
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|
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int buffer_size_in_overridden;
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int period_size_in_overridden;
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|
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int buffer_size_out_overridden;
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int period_size_out_overridden;
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int verbose;
|
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} conf = { |
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.buffer_size_out = 1024,
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.pcm_name_out = "default",
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.pcm_name_in = "default",
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}; |
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|
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struct alsa_params_req {
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int freq;
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snd_pcm_format_t fmt; |
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int nchannels;
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int size_in_usec;
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int override_mask;
|
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unsigned int buffer_size; |
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unsigned int period_size; |
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}; |
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|
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struct alsa_params_obt {
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int freq;
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audfmt_e fmt; |
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int endianness;
|
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int nchannels;
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snd_pcm_uframes_t samples; |
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}; |
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|
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static void GCC_FMT_ATTR (2, 3) alsa_logerr (int err, const char *fmt, ...) |
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{ |
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va_list ap; |
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|
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va_start (ap, fmt); |
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AUD_vlog (AUDIO_CAP, fmt, ap); |
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va_end (ap); |
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|
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AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err));
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} |
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|
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static void GCC_FMT_ATTR (3, 4) alsa_logerr2 ( |
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int err,
|
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const char *typ, |
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const char *fmt, |
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... |
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) |
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{ |
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va_list ap; |
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|
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AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
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|
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va_start (ap, fmt); |
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AUD_vlog (AUDIO_CAP, fmt, ap); |
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va_end (ap); |
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|
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AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err));
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} |
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|
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static void alsa_fini_poll (struct pollhlp *hlp) |
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{ |
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int i;
|
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struct pollfd *pfds = hlp->pfds;
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|
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if (pfds) {
|
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for (i = 0; i < hlp->count; ++i) { |
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qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL); |
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} |
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qemu_free (pfds); |
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} |
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hlp->pfds = NULL;
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hlp->count = 0;
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hlp->handle = NULL;
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} |
142 |
|
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static void alsa_anal_close1 (snd_pcm_t **handlep) |
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{ |
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int err = snd_pcm_close (*handlep);
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if (err) {
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alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep);
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} |
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*handlep = NULL;
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} |
151 |
|
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static void alsa_anal_close (snd_pcm_t **handlep, struct pollhlp *hlp) |
153 |
{ |
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alsa_fini_poll (hlp); |
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alsa_anal_close1 (handlep); |
156 |
} |
157 |
|
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static int alsa_recover (snd_pcm_t *handle) |
159 |
{ |
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int err = snd_pcm_prepare (handle);
|
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if (err < 0) { |
162 |
alsa_logerr (err, "Failed to prepare handle %p\n", handle);
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return -1; |
164 |
} |
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return 0; |
166 |
} |
167 |
|
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static int alsa_resume (snd_pcm_t *handle) |
169 |
{ |
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int err = snd_pcm_resume (handle);
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if (err < 0) { |
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alsa_logerr (err, "Failed to resume handle %p\n", handle);
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return -1; |
174 |
} |
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return 0; |
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} |
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|
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static void alsa_poll_handler (void *opaque) |
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{ |
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int err, count;
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snd_pcm_state_t state; |
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struct pollhlp *hlp = opaque;
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unsigned short revents; |
184 |
|
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count = poll (hlp->pfds, hlp->count, 0);
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if (count < 0) { |
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dolog ("alsa_poll_handler: poll %s\n", strerror (errno));
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return;
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} |
190 |
|
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if (!count) {
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return;
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} |
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|
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/* XXX: ALSA example uses initial count, not the one returned by
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poll, correct? */
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err = snd_pcm_poll_descriptors_revents (hlp->handle, hlp->pfds, |
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hlp->count, &revents); |
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if (err < 0) { |
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alsa_logerr (err, "snd_pcm_poll_descriptors_revents");
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return;
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} |
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if (!(revents & hlp->mask)) {
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if (conf.verbose) {
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dolog ("revents = %d\n", revents);
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} |
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return;
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} |
210 |
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state = snd_pcm_state (hlp->handle); |
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switch (state) {
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case SND_PCM_STATE_XRUN:
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alsa_recover (hlp->handle); |
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break;
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|
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case SND_PCM_STATE_SUSPENDED:
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alsa_resume (hlp->handle); |
219 |
break;
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|
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case SND_PCM_STATE_PREPARED:
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audio_run ("alsa run (prepared)");
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break;
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case SND_PCM_STATE_RUNNING:
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audio_run ("alsa run (running)");
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break;
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|
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default:
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dolog ("Unexpected state %d\n", state);
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} |
232 |
} |
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|
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static int alsa_poll_helper (snd_pcm_t *handle, struct pollhlp *hlp, int mask) |
235 |
{ |
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int i, count, err;
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struct pollfd *pfds;
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|
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count = snd_pcm_poll_descriptors_count (handle); |
240 |
if (count <= 0) { |
241 |
dolog ("Could not initialize poll mode\n"
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"Invalid number of poll descriptors %d\n", count);
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return -1; |
244 |
} |
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|
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pfds = audio_calloc ("alsa_poll_helper", count, sizeof (*pfds)); |
247 |
if (!pfds) {
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dolog ("Could not initialize poll mode\n");
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return -1; |
250 |
} |
251 |
|
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err = snd_pcm_poll_descriptors (handle, pfds, count); |
253 |
if (err < 0) { |
254 |
alsa_logerr (err, "Could not initialize poll mode\n"
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"Could not obtain poll descriptors\n");
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qemu_free (pfds); |
257 |
return -1; |
258 |
} |
259 |
|
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for (i = 0; i < count; ++i) { |
261 |
if (pfds[i].events & POLLIN) {
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err = qemu_set_fd_handler (pfds[i].fd, alsa_poll_handler, |
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NULL, hlp);
|
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} |
265 |
if (pfds[i].events & POLLOUT) {
|
266 |
if (conf.verbose) {
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dolog ("POLLOUT %d %d\n", i, pfds[i].fd);
|
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} |
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err = qemu_set_fd_handler (pfds[i].fd, NULL,
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alsa_poll_handler, hlp); |
271 |
} |
272 |
if (conf.verbose) {
|
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dolog ("Set handler events=%#x index=%d fd=%d err=%d\n",
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pfds[i].events, i, pfds[i].fd, err); |
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} |
276 |
|
277 |
if (err) {
|
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dolog ("Failed to set handler events=%#x index=%d fd=%d err=%d\n",
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pfds[i].events, i, pfds[i].fd, err); |
280 |
|
281 |
while (i--) {
|
282 |
qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL); |
283 |
} |
284 |
qemu_free (pfds); |
285 |
return -1; |
286 |
} |
287 |
} |
288 |
hlp->pfds = pfds; |
289 |
hlp->count = count; |
290 |
hlp->handle = handle; |
291 |
hlp->mask = mask; |
292 |
return 0; |
293 |
} |
294 |
|
295 |
static int alsa_poll_out (HWVoiceOut *hw) |
296 |
{ |
297 |
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
298 |
|
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return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLOUT);
|
300 |
} |
301 |
|
302 |
static int alsa_poll_in (HWVoiceIn *hw) |
303 |
{ |
304 |
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
305 |
|
306 |
return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLIN);
|
307 |
} |
308 |
|
309 |
static int alsa_write (SWVoiceOut *sw, void *buf, int len) |
310 |
{ |
311 |
return audio_pcm_sw_write (sw, buf, len);
|
312 |
} |
313 |
|
314 |
static snd_pcm_format_t aud_to_alsafmt (audfmt_e fmt)
|
315 |
{ |
316 |
switch (fmt) {
|
317 |
case AUD_FMT_S8:
|
318 |
return SND_PCM_FORMAT_S8;
|
319 |
|
320 |
case AUD_FMT_U8:
|
321 |
return SND_PCM_FORMAT_U8;
|
322 |
|
323 |
case AUD_FMT_S16:
|
324 |
return SND_PCM_FORMAT_S16_LE;
|
325 |
|
326 |
case AUD_FMT_U16:
|
327 |
return SND_PCM_FORMAT_U16_LE;
|
328 |
|
329 |
case AUD_FMT_S32:
|
330 |
return SND_PCM_FORMAT_S32_LE;
|
331 |
|
332 |
case AUD_FMT_U32:
|
333 |
return SND_PCM_FORMAT_U32_LE;
|
334 |
|
335 |
default:
|
336 |
dolog ("Internal logic error: Bad audio format %d\n", fmt);
|
337 |
#ifdef DEBUG_AUDIO
|
338 |
abort (); |
339 |
#endif
|
340 |
return SND_PCM_FORMAT_U8;
|
341 |
} |
342 |
} |
343 |
|
344 |
static int alsa_to_audfmt (snd_pcm_format_t alsafmt, audfmt_e *fmt, |
345 |
int *endianness)
|
346 |
{ |
347 |
switch (alsafmt) {
|
348 |
case SND_PCM_FORMAT_S8:
|
349 |
*endianness = 0;
|
350 |
*fmt = AUD_FMT_S8; |
351 |
break;
|
352 |
|
353 |
case SND_PCM_FORMAT_U8:
|
354 |
*endianness = 0;
|
355 |
*fmt = AUD_FMT_U8; |
356 |
break;
|
357 |
|
358 |
case SND_PCM_FORMAT_S16_LE:
|
359 |
*endianness = 0;
|
360 |
*fmt = AUD_FMT_S16; |
361 |
break;
|
362 |
|
363 |
case SND_PCM_FORMAT_U16_LE:
|
364 |
*endianness = 0;
|
365 |
*fmt = AUD_FMT_U16; |
366 |
break;
|
367 |
|
368 |
case SND_PCM_FORMAT_S16_BE:
|
369 |
*endianness = 1;
|
370 |
*fmt = AUD_FMT_S16; |
371 |
break;
|
372 |
|
373 |
case SND_PCM_FORMAT_U16_BE:
|
374 |
*endianness = 1;
|
375 |
*fmt = AUD_FMT_U16; |
376 |
break;
|
377 |
|
378 |
case SND_PCM_FORMAT_S32_LE:
|
379 |
*endianness = 0;
|
380 |
*fmt = AUD_FMT_S32; |
381 |
break;
|
382 |
|
383 |
case SND_PCM_FORMAT_U32_LE:
|
384 |
*endianness = 0;
|
385 |
*fmt = AUD_FMT_U32; |
386 |
break;
|
387 |
|
388 |
case SND_PCM_FORMAT_S32_BE:
|
389 |
*endianness = 1;
|
390 |
*fmt = AUD_FMT_S32; |
391 |
break;
|
392 |
|
393 |
case SND_PCM_FORMAT_U32_BE:
|
394 |
*endianness = 1;
|
395 |
*fmt = AUD_FMT_U32; |
396 |
break;
|
397 |
|
398 |
default:
|
399 |
dolog ("Unrecognized audio format %d\n", alsafmt);
|
400 |
return -1; |
401 |
} |
402 |
|
403 |
return 0; |
404 |
} |
405 |
|
406 |
static void alsa_dump_info (struct alsa_params_req *req, |
407 |
struct alsa_params_obt *obt)
|
408 |
{ |
409 |
dolog ("parameter | requested value | obtained value\n");
|
410 |
dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
|
411 |
dolog ("channels | %10d | %10d\n",
|
412 |
req->nchannels, obt->nchannels); |
413 |
dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
|
414 |
dolog ("============================================\n");
|
415 |
dolog ("requested: buffer size %d period size %d\n",
|
416 |
req->buffer_size, req->period_size); |
417 |
dolog ("obtained: samples %ld\n", obt->samples);
|
418 |
} |
419 |
|
420 |
static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold) |
421 |
{ |
422 |
int err;
|
423 |
snd_pcm_sw_params_t *sw_params; |
424 |
|
425 |
snd_pcm_sw_params_alloca (&sw_params); |
426 |
|
427 |
err = snd_pcm_sw_params_current (handle, sw_params); |
428 |
if (err < 0) { |
429 |
dolog ("Could not fully initialize DAC\n");
|
430 |
alsa_logerr (err, "Failed to get current software parameters\n");
|
431 |
return;
|
432 |
} |
433 |
|
434 |
err = snd_pcm_sw_params_set_start_threshold (handle, sw_params, threshold); |
435 |
if (err < 0) { |
436 |
dolog ("Could not fully initialize DAC\n");
|
437 |
alsa_logerr (err, "Failed to set software threshold to %ld\n",
|
438 |
threshold); |
439 |
return;
|
440 |
} |
441 |
|
442 |
err = snd_pcm_sw_params (handle, sw_params); |
443 |
if (err < 0) { |
444 |
dolog ("Could not fully initialize DAC\n");
|
445 |
alsa_logerr (err, "Failed to set software parameters\n");
|
446 |
return;
|
447 |
} |
448 |
} |
449 |
|
450 |
static int alsa_open (int in, struct alsa_params_req *req, |
451 |
struct alsa_params_obt *obt, snd_pcm_t **handlep)
|
452 |
{ |
453 |
snd_pcm_t *handle; |
454 |
snd_pcm_hw_params_t *hw_params; |
455 |
int err;
|
456 |
int size_in_usec;
|
457 |
unsigned int freq, nchannels; |
458 |
const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out; |
459 |
snd_pcm_uframes_t obt_buffer_size; |
460 |
const char *typ = in ? "ADC" : "DAC"; |
461 |
snd_pcm_format_t obtfmt; |
462 |
|
463 |
freq = req->freq; |
464 |
nchannels = req->nchannels; |
465 |
size_in_usec = req->size_in_usec; |
466 |
|
467 |
snd_pcm_hw_params_alloca (&hw_params); |
468 |
|
469 |
err = snd_pcm_open ( |
470 |
&handle, |
471 |
pcm_name, |
472 |
in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, |
473 |
SND_PCM_NONBLOCK |
474 |
); |
475 |
if (err < 0) { |
476 |
alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name);
|
477 |
return -1; |
478 |
} |
479 |
|
480 |
err = snd_pcm_hw_params_any (handle, hw_params); |
481 |
if (err < 0) { |
482 |
alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n");
|
483 |
goto err;
|
484 |
} |
485 |
|
486 |
err = snd_pcm_hw_params_set_access ( |
487 |
handle, |
488 |
hw_params, |
489 |
SND_PCM_ACCESS_RW_INTERLEAVED |
490 |
); |
491 |
if (err < 0) { |
492 |
alsa_logerr2 (err, typ, "Failed to set access type\n");
|
493 |
goto err;
|
494 |
} |
495 |
|
496 |
err = snd_pcm_hw_params_set_format (handle, hw_params, req->fmt); |
497 |
if (err < 0 && conf.verbose) { |
498 |
alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt);
|
499 |
} |
500 |
|
501 |
err = snd_pcm_hw_params_set_rate_near (handle, hw_params, &freq, 0);
|
502 |
if (err < 0) { |
503 |
alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq);
|
504 |
goto err;
|
505 |
} |
506 |
|
507 |
err = snd_pcm_hw_params_set_channels_near ( |
508 |
handle, |
509 |
hw_params, |
510 |
&nchannels |
511 |
); |
512 |
if (err < 0) { |
513 |
alsa_logerr2 (err, typ, "Failed to set number of channels %d\n",
|
514 |
req->nchannels); |
515 |
goto err;
|
516 |
} |
517 |
|
518 |
if (nchannels != 1 && nchannels != 2) { |
519 |
alsa_logerr2 (err, typ, |
520 |
"Can not handle obtained number of channels %d\n",
|
521 |
nchannels); |
522 |
goto err;
|
523 |
} |
524 |
|
525 |
if (req->buffer_size) {
|
526 |
unsigned long obt; |
527 |
|
528 |
if (size_in_usec) {
|
529 |
int dir = 0; |
530 |
unsigned int btime = req->buffer_size; |
531 |
|
532 |
err = snd_pcm_hw_params_set_buffer_time_near ( |
533 |
handle, |
534 |
hw_params, |
535 |
&btime, |
536 |
&dir |
537 |
); |
538 |
obt = btime; |
539 |
} |
540 |
else {
|
541 |
snd_pcm_uframes_t bsize = req->buffer_size; |
542 |
|
543 |
err = snd_pcm_hw_params_set_buffer_size_near ( |
544 |
handle, |
545 |
hw_params, |
546 |
&bsize |
547 |
); |
548 |
obt = bsize; |
549 |
} |
550 |
if (err < 0) { |
551 |
alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n",
|
552 |
size_in_usec ? "time" : "size", req->buffer_size); |
553 |
goto err;
|
554 |
} |
555 |
|
556 |
if ((req->override_mask & 2) && (obt - req->buffer_size)) |
557 |
dolog ("Requested buffer %s %u was rejected, using %lu\n",
|
558 |
size_in_usec ? "time" : "size", req->buffer_size, obt); |
559 |
} |
560 |
|
561 |
if (req->period_size) {
|
562 |
unsigned long obt; |
563 |
|
564 |
if (size_in_usec) {
|
565 |
int dir = 0; |
566 |
unsigned int ptime = req->period_size; |
567 |
|
568 |
err = snd_pcm_hw_params_set_period_time_near ( |
569 |
handle, |
570 |
hw_params, |
571 |
&ptime, |
572 |
&dir |
573 |
); |
574 |
obt = ptime; |
575 |
} |
576 |
else {
|
577 |
int dir = 0; |
578 |
snd_pcm_uframes_t psize = req->period_size; |
579 |
|
580 |
err = snd_pcm_hw_params_set_period_size_near ( |
581 |
handle, |
582 |
hw_params, |
583 |
&psize, |
584 |
&dir |
585 |
); |
586 |
obt = psize; |
587 |
} |
588 |
|
589 |
if (err < 0) { |
590 |
alsa_logerr2 (err, typ, "Failed to set period %s to %d\n",
|
591 |
size_in_usec ? "time" : "size", req->period_size); |
592 |
goto err;
|
593 |
} |
594 |
|
595 |
if ((req->override_mask & 1) && (obt - req->period_size)) |
596 |
dolog ("Requested period %s %u was rejected, using %lu\n",
|
597 |
size_in_usec ? "time" : "size", req->period_size, obt); |
598 |
} |
599 |
|
600 |
err = snd_pcm_hw_params (handle, hw_params); |
601 |
if (err < 0) { |
602 |
alsa_logerr2 (err, typ, "Failed to apply audio parameters\n");
|
603 |
goto err;
|
604 |
} |
605 |
|
606 |
err = snd_pcm_hw_params_get_buffer_size (hw_params, &obt_buffer_size); |
607 |
if (err < 0) { |
608 |
alsa_logerr2 (err, typ, "Failed to get buffer size\n");
|
609 |
goto err;
|
610 |
} |
611 |
|
612 |
err = snd_pcm_hw_params_get_format (hw_params, &obtfmt); |
613 |
if (err < 0) { |
614 |
alsa_logerr2 (err, typ, "Failed to get format\n");
|
615 |
goto err;
|
616 |
} |
617 |
|
618 |
if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) {
|
619 |
dolog ("Invalid format was returned %d\n", obtfmt);
|
620 |
goto err;
|
621 |
} |
622 |
|
623 |
err = snd_pcm_prepare (handle); |
624 |
if (err < 0) { |
625 |
alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle);
|
626 |
goto err;
|
627 |
} |
628 |
|
629 |
if (!in && conf.threshold) {
|
630 |
snd_pcm_uframes_t threshold; |
631 |
int bytes_per_sec;
|
632 |
|
633 |
bytes_per_sec = freq << (nchannels == 2);
|
634 |
|
635 |
switch (obt->fmt) {
|
636 |
case AUD_FMT_S8:
|
637 |
case AUD_FMT_U8:
|
638 |
break;
|
639 |
|
640 |
case AUD_FMT_S16:
|
641 |
case AUD_FMT_U16:
|
642 |
bytes_per_sec <<= 1;
|
643 |
break;
|
644 |
|
645 |
case AUD_FMT_S32:
|
646 |
case AUD_FMT_U32:
|
647 |
bytes_per_sec <<= 2;
|
648 |
break;
|
649 |
} |
650 |
|
651 |
threshold = (conf.threshold * bytes_per_sec) / 1000;
|
652 |
alsa_set_threshold (handle, threshold); |
653 |
} |
654 |
|
655 |
obt->nchannels = nchannels; |
656 |
obt->freq = freq; |
657 |
obt->samples = obt_buffer_size; |
658 |
|
659 |
*handlep = handle; |
660 |
|
661 |
if (conf.verbose &&
|
662 |
(obt->fmt != req->fmt || |
663 |
obt->nchannels != req->nchannels || |
664 |
obt->freq != req->freq)) { |
665 |
dolog ("Audio paramters for %s\n", typ);
|
666 |
alsa_dump_info (req, obt); |
667 |
} |
668 |
|
669 |
#ifdef DEBUG
|
670 |
alsa_dump_info (req, obt); |
671 |
#endif
|
672 |
return 0; |
673 |
|
674 |
err:
|
675 |
alsa_anal_close1 (&handle); |
676 |
return -1; |
677 |
} |
678 |
|
679 |
static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle)
|
680 |
{ |
681 |
snd_pcm_sframes_t avail; |
682 |
|
683 |
avail = snd_pcm_avail_update (handle); |
684 |
if (avail < 0) { |
685 |
if (avail == -EPIPE) {
|
686 |
if (!alsa_recover (handle)) {
|
687 |
avail = snd_pcm_avail_update (handle); |
688 |
} |
689 |
} |
690 |
|
691 |
if (avail < 0) { |
692 |
alsa_logerr (avail, |
693 |
"Could not obtain number of available frames\n");
|
694 |
return -1; |
695 |
} |
696 |
} |
697 |
|
698 |
return avail;
|
699 |
} |
700 |
|
701 |
static int alsa_run_out (HWVoiceOut *hw) |
702 |
{ |
703 |
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
704 |
int rpos, live, decr;
|
705 |
int samples;
|
706 |
uint8_t *dst; |
707 |
struct st_sample *src;
|
708 |
snd_pcm_sframes_t avail; |
709 |
|
710 |
live = audio_pcm_hw_get_live_out (hw); |
711 |
if (!live) {
|
712 |
return 0; |
713 |
} |
714 |
|
715 |
avail = alsa_get_avail (alsa->handle); |
716 |
if (avail < 0) { |
717 |
dolog ("Could not get number of available playback frames\n");
|
718 |
return 0; |
719 |
} |
720 |
|
721 |
decr = audio_MIN (live, avail); |
722 |
samples = decr; |
723 |
rpos = hw->rpos; |
724 |
while (samples) {
|
725 |
int left_till_end_samples = hw->samples - rpos;
|
726 |
int len = audio_MIN (samples, left_till_end_samples);
|
727 |
snd_pcm_sframes_t written; |
728 |
|
729 |
src = hw->mix_buf + rpos; |
730 |
dst = advance (alsa->pcm_buf, rpos << hw->info.shift); |
731 |
|
732 |
hw->clip (dst, src, len); |
733 |
|
734 |
while (len) {
|
735 |
written = snd_pcm_writei (alsa->handle, dst, len); |
736 |
|
737 |
if (written <= 0) { |
738 |
switch (written) {
|
739 |
case 0: |
740 |
if (conf.verbose) {
|
741 |
dolog ("Failed to write %d frames (wrote zero)\n", len);
|
742 |
} |
743 |
goto exit;
|
744 |
|
745 |
case -EPIPE:
|
746 |
if (alsa_recover (alsa->handle)) {
|
747 |
alsa_logerr (written, "Failed to write %d frames\n",
|
748 |
len); |
749 |
goto exit;
|
750 |
} |
751 |
if (conf.verbose) {
|
752 |
dolog ("Recovering from playback xrun\n");
|
753 |
} |
754 |
continue;
|
755 |
|
756 |
case -ESTRPIPE:
|
757 |
/* stream is suspended and waiting for an
|
758 |
application recovery */
|
759 |
if (alsa_resume (alsa->handle)) {
|
760 |
alsa_logerr (written, "Failed to write %d frames\n",
|
761 |
len); |
762 |
goto exit;
|
763 |
} |
764 |
if (conf.verbose) {
|
765 |
dolog ("Resuming suspended output stream\n");
|
766 |
} |
767 |
continue;
|
768 |
|
769 |
case -EAGAIN:
|
770 |
goto exit;
|
771 |
|
772 |
default:
|
773 |
alsa_logerr (written, "Failed to write %d frames to %p\n",
|
774 |
len, dst); |
775 |
goto exit;
|
776 |
} |
777 |
} |
778 |
|
779 |
rpos = (rpos + written) % hw->samples; |
780 |
samples -= written; |
781 |
len -= written; |
782 |
dst = advance (dst, written << hw->info.shift); |
783 |
src += written; |
784 |
} |
785 |
} |
786 |
|
787 |
exit:
|
788 |
hw->rpos = rpos; |
789 |
return decr;
|
790 |
} |
791 |
|
792 |
static void alsa_fini_out (HWVoiceOut *hw) |
793 |
{ |
794 |
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
795 |
|
796 |
ldebug ("alsa_fini\n");
|
797 |
alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
798 |
|
799 |
if (alsa->pcm_buf) {
|
800 |
qemu_free (alsa->pcm_buf); |
801 |
alsa->pcm_buf = NULL;
|
802 |
} |
803 |
} |
804 |
|
805 |
static int alsa_init_out (HWVoiceOut *hw, struct audsettings *as) |
806 |
{ |
807 |
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
808 |
struct alsa_params_req req;
|
809 |
struct alsa_params_obt obt;
|
810 |
snd_pcm_t *handle; |
811 |
struct audsettings obt_as;
|
812 |
|
813 |
req.fmt = aud_to_alsafmt (as->fmt); |
814 |
req.freq = as->freq; |
815 |
req.nchannels = as->nchannels; |
816 |
req.period_size = conf.period_size_out; |
817 |
req.buffer_size = conf.buffer_size_out; |
818 |
req.size_in_usec = conf.size_in_usec_out; |
819 |
req.override_mask = |
820 |
(conf.period_size_out_overridden ? 1 : 0) | |
821 |
(conf.buffer_size_out_overridden ? 2 : 0); |
822 |
|
823 |
if (alsa_open (0, &req, &obt, &handle)) { |
824 |
return -1; |
825 |
} |
826 |
|
827 |
obt_as.freq = obt.freq; |
828 |
obt_as.nchannels = obt.nchannels; |
829 |
obt_as.fmt = obt.fmt; |
830 |
obt_as.endianness = obt.endianness; |
831 |
|
832 |
audio_pcm_init_info (&hw->info, &obt_as); |
833 |
hw->samples = obt.samples; |
834 |
|
835 |
alsa->pcm_buf = audio_calloc (AUDIO_FUNC, obt.samples, 1 << hw->info.shift);
|
836 |
if (!alsa->pcm_buf) {
|
837 |
dolog ("Could not allocate DAC buffer (%d samples, each %d bytes)\n",
|
838 |
hw->samples, 1 << hw->info.shift);
|
839 |
alsa_anal_close1 (&handle); |
840 |
return -1; |
841 |
} |
842 |
|
843 |
alsa->handle = handle; |
844 |
return 0; |
845 |
} |
846 |
|
847 |
static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause) |
848 |
{ |
849 |
int err;
|
850 |
|
851 |
if (pause) {
|
852 |
err = snd_pcm_drop (handle); |
853 |
if (err < 0) { |
854 |
alsa_logerr (err, "Could not stop %s\n", typ);
|
855 |
return -1; |
856 |
} |
857 |
} |
858 |
else {
|
859 |
err = snd_pcm_prepare (handle); |
860 |
if (err < 0) { |
861 |
alsa_logerr (err, "Could not prepare handle for %s\n", typ);
|
862 |
return -1; |
863 |
} |
864 |
} |
865 |
|
866 |
return 0; |
867 |
} |
868 |
|
869 |
static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...) |
870 |
{ |
871 |
va_list ap; |
872 |
int poll_mode;
|
873 |
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
874 |
|
875 |
va_start (ap, cmd); |
876 |
poll_mode = va_arg (ap, int);
|
877 |
va_end (ap); |
878 |
|
879 |
switch (cmd) {
|
880 |
case VOICE_ENABLE:
|
881 |
ldebug ("enabling voice\n");
|
882 |
if (poll_mode && alsa_poll_out (hw)) {
|
883 |
poll_mode = 0;
|
884 |
} |
885 |
hw->poll_mode = poll_mode; |
886 |
return alsa_voice_ctl (alsa->handle, "playback", 0); |
887 |
|
888 |
case VOICE_DISABLE:
|
889 |
ldebug ("disabling voice\n");
|
890 |
return alsa_voice_ctl (alsa->handle, "playback", 1); |
891 |
} |
892 |
|
893 |
return -1; |
894 |
} |
895 |
|
896 |
static int alsa_init_in (HWVoiceIn *hw, struct audsettings *as) |
897 |
{ |
898 |
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
899 |
struct alsa_params_req req;
|
900 |
struct alsa_params_obt obt;
|
901 |
snd_pcm_t *handle; |
902 |
struct audsettings obt_as;
|
903 |
|
904 |
req.fmt = aud_to_alsafmt (as->fmt); |
905 |
req.freq = as->freq; |
906 |
req.nchannels = as->nchannels; |
907 |
req.period_size = conf.period_size_in; |
908 |
req.buffer_size = conf.buffer_size_in; |
909 |
req.size_in_usec = conf.size_in_usec_in; |
910 |
req.override_mask = |
911 |
(conf.period_size_in_overridden ? 1 : 0) | |
912 |
(conf.buffer_size_in_overridden ? 2 : 0); |
913 |
|
914 |
if (alsa_open (1, &req, &obt, &handle)) { |
915 |
return -1; |
916 |
} |
917 |
|
918 |
obt_as.freq = obt.freq; |
919 |
obt_as.nchannels = obt.nchannels; |
920 |
obt_as.fmt = obt.fmt; |
921 |
obt_as.endianness = obt.endianness; |
922 |
|
923 |
audio_pcm_init_info (&hw->info, &obt_as); |
924 |
hw->samples = obt.samples; |
925 |
|
926 |
alsa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
927 |
if (!alsa->pcm_buf) {
|
928 |
dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
|
929 |
hw->samples, 1 << hw->info.shift);
|
930 |
alsa_anal_close1 (&handle); |
931 |
return -1; |
932 |
} |
933 |
|
934 |
alsa->handle = handle; |
935 |
return 0; |
936 |
} |
937 |
|
938 |
static void alsa_fini_in (HWVoiceIn *hw) |
939 |
{ |
940 |
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
941 |
|
942 |
alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
943 |
|
944 |
if (alsa->pcm_buf) {
|
945 |
qemu_free (alsa->pcm_buf); |
946 |
alsa->pcm_buf = NULL;
|
947 |
} |
948 |
} |
949 |
|
950 |
static int alsa_run_in (HWVoiceIn *hw) |
951 |
{ |
952 |
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
953 |
int hwshift = hw->info.shift;
|
954 |
int i;
|
955 |
int live = audio_pcm_hw_get_live_in (hw);
|
956 |
int dead = hw->samples - live;
|
957 |
int decr;
|
958 |
struct {
|
959 |
int add;
|
960 |
int len;
|
961 |
} bufs[2] = {
|
962 |
{ .add = hw->wpos, .len = 0 },
|
963 |
{ .add = 0, .len = 0 } |
964 |
}; |
965 |
snd_pcm_sframes_t avail; |
966 |
snd_pcm_uframes_t read_samples = 0;
|
967 |
|
968 |
if (!dead) {
|
969 |
return 0; |
970 |
} |
971 |
|
972 |
avail = alsa_get_avail (alsa->handle); |
973 |
if (avail < 0) { |
974 |
dolog ("Could not get number of captured frames\n");
|
975 |
return 0; |
976 |
} |
977 |
|
978 |
if (!avail) {
|
979 |
snd_pcm_state_t state; |
980 |
|
981 |
state = snd_pcm_state (alsa->handle); |
982 |
switch (state) {
|
983 |
case SND_PCM_STATE_PREPARED:
|
984 |
avail = hw->samples; |
985 |
break;
|
986 |
case SND_PCM_STATE_SUSPENDED:
|
987 |
/* stream is suspended and waiting for an application recovery */
|
988 |
if (alsa_resume (alsa->handle)) {
|
989 |
dolog ("Failed to resume suspended input stream\n");
|
990 |
return 0; |
991 |
} |
992 |
if (conf.verbose) {
|
993 |
dolog ("Resuming suspended input stream\n");
|
994 |
} |
995 |
break;
|
996 |
default:
|
997 |
if (conf.verbose) {
|
998 |
dolog ("No frames available and ALSA state is %d\n", state);
|
999 |
} |
1000 |
return 0; |
1001 |
} |
1002 |
} |
1003 |
|
1004 |
decr = audio_MIN (dead, avail); |
1005 |
if (!decr) {
|
1006 |
return 0; |
1007 |
} |
1008 |
|
1009 |
if (hw->wpos + decr > hw->samples) {
|
1010 |
bufs[0].len = (hw->samples - hw->wpos);
|
1011 |
bufs[1].len = (decr - (hw->samples - hw->wpos));
|
1012 |
} |
1013 |
else {
|
1014 |
bufs[0].len = decr;
|
1015 |
} |
1016 |
|
1017 |
for (i = 0; i < 2; ++i) { |
1018 |
void *src;
|
1019 |
struct st_sample *dst;
|
1020 |
snd_pcm_sframes_t nread; |
1021 |
snd_pcm_uframes_t len; |
1022 |
|
1023 |
len = bufs[i].len; |
1024 |
|
1025 |
src = advance (alsa->pcm_buf, bufs[i].add << hwshift); |
1026 |
dst = hw->conv_buf + bufs[i].add; |
1027 |
|
1028 |
while (len) {
|
1029 |
nread = snd_pcm_readi (alsa->handle, src, len); |
1030 |
|
1031 |
if (nread <= 0) { |
1032 |
switch (nread) {
|
1033 |
case 0: |
1034 |
if (conf.verbose) {
|
1035 |
dolog ("Failed to read %ld frames (read zero)\n", len);
|
1036 |
} |
1037 |
goto exit;
|
1038 |
|
1039 |
case -EPIPE:
|
1040 |
if (alsa_recover (alsa->handle)) {
|
1041 |
alsa_logerr (nread, "Failed to read %ld frames\n", len);
|
1042 |
goto exit;
|
1043 |
} |
1044 |
if (conf.verbose) {
|
1045 |
dolog ("Recovering from capture xrun\n");
|
1046 |
} |
1047 |
continue;
|
1048 |
|
1049 |
case -EAGAIN:
|
1050 |
goto exit;
|
1051 |
|
1052 |
default:
|
1053 |
alsa_logerr ( |
1054 |
nread, |
1055 |
"Failed to read %ld frames from %p\n",
|
1056 |
len, |
1057 |
src |
1058 |
); |
1059 |
goto exit;
|
1060 |
} |
1061 |
} |
1062 |
|
1063 |
hw->conv (dst, src, nread, &nominal_volume); |
1064 |
|
1065 |
src = advance (src, nread << hwshift); |
1066 |
dst += nread; |
1067 |
|
1068 |
read_samples += nread; |
1069 |
len -= nread; |
1070 |
} |
1071 |
} |
1072 |
|
1073 |
exit:
|
1074 |
hw->wpos = (hw->wpos + read_samples) % hw->samples; |
1075 |
return read_samples;
|
1076 |
} |
1077 |
|
1078 |
static int alsa_read (SWVoiceIn *sw, void *buf, int size) |
1079 |
{ |
1080 |
return audio_pcm_sw_read (sw, buf, size);
|
1081 |
} |
1082 |
|
1083 |
static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...) |
1084 |
{ |
1085 |
va_list ap; |
1086 |
int poll_mode;
|
1087 |
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
1088 |
|
1089 |
va_start (ap, cmd); |
1090 |
poll_mode = va_arg (ap, int);
|
1091 |
va_end (ap); |
1092 |
|
1093 |
switch (cmd) {
|
1094 |
case VOICE_ENABLE:
|
1095 |
ldebug ("enabling voice\n");
|
1096 |
if (poll_mode && alsa_poll_in (hw)) {
|
1097 |
poll_mode = 0;
|
1098 |
} |
1099 |
hw->poll_mode = poll_mode; |
1100 |
|
1101 |
return alsa_voice_ctl (alsa->handle, "capture", 0); |
1102 |
|
1103 |
case VOICE_DISABLE:
|
1104 |
ldebug ("disabling voice\n");
|
1105 |
if (hw->poll_mode) {
|
1106 |
hw->poll_mode = 0;
|
1107 |
alsa_fini_poll (&alsa->pollhlp); |
1108 |
} |
1109 |
return alsa_voice_ctl (alsa->handle, "capture", 1); |
1110 |
} |
1111 |
|
1112 |
return -1; |
1113 |
} |
1114 |
|
1115 |
static void *alsa_audio_init (void) |
1116 |
{ |
1117 |
return &conf;
|
1118 |
} |
1119 |
|
1120 |
static void alsa_audio_fini (void *opaque) |
1121 |
{ |
1122 |
(void) opaque;
|
1123 |
} |
1124 |
|
1125 |
static struct audio_option alsa_options[] = { |
1126 |
{ |
1127 |
.name = "DAC_SIZE_IN_USEC",
|
1128 |
.tag = AUD_OPT_BOOL, |
1129 |
.valp = &conf.size_in_usec_out, |
1130 |
.descr = "DAC period/buffer size in microseconds (otherwise in frames)"
|
1131 |
}, |
1132 |
{ |
1133 |
.name = "DAC_PERIOD_SIZE",
|
1134 |
.tag = AUD_OPT_INT, |
1135 |
.valp = &conf.period_size_out, |
1136 |
.descr = "DAC period size (0 to go with system default)",
|
1137 |
.overriddenp = &conf.period_size_out_overridden |
1138 |
}, |
1139 |
{ |
1140 |
.name = "DAC_BUFFER_SIZE",
|
1141 |
.tag = AUD_OPT_INT, |
1142 |
.valp = &conf.buffer_size_out, |
1143 |
.descr = "DAC buffer size (0 to go with system default)",
|
1144 |
.overriddenp = &conf.buffer_size_out_overridden |
1145 |
}, |
1146 |
{ |
1147 |
.name = "ADC_SIZE_IN_USEC",
|
1148 |
.tag = AUD_OPT_BOOL, |
1149 |
.valp = &conf.size_in_usec_in, |
1150 |
.descr = |
1151 |
"ADC period/buffer size in microseconds (otherwise in frames)"
|
1152 |
}, |
1153 |
{ |
1154 |
.name = "ADC_PERIOD_SIZE",
|
1155 |
.tag = AUD_OPT_INT, |
1156 |
.valp = &conf.period_size_in, |
1157 |
.descr = "ADC period size (0 to go with system default)",
|
1158 |
.overriddenp = &conf.period_size_in_overridden |
1159 |
}, |
1160 |
{ |
1161 |
.name = "ADC_BUFFER_SIZE",
|
1162 |
.tag = AUD_OPT_INT, |
1163 |
.valp = &conf.buffer_size_in, |
1164 |
.descr = "ADC buffer size (0 to go with system default)",
|
1165 |
.overriddenp = &conf.buffer_size_in_overridden |
1166 |
}, |
1167 |
{ |
1168 |
.name = "THRESHOLD",
|
1169 |
.tag = AUD_OPT_INT, |
1170 |
.valp = &conf.threshold, |
1171 |
.descr = "(undocumented)"
|
1172 |
}, |
1173 |
{ |
1174 |
.name = "DAC_DEV",
|
1175 |
.tag = AUD_OPT_STR, |
1176 |
.valp = &conf.pcm_name_out, |
1177 |
.descr = "DAC device name (for instance dmix)"
|
1178 |
}, |
1179 |
{ |
1180 |
.name = "ADC_DEV",
|
1181 |
.tag = AUD_OPT_STR, |
1182 |
.valp = &conf.pcm_name_in, |
1183 |
.descr = "ADC device name"
|
1184 |
}, |
1185 |
{ |
1186 |
.name = "VERBOSE",
|
1187 |
.tag = AUD_OPT_BOOL, |
1188 |
.valp = &conf.verbose, |
1189 |
.descr = "Behave in a more verbose way"
|
1190 |
}, |
1191 |
{ /* End of list */ }
|
1192 |
}; |
1193 |
|
1194 |
static struct audio_pcm_ops alsa_pcm_ops = { |
1195 |
.init_out = alsa_init_out, |
1196 |
.fini_out = alsa_fini_out, |
1197 |
.run_out = alsa_run_out, |
1198 |
.write = alsa_write, |
1199 |
.ctl_out = alsa_ctl_out, |
1200 |
|
1201 |
.init_in = alsa_init_in, |
1202 |
.fini_in = alsa_fini_in, |
1203 |
.run_in = alsa_run_in, |
1204 |
.read = alsa_read, |
1205 |
.ctl_in = alsa_ctl_in, |
1206 |
}; |
1207 |
|
1208 |
struct audio_driver alsa_audio_driver = {
|
1209 |
.name = "alsa",
|
1210 |
.descr = "ALSA http://www.alsa-project.org",
|
1211 |
.options = alsa_options, |
1212 |
.init = alsa_audio_init, |
1213 |
.fini = alsa_audio_fini, |
1214 |
.pcm_ops = &alsa_pcm_ops, |
1215 |
.can_be_default = 1,
|
1216 |
.max_voices_out = INT_MAX, |
1217 |
.max_voices_in = INT_MAX, |
1218 |
.voice_size_out = sizeof (ALSAVoiceOut),
|
1219 |
.voice_size_in = sizeof (ALSAVoiceIn)
|
1220 |
}; |