mirror of
https://github.com/owntone/owntone-server.git
synced 2024-12-29 08:33:23 -05:00
c8e793fd0c
introduces a dummy output for local audio Changes configure.ac to control the with-alsa and with-oss4 separately. This makes it possible to only use the dummy output and compile without alse+oss4.
428 lines
8.7 KiB
C
428 lines
8.7 KiB
C
/*
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* Copyright (C) 2010 Julien BLACHE <jb@jblache.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include "conffile.h"
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#include "logger.h"
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#include "player.h"
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#include "laudio.h"
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struct pcm_packet
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{
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uint8_t samples[STOB(AIRTUNES_V2_PACKET_SAMPLES)];
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uint64_t rtptime;
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size_t offset;
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struct pcm_packet *next;
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};
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static uint64_t pcm_pos;
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static uint64_t pcm_start_pos;
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static int pcm_buf_threshold;
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static int pcm_retry;
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static struct pcm_packet *pcm_pkt_head;
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static struct pcm_packet *pcm_pkt_tail;
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static char *card_name;
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static int oss_fd;
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static enum laudio_state pcm_status;
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static laudio_status_cb status_cb;
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static void
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update_status(enum laudio_state status)
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{
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pcm_status = status;
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status_cb(status);
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}
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static void
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laudio_oss4_write(uint8_t *buf, uint64_t rtptime)
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{
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struct pcm_packet *pkt;
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int scratch;
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int nsamp;
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int ret;
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pkt = (struct pcm_packet *)malloc(sizeof(struct pcm_packet));
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if (!pkt)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Out of memory for PCM pkt\n");
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update_status(LAUDIO_FAILED);
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return;
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}
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memcpy(pkt->samples, buf, sizeof(pkt->samples));
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pkt->rtptime = rtptime;
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pkt->offset = 0;
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pkt->next = NULL;
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if (pcm_pkt_tail)
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{
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pcm_pkt_tail->next = pkt;
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pcm_pkt_tail = pkt;
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}
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else
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{
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pcm_pkt_head = pkt;
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pcm_pkt_tail = pkt;
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}
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if (pcm_pos < pcm_pkt_head->rtptime)
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{
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pcm_pos += AIRTUNES_V2_PACKET_SAMPLES;
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return;
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}
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else if ((pcm_status != LAUDIO_RUNNING) && (pcm_pos >= pcm_start_pos))
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{
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/* Start audio output */
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scratch = PCM_ENABLE_OUTPUT;
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ret = ioctl(oss_fd, SNDCTL_DSP_SETTRIGGER, &scratch);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not enable output: %s\n", strerror(errno));
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update_status(LAUDIO_FAILED);
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return;
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}
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update_status(LAUDIO_RUNNING);
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}
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pkt = pcm_pkt_head;
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while (pkt)
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{
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nsamp = write(oss_fd, pkt->samples + pkt->offset, sizeof(pkt->samples) - pkt->offset);
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if (nsamp < 0)
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{
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if (errno == EAGAIN)
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{
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pcm_retry++;
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if (pcm_retry < 10)
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return;
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}
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DPRINTF(E_LOG, L_LAUDIO, "Write error: %s\n", strerror(errno));
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update_status(LAUDIO_FAILED);
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return;
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}
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pcm_retry = 0;
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pkt->offset += nsamp;
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nsamp = BTOS(nsamp);
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pcm_pos += nsamp;
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if (pkt->offset == sizeof(pkt->samples))
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{
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pcm_pkt_head = pkt->next;
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if (pkt == pcm_pkt_tail)
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pcm_pkt_tail = NULL;
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free(pkt);
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pkt = pcm_pkt_head;
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}
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/* Don't let the buffer fill up too much */
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if (nsamp == AIRTUNES_V2_PACKET_SAMPLES)
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break;
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}
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}
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static uint64_t
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laudio_oss4_get_pos(void)
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{
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int delay;
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int ret;
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ret = ioctl(oss_fd, SNDCTL_DSP_GETODELAY, &delay);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not obtain output delay: %s\n", strerror(errno));
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return pcm_pos;
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}
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return pcm_pos - BTOS(delay);
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}
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static void
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laudio_oss4_set_volume(int vol)
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{
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int oss_vol;
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int ret;
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vol = vol & 0xff;
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oss_vol = vol | (vol << 8);
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ret = ioctl(oss_fd, SNDCTL_DSP_SETPLAYVOL, &oss_vol);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not set volume: %s\n", strerror(errno));
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return;
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}
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DPRINTF(E_DBG, L_LAUDIO, "Setting PCM volume to %d (real: %d)\n", vol, (oss_vol & 0xff));
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}
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static int
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laudio_oss4_start(uint64_t cur_pos, uint64_t next_pkt)
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{
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int scratch;
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int ret;
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DPRINTF(E_DBG, L_LAUDIO, "PCM will start after %d samples (%d packets)\n", pcm_buf_threshold, pcm_buf_threshold / AIRTUNES_V2_PACKET_SAMPLES);
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/* Make pcm_pos the rtptime of the packet containing cur_pos */
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pcm_pos = next_pkt;
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while (pcm_pos > cur_pos)
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pcm_pos -= AIRTUNES_V2_PACKET_SAMPLES;
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pcm_start_pos = next_pkt + pcm_buf_threshold;
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/* FIXME check for OSS - Compensate threshold, as it's taken into account by snd_pcm_delay() */
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pcm_pos += pcm_buf_threshold;
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DPRINTF(E_DBG, L_LAUDIO, "PCM pos %" PRIu64 ", start pos %" PRIu64 "\n", pcm_pos, pcm_start_pos);
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pcm_pkt_head = NULL;
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pcm_pkt_tail = NULL;
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pcm_retry = 0;
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scratch = 0;
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ret = ioctl(oss_fd, SNDCTL_DSP_SETTRIGGER, &scratch);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not set trigger: %s\n", strerror(errno));
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return -1;
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}
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update_status(LAUDIO_STARTED);
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return 0;
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}
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static void
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laudio_oss4_stop(void)
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{
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struct pcm_packet *pkt;
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int ret;
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update_status(LAUDIO_STOPPING);
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ret = ioctl(oss_fd, SNDCTL_DSP_HALT_OUTPUT, NULL);
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if (ret < 0)
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DPRINTF(E_LOG, L_LAUDIO, "Failed to halt output: %s\n", strerror(errno));
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for (pkt = pcm_pkt_head; pcm_pkt_head; pkt = pcm_pkt_head)
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{
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pcm_pkt_head = pkt->next;
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free(pkt);
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}
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pcm_pkt_head = NULL;
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pcm_pkt_tail = NULL;
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update_status(LAUDIO_OPEN);
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}
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static int
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laudio_oss4_open(void)
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{
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audio_buf_info bi;
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oss_sysinfo si;
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int scratch;
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int ret;
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oss_fd = open(card_name, O_RDWR | O_NONBLOCK);
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if (oss_fd < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not open sound device: %s\n", strerror(errno));
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return -1;
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}
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ret = ioctl(oss_fd, SNDCTL_SYSINFO, &si);
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if ((ret < 0) || (si.versionnum < 0x040000))
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{
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DPRINTF(E_LOG, L_LAUDIO, "Your OSS version (%s) is unavailable or too old; version 4.0.0+ is required\n", si.version);
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goto out_fail;
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}
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scratch = 0;
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ret = ioctl(oss_fd, SNDCTL_DSP_SETTRIGGER, &scratch);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Could not set trigger: %s\n", strerror(errno));
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goto out_fail;
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}
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scratch = AFMT_S16_LE;
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errno = 0;
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ret = ioctl(oss_fd, SNDCTL_DSP_SETFMT, &scratch);
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if ((ret < 0) || (scratch != AFMT_S16_LE))
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{
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if (errno)
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DPRINTF(E_LOG, L_LAUDIO, "Could not set sample format (S16 LE): %s\n", strerror(errno));
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else
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DPRINTF(E_LOG, L_LAUDIO, "Sample format S16 LE not supported\n");
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goto out_fail;
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}
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scratch = 2;
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errno = 0;
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ret = ioctl(oss_fd, SNDCTL_DSP_CHANNELS, &scratch);
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if ((ret < 0) || (scratch != 2))
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{
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if (errno)
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DPRINTF(E_LOG, L_LAUDIO, "Could not set stereo: %s\n", strerror(errno));
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else
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DPRINTF(E_LOG, L_LAUDIO, "Stereo not supported\n");
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goto out_fail;
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}
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scratch = 44100;
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errno = 0;
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ret = ioctl(oss_fd, SNDCTL_DSP_SPEED, &scratch);
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if ((ret < 0) || (scratch != 44100))
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{
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if (errno)
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DPRINTF(E_LOG, L_LAUDIO, "Could not set speed (44100): %s\n", strerror(errno));
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else
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DPRINTF(E_LOG, L_LAUDIO, "Sample rate 44100 not supported\n");
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goto out_fail;
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}
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ret = ioctl(oss_fd, SNDCTL_DSP_GETOSPACE, &bi);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_LAUDIO, "Couldn't get output buffer status: %s\n", strerror(errno));
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goto out_fail;
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}
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pcm_buf_threshold = (BTOS(bi.bytes) / AIRTUNES_V2_PACKET_SAMPLES) * AIRTUNES_V2_PACKET_SAMPLES;
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update_status(LAUDIO_OPEN);
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return 0;
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out_fail:
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close(oss_fd);
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oss_fd = -1;
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return -1;
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}
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static void
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laudio_oss4_close(void)
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{
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struct pcm_packet *pkt;
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int ret;
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ret = ioctl(oss_fd, SNDCTL_DSP_HALT_OUTPUT, NULL);
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if (ret < 0)
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DPRINTF(E_LOG, L_LAUDIO, "Failed to halt output: %s\n", strerror(errno));
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close(oss_fd);
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oss_fd = -1;
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for (pkt = pcm_pkt_head; pcm_pkt_head; pkt = pcm_pkt_head)
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{
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pcm_pkt_head = pkt->next;
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free(pkt);
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}
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pcm_pkt_head = NULL;
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pcm_pkt_tail = NULL;
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update_status(LAUDIO_CLOSED);
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}
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static int
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laudio_oss4_init(laudio_status_cb cb, cfg_t *cfg_audio)
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{
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status_cb = cb;
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card_name = cfg_getstr(cfg_audio, "card");
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return 0;
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}
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static void
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laudio_oss4_deinit(void)
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{
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/* EMPTY */
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}
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audio_output audio_oss4 = {
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.name = "oss4",
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.init = &laudio_oss4_init,
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.deinit = &laudio_oss4_deinit,
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.start = &laudio_oss4_start,
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.stop = &laudio_oss4_stop,
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.open = &laudio_oss4_open,
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.close = &laudio_oss4_close,
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.pos = &laudio_oss4_get_pos,
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.write = &laudio_oss4_write,
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.volume = &laudio_oss4_set_volume,
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};
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