-/*
- * Copyright (C) 2009 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2009 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file oss_write.c Paraslash's oss output plugin. */
#include <regex.h>
#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <dirent.h>
#include <sys/soundcard.h>
+#include <lopsub.h>
+#include "write_cmd.lsg.h"
#include "para.h"
#include "fd.h"
#include "string.h"
#include "list.h"
#include "sched.h"
-#include "ggo.h"
+#include "buffer_tree.h"
#include "write.h"
-#include "oss_write.cmdline.h"
#include "error.h"
-/** Always use 16 bit little endian. */
-#define FORMAT AFMT_S16_LE
-
/** Data specific to the oss writer. */
struct private_oss_write_data {
/** The file handle of the device. */
int fd;
- /**
- * The samplerate given by command line option or the decoder
- * of the writer node group.
- */
- int samplerate;
- /**
- * The number of channels, given by command line option or the
- * decoder of the writer node group.
- */
- int channels;
/** Four bytes for stereo streams, two bytes for mono streams. */
int bytes_per_frame;
};
-static int oss_pre_select(struct sched *s, struct writer_node *wn)
+/*
+ * We keep one bit of static storage to make sure only one instance of the oss
+ * writer is running at any given time.
+ */
+static bool sound_device_busy;
+
+static bool sound_device_is_busy(void)
{
- struct private_oss_write_data *powd = wn->private_data;
- struct writer_node_group *wng = wn->wng;
+ return sound_device_busy;
+}
- if (!*wng->loaded)
- return 0;
- para_fd_set(powd->fd, &s->wfds, &s->max_fileno);
- return 1;
+static void set_sound_device_busy(void)
+{
+ assert(!sound_device_busy);
+ sound_device_busy = true;
}
-static int oss_post_select(__a_unused struct sched *s,
- struct writer_node *wn)
+
+static void set_sound_device_idle(void)
{
- int ret;
- struct private_oss_write_data *powd = wn->private_data;
- struct writer_node_group *wng = wn->wng;
- size_t frames, bytes = *wng->loaded - wn->written;
- char *data = *wng->bufp + wn->written;
+ assert(sound_device_busy);
+ sound_device_busy = false;
+}
- if (*wng->input_error < 0 && bytes < powd->bytes_per_frame) {
- wn->written = *wng->loaded;
- return *wng->input_error;
+static int get_oss_format(enum sample_format sf)
+{
+ switch (sf) {
+ case SF_S8: return AFMT_S8;
+ case SF_U8: return AFMT_U8;
+ case SF_S16_LE: return AFMT_S16_LE;
+ case SF_S16_BE: return AFMT_S16_BE;
+ case SF_U16_LE: return AFMT_U16_LE;
+ case SF_U16_BE: return AFMT_U16_BE;
+ default: return AFMT_S16_LE;
}
- frames = bytes / powd->bytes_per_frame;
- if (!frames) /* less than a single frame available */
- goto out;
- if (!FD_ISSET(powd->fd, &s->wfds))
- goto out;
- ret = write_nonblock(powd->fd, data, frames * powd->bytes_per_frame, 0);
- if (ret < 0)
- return ret;
- wn->written += ret;
-out:
- return 1;
+}
+
+static void oss_pre_select(struct sched *s, void *context)
+{
+ struct writer_node *wn = context;
+ struct private_oss_write_data *powd = wn->private_data;
+ int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
+
+ if (ret == 0 || (sound_device_is_busy() && !powd))
+ return;
+ if (ret < 0 || !powd)
+ return sched_min_delay(s);
+ para_fd_set(powd->fd, &s->wfds, &s->max_fileno);
}
static void oss_close(struct writer_node *wn)
{
struct private_oss_write_data *powd = wn->private_data;
+ if (!powd)
+ return;
close(powd->fd);
free(powd);
+ set_sound_device_idle();
}
/*
* incorrectly believe that the device is still in 44.1 kHz mode when actually
* the speed is decreased to 22.05 kHz.
*/
-static int oss_open(struct writer_node *wn)
+static int oss_init(struct writer_node *wn, unsigned sample_rate,
+ unsigned channels, int sample_format)
{
- int ret, format = FORMAT, channels, samplerate;
- struct oss_write_args_info *conf = wn->conf;
- struct writer_node_group *wng = wn->wng;
- struct private_oss_write_data *powd;
+ int ret, format;
+ unsigned ch, rate;
+ struct private_oss_write_data *powd = para_calloc(sizeof(*powd));
+ const char *dev = WRITE_CMD_OPT_STRING_VAL(OSS, DEVICE, wn->lpr);
- PARA_INFO_LOG("opening %s\n", conf->device_arg);
- ret = para_open(conf->device_arg, O_WRONLY, 0);
+ PARA_INFO_LOG("opening %s\n", dev);
+ ret = para_open(dev, O_WRONLY, 0);
if (ret < 0)
- return ret;
- powd = para_calloc(sizeof(*powd));
- wn->private_data = powd;
+ goto err_free;
powd->fd = ret;
ret = mark_fd_nonblocking(powd->fd);
if (ret < 0)
goto err;
/* set PCM format */
+ sample_format = format = get_oss_format(sample_format);
ret = ioctl(powd->fd, SNDCTL_DSP_SETFMT, &format);
if (ret < 0) {
ret = -ERRNO_TO_PARA_ERROR(errno);
goto err;
}
ret = -E_BAD_SAMPLE_FORMAT;
- if (format != FORMAT)
+ if (format != sample_format)
goto err;
/* set number of channels */
- if (!conf->channels_given && wng->channels)
- channels = *wng->channels;
- else
- channels = conf->channels_arg;
- ret = -E_BAD_CHANNEL_COUNT;
- if (channels == 0)
- goto err;
- powd->channels = channels;
- ret = ioctl(powd->fd, SNDCTL_DSP_CHANNELS, &channels);
+ ch = channels;
+ ret = ioctl(powd->fd, SNDCTL_DSP_CHANNELS, &ch);
if (ret < 0) {
ret = -ERRNO_TO_PARA_ERROR(errno);
goto err;
}
- if (powd->channels != channels)
+ ret = -E_BAD_CHANNEL_COUNT;
+ if (ch != channels)
goto err;
- powd->bytes_per_frame = channels * 2;
+ if (format == SF_U8 || format == SF_S8)
+ powd->bytes_per_frame = ch;
+ else
+ powd->bytes_per_frame = ch * 2;
/*
* Set sampling rate
*
* If we request a higher sampling rate than is supported by the
- * device, the the highest possible speed is automatically used. The
+ * device, the highest possible speed is automatically used. The
* value actually used is returned as the new value of the argument.
*/
- if (!conf->samplerate_given && wng->samplerate)
- samplerate = *wng->samplerate;
- else
- samplerate = conf->samplerate_arg;
- powd->samplerate = samplerate;
- ret = ioctl(powd->fd, SNDCTL_DSP_SPEED, &samplerate);
+ rate = sample_rate;
+ ret = ioctl(powd->fd, SNDCTL_DSP_SPEED, &rate);
if (ret < 0) {
ret = -ERRNO_TO_PARA_ERROR(errno);
goto err;
}
- if (samplerate != powd->samplerate) {
- int min = PARA_MIN(samplerate, powd->samplerate),
- max = PARA_MAX(samplerate, powd->samplerate);
+ if (rate != sample_rate) {
+ unsigned min = PARA_MIN(rate, sample_rate),
+ max = PARA_MAX(rate, sample_rate);
/*
* Check whether the returned sample rate differs significantly
* from the requested one.
ret = -E_BAD_SAMPLERATE;
if (100 * max > 110 * min) /* more than 10% deviation */
goto err;
- PARA_NOTICE_LOG("using %dHz rather than %dHz\n", samplerate,
- powd->samplerate);
+ PARA_NOTICE_LOG("using %uHz rather than %uHz\n", rate,
+ sample_rate);
}
-
+ wn->min_iqs = powd->bytes_per_frame;
+ wn->private_data = powd;
return 1;
err:
close(powd->fd);
+err_free:
free(powd);
+ PARA_ERROR_LOG("failed to init %s: %s\n", dev, para_strerror(-ret));
return ret;
}
-__malloc static void *oss_parse_config(const char *options)
+static int oss_post_select(__a_unused struct sched *s, void *context)
{
+ struct writer_node *wn = context;
+ struct private_oss_write_data *powd = wn->private_data;
+ struct btr_node *btrn = wn->btrn;
+ size_t frames, bytes;
int ret;
- struct oss_write_args_info *conf = para_calloc(sizeof(*conf));
-
- PARA_INFO_LOG("options: %s, %zd\n", options, strcspn(options, " \t"));
- ret = oss_cmdline_parser_string(options, conf, "oss_write");
- if (ret)
- goto err_out;
- return conf;
-err_out:
- free(conf);
- return NULL;
-}
+ char *data;
+ audio_buf_info abi;
-/**
- * The init function of the oss writer.
- *
- * \param w Pointer to the writer to initialize.
- *
- * \sa struct writer.
- */
-void oss_write_init(struct writer *w)
-{
- struct oss_write_args_info dummy;
-
- oss_cmdline_parser_init(&dummy);
- w->open = oss_open;
- w->close = oss_close;
- w->pre_select = oss_pre_select;
- w->post_select = oss_post_select;
- w->parse_config = oss_parse_config;
- w->shutdown = NULL;
- w->help = (struct ggo_help) {
- .short_help = oss_write_args_info_help,
- .detailed_help = oss_write_args_info_detailed_help
- };
- oss_cmdline_parser_free(&dummy);
+ ret = task_get_notification(wn->task);
+ if (ret < 0)
+ goto out;
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret <= 0)
+ goto out;
+ if (!powd) {
+ int32_t rate, ch, format;
+
+ if (sound_device_is_busy())
+ return 0;
+ get_btr_sample_rate(btrn, &rate);
+ get_btr_channels(btrn, &ch);
+ get_btr_sample_format(btrn, &format);
+ ret = oss_init(wn, rate, ch, format);
+ if (ret < 0)
+ goto out;
+ set_sound_device_busy();
+ return 0;
+ }
+ btr_merge(btrn, wn->min_iqs);
+ bytes = btr_next_buffer(btrn, &data);
+ frames = bytes / powd->bytes_per_frame;
+ if (!frames) { /* eof and less than a single frame available */
+ ret = -E_WRITE_COMMON_EOF;
+ goto out;
+ }
+ ret = 0;
+ if (!FD_ISSET(powd->fd, &s->wfds))
+ goto out;
+ /* get maximal number of bytes that can be written */
+ ret = ioctl(powd->fd, SNDCTL_DSP_GETOSPACE, &abi);
+ if (ret >= 0) {
+ size_t max_frames = abi.bytes / powd->bytes_per_frame;
+ if (max_frames == 0)
+ goto out;
+ /* cap number of frames to avoid sound artefacts */
+ frames = PARA_MIN(frames, max_frames);
+ }
+ ret = xwrite(powd->fd, data, frames * powd->bytes_per_frame);
+ if (ret < 0)
+ goto out;
+ btr_consume(btrn, ret);
+ ret = 0;
+out:
+ if (ret < 0)
+ btr_remove_node(&wn->btrn);
+ return ret;
}
+
+const struct writer lsg_write_cmd_com_oss_user_data = {
+ .pre_select = oss_pre_select,
+ .post_select = oss_post_select,
+ .close = oss_close,
+};
projects / paraslash.git / blobdiff