-/*
- * Copyright (C) 2001 CodeFactory AB
- * Copyright (C) 2001 Thomas Nyberg <thomas@codefactory.se>
- * Copyright (C) 2001-2002 Andy Wingo <apwingo@eos.ncsu.edu>
- * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
+/* GStreamer
+ * Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
+ *
+ * gstalsasink.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <asoundlib.h>
+
#include "gstalsasink.h"
-#include "gstalsaclock.h"
/* elementfactory information */
-static GstElementDetails gst_alsa_sink_details =
-GST_ELEMENT_DETAILS ("Alsa Sink",
+static GstElementDetails gst_alsasink_details =
+GST_ELEMENT_DETAILS ("Audio Sink (ALSA)",
"Sink/Audio",
"Output to a sound card via ALSA",
- "Thomas Nyberg <thomas@codefactory.se>, "
- "Andy Wingo <apwingo@eos.ncsu.edu>, "
- "Benjamin Otte <in7y118@public.uni-hamburg.de>");
-
-static GstPadTemplate *gst_alsa_sink_pad_factory (void);
-static GstPadTemplate *gst_alsa_sink_request_pad_factory (void);
-static void gst_alsa_sink_base_init (gpointer g_class);
-static void gst_alsa_sink_class_init (gpointer g_klass, gpointer class_data);
-static void gst_alsa_sink_init (GstAlsaSink * this);
-static inline void gst_alsa_sink_flush_one_pad (GstAlsaSink * sink, gint i);
-static void gst_alsa_sink_flush_pads (GstAlsaSink * sink);
-static int gst_alsa_sink_mmap (GstAlsa * this, snd_pcm_sframes_t * avail);
-static int gst_alsa_sink_write (GstAlsa * this, snd_pcm_sframes_t * avail);
-static void gst_alsa_sink_loop (GstElement * element);
-static gboolean gst_alsa_sink_check_event (GstAlsaSink * sink, gint pad_nr);
-static GstElementStateReturn gst_alsa_sink_change_state (GstElement * element);
-
-static GstClockTime gst_alsa_sink_get_time (GstAlsa * this);
-
-static GstAlsa *sink_parent_class = NULL;
-
-static GstPadTemplate *
-gst_alsa_sink_pad_factory (void)
-{
- static GstPadTemplate *template = NULL;
+ "Wim Taymans <wim@fluendo.com>");
- if (!template)
- template = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
- gst_alsa_caps (SND_PCM_FORMAT_UNKNOWN, -1, -1));
+static void gst_alsasink_base_init (gpointer g_class);
+static void gst_alsasink_class_init (GstAlsaSinkClass * klass);
+static void gst_alsasink_init (GstAlsaSink * alsasink);
+static void gst_alsasink_dispose (GObject * object);
- return template;
-}
-static GstPadTemplate *
-gst_alsa_sink_request_pad_factory (void)
-{
- static GstPadTemplate *template = NULL;
+static GstCaps *gst_alsasink_getcaps (GstBaseSink * bsink);
- if (!template)
- template =
- gst_pad_template_new ("sink%d", GST_PAD_SINK, GST_PAD_REQUEST,
- gst_alsa_caps (SND_PCM_FORMAT_UNKNOWN, -1, 1));
+static gboolean gst_alsasink_open (GstAudioSink * asink,
+ GstRingBufferSpec * spec);
+static gboolean gst_alsasink_close (GstAudioSink * asink);
+static guint gst_alsasink_write (GstAudioSink * asink, gpointer data,
+ guint length);
+static guint gst_alsasink_delay (GstAudioSink * asink);
+static void gst_alsasink_reset (GstAudioSink * asink);
- return template;
-}
+/* AlsaSink signals and args */
+enum
+{
+ LAST_SIGNAL
+};
+
+static GstStaticPadTemplate alsasink_sink_factory =
+ GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ //"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
+ //"signed = (boolean) { TRUE, FALSE }, "
+ "endianness = (int) LITTLE_ENDIAN, "
+ "signed = (boolean) TRUE, "
+ "width = (int) 16, "
+ "depth = (int) 16, "
+ "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; "
+ "audio/x-raw-int, "
+ "signed = (boolean) { TRUE, FALSE }, "
+ "width = (int) 8, "
+ "depth = (int) 8, "
+ "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
+ );
+
+static GstElementClass *parent_class = NULL;
+
+/* static guint gst_alsasink_signals[LAST_SIGNAL] = { 0 }; */
GType
-gst_alsa_sink_get_type (void)
+gst_alsasink_get_type (void)
{
- static GType alsa_sink_type = 0;
+ static GType alsasink_type = 0;
- if (!alsa_sink_type) {
- static const GTypeInfo alsa_sink_info = {
+ if (!alsasink_type) {
+ static const GTypeInfo alsasink_info = {
sizeof (GstAlsaSinkClass),
- gst_alsa_sink_base_init,
+ gst_alsasink_base_init,
NULL,
- gst_alsa_sink_class_init,
+ (GClassInitFunc) gst_alsasink_class_init,
NULL,
NULL,
sizeof (GstAlsaSink),
0,
- (GInstanceInitFunc) gst_alsa_sink_init,
+ (GInstanceInitFunc) gst_alsasink_init,
};
- alsa_sink_type =
- g_type_register_static (GST_TYPE_ALSA_MIXER, "GstAlsaSink",
- &alsa_sink_info, 0);
+ alsasink_type =
+ g_type_register_static (GST_TYPE_AUDIOSINK, "GstAlsaSink",
+ &alsasink_info, 0);
}
- return alsa_sink_type;
+
+ return alsasink_type;
+}
+
+static void
+gst_alsasink_dispose (GObject * object)
+{
+ G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
-gst_alsa_sink_base_init (gpointer g_class)
+gst_alsasink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
- gst_element_class_add_pad_template (element_class,
- gst_alsa_sink_pad_factory ());
- gst_element_class_add_pad_template (element_class,
- gst_alsa_sink_request_pad_factory ());
+ gst_element_class_set_details (element_class, &gst_alsasink_details);
- gst_element_class_set_details (element_class, &gst_alsa_sink_details);
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&alsasink_sink_factory));
}
-
static void
-gst_alsa_sink_class_init (gpointer g_class, gpointer class_data)
+gst_alsasink_class_init (GstAlsaSinkClass * klass)
{
- GObjectClass *object_class;
- GstElementClass *element_class;
- GstAlsaClass *alsa_class;
- GstAlsaSinkClass *klass;
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseSinkClass *gstbasesink_class;
+ GstBaseAudioSinkClass *gstbaseaudiosink_class;
+ GstAudioSinkClass *gstaudiosink_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+ gstbasesink_class = (GstBaseSinkClass *) klass;
+ gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
+ gstaudiosink_class = (GstAudioSinkClass *) klass;
- klass = (GstAlsaSinkClass *) g_class;
- object_class = (GObjectClass *) klass;
- element_class = (GstElementClass *) klass;
- alsa_class = (GstAlsaClass *) klass;
+ parent_class = g_type_class_ref (GST_TYPE_BASEAUDIOSINK);
- if (sink_parent_class == NULL)
- sink_parent_class = g_type_class_ref (GST_TYPE_ALSA_MIXER);
+ gobject_class->dispose = gst_alsasink_dispose;
- alsa_class->stream = SND_PCM_STREAM_PLAYBACK;
- alsa_class->transmit_mmap = gst_alsa_sink_mmap;
- alsa_class->transmit_rw = gst_alsa_sink_write;
+ gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_alsasink_getcaps);
- element_class->change_state = gst_alsa_sink_change_state;
+ gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_alsasink_open);
+ gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_alsasink_close);
+ gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_alsasink_write);
+ gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_alsasink_delay);
+ gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_alsasink_reset);
}
+
static void
-gst_alsa_sink_init (GstAlsaSink * sink)
+gst_alsasink_init (GstAlsaSink * alsasink)
{
- GstAlsa *this = GST_ALSA (sink);
-
- this->pad[0] =
- gst_pad_new_from_template (gst_alsa_sink_pad_factory (), "sink");
- gst_pad_set_link_function (this->pad[0], gst_alsa_link);
- gst_pad_set_getcaps_function (this->pad[0], gst_alsa_get_caps);
- gst_pad_set_fixate_function (this->pad[0], gst_alsa_fixate);
- gst_element_add_pad (GST_ELEMENT (this), this->pad[0]);
-
- this->clock =
- gst_alsa_clock_new ("alsasinkclock", gst_alsa_sink_get_time, this);
- /* we hold a ref to our clock until we're disposed */
- gst_object_ref (GST_OBJECT (this->clock));
- gst_object_sink (GST_OBJECT (this->clock));
-
- gst_element_set_loop_function (GST_ELEMENT (this), gst_alsa_sink_loop);
+ GST_DEBUG ("initializing alsasink");
+
+ alsasink->device = g_strdup ("default");
}
-static inline void
-gst_alsa_sink_flush_one_pad (GstAlsaSink * sink, gint i)
+static GstCaps *
+gst_alsasink_getcaps (GstBaseSink * bsink)
{
- GST_DEBUG_OBJECT (sink, "flushing pad %d", i);
- switch (sink->behaviour[i]) {
- case 0:
- if (sink->gst_data[i]) {
- GST_DEBUG_OBJECT (sink, "unreffing gst data %p", sink->gst_data[i]);
- gst_data_unref (GST_DATA (sink->gst_data[i]));
- }
- sink->gst_data[i] = NULL;
- sink->buf_data[i] = NULL;
- sink->behaviour[i] = 0;
- sink->size[i] = 0;
- break;
- case 1:
- g_free (sink->buf_data[i]);
- sink->buf_data[i] = NULL;
- sink->behaviour[i] = 0;
- sink->size[i] = 0;
- break;
- default:
- g_assert_not_reached ();
- }
+ return NULL;
}
-static void
-gst_alsa_sink_flush_pads (GstAlsaSink * sink)
+
+#define CHECK(call, error) \
+G_STMT_START { \
+if ((err = call) < 0) \
+ goto error; \
+} G_STMT_END;
+
+static int
+set_hwparams (GstAlsaSink * alsa)
{
- gint i;
+ guint rrate;
+ gint err, dir;
+ snd_pcm_hw_params_t *params;
+
+ snd_pcm_hw_params_alloca (¶ms);
+
+ /* choose all parameters */
+ CHECK (snd_pcm_hw_params_any (alsa->handle, params), no_config);
+ /* set the interleaved read/write format */
+ CHECK (snd_pcm_hw_params_set_access (alsa->handle, params, alsa->access),
+ wrong_access);
+ /* set the sample format */
+ CHECK (snd_pcm_hw_params_set_format (alsa->handle, params, alsa->format),
+ no_sample_format);
+ /* set the count of channels */
+ CHECK (snd_pcm_hw_params_set_channels (alsa->handle, params, alsa->channels),
+ no_channels);
+ /* set the stream rate */
+ rrate = alsa->rate;
+ CHECK (snd_pcm_hw_params_set_rate_near (alsa->handle, params, &rrate, 0),
+ no_rate);
+ if (rrate != alsa->rate)
+ goto rate_match;
+
+ if (alsa->buffer_time != -1) {
+ /* set the buffer time */
+ CHECK (snd_pcm_hw_params_set_buffer_time_near (alsa->handle, params,
+ &alsa->buffer_time, &dir), buffer_time);
+ }
+ CHECK (snd_pcm_hw_params_get_buffer_size (params, &alsa->buffer_size),
+ buffer_size);
+
+ if (alsa->period_time != -1) {
+ /* set the period time */
+ CHECK (snd_pcm_hw_params_set_period_time_near (alsa->handle, params,
+ &alsa->period_time, &dir), period_time);
+ }
+ CHECK (snd_pcm_hw_params_get_period_size (params, &alsa->period_size, &dir),
+ period_size);
- for (i = 0; i < GST_ELEMENT (sink)->numpads; i++) {
- /* flush twice to unref buffer when behaviour == 1 */
- gst_alsa_sink_flush_one_pad (sink, i);
- gst_alsa_sink_flush_one_pad (sink, i);
+ /* write the parameters to device */
+ CHECK (snd_pcm_hw_params (alsa->handle, params), set_hw_params);
+
+ return 0;
+
+ /* ERRORS */
+no_config:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Broken configuration for playback: no configurations available: %s",
+ snd_strerror (err)), (NULL));
+ return err;
+ }
+wrong_access:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Access type not available for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+no_sample_format:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Sample format not available for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+no_channels:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Channels count (%i) not available for playbacks: %s",
+ alsa->channels, snd_strerror (err)), (NULL));
+ return err;
+ }
+no_rate:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Rate %iHz not available for playback: %s",
+ alsa->rate, snd_strerror (err)), (NULL));
+ return err;
+ }
+rate_match:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Rate doesn't match (requested %iHz, get %iHz)",
+ alsa->rate, err), (NULL));
+ return -EINVAL;
+ }
+buffer_time:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set buffer time %i for playback: %s",
+ alsa->buffer_time, snd_strerror (err)), (NULL));
+ return err;
+ }
+buffer_size:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to get buffer size for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+period_time:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set period time %i for playback: %s", alsa->period_time,
+ snd_strerror (err)), (NULL));
+ return err;
+ }
+period_size:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to get period size for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+set_hw_params:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set hw params for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+}
+
+static int
+set_swparams (GstAlsaSink * alsa)
+{
+ int err;
+ snd_pcm_sw_params_t *params;
+
+ snd_pcm_sw_params_alloca (¶ms);
+
+ /* get the current swparams */
+ CHECK (snd_pcm_sw_params_current (alsa->handle, params), no_config);
+ /* start the transfer when the buffer is almost full: */
+ /* (buffer_size / avail_min) * avail_min */
+ CHECK (snd_pcm_sw_params_set_start_threshold (alsa->handle, params,
+ (alsa->buffer_size / alsa->period_size) * alsa->period_size),
+ start_threshold);
+
+ /* allow the transfer when at least period_size samples can be processed */
+ CHECK (snd_pcm_sw_params_set_avail_min (alsa->handle, params,
+ alsa->period_size), set_avail);
+ /* align all transfers to 1 sample */
+ CHECK (snd_pcm_sw_params_set_xfer_align (alsa->handle, params, 1), set_align);
+
+ /* write the parameters to the playback device */
+ CHECK (snd_pcm_sw_params (alsa->handle, params), set_sw_params);
+
+ return 0;
+
+ /* ERRORS */
+no_config:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to determine current swparams for playback: %s",
+ snd_strerror (err)), (NULL));
+ return err;
+ }
+start_threshold:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set start threshold mode for playback: %s",
+ snd_strerror (err)), (NULL));
+ return err;
+ }
+set_avail:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set avail min for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+set_align:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set transfer align for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
+ }
+set_sw_params:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Unable to set sw params for playback: %s", snd_strerror (err)),
+ (NULL));
+ return err;
}
}
-/* TRUE, if everything should continue */
static gboolean
-gst_alsa_sink_check_event (GstAlsaSink * sink, gint pad_nr)
+alsasink_parse_spec (GstAlsaSink * alsa, GstRingBufferSpec * spec)
{
- gboolean cont = TRUE;
- GstEvent *event;
- GstAlsa *this = GST_ALSA (sink);
-
- /* we get the event from our internal buffer and clear the internal one */
- event = GST_EVENT (sink->gst_data[pad_nr]);
- sink->gst_data[pad_nr] = 0;
- GST_LOG_OBJECT (sink, "checking event %p of type %d on sink pad %d",
- event, GST_EVENT_TYPE (event), pad_nr);
- if (event) {
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_EOS:
- gst_alsa_set_eos (this);
- cont = FALSE;
- break;
- case GST_EVENT_INTERRUPT:
- cont = FALSE;
- break;
- case GST_EVENT_DISCONTINUOUS:
- {
- GstClockTime value = GST_CLOCK_TIME_NONE, delay;
-
- /* only the first pad may seek */
- if (pad_nr != 0) {
+ switch (spec->type) {
+ case GST_BUFTYPE_LINEAR:
+ alsa->format = snd_pcm_build_linear_format (spec->depth, spec->width,
+ spec->sign ? 0 : 1, spec->bigend ? 1 : 0);
+ break;
+ case GST_BUFTYPE_FLOAT:
+ switch (spec->format) {
+ case GST_FLOAT32_LE:
+ alsa->format = SND_PCM_FORMAT_FLOAT_LE;
break;
- }
- delay = (this->format == NULL) ? 0 :
- GST_SECOND * this->played / this->format->rate -
- gst_alsa_sink_get_time (this);
- if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &value)) {
- gst_element_set_time_delay (GST_ELEMENT (this), value,
- MIN (value, delay));
- } else if (this->format && (gst_event_discont_get_value (event,
- GST_FORMAT_DEFAULT, &value))) {
- value = gst_alsa_samples_to_timestamp (this, value);
- gst_element_set_time_delay (GST_ELEMENT (this), value, MIN (value,
- delay));
- } else if (this->format
- && (gst_event_discont_get_value (event, GST_FORMAT_BYTES,
- &value))) {
- value = gst_alsa_bytes_to_timestamp (this, value);
- gst_element_set_time_delay (GST_ELEMENT (this), value, MIN (value,
- delay));
- } else {
- GST_WARNING_OBJECT (this,
- "couldn't extract time from discont event. Bad things might happen!");
- }
-
- if (GST_CLOCK_TIME_IS_VALID (value)) {
- GST_DEBUG ("Set discont to %" GST_TIME_FORMAT, GST_TIME_ARGS (value));
- }
-
- break;
- }
- case GST_EVENT_FILLER:{
- guint64 dur = gst_event_filler_get_duration (event);
-
- if (GST_CLOCK_TIME_IS_VALID (dur)) {
- gint samples;
- GstBuffer *buf;
-
- buf = gst_buffer_new ();
- GST_BUFFER_TIMESTAMP (buf) = GST_EVENT_TIMESTAMP (event);
- GST_BUFFER_DURATION (buf) = dur;
-
- samples = gst_alsa_timestamp_to_samples (this,
- GST_BUFFER_DURATION (buf));
- if (GST_ELEMENT (this)->numsinkpads == 1)
- samples *= this->format->channels;
- GST_BUFFER_SIZE (buf) = samples *
- snd_pcm_format_physical_width (this->format->format) / 8;
- GST_BUFFER_DATA (buf) = g_malloc (GST_BUFFER_SIZE (buf));
- if (0 != snd_pcm_format_set_silence (this->format->format,
- GST_BUFFER_DATA (buf), samples)) {
- GST_WARNING_OBJECT (this, "error silencing buffer, may hang");
- gst_buffer_unref (buf);
- } else {
- GST_DEBUG_OBJECT (this, "adding %" GST_TIME_FORMAT " silence at %"
- GST_TIME_FORMAT, GST_TIME_ARGS (dur),
- GST_TIME_ARGS (GST_EVENT_TIMESTAMP (event)));
- sink->gst_data[pad_nr] = GST_DATA (buf);
- }
- }
- break;
+ case GST_FLOAT32_BE:
+ alsa->format = SND_PCM_FORMAT_FLOAT_BE;
+ break;
+ case GST_FLOAT64_LE:
+ alsa->format = SND_PCM_FORMAT_FLOAT64_LE;
+ break;
+ case GST_FLOAT64_BE:
+ alsa->format = SND_PCM_FORMAT_FLOAT64_BE;
+ break;
+ default:
+ goto error;
}
- case GST_EVENT_TAG:
- break;
- default:
- GST_INFO_OBJECT (this, "got an unknown event (Type: %d)",
- GST_EVENT_TYPE (event));
- break;
- }
- GST_LOG_OBJECT (sink, "unreffing event %p of type %d with refcount %d",
- event, GST_EVENT_TYPE (event), GST_DATA_REFCOUNT (event));
- gst_event_unref (event);
- } else {
- /* the element at the top of the chain did not emit an event. */
- g_assert_not_reached ();
+ break;
+ case GST_BUFTYPE_A_LAW:
+ alsa->format = SND_PCM_FORMAT_A_LAW;
+ break;
+ case GST_BUFTYPE_MU_LAW:
+ alsa->format = SND_PCM_FORMAT_MU_LAW;
+ break;
+ default:
+ goto error;
+
+ }
+ alsa->rate = spec->rate;
+ alsa->channels = spec->channels;
+ alsa->buffer_time = spec->buffer_time;
+ alsa->period_time = spec->latency_time;
+ alsa->access = SND_PCM_ACCESS_RW_INTERLEAVED;
+
+ return TRUE;
+
+ /* ERRORS */
+error:
+ {
+ return FALSE;
}
- return cont;
}
-static int
-gst_alsa_sink_mmap (GstAlsa * this, snd_pcm_sframes_t * avail)
+
+static gboolean
+gst_alsasink_open (GstAudioSink * asink, GstRingBufferSpec * spec)
{
- snd_pcm_uframes_t offset;
- const snd_pcm_channel_area_t *dst;
- snd_pcm_channel_area_t *src;
- GstAlsaSink *sink = GST_ALSA_SINK (this);
- int i;
- int err = -1;
- int width = snd_pcm_format_physical_width (this->format->format);
-
- /* areas points to the memory areas that belong to gstreamer. */
- src = g_malloc0 (this->format->channels * sizeof (snd_pcm_channel_area_t));
-
- if (((GstElement *) this)->numpads == 1) {
- /* interleaved */
- for (i = 0; i < this->format->channels; i++) {
- src[i].addr = sink->buf_data[0];
- src[i].first = i * width;
- src[i].step = this->format->channels * width;
- }
- } else {
- /* noninterleaved */
- for (i = 0; i < this->format->channels; i++) {
- src[i].addr = sink->buf_data[i];
- src[i].first = 0;
- src[i].step = width;
- }
- }
+ GstAlsaSink *alsa;
+ gint err;
- if ((err = snd_pcm_mmap_begin (this->handle, &dst, &offset, avail)) < 0) {
- GST_ERROR_OBJECT (this, "mmap failed: %s", snd_strerror (err));
- goto out;
- }
+ alsa = GST_ALSA_SINK (asink);
- if ((err =
- snd_pcm_areas_copy (dst, offset, src, 0, this->format->channels,
- *avail, this->format->format)) < 0) {
- snd_pcm_mmap_commit (this->handle, offset, 0);
- GST_ERROR_OBJECT (this, "data copy failed: %s", snd_strerror (err));
- goto out;
+ if (!alsasink_parse_spec (alsa, spec))
+ goto spec_parse;
+
+ CHECK (snd_pcm_open (&alsa->handle, alsa->device, SND_PCM_STREAM_PLAYBACK, 0),
+ open_error);
+
+ CHECK (set_hwparams (alsa), hw_params_failed);
+ CHECK (set_swparams (alsa), sw_params_failed);
+
+ spec->bytes_per_sample = 4;
+ alsa->bytes_per_sample = 4;
+ spec->segsize = alsa->period_size * 4;
+ spec->segtotal = alsa->buffer_size / alsa->period_size;
+ spec->silence_sample[0] = 0;
+ spec->silence_sample[1] = 0;
+ spec->silence_sample[2] = 0;
+ spec->silence_sample[3] = 0;
+
+ return TRUE;
+
+ /* ERRORS */
+spec_parse:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Error parsing spec"), (NULL));
+ return FALSE;
}
- if ((err = snd_pcm_mmap_commit (this->handle, offset, *avail)) < 0) {
- if (err == -EPIPE) {
- gst_alsa_xrun_recovery (GST_ALSA (this));
- } else {
- GST_ERROR_OBJECT (this, "mmap commit failed: %s", snd_strerror (err));
- }
- goto out;
+open_error:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Playback open error: %s", snd_strerror (err)), (NULL));
+ return FALSE;
+ }
+hw_params_failed:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Setting of hwparams failed: %s", snd_strerror (err)), (NULL));
+ return FALSE;
+ }
+sw_params_failed:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("Setting of swparams failed: %s", snd_strerror (err)), (NULL));
+ return FALSE;
}
+}
-out:
- g_free (src);
- return err;
+static gboolean
+gst_alsasink_close (GstAudioSink * asink)
+{
+ GstAlsaSink *alsa;
+
+ alsa = GST_ALSA_SINK (asink);
+
+ snd_pcm_close (alsa->handle);
+
+ return TRUE;
}
-static int
-gst_alsa_sink_write (GstAlsa * this, snd_pcm_sframes_t * avail)
+
+
+/*
+ * Underrun and suspend recovery
+ */
+static gint
+xrun_recovery (snd_pcm_t * handle, gint err)
{
- GstAlsaSink *sink = GST_ALSA_SINK (this);
- void *channels[this->format->channels];
- int err, i;
-
- if (((GstElement *) this)->numpads == 1) {
- /* interleaved */
- err = snd_pcm_writei (this->handle, sink->buf_data[0], *avail);
- } else {
- /* noninterleaved */
- for (i = 0; i < this->format->channels; i++) {
- channels[i] = sink->buf_data[i];
- }
- err = snd_pcm_writen (this->handle, channels, *avail);
- }
- /* error handling */
- if (err < 0) {
- if (err == -EPIPE) {
- gst_alsa_xrun_recovery (this);
- return 0;
+ GST_DEBUG ("xrun recovery %d", err);
+
+ if (err == -EPIPE) { /* under-run */
+ err = snd_pcm_prepare (handle);
+ if (err < 0)
+ GST_WARNING ("Can't recovery from underrun, prepare failed: %s",
+ snd_strerror (err));
+ return 0;
+ } else if (err == -ESTRPIPE) {
+ while ((err = snd_pcm_resume (handle)) == -EAGAIN)
+ g_usleep (100); /* wait until the suspend flag is released */
+
+ if (err < 0) {
+ err = snd_pcm_prepare (handle);
+ if (err < 0)
+ GST_WARNING ("Can't recovery from suspend, prepare failed: %s",
+ snd_strerror (err));
}
- GST_ERROR_OBJECT (this, "error on data access: %s", snd_strerror (err));
+ return 0;
}
return err;
}
-static void
-gst_alsa_sink_loop (GstElement * element)
-{
- snd_pcm_sframes_t avail, avail2, copied, sample_diff, max_discont;
- snd_pcm_uframes_t samplestamp, expected;
- gint i;
- guint bytes; /* per channel */
- GstAlsa *this = GST_ALSA (element);
- GstAlsaSink *sink = GST_ALSA_SINK (element);
-
- g_return_if_fail (sink != NULL);
-sink_restart:
+static guint
+gst_alsasink_write (GstAudioSink * asink, gpointer data, guint length)
+{
+ GstAlsaSink *alsa;
+ gint err;
+ gint cptr;
+ gint16 *ptr;
- avail = gst_alsa_update_avail (this);
- if (avail == -EPIPE)
- goto sink_restart;
- if (avail < 0)
- return;
+ alsa = GST_ALSA_SINK (asink);
- if (avail > 0 || (avail == 0 && !this->format)) {
-
- bytes = G_MAXINT;
-
- for (i = 0; i < element->numpads; i++) {
- GstBuffer *buf;
-
- g_assert (this->pad[i] != NULL);
- while (sink->size[i] == 0) {
- if (!sink->gst_data[i]) {
- sink->gst_data[i] = gst_pad_pull (this->pad[i]);
- GST_LOG_OBJECT (sink, "pulled data %p from pad %d",
- sink->gst_data[i], i);
- }
-
- if (GST_IS_EVENT (sink->gst_data[i])) {
- GST_LOG_OBJECT (sink, "pulled data %p is an event, checking",
- sink->gst_data[i]);
-
- if (gst_alsa_sink_check_event (sink, i))
- continue;
- return;
- }
- /* it's a buffer */
- g_return_if_fail (GST_IS_BUFFER (sink->gst_data[i]));
- buf = GST_BUFFER (sink->gst_data[i]);
- /* check if caps nego failed somewhere */
- if (this->format == NULL) {
- GST_ELEMENT_ERROR (this, CORE, NEGOTIATION, (NULL),
- ("ALSA format not negotiated"));
- }
- samplestamp = gst_alsa_timestamp_to_samples (this,
- GST_BUFFER_TIMESTAMP (buf));
- max_discont = gst_alsa_timestamp_to_samples (this, this->max_discont);
- /* optimization: check if we're using our own clock
- * This optimization is important because if we're using our own clock
- * gst_element_get_time calls snd_pcm_delay and the following code
- * assumes that both calls return the same value. However they can be
- * wildly different, since snd_pcm_delay goes deep into the kernel.
- */
- if (this->ext_clock == GST_CLOCK (this->clock)) {
- /* FIXME: this is ugly because of the variables it uses but I
- * don't know a better way to get this info */
- if (element->base_time > this->clock->start_time) {
- expected =
- this->played - gst_alsa_timestamp_to_samples (this,
- element->base_time - this->clock->start_time);
- } else {
- expected =
- this->played + gst_alsa_timestamp_to_samples (this,
- this->clock->start_time - element->base_time);
- }
- } else {
- if (snd_pcm_delay (this->handle, &sample_diff) != 0) {
- sample_diff = 0;
- }
- expected =
- gst_alsa_timestamp_to_samples (this,
- gst_element_get_time (GST_ELEMENT (this))) + sample_diff;
- /* actual diff = buffer samplestamp - played - to_play */
- }
- sample_diff = samplestamp - expected;
-
- if ((!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) ||
- (-max_discont <= sample_diff && sample_diff <= max_discont)) {
-
- /* difference between expected and current is < GST_ALSA_DEVIATION */
- no_difference:
- sink->size[i] = GST_BUFFER_SIZE (buf);
- sink->buf_data[i] = GST_BUFFER_DATA (buf);
- sink->behaviour[i] = 0;
- } else if (sample_diff > 0) {
- /* there are empty samples in front of us, fill them with silence */
- int samples = MIN (bytes, sample_diff) *
- (element->numpads == 1 ? this->format->channels : 1);
- int width = snd_pcm_format_physical_width (this->format->format);
- int size = samples * width / 8;
-
- if (size / (width / 8) != samples || samples > max_discont) {
- GST_WARNING_OBJECT (this,
- "Integer overflow for size=%d/samples=%d (sample_diff=%ld) - broken stream",
- size, samples, sample_diff);
- goto no_difference;
- }
- GST_INFO_OBJECT (this,
- "Allocating %d bytes (%ld samples) now to resync: sample %lu expected, but got %ld",
- size, MIN (bytes, sample_diff), expected, samplestamp);
- sink->buf_data[i] = g_try_malloc (size);
- if (!sink->buf_data[i]) {
- GST_WARNING_OBJECT (this,
- "error allocating %d bytes, buffers unsynced now.", size);
- goto no_difference;
- }
- sink->size[i] = size;
- if (0 != snd_pcm_format_set_silence (this->format->format,
- sink->buf_data[i], samples)) {
- GST_WARNING_OBJECT (this,
- "error silencing buffer, enjoy the noise.");
- }
- sink->behaviour[i] = 1;
- } else if (gst_alsa_samples_to_bytes (this, -sample_diff) >=
- GST_BUFFER_SIZE (buf)) {
- GST_INFO_OBJECT (this,
- "Skipping %lu samples to resync (complete buffer): sample %lu expected, but got %ld",
- gst_alsa_bytes_to_samples (this, GST_BUFFER_SIZE (buf)), expected,
- samplestamp);
- /* this buffer is way behind */
- gst_buffer_unref (buf);
- sink->gst_data[i] = NULL;
- continue;
- } else if (sample_diff < 0) {
- gint difference = gst_alsa_samples_to_bytes (this, -sample_diff);
-
- GST_INFO_OBJECT (this,
- "Skipping %lu samples to resync: sample %lu expected, but got %ld",
- (gulong) - sample_diff, expected, samplestamp);
- /* this buffer is only a bit behind */
- sink->size[i] = GST_BUFFER_SIZE (buf) - difference;
- sink->buf_data[i] = GST_BUFFER_DATA (buf) + difference;
- sink->behaviour[i] = 0;
- } else {
- g_assert_not_reached ();
- }
- }
- bytes = MIN (bytes, sink->size[i]);
- }
+ cptr = length / alsa->bytes_per_sample;
+ ptr = data;
- /* check how many bytes we still have in all our bytestreams */
- /* initialize this value to a somewhat sane state, we might alloc
- * this much data below (which would be a bug, but who knows)... */
- bytes = MIN (bytes,
- this->period_size * this->period_count * element->numpads * 8);
- /* must be > max sample size in bytes */
-
- /* Not enough space. We grab data nonetheless and sleep afterwards */
- if (avail < this->period_size)
- avail = this->period_size;
- avail = MIN (avail, gst_alsa_bytes_to_samples (this, bytes));
-
- /* wait until the hw buffer has enough space */
- while (gst_element_get_state (element) == GST_STATE_PLAYING
- && (avail2 = gst_alsa_update_avail (this)) < avail) {
- if (avail2 <= -EPIPE)
- goto sink_restart;
- if (avail2 < 0)
- return;
- if (avail2 < avail
- && snd_pcm_state (this->handle) != SND_PCM_STATE_RUNNING)
- if (!gst_alsa_start (this))
- return;
- if (gst_alsa_pcm_wait (this) == FALSE)
- return;
- }
+ while (cptr > 0) {
+ err = snd_pcm_writei (alsa->handle, ptr, cptr);
- /* FIXME: lotsa stuff can have happened while fetching data.
- * Do we need to check something? */
-
- /* put this data into alsa */
- if ((copied = this->transmit (this, &avail)) < 0)
- return;
- /* update our clock */
- this->played += copied;
- /* flush the data */
- bytes = gst_alsa_samples_to_bytes (this, copied);
- for (i = 0; i < element->numpads; i++) {
- if ((sink->size[i] -= bytes) == 0) {
- gst_alsa_sink_flush_one_pad (sink, i);
+ if (err < 0) {
+ if (err == -EAGAIN) {
+ GST_DEBUG ("Write error: %s", snd_strerror (err));
continue;
+ } else if (xrun_recovery (alsa->handle, err) < 0) {
+ goto write_error;
}
- g_assert (sink->size[i] > 0);
- if (sink->behaviour[i] != 1)
- sink->buf_data[i] += bytes;
+ continue;
}
- } else if (avail == 0 && gst_element_get_state (element) == GST_STATE_PLAYING) {
- if (gst_alsa_pcm_wait (this) == FALSE)
- return;
- }
- if (snd_pcm_state (this->handle) != SND_PCM_STATE_RUNNING
- && snd_pcm_avail_update (this->handle) == 0) {
- gst_alsa_start (this);
+ ptr += err * alsa->channels;
+ cptr -= err;
}
+ return length - cptr;
+
+write_error:
+ {
+ return length; /* skip one period */
+ }
}
-static GstElementStateReturn
-gst_alsa_sink_change_state (GstElement * element)
+static guint
+gst_alsasink_delay (GstAudioSink * asink)
{
- GstAlsaSink *sink;
-
- g_return_val_if_fail (element != NULL, FALSE);
- sink = GST_ALSA_SINK (element);
+ GstAlsaSink *alsa;
+ snd_pcm_sframes_t delay;
- switch (GST_STATE_TRANSITION (element)) {
- case GST_STATE_NULL_TO_READY:
- case GST_STATE_READY_TO_PAUSED:
- case GST_STATE_PAUSED_TO_PLAYING:
- case GST_STATE_PLAYING_TO_PAUSED:
- break;
- case GST_STATE_PAUSED_TO_READY:
- gst_alsa_sink_flush_pads (sink);
- break;
- case GST_STATE_READY_TO_NULL:
- break;
- default:
- break;
- }
+ alsa = GST_ALSA_SINK (asink);
- if (GST_ELEMENT_CLASS (sink_parent_class)->change_state)
- return GST_ELEMENT_CLASS (sink_parent_class)->change_state (element);
+ snd_pcm_delay (alsa->handle, &delay);
- return GST_STATE_SUCCESS;
+ return delay;
}
-static GstClockTime
-gst_alsa_sink_get_time (GstAlsa * this)
+static void
+gst_alsasink_reset (GstAudioSink * asink)
{
- snd_pcm_sframes_t delay;
- if (!this->format)
- return 0;
- if (!GST_FLAG_IS_SET (this, GST_ALSA_RUNNING)) {
- delay = 0;
- } else if (snd_pcm_delay (this->handle, &delay) != 0) {
- delay = 0;
+#if 0
+ GstAlsaSink *alsa;
+ gint err;
+
+ alsa = GST_ALSA_SINK (asink);
+
+ CHECK (snd_pcm_drop (alsa->handle), drop_error);
+ CHECK (snd_pcm_prepare (alsa->handle), prepare_error);
+
+ return;
+
+ /* ERRORS */
+drop_error:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("alsa-reset: pcm drop error: %s", snd_strerror (err)), (NULL));
+ return;
}
- if (this->played <= delay) {
- return 0;
+prepare_error:
+ {
+ GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_READ,
+ ("alsa-reset: pcm prepare error: %s", snd_strerror (err)), (NULL));
+ return;
}
-
- return GST_SECOND * (this->played - delay) / this->format->rate;
+#endif
}
projects / platform / upstream / gst-plugins-base.git / commitdiff