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next big bunch of stuff:

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Original commit message from CVS:
next big bunch of stuff:
- proper caps setting in alsasrc
- query / conversion functions
WARNING: Alsa 0.9.2 is heavily borked wrt recording - expect segfaults
This commit is contained in:
Benjamin Otte 2003-05-15 16:32:22 +00:00
parent 8162e4b296
commit 3b983a1788
2 changed files with 270 additions and 54 deletions
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282
ext/alsa/gstalsa.c
View file

@ -123,7 +123,7 @@ static void gst_alsa_src_loop (GstElement * element);
static void gst_alsa_src_flush (GstAlsaSrc * src);
static GstElementStateReturn gst_alsa_src_change_state (GstElement * element);
/* GStreamer functions for pads and state changing */
/* GStreamer functions for pads, queries, conversions and state changing */
static GstPad * gst_alsa_request_new_pad (GstElement * element,
GstPadTemplate * templ,
const gchar * name);
@ -135,9 +135,32 @@ static GstCaps * gst_alsa_caps (snd_pcm_format_t format,
gint rate,
gint channels);
static GstElementStateReturn gst_alsa_change_state (GstElement * element);
static const GstFormat * gst_alsa_get_formats (GstPad * pad);
static gboolean gst_alsa_convert (GstAlsa * this,
GstFormat src_format,
gint64 src_value,
GstFormat * dest_format,
gint64 * dest_value);
static gboolean gst_alsa_pad_convert (GstPad * pad,
GstFormat src_format,
gint64 src_value,
GstFormat * dest_format,
gint64 * dest_value);
static const GstQueryType * gst_alsa_get_query_types (GstPad * pad);
static gboolean gst_alsa_query_func (GstElement * element,
GstQueryType type,
GstFormat * format,
gint64 * value);
static gboolean gst_alsa_query (GstElement * element,
GstQueryType type,
GstFormat * format,
gint64 * value);
static gboolean gst_alsa_pad_query (GstPad * pad,
GstQueryType type,
GstFormat * format,
gint64 * value);
/* audio processing functions */
static void gst_alsa_src_loop (GstElement * element);
static void gst_alsa_xrun_recovery (GstAlsa * this);
inline static snd_pcm_sframes_t gst_alsa_update_avail (GstAlsa * this);
inline static gboolean gst_alsa_pcm_wait (GstAlsa * this);
@ -275,10 +298,11 @@ gst_alsa_class_init (GstAlsaClass *klass)
g_param_spec_uint64 ("max-discont", "Maximum Discontinuity", "GStreamer timeunits before the timestamp syncing starts dropping/insertting samples",
/* rounding errors */ 1000, GST_SECOND, GST_ALSA_DEFAULT_DISCONT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
element_class->change_state = gst_alsa_change_state;
element_class->request_new_pad = gst_alsa_request_new_pad;
element_class->set_clock = gst_alsa_set_clock;
element_class->get_clock = gst_alsa_get_clock;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_alsa_change_state);
element_class->query = GST_DEBUG_FUNCPTR (gst_alsa_query);
element_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_alsa_request_new_pad);
element_class->set_clock = GST_DEBUG_FUNCPTR (gst_alsa_set_clock);
element_class->get_clock = GST_DEBUG_FUNCPTR (gst_alsa_get_clock);
}
static void
@ -970,35 +994,97 @@ gst_alsa_src_read (GstAlsa *this, snd_pcm_sframes_t *avail)
}
return err;
}
static gboolean
gst_alsa_src_set_caps (GstAlsaSrc *src)
static inline gint
gst_alsa_adjust_rate (gint rate, gboolean aggressive)
{
static gint rates[] = { 96000, 48000, 44100, 22050, 8000 };
gint i;
GstCaps *caps;
if (aggressive)
return rate;
for (i = 0; i < G_N_ELEMENTS (rates); i--) {
if (rate > rates[i])
return rates[i];
}
return 0;
}
static gboolean
gst_alsa_src_set_caps (GstAlsaSrc *src, gboolean aggressive)
{
GstCaps *all_caps, *caps, *walk;
gint channels, min_channels, max_channels;
gint rate, min_rate, max_rate;
gint i, law, endian, width, depth;
gboolean sign;
GstAlsa *this = GST_ALSA (src);
if (!(this->format = g_new (GstAlsaFormat, 1)))
return FALSE;
/* FIXME: make this do proper caps nego */
this->format->format = SND_PCM_FORMAT_S16;
this->format->rate = 44100;
this->format->channels = GST_ELEMENT (src)->numpads;
GST_DEBUG (GST_CAT_NEGOTIATION, "starting caps negotiation on alsa src");
caps = gst_alsa_caps (this->format->format, this->format->rate, this->format->channels);
all_caps = gst_alsa_get_caps (this->pad[0], NULL);
if (all_caps == NULL) return FALSE;
/* now intersect this with all caps of the peers... */
for (i = 0; i < GST_ELEMENT (src)->numpads; i++) {
if (gst_pad_try_set_caps (this->pad[i], caps) <= 0) {
GST_DEBUG (GST_CAT_NEGOTIATION, "setting caps (%p) in alsasrc (%p) on pad %d failed", caps, this, i);
all_caps = gst_caps_intersect (all_caps, gst_pad_get_caps (this->pad[i]));
if (all_caps == NULL) {
GST_DEBUG (GST_CAT_NEGOTIATION, "No compatible caps found in alsasrc (%s)", GST_ELEMENT_NAME (this));
return FALSE;
}
}
if (GST_FLAG_IS_SET (this, GST_ALSA_RUNNING)) gst_alsa_stop_audio (this);
if (!gst_alsa_start_audio (this)) {
/* FIXME: Try the next format */
return FALSE;
/* construct caps */
caps = GST_CAPS_NEW ("alsasrc caps", "audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"rate", GST_PROPS_INT (44100),
"channels", GST_PROPS_INT (1));
gst_caps_ref (caps);
gst_caps_sink (caps);
/* now try to find the best match */
walk = all_caps;
while (walk) {
gst_caps_get (walk, "law", &law, "signed", &sign, "width", &width, "depth", &depth, NULL);
if (gst_caps_has_property (walk, "endianness")) {
gst_caps_get_int (walk, "endianness", &endian);
} else {
endian = G_BYTE_ORDER;
}
gst_caps_set (caps, "law", GST_PROPS_INT (law));
gst_caps_set (caps, "endianness", GST_PROPS_INT (endian));
gst_caps_set (caps, "width", GST_PROPS_INT (width));
gst_caps_set (caps, "depth", GST_PROPS_INT (depth));
gst_caps_set (caps, "signed", GST_PROPS_BOOLEAN (sign));
gst_props_entry_get_int_range (gst_props_get_entry (GST_CAPS_PROPERTIES (walk), "rate"), &min_rate, &max_rate);
gst_props_entry_get_int_range (gst_props_get_entry (GST_CAPS_PROPERTIES (walk), "channels"), &min_channels, &max_channels);
for (rate = max_rate;; rate--) {
if ((rate = gst_alsa_adjust_rate (rate, aggressive)) < min_rate)
break;
gst_caps_set (caps, "rate", GST_PROPS_INT (rate));
for (channels = aggressive ? max_channels : MIN (max_channels, 2); channels >= min_channels; channels--) {
gst_caps_set (caps, "channels", GST_PROPS_INT (channels));
g_print ("trying new caps: law %d, %ssigned, endianness: %d, width %d, depth %d, channels %d, rate %d\n",
law, sign ? "" : "un", endian, width, depth, channels, rate);
if (gst_pad_try_set_caps (this->pad[0], caps))
gst_alsa_link (this->pad[0], caps);
if (this->format) {
/* try to set caps here */
return TRUE;
}
}
}
walk = GST_CAPS_NEXT (walk);
}
return TRUE;
if (!aggressive)
return gst_alsa_src_set_caps (src, TRUE);
return FALSE;
}
/* we transmit buffers of period_size frames */
static void
@ -1011,7 +1097,7 @@ gst_alsa_src_loop (GstElement *element)
/* set the caps on all pads */
if (!this->format) {
if (!gst_alsa_src_set_caps (src)) {
if (!gst_alsa_src_set_caps (src, FALSE)) {
gst_element_error (element, "Could not set caps");
return;
}
@ -1102,7 +1188,7 @@ gst_alsa_src_change_state (GstElement *element)
return GST_STATE_SUCCESS;
}
/*** GSTREAMER PAD / STATE FUNCTIONS*******************************************/
/*** GSTREAMER PAD / QUERY / CONVERSION / STATE FUNCTIONS *********************/
static GstPad *
gst_alsa_request_new_pad (GstElement *element, GstPadTemplate *templ,
@ -1146,7 +1232,11 @@ found_channel:
gst_pad_set_link_function (this->pad[channel], gst_alsa_link);
gst_pad_set_getcaps_function (this->pad[channel], gst_alsa_get_caps);
gst_element_add_pad (GST_ELEMENT (this), this->pad[channel]);
gst_pad_set_convert_function (this->pad[channel], gst_alsa_pad_convert);
gst_pad_set_query_function (this->pad[channel], gst_alsa_pad_query);
gst_pad_set_query_type_function (this->pad[channel], gst_alsa_get_query_types);
gst_pad_set_formats_function (this->pad[channel], gst_alsa_get_formats);
return this->pad[channel];
}
@ -1583,6 +1673,138 @@ gst_alsa_change_state (GstElement *element)
return GST_STATE_SUCCESS;
}
static const GstFormat *
gst_alsa_get_formats (GstPad *pad)
{
static const GstFormat formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_UNITS,
GST_FORMAT_BYTES,
0
};
return formats;
}
static gboolean
gst_alsa_pad_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
return gst_alsa_convert (GST_ALSA (GST_PAD_PARENT (pad)), src_format, src_value, dest_format, dest_value);
}
static gboolean
gst_alsa_convert (GstAlsa *this, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
if (src_format == *dest_format || (src_format == GST_FORMAT_UNITS && *dest_format == GST_FORMAT_DEFAULT)) {
*dest_format = GST_FORMAT_UNITS;
*dest_value = src_value;
return TRUE;
}
if (this->format == NULL)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_UNITS;
case GST_FORMAT_TIME:
*dest_value = gst_alsa_bytes_to_timestamp (this, (guint) src_value);
break;
case GST_FORMAT_UNITS:
*dest_value = gst_alsa_samples_to_timestamp (this, (guint) src_value);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_UNITS;
case GST_FORMAT_UNITS:
*dest_value = gst_alsa_timestamp_to_samples (this, (GstClockTime) src_value);
break;
case GST_FORMAT_BYTES:
*dest_value = gst_alsa_timestamp_to_bytes (this, (GstClockTime) src_value);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_alsa_samples_to_timestamp (this, (guint) src_value);
break;
case GST_FORMAT_BYTES:
*dest_value = gst_alsa_samples_to_bytes (this, (guint) src_value);
break;
case GST_FORMAT_DEFAULT:
g_assert_not_reached ();
/* fall through */
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
}
return res;
}
static const GstQueryType *
gst_alsa_get_query_types (GstPad *pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_LATENCY,
GST_QUERY_POSITION,
0,
};
return query_types;
}
static gboolean
gst_alsa_query_func (GstElement *element, GstQueryType type, GstFormat *format, gint64 *value)
{
gboolean res = FALSE;
GstAlsa *this = GST_ALSA (element);
switch (type) {
case GST_QUERY_LATENCY: {
snd_pcm_sframes_t delay;
ERROR_CHECK (snd_pcm_delay (this->handle, &delay), "Error getting delay: %s");
res = gst_alsa_convert (this, GST_FORMAT_UNITS, (gint64) delay, format, value);
break;
}
case GST_QUERY_POSITION:
res = gst_alsa_convert (this, GST_FORMAT_UNITS, this->transmitted, format, value);
break;
default:
break;
}
return res;
}
static gboolean
gst_alsa_query (GstElement *element, GstQueryType type, GstFormat *format, gint64 *value)
{
return gst_alsa_pad_query (GST_ALSA (element)->pad[0], type, format, value);
}
static gboolean
gst_alsa_pad_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value)
{
if (gst_alsa_query_func (GST_PAD_PARENT (pad), type, format, value))
return TRUE;
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK && gst_pad_query (gst_pad_get_peer (pad), type, format, value))
return TRUE;
return FALSE;
}
/*** AUDIO PROCESSING *********************************************************/
@ -1630,8 +1852,6 @@ gst_alsa_pcm_wait (GstAlsa *this)
inline static gboolean
gst_alsa_start (GstAlsa *this)
{
//gint avail;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Setting state to RUNNING");
switch (snd_pcm_state(this->handle)) {
@ -1659,9 +1879,6 @@ gst_alsa_start (GstAlsa *this)
g_assert_not_reached ();
break;
}
/* avail = (gint) gst_alsa_update_avail (this);
if (avail < 0)
return FALSE;*/
gst_alsa_clock_start (this->clock);
return TRUE;
}
@ -1882,7 +2099,6 @@ gst_alsa_start_audio (GstAlsa *this)
GST_FLAG_SET (this, GST_ALSA_RUNNING);
return TRUE;
}
static gboolean
gst_alsa_drain_audio (GstAlsa *this)
{

42
ext/alsa/gstalsa.h
View file

@ -36,30 +36,30 @@
should be big enough to allow smoothing errors on different video formats */
#define GST_ALSA_DEFAULT_DISCONT (GST_SECOND / 10)
#define GST_ALSA(obj) G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA, GstAlsa)
#define GST_ALSA_CLASS(klass) G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA, GstAlsaClass)
#define GST_ALSA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_ALSA, GstAlsaClass))
#define GST_IS_ALSA(obj) G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA)
#define GST_IS_ALSA_CLASS(klass) G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA)
#define GST_TYPE_ALSA gst_alsa_get_type()
#define GST_ALSA(obj) (G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA, GstAlsa))
#define GST_ALSA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA, GstAlsaClass))
#define GST_ALSA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_ALSA, GstAlsaClass))
#define GST_IS_ALSA(obj) (G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA))
#define GST_IS_ALSA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA))
#define GST_TYPE_ALSA (gst_alsa_get_type())
#define GST_ALSA_SINK(obj) G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA_SINK, GstAlsaSink)
#define GST_ALSA_SINK_CLASS(klass) G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA_SINK, GstAlsaSinkClass)
#define GST_IS_ALSA_SINK(obj) G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA_SINK)
#define GST_IS_ALSA_SINK_CLASS(klass) G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA_SINK)
#define GST_TYPE_ALSA_SINK gst_alsa_sink_get_type()
#define GST_ALSA_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA_SINK, GstAlsaSink))
#define GST_ALSA_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA_SINK, GstAlsaSinkClass))
#define GST_IS_ALSA_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA_SINK))
#define GST_IS_ALSA_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA_SINK))
#define GST_TYPE_ALSA_SINK (gst_alsa_sink_get_type())
#define GST_ALSA_SRC(obj) G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA_SRC, GstAlsaSrc)
#define GST_ALSA_SRC_CLASS(klass) G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA_SRC, GstAlsaSrcClass)
#define GST_IS_ALSA_SRC(obj) G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA_SRC)
#define GST_IS_ALSA_SRC_CLASS(klass) G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA_SRC)
#define GST_TYPE_ALSA_SRC gst_alsa_src_get_type()
#define GST_ALSA_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST(obj, GST_TYPE_ALSA_SRC, GstAlsaSrc))
#define GST_ALSA_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST(klass, GST_TYPE_ALSA_SRC, GstAlsaSrcClass))
#define GST_IS_ALSA_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE(obj, GST_TYPE_ALSA_SRC))
#define GST_IS_ALSA_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE(klass, GST_TYPE_ALSA_SRC))
#define GST_TYPE_ALSA_SRC (gst_alsa_src_get_type())
#define GST_ALSA_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_CLOCK,GstAlsaClock))
#define GST_ALSA_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_CLOCK,GstAlsaClockClass))
#define GST_IS_ALSA_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_CLOCK))
#define GST_IS_ALSA_CLOCK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_CLOCK))
#define GST_TYPE_ALSA_CLOCK (gst_alsa_clock_get_type())
#define GST_ALSA_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_CLOCK,GstAlsaClock))
#define GST_ALSA_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_CLOCK,GstAlsaClockClass))
#define GST_IS_ALSA_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_CLOCK))
#define GST_IS_ALSA_CLOCK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_CLOCK))
#define GST_TYPE_ALSA_CLOCK (gst_alsa_clock_get_type())
/* I would have preferred to avoid this variety of trickery, but without it i
* can't tell whether I'm a source or a sink upon creation. */