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Some query and convert functions.

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Original commit message from CVS:
Some query and convert functions.
This commit is contained in:
Wim Taymans 2002-06-01 11:00:27 +00:00
parent ba742744c6
commit 9b020fb093
2 changed files with 109 additions and 5 deletions
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113
sys/oss/gstosssink.c
View file

@ -53,6 +53,11 @@ static void gst_osssink_set_clock (GstElement *element, GstClock *clock);
static GstClock* gst_osssink_get_clock (GstElement *element);
static GstClockTime gst_osssink_get_time (GstClock *clock, gpointer data);
static gboolean gst_osssink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_osssink_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value);
static GstPadConnectReturn gst_osssink_sinkconnect (GstPad *pad, GstCaps *caps);
static void gst_osssink_set_property (GObject *object, guint prop_id, const GValue *value,
@ -230,6 +235,8 @@ gst_osssink_init (GstOssSink *osssink)
gst_element_add_pad (GST_ELEMENT (osssink), osssink->sinkpad);
gst_pad_set_connect_function (osssink->sinkpad, gst_osssink_sinkconnect);
gst_pad_set_bufferpool_function (osssink->sinkpad, gst_osssink_get_bufferpool);
gst_pad_set_convert_function (osssink->sinkpad, gst_osssink_convert);
gst_pad_set_query_function (osssink->sinkpad, gst_osssink_query);
gst_pad_set_chain_function (osssink->sinkpad, gst_osssink_chain);
@ -264,7 +271,7 @@ gst_osssink_init (GstOssSink *osssink)
static GstPadConnectReturn
gst_osssink_sinkconnect (GstPad *pad, GstCaps *caps)
{
gint law, endianness, width, depth;
gint law, endianness, depth;
gboolean sign;
gint format = -1;
GstOssSink *osssink = GST_OSSSINK (gst_pad_get_parent (pad));
@ -272,10 +279,10 @@ gst_osssink_sinkconnect (GstPad *pad, GstCaps *caps)
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_CONNECT_DELAYED;
gst_caps_get_int (caps, "width", &width);
gst_caps_get_int (caps, "width", &osssink->width);
gst_caps_get_int (caps, "depth", &depth);
if (width != depth)
if (osssink->width != depth)
return GST_PAD_CONNECT_REFUSED;
/* laws 1 and 2 are 1 bps anyway */
@ -286,7 +293,7 @@ gst_osssink_sinkconnect (GstPad *pad, GstCaps *caps)
gst_caps_get_boolean (caps, "signed", &sign);
if (law == 0) {
if (width == 16) {
if (osssink->width == 16) {
if (sign == TRUE) {
if (endianness == G_LITTLE_ENDIAN)
format = AFMT_S16_LE;
@ -301,7 +308,7 @@ gst_osssink_sinkconnect (GstPad *pad, GstCaps *caps)
}
osssink->bps = 2;
}
else if (width == 8) {
else if (osssink->width == 8) {
if (sign == TRUE) {
format = AFMT_S8;
}
@ -407,6 +414,9 @@ gst_osssink_get_delay (GstOssSink *osssink)
{
gint delay = 0;
if (osssink->fd == -1)
return 0;
if (ioctl (osssink->fd, SNDCTL_DSP_GETODELAY, &delay) < 0) {
audio_buf_info info;
if (ioctl (osssink->fd, SNDCTL_DSP_GETOSPACE, &info) < 0) {
@ -559,6 +569,99 @@ gst_osssink_chain (GstPad *pad, GstBuffer *buf)
gst_buffer_unref (buf);
}
static gboolean
gst_osssink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstOssSink *osssink;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
osssink = GST_OSSSINK (gst_pad_get_parent (pad));
if (osssink->bps == 0 || osssink->channels == 0 || osssink->width == 0)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / osssink->bps;
break;
case GST_FORMAT_SAMPLES:
*dest_value = src_value / (osssink->channels * osssink->width);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_BYTES;
case GST_FORMAT_BYTES:
*dest_value = src_value * osssink->bps / GST_SECOND;
break;
case GST_FORMAT_SAMPLES:
*dest_value = osssink->frequency;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_SAMPLES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / osssink->frequency;
break;
case GST_FORMAT_BYTES:
*dest_value = src_value * osssink->channels * osssink->width;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_osssink_query (GstPad *pad, GstPadQueryType type, GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstOssSink *osssink;
osssink = GST_OSSSINK (gst_pad_get_parent (pad));
switch (type) {
case GST_PAD_QUERY_LATENCY:
if (!gst_osssink_convert (pad,
GST_FORMAT_BYTES, gst_osssink_get_delay (osssink),
format, value))
{
res = FALSE;
}
break;
default:
res = FALSE;
break;
}
return res;
}
static void
gst_osssink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{

1
sys/oss/gstosssink.h
View file

@ -74,6 +74,7 @@ struct _GstOssSink {
int fd;
int caps; /* the capabilities */
gint format;
gint width;
gint channels;
gint frequency;
gint fragment;