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Add timestamps add some convert/query functions

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Original commit message from CVS:
Add timestamps
add some convert/query functions
This commit is contained in:
Wim Taymans 2002-06-02 20:09:43 +00:00
parent f311f50684
commit 787b9827ea
2 changed files with 119 additions and 1 deletions
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119
ext/sidplay/gstsiddec.cc
View file

@ -201,6 +201,11 @@ static void gst_siddec_init (GstSidDec *siddec);
static void gst_siddec_loop (GstElement *element);
static gboolean gst_siddec_src_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_siddec_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value);
static void gst_siddec_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_siddec_set_property (GObject *object, guint prop_id,
@ -301,9 +306,14 @@ gst_siddec_init (GstSidDec *siddec)
siddec->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_templ), "sink");
gst_element_add_pad (GST_ELEMENT (siddec), siddec->sinkpad);
gst_pad_set_query_function (siddec->sinkpad, NULL);
gst_pad_set_convert_function (siddec->sinkpad, NULL);
siddec->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (src_templ), "src");
gst_pad_set_event_function (siddec->srcpad, NULL);
gst_pad_set_convert_function (siddec->srcpad, gst_siddec_src_convert);
gst_pad_set_query_function (siddec->srcpad, gst_siddec_src_query);
gst_element_add_pad (GST_ELEMENT (siddec), siddec->srcpad);
gst_element_set_loop_function (GST_ELEMENT (siddec), gst_siddec_loop);
@ -337,6 +347,7 @@ gst_siddec_init (GstSidDec *siddec)
siddec->tune_buffer = (guchar *) g_malloc (maxSidtuneFileLen);
siddec->tune_len = 0;
siddec->tune_number = 1;
siddec->total_bytes = 0;
}
static void
@ -355,10 +366,12 @@ gst_siddec_loop (GstElement *element)
case GST_EVENT_EOS:
siddec->state = SID_STATE_LOAD_TUNE;
break;
case GST_EVENT_DISCONTINUOUS:
break;
default:
// bail out, we're not going to do anything
gst_element_set_eos (element);
gst_pad_send_event (siddec->srcpad, gst_event_new (GST_EVENT_EOS));
gst_element_set_eos (element);
break;
}
}
@ -399,6 +412,8 @@ gst_siddec_loop (GstElement *element)
}
if (siddec->state == SID_STATE_PLAY_TUNE) {
GstBuffer *out = gst_buffer_new ();
GstFormat format;
gint64 value;
GST_BUFFER_SIZE (out) = 4096;
GST_BUFFER_DATA (out) = (guchar *)g_malloc (4096);
@ -406,10 +421,112 @@ gst_siddec_loop (GstElement *element)
sidEmuFillBuffer (*siddec->engine, *siddec->tune,
GST_BUFFER_DATA (out), GST_BUFFER_SIZE (out));
format = GST_FORMAT_TIME;
gst_siddec_src_query (siddec->srcpad, GST_PAD_QUERY_POSITION, &format, &value);
GST_BUFFER_TIMESTAMP (out) = value;
siddec->total_bytes += 4096;
gst_pad_push (siddec->srcpad, out);
}
}
static gboolean
gst_siddec_src_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
guint scale = 1;
GstSidDec *siddec;
gint bytes_per_sample;
siddec = GST_SIDDEC (gst_pad_get_parent (pad));
bytes_per_sample = (siddec->config->bitsPerSample>>3) * siddec->config->channels;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_UNITS:
if (bytes_per_sample == 0)
return FALSE;
*dest_value = src_value / bytes_per_sample;
break;
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
{
gint byterate = bytes_per_sample * siddec->config->frequency;
if (byterate == 0)
return FALSE;
*dest_value = src_value * GST_SECOND / byterate;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * bytes_per_sample;
break;
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
if (siddec->config->frequency == 0)
return FALSE;
*dest_value = src_value * GST_SECOND / siddec->config->frequency;
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:
scale = bytes_per_sample;
/* fallthrough */
case GST_FORMAT_UNITS:
*dest_value = src_value * scale * siddec->config->frequency / GST_SECOND;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_siddec_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstSidDec *siddec;
siddec = GST_SIDDEC (gst_pad_get_parent (pad));
switch (type) {
case GST_PAD_QUERY_POSITION:
/* we only know about our bytes, convert to requested format */
res &= gst_pad_convert (pad,
GST_FORMAT_BYTES, siddec->total_bytes,
format, value);
break;
default:
res = FALSE;
break;
}
return res;
}
static void
gst_siddec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{

1
ext/sidplay/gstsiddec.h
View file

@ -57,6 +57,7 @@ struct _GstSidDec {
guchar *tune_buffer;
gint tune_len;
gint tune_number;
guint64 total_bytes;
emuEngine *engine;
sidTune *tune;