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docs/plugins/: Added wavparse docs.

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Original commit message from CVS:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
Added wavparse docs.
* gst/wavparse/gstwavparse.c: (gst_wavparse_class_init),
(gst_wavparse_reset), (gst_wavparse_init),
(gst_wavparse_create_sourcepad), (gst_wavparse_parse_file_header),
(gst_wavparse_stream_init), (gst_wavparse_perform_seek),
(gst_wavparse_stream_headers), (gst_wavparse_send_event),
(gst_wavparse_stream_data), (gst_wavparse_loop),
(gst_wavparse_srcpad_event), (gst_wavparse_sink_activate_pull),
(gst_wavparse_change_state):
* gst/wavparse/gstwavparse.h:
Implement seek in READY (fixes #327658)
Added docs and did some cleanups.
This commit is contained in:
Wim Taymans 2006-03-03 18:36:53 +00:00
parent 320dea6afe
commit 11d9e3d4b1
6 changed files with 146 additions and 21 deletions
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19
ChangeLog
View file

@ -1,3 +1,22 @@
2006-03-03 Wim Taymans <wim@fluendo.com>
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
Added wavparse docs.
* gst/wavparse/gstwavparse.c: (gst_wavparse_class_init),
(gst_wavparse_reset), (gst_wavparse_init),
(gst_wavparse_create_sourcepad), (gst_wavparse_parse_file_header),
(gst_wavparse_stream_init), (gst_wavparse_perform_seek),
(gst_wavparse_stream_headers), (gst_wavparse_send_event),
(gst_wavparse_stream_data), (gst_wavparse_loop),
(gst_wavparse_srcpad_event), (gst_wavparse_sink_activate_pull),
(gst_wavparse_change_state):
* gst/wavparse/gstwavparse.h:
Implement seek in READY (fixes #327658)
Added docs and did some cleanups.
2006-03-03 Tim-Philipp Müller <tim at centricular dot net>
* gst/avi/gstavidemux.c: (gst_avi_demux_handle_src_query),

1
docs/plugins/Makefile.am
View file

@ -80,6 +80,7 @@ EXTRA_HFILES = \
$(top_srcdir)/gst/level/gstlevel.h \
$(top_srcdir)/gst/goom/gstgoom.h \
$(top_srcdir)/gst/id3demux/gstid3demux.h \
$(top_srcdir)/gst/wavparse/gstwavparse.h \
$(top_srcdir)/ext/cairo/gsttimeoverlay.h \
$(top_srcdir)/ext/cdio/gstcdiocddasrc.h \
$(top_srcdir)/ext/dv/gstdvdec.h \

1
docs/plugins/gst-plugins-good-plugins-docs.sgml
View file

@ -36,6 +36,7 @@
<xi:include href="xml/element-videobalance.xml" />
<xi:include href="xml/element-videoflip.xml" />
<xi:include href="xml/element-videomixer.xml" />
<xi:include href="xml/element-wavparse.xml" />
</chapter>
<chapter>

15
docs/plugins/gst-plugins-good-plugins-sections.txt
View file

@ -255,3 +255,18 @@ GstVideoMixerBackground
GstVideoMixerClass
</SECTION>
<SECTION>
<FILE>element-wavparse</FILE>
GstWavParse
<TITLE>wavparse</TITLE>
<SUBSECTION Standard>
GstWavParseClass
GstWavParseState
GST_WAVPARSE
GST_IS_WAVPARSE
GST_TYPE_WAVPARSE
gst_wavparse_get_type
GST_WAVPARSE_CLASS
GST_IS_WAVPARSE_CLASS
</SECTION>

122
gst/wavparse/gstwavparse.c
View file

@ -18,6 +18,28 @@
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-wavparse
*
* <refsect2>
* <para>
* Parse a .wav file into raw or compressed audio.
* </para>
* <para>
* This element currently only supports pull based scheduling.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch filesrc sine.wav ! wavparse ! audioconvert ! alsasink
* </programlisting>
* Read a wav file and output to the soundcard using the ALSA element. The
* wav file is assumed to contain raw uncompressed samples.
* </para>
* </refsect2>
*
* Last reviewed on 2006-03-03 (0.10.3)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
@ -29,10 +51,6 @@
#include "gst/riff/riff-media.h"
#include <gst/gst-i18n-plugin.h>
#ifndef G_MAXUINT32
#define G_MAXUINT32 0xffffffff
#endif
GST_DEBUG_CATEGORY_STATIC (wavparse_debug);
#define GST_CAT_DEFAULT (wavparse_debug)
@ -43,6 +61,8 @@ static void gst_wavparse_init (GstWavParse * wavparse);
static gboolean gst_wavparse_sink_activate (GstPad * sinkpad);
static gboolean gst_wavparse_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_wavparse_send_event (GstElement * element,
GstEvent * event);
static GstStateChangeReturn gst_wavparse_change_state (GstElement * element,
GstStateChange transition);
@ -64,6 +84,10 @@ GST_STATIC_PAD_TEMPLATE ("wavparse_sink",
GST_STATIC_CAPS ("audio/x-wav")
);
/* the pad is marked a sometimes and is added to the element when the
* exact type is known. This makes it much easier for a static autoplugger
* to connect the right decoder when needed.
*/
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("wavparse_src",
GST_PAD_SRC,
@ -158,10 +182,12 @@ gst_wavparse_class_init (GstWavParseClass * klass)
gstelement_class = (GstElementClass *) klass;
object_class = (GObjectClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
parent_class = g_type_class_peek_parent (klass);
object_class->get_property = gst_wavparse_get_property;
gstelement_class->change_state = gst_wavparse_change_state;
gstelement_class->send_event = gst_wavparse_send_event;
GST_DEBUG_CATEGORY_INIT (wavparse_debug, "wavparse", 0, "WAV parser");
}
@ -184,9 +210,7 @@ gst_wavparse_reset (GstWavParse * wavparse)
wavparse->datasize = 0;
wavparse->datastart = 0;
if (wavparse->seek_event)
gst_event_unref (wavparse->seek_event);
wavparse->seek_event = NULL;
gst_event_replace (&wavparse->seek_event, NULL);
/* we keep the segment info in time */
gst_segment_init (&wavparse->segment, GST_FORMAT_TIME);
@ -195,16 +219,17 @@ gst_wavparse_reset (GstWavParse * wavparse)
static void
gst_wavparse_init (GstWavParse * wavparse)
{
gst_wavparse_reset (wavparse);
/* sink */
wavparse->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->sinkpad);
gst_pad_set_activate_function (wavparse->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavparse_sink_activate));
gst_pad_set_activatepull_function (wavparse->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavparse_sink_activate_pull));
gst_wavparse_reset (wavparse);
gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->sinkpad);
}
static void
@ -221,6 +246,7 @@ gst_wavparse_create_sourcepad (GstWavParse * wavparse)
{
GstPadTemplate *templ;
/* destroy previous one */
gst_wavparse_destroy_sourcepad (wavparse);
/* source */
@ -513,6 +539,7 @@ gst_wavparse_parse_file_header (GstElement * element, GstBuffer * buf)
return TRUE;
/* ERRORS */
not_wav:
{
GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL),
@ -531,7 +558,6 @@ gst_wavparse_stream_init (GstWavParse * wav)
if ((res = gst_pad_pull_range (wav->sinkpad,
wav->offset, 12, &buf)) != GST_FLOW_OK)
return res;
else if (!gst_wavparse_parse_file_header (GST_ELEMENT (wav), buf))
return GST_FLOW_ERROR;
@ -698,6 +724,14 @@ gst_wavparse_other (GstWavParse * wav)
}
#endif
/* This function is used to perform seeks on the element in
* pull mode.
*
* It also works when event is NULL, in which case it will just
* start from the last configured segment. This technique is
* used when activating the element and to perform the seek in
* READY.
*/
static gboolean
gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event)
{
@ -711,9 +745,10 @@ gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event)
gboolean update;
GstSegment seeksegment;
GST_DEBUG_OBJECT (wav, "doing seek");
if (event) {
GST_DEBUG_OBJECT (wav, "doing seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
@ -734,6 +769,7 @@ gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event)
format = fmt;
}
} else {
GST_DEBUG_OBJECT (wav, "doing seek without event");
flags = 0;
}
@ -751,6 +787,7 @@ gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event)
memcpy (&seeksegment, &wav->segment, sizeof (GstSegment));
if (event) {
GST_DEBUG_OBJECT (wav, "configuring seek");
gst_segment_set_seek (&seeksegment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
@ -947,12 +984,16 @@ gst_wavparse_stream_headers (GstWavParse * wav)
GST_DEBUG_OBJECT (wav, "Finished parsing headers");
duration = gst_util_uint64_scale_int (wav->datasize, GST_SECOND, wav->bps);
GST_DEBUG_OBJECT (wav, "Got duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration));
gst_segment_set_duration (&wav->segment, GST_FORMAT_TIME, duration);
gst_pad_push_event (wav->srcpad,
gst_event_new_new_segment (FALSE, wav->segment.rate,
wav->segment.format, wav->segment.start,
wav->segment.duration, wav->segment.start));
/* now we have all the info to perform a pending seek if any, if no
* event, this will still do the right thing and it will also send
* the right newsegment event downstream. */
gst_wavparse_perform_seek (wav, wav->seek_event);
/* remove pending event */
gst_event_replace (&wav->seek_event, NULL);
return GST_FLOW_OK;
@ -1013,6 +1054,46 @@ header_read_error:
}
}
/* handle an event sent directly to the element.
*
* This event can be sent either in the READY state or the
* >READY state. The only event of interest really is the seek
* event.
*
* In the READY state we can only store the event and try to
* respect it when going to PAUSED. We assume we are in the
* READY state when our parsing state != GST_WAVPARSE_DATA.
*
* When we are steaming, we can simply perform the seek right
* away.
*/
static gboolean
gst_wavparse_send_event (GstElement * element, GstEvent * event)
{
GstWavParse *wav = GST_WAVPARSE (element);
gboolean res = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
if (wav->state == GST_WAVPARSE_DATA) {
/* we can handle the seek directly when streaming data */
res = gst_wavparse_perform_seek (wav, event);
} else {
GST_DEBUG_OBJECT (wav, "queuing seek for later");
gst_event_replace (&wav->seek_event, event);
/* we always return true */
res = TRUE;
}
break;
default:
break;
}
gst_event_unref (event);
return res;
}
#define MAX_BUFFER_SIZE 4096
static GstFlowReturn
@ -1146,6 +1227,7 @@ gst_wavparse_loop (GstPad * pad)
return;
/* ERRORS */
pause:
GST_LOG_OBJECT (wav, "pausing task %d", ret);
gst_pad_pause_task (wav->sinkpad);
@ -1372,6 +1454,10 @@ gst_wavparse_srcpad_event (GstPad * pad, GstEvent * event)
GST_DEBUG_OBJECT (wavparse, "event %d", GST_EVENT_TYPE (event));
/* can only handle events when we are in the data state */
if (wavparse->state != GST_WAVPARSE_DATA)
return FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
@ -1405,7 +1491,6 @@ gst_wavparse_sink_activate_pull (GstPad * sinkpad, gboolean active)
GstWavParse *wav = GST_WAVPARSE (gst_pad_get_parent (sinkpad));
if (active) {
wav->segment_running = TRUE;
gst_pad_start_task (sinkpad, (GstTaskFunction) gst_wavparse_loop, sinkpad);
} else {
gst_pad_stop_task (sinkpad);
@ -1425,7 +1510,7 @@ gst_wavparse_change_state (GstElement * element, GstStateChange transition)
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
wav->state = GST_WAVPARSE_START;
gst_wavparse_reset (wav);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
@ -1440,7 +1525,6 @@ gst_wavparse_change_state (GstElement * element, GstStateChange transition)
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_wavparse_destroy_sourcepad (wav);
gst_wavparse_reset (wav);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;

9
gst/wavparse/gstwavparse.h
View file

@ -48,6 +48,11 @@ typedef enum {
typedef struct _GstWavParse GstWavParse;
typedef struct _GstWavParseClass GstWavParseClass;
/**
* GstWavParse:
*
* Opaque data structure.
*/
struct _GstWavParse {
GstElement parent;
@ -78,10 +83,10 @@ struct _GstWavParse {
guint64 datastart;
guint64 datasize;
/* pending seek */
GstEvent *seek_event;
/* configured segment, start/stop expressed in
* bytes */
/* configured segment, start/stop expressed in time */
GstSegment segment;
gboolean segment_running;
};