Commit 7f74c39a authored by Tim-Philipp Müller's avatar Tim-Philipp Müller 🐠
Browse files

gst/wavenc/gstwavenc.*: Set caps on first outgoing buffer, so that it doesn't...

gst/wavenc/gstwavenc.*: Set caps on first outgoing buffer, so that it doesn't error out immediately with a non-negoti...

Original commit message from CVS:
* gst/wavenc/gstwavenc.c: (gst_wavenc_base_init),
(gst_wavenc_class_init), (gst_wavenc_init),
(gst_wavenc_create_header_buf), (gst_wavenc_push_header),
(gst_wavenc_sink_setcaps), (get_id_from_name), (gst_wavenc_event),
(gst_wavenc_chain), (gst_wavenc_change_state):
* gst/wavenc/gstwavenc.h:
Set caps on first outgoing buffer, so that it doesn't error out
immediately with a non-negotiated error (#338716). Rewrite and
clean up a bit; fix setcaps function to parse things properly;
fix sink caps (8bit audio is unsigned and doesn't have depth);
use boilerplate macros; remove unused properties stuff.
parent 9b14d8f3
2006-04-19 Tim-Philipp Müller <tim at centricular dot net>
* gst/wavenc/gstwavenc.c: (gst_wavenc_base_init),
(gst_wavenc_class_init), (gst_wavenc_init),
(gst_wavenc_create_header_buf), (gst_wavenc_push_header),
(gst_wavenc_sink_setcaps), (get_id_from_name), (gst_wavenc_event),
(gst_wavenc_chain), (gst_wavenc_change_state):
* gst/wavenc/gstwavenc.h:
Set caps on first outgoing buffer, so that it doesn't error out
immediately with a non-negotiated error (#338716). Rewrite and
clean up a bit; fix setcaps function to parse things properly;
fix sink caps (8bit audio is unsigned and doesn't have depth);
use boilerplate macros; remove unused properties stuff.
2006-04-18 Tim-Philipp Müller <tim at centricular dot net>
* ext/gdk_pixbuf/gstgdkpixbuf.c:
......
/* -*- mOde: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */
/* GStreamer
/* GStreamer .wav encoder
* Copyright (C) <2002> Iain Holmes <iain@prettypeople.org>
* Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
......@@ -30,12 +31,6 @@
GST_DEBUG_CATEGORY_STATIC (wavenc_debug);
#define GST_CAT_DEFAULT wavenc_debug
static void gst_wavenc_base_init (gpointer g_class);
static void gst_wavenc_class_init (GstWavEncClass * klass);
static void gst_wavenc_init (GstWavEnc * wavenc);
static GstFlowReturn gst_wavenc_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_wavenc_event (GstPad * pad, GstEvent * event);
#define WAVE_FORMAT_PCM 0x0001
struct riff_struct
......@@ -69,21 +64,34 @@ struct wave_header
struct chunk_struct data;
};
static GstElementDetails gst_wavenc_details =
static const GstElementDetails gst_wavenc_details =
GST_ELEMENT_DETAILS ("WAV audio muxer",
"Codec/Muxer/Audio",
"Encode raw audio into WAV",
"Iain Holmes <iain@prettypeople.org>");
/* FIXME: mono doesn't produce correct files it seems, at least mplayer xruns */
/* Max. of two channels, more channels need WAVFORMATEX with
* channel layout, which we do not support yet */
#define SINK_CAPS \
"audio/x-raw-int, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, 2 ], " \
"endianness = (int) LITTLE_ENDIAN, " \
"width = (int) 16, " \
"depth = (int) 16, " \
"signed = (boolean) true" \
"; " \
"audio/x-raw-int, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, 2 ], " \
"width = (int) 8, " \
"signed = (boolean) false"
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) LITTLE_ENDIAN, "
"width = (int) { 8, 16 }, "
"depth = (int) { 8, 16 }, " "signed = (boolean) true")
GST_STATIC_CAPS (SINK_CAPS)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
......@@ -92,72 +100,13 @@ static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_CAPS ("audio/x-wav")
);
enum
{
PROP_0
};
static GstElementClass *parent_class = NULL;
static GType
gst_wavenc_get_type (void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof (GstWavEncClass),
gst_wavenc_base_init,
NULL,
(GClassInitFunc) gst_wavenc_class_init,
NULL,
NULL,
sizeof (GstWavEnc),
0,
(GInstanceInitFunc) gst_wavenc_init
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstWavEnc", &info, 0);
}
return type;
}
static GstStateChangeReturn
gst_wavenc_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstWavEnc *wavenc = GST_WAVENC (element);
ret = parent_class->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
wavenc->setup = FALSE;
wavenc->flush_header = TRUE;
break;
default:
break;
}
return ret;
}
static void
set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstWavEnc *enc;
GST_BOILERPLATE (GstWavEnc, gst_wavenc, GstElement, GST_TYPE_ELEMENT);
enc = GST_WAVENC (object);
switch (prop_id) {
default:
break;
}
}
static GstFlowReturn gst_wavenc_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_wavenc_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn gst_wavenc_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps);
static void
gst_wavenc_base_init (gpointer g_class)
......@@ -170,42 +119,63 @@ gst_wavenc_base_init (gpointer g_class)
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
GST_DEBUG_CATEGORY_INIT (wavenc_debug, "wavenc", 0, "WAV encoder element");
}
static void
gst_wavenc_class_init (GstWavEncClass * klass)
{
GstElementClass *element_class;
GObjectClass *object_class;
element_class = (GstElementClass *) klass;
object_class = (GObjectClass *) klass;
object_class->set_property = set_property;
element_class->change_state = gst_wavenc_change_state;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_wavenc_change_state);
}
parent_class = g_type_class_peek_parent (klass);
static void
gst_wavenc_init (GstWavEnc * wavenc, GstWavEncClass * klass)
{
wavenc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_chain_function (wavenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavenc_chain));
gst_pad_set_event_function (wavenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavenc_event));
gst_pad_set_setcaps_function (wavenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavenc_sink_setcaps));
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->sinkpad);
GST_DEBUG_CATEGORY_INIT (wavenc_debug, "wavenc", 0, "WAV encoder element");
wavenc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_use_fixed_caps (wavenc->srcpad);
gst_pad_set_caps (wavenc->srcpad,
gst_static_pad_template_get_caps (&src_factory));
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
}
static gboolean
gst_wavenc_setup (GstWavEnc * wavenc)
#define WAV_HEADER_LEN 44
/* FIXME: we are probably not handling depth != width correctly here */
static GstBuffer *
gst_wavenc_create_header_buf (GstWavEnc * wavenc, guint audio_data_size)
{
struct wave_header wave;
gint size = 0x7fffffff; /* Use a bogus size initially */
GstBuffer *buf;
guint8 *header;
buf = gst_buffer_new_and_alloc (WAV_HEADER_LEN);
header = GST_BUFFER_DATA (buf);
memset (header, 0, WAV_HEADER_LEN);
wave.common.wChannels = wavenc->channels;
wave.common.wBitsPerSample = wavenc->bits;
wave.common.wBitsPerSample = wavenc->depth;
wave.common.dwSamplesPerSec = wavenc->rate;
memset (wavenc->header, 0, WAV_HEADER_LEN);
/* Fill out our wav-header with some information */
strncpy ((char *) wave.riff.id, "RIFF", 4);
wave.riff.len = size - 8;
strncpy ((char *) wave.riff.wav_id, "WAVE", 4);
memcpy (wave.riff.id, "RIFF", 4);
wave.riff.len = audio_data_size + WAV_HEADER_LEN - 8;
memcpy (wave.riff.wav_id, "WAVE", 4);
strncpy ((char *) wave.format.id, "fmt ", 4);
memcpy (wave.format.id, "fmt ", 4);
wave.format.len = 16;
wave.common.wFormatTag = WAVE_FORMAT_PCM;
......@@ -215,147 +185,124 @@ gst_wavenc_setup (GstWavEnc * wavenc)
wave.common.wBlockAlign =
wave.common.wChannels * (wave.common.wBitsPerSample >> 3);
strncpy ((char *) wave.data.id, "data", 4);
wave.data.len = size - 44;
strncpy ((char *) wavenc->header, (char *) wave.riff.id, 4);
GST_WRITE_UINT32_LE (wavenc->header + 4, wave.riff.len);
strncpy ((char *) wavenc->header + 8, (char *) wave.riff.wav_id, 4);
strncpy ((char *) wavenc->header + 12, (char *) wave.format.id, 4);
GST_WRITE_UINT32_LE (wavenc->header + 16, wave.format.len);
GST_WRITE_UINT16_LE (wavenc->header + 20, wave.common.wFormatTag);
GST_WRITE_UINT16_LE (wavenc->header + 22, wave.common.wChannels);
GST_WRITE_UINT32_LE (wavenc->header + 24, wave.common.dwSamplesPerSec);
GST_WRITE_UINT32_LE (wavenc->header + 28, wave.common.dwAvgBytesPerSec);
GST_WRITE_UINT16_LE (wavenc->header + 32, wave.common.wBlockAlign);
GST_WRITE_UINT16_LE (wavenc->header + 34, wave.common.wBitsPerSample);
strncpy ((char *) wavenc->header + 36, (char *) wave.data.id, 4);
GST_WRITE_UINT32_LE (wavenc->header + 40, wave.data.len);
wavenc->length = 0;
wavenc->setup = TRUE;
return TRUE;
memcpy (wave.data.id, "data", 4);
wave.data.len = audio_data_size;
memcpy (header, (char *) wave.riff.id, 4);
GST_WRITE_UINT32_LE (header + 4, wave.riff.len);
memcpy (header + 8, (char *) wave.riff.wav_id, 4);
memcpy (header + 12, (char *) wave.format.id, 4);
GST_WRITE_UINT32_LE (header + 16, wave.format.len);
GST_WRITE_UINT16_LE (header + 20, wave.common.wFormatTag);
GST_WRITE_UINT16_LE (header + 22, wave.common.wChannels);
GST_WRITE_UINT32_LE (header + 24, wave.common.dwSamplesPerSec);
GST_WRITE_UINT32_LE (header + 28, wave.common.dwAvgBytesPerSec);
GST_WRITE_UINT16_LE (header + 32, wave.common.wBlockAlign);
GST_WRITE_UINT16_LE (header + 34, wave.common.wBitsPerSample);
memcpy (header + 36, (char *) wave.data.id, 4);
GST_WRITE_UINT32_LE (header + 40, wave.data.len);
gst_buffer_set_caps (buf, GST_PAD_CAPS (wavenc->srcpad));
return buf;
}
static gboolean
gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
static GstFlowReturn
gst_wavenc_push_header (GstWavEnc * wavenc, guint audio_data_size)
{
GstWavEnc *wavenc;
GstStructure *structure;
GstFlowReturn ret;
GstBuffer *outbuf;
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
wavenc->setup = FALSE;
/* seek to beginning of file */
gst_pad_push_event (wavenc->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
0, GST_CLOCK_TIME_NONE, 0));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "channels", (gint *) & wavenc->channels);
gst_structure_get_int (structure, "rate", (gint *) & wavenc->rate);
gst_structure_get_int (structure, "depth", (gint *) & wavenc->bits);
GST_DEBUG_OBJECT (wavenc, "writing header with datasize=%u", audio_data_size);
gst_wavenc_setup (wavenc);
outbuf = gst_wavenc_create_header_buf (wavenc, audio_data_size);
GST_BUFFER_OFFSET (outbuf) = 0;
if (wavenc->setup) {
gst_object_unref (wavenc);
return TRUE;
}
ret = gst_pad_push (wavenc->srcpad, outbuf);
gst_object_unref (wavenc);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "push header failed: flow = %s",
gst_flow_get_name (ret));
}
return FALSE;
return ret;
}
static void
gst_wavenc_stop_file (GstWavEnc * wavenc)
static gboolean
gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstEvent *event;
GstBuffer *outbuf;
GstWavEnc *wavenc;
GstStructure *structure;
gint chans, rate, width, depth;
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
0, GST_CLOCK_TIME_NONE, 0);
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
gst_pad_push_event (wavenc->srcpad, event);
if (wavenc->sent_header) {
GST_WARNING_OBJECT (wavenc, "cannot change format in middle of stream");
goto fail;
}
outbuf = gst_buffer_new_and_alloc (WAV_HEADER_LEN);
GST_WRITE_UINT32_LE (wavenc->header + 4,
wavenc->length + (WAV_HEADER_LEN - 8));
GST_WRITE_UINT32_LE (wavenc->header + 40, wavenc->length);
memcpy (GST_BUFFER_DATA (outbuf), wavenc->header, WAV_HEADER_LEN);
GST_BUFFER_OFFSET (outbuf) = 0;
GST_BUFFER_OFFSET_END (outbuf) = WAV_HEADER_LEN;
GST_BUFFER_TIMESTAMP (outbuf) = 0;
GST_DEBUG_OBJECT (wavenc, "got caps: %" GST_PTR_FORMAT, caps);
if ((gst_pad_push (wavenc->srcpad, outbuf)) != GST_FLOW_OK)
GST_WARNING_OBJECT (wavenc, "couldn't push header....");
}
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "channels", &chans) ||
!gst_structure_get_int (structure, "rate", &rate) ||
!gst_structure_get_int (structure, "width", &width) ||
(width != 8 && !gst_structure_get_int (structure, "depth", &depth))) {
GST_WARNING_OBJECT (wavenc, "caps incomplete");
goto fail;
}
static void
gst_wavenc_init (GstWavEnc * wavenc)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (wavenc);
wavenc->channels = chans;
wavenc->width = width;
wavenc->depth = (width == 8) ? 8 : depth;
wavenc->rate = rate;
wavenc->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->sinkpad);
gst_pad_set_chain_function (wavenc->sinkpad, gst_wavenc_chain);
gst_pad_set_event_function (wavenc->sinkpad, gst_wavenc_event);
gst_pad_set_setcaps_function (wavenc->sinkpad, gst_wavenc_sink_setcaps);
GST_LOG_OBJECT (wavenc, "accepted caps: chans=%u width=%u depth=%u rate=%u",
wavenc->channels, wavenc->width, wavenc->depth, wavenc->rate);
wavenc->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
gst_object_unref (wavenc);
return TRUE;
wavenc->setup = FALSE;
wavenc->flush_header = TRUE;
wavenc->newmediacount = 0;
fail:
gst_object_unref (wavenc);
return FALSE;
}
struct _maps
#if 0
static struct _maps
{
guint32 id;
char *name;
}
maps[] = {
const guint32 id;
const gchar *name;
} maps[] = {
{
GST_RIFF_INFO_IARL, "Location"}
, {
GST_RIFF_INFO_IART, "Artist"}
, {
GST_RIFF_INFO_ICMS, "Commissioner"}
, {
GST_RIFF_INFO_ICMT, "Comment"}
, {
GST_RIFF_INFO_ICOP, "Copyright"}
, {
GST_RIFF_INFO_ICRD, "Creation Date"}
, {
GST_RIFF_INFO_IENG, "Engineer"}
, {
GST_RIFF_INFO_IGNR, "Genre"}
, {
GST_RIFF_INFO_IKEY, "Keywords"}
, {
GST_RIFF_INFO_INAM, "Title"}
, /* Name */
{
GST_RIFF_INFO_IPRD, "Product"}
, {
GST_RIFF_INFO_ISBJ, "Subject"}
, {
GST_RIFF_INFO_ISFT, "Software"}
, {
GST_RIFF_INFO_IARL, "Location"}, {
GST_RIFF_INFO_IART, "Artist"}, {
GST_RIFF_INFO_ICMS, "Commissioner"}, {
GST_RIFF_INFO_ICMT, "Comment"}, {
GST_RIFF_INFO_ICOP, "Copyright"}, {
GST_RIFF_INFO_ICRD, "Creation Date"}, {
GST_RIFF_INFO_IENG, "Engineer"}, {
GST_RIFF_INFO_IGNR, "Genre"}, {
GST_RIFF_INFO_IKEY, "Keywords"}, {
GST_RIFF_INFO_INAM, "Title"}, {
GST_RIFF_INFO_IPRD, "Product"}, {
GST_RIFF_INFO_ISBJ, "Subject"}, {
GST_RIFF_INFO_ISFT, "Software"}, {
GST_RIFF_INFO_ITCH, "Technician"}
, {
0, NULL}
};
#if 0
static guint32
get_id_from_name (const char *name)
{
int i;
for (i = 0; maps[i].name; i++) {
for (i = 0; i < G_N_ELEMENTS (maps); i++) {
if (strcasecmp (maps[i].name, name) == 0) {
return maps[i].id;
}
......@@ -616,9 +563,8 @@ gst_wavenc_event (GstPad * pad, GstEvent * event)
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
wavenc->pad_eos = TRUE;
case GST_EVENT_EOS:{
GST_DEBUG_OBJECT (wavenc, "got EOS");
#if 0
/* Write our metadata if we have any */
if (wavenc->metadata) {
......@@ -627,25 +573,23 @@ gst_wavenc_event (GstPad * pad, GstEvent * event)
write_labels (wavenc);
}
#endif
/* write header with correct length values */
gst_wavenc_push_header (wavenc, wavenc->length);
gst_wavenc_stop_file (wavenc);
/* and forward the EOS event */
res = gst_pad_event_default (pad, event);
break;
}
case GST_EVENT_NEWSEGMENT:
if (wavenc->newmediacount++ > 0) {
gst_wavenc_stop_file (wavenc);
wavenc->setup = FALSE;
wavenc->flush_header = TRUE;
gst_wavenc_setup (wavenc);
}
/* Just drop it, it's probably in TIME format
* anyway. We'll send our own newsegment event */
gst_event_unref (event);
break;
default:
res = gst_pad_event_default (pad, event);
break;
}
/* and forward it */
res = gst_pad_event_default (pad, event);
gst_object_unref (wavenc);
return res;
}
......@@ -653,48 +597,62 @@ gst_wavenc_event (GstPad * pad, GstEvent * event)
static GstFlowReturn
gst_wavenc_chain (GstPad * pad, GstBuffer * buf)
{
GstWavEnc *wavenc;
GstFlowReturn result = GST_FLOW_OK;
GstWavEnc *wavenc = GST_WAVENC (GST_PAD_PARENT (pad));
GstFlowReturn flow = GST_FLOW_OK;
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
g_return_val_if_fail (wavenc->channels > 0, GST_FLOW_WRONG_STATE);
if (!wavenc->setup) {
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (wavenc, CORE, NEGOTIATION, (NULL),
("encoder not initialised (input is not audio?)"));
result = GST_FLOW_ERROR;
goto beach;
}
if (!wavenc->sent_header) {
/* use bogus size initially, we'll write the real
* header when we get EOS and know the exact length */
flow = gst_wavenc_push_header (wavenc, 0x7FFF0000);
if (wavenc->flush_header) {
GstBuffer *outbuf;
result =
gst_pad_alloc_buffer_and_set_caps (wavenc->srcpad,
GST_BUFFER_OFFSET_NONE, WAV_HEADER_LEN, GST_PAD_CAPS (wavenc->srcpad),
&outbuf);
if (result != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "failed when allocating a %d bytes buffer "
"for headers", WAV_HEADER_LEN);
goto beach;
}
memcpy (GST_BUFFER_DATA (outbuf), wavenc->header, WAV_HEADER_LEN);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
if (flow != GST_FLOW_OK)
return flow;
result = gst_pad_push (wavenc->srcpad, outbuf);
if (result != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "failed when pushing header buffer");
goto beach;
}
wavenc->flush_header = FALSE;
GST_DEBUG_OBJECT (wavenc, "wrote dummy header");
wavenc->sent_header = TRUE;
}
wavenc->length += GST_BUFFER_SIZE (buf);
result = gst_pad_push (wavenc->srcpad, buf);
beach:
gst_object_unref (wavenc);
return result;
GST_LOG_OBJECT (wavenc, "pushing %u bytes raw audio, ts=%" GST_TIME_FORMAT,
GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
buf = gst_buffer_make_metadata_writable (buf);
gst_buffer_set_caps (buf, GST_PAD_CAPS (wavenc->srcpad));
GST_BUFFER_OFFSET (buf) = WAV_HEADER_LEN + wavenc->length;
GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
flow = gst_pad_push (wavenc->srcpad, buf);
return flow;
}
static GstStateChangeReturn
gst_wavenc_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstWavEnc *wavenc = GST_WAVENC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
wavenc->channels = 0;
wavenc->width = 0;
wavenc->depth = 0;
wavenc->rate = 0;
wavenc->length = 0;
wavenc->sent_header = FALSE;
break;
default:
break;
}
ret = parent_class->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;