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jpegparse: port to baseparse

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=728356
This commit is contained in:
Thiago Santos 2014-04-21 23:05:48 -03:00 committed by Thiago Santos
parent 05f908bf45
commit 2bfd106ef6
2 changed files with 169 additions and 277 deletions
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440
gst/jpegformat/gstjpegparse.c
View file

@ -78,9 +78,6 @@ GST_DEBUG_CATEGORY_STATIC (jpeg_parse_debug);
struct _GstJpegParsePrivate
{
GstPad *srcpad;
GstAdapter *adapter;
guint last_offset;
guint last_entropy_len;
gboolean last_resync;
@ -90,10 +87,6 @@ struct _GstJpegParsePrivate
gint caps_framerate_numerator;
gint caps_framerate_denominator;
/* a new segment arrived */
gboolean new_segment;
GstSegment segment;
/* the parsed frame size */
guint16 width, height;
@ -120,34 +113,40 @@ struct _GstJpegParsePrivate
GstTagList *tags;
};
static void gst_jpeg_parse_dispose (GObject * object);
static GstFlowReturn gst_jpeg_parse_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_jpeg_parse_sink_setcaps (GstJpegParse * parse,
static GstFlowReturn
gst_jpeg_parse_handle_frame (GstBaseParse * bparse, GstBaseParseFrame * frame,
gint * skipsize);
static gboolean gst_jpeg_parse_set_sink_caps (GstBaseParse * parse,
GstCaps * caps);
static gboolean gst_jpeg_parse_sink_event (GstPad * pad, GstObject * parent,
static gboolean gst_jpeg_parse_sink_event (GstBaseParse * parse,
GstEvent * event);
static GstStateChangeReturn gst_jpeg_parse_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_jpeg_parse_start (GstBaseParse * parse);
static gboolean gst_jpeg_parse_stop (GstBaseParse * parse);
static GstFlowReturn gst_jpeg_parse_pre_push_frame (GstBaseParse * bparse,
GstBaseParseFrame * frame);
#define gst_jpeg_parse_parent_class parent_class
G_DEFINE_TYPE (GstJpegParse, gst_jpeg_parse, GST_TYPE_ELEMENT);
G_DEFINE_TYPE (GstJpegParse, gst_jpeg_parse, GST_TYPE_BASE_PARSE);
static void
gst_jpeg_parse_class_init (GstJpegParseClass * klass)
{
GstBaseParseClass *gstbaseparse_class;
GstElementClass *gstelement_class;
GObjectClass *gobject_class;
gstbaseparse_class = (GstBaseParseClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class = (GObjectClass *) klass;
g_type_class_add_private (gobject_class, sizeof (GstJpegParsePrivate));
gobject_class->dispose = gst_jpeg_parse_dispose;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_jpeg_parse_change_state);
gstbaseparse_class->start = gst_jpeg_parse_start;
gstbaseparse_class->stop = gst_jpeg_parse_stop;
gstbaseparse_class->set_sink_caps = gst_jpeg_parse_set_sink_caps;
gstbaseparse_class->sink_event = gst_jpeg_parse_sink_event;
gstbaseparse_class->handle_frame = gst_jpeg_parse_handle_frame;
gstbaseparse_class->pre_push_frame = gst_jpeg_parse_pre_push_frame;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_jpeg_parse_src_pad_template));
@ -166,48 +165,16 @@ gst_jpeg_parse_class_init (GstJpegParseClass * klass)
static void
gst_jpeg_parse_init (GstJpegParse * parse)
{
GstPad *sinkpad;
parse->priv = G_TYPE_INSTANCE_GET_PRIVATE (parse, GST_TYPE_JPEG_PARSE,
GstJpegParsePrivate);
/* create the sink and src pads */
sinkpad = gst_pad_new_from_static_template (&gst_jpeg_parse_sink_pad_template,
"sink");
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_parse_chain));
gst_pad_set_event_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_parse_sink_event));
gst_element_add_pad (GST_ELEMENT (parse), sinkpad);
parse->priv->srcpad =
gst_pad_new_from_static_template (&gst_jpeg_parse_src_pad_template,
"src");
gst_pad_use_fixed_caps (parse->priv->srcpad);
gst_element_add_pad (GST_ELEMENT (parse), parse->priv->srcpad);
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->adapter = gst_adapter_new ();
}
static void
gst_jpeg_parse_dispose (GObject * object)
{
GstJpegParse *parse = GST_JPEG_PARSE (object);
if (parse->priv->adapter != NULL) {
gst_adapter_clear (parse->priv->adapter);
gst_object_unref (parse->priv->adapter);
parse->priv->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_jpeg_parse_sink_setcaps (GstJpegParse * parse, GstCaps * caps)
gst_jpeg_parse_set_sink_caps (GstBaseParse * bparse, GstCaps * caps)
{
GstJpegParse *parse = GST_JPEG_PARSE_CAST (bparse);
GstStructure *s = gst_caps_get_structure (caps, 0);
const GValue *framerate;
@ -238,25 +205,23 @@ gst_jpeg_parse_sink_setcaps (GstJpegParse * parse, GstCaps * caps)
* Returns: TRUE if the header was found, FALSE if more data is needed.
*/
static gboolean
gst_jpeg_parse_skip_to_jpeg_header (GstJpegParse * parse)
gst_jpeg_parse_skip_to_jpeg_header (GstJpegParse * parse, GstMapInfo * mapinfo,
gint * skipsize)
{
guint available, flush;
gboolean ret = TRUE;
GstByteReader reader;
available = gst_adapter_available (parse->priv->adapter);
if (available < 4)
if (mapinfo->size < 4)
return FALSE;
flush = gst_adapter_masked_scan_uint32 (parse->priv->adapter, 0xffffff00,
0xffd8ff00, 0, available);
if (flush == -1) {
flush = available - 3; /* Last 3 bytes + 1 more may match header. */
gst_byte_reader_init (&reader, mapinfo->data, mapinfo->size);
*skipsize = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffff00,
0xffd8ff00, 0, mapinfo->size);
if (*skipsize == -1) {
*skipsize = mapinfo->size - 3; /* Last 3 bytes + 1 more may match header. */
ret = FALSE;
}
if (flush > 0) {
GST_LOG_OBJECT (parse, "Skipping %u bytes.", flush);
gst_adapter_flush (parse->priv->adapter, flush);
}
return ret;
}
@ -272,17 +237,21 @@ gst_jpeg_parse_parse_tag_has_entropy_segment (guint8 tag)
* otherwise 0 if more data needed,
* if < 0 the absolute value needs to be flushed */
static gint
gst_jpeg_parse_get_image_length (GstJpegParse * parse)
gst_jpeg_parse_get_image_length (GstJpegParse * parse, GstMapInfo * mapinfo)
{
guint size;
gboolean resync;
GstAdapter *adapter = parse->priv->adapter;
gint offset, noffset;
GstByteReader reader;
size = gst_adapter_available (adapter);
size = mapinfo->size;
gst_byte_reader_init (&reader, mapinfo->data, mapinfo->size);
/* TODO could be removed as previous functions already guarantee this to be
* true */
/* we expect at least 4 bytes, first of which start marker */
if (gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0, 4))
if (gst_byte_reader_masked_scan_uint32 (&reader, 0xffff0000, 0xffd80000, 0,
4))
return 0;
GST_DEBUG ("Parsing jpeg image data (%u bytes)", size);
@ -303,8 +272,8 @@ gst_jpeg_parse_get_image_length (GstJpegParse * parse)
guint32 value;
noffset =
gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
offset, size - offset, &value);
gst_byte_reader_masked_scan_uint32_peek (&reader, 0x0000ff00,
0x0000ff00, offset, size - offset, &value);
/* lost sync if 0xff marker not where expected */
if ((resync = (noffset != offset))) {
GST_DEBUG ("Lost sync at 0x%08x, resyncing", offset + 2);
@ -315,8 +284,8 @@ gst_jpeg_parse_get_image_length (GstJpegParse * parse)
while ((noffset >= 0) && ((value & 0xff) == 0xff)) {
noffset++;
noffset =
gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
noffset, size - noffset, &value);
gst_byte_reader_masked_scan_uint32_peek (&reader, 0x0000ff00,
0x0000ff00, noffset, size - noffset, &value);
}
/* enough bytes left for marker? (we need 0xNN after the 0xff) */
if (noffset < 0) {
@ -349,8 +318,8 @@ gst_jpeg_parse_get_image_length (GstJpegParse * parse)
if (offset + 2 + 4 > size)
goto need_more_data;
else
gst_adapter_masked_scan_uint32_peek (adapter, 0x0, 0x0, offset + 2, 4,
&frame_len);
gst_byte_reader_masked_scan_uint32_peek (&reader, 0x0, 0x0, offset + 2,
4, &frame_len);
frame_len = frame_len & 0xffff;
}
GST_DEBUG ("0x%08x: tag %02x, frame_len=%u", offset + 2, value, frame_len);
@ -366,7 +335,7 @@ gst_jpeg_parse_get_image_length (GstJpegParse * parse)
GST_DEBUG ("0x%08x: finding entropy segment length", offset + 2);
noffset = offset + 2 + frame_len + eseglen;
while (1) {
noffset = gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00,
noffset = gst_byte_reader_masked_scan_uint32_peek (&reader, 0x0000ff00,
0x0000ff00, noffset, size - noffset, &value);
if (noffset < 0) {
/* need more data */
@ -388,7 +357,8 @@ gst_jpeg_parse_get_image_length (GstJpegParse * parse)
/* check if we will still be in sync if we interpret
* this as a sync point and skip this frame */
noffset = offset + frame_len + 2;
noffset = gst_adapter_masked_scan_uint32 (adapter, 0x0000ff00, 0x0000ff00,
noffset =
gst_byte_reader_masked_scan_uint32 (&reader, 0x0000ff00, 0x0000ff00,
noffset, 4);
if (noffset < 0) {
/* ignore and continue resyncing until we hit the end
@ -490,32 +460,6 @@ gst_jpeg_parse_sof (GstJpegParse * parse, GstByteReader * reader)
return TRUE;
}
static inline gboolean
gst_jpeg_parse_remove_marker (GstJpegParse * parse,
GstByteReader * reader, guint8 marker, GstBuffer * buffer)
{
guint16 size = 0;
guint pos = gst_byte_reader_get_pos (reader);
GstMapInfo map;
if (!gst_byte_reader_peek_uint16_be (reader, &size))
return FALSE;
if (gst_byte_reader_get_remaining (reader) < size)
return FALSE;
GST_LOG_OBJECT (parse, "unhandled marker %x removing %u bytes", marker, size);
gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
memmove (&map.data[pos], &map.data[pos + size], map.size - (pos + size));
gst_buffer_unmap (buffer, &map);
if (!gst_byte_reader_set_pos (reader, pos - size))
return FALSE;
return TRUE;
}
static inline gboolean
gst_jpeg_parse_skip_marker (GstJpegParse * parse,
GstByteReader * reader, guint8 marker)
@ -679,15 +623,13 @@ gst_jpeg_parse_com (GstJpegParse * parse, GstByteReader * reader)
}
static gboolean
gst_jpeg_parse_read_header (GstJpegParse * parse, GstBuffer * buffer)
gst_jpeg_parse_read_header (GstJpegParse * parse, GstMapInfo * map, gint len)
{
GstByteReader reader;
guint8 marker = 0;
gboolean foundSOF = FALSE;
GstMapInfo map;
gst_buffer_map (buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
gst_byte_reader_init (&reader, map->data, len);
if (!gst_byte_reader_peek_uint8 (&reader, &marker))
goto error;
@ -742,11 +684,8 @@ gst_jpeg_parse_read_header (GstJpegParse * parse, GstBuffer * buffer)
goto done;
default:
if (marker == JPG || (marker >= JPG0 && marker <= JPG13)) {
/* we'd like to remove them from the buffer */
if (!gst_jpeg_parse_remove_marker (parse, &reader, marker, buffer))
goto error;
} else if (marker >= APP0 && marker <= APP15) {
if (marker == JPG || (marker >= JPG0 && marker <= JPG13) ||
(marker >= APP0 && marker <= APP15)) {
if (!gst_jpeg_parse_skip_marker (parse, &reader, marker))
goto error;
} else
@ -757,7 +696,6 @@ gst_jpeg_parse_read_header (GstJpegParse * parse, GstBuffer * buffer)
goto error;
}
done:
gst_buffer_unmap (buffer, &map);
return foundSOF;
@ -767,7 +705,6 @@ error:
GST_WARNING_OBJECT (parse,
"Error parsing image header (need more than %u bytes available)",
gst_byte_reader_get_remaining (&reader));
gst_buffer_unmap (buffer, &map);
return FALSE;
}
unhandled:
@ -775,7 +712,6 @@ unhandled:
GST_WARNING_OBJECT (parse, "unhandled marker %x, leaving", marker);
/* Not SOF or SOI. Must not be a JPEG file (or file pointer
* is placed wrong). In either case, it's an error. */
gst_buffer_unmap (buffer, &map);
return FALSE;
}
}
@ -819,8 +755,8 @@ gst_jpeg_parse_set_new_caps (GstJpegParse * parse, gboolean header_ok)
GST_DEBUG_OBJECT (parse,
"setting downstream caps on %s:%s to %" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (parse->priv->srcpad), caps);
res = gst_pad_set_caps (parse->priv->srcpad, caps);
GST_DEBUG_PAD_NAME (GST_BASE_PARSE_SRC_PAD (parse)), caps);
res = gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps);
gst_caps_unref (caps);
return res;
@ -828,56 +764,10 @@ gst_jpeg_parse_set_new_caps (GstJpegParse * parse, gboolean header_ok)
}
static GstFlowReturn
gst_jpeg_parse_push_buffer (GstJpegParse * parse, guint len)
gst_jpeg_parse_pre_push_frame (GstBaseParse * bparse, GstBaseParseFrame * frame)
{
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
gboolean header_ok;
/* reset the offset (only when we flushed) */
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
outbuf = gst_adapter_take_buffer (parse->priv->adapter, len);
if (outbuf == NULL) {
GST_ELEMENT_ERROR (parse, STREAM, DECODE,
("Failed to take buffer of size %u", len),
("Failed to take buffer of size %u", len));
return GST_FLOW_ERROR;
}
header_ok = gst_jpeg_parse_read_header (parse, outbuf);
if (parse->priv->new_segment == TRUE
|| parse->priv->width != parse->priv->caps_width
|| parse->priv->height != parse->priv->caps_height
|| parse->priv->framerate_numerator !=
parse->priv->caps_framerate_numerator
|| parse->priv->framerate_denominator !=
parse->priv->caps_framerate_denominator) {
if (!gst_jpeg_parse_set_new_caps (parse, header_ok)) {
GST_ELEMENT_ERROR (parse, CORE, NEGOTIATION,
("Can't set caps to the src pad"), ("Can't set caps to the src pad"));
return GST_FLOW_ERROR;
}
gst_pad_push_event (parse->priv->srcpad,
gst_event_new_segment (&parse->priv->segment));
if (parse->priv->tags) {
GST_DEBUG_OBJECT (parse, "Pushing tags: %" GST_PTR_FORMAT,
parse->priv->tags);
gst_pad_push_event (parse->priv->srcpad,
gst_event_new_tag (parse->priv->tags));
parse->priv->tags = NULL;
}
parse->priv->new_segment = FALSE;
parse->priv->caps_width = parse->priv->width;
parse->priv->caps_height = parse->priv->height;
parse->priv->caps_framerate_numerator = parse->priv->framerate_numerator;
parse->priv->caps_framerate_denominator =
parse->priv->framerate_denominator;
}
GstJpegParse *parse = GST_JPEG_PARSE_CAST (bparse);
GstBuffer *outbuf = frame->buffer;
GST_BUFFER_TIMESTAMP (outbuf) = parse->priv->next_ts;
@ -891,98 +781,108 @@ gst_jpeg_parse_push_buffer (GstJpegParse * parse, guint len)
GST_BUFFER_DURATION (outbuf) = parse->priv->duration;
GST_LOG_OBJECT (parse, "pushing buffer (ts=%" GST_TIME_FORMAT ", len=%u)",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), len);
ret = gst_pad_push (parse->priv->srcpad, outbuf);
return ret;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_jpeg_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
gst_jpeg_parse_handle_frame (GstBaseParse * bparse, GstBaseParseFrame * frame,
gint * skipsize)
{
GstJpegParse *parse = GST_JPEG_PARSE (parent);
GstJpegParse *parse = GST_JPEG_PARSE_CAST (bparse);
gint len;
GstClockTime timestamp, duration;
GstFlowReturn ret = GST_FLOW_OK;
GstMapInfo mapinfo;
gboolean header_ok;
timestamp = GST_BUFFER_PTS (buf);
duration = GST_BUFFER_DURATION (buf);
timestamp = GST_BUFFER_PTS (frame->buffer);
duration = GST_BUFFER_DURATION (frame->buffer);
gst_adapter_push (parse->priv->adapter, buf);
while (ret == GST_FLOW_OK && gst_jpeg_parse_skip_to_jpeg_header (parse)) {
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)))
parse->priv->next_ts = timestamp;
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (duration)))
parse->priv->duration = duration;
/* check if we already have a EOI */
len = gst_jpeg_parse_get_image_length (parse);
if (len == 0) {
return GST_FLOW_OK;
} else if (len < 0) {
gst_adapter_flush (parse->priv->adapter, -len);
continue;
}
GST_LOG_OBJECT (parse, "parsed image of size %d", len);
/* now we have enough in the adapter to process a full jpeg image */
ret = gst_jpeg_parse_push_buffer (parse, len);
if (!gst_buffer_map (frame->buffer, &mapinfo, GST_MAP_READ)) {
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (parse, "No further start marker found.");
return ret;
if (!gst_jpeg_parse_skip_to_jpeg_header (parse, &mapinfo, skipsize)) {
gst_buffer_unmap (frame->buffer, &mapinfo);
return GST_FLOW_OK;
}
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)))
parse->priv->next_ts = timestamp;
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (duration)))
parse->priv->duration = duration;
len = gst_jpeg_parse_get_image_length (parse, &mapinfo);
if (len == 0) {
gst_buffer_unmap (frame->buffer, &mapinfo);
return GST_FLOW_OK;
} else if (len < 0) {
*skipsize = -len;
gst_buffer_unmap (frame->buffer, &mapinfo);
return GST_FLOW_OK;
}
/* check if we already have a EOI */
GST_LOG_OBJECT (parse, "parsed image of size %d", len);
/* reset the offset (only when we flushed) */
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
header_ok = gst_jpeg_parse_read_header (parse, &mapinfo, len);
gst_buffer_unmap (frame->buffer, &mapinfo);
if (parse->priv->width != parse->priv->caps_width
|| parse->priv->height != parse->priv->caps_height
|| parse->priv->framerate_numerator !=
parse->priv->caps_framerate_numerator
|| parse->priv->framerate_denominator !=
parse->priv->caps_framerate_denominator) {
if (!gst_jpeg_parse_set_new_caps (parse, header_ok)) {
GST_ELEMENT_ERROR (parse, CORE, NEGOTIATION,
("Can't set caps to the src pad"), ("Can't set caps to the src pad"));
return GST_FLOW_ERROR;
}
if (parse->priv->tags) {
GST_DEBUG_OBJECT (parse, "Pushing tags: %" GST_PTR_FORMAT,
parse->priv->tags);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (parse),
gst_event_new_tag (parse->priv->tags));
parse->priv->tags = NULL;
}
parse->priv->caps_width = parse->priv->width;
parse->priv->caps_height = parse->priv->height;
parse->priv->caps_framerate_numerator = parse->priv->framerate_numerator;
parse->priv->caps_framerate_denominator =
parse->priv->framerate_denominator;
}
return gst_base_parse_finish_frame (bparse, frame, len);
}
static gboolean
gst_jpeg_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
gst_jpeg_parse_sink_event (GstBaseParse * bparse, GstEvent * event)
{
GstJpegParse *parse = GST_JPEG_PARSE (parent);
GstJpegParse *parse = GST_JPEG_PARSE_CAST (bparse);
gboolean res = TRUE;
GST_DEBUG_OBJECT (parse, "event : %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_jpeg_parse_sink_setcaps (parse, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH_STOP:
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->duration = GST_CLOCK_TIME_NONE;
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
parse->priv->last_resync = FALSE;
gst_adapter_clear (parse->priv->adapter);
break;
case GST_EVENT_EOS:{
/* Push the remaining data, even though it's incomplete */
guint available = gst_adapter_available (parse->priv->adapter);
if (available > 0)
gst_jpeg_parse_push_buffer (parse, available);
res = gst_pad_push_event (parse->priv->srcpad, event);
break;
}
case GST_EVENT_SEGMENT:
/* Discard any data in the adapter. There should have been an EOS before
* to flush it. */
gst_adapter_clear (parse->priv->adapter);
gst_event_copy_segment (event, &parse->priv->segment);
gst_event_unref (event);
parse->priv->new_segment = TRUE;
break;
case GST_EVENT_TAG:{
if (!parse->priv->new_segment)
res = gst_pad_event_default (pad, parent, event);
if (gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (parse)))
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (bparse, event);
else {
GstTagList *taglist = NULL;
@ -996,64 +896,54 @@ gst_jpeg_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
break;
}
default:
res = gst_pad_event_default (pad, parent, event);
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (bparse, event);
break;
}
return res;
}
static GstStateChangeReturn
gst_jpeg_parse_change_state (GstElement * element, GstStateChange transition)
static gboolean
gst_jpeg_parse_start (GstBaseParse * bparse)
{
GstStateChangeReturn ret;
GstJpegParse *parse;
parse = GST_JPEG_PARSE (element);
parse = GST_JPEG_PARSE_CAST (bparse);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
parse->priv->has_fps = FALSE;
parse->priv->has_fps = FALSE;
parse->priv->interlaced = FALSE;
parse->priv->width = parse->priv->height = 0;
parse->priv->framerate_numerator = 0;
parse->priv->framerate_denominator = 1;
parse->priv->interlaced = FALSE;
parse->priv->width = parse->priv->height = 0;
parse->priv->framerate_numerator = 0;
parse->priv->framerate_denominator = 1;
parse->priv->caps_framerate_numerator =
parse->priv->caps_framerate_denominator = 0;
parse->priv->caps_width = parse->priv->caps_height = -1;
parse->priv->caps_framerate_numerator =
parse->priv->caps_framerate_denominator = 0;
parse->priv->caps_width = parse->priv->caps_height = -1;
parse->priv->new_segment = FALSE;
gst_segment_init (&parse->priv->segment, GST_FORMAT_UNDEFINED);
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->duration = GST_CLOCK_TIME_NONE;
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->duration = GST_CLOCK_TIME_NONE;
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
parse->priv->last_resync = FALSE;
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
parse->priv->last_resync = FALSE;
parse->priv->tags = NULL;
parse->priv->tags = NULL;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (parse->priv->adapter);
if (parse->priv->tags) {
gst_tag_list_unref (parse->priv->tags);
parse->priv->tags = NULL;
}
break;
default:
break;
}
return ret;
return TRUE;
}
static gboolean
gst_jpeg_parse_stop (GstBaseParse * bparse)
{
GstJpegParse *parse;
parse = GST_JPEG_PARSE_CAST (bparse);
if (parse->priv->tags) {
gst_tag_list_unref (parse->priv->tags);
parse->priv->tags = NULL;
}
return TRUE;
}

6
gst/jpegformat/gstjpegparse.h
View file

@ -25,6 +25,7 @@
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstbaseparse.h>
#include "gstjpegformat.h"
@ -40,18 +41,19 @@ G_BEGIN_DECLS
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JPEG_PARSE))
#define GST_IS_JPEG_PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JPEG_PARSE))
#define GST_JPEG_PARSE_CAST(obj) ((GstJpegParse *)obj)
typedef struct _GstJpegParse GstJpegParse;
typedef struct _GstJpegParsePrivate GstJpegParsePrivate;
typedef struct _GstJpegParseClass GstJpegParseClass;
struct _GstJpegParse {
GstElement element;
GstBaseParse parse;
GstJpegParsePrivate *priv;
};
struct _GstJpegParseClass {
GstElementClass parent_class;
GstBaseParseClass parent_class;
};
GType gst_jpeg_parse_get_type (void);