/* GStreamer
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
* Copyright (C) 2006 Andy Wingo <wingo@pobox.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-theoraparse
* @short_description: parses theora streams
* @see_also: theoradec, oggdemux, vorbisparse
*
* <refsect2>
* <para>
* The theoraparse element will parse the header packets of the Theora
* stream and put them as the streamheader in the caps. This is used in the
* multifdsink case where you want to stream live theora streams to multiple
* clients, each client has to receive the streamheaders first before they can
* consume the theora packets.
* </para>
* <para>
* This element also makes sure that the buffers that it pushes out are properly
* timestamped and that their offset and offset_end are set. The buffers that
* vorbisparse outputs have all of the metadata that oggmux expects to receive,
* which allows you to (for example) remux an ogg/theora file.
* </para>
* <para>
* In addition, this element allows you to fix badly synchronized streams. You
* pass in an array of (granule time, buffer time) synchronization points via
* the synchronization-points GValueArray property, and this element will adjust
* the granulepos values that it outputs. The adjustment will be made by
* offsetting all buffers that it outputs by a specified amount, and updating
* that offset from the value array whenever a keyframe is processed.
* </para>
* <title>Example pipelines</title>
* <para>
* <programlisting>
* gst-launch -v filesrc location=video.ogg ! oggdemux ! theoraparse ! fakesink
* </programlisting>
* This pipeline shows that the streamheader is set in the caps, and that each
* buffer has the timestamp, duration, offset, and offset_end set.
* </para>
* <para>
* <programlisting>
* gst-launch filesrc location=video.ogg ! oggdemux ! vorbisparse \
* ! oggmux ! filesink location=video-remuxed.ogg
* </programlisting>
* This pipeline shows remuxing. video-remuxed.ogg might not be exactly the same
* as video.ogg, but they should produce exactly the same decoded data.
* </para>
* </refsect2>
*
* Last reviewed on 2006-04-01 (0.10.4.1)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gsttheoraparse.h"
#define GST_CAT_DEFAULT theoraparse_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static GstElementDetails theora_parse_details = {
"Theora video parser",
"Codec/Parser/Video",
"parse raw theora streams",
"Andy Wingo <wingo@pobox.com>"
};
static GstStaticPadTemplate theora_parse_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-theora")
);
static GstStaticPadTemplate theora_parse_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-theora")
);
enum
{
PROP_0,
PROP_SYNCHRONIZATION_POINTS
};
GST_BOILERPLATE (GstTheoraParse, gst_theora_parse, GstElement,
GST_TYPE_ELEMENT);
static void theora_parse_dispose (GObject * object);
static void theora_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void theora_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static gboolean theora_parse_src_query (GstPad * pad, GstQuery * query);
static GstFlowReturn theora_parse_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn theora_parse_change_state (GstElement * element,
GstStateChange transition);
static gboolean theora_parse_sink_event (GstPad * pad, GstEvent * event);
static gboolean theora_parse_src_query (GstPad * pad, GstQuery * query);
static void
gst_theora_parse_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&theora_parse_src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&theora_parse_sink_factory));
gst_element_class_set_details (element_class, &theora_parse_details);
}
static void
gst_theora_parse_class_init (GstTheoraParseClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->dispose = theora_parse_dispose;
gobject_class->get_property = theora_parse_get_property;
gobject_class->set_property = theora_parse_set_property;
/**
* GstTheoraParse:sychronization-points
*
* An array of (granuletime, buffertime) pairs
*
* Since: 0.10.10
*/
g_object_class_install_property (gobject_class, PROP_SYNCHRONIZATION_POINTS,
g_param_spec_value_array ("synchronization-points",
"Synchronization points",
"An array of (granuletime, buffertime) pairs",
g_param_spec_uint64 ("time", "Time",
"Time (either granuletime or buffertime)", 0, G_MAXUINT64, 0,
G_PARAM_READWRITE), (GParamFlags) G_PARAM_READWRITE));
gstelement_class->change_state = theora_parse_change_state;
GST_DEBUG_CATEGORY_INIT (theoraparse_debug, "theoraparse", 0,
"Theora parser");
}
static void
gst_theora_parse_init (GstTheoraParse * parse, GstTheoraParseClass * g_class)
{
parse->sinkpad =
gst_pad_new_from_static_template (&theora_parse_sink_factory, "sink");
gst_pad_set_chain_function (parse->sinkpad, theora_parse_chain);
gst_pad_set_event_function (parse->sinkpad, theora_parse_sink_event);
gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
parse->srcpad =
gst_pad_new_from_static_template (&theora_parse_src_factory, "src");
gst_pad_set_query_function (parse->srcpad, theora_parse_src_query);
gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
}
static void
theora_parse_dispose (GObject * object)
{
GstTheoraParse *parse = GST_THEORA_PARSE (object);
g_free (parse->times);
parse->times = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
theora_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTheoraParse *parse = GST_THEORA_PARSE (object);
switch (prop_id) {
case PROP_SYNCHRONIZATION_POINTS:
{
GValueArray *array;
guint i;
array = g_value_get_boxed (value);
if (array) {
if (array->n_values % 2)
goto odd_values;
g_free (parse->times);
parse->times = g_new (GstClockTime, array->n_values);
parse->npairs = array->n_values / 2;
for (i = 0; i < array->n_values; i++)
parse->times[i] = g_value_get_uint64 (&array->values[i]);
} else {
g_free (parse->times);
parse->npairs = 0;
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
return;
odd_values:
{
g_critical ("expected an even number of time values for "
"synchronization-points");
return;
}
}
static void
theora_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTheoraParse *parse = GST_THEORA_PARSE (object);
switch (prop_id) {
case PROP_SYNCHRONIZATION_POINTS:
{
GValueArray *array = NULL;
guint i;
array = g_value_array_new (parse->npairs * 2);
for (i = 0; i < parse->npairs; i++) {
GValue v = { 0, };
g_value_init (&v, G_TYPE_UINT64);
g_value_set_uint64 (&v, parse->times[i * 2]);
g_value_array_append (array, &v);
g_value_set_uint64 (&v, parse->times[i * 2 + 1]);
g_value_array_append (array, &v);
g_value_unset (&v);
}
g_value_set_boxed (value, array);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
theora_parse_set_header_on_caps (GstTheoraParse * parse, GstCaps * caps)
{
GstBuffer **bufs;
GstStructure *structure;
gint i;
GValue array = { 0 };
GValue value = { 0 };
bufs = parse->streamheader;
structure = gst_caps_get_structure (caps, 0);
g_value_init (&array, GST_TYPE_ARRAY);
for (i = 0; i < 3; i++) {
g_assert (bufs[i]);
bufs[i] = gst_buffer_make_metadata_writable (bufs[i]);
GST_BUFFER_FLAG_SET (bufs[i], GST_BUFFER_FLAG_IN_CAPS);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, bufs[i]);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
}
gst_structure_set_value (structure, "streamheader", &array);
g_value_unset (&array);
}
/* FIXME: copy from libtheora, theora should somehow make this available for seeking */
static int
_theora_ilog (unsigned int v)
{
int ret = 0;
while (v) {
ret++;
v >>= 1;
}
return (ret);
}
/* two tasks to do here: set the streamheader on the caps, and use libtheora to
parse the headers */
static void
theora_parse_set_streamheader (GstTheoraParse * parse)
{
GstCaps *caps;
gint i;
guint32 bitstream_version;
g_assert (!parse->streamheader_received);
caps = gst_caps_make_writable (gst_pad_get_caps (parse->srcpad));
theora_parse_set_header_on_caps (parse, caps);
GST_DEBUG_OBJECT (parse, "here are the caps: %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (parse->srcpad, caps);
gst_caps_unref (caps);
for (i = 0; i < 3; i++) {
ogg_packet packet;
GstBuffer *buf;
buf = parse->streamheader[i];
gst_buffer_set_caps (buf, GST_PAD_CAPS (parse->srcpad));
packet.packet = GST_BUFFER_DATA (buf);
packet.bytes = GST_BUFFER_SIZE (buf);
packet.granulepos = GST_BUFFER_OFFSET_END (buf);
packet.packetno = i + 1;
packet.e_o_s = 0;
theora_decode_header (&parse->info, &parse->comment, &packet);
}
parse->fps_n = parse->info.fps_numerator;
parse->fps_d = parse->info.fps_denominator;
parse->shift = _theora_ilog (parse->info.keyframe_frequency_force - 1);
/* With libtheora-1.0beta1 the granulepos scheme was changed:
* where earlier the granulepos refered to the index/beginning
* of a frame, it now refers to the end, which matches the use
* in vorbis/speex. We check the bitstream version from the header so
* we know which way to interpret the incoming granuepos
*/
bitstream_version = (parse->info.version_major << 16) |
(parse->info.version_minor << 8) | parse->info.version_subminor;
parse->is_old_bitstream = (bitstream_version <= 0x00030200);
parse->streamheader_received = TRUE;
}
static void
theora_parse_drain_event_queue (GstTheoraParse * parse)
{
while (parse->event_queue->length) {
GstEvent *event;
event = GST_EVENT_CAST (g_queue_pop_head (parse->event_queue));
gst_pad_event_default (parse->sinkpad, event);
}
}
static void
theora_parse_push_headers (GstTheoraParse * parse)
{
gint i;
theora_parse_drain_event_queue (parse);
if (!parse->streamheader_received)
theora_parse_set_streamheader (parse);
/* ignore return values, we pass along the result of pushing data packets only
*/
for (i = 0; i < 3; i++)
gst_pad_push (parse->srcpad, gst_buffer_ref (parse->streamheader[i]));
parse->send_streamheader = FALSE;
}
static void
theora_parse_clear_queue (GstTheoraParse * parse)
{
while (parse->buffer_queue->length) {
GstBuffer *buf;
buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue));
gst_buffer_unref (buf);
}
while (parse->event_queue->length) {
GstEvent *event;
event = GST_EVENT_CAST (g_queue_pop_head (parse->event_queue));
gst_buffer_unref (event);
}
}
static gint64
make_granulepos (GstTheoraParse * parse, gint64 keyframe, gint64 frame)
{
if (keyframe == -1)
keyframe = 0;
/* If using newer theora, offset the granulepos by +1, see comment
* in theora_parse_set_streamheader */
if (!parse->is_old_bitstream)
keyframe += 1;
g_return_val_if_fail (frame >= keyframe, -1);
g_return_val_if_fail (frame - keyframe < 1 << parse->shift, -1);
return (keyframe << parse->shift) + (frame - keyframe);
}
static void
parse_granulepos (GstTheoraParse * parse, gint64 granulepos,
gint64 * keyframe, gint64 * frame)
{
gint64 kf;
kf = granulepos >> parse->shift;
/* If using newer theora, offset the granulepos by -1, see comment
* in theora_parse_set_streamheader */
if (!parse->is_old_bitstream)
kf -= 1;
if (keyframe)
*keyframe = kf;
if (frame)
*frame = kf + (granulepos & ((1 << parse->shift) - 1));
}
static gboolean
is_keyframe (GstBuffer * buf)
{
if (!GST_BUFFER_DATA (buf))
return FALSE;
if (!GST_BUFFER_SIZE (buf))
return FALSE;
return ((GST_BUFFER_DATA (buf)[0] & 0x40) == 0);
}
static void
theora_parse_munge_granulepos (GstTheoraParse * parse, GstBuffer * buf,
gint64 keyframe, gint64 frame)
{
gint64 frames_diff;
GstClockTimeDiff time_diff;
if (keyframe == frame) {
gint i;
/* update granule_offset */
for (i = 0; i < parse->npairs; i++) {
if (parse->times[i * 2] >= GST_BUFFER_OFFSET (buf))
break;
}
if (i > 0) {
/* time_diff gets reset below */
time_diff = parse->times[i * 2 - 1] - parse->times[i * 2 - 2];
parse->granule_offset = gst_util_uint64_scale (time_diff,
parse->fps_n, parse->fps_d * GST_SECOND);
parse->granule_offset <<= parse->shift;
}
}
frames_diff = parse->granule_offset >> parse->shift;
time_diff = gst_util_uint64_scale_int (GST_SECOND * frames_diff,
parse->fps_d, parse->fps_n);
GST_DEBUG_OBJECT (parse, "offsetting theora stream by %" G_GINT64_FORMAT
" frames (%" GST_TIME_FORMAT ")", frames_diff, GST_TIME_ARGS (time_diff));
GST_BUFFER_OFFSET_END (buf) += parse->granule_offset;
GST_BUFFER_OFFSET (buf) += time_diff;
GST_BUFFER_TIMESTAMP (buf) += time_diff;
}
static GstFlowReturn
theora_parse_push_buffer (GstTheoraParse * parse, GstBuffer * buf,
gint64 keyframe, gint64 frame)
{
GstClockTime this_time, next_time;
this_time = gst_util_uint64_scale_int (GST_SECOND * frame,
parse->fps_d, parse->fps_n);
next_time = gst_util_uint64_scale_int (GST_SECOND * (frame + 1),
parse->fps_d, parse->fps_n);
GST_BUFFER_OFFSET_END (buf) = make_granulepos (parse, keyframe, frame);
GST_BUFFER_OFFSET (buf) = this_time;
GST_BUFFER_TIMESTAMP (buf) = this_time;
GST_BUFFER_DURATION (buf) = next_time - this_time;
gst_buffer_set_caps (buf, GST_PAD_CAPS (parse->srcpad));
if (parse->times)
theora_parse_munge_granulepos (parse, buf, keyframe, frame);
GST_DEBUG_OBJECT (parse, "pushing buffer with granulepos %" G_GINT64_FORMAT
"|%" G_GINT64_FORMAT, keyframe, frame - keyframe);
return gst_pad_push (parse->srcpad, buf);
}
static GstFlowReturn
theora_parse_drain_queue_prematurely (GstTheoraParse * parse)
{
GstFlowReturn ret = GST_FLOW_OK;
/* got an EOS event, make sure to push out any buffers that were in the queue
* -- won't normally be the case, but this catches the
* didn't-get-a-granulepos-on-the-last-packet case. Assuming a continuous
* stream. */
GST_DEBUG_OBJECT (parse, "got EOS, draining queue");
/* if we get an eos before pushing the streamheaders, drain our events before
* eos */
theora_parse_drain_event_queue (parse);
while (!g_queue_is_empty (parse->buffer_queue)) {
GstBuffer *buf;
buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue));
parse->prev_frame++;
if (is_keyframe (buf))
/* we have a keyframe */
parse->prev_keyframe = parse->prev_frame;
else
GST_BUFFER_FLAGS (buf) |= GST_BUFFER_FLAG_DELTA_UNIT;
if (parse->prev_keyframe < 0) {
if (GST_BUFFER_OFFSET_END_IS_VALID (buf)) {
parse_granulepos (parse, GST_BUFFER_OFFSET_END (buf),
&parse->prev_keyframe, NULL);
} else {
/* No previous keyframe known; can't extract one from this frame. That
* means we can't do any valid output for this frame, just continue to
* the next frame.
*/
gst_buffer_unref (buf);
continue;
}
}
ret = theora_parse_push_buffer (parse, buf, parse->prev_keyframe,
parse->prev_frame);
if (ret != GST_FLOW_OK)
goto done;
}
done:
return ret;
}
static GstFlowReturn
theora_parse_drain_queue (GstTheoraParse * parse, gint64 granulepos)
{
GstFlowReturn ret = GST_FLOW_OK;
gint64 keyframe, prev_frame, frame;
parse_granulepos (parse, granulepos, &keyframe, &frame);
prev_frame = frame - g_queue_get_length (parse->buffer_queue);
if (prev_frame < parse->prev_frame) {
GST_WARNING ("jumped %" G_GINT64_FORMAT
" frames backwards! not sure what to do here",
parse->prev_frame - prev_frame);
ret = GST_FLOW_ERROR;
goto done;
} else if (prev_frame > parse->prev_frame) {
GST_INFO ("discontinuity detected (%" G_GINT64_FORMAT
" frames)", prev_frame - parse->prev_frame);
if (keyframe <= prev_frame && keyframe > parse->prev_keyframe)
parse->prev_keyframe = keyframe;
parse->prev_frame = prev_frame;
}
GST_DEBUG ("draining queue of length %d",
g_queue_get_length (parse->buffer_queue));
while (!g_queue_is_empty (parse->buffer_queue)) {
GstBuffer *buf;
parse->prev_frame++;
g_assert (parse->prev_frame >= 0);
buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue));
if (is_keyframe (buf))
/* we have a keyframe */
parse->prev_keyframe = parse->prev_frame;
else
GST_BUFFER_FLAGS (buf) |= GST_BUFFER_FLAG_DELTA_UNIT;
ret = theora_parse_push_buffer (parse, buf, parse->prev_keyframe,
parse->prev_frame);
if (ret != GST_FLOW_OK)
goto done;
}
done:
return ret;
}
static GstFlowReturn
theora_parse_queue_buffer (GstTheoraParse * parse, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
buf = gst_buffer_make_metadata_writable (buf);
g_queue_push_tail (parse->buffer_queue, buf);
if (GST_BUFFER_OFFSET_END_IS_VALID (buf)) {
if (parse->prev_keyframe < 0) {
parse_granulepos (parse, GST_BUFFER_OFFSET_END (buf),
&parse->prev_keyframe, NULL);
}
ret = theora_parse_drain_queue (parse, GST_BUFFER_OFFSET_END (buf));
}
return ret;
}
static GstFlowReturn
theora_parse_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret;
GstBuffer *buf;
GstTheoraParse *parse;
parse = GST_THEORA_PARSE (gst_pad_get_parent (pad));
buf = GST_BUFFER (buffer);
parse->packetno++;
if (parse->packetno <= 3) {
/* if 1 <= packetno <= 3, it's streamheader,
* so put it on the streamheader list and return */
parse->streamheader[parse->packetno - 1] = buf;
ret = GST_FLOW_OK;
} else {
if (parse->send_streamheader)
theora_parse_push_headers (parse);
ret = theora_parse_queue_buffer (parse, buf);
}
gst_object_unref (parse);
return ret;
}
static gboolean
theora_parse_queue_event (GstTheoraParse * parse, GstEvent * event)
{
g_queue_push_tail (parse->event_queue, event);
return TRUE;
}
static gboolean
theora_parse_sink_event (GstPad * pad, GstEvent * event)
{
gboolean ret;
GstTheoraParse *parse;
parse = GST_THEORA_PARSE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
theora_parse_clear_queue (parse);
parse->prev_keyframe = -1;
parse->prev_frame = -1;
ret = gst_pad_event_default (pad, event);
break;
case GST_EVENT_EOS:
theora_parse_drain_queue_prematurely (parse);
ret = gst_pad_event_default (pad, event);
break;
default:
if (parse->send_streamheader && GST_EVENT_IS_SERIALIZED (event))
ret = theora_parse_queue_event (parse, event);
else
ret = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (parse);
return ret;
}
static gboolean
theora_parse_src_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstTheoraParse *parse;
guint64 scale = 1;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
parse = GST_THEORA_PARSE (gst_pad_get_parent (pad));
/* we need the info part before we can done something */
if (!parse->streamheader_received)
goto no_header;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_value = gst_util_uint64_scale_int (src_value, 2,
parse->info.height * parse->info.width * 3);
break;
case GST_FORMAT_TIME:
/* seems like a rather silly conversion, implement me if you like */
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
scale = 3 * (parse->info.width * parse->info.height) / 2;
case GST_FORMAT_DEFAULT:
*dest_value = scale * gst_util_uint64_scale (src_value,
parse->info.fps_numerator,
parse->info.fps_denominator * GST_SECOND);
break;
default:
GST_DEBUG_OBJECT (parse, "cannot convert to format %s",
gst_format_get_name (*dest_format));
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * parse->info.fps_denominator,
parse->info.fps_numerator);
break;
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale_int (src_value,
3 * parse->info.width * parse->info.height, 2);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
done:
gst_object_unref (parse);
return res;
/* ERRORS */
no_header:
{
GST_DEBUG_OBJECT (parse, "no header yet, cannot convert");
res = FALSE;
goto done;
}
}
static gboolean
theora_parse_src_query (GstPad * pad, GstQuery * query)
{
GstTheoraParse *parse;
gboolean res = FALSE;
parse = GST_THEORA_PARSE (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
gint64 frame, value;
GstFormat my_format, format;
gint64 time;
frame = parse->prev_frame;
GST_LOG_OBJECT (parse,
"query %p: we have current frame: %lld", query, frame);
/* parse format */
gst_query_parse_position (query, &format, NULL);
/* and convert to the final format in two steps with time as the
* intermediate step */
my_format = GST_FORMAT_TIME;
if (!(res =
theora_parse_src_convert (parse->sinkpad, GST_FORMAT_DEFAULT,
frame, &my_format, &time)))
goto error;
/* fixme: handle segments
time = (time - parse->segment.start) + parse->segment.time;
*/
GST_LOG_OBJECT (parse,
"query %p: our time: %" GST_TIME_FORMAT " (conv to %s)",
query, GST_TIME_ARGS (time), gst_format_get_name (format));
if (!(res =
theora_parse_src_convert (pad, my_format, time, &format, &value)))
goto error;
gst_query_set_position (query, format, value);
GST_LOG_OBJECT (parse,
"query %p: we return %lld (format %u)", query, value, format);
break;
}
case GST_QUERY_DURATION:
/* forward to peer for total */
if (!(res = gst_pad_query (GST_PAD_PEER (parse->sinkpad), query)))
goto error;
break;
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
if (!(res =
theora_parse_src_convert (pad, src_fmt, src_val, &dest_fmt,
&dest_val)))
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
done:
gst_object_unref (parse);
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (parse, "query failed");
goto done;
}
}
static GstStateChangeReturn
theora_parse_change_state (GstElement * element, GstStateChange transition)
{
GstTheoraParse *parse = GST_THEORA_PARSE (element);
GstStateChangeReturn ret;
gint i;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
theora_info_init (&parse->info);
theora_comment_init (&parse->comment);
parse->packetno = 0;
parse->send_streamheader = TRUE;
parse->buffer_queue = g_queue_new ();
parse->event_queue = g_queue_new ();
parse->prev_keyframe = -1;
parse->prev_frame = -1;
parse->granule_offset = 0;
break;
default:
break;
}
ret = parent_class->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
theora_info_clear (&parse->info);
theora_comment_clear (&parse->comment);
theora_parse_clear_queue (parse);
g_queue_free (parse->buffer_queue);
g_queue_free (parse->event_queue);
parse->buffer_queue = NULL;
for (i = 0; i < 3; i++) {
if (parse->streamheader[i]) {
gst_buffer_unref (parse->streamheader[i]);
parse->streamheader[i] = NULL;
}
}
parse->streamheader_received = FALSE;
break;
default:
break;
}
return ret;
}