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gstreamer/ext/theora/gsttheoradec.c
Wim Taymans de7148a942 theoradec: deactivate pool on negotiation 
Deactivate the old bufferpool when we negotiate a new one.
2012-04-02 12:48:45 +02:00

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/* GStreamer
* Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* 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-theoradec
* @see_also: theoraenc, oggdemux
*
* This element decodes theora streams into raw video
* <ulink url="http://www.theora.org/">Theora</ulink> is a royalty-free
* video codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
* Foundation</ulink>, based on the VP3 codec.
*
* <refsect2>
* <title>Example pipeline</title>
* |[
* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! xvimagesink
* ]| This example pipeline will decode an ogg stream and decodes the theora video. Refer to
* the theoraenc example to create the ogg file.
* </refsect2>
*
* Last reviewed on 2006-03-01 (0.10.4)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gsttheoradec.h"
#include <gst/tag/tag.h>
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.h>
#define GST_CAT_DEFAULT theoradec_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
#define THEORA_DEF_TELEMETRY_MV 0
#define THEORA_DEF_TELEMETRY_MBMODE 0
#define THEORA_DEF_TELEMETRY_QI 0
#define THEORA_DEF_TELEMETRY_BITS 0
enum
{
PROP_0,
PROP_TELEMETRY_MV,
PROP_TELEMETRY_MBMODE,
PROP_TELEMETRY_QI,
PROP_TELEMETRY_BITS
};
static GstStaticPadTemplate theora_dec_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw, "
"format = (string) { I420, Y42B, Y444 }, "
"framerate = (fraction) [0/1, MAX], "
"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
);
static GstStaticPadTemplate theora_dec_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-theora")
);
#define gst_theora_dec_parent_class parent_class
G_DEFINE_TYPE (GstTheoraDec, gst_theora_dec, GST_TYPE_ELEMENT);
static void theora_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void theora_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static gboolean theora_dec_setcaps (GstTheoraDec * dec, GstCaps * caps);
static gboolean theora_dec_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstFlowReturn theora_dec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static GstStateChangeReturn theora_dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean theora_dec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean theora_dec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean theora_dec_src_convert (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
#if 0
static const GstFormat *theora_get_formats (GstPad * pad);
#endif
#if 0
static const GstEventMask *theora_get_event_masks (GstPad * pad);
#endif
static gboolean
gst_theora_dec_ctl_is_supported (int req)
{
/* should return TH_EFAULT or TH_EINVAL if supported, and TH_EIMPL if not */
return (th_decode_ctl (NULL, req, NULL, 0) != TH_EIMPL);
}
static void
gst_theora_dec_class_init (GstTheoraDecClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = theora_dec_set_property;
gobject_class->get_property = theora_dec_get_property;
if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_MV)) {
g_object_class_install_property (gobject_class, PROP_TELEMETRY_MV,
g_param_spec_int ("visualize-motion-vectors",
"Visualize motion vectors",
"Show motion vector selection overlaid on image. "
"Value gives a mask for motion vector (MV) modes to show",
0, 0xffff, THEORA_DEF_TELEMETRY_MV,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_MBMODE)) {
g_object_class_install_property (gobject_class, PROP_TELEMETRY_MBMODE,
g_param_spec_int ("visualize-macroblock-modes",
"Visualize macroblock modes",
"Show macroblock mode selection overlaid on image. "
"Value gives a mask for macroblock (MB) modes to show",
0, 0xffff, THEORA_DEF_TELEMETRY_MBMODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_QI)) {
g_object_class_install_property (gobject_class, PROP_TELEMETRY_QI,
g_param_spec_int ("visualize-quantization-modes",
"Visualize adaptive quantization modes",
"Show adaptive quantization mode selection overlaid on image. "
"Value gives a mask for quantization (QI) modes to show",
0, 0xffff, THEORA_DEF_TELEMETRY_QI,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_BITS)) {
/* FIXME: make this a boolean instead? The value scales the bars so
* they're less wide. Default is to use full width, and anything else
* doesn't seem particularly useful, since the smaller bars just disappear
* then (they almost disappear for a value of 2 already). */
g_object_class_install_property (gobject_class, PROP_TELEMETRY_BITS,
g_param_spec_int ("visualize-bit-usage",
"Visualize bitstream usage breakdown",
"Sets the bitstream breakdown visualization mode. "
"Values influence the width of the bit usage bars to show",
0, 0xff, THEORA_DEF_TELEMETRY_BITS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&theora_dec_src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&theora_dec_sink_factory));
gst_element_class_set_details_simple (gstelement_class,
"Theora video decoder", "Codec/Decoder/Video",
"decode raw theora streams to raw YUV video",
"Benjamin Otte <otte@gnome.org>, Wim Taymans <wim@fluendo.com>");
gstelement_class->change_state = theora_dec_change_state;
GST_DEBUG_CATEGORY_INIT (theoradec_debug, "theoradec", 0, "Theora decoder");
}
static void
gst_theora_dec_init (GstTheoraDec * dec)
{
dec->sinkpad =
gst_pad_new_from_static_template (&theora_dec_sink_factory, "sink");
gst_pad_set_event_function (dec->sinkpad, theora_dec_sink_event);
gst_pad_set_chain_function (dec->sinkpad, theora_dec_chain);
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
dec->srcpad =
gst_pad_new_from_static_template (&theora_dec_src_factory, "src");
gst_pad_set_event_function (dec->srcpad, theora_dec_src_event);
gst_pad_set_query_function (dec->srcpad, theora_dec_src_query);
gst_pad_use_fixed_caps (dec->srcpad);
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
dec->telemetry_mv = THEORA_DEF_TELEMETRY_MV;
dec->telemetry_mbmode = THEORA_DEF_TELEMETRY_MBMODE;
dec->telemetry_qi = THEORA_DEF_TELEMETRY_QI;
dec->telemetry_bits = THEORA_DEF_TELEMETRY_BITS;
dec->gather = NULL;
dec->decode = NULL;
dec->queued = NULL;
dec->pendingevents = NULL;
}
static void
gst_theora_dec_reset (GstTheoraDec * dec)
{
dec->need_keyframe = TRUE;
dec->last_timestamp = -1;
dec->discont = TRUE;
dec->frame_nr = -1;
dec->seqnum = gst_util_seqnum_next ();
dec->dropped = 0;
dec->processed = 0;
gst_segment_init (&dec->segment, GST_FORMAT_TIME);
GST_OBJECT_LOCK (dec);
dec->proportion = 1.0;
dec->earliest_time = -1;
GST_OBJECT_UNLOCK (dec);
g_list_foreach (dec->queued, (GFunc) gst_mini_object_unref, NULL);
g_list_free (dec->queued);
dec->queued = NULL;
g_list_foreach (dec->gather, (GFunc) gst_mini_object_unref, NULL);
g_list_free (dec->gather);
dec->gather = NULL;
g_list_foreach (dec->decode, (GFunc) gst_mini_object_unref, NULL);
g_list_free (dec->decode);
dec->decode = NULL;
g_list_foreach (dec->pendingevents, (GFunc) gst_mini_object_unref, NULL);
g_list_free (dec->pendingevents);
dec->pendingevents = NULL;
if (dec->tags) {
gst_tag_list_free (dec->tags);
dec->tags = NULL;
}
}
#if 0
static const GstFormat *
theora_get_formats (GstPad * pad)
{
static GstFormat src_formats[] = {
GST_FORMAT_DEFAULT, /* frames in this case */
GST_FORMAT_TIME,
GST_FORMAT_BYTES,
0
};
static GstFormat sink_formats[] = {
GST_FORMAT_DEFAULT,
GST_FORMAT_TIME,
0
};
return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}
#endif
#if 0
static const GstEventMask *
theora_get_event_masks (GstPad * pad)
{
static const GstEventMask theora_src_event_masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
{0,}
};
return theora_src_event_masks;
}
#endif
static gboolean
theora_dec_src_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstTheoraDec *dec;
guint64 scale = 1;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
/* we need the info part before we can done something */
if (!dec->have_header)
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, 8,
dec->info.pic_height * dec->info.pic_width * dec->output_bpp);
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 =
dec->output_bpp * (dec->info.pic_width * dec->info.pic_height) /
8;
case GST_FORMAT_DEFAULT:
*dest_value = scale * gst_util_uint64_scale (src_value,
dec->info.fps_numerator, dec->info.fps_denominator * GST_SECOND);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * dec->info.fps_denominator, dec->info.fps_numerator);
break;
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale_int (src_value,
dec->output_bpp * dec->info.pic_width * dec->info.pic_height, 8);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
done:
gst_object_unref (dec);
return res;
/* ERRORS */
no_header:
{
GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
res = FALSE;
goto done;
}
}
#if 0
static gboolean
theora_dec_sink_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstTheoraDec *dec;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
/* we need the info part before we can done something */
if (!dec->have_header)
goto no_header;
switch (src_format) {
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = _theora_granule_start_time (dec, src_value);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
{
guint rest;
/* framecount */
*dest_value = gst_util_uint64_scale (src_value,
dec->info.fps_numerator, GST_SECOND * dec->info.fps_denominator);
/* funny way of calculating granulepos in theora */
rest = *dest_value / dec->info.keyframe_granule_shift;
*dest_value -= rest;
*dest_value <<= dec->granule_shift;
*dest_value += rest;
break;
}
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
}
done:
gst_object_unref (dec);
return res;
/* ERRORS */
no_header:
{
GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
res = FALSE;
goto done;
}
}
#endif
static gboolean
theora_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstTheoraDec *dec;
gboolean res = FALSE;
dec = GST_THEORA_DEC (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
gint64 value;
GstFormat format;
gint64 time;
/* parse format */
gst_query_parse_position (query, &format, NULL);
time = dec->last_timestamp;
time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time);
GST_LOG_OBJECT (dec,
"query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));
if (!(res =
theora_dec_src_convert (pad, GST_FORMAT_TIME, time, &format,
&value)))
goto error;
gst_query_set_position (query, format, value);
GST_LOG_OBJECT (dec,
"query %p: we return %" G_GINT64_FORMAT " (format %u)", query, value,
format);
break;
}
case GST_QUERY_DURATION:
{
/* forward to peer for total */
res = gst_pad_peer_query (dec->sinkpad, query);
if (!res)
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_dec_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, parent, query);
break;
}
done:
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (dec, "query failed");
goto done;
}
}
static gboolean
theora_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res = TRUE;
GstTheoraDec *dec;
dec = GST_THEORA_DEC (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
GstFormat format, tformat;
gdouble rate;
GstEvent *real_seek;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gint64 tcur, tstop;
guint32 seqnum;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
seqnum = gst_event_get_seqnum (event);
gst_event_unref (event);
/* we have to ask our peer to seek to time here as we know
* nothing about how to generate a granulepos from the src
* formats or anything.
*
* First bring the requested format to time
*/
tformat = GST_FORMAT_TIME;
if (!(res = theora_dec_src_convert (pad, format, cur, &tformat, &tcur)))
goto convert_error;
if (!(res = theora_dec_src_convert (pad, format, stop, &tformat, &tstop)))
goto convert_error;
/* then seek with time on the peer */
real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
flags, cur_type, tcur, stop_type, tstop);
gst_event_set_seqnum (real_seek, seqnum);
res = gst_pad_push_event (dec->sinkpad, real_seek);
break;
}
case GST_EVENT_QOS:
{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, NULL, &proportion, &diff, &timestamp);
/* we cannot randomly skip frame decoding since we don't have
* B frames. we can however use the timestamp and diff to not
* push late frames. This would at least save us the time to
* crop/memcpy the data. */
GST_OBJECT_LOCK (dec);
dec->proportion = proportion;
dec->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (dec);
GST_DEBUG_OBJECT (dec, "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT,
GST_TIME_ARGS (timestamp), diff);
res = gst_pad_push_event (dec->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (dec->sinkpad, event);
break;
}
done:
return res;
/* ERRORS */
convert_error:
{
GST_DEBUG_OBJECT (dec, "could not convert format");
goto done;
}
}
static gboolean
theora_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean ret = FALSE;
GstTheoraDec *dec;
dec = GST_THEORA_DEC (parent);
GST_LOG_OBJECT (dec, "handling event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
ret = gst_pad_push_event (dec->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_theora_dec_reset (dec);
ret = gst_pad_push_event (dec->srcpad, event);
break;
case GST_EVENT_EOS:
ret = gst_pad_push_event (dec->srcpad, event);
break;
case GST_EVENT_SEGMENT:
{
const GstSegment *segment;
gst_event_parse_segment (event, &segment);
/* we need TIME format */
if (segment->format != GST_FORMAT_TIME)
goto newseg_wrong_format;
GST_DEBUG_OBJECT (dec, "segment: %" GST_SEGMENT_FORMAT, segment);
/* now configure the values */
gst_segment_copy_into (segment, &dec->segment);
dec->seqnum = gst_event_get_seqnum (event);
/* We don't forward this unless/until the decoder is initialised */
if (dec->have_header) {
ret = gst_pad_push_event (dec->srcpad, event);
} else {
dec->pendingevents = g_list_append (dec->pendingevents, event);
ret = TRUE;
}
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = theora_dec_setcaps (dec, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_TAG:
{
if (dec->have_header)
/* and forward */
ret = gst_pad_push_event (dec->srcpad, event);
else {
/* store it to send once we're initialized */
dec->pendingevents = g_list_append (dec->pendingevents, event);
ret = TRUE;
}
break;
}
default:
ret = gst_pad_event_default (pad, parent, event);
break;
}
done:
return ret;
/* ERRORS */
newseg_wrong_format:
{
GST_DEBUG_OBJECT (dec, "received non TIME newsegment");
gst_event_unref (event);
goto done;
}
}
static gboolean
theora_dec_setcaps (GstTheoraDec * dec, GstCaps * caps)
{
GstStructure *s;
const GValue *codec_data;
s = gst_caps_get_structure (caps, 0);
/* parse the par, this overrides the encoded par */
dec->have_par = gst_structure_get_fraction (s, "pixel-aspect-ratio",
&dec->par_num, &dec->par_den);
if ((codec_data = gst_structure_get_value (s, "codec_data"))) {
if (G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
GstBuffer *buffer;
GstMapInfo map;
guint8 *ptr;
gsize left;
guint offset;
buffer = gst_value_get_buffer (codec_data);
offset = 0;
gst_buffer_map (buffer, &map, GST_MAP_READ);
ptr = map.data;
left = map.size;
while (left > 2) {
guint psize;
GstBuffer *buf;
psize = (ptr[0] << 8) | ptr[1];
/* skip header */
ptr += 2;
left -= 2;
offset += 2;
/* make sure we don't read too much */
psize = MIN (psize, left);
buf =
gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, offset, psize);
/* first buffer is a discont buffer */
if (offset == 2)
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
/* now feed it to the decoder we can ignore the error */
theora_dec_chain (dec->sinkpad, GST_OBJECT_CAST (dec), buf);
/* skip the data */
left -= psize;
ptr += psize;
offset += psize;
}
gst_buffer_unmap (buffer, &map);
}
}
return TRUE;
}
static GstFlowReturn
theora_handle_comment_packet (GstTheoraDec * dec, ogg_packet * packet)
{
gchar *encoder = NULL;
GstTagList *list;
GST_DEBUG_OBJECT (dec, "parsing comment packet");
list =
gst_tag_list_from_vorbiscomment (packet->packet, packet->bytes,
(guint8 *) "\201theora", 7, &encoder);
if (!list) {
GST_ERROR_OBJECT (dec, "couldn't decode comments");
list = gst_tag_list_new_empty ();
}
if (encoder) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER_VERSION, dec->info.version_major,
GST_TAG_VIDEO_CODEC, "Theora", NULL);
if (dec->info.target_bitrate > 0) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_BITRATE, dec->info.target_bitrate,
GST_TAG_NOMINAL_BITRATE, dec->info.target_bitrate, NULL);
}
dec->tags = list;
return GST_FLOW_OK;
}
static GstFlowReturn
theora_negotiate (GstTheoraDec * dec)
{
GstVideoFormat format;
GstQuery *query;
GstBufferPool *pool;
guint size, min, max;
GstStructure *config;
GstCaps *caps;
GstVideoInfo info, cinfo;
/* theora has:
*
* frame_width/frame_height : dimension of the encoded frame
* pic_width/pic_height : dimension of the visible part
* pic_x/pic_y : offset in encoded frame where visible part starts
*/
GST_DEBUG_OBJECT (dec, "frame dimension %dx%d, PAR %d/%d, fps %d/%d",
dec->info.frame_width, dec->info.frame_height,
dec->info.aspect_numerator, dec->info.aspect_denominator,
dec->info.fps_numerator, dec->info.fps_denominator);
GST_DEBUG_OBJECT (dec, "picture dimension %dx%d, offset %d:%d",
dec->info.pic_width, dec->info.pic_height, dec->info.pic_x,
dec->info.pic_y);
switch (dec->info.pixel_fmt) {
case TH_PF_444:
dec->output_bpp = 24;
format = GST_VIDEO_FORMAT_Y444;
break;
case TH_PF_420:
dec->output_bpp = 12; /* Average bits per pixel. */
format = GST_VIDEO_FORMAT_I420;
break;
case TH_PF_422:
dec->output_bpp = 16;
format = GST_VIDEO_FORMAT_Y42B;
break;
default:
goto invalid_format;
}
if (dec->info.pic_width != dec->info.frame_width ||
dec->info.pic_height != dec->info.frame_height ||
dec->info.pic_x != 0 || dec->info.pic_y != 0) {
GST_DEBUG_OBJECT (dec, "we need to crop");
dec->need_cropping = TRUE;
} else {
GST_DEBUG_OBJECT (dec, "no cropping needed");
dec->need_cropping = FALSE;
}
/* info contains the dimensions for the coded picture before cropping */
gst_video_info_init (&info);
gst_video_info_set_format (&info, format, dec->info.frame_width,
dec->info.frame_height);
info.fps_n = dec->info.fps_numerator;
info.fps_d = dec->info.fps_denominator;
/* calculate par
* the info.aspect_* values reflect PAR;
* 0:x and x:0 are allowed and can be interpreted as 1:1.
*/
if (dec->have_par) {
/* we had a par on the sink caps, override the encoded par */
GST_DEBUG_OBJECT (dec, "overriding with input PAR %dx%d", dec->par_num,
dec->par_den);
info.par_n = dec->par_num;
info.par_d = dec->par_den;
} else {
/* take encoded par */
info.par_n = dec->info.aspect_numerator;
info.par_d = dec->info.aspect_denominator;
}
if (info.par_n == 0 || info.par_d == 0) {
info.par_n = info.par_d = 1;
}
/* these values are for all versions of the colorspace specified in the
* theora info */
info.chroma_site = GST_VIDEO_CHROMA_SITE_JPEG;
info.colorimetry.range = GST_VIDEO_COLOR_RANGE_16_235;
info.colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601;
info.colorimetry.transfer = GST_VIDEO_TRANSFER_BT709;
switch (dec->info.colorspace) {
case TH_CS_ITU_REC_470M:
info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
break;
case TH_CS_ITU_REC_470BG:
info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
break;
default:
info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
break;
}
/* remove reconfigure flag now */
gst_pad_check_reconfigure (dec->srcpad);
/* for the output caps we always take the cropped dimensions */
cinfo = info;
gst_video_info_set_format (&cinfo, GST_VIDEO_INFO_FORMAT (&info),
dec->info.pic_width, dec->info.pic_height);
caps = gst_video_info_to_caps (&cinfo);
gst_pad_set_caps (dec->srcpad, caps);
/* find a pool for the negotiated caps now */
query = gst_query_new_allocation (caps, TRUE);
if (gst_pad_peer_query (dec->srcpad, query)) {
/* check if downstream supports cropping */
dec->has_cropping =
gst_query_has_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE);
} else {
/* not a problem, deal with defaults */
GST_DEBUG_OBJECT (dec, "didn't get downstream ALLOCATION hints");
dec->has_cropping = FALSE;
}
if (gst_query_get_n_allocation_pools (query) > 0) {
/* we got configuration from our peer, parse them */
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
} else {
pool = NULL;
size = 0;
min = max = 0;
}
GST_DEBUG_OBJECT (dec, "downstream cropping %d", dec->has_cropping);
if (pool == NULL) {
/* we did not get a pool, make one ourselves then */
pool = gst_video_buffer_pool_new ();
}
if (dec->pool) {
gst_buffer_pool_set_active (dec->pool, FALSE);
gst_object_unref (dec->pool);
}
dec->pool = pool;
if (dec->has_cropping) {
dec->vinfo = info;
/* we can crop, configure the pool with buffers of caps and size of the
* decoded picture size and then crop them with metadata */
gst_caps_unref (caps);
caps = gst_video_info_to_caps (&info);
} else {
/* no cropping, use cropped videoinfo */
dec->vinfo = cinfo;
}
size = MAX (size, GST_VIDEO_INFO_SIZE (&dec->vinfo));
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_caps_unref (caps);
if (gst_query_has_allocation_meta (query, GST_VIDEO_META_API_TYPE)) {
/* just set the option, if the pool can support it we will transparently use
* it through the video info API. We could also see if the pool support this
* option and only activate it then. */
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
gst_query_unref (query);
return GST_FLOW_OK;
/* ERRORS */
invalid_format:
{
GST_ERROR_OBJECT (dec, "Invalid pixel format %d", dec->info.pixel_fmt);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
{
GstFlowReturn ret = GST_FLOW_OK;
GList *walk;
if ((ret = theora_negotiate (dec)) != GST_FLOW_OK)
goto negotiate_failed;
/* done */
dec->decoder = th_decode_alloc (&dec->info, dec->setup);
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_MV,
&dec->telemetry_mv, sizeof (dec->telemetry_mv)) != TH_EIMPL) {
GST_WARNING_OBJECT (dec, "Could not enable MV visualisation");
}
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_MBMODE,
&dec->telemetry_mbmode, sizeof (dec->telemetry_mbmode)) != TH_EIMPL) {
GST_WARNING_OBJECT (dec, "Could not enable MB mode visualisation");
}
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_QI,
&dec->telemetry_qi, sizeof (dec->telemetry_qi)) != TH_EIMPL) {
GST_WARNING_OBJECT (dec, "Could not enable QI mode visualisation");
}
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_BITS,
&dec->telemetry_bits, sizeof (dec->telemetry_bits)) != TH_EIMPL) {
GST_WARNING_OBJECT (dec, "Could not enable BITS mode visualisation");
}
dec->have_header = TRUE;
if (dec->pendingevents) {
for (walk = dec->pendingevents; walk; walk = g_list_next (walk))
gst_pad_push_event (dec->srcpad, GST_EVENT_CAST (walk->data));
g_list_free (dec->pendingevents);
dec->pendingevents = NULL;
}
if (dec->tags) {
gst_pad_push_event (dec->srcpad, gst_event_new_tag (dec->tags));
dec->tags = NULL;
}
return ret;
/* ERRORS */
negotiate_failed:
{
GST_ERROR_OBJECT (dec, "failed to negotiate");
return ret;
}
}
static GstFlowReturn
theora_handle_header_packet (GstTheoraDec * dec, ogg_packet * packet)
{
GstFlowReturn res;
int ret;
GST_DEBUG_OBJECT (dec, "parsing header packet");
ret = th_decode_headerin (&dec->info, &dec->comment, &dec->setup, packet);
if (ret < 0)
goto header_read_error;
switch (packet->packet[0]) {
case 0x81:
res = theora_handle_comment_packet (dec, packet);
break;
case 0x82:
res = theora_handle_type_packet (dec, packet);
break;
default:
/* ignore */
g_warning ("unknown theora header packet found");
case 0x80:
/* nothing special, this is the identification header */
res = GST_FLOW_OK;
break;
}
return res;
/* ERRORS */
header_read_error:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't read header packet"));
return GST_FLOW_ERROR;
}
}
/* returns TRUE if buffer is within segment, else FALSE.
* if Buffer is on segment border, it's timestamp and duration will be clipped */
static gboolean
clip_buffer (GstTheoraDec * dec, GstBuffer * buf)
{
gboolean res = TRUE;
GstClockTime in_ts, in_dur, stop;
guint64 cstart, cstop;
in_ts = GST_BUFFER_TIMESTAMP (buf);
in_dur = GST_BUFFER_DURATION (buf);
GST_LOG_OBJECT (dec,
"timestamp:%" GST_TIME_FORMAT " , duration:%" GST_TIME_FORMAT,
GST_TIME_ARGS (in_ts), GST_TIME_ARGS (in_dur));
/* can't clip without TIME segment */
if (dec->segment.format != GST_FORMAT_TIME)
goto beach;
/* we need a start time */
if (!GST_CLOCK_TIME_IS_VALID (in_ts))
goto beach;
/* generate valid stop, if duration unknown, we have unknown stop */
stop =
GST_CLOCK_TIME_IS_VALID (in_dur) ? (in_ts + in_dur) : GST_CLOCK_TIME_NONE;
/* now clip */
if (!(res = gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
in_ts, stop, &cstart, &cstop)))
goto beach;
/* update timestamp and possibly duration if the clipped stop time is
* valid */
GST_BUFFER_TIMESTAMP (buf) = cstart;
if (GST_CLOCK_TIME_IS_VALID (cstop))
GST_BUFFER_DURATION (buf) = cstop - cstart;
beach:
GST_LOG_OBJECT (dec, "%sdropping", (res ? "not " : ""));
return res;
}
static GstFlowReturn
theora_dec_push_forward (GstTheoraDec * dec, GstBuffer * buf)
{
GstFlowReturn result = GST_FLOW_OK;
if (clip_buffer (dec, buf)) {
if (dec->discont) {
GST_LOG_OBJECT (dec, "setting DISCONT");
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
dec->discont = FALSE;
}
result = gst_pad_push (dec->srcpad, buf);
} else {
gst_buffer_unref (buf);
}
return result;
}
static GstFlowReturn
theora_dec_push_reverse (GstTheoraDec * dec, GstBuffer * buf)
{
GstFlowReturn result = GST_FLOW_OK;
dec->queued = g_list_prepend (dec->queued, buf);
return result;
}
/* Allocate buffer and copy image data into Y444 format */
static GstFlowReturn
theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf, GstBuffer ** out)
{
gint width, height, stride;
gint pic_width, pic_height;
GstFlowReturn result;
int i, comp;
guint8 *dest, *src;
GstVideoFrame frame;
GstVideoCropMeta *crop;
gint offset_x, offset_y;
if G_UNLIKELY
(gst_pad_check_reconfigure (dec->srcpad))
if G_UNLIKELY
((result = theora_negotiate (dec)) != GST_FLOW_OK)
goto negotiate_failed;
result = gst_buffer_pool_acquire_buffer (dec->pool, out, NULL);
if (G_UNLIKELY (result != GST_FLOW_OK))
goto no_buffer;
if (!dec->has_cropping) {
/* we need to crop the hard way */
offset_x = dec->info.pic_x;
offset_y = dec->info.pic_y;
pic_width = dec->info.pic_width;
pic_height = dec->info.pic_height;
/* Ensure correct offsets in chroma for formats that need it
* by rounding the offset. libtheora will add proper pixels,
* so no need to handle them ourselves. */
if (offset_x & 1 && dec->info.pixel_fmt != TH_PF_444)
offset_x--;
if (offset_y & 1 && dec->info.pixel_fmt == TH_PF_420)
offset_y--;
} else {
/* copy the whole frame */
offset_x = 0;
offset_y = 0;
pic_width = dec->info.frame_width;
pic_height = dec->info.frame_height;
if (dec->has_cropping && dec->need_cropping) {
crop = gst_buffer_add_video_crop_meta (*out);
/* we can do things slightly more efficient when we know that
* downstream understands clipping */
crop->x = dec->info.pic_x;
crop->y = dec->info.pic_y;
crop->width = dec->info.pic_width;
crop->height = dec->info.pic_height;
}
}
/* if only libtheora would allow us to give it a destination frame */
GST_CAT_TRACE_OBJECT (GST_CAT_PERFORMANCE, dec,
"doing unavoidable video frame copy");
if G_UNLIKELY
(!gst_video_frame_map (&frame, &dec->vinfo, *out, GST_MAP_WRITE))
goto invalid_frame;
for (comp = 0; comp < 3; comp++) {
width =
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (frame.info.finfo, comp, pic_width);
height =
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (frame.info.finfo, comp, pic_height);
stride = GST_VIDEO_FRAME_COMP_STRIDE (&frame, comp);
dest = GST_VIDEO_FRAME_COMP_DATA (&frame, comp);
src = buf[comp].data;
src += ((height == pic_height) ? offset_y : offset_y / 2)
* buf[comp].stride;
src += (width == pic_width) ? offset_x : offset_x / 2;
for (i = 0; i < height; i++) {
memcpy (dest, src, width);
dest += stride;
src += buf[comp].stride;
}
}
gst_video_frame_unmap (&frame);
return GST_FLOW_OK;
/* ERRORS */
negotiate_failed:
{
GST_DEBUG_OBJECT (dec, "could not negotiate, reason: %s",
gst_flow_get_name (result));
return result;
}
no_buffer:
{
GST_DEBUG_OBJECT (dec, "could not get buffer, reason: %s",
gst_flow_get_name (result));
return result;
}
invalid_frame:
{
GST_DEBUG_OBJECT (dec, "could not map video frame");
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
theora_handle_data_packet (GstTheoraDec * dec, ogg_packet * packet,
GstClockTime outtime, GstClockTime outdur)
{
/* normal data packet */
th_ycbcr_buffer buf;
GstBuffer *out;
gboolean keyframe;
GstFlowReturn result;
ogg_int64_t gp;
if (G_UNLIKELY (!dec->have_header))
goto not_initialized;
/* get timestamp and durations */
if (outtime == -1)
outtime = dec->last_timestamp;
if (outdur == -1)
outdur = gst_util_uint64_scale_int (GST_SECOND, dec->info.fps_denominator,
dec->info.fps_numerator);
/* calculate expected next timestamp */
if (outtime != -1 && outdur != -1)
dec->last_timestamp = outtime + outdur;
/* the second most significant bit of the first data byte is cleared
* for keyframes. We can only check it if it's not a zero-length packet. */
keyframe = packet->bytes && ((packet->packet[0] & 0x40) == 0);
if (G_UNLIKELY (keyframe)) {
GST_DEBUG_OBJECT (dec, "we have a keyframe");
dec->need_keyframe = FALSE;
} else if (G_UNLIKELY (dec->need_keyframe)) {
goto dropping;
}
GST_DEBUG_OBJECT (dec, "parsing data packet");
/* this does the decoding */
if (G_UNLIKELY (th_decode_packetin (dec->decoder, packet, &gp) < 0))
goto decode_error;
if (outtime != -1) {
gboolean need_skip;
GstClockTime running_time;
GstClockTime earliest_time;
gdouble proportion;
/* qos needs to be done on running time */
running_time = gst_segment_to_running_time (&dec->segment, GST_FORMAT_TIME,
outtime);
GST_OBJECT_LOCK (dec);
proportion = dec->proportion;
earliest_time = dec->earliest_time;
/* check for QoS, don't perform the last steps of getting and
* pushing the buffers that are known to be late. */
need_skip = earliest_time != -1 && running_time <= earliest_time;
GST_OBJECT_UNLOCK (dec);
if (need_skip) {
GstMessage *qos_msg;
guint64 stream_time;
gint64 jitter;
GST_DEBUG_OBJECT (dec, "skipping decoding: qostime %"
GST_TIME_FORMAT " <= %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time), GST_TIME_ARGS (earliest_time));
dec->dropped++;
stream_time =
gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, outtime);
jitter = GST_CLOCK_DIFF (running_time, earliest_time);
qos_msg =
gst_message_new_qos (GST_OBJECT_CAST (dec), FALSE, running_time,
stream_time, outtime, outdur);
gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000);
gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
dec->processed, dec->dropped);
gst_element_post_message (GST_ELEMENT_CAST (dec), qos_msg);
goto dropping_qos;
}
}
/* this does postprocessing and set up the decoded frame
* pointers in our yuv variable */
if (G_UNLIKELY (th_decode_ycbcr_out (dec->decoder, buf) < 0))
goto no_yuv;
if (G_UNLIKELY ((buf[0].width != dec->info.frame_width)
|| (buf[0].height != dec->info.frame_height)))
goto wrong_dimensions;
result = theora_handle_image (dec, buf, &out);
if (result != GST_FLOW_OK)
return result;
GST_BUFFER_OFFSET (out) = dec->frame_nr;
if (dec->frame_nr != -1)
dec->frame_nr++;
GST_BUFFER_OFFSET_END (out) = dec->frame_nr;
GST_BUFFER_TIMESTAMP (out) = outtime;
GST_BUFFER_DURATION (out) = outdur;
dec->processed++;
if (dec->segment.rate >= 0.0)
result = theora_dec_push_forward (dec, out);
else
result = theora_dec_push_reverse (dec, out);
return result;
/* ERRORS */
not_initialized:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("no header sent yet"));
return GST_FLOW_ERROR;
}
dropping:
{
GST_WARNING_OBJECT (dec, "dropping frame because we need a keyframe");
dec->discont = TRUE;
return GST_FLOW_OK;
}
dropping_qos:
{
if (dec->frame_nr != -1)
dec->frame_nr++;
dec->discont = TRUE;
GST_WARNING_OBJECT (dec, "dropping frame because of QoS");
return GST_FLOW_OK;
}
decode_error:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("theora decoder did not decode data packet"));
return GST_FLOW_ERROR;
}
no_yuv:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't read out YUV image"));
return GST_FLOW_ERROR;
}
wrong_dimensions:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, FORMAT,
(NULL), ("dimensions of image do not match header"));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
theora_dec_decode_buffer (GstTheoraDec * dec, GstBuffer * buf)
{
ogg_packet packet;
GstFlowReturn result = GST_FLOW_OK;
GstClockTime timestamp, duration;
GstMapInfo map;
/* make ogg_packet out of the buffer */
gst_buffer_map (buf, &map, GST_MAP_READ);
packet.packet = map.data;
packet.bytes = map.size;
packet.granulepos = -1;
packet.packetno = 0; /* we don't really care */
packet.b_o_s = dec->have_header ? 0 : 1;
/* EOS does not matter for the decoder */
packet.e_o_s = 0;
GST_LOG_OBJECT (dec, "decode buffer of size %ld", packet.bytes);
/* save last seem timestamp for interpolating the next timestamps using the
* framerate when we need to */
timestamp = GST_BUFFER_TIMESTAMP (buf);
duration = GST_BUFFER_DURATION (buf);
GST_DEBUG_OBJECT (dec, "header=%02x, outtime=%" GST_TIME_FORMAT,
packet.bytes ? packet.packet[0] : -1, GST_TIME_ARGS (timestamp));
/* switch depending on packet type. A zero byte packet is always a data
* packet; we don't dereference it in that case. */
if (packet.bytes && packet.packet[0] & 0x80) {
if (dec->have_header) {
GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
goto done;
}
result = theora_handle_header_packet (dec, &packet);
} else {
result = theora_handle_data_packet (dec, &packet, timestamp, duration);
}
done:
gst_buffer_unmap (buf, &map);
return result;
}
/* For reverse playback we use a technique that can be used for
* any keyframe based video codec.
*
* Input:
* Buffer decoding order: 7 8 9 4 5 6 1 2 3 EOS
* Keyframe flag: K K
* Discont flag: D D D
*
* - Each Discont marks a discont in the decoding order.
* - The keyframes mark where we can start decoding.
*
* First we prepend incomming buffers to the gather queue, whenever we receive
* a discont, we flush out the gather queue.
*
* The above data will be accumulated in the gather queue like this:
*
* gather queue: 9 8 7
* D
*
* Whe buffer 4 is received (with a DISCONT), we flush the gather queue like
* this:
*
* while (gather)
* take head of queue and prepend to decode queue.
* if we copied a keyframe, decode the decode queue.
*
* After we flushed the gather queue, we add 4 to the (now empty) gather queue.
* We get the following situation:
*
* gather queue: 4
* decode queue: 7 8 9
*
* After we received 5 (Keyframe) and 6:
*
* gather queue: 6 5 4
* decode queue: 7 8 9
*
* When we receive 1 (DISCONT) which triggers a flush of the gather queue:
*
* Copy head of the gather queue (6) to decode queue:
*
* gather queue: 5 4
* decode queue: 6 7 8 9
*
* Copy head of the gather queue (5) to decode queue. This is a keyframe so we
* can start decoding.
*
* gather queue: 4
* decode queue: 5 6 7 8 9
*
* Decode frames in decode queue, store raw decoded data in output queue, we
* can take the head of the decode queue and prepend the decoded result in the
* output queue:
*
* gather queue: 4
* decode queue:
* output queue: 9 8 7 6 5
*
* Now output all the frames in the output queue, picking a frame from the
* head of the queue.
*
* Copy head of the gather queue (4) to decode queue, we flushed the gather
* queue and can now store input buffer in the gather queue:
*
* gather queue: 1
* decode queue: 4
*
* When we receive EOS, the queue looks like:
*
* gather queue: 3 2 1
* decode queue: 4
*
* Fill decode queue, first keyframe we copy is 2:
*
* gather queue: 1
* decode queue: 2 3 4
*
* Decoded output:
*
* gather queue: 1
* decode queue:
* output queue: 4 3 2
*
* Leftover buffer 1 cannot be decoded and must be discarded.
*/
static GstFlowReturn
theora_dec_flush_decode (GstTheoraDec * dec)
{
GstFlowReturn res = GST_FLOW_OK;
while (dec->decode) {
GstBuffer *buf = GST_BUFFER_CAST (dec->decode->data);
GST_DEBUG_OBJECT (dec, "decoding buffer %p, ts %" GST_TIME_FORMAT,
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
/* decode buffer, prepend to output queue */
res = theora_dec_decode_buffer (dec, buf);
/* don't need it anymore now */
gst_buffer_unref (buf);
dec->decode = g_list_delete_link (dec->decode, dec->decode);
}
while (dec->queued) {
GstBuffer *buf = GST_BUFFER_CAST (dec->queued->data);
/* iterate output queue an push downstream */
res = gst_pad_push (dec->srcpad, buf);
dec->queued = g_list_delete_link (dec->queued, dec->queued);
}
return res;
}
static GstFlowReturn
theora_dec_chain_reverse (GstTheoraDec * dec, gboolean discont, GstBuffer * buf)
{
GstFlowReturn res = GST_FLOW_OK;
/* if we have a discont, move buffers to the decode list */
if (G_UNLIKELY (discont)) {
GST_DEBUG_OBJECT (dec, "received discont,gathering buffers");
while (dec->gather) {
GstBuffer *gbuf;
guint8 data[1];
gbuf = GST_BUFFER_CAST (dec->gather->data);
/* remove from the gather list */
dec->gather = g_list_delete_link (dec->gather, dec->gather);
/* copy to decode queue */
dec->decode = g_list_prepend (dec->decode, gbuf);
/* if we copied a keyframe, flush and decode the decode queue */
if (gst_buffer_extract (gbuf, 0, data, 1) == 1) {
if ((data[0] & 0x40) == 0) {
GST_DEBUG_OBJECT (dec, "copied keyframe");
res = theora_dec_flush_decode (dec);
}
}
}
}
/* add buffer to gather queue */
GST_DEBUG_OBJECT (dec, "gathering buffer %p, size %" G_GSIZE_FORMAT, buf,
gst_buffer_get_size (buf));
dec->gather = g_list_prepend (dec->gather, buf);
return res;
}
static GstFlowReturn
theora_dec_chain_forward (GstTheoraDec * dec, gboolean discont,
GstBuffer * buffer)
{
GstFlowReturn result;
result = theora_dec_decode_buffer (dec, buffer);
gst_buffer_unref (buffer);
return result;
}
static GstFlowReturn
theora_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstTheoraDec *dec;
GstFlowReturn res;
gboolean discont;
dec = GST_THEORA_DEC (parent);
/* peel of DISCONT flag */
discont = GST_BUFFER_IS_DISCONT (buf);
/* resync on DISCONT */
if (G_UNLIKELY (discont)) {
GST_DEBUG_OBJECT (dec, "received DISCONT buffer");
dec->need_keyframe = TRUE;
dec->last_timestamp = -1;
dec->discont = TRUE;
}
if (dec->segment.rate > 0.0)
res = theora_dec_chain_forward (dec, discont, buf);
else
res = theora_dec_chain_reverse (dec, discont, buf);
return res;
}
static GstStateChangeReturn
theora_dec_change_state (GstElement * element, GstStateChange transition)
{
GstTheoraDec *dec = GST_THEORA_DEC (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
th_info_clear (&dec->info);
th_comment_clear (&dec->comment);
GST_DEBUG_OBJECT (dec, "Setting have_header to FALSE in READY->PAUSED");
dec->have_header = FALSE;
dec->have_par = FALSE;
gst_theora_dec_reset (dec);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
th_info_clear (&dec->info);
th_comment_clear (&dec->comment);
th_setup_free (dec->setup);
dec->setup = NULL;
th_decode_free (dec->decoder);
dec->decoder = NULL;
gst_theora_dec_reset (dec);
if (dec->pool) {
gst_buffer_pool_set_active (dec->pool, FALSE);
gst_object_unref (dec->pool);
dec->pool = NULL;
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
theora_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTheoraDec *dec = GST_THEORA_DEC (object);
switch (prop_id) {
case PROP_TELEMETRY_MV:
dec->telemetry_mv = g_value_get_int (value);
break;
case PROP_TELEMETRY_MBMODE:
dec->telemetry_mbmode = g_value_get_int (value);
break;
case PROP_TELEMETRY_QI:
dec->telemetry_qi = g_value_get_int (value);
break;
case PROP_TELEMETRY_BITS:
dec->telemetry_bits = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
theora_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTheoraDec *dec = GST_THEORA_DEC (object);
switch (prop_id) {
case PROP_TELEMETRY_MV:
g_value_set_int (value, dec->telemetry_mv);
break;
case PROP_TELEMETRY_MBMODE:
g_value_set_int (value, dec->telemetry_mbmode);
break;
case PROP_TELEMETRY_QI:
g_value_set_int (value, dec->telemetry_qi);
break;
case PROP_TELEMETRY_BITS:
g_value_set_int (value, dec->telemetry_bits);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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