mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-18 15:51:11 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/ogg/gstoggdemux.c
Wim Taymans d0bd5f04c0 update for new scheduling query
2011-11-18 17:58:58 +01:00

4498 lines
129 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* gstoggdemux.c: ogg stream demuxer
*
* 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-oggdemux
* @see_also: <link linkend="gst-plugins-base-plugins-oggmux">oggmux</link>
*
* This element demuxes ogg files into their encoded audio and video components.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v filesrc location=test.ogg ! oggdemux ! vorbisdec ! audioconvert ! alsasink
* ]| Decodes the vorbis audio stored inside an ogg container.
* </refsect2>
*
* Last reviewed on 2006-12-30 (0.10.5)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/tag/tag.h>
#include "gstoggdemux.h"
#define CHUNKSIZE (8500) /* this is out of vorbisfile */
/* we hope we get a granpos within this many bytes off the end */
#define DURATION_CHUNK_OFFSET (64*1024)
/* stop duration checks within this much of EOS */
#define EOS_AVOIDANCE_THRESHOLD 8192
#define GST_FLOW_LIMIT GST_FLOW_CUSTOM_ERROR
#define GST_FLOW_SKIP_PUSH GST_FLOW_CUSTOM_SUCCESS_1
#define GST_CHAIN_LOCK(ogg) g_mutex_lock((ogg)->chain_lock)
#define GST_CHAIN_UNLOCK(ogg) g_mutex_unlock((ogg)->chain_lock)
#define GST_PUSH_LOCK(ogg) \
do { \
GST_TRACE_OBJECT(ogg, "Push lock"); \
g_mutex_lock((ogg)->push_lock); \
} while(0)
#define GST_PUSH_UNLOCK(ogg) \
do { \
GST_TRACE_OBJECT(ogg, "Push unlock"); \
g_mutex_unlock((ogg)->push_lock); \
} while(0)
GST_DEBUG_CATEGORY (gst_ogg_demux_debug);
GST_DEBUG_CATEGORY (gst_ogg_demux_setup_debug);
#define GST_CAT_DEFAULT gst_ogg_demux_debug
static ogg_packet *
_ogg_packet_copy (const ogg_packet * packet)
{
ogg_packet *ret = g_slice_new (ogg_packet);
*ret = *packet;
ret->packet = g_memdup (packet->packet, packet->bytes);
return ret;
}
static void
_ogg_packet_free (ogg_packet * packet)
{
g_free (packet->packet);
g_slice_free (ogg_packet, packet);
}
static ogg_page *
gst_ogg_page_copy (ogg_page * page)
{
ogg_page *p = g_slice_new (ogg_page);
/* make a copy of the page */
p->header = g_memdup (page->header, page->header_len);
p->header_len = page->header_len;
p->body = g_memdup (page->body, page->body_len);
p->body_len = page->body_len;
return p;
}
static void
gst_ogg_page_free (ogg_page * page)
{
g_free (page->header);
g_free (page->body);
g_slice_free (ogg_page, page);
}
static gboolean gst_ogg_demux_collect_chain_info (GstOggDemux * ogg,
GstOggChain * chain);
static gboolean gst_ogg_demux_activate_chain (GstOggDemux * ogg,
GstOggChain * chain, GstEvent * event);
static void gst_ogg_pad_mark_discont (GstOggPad * pad);
static void gst_ogg_chain_mark_discont (GstOggChain * chain);
static gboolean gst_ogg_demux_perform_seek (GstOggDemux * ogg,
GstEvent * event);
static gboolean gst_ogg_demux_receive_event (GstElement * element,
GstEvent * event);
static void gst_ogg_pad_dispose (GObject * object);
static void gst_ogg_pad_finalize (GObject * object);
static gboolean gst_ogg_pad_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_ogg_pad_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstOggPad *gst_ogg_chain_get_stream (GstOggChain * chain,
guint32 serialno);
static GstFlowReturn gst_ogg_demux_combine_flows (GstOggDemux * ogg,
GstOggPad * pad, GstFlowReturn ret);
static void gst_ogg_demux_sync_streams (GstOggDemux * ogg);
GstCaps *gst_ogg_demux_set_header_on_caps (GstOggDemux * ogg,
GstCaps * caps, GList * headers);
static gboolean gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event);
static gboolean gst_ogg_demux_perform_seek_push (GstOggDemux * ogg,
GstEvent * event);
static gboolean gst_ogg_demux_check_duration_push (GstOggDemux * ogg,
GstSeekFlags flags, GstEvent * event);
GType gst_ogg_pad_get_type (void);
G_DEFINE_TYPE (GstOggPad, gst_ogg_pad, GST_TYPE_PAD);
static void
gst_ogg_pad_class_init (GstOggPadClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->dispose = gst_ogg_pad_dispose;
gobject_class->finalize = gst_ogg_pad_finalize;
}
static void
gst_ogg_pad_init (GstOggPad * pad)
{
gst_pad_set_event_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_event));
gst_pad_set_query_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_src_query));
gst_pad_use_fixed_caps (GST_PAD (pad));
pad->mode = GST_OGG_PAD_MODE_INIT;
pad->current_granule = -1;
pad->keyframe_granule = -1;
pad->start_time = GST_CLOCK_TIME_NONE;
pad->position = GST_CLOCK_TIME_NONE;
pad->have_type = FALSE;
pad->continued = NULL;
pad->map.headers = NULL;
pad->map.queued = NULL;
pad->map.granulerate_n = 0;
pad->map.granulerate_d = 0;
pad->map.granuleshift = -1;
}
static void
gst_ogg_pad_dispose (GObject * object)
{
GstOggPad *pad = GST_OGG_PAD (object);
pad->chain = NULL;
pad->ogg = NULL;
g_list_foreach (pad->map.headers, (GFunc) _ogg_packet_free, NULL);
g_list_free (pad->map.headers);
pad->map.headers = NULL;
g_list_foreach (pad->map.queued, (GFunc) _ogg_packet_free, NULL);
g_list_free (pad->map.queued);
pad->map.queued = NULL;
g_free (pad->map.index);
pad->map.index = NULL;
/* clear continued pages */
g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
g_list_free (pad->continued);
pad->continued = NULL;
if (pad->map.caps) {
gst_caps_unref (pad->map.caps);
pad->map.caps = NULL;
}
if (pad->map.taglist) {
gst_tag_list_free (pad->map.taglist);
pad->map.taglist = NULL;
}
ogg_stream_reset (&pad->map.stream);
G_OBJECT_CLASS (gst_ogg_pad_parent_class)->dispose (object);
}
static void
gst_ogg_pad_finalize (GObject * object)
{
GstOggPad *pad = GST_OGG_PAD (object);
ogg_stream_clear (&pad->map.stream);
G_OBJECT_CLASS (gst_ogg_pad_parent_class)->finalize (object);
}
static gboolean
gst_ogg_pad_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res = TRUE;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gint64 total_time = -1;
gst_query_parse_duration (query, &format, NULL);
/* can only get position in time */
if (format != GST_FORMAT_TIME)
goto wrong_format;
if (ogg->total_time != -1) {
/* we can return the total length */
total_time = ogg->total_time;
} else {
gint bitrate = ogg->bitrate;
/* try with length and bitrate */
if (bitrate > 0) {
GstQuery *uquery;
/* ask upstream for total length in bytes */
uquery = gst_query_new_duration (GST_FORMAT_BYTES);
if (gst_pad_peer_query (ogg->sinkpad, uquery)) {
gint64 length;
gst_query_parse_duration (uquery, NULL, &length);
/* estimate using the bitrate */
total_time =
gst_util_uint64_scale (length, 8 * GST_SECOND, bitrate);
GST_LOG_OBJECT (ogg,
"length: %" G_GINT64_FORMAT ", bitrate %d, total_time %"
GST_TIME_FORMAT, length, bitrate, GST_TIME_ARGS (total_time));
}
gst_query_unref (uquery);
}
}
gst_query_set_duration (query, GST_FORMAT_TIME, total_time);
break;
}
case GST_QUERY_SEEKING:
{
GstFormat format;
gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
if (format == GST_FORMAT_TIME) {
gboolean seekable = FALSE;
gint64 stop = -1;
if (ogg->pullmode) {
seekable = TRUE;
stop = ogg->total_time;
} else if (ogg->current_chain->streams->len) {
gint i;
seekable = FALSE;
for (i = 0; i < ogg->current_chain->streams->len; i++) {
GstOggPad *pad =
g_array_index (ogg->current_chain->streams, GstOggPad *, i);
seekable = TRUE;
if (pad->map.index != NULL && pad->map.n_index != 0) {
GstOggIndex *idx;
GstClockTime idx_time;
idx = &pad->map.index[pad->map.n_index - 1];
idx_time =
gst_util_uint64_scale (idx->timestamp, GST_SECOND,
pad->map.kp_denom);
if (stop == -1)
stop = idx_time;
else
stop = MAX (idx_time, stop);
} else {
stop = -1; /* we've no clue, sadly, without seeking */
}
}
}
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, stop);
} else {
res = FALSE;
}
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
done:
return res;
/* ERRORS */
wrong_format:
{
GST_DEBUG_OBJECT (ogg, "only query duration on TIME is supported");
res = FALSE;
goto done;
}
}
static gboolean
gst_ogg_demux_receive_event (GstElement * element, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (element);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* now do the seek */
res = gst_ogg_demux_perform_seek (ogg, event);
gst_event_unref (event);
break;
default:
GST_DEBUG_OBJECT (ogg, "We only handle seek events here");
goto error;
}
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (ogg, "error handling event");
gst_event_unref (event);
return FALSE;
}
}
static gboolean
gst_ogg_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* now do the seek */
res = gst_ogg_demux_perform_seek (ogg, event);
gst_event_unref (event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static void
gst_ogg_pad_reset (GstOggPad * pad)
{
ogg_stream_reset (&pad->map.stream);
GST_DEBUG_OBJECT (pad, "doing reset");
/* clear continued pages */
g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
g_list_free (pad->continued);
pad->continued = NULL;
pad->last_ret = GST_FLOW_OK;
pad->position = GST_CLOCK_TIME_NONE;
pad->current_granule = -1;
pad->keyframe_granule = -1;
pad->is_eos = FALSE;
}
/* queue data, basically takes the packet, puts it in a buffer and store the
* buffer in the queued list. */
static GstFlowReturn
gst_ogg_demux_queue_data (GstOggPad * pad, ogg_packet * packet)
{
#ifndef GST_DISABLE_GST_DEBUG
GstOggDemux *ogg = pad->ogg;
#endif
GST_DEBUG_OBJECT (ogg, "%p queueing data serial %08x",
pad, pad->map.serialno);
pad->map.queued = g_list_append (pad->map.queued, _ogg_packet_copy (packet));
/* we are ok now */
return GST_FLOW_OK;
}
static GstFlowReturn
gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet,
gboolean push_headers)
{
GstBuffer *buf = NULL;
GstFlowReturn ret, cret;
GstOggDemux *ogg = pad->ogg;
gint64 current_time;
GstOggChain *chain;
gint64 duration;
gint offset;
gint trim;
GstClockTime out_timestamp, out_duration;
guint64 out_offset, out_offset_end;
gboolean delta_unit = FALSE;
cret = GST_FLOW_OK;
GST_PUSH_LOCK (ogg);
if (!ogg->pullmode && ogg->push_state == PUSH_PLAYING
&& ogg->push_time_length == GST_CLOCK_TIME_NONE
&& !ogg->push_disable_seeking) {
if (!ogg->building_chain) {
/* we got all headers, now try to get duration */
if (!gst_ogg_demux_check_duration_push (ogg, GST_SEEK_FLAG_FLUSH, NULL)) {
GST_PUSH_UNLOCK (ogg);
return GST_FLOW_OK;
}
}
GST_PUSH_UNLOCK (ogg);
return GST_FLOW_OK;
}
GST_PUSH_UNLOCK (ogg);
GST_DEBUG_OBJECT (ogg,
"%p streaming to peer serial %08x", pad, pad->map.serialno);
if (pad->map.is_ogm) {
const guint8 *data;
long bytes;
data = packet->packet;
bytes = packet->bytes;
if (bytes < 1)
goto empty_packet;
if ((data[0] & 1) || (data[0] & 3 && pad->map.is_ogm_text)) {
/* We don't push header packets for OGM */
goto done;
}
offset = 1 + (((data[0] & 0xc0) >> 6) | ((data[0] & 0x02) << 1));
delta_unit = (((data[0] & 0x08) >> 3) == 0);
trim = 0;
/* Strip trailing \0 for subtitles */
if (pad->map.is_ogm_text) {
while (bytes && data[bytes - 1] == 0) {
trim++;
bytes--;
}
}
} else if (pad->map.is_vp8) {
if ((packet->bytes >= 7 && memcmp (packet->packet, "OVP80\2 ", 7) == 0) ||
packet->b_o_s ||
(packet->bytes >= 5 && memcmp (packet->packet, "OVP80", 5) == 0)) {
/* We don't push header packets for VP8 */
goto done;
}
offset = 0;
trim = 0;
} else {
offset = 0;
trim = 0;
}
/* get timing info for the packet */
if (gst_ogg_stream_packet_is_header (&pad->map, packet)) {
duration = 0;
GST_DEBUG_OBJECT (ogg, "packet is header");
} else {
duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
GST_DEBUG_OBJECT (ogg, "packet duration %" G_GUINT64_FORMAT, duration);
}
if (packet->b_o_s) {
out_timestamp = GST_CLOCK_TIME_NONE;
out_duration = GST_CLOCK_TIME_NONE;
out_offset = 0;
out_offset_end = -1;
} else {
if (packet->granulepos != -1) {
pad->current_granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
packet->granulepos);
pad->keyframe_granule =
gst_ogg_stream_granulepos_to_key_granule (&pad->map,
packet->granulepos);
GST_DEBUG_OBJECT (ogg, "new granule %" G_GUINT64_FORMAT,
pad->current_granule);
} else if (ogg->segment.rate > 0.0 && pad->current_granule != -1) {
pad->current_granule += duration;
GST_DEBUG_OBJECT (ogg, "interpollating granule %" G_GUINT64_FORMAT,
pad->current_granule);
}
if (ogg->segment.rate < 0.0 && packet->granulepos == -1) {
/* negative rates, only set timestamp on the packets with a granulepos */
out_timestamp = -1;
out_duration = -1;
out_offset = -1;
out_offset_end = -1;
} else {
/* we only push buffers after we have a valid granule. This is done so that
* we nicely skip packets without a timestamp after a seek. This is ok
* because we base or seek on the packet after the page with the smaller
* timestamp. */
if (pad->current_granule == -1)
goto no_timestamp;
if (pad->map.is_ogm) {
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule);
out_duration = gst_util_uint64_scale (duration,
GST_SECOND * pad->map.granulerate_d, pad->map.granulerate_n);
} else if (pad->map.is_sparse) {
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule);
if (duration == GST_CLOCK_TIME_NONE) {
out_duration = GST_CLOCK_TIME_NONE;
} else {
out_duration = gst_util_uint64_scale (duration,
GST_SECOND * pad->map.granulerate_d, pad->map.granulerate_n);
}
} else {
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule - duration);
out_duration =
gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule) - out_timestamp;
}
out_offset_end =
gst_ogg_stream_granule_to_granulepos (&pad->map,
pad->current_granule, pad->keyframe_granule);
out_offset =
gst_ogg_stream_granule_to_time (&pad->map, pad->current_granule);
}
}
if (pad->map.is_ogm_text) {
/* check for invalid buffer sizes */
if (G_UNLIKELY (offset + trim >= packet->bytes))
goto empty_packet;
}
if (!pad->added)
goto not_added;
buf = gst_buffer_new_and_alloc (packet->bytes - offset - trim);
/* set delta flag for OGM content */
if (delta_unit)
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
/* copy packet in buffer */
gst_buffer_fill (buf, 0, packet->packet + offset,
packet->bytes - offset - trim);
GST_BUFFER_TIMESTAMP (buf) = out_timestamp;
GST_BUFFER_DURATION (buf) = out_duration;
GST_BUFFER_OFFSET (buf) = out_offset;
GST_BUFFER_OFFSET_END (buf) = out_offset_end;
/* Mark discont on the buffer */
if (pad->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
pad->discont = FALSE;
}
pad->position = ogg->segment.position;
/* don't push the header packets when we are asked to skip them */
if (!packet->b_o_s || push_headers) {
ret = gst_pad_push (GST_PAD_CAST (pad), buf);
buf = NULL;
/* combine flows */
cret = gst_ogg_demux_combine_flows (ogg, pad, ret);
}
/* we're done with skeleton stuff */
if (pad->map.is_skeleton)
goto done;
/* check if valid granulepos, then we can calculate the current
* position. We know the granule for each packet but we only want to update
* the position when we have a valid granulepos on the packet because else
* our time jumps around for the different streams. */
if (packet->granulepos < 0)
goto done;
/* convert to time */
current_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
packet->granulepos);
/* convert to stream time */
if ((chain = pad->chain)) {
gint64 chain_start = 0;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
chain_start = chain->segment_start;
current_time = current_time - chain_start + chain->begin_time;
}
/* and store as the current position */
ogg->segment.position = current_time;
GST_DEBUG_OBJECT (ogg, "ogg current time %" GST_TIME_FORMAT,
GST_TIME_ARGS (current_time));
/* check stream eos */
if ((ogg->segment.rate > 0.0 && ogg->segment.stop != GST_CLOCK_TIME_NONE &&
current_time > ogg->segment.stop) ||
(ogg->segment.rate < 0.0 && ogg->segment.start != GST_CLOCK_TIME_NONE &&
current_time < ogg->segment.start)) {
GST_DEBUG_OBJECT (ogg, "marking pad %p EOS", pad);
pad->is_eos = TRUE;
}
done:
if (buf)
gst_buffer_unref (buf);
/* return combined flow result */
return cret;
/* special cases */
empty_packet:
{
GST_DEBUG_OBJECT (ogg, "Skipping empty packet");
goto done;
}
no_timestamp:
{
GST_DEBUG_OBJECT (ogg, "skipping packet: no valid granule found yet");
goto done;
}
not_added:
{
GST_DEBUG_OBJECT (ogg, "pad not added yet");
goto done;
}
}
static guint64
gst_ogg_demux_collect_start_time (GstOggDemux * ogg, GstOggChain * chain)
{
gint i;
guint64 start_time = G_MAXUINT64;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.is_skeleton)
continue;
/* can do this if the pad start time is not defined */
GST_DEBUG_OBJECT (ogg, "Pad %08x (%s) start time is %" GST_TIME_FORMAT,
pad->map.serialno, gst_ogg_stream_get_media_type (&pad->map),
GST_TIME_ARGS (pad->start_time));
if (pad->start_time == GST_CLOCK_TIME_NONE) {
if (!pad->map.is_sparse) {
start_time = G_MAXUINT64;
break;
}
} else {
start_time = MIN (start_time, pad->start_time);
}
}
return start_time;
}
static GstClockTime
gst_ogg_demux_collect_sync_time (GstOggDemux * ogg, GstOggChain * chain)
{
gint i;
GstClockTime sync_time = GST_CLOCK_TIME_NONE;
if (!chain) {
GST_WARNING_OBJECT (ogg, "No chain!");
return GST_CLOCK_TIME_NONE;
}
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.is_sparse)
continue;
if (pad->push_sync_time == GST_CLOCK_TIME_NONE) {
sync_time = GST_CLOCK_TIME_NONE;
break;
} else {
if (sync_time == GST_CLOCK_TIME_NONE)
sync_time = pad->push_sync_time;
else
sync_time = MAX (sync_time, pad->push_sync_time);
}
}
return sync_time;
}
/* submit a packet to the oggpad, this function will run the
* typefind code for the pad if this is the first packet for this
* stream
*/
static GstFlowReturn
gst_ogg_pad_submit_packet (GstOggPad * pad, ogg_packet * packet)
{
gint64 granule;
GstFlowReturn ret = GST_FLOW_OK;
GstOggDemux *ogg = pad->ogg;
GST_DEBUG_OBJECT (ogg, "%p submit packet serial %08x",
pad, pad->map.serialno);
if (!pad->have_type) {
pad->have_type = gst_ogg_stream_setup_map (&pad->map, packet);
if (!pad->have_type) {
pad->map.caps = gst_caps_new_empty_simple ("application/x-unknown");
}
if (pad->map.is_skeleton) {
GST_DEBUG_OBJECT (ogg, "we have a fishead");
/* copy values over to global ogg level */
ogg->basetime = pad->map.basetime;
ogg->prestime = pad->map.prestime;
/* use total time to update the total ogg time */
if (ogg->total_time == -1) {
ogg->total_time = pad->map.total_time;
} else if (pad->map.total_time > 0) {
ogg->total_time = MAX (ogg->total_time, pad->map.total_time);
}
}
if (pad->map.caps) {
gst_pad_set_caps (GST_PAD (pad), pad->map.caps);
} else {
GST_WARNING_OBJECT (ogg, "stream parser didn't create src pad caps");
}
}
if (pad->map.is_skeleton) {
guint32 serialno;
GstOggPad *skel_pad;
GstOggSkeleton type;
/* try to parse the serialno first */
if (gst_ogg_map_parse_fisbone (&pad->map, packet->packet, packet->bytes,
&serialno, &type)) {
GST_DEBUG_OBJECT (pad->ogg,
"got skeleton packet for stream 0x%08x", serialno);
skel_pad = gst_ogg_chain_get_stream (pad->chain, serialno);
if (skel_pad) {
switch (type) {
case GST_OGG_SKELETON_FISBONE:
/* parse the remainder of the fisbone in the pad with the serialno,
* note that we ignore the start_time as this is usually wrong for
* live streams */
gst_ogg_map_add_fisbone (&skel_pad->map, &pad->map, packet->packet,
packet->bytes, NULL);
break;
case GST_OGG_SKELETON_INDEX:
gst_ogg_map_add_index (&skel_pad->map, &pad->map, packet->packet,
packet->bytes);
/* use total time to update the total ogg time */
if (ogg->total_time == -1) {
ogg->total_time = skel_pad->map.total_time;
} else if (skel_pad->map.total_time > 0) {
ogg->total_time = MAX (ogg->total_time, skel_pad->map.total_time);
}
break;
default:
break;
}
} else {
GST_WARNING_OBJECT (pad->ogg,
"found skeleton fisbone for an unknown stream 0x%08x", serialno);
}
}
}
granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
packet->granulepos);
if (granule != -1) {
GST_DEBUG_OBJECT (ogg, "%p has granulepos %" G_GINT64_FORMAT, pad, granule);
pad->current_granule = granule;
}
/* restart header packet count when seeing a b_o_s page;
* particularly useful following a seek or even following chain finding */
if (packet->b_o_s) {
GST_DEBUG_OBJECT (ogg, "b_o_s packet, resetting header packet count");
pad->map.n_header_packets_seen = 0;
if (!pad->map.have_headers) {
GST_DEBUG_OBJECT (ogg, "clearing header packets");
g_list_foreach (pad->map.headers, (GFunc) _ogg_packet_free, NULL);
g_list_free (pad->map.headers);
pad->map.headers = NULL;
}
}
/* Overload the value of b_o_s in ogg_packet with a flag whether or
* not this is a header packet. Maybe some day this could be cleaned
* up. */
packet->b_o_s = gst_ogg_stream_packet_is_header (&pad->map, packet);
if (!packet->b_o_s) {
GST_DEBUG ("found non-header packet");
pad->map.have_headers = TRUE;
if (pad->start_time == GST_CLOCK_TIME_NONE) {
gint64 duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
GST_DEBUG ("duration %" G_GINT64_FORMAT, duration);
if (duration != -1) {
pad->map.accumulated_granule += duration;
GST_DEBUG ("accumulated granule %" G_GINT64_FORMAT,
pad->map.accumulated_granule);
}
if (packet->granulepos != -1) {
ogg_int64_t start_granule;
gint64 granule;
granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
packet->granulepos);
if (granule > pad->map.accumulated_granule)
start_granule = granule - pad->map.accumulated_granule;
else
start_granule = 0;
pad->start_time = gst_ogg_stream_granule_to_time (&pad->map,
start_granule);
GST_DEBUG_OBJECT (ogg,
"start time %" GST_TIME_FORMAT " (%" GST_TIME_FORMAT ") for %s",
GST_TIME_ARGS (pad->start_time), GST_TIME_ARGS (pad->start_time),
gst_ogg_stream_get_media_type (&pad->map));
} else {
packet->granulepos = gst_ogg_stream_granule_to_granulepos (&pad->map,
pad->map.accumulated_granule, pad->keyframe_granule);
}
}
} else {
/* look for tags in header packet (before inc header count) */
gst_ogg_stream_extract_tags (&pad->map, packet);
pad->map.n_header_packets_seen++;
if (!pad->map.have_headers) {
pad->map.headers =
g_list_append (pad->map.headers, _ogg_packet_copy (packet));
GST_DEBUG ("keeping header packet %d", pad->map.n_header_packets_seen);
}
}
/* we know the start_time of the pad data, see if we
* can activate the complete chain if this is a dynamic
* chain. We need all the headers too for this. */
if (pad->start_time != GST_CLOCK_TIME_NONE && pad->map.have_headers) {
GstOggChain *chain = pad->chain;
/* check if complete chain has start time */
if (chain == ogg->building_chain) {
GstEvent *event = NULL;
if (ogg->resync) {
guint64 start_time;
GST_DEBUG_OBJECT (ogg, "need to resync");
/* when we need to resync after a seek, we wait until we have received
* timestamps on all streams */
start_time = gst_ogg_demux_collect_start_time (ogg, chain);
if (start_time != G_MAXUINT64) {
gint64 segment_time;
GstSegment segment;
GST_DEBUG_OBJECT (ogg, "start_time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
if (chain->segment_start < start_time)
segment_time =
(start_time - chain->segment_start) + chain->begin_time;
else
segment_time = chain->begin_time;
/* create the newsegment event we are going to send out */
gst_segment_init (&segment, GST_FORMAT_TIME);
GST_PUSH_LOCK (ogg);
if (!ogg->pullmode && ogg->push_state == PUSH_LINEAR2) {
/* if we are fast forwarding to the actual seek target,
ensure previous frames are clipped */
GST_DEBUG_OBJECT (ogg,
"Resynced, starting segment at %" GST_TIME_FORMAT
", start_time %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->push_seek_time_original_target),
GST_TIME_ARGS (start_time));
segment.rate = ogg->push_seek_rate;
segment.start = ogg->push_seek_time_original_target;
segment.stop = -1;
segment.time = ogg->push_seek_time_original_target;
event = gst_event_new_segment (&segment);
ogg->push_state = PUSH_PLAYING;
} else {
segment.rate = ogg->segment.rate;
segment.applied_rate = ogg->segment.applied_rate;
segment.start = start_time;
segment.stop = chain->segment_stop;
segment.time = segment_time;
event = gst_event_new_segment (&segment);
}
GST_PUSH_UNLOCK (ogg);
ogg->resync = FALSE;
}
} else {
/* see if we have enough info to activate the chain, we have enough info
* when all streams have a valid start time. */
if (gst_ogg_demux_collect_chain_info (ogg, chain)) {
GstSegment segment;
GST_DEBUG_OBJECT (ogg, "segment_start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_start));
GST_DEBUG_OBJECT (ogg, "segment_stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_stop));
GST_DEBUG_OBJECT (ogg, "segment_time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->begin_time));
/* create the newsegment event we are going to send out */
gst_segment_init (&segment, GST_FORMAT_TIME);
segment.rate = ogg->segment.rate;
segment.applied_rate = ogg->segment.applied_rate;
segment.start = chain->segment_start;
segment.stop = chain->segment_stop;
segment.time = chain->begin_time;
event = gst_event_new_segment (&segment);
}
}
if (event) {
gst_event_set_seqnum (event, ogg->seqnum);
gst_ogg_demux_activate_chain (ogg, chain, event);
ogg->building_chain = NULL;
}
}
}
/* if we are building a chain, store buffer for when we activate
* it. This path is taken if we operate in streaming mode. */
if (ogg->building_chain) {
/* bos packets where stored in the header list so we can discard
* them here*/
if (!packet->b_o_s)
ret = gst_ogg_demux_queue_data (pad, packet);
}
/* else we are completely streaming to the peer */
else {
ret = gst_ogg_demux_chain_peer (pad, packet, !ogg->pullmode);
}
return ret;
}
/* flush at most @npackets from the stream layer. All packets if
* @npackets is 0;
*/
static GstFlowReturn
gst_ogg_pad_stream_out (GstOggPad * pad, gint npackets)
{
GstFlowReturn result = GST_FLOW_OK;
gboolean done = FALSE;
GstOggDemux *ogg;
ogg = pad->ogg;
while (!done) {
int ret;
ogg_packet packet;
ret = ogg_stream_packetout (&pad->map.stream, &packet);
switch (ret) {
case 0:
GST_LOG_OBJECT (ogg, "packetout done");
done = TRUE;
break;
case -1:
GST_LOG_OBJECT (ogg, "packetout discont");
if (!pad->map.is_sparse) {
gst_ogg_chain_mark_discont (pad->chain);
} else {
gst_ogg_pad_mark_discont (pad);
}
break;
case 1:
GST_LOG_OBJECT (ogg, "packetout gave packet of size %ld", packet.bytes);
result = gst_ogg_pad_submit_packet (pad, &packet);
/* not linked is not a problem, it's possible that we are still
* collecting headers and that we don't have exposed the pads yet */
if (result == GST_FLOW_NOT_LINKED)
break;
else if (result <= GST_FLOW_EOS)
goto could_not_submit;
break;
default:
GST_WARNING_OBJECT (ogg,
"invalid return value %d for ogg_stream_packetout, resetting stream",
ret);
gst_ogg_pad_reset (pad);
break;
}
if (npackets > 0) {
npackets--;
done = (npackets == 0);
}
}
return result;
/* ERRORS */
could_not_submit:
{
GST_WARNING_OBJECT (ogg,
"could not submit packet for stream %08x, "
"error: %d", pad->map.serialno, result);
gst_ogg_pad_reset (pad);
return result;
}
}
static void
gst_ogg_demux_setup_bisection_bounds (GstOggDemux * ogg)
{
if (ogg->push_last_seek_time >= ogg->push_seek_time_target) {
GST_DEBUG_OBJECT (ogg, "We overshot by %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->push_last_seek_time - ogg->push_seek_time_target));
ogg->push_offset1 = ogg->push_last_seek_offset;
ogg->push_time1 = ogg->push_last_seek_time;
} else {
GST_DEBUG_OBJECT (ogg, "We undershot by %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->push_seek_time_target - ogg->push_last_seek_time));
ogg->push_offset0 = ogg->push_last_seek_offset;
ogg->push_time0 = ogg->push_last_seek_time;
}
}
static gint64
gst_ogg_demux_estimate_bisection_target (GstOggDemux * ogg)
{
gint64 best;
gint64 segment_bitrate;
/* we might not know the length of the stream in time,
so push_time1 might not be set */
GST_DEBUG_OBJECT (ogg,
"push time 1: %" GST_TIME_FORMAT ", dbytes %" G_GINT64_FORMAT,
GST_TIME_ARGS (ogg->push_time1), ogg->push_offset1 - ogg->push_offset0);
if (ogg->push_time1 == GST_CLOCK_TIME_NONE) {
GST_DEBUG_OBJECT (ogg,
"New segment to consider: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
", time %" GST_TIME_FORMAT " (open ended)", ogg->push_offset0,
ogg->push_offset1, GST_TIME_ARGS (ogg->push_time0));
if (ogg->push_last_seek_time == ogg->push_start_time) {
/* if we're at start and don't know the end time, we can't estimate
bitrate, so get the nominal declared bitrate as a failsafe, or some
random constant which will be discarded after we made a (probably
dire) first guess */
segment_bitrate = (ogg->bitrate > 0 ? ogg->bitrate : 1000);
} else {
segment_bitrate =
gst_util_uint64_scale (ogg->push_last_seek_offset - 0,
8 * GST_SECOND, ogg->push_last_seek_time - ogg->push_start_time);
}
best =
ogg->push_offset0 +
gst_util_uint64_scale (ogg->push_seek_time_target - ogg->push_time0,
segment_bitrate, 8 * GST_SECOND);
} else {
GST_DEBUG_OBJECT (ogg,
"New segment to consider: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
", time %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, ogg->push_offset0,
ogg->push_offset1, GST_TIME_ARGS (ogg->push_time0),
GST_TIME_ARGS (ogg->push_time1));
if (ogg->push_time0 == ogg->push_time1) {
best = ogg->push_offset0;
} else {
segment_bitrate =
gst_util_uint64_scale (ogg->push_offset1 - ogg->push_offset0,
8 * GST_SECOND, ogg->push_time1 - ogg->push_time0);
GST_DEBUG_OBJECT (ogg,
"Local bitrate on the %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT
" segment: %" G_GINT64_FORMAT, GST_TIME_ARGS (ogg->push_time0),
GST_TIME_ARGS (ogg->push_time1), segment_bitrate);
best =
ogg->push_offset0 +
gst_util_uint64_scale (ogg->push_seek_time_target - ogg->push_time0,
segment_bitrate, 8 * GST_SECOND);
}
}
/* offset by typical page size */
best -= CHUNKSIZE;
if (best < ogg->push_offset0)
best = ogg->push_offset0;
if (best < 0)
best = 0;
return best;
}
static void
gst_ogg_demux_record_keyframe_time (GstOggDemux * ogg, GstOggPad * pad,
ogg_int64_t granpos)
{
gint64 kf_granule;
GstClockTime kf_time;
kf_granule = gst_ogg_stream_granulepos_to_key_granule (&pad->map, granpos);
kf_time = gst_ogg_stream_granule_to_time (&pad->map, kf_granule);
pad->push_kf_time = kf_time;
}
/* returns the earliest keyframe time for all non sparse pads in the chain,
* if known, and GST_CLOCK_TIME_NONE if not */
static GstClockTime
gst_ogg_demux_get_earliest_keyframe_time (GstOggDemux * ogg)
{
GstClockTime t = GST_CLOCK_TIME_NONE;
GstOggChain *chain = ogg->building_chain;
int i;
if (!chain) {
GST_WARNING_OBJECT (ogg, "No chain!");
return GST_CLOCK_TIME_NONE;
}
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.is_sparse)
continue;
if (pad->push_kf_time == GST_CLOCK_TIME_NONE)
return GST_CLOCK_TIME_NONE;
if (t == GST_CLOCK_TIME_NONE || pad->push_kf_time < t)
t = pad->push_kf_time;
}
return t;
}
/* MUST be called with the push lock locked, and will unlock it
regardless of return value. */
static GstFlowReturn
gst_ogg_demux_seek_back_after_push_duration_check_unlock (GstOggDemux * ogg)
{
GstEvent *event;
/* Get the delayed event, if any */
event = ogg->push_mode_seek_delayed_event;
ogg->push_mode_seek_delayed_event = NULL;
ogg->push_state = PUSH_PLAYING;
GST_PUSH_UNLOCK (ogg);
if (event) {
/* If there is one, perform it */
gst_ogg_demux_perform_seek_push (ogg, event);
} else {
/* If there wasn't, seek back at start to start normal playback */
GST_INFO_OBJECT (ogg, "Seeking back to 0 after duration check");
event = gst_event_new_seek (1.0, GST_FORMAT_BYTES,
GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, 1, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
if (!gst_pad_push_event (ogg->sinkpad, event)) {
GST_WARNING_OBJECT (ogg, "Failed seeking back to start");
return GST_FLOW_ERROR;
}
}
return GST_FLOW_OK;
}
static gboolean
gst_ogg_pad_handle_push_mode_state (GstOggPad * pad, ogg_page * page)
{
GstOggDemux *ogg = pad->ogg;
ogg_int64_t granpos = ogg_page_granulepos (page);
GST_PUSH_LOCK (ogg);
if (granpos >= 0) {
if (ogg->push_start_time == GST_CLOCK_TIME_NONE) {
ogg->push_start_time =
gst_ogg_stream_get_start_time_for_granulepos (&pad->map, granpos);
GST_DEBUG_OBJECT (ogg, "Stream start time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->push_start_time));
}
ogg->push_time_offset =
gst_ogg_stream_get_end_time_for_granulepos (&pad->map, granpos);
if (ogg->push_time_offset > 0) {
GST_DEBUG_OBJECT (ogg, "Bitrate since start: %" G_GUINT64_FORMAT,
gst_util_uint64_scale (ogg->push_byte_offset, 8 * GST_SECOND,
ogg->push_time_offset));
}
if (ogg->push_state == PUSH_DURATION) {
GstClockTime t =
gst_ogg_stream_get_end_time_for_granulepos (&pad->map, granpos);
if (ogg->total_time == GST_CLOCK_TIME_NONE || t > ogg->total_time) {
GST_DEBUG_OBJECT (ogg, "New total time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (t));
ogg->total_time = t;
ogg->push_time_length = t;
}
/* If we were determining the duration of the stream, we're now done,
and can get back to sending the original event we delayed.
We stop a bit before the end of the stream, as if we get a EOS
event and there is a queue2 upstream (such as when using playbin2),
it will pause the task *after* we come back from the EOS handler,
so we cannot prevent the pausing by issuing a seek. */
if (ogg->push_byte_offset + EOS_AVOIDANCE_THRESHOLD >=
ogg->push_byte_length) {
GstMessage *message;
GstFlowReturn res;
/* tell the pipeline we've just found out the duration */
ogg->push_time_length = ogg->total_time;
GST_INFO_OBJECT (ogg, "New duration found: %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->total_time));
message =
gst_message_new_duration (GST_OBJECT (ogg), GST_FORMAT_TIME,
ogg->total_time);
gst_element_post_message (GST_ELEMENT (ogg), message);
GST_DEBUG_OBJECT (ogg,
"We're close enough to the end, and we're scared "
"to get too close, seeking back to start");
res = gst_ogg_demux_seek_back_after_push_duration_check_unlock (ogg);
if (res != GST_FLOW_OK)
return res;
return GST_FLOW_SKIP_PUSH;
} else {
GST_PUSH_UNLOCK (ogg);
}
return GST_FLOW_SKIP_PUSH;
}
}
/* if we're seeking, look at time, and decide what to do */
if (ogg->push_state != PUSH_PLAYING && ogg->push_state != PUSH_LINEAR2) {
GstClockTime t;
gint64 best = -1;
GstEvent *sevent;
int res;
gboolean close_enough;
/* ignore -1 granpos when seeking, we want to sync on a real granpos */
if (granpos < 0) {
GST_PUSH_UNLOCK (ogg);
if (ogg_stream_pagein (&pad->map.stream, page) != 0)
goto choked;
return GST_FLOW_SKIP_PUSH;
}
t = gst_ogg_stream_get_end_time_for_granulepos (&pad->map, granpos);
if (ogg->push_state == PUSH_BISECT1 || ogg->push_state == PUSH_BISECT2) {
GstClockTime sync_time;
if (pad->push_sync_time == GST_CLOCK_TIME_NONE)
pad->push_sync_time = t;
GST_DEBUG_OBJECT (ogg, "Got timestamp %" GST_TIME_FORMAT " for %s",
GST_TIME_ARGS (t), gst_ogg_stream_get_media_type (&pad->map));
sync_time = gst_ogg_demux_collect_sync_time (ogg, ogg->building_chain);
if (sync_time == GST_CLOCK_TIME_NONE) {
GST_PUSH_UNLOCK (ogg);
GST_DEBUG_OBJECT (ogg,
"Not enough timing info collected for sync, waiting for more");
if (ogg_stream_pagein (&pad->map.stream, page) != 0)
goto choked;
return GST_FLOW_SKIP_PUSH;
}
ogg->push_last_seek_time = sync_time;
GST_DEBUG_OBJECT (ogg,
"Bisection just seeked at %" G_GINT64_FORMAT ", time %"
GST_TIME_FORMAT ", target was %" GST_TIME_FORMAT,
ogg->push_last_seek_offset,
GST_TIME_ARGS (ogg->push_last_seek_time),
GST_TIME_ARGS (ogg->push_seek_time_target));
if (ogg->push_time1 != GST_CLOCK_TIME_NONE) {
GST_DEBUG_OBJECT (ogg,
"Interval was %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT " (%"
G_GINT64_FORMAT "), time %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT
" (%" GST_TIME_FORMAT ")", ogg->push_offset0, ogg->push_offset1,
ogg->push_offset1 - ogg->push_offset0,
GST_TIME_ARGS (ogg->push_time0), GST_TIME_ARGS (ogg->push_time1),
GST_TIME_ARGS (ogg->push_time1 - ogg->push_time0));
} else {
GST_DEBUG_OBJECT (ogg,
"Interval was %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT " (%"
G_GINT64_FORMAT "), time %" GST_TIME_FORMAT " - unknown",
ogg->push_offset0, ogg->push_offset1,
ogg->push_offset1 - ogg->push_offset0,
GST_TIME_ARGS (ogg->push_time0));
}
gst_ogg_demux_setup_bisection_bounds (ogg);
best = gst_ogg_demux_estimate_bisection_target (ogg);
if (ogg->push_seek_time_target == 0) {
GST_DEBUG_OBJECT (ogg, "Seeking to 0, deemed close enough");
close_enough = (ogg->push_last_seek_time == 0);
} else {
/* TODO: make this dependent on framerate ? */
GstClockTime threshold = GST_SECOND / 2;
/* We want to be within half a second before the target */
if (threshold > ogg->push_seek_time_target)
threshold = ogg->push_seek_time_target;
close_enough = ogg->push_last_seek_time < ogg->push_seek_time_target
&& ogg->push_last_seek_time >=
ogg->push_seek_time_target - threshold;
GST_DEBUG_OBJECT (ogg,
"testing if we're close enough: %" GST_TIME_FORMAT " <= %"
GST_TIME_FORMAT " < %" GST_TIME_FORMAT " ? %s",
GST_TIME_ARGS (ogg->push_seek_time_target - threshold),
GST_TIME_ARGS (ogg->push_last_seek_time),
GST_TIME_ARGS (ogg->push_seek_time_target),
close_enough ? "Yes" : "No");
}
if (close_enough || best == ogg->push_last_seek_offset) {
if (ogg->push_state == PUSH_BISECT1) {
/* we now know the time segment we'll have to search for
the second bisection */
ogg->push_time0 = ogg->push_start_time;
ogg->push_offset0 = 0;
GST_DEBUG_OBJECT (ogg,
"Seek to %" GST_TIME_FORMAT
" (%lx) done, now gathering pages for all non-sparse streams",
GST_TIME_ARGS (ogg->push_seek_time_target), (long) granpos);
ogg->push_state = PUSH_LINEAR1;
} else {
/* If we're asked for an accurate seek, we'll go forward till
we get to the original seek target time, else we'll just drop
here at the keyframe */
if (ogg->push_seek_flags & GST_SEEK_FLAG_ACCURATE) {
GST_INFO_OBJECT (ogg,
"Seek to keyframe at %" GST_TIME_FORMAT " done (we're at %"
GST_TIME_FORMAT "), skipping to original target (%"
GST_TIME_FORMAT ")",
GST_TIME_ARGS (ogg->push_seek_time_target),
GST_TIME_ARGS (sync_time),
GST_TIME_ARGS (ogg->push_seek_time_original_target));
ogg->push_state = PUSH_LINEAR2;
} else {
GST_DEBUG_OBJECT (ogg, "Seek to keyframe done, playing");
/* we're synced to the seek target, so flush stream and stuff
any queued pages into the stream so we start decoding there */
ogg->push_state = PUSH_PLAYING;
}
GST_INFO_OBJECT (ogg, "Bisection needed %d + %d steps",
ogg->push_bisection_steps[0], ogg->push_bisection_steps[1]);
}
}
} else if (ogg->push_state == PUSH_LINEAR1) {
if (pad->push_kf_time == GST_CLOCK_TIME_NONE) {
GstClockTime earliest_keyframe_time;
gst_ogg_demux_record_keyframe_time (ogg, pad, granpos);
GST_DEBUG_OBJECT (ogg,
"Previous keyframe for %s stream at %" GST_TIME_FORMAT,
gst_ogg_stream_get_media_type (&pad->map),
GST_TIME_ARGS (pad->push_kf_time));
earliest_keyframe_time = gst_ogg_demux_get_earliest_keyframe_time (ogg);
if (earliest_keyframe_time != GST_CLOCK_TIME_NONE) {
GST_DEBUG_OBJECT (ogg,
"All non sparse streams now have a previous keyframe time,"
"bisecting again to %" GST_TIME_FORMAT,
GST_TIME_ARGS (earliest_keyframe_time));
ogg->push_seek_time_target = earliest_keyframe_time;
ogg->push_state = PUSH_BISECT2;
best = gst_ogg_demux_estimate_bisection_target (ogg);
}
}
}
if (ogg->push_state == PUSH_BISECT1 || ogg->push_state == PUSH_BISECT2) {
gint i;
ogg_sync_reset (&ogg->sync);
for (i = 0; i < ogg->building_chain->streams->len; i++) {
GstOggPad *pad =
g_array_index (ogg->building_chain->streams, GstOggPad *, i);
pad->push_sync_time = GST_CLOCK_TIME_NONE;
ogg_stream_reset (&pad->map.stream);
}
GST_DEBUG_OBJECT (ogg,
"seeking to %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT, best,
(gint64) - 1);
/* do seek */
g_assert (best != -1);
ogg->push_bisection_steps[ogg->push_state == PUSH_BISECT2 ? 1 : 0]++;
sevent =
gst_event_new_seek (ogg->push_seek_rate, GST_FORMAT_BYTES,
ogg->push_seek_flags, GST_SEEK_TYPE_SET, best,
GST_SEEK_TYPE_NONE, -1);
GST_PUSH_UNLOCK (ogg);
res = gst_pad_push_event (ogg->sinkpad, sevent);
if (!res) {
/* We failed to send the seek event, notify the pipeline */
GST_ELEMENT_ERROR (ogg, RESOURCE, SEEK, (NULL), ("Failed to seek"));
return GST_FLOW_ERROR;
}
return GST_FLOW_SKIP_PUSH;
}
if (ogg->push_state != PUSH_PLAYING) {
GST_PUSH_UNLOCK (ogg);
return GST_FLOW_SKIP_PUSH;
}
}
GST_PUSH_UNLOCK (ogg);
return GST_FLOW_OK;
choked:
{
GST_WARNING_OBJECT (ogg,
"ogg stream choked on page (serial %08x), "
"resetting stream", pad->map.serialno);
gst_ogg_pad_reset (pad);
/* we continue to recover */
return GST_FLOW_SKIP_PUSH;
}
}
/* submit a page to an oggpad, this function will then submit all
* the packets in the page.
*/
static GstFlowReturn
gst_ogg_pad_submit_page (GstOggPad * pad, ogg_page * page)
{
GstFlowReturn result = GST_FLOW_OK;
GstOggDemux *ogg;
gboolean continued = FALSE;
ogg = pad->ogg;
/* for negative rates we read pages backwards and must therefore be careful
* with continued pages */
if (ogg->segment.rate < 0.0) {
gint npackets;
continued = ogg_page_continued (page);
/* number of completed packets in the page */
npackets = ogg_page_packets (page);
if (!continued) {
/* page is not continued so it contains at least one packet start. It's
* possible that no packet ends on this page (npackets == 0). In that
* case, the next (continued) page(s) we kept contain the remainder of the
* packets. We mark npackets=1 to make us start decoding the pages in the
* remainder of the algorithm. */
if (npackets == 0)
npackets = 1;
}
GST_LOG_OBJECT (ogg, "continued: %d, %d packets", continued, npackets);
if (npackets == 0) {
GST_LOG_OBJECT (ogg, "no decodable packets, we need a previous page");
goto done;
}
}
/* keep track of time in push mode */
if (!ogg->pullmode) {
result = gst_ogg_pad_handle_push_mode_state (pad, page);
if (result == GST_FLOW_SKIP_PUSH)
return GST_FLOW_OK;
if (result != GST_FLOW_OK)
return result;
}
if (ogg_stream_pagein (&pad->map.stream, page) != 0)
goto choked;
/* flush all packets in the stream layer, this might not give a packet if
* the page had no packets finishing on the page (npackets == 0). */
result = gst_ogg_pad_stream_out (pad, 0);
if (pad->continued) {
ogg_packet packet;
/* now send the continued pages to the stream layer */
while (pad->continued) {
ogg_page *p = (ogg_page *) pad->continued->data;
GST_LOG_OBJECT (ogg, "submitting continued page %p", p);
if (ogg_stream_pagein (&pad->map.stream, p) != 0)
goto choked;
pad->continued = g_list_delete_link (pad->continued, pad->continued);
/* free the page */
gst_ogg_page_free (p);
}
GST_LOG_OBJECT (ogg, "flushing last continued packet");
/* flush 1 continued packet in the stream layer */
result = gst_ogg_pad_stream_out (pad, 1);
/* flush all remaining packets, we pushed them in the previous round.
* We don't use _reset() because we still want to get the discont when
* we submit a next page. */
while (ogg_stream_packetout (&pad->map.stream, &packet) != 0);
}
done:
/* keep continued pages (only in reverse mode) */
if (continued) {
ogg_page *p = gst_ogg_page_copy (page);
GST_LOG_OBJECT (ogg, "keeping continued page %p", p);
pad->continued = g_list_prepend (pad->continued, p);
}
return result;
choked:
{
GST_WARNING_OBJECT (ogg,
"ogg stream choked on page (serial %08x), "
"resetting stream", pad->map.serialno);
gst_ogg_pad_reset (pad);
/* we continue to recover */
return GST_FLOW_OK;
}
}
static GstOggChain *
gst_ogg_chain_new (GstOggDemux * ogg)
{
GstOggChain *chain = g_slice_new0 (GstOggChain);
GST_DEBUG_OBJECT (ogg, "creating new chain %p", chain);
chain->ogg = ogg;
chain->offset = -1;
chain->bytes = -1;
chain->have_bos = FALSE;
chain->streams = g_array_new (FALSE, TRUE, sizeof (GstOggPad *));
chain->begin_time = GST_CLOCK_TIME_NONE;
chain->segment_start = GST_CLOCK_TIME_NONE;
chain->segment_stop = GST_CLOCK_TIME_NONE;
chain->total_time = GST_CLOCK_TIME_NONE;
return chain;
}
static void
gst_ogg_chain_free (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_object_unref (pad);
}
g_array_free (chain->streams, TRUE);
g_slice_free (GstOggChain, chain);
}
static void
gst_ogg_pad_mark_discont (GstOggPad * pad)
{
pad->discont = TRUE;
pad->map.last_size = 0;
}
static void
gst_ogg_chain_mark_discont (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_ogg_pad_mark_discont (pad);
}
}
static void
gst_ogg_chain_reset (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_ogg_pad_reset (pad);
}
}
static GstOggPad *
gst_ogg_chain_new_stream (GstOggChain * chain, guint32 serialno)
{
GstOggPad *ret;
GstTagList *list;
gchar *name;
GST_DEBUG_OBJECT (chain->ogg,
"creating new stream %08x in chain %p", serialno, chain);
name = g_strdup_printf ("src_%08x", serialno);
ret = g_object_new (GST_TYPE_OGG_PAD, "name", name, NULL);
g_free (name);
/* we own this one */
gst_object_ref_sink (ret);
GST_PAD_DIRECTION (ret) = GST_PAD_SRC;
gst_ogg_pad_mark_discont (ret);
ret->chain = chain;
ret->ogg = chain->ogg;
ret->map.serialno = serialno;
if (ogg_stream_init (&ret->map.stream, serialno) != 0)
goto init_failed;
/* FIXME: either do something with it or remove it */
list = gst_tag_list_new_empty ();
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serialno,
NULL);
gst_tag_list_free (list);
GST_DEBUG_OBJECT (chain->ogg,
"created new ogg src %p for stream with serial %08x", ret, serialno);
g_array_append_val (chain->streams, ret);
gst_pad_set_active (GST_PAD_CAST (ret), TRUE);
return ret;
/* ERRORS */
init_failed:
{
GST_ERROR ("Could not initialize ogg_stream struct for serial %08x",
serialno);
gst_object_unref (ret);
return NULL;
}
}
static GstOggPad *
gst_ogg_chain_get_stream (GstOggChain * chain, guint32 serialno)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.serialno == serialno)
return pad;
}
return NULL;
}
static gboolean
gst_ogg_chain_has_stream (GstOggChain * chain, guint32 serialno)
{
return gst_ogg_chain_get_stream (chain, serialno) != NULL;
}
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
static GstStaticPadTemplate ogg_demux_src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src_%08x",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate ogg_demux_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/ogg; application/x-annodex")
);
static void gst_ogg_demux_finalize (GObject * object);
static GstFlowReturn gst_ogg_demux_read_chain (GstOggDemux * ogg,
GstOggChain ** chain);
static GstFlowReturn gst_ogg_demux_read_end_chain (GstOggDemux * ogg,
GstOggChain * chain);
static gboolean gst_ogg_demux_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static void gst_ogg_demux_loop (GstOggPad * pad);
static GstFlowReturn gst_ogg_demux_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_ogg_demux_sink_activate (GstPad * sinkpad,
GstObject * parent);
static gboolean gst_ogg_demux_sink_activate_pull (GstPad * sinkpad,
GstObject * parent, gboolean active);
static gboolean gst_ogg_demux_sink_activate_push (GstPad * sinkpad,
GstObject * parent, gboolean active);
static GstStateChangeReturn gst_ogg_demux_change_state (GstElement * element,
GstStateChange transition);
static void gst_ogg_print (GstOggDemux * demux);
#define gst_ogg_demux_parent_class parent_class
G_DEFINE_TYPE (GstOggDemux, gst_ogg_demux, GST_TYPE_ELEMENT);
static void
gst_ogg_demux_class_init (GstOggDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gst_element_class_set_details_simple (gstelement_class,
"Ogg demuxer", "Codec/Demuxer",
"demux ogg streams (info about ogg: http://xiph.org)",
"Wim Taymans <wim@fluendo.com>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&ogg_demux_sink_template_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&ogg_demux_src_template_factory));
gstelement_class->change_state = gst_ogg_demux_change_state;
gstelement_class->send_event = gst_ogg_demux_receive_event;
gobject_class->finalize = gst_ogg_demux_finalize;
}
static void
gst_ogg_demux_init (GstOggDemux * ogg)
{
/* create the sink pad */
ogg->sinkpad =
gst_pad_new_from_static_template (&ogg_demux_sink_template_factory,
"sink");
gst_pad_set_event_function (ogg->sinkpad, gst_ogg_demux_sink_event);
gst_pad_set_chain_function (ogg->sinkpad, gst_ogg_demux_chain);
gst_pad_set_activate_function (ogg->sinkpad, gst_ogg_demux_sink_activate);
gst_pad_set_activatepull_function (ogg->sinkpad,
gst_ogg_demux_sink_activate_pull);
gst_pad_set_activatepush_function (ogg->sinkpad,
gst_ogg_demux_sink_activate_push);
gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
ogg->chain_lock = g_mutex_new ();
ogg->push_lock = g_mutex_new ();
ogg->chains = g_array_new (FALSE, TRUE, sizeof (GstOggChain *));
ogg->newsegment = NULL;
}
static void
gst_ogg_demux_finalize (GObject * object)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (object);
g_array_free (ogg->chains, TRUE);
g_mutex_free (ogg->chain_lock);
g_mutex_free (ogg->push_lock);
ogg_sync_clear (&ogg->sync);
if (ogg->newsegment)
gst_event_unref (ogg->newsegment);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_ogg_demux_reset_streams (GstOggDemux * ogg)
{
GstOggChain *chain;
guint i;
chain = ogg->current_chain;
if (chain == NULL)
return;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
stream->start_time = -1;
stream->map.accumulated_granule = 0;
}
ogg->building_chain = chain;
GST_DEBUG_OBJECT (ogg, "Resetting current chain");
ogg->current_chain = NULL;
ogg->resync = TRUE;
}
static gboolean
gst_ogg_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_ogg_demux_send_event (ogg, event);
break;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (ogg, "got a flush stop event");
ogg_sync_reset (&ogg->sync);
res = gst_ogg_demux_send_event (ogg, event);
if (ogg->pullmode || ogg->push_state != PUSH_DURATION) {
/* it's starting to feel reaaaally dirty :(
if we're on a spliced seek to get duration, don't reset streams,
we'll need them for the delayed seek */
gst_ogg_demux_reset_streams (ogg);
}
break;
case GST_EVENT_SEGMENT:
GST_DEBUG_OBJECT (ogg, "got a new segment event");
{
GstSegment segment;
gst_event_copy_segment (event, &segment);
if (segment.format == GST_FORMAT_BYTES) {
GST_PUSH_LOCK (ogg);
ogg->push_byte_offset = segment.start;
ogg->push_last_seek_offset = segment.start;
GST_PUSH_UNLOCK (ogg);
} else {
GST_WARNING_OBJECT (ogg, "unexpected segment format: %s",
gst_format_get_name (segment.format));
}
}
gst_event_unref (event);
res = TRUE;
break;
case GST_EVENT_EOS:
{
GST_DEBUG_OBJECT (ogg, "got an EOS event");
#if 0
/* This would be what is needed (recover from EOS by going on to
the next step (issue the delayed seek)), but it does not work
if there is a queue2 upstream - see more details comment in
gst_ogg_pad_submit_page.
If I could find a way to bypass queue2 behavior, this should
be enabled. */
GST_PUSH_LOCK (ogg);
if (ogg->push_state == PUSH_DURATION) {
GST_DEBUG_OBJECT (ogg, "Got EOS while determining length");
res = gst_ogg_demux_seek_back_after_push_duration_check_unlock (ogg);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (ogg, "Error seeking back after duration check: %d",
res);
}
break;
}
GST_PUSH_UNLOCK (ogg);
#endif
res = gst_ogg_demux_send_event (ogg, event);
if (ogg->current_chain == NULL) {
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
("can't get first chain"));
}
break;
}
default:
res = gst_ogg_demux_send_event (ogg, event);
break;
}
return res;
}
/* submit the given buffer to the ogg sync */
static GstFlowReturn
gst_ogg_demux_submit_buffer (GstOggDemux * ogg, GstBuffer * buffer)
{
gsize size;
gchar *oggbuffer;
GstFlowReturn ret = GST_FLOW_OK;
size = gst_buffer_get_size (buffer);
GST_DEBUG_OBJECT (ogg, "submitting %" G_GSIZE_FORMAT " bytes", size);
if (G_UNLIKELY (size == 0))
goto done;
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
if (G_UNLIKELY (oggbuffer == NULL))
goto no_buffer;
gst_buffer_extract (buffer, 0, oggbuffer, size);
if (G_UNLIKELY (ogg_sync_wrote (&ogg->sync, size) < 0))
goto write_failed;
if (!ogg->pullmode) {
GST_PUSH_LOCK (ogg);
ogg->push_byte_offset += size;
GST_PUSH_UNLOCK (ogg);
}
done:
gst_buffer_unref (buffer);
return ret;
/* ERRORS */
no_buffer:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("failed to get ogg sync buffer"));
ret = GST_FLOW_ERROR;
goto done;
}
write_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE, (NULL),
("failed to write %" G_GSIZE_FORMAT " bytes to the sync buffer", size));
ret = GST_FLOW_ERROR;
goto done;
}
}
/* in random access mode this code updates the current read position
* and resets the ogg sync buffer so that the next read will happen
* from this new location.
*/
static void
gst_ogg_demux_seek (GstOggDemux * ogg, gint64 offset)
{
GST_LOG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, offset);
ogg->offset = offset;
ogg->read_offset = offset;
ogg_sync_reset (&ogg->sync);
}
/* read more data from the current offset and submit to
* the ogg sync layer.
*/
static GstFlowReturn
gst_ogg_demux_get_data (GstOggDemux * ogg, gint64 end_offset)
{
GstFlowReturn ret;
GstBuffer *buffer;
GST_LOG_OBJECT (ogg,
"get data %" G_GINT64_FORMAT " %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
ogg->read_offset, ogg->length, end_offset);
if (end_offset > 0 && ogg->read_offset >= end_offset)
goto boundary_reached;
if (ogg->read_offset == ogg->length)
goto eos;
ret = gst_pad_pull_range (ogg->sinkpad, ogg->read_offset, CHUNKSIZE, &buffer);
if (ret != GST_FLOW_OK)
goto error;
ogg->read_offset += gst_buffer_get_size (buffer);
ret = gst_ogg_demux_submit_buffer (ogg, buffer);
return ret;
/* ERROR */
boundary_reached:
{
GST_LOG_OBJECT (ogg, "reached boundary");
return GST_FLOW_LIMIT;
}
eos:
{
GST_LOG_OBJECT (ogg, "reached EOS");
return GST_FLOW_EOS;
}
error:
{
GST_WARNING_OBJECT (ogg, "got %d (%s) from pull range", ret,
gst_flow_get_name (ret));
return ret;
}
}
/* Read the next page from the current offset.
* boundary: number of bytes ahead we allow looking for;
* -1 if no boundary
*
* @offset will contain the offset the next page starts at when this function
* returns GST_FLOW_OK.
*
* GST_FLOW_EOS is returned on EOS.
*
* GST_FLOW_LIMIT is returned when we did not find a page before the
* boundary. If @boundary is -1, this is never returned.
*
* Any other error returned while retrieving data from the peer is returned as
* is.
*/
static GstFlowReturn
gst_ogg_demux_get_next_page (GstOggDemux * ogg, ogg_page * og,
gint64 boundary, gint64 * offset)
{
gint64 end_offset = -1;
GstFlowReturn ret;
GST_LOG_OBJECT (ogg,
"get next page, current offset %" G_GINT64_FORMAT ", bytes boundary %"
G_GINT64_FORMAT, ogg->offset, boundary);
if (boundary >= 0)
end_offset = ogg->offset + boundary;
while (TRUE) {
glong more;
if (end_offset > 0 && ogg->offset >= end_offset)
goto boundary_reached;
more = ogg_sync_pageseek (&ogg->sync, og);
GST_LOG_OBJECT (ogg, "pageseek gave %ld", more);
if (more < 0) {
/* skipped n bytes */
ogg->offset -= more;
GST_LOG_OBJECT (ogg, "skipped %ld bytes, offset %" G_GINT64_FORMAT,
more, ogg->offset);
} else if (more == 0) {
/* we need more data */
if (boundary == 0)
goto boundary_reached;
GST_LOG_OBJECT (ogg, "need more data");
ret = gst_ogg_demux_get_data (ogg, end_offset);
if (ret != GST_FLOW_OK)
break;
} else {
gint64 res_offset = ogg->offset;
/* got a page. Return the offset at the page beginning,
advance the internal offset past the page end */
if (offset)
*offset = res_offset;
ret = GST_FLOW_OK;
ogg->offset += more;
GST_LOG_OBJECT (ogg,
"got page at %" G_GINT64_FORMAT ", serial %08x, end at %"
G_GINT64_FORMAT ", granule %" G_GINT64_FORMAT, res_offset,
ogg_page_serialno (og), ogg->offset,
(gint64) ogg_page_granulepos (og));
break;
}
}
GST_LOG_OBJECT (ogg, "returning %d", ret);
return ret;
/* ERRORS */
boundary_reached:
{
GST_LOG_OBJECT (ogg,
"offset %" G_GINT64_FORMAT " >= end_offset %" G_GINT64_FORMAT,
ogg->offset, end_offset);
return GST_FLOW_LIMIT;
}
}
/* from the current offset, find the previous page, seeking backwards
* until we find the page.
*/
static GstFlowReturn
gst_ogg_demux_get_prev_page (GstOggDemux * ogg, ogg_page * og, gint64 * offset)
{
GstFlowReturn ret;
gint64 begin = ogg->offset;
gint64 end = begin;
gint64 cur_offset = -1;
GST_LOG_OBJECT (ogg, "getting page before %" G_GINT64_FORMAT, begin);
while (cur_offset == -1) {
begin -= CHUNKSIZE;
if (begin < 0)
begin = 0;
/* seek CHUNKSIZE back */
gst_ogg_demux_seek (ogg, begin);
/* now continue reading until we run out of data, if we find a page
* start, we save it. It might not be the final page as there could be
* another page after this one. */
while (ogg->offset < end) {
gint64 new_offset;
ret =
gst_ogg_demux_get_next_page (ogg, og, end - ogg->offset, &new_offset);
/* we hit the upper limit, offset contains the last page start */
if (ret == GST_FLOW_LIMIT) {
GST_LOG_OBJECT (ogg, "hit limit");
break;
}
/* something went wrong */
if (ret == GST_FLOW_EOS) {
new_offset = 0;
GST_LOG_OBJECT (ogg, "got unexpected");
} else if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "got error %d", ret);
return ret;
}
GST_LOG_OBJECT (ogg, "found page at %" G_GINT64_FORMAT, new_offset);
/* offset is next page start */
cur_offset = new_offset;
}
}
GST_LOG_OBJECT (ogg, "found previous page at %" G_GINT64_FORMAT, cur_offset);
/* we have the offset. Actually snork and hold the page now */
gst_ogg_demux_seek (ogg, cur_offset);
ret = gst_ogg_demux_get_next_page (ogg, og, -1, NULL);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (ogg, "can't get last page at %" G_GINT64_FORMAT,
cur_offset);
/* this shouldn't be possible */
return ret;
}
if (offset)
*offset = cur_offset;
return ret;
}
static gboolean
gst_ogg_demux_deactivate_current_chain (GstOggDemux * ogg)
{
gint i;
GstOggChain *chain = ogg->current_chain;
if (chain == NULL)
return TRUE;
GST_DEBUG_OBJECT (ogg, "deactivating chain %p", chain);
/* send EOS on all the pads */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
GstEvent *event;
if (!pad->added)
continue;
event = gst_event_new_eos ();
gst_event_set_seqnum (event, ogg->seqnum);
gst_pad_push_event (GST_PAD_CAST (pad), event);
GST_DEBUG_OBJECT (ogg, "removing pad %" GST_PTR_FORMAT, pad);
/* deactivate first */
gst_pad_set_active (GST_PAD_CAST (pad), FALSE);
gst_element_remove_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
pad->added = FALSE;
}
/* With push mode seeking implemented, we can now seek back to the chain,
so we do not destroy it */
GST_DEBUG_OBJECT (ogg, "Resetting current chain");
ogg->current_chain = NULL;
return TRUE;
}
GstCaps *
gst_ogg_demux_set_header_on_caps (GstOggDemux * ogg, GstCaps * caps,
GList * headers)
{
GstStructure *structure;
GValue array = { 0 };
GST_LOG_OBJECT (ogg, "caps: %" GST_PTR_FORMAT, caps);
if (G_UNLIKELY (!caps))
return NULL;
if (G_UNLIKELY (!headers))
return NULL;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
g_value_init (&array, GST_TYPE_ARRAY);
while (headers) {
GValue value = { 0 };
GstBuffer *buffer;
ogg_packet *op = headers->data;
g_assert (op);
buffer = gst_buffer_new_and_alloc (op->bytes);
if (op->bytes)
gst_buffer_fill (buffer, 0, op->packet, op->bytes);
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_IN_CAPS);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_take_buffer (&value, buffer);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
headers = headers->next;
}
gst_structure_set_value (structure, "streamheader", &array);
g_value_unset (&array);
GST_LOG_OBJECT (ogg, "here are the newly set caps: %" GST_PTR_FORMAT, caps);
return caps;
}
static void
gst_ogg_demux_push_queued_buffers (GstOggDemux * ogg, GstOggPad * pad)
{
GList *walk;
/* push queued packets */
for (walk = pad->map.queued; walk; walk = g_list_next (walk)) {
ogg_packet *p = walk->data;
gst_ogg_demux_chain_peer (pad, p, TRUE);
_ogg_packet_free (p);
}
/* and free the queued buffers */
g_list_free (pad->map.queued);
pad->map.queued = NULL;
}
static gboolean
gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
GstEvent * event)
{
gint i;
gint bitrate, idx_bitrate;
g_return_val_if_fail (chain != NULL, FALSE);
if (chain == ogg->current_chain) {
if (event)
gst_event_unref (event);
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_ogg_demux_push_queued_buffers (ogg, pad);
}
return TRUE;
}
GST_DEBUG_OBJECT (ogg, "activating chain %p", chain);
bitrate = idx_bitrate = 0;
/* first add the pads */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad;
pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.idx_bitrate)
idx_bitrate = MAX (idx_bitrate, pad->map.idx_bitrate);
bitrate += pad->map.bitrate;
/* mark discont */
gst_ogg_pad_mark_discont (pad);
pad->last_ret = GST_FLOW_OK;
if (pad->map.is_skeleton || pad->added
|| !gst_pad_has_current_caps (GST_PAD_CAST (pad)))
continue;
GST_DEBUG_OBJECT (ogg, "adding pad %" GST_PTR_FORMAT, pad);
/* activate first */
gst_pad_set_active (GST_PAD_CAST (pad), TRUE);
gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
pad->added = TRUE;
}
/* prefer the index bitrate over the ones encoded in the streams */
ogg->bitrate = (idx_bitrate ? idx_bitrate : bitrate);
/* after adding the new pads, remove the old pads */
gst_ogg_demux_deactivate_current_chain (ogg);
GST_DEBUG_OBJECT (ogg, "Setting current chain to %p", chain);
ogg->current_chain = chain;
/* we are finished now */
gst_element_no_more_pads (GST_ELEMENT (ogg));
/* FIXME, must be sent from the streaming thread */
if (event) {
GstTagList *tags;
gst_ogg_demux_send_event (ogg, event);
tags = gst_tag_list_new (GST_TAG_CONTAINER_FORMAT, "Ogg", NULL);
gst_ogg_demux_send_event (ogg, gst_event_new_tag (tags));
}
GST_DEBUG_OBJECT (ogg, "starting chain");
/* then send out any headers and queued packets */
for (i = 0; i < chain->streams->len; i++) {
GList *walk;
GstOggPad *pad;
pad = g_array_index (chain->streams, GstOggPad *, i);
/* FIXME also streaming thread */
if (pad->map.taglist) {
GST_DEBUG_OBJECT (ogg, "pushing tags");
gst_pad_push_event (GST_PAD_CAST (pad),
gst_event_new_tag (pad->map.taglist));
pad->map.taglist = NULL;
}
/* Set headers on caps */
pad->map.caps =
gst_ogg_demux_set_header_on_caps (ogg, pad->map.caps, pad->map.headers);
gst_pad_set_caps (GST_PAD_CAST (pad), pad->map.caps);
GST_DEBUG_OBJECT (ogg, "pushing headers");
/* push headers */
for (walk = pad->map.headers; walk; walk = g_list_next (walk)) {
ogg_packet *p = walk->data;
gst_ogg_demux_chain_peer (pad, p, TRUE);
}
GST_DEBUG_OBJECT (ogg, "pushing queued buffers");
gst_ogg_demux_push_queued_buffers (ogg, pad);
}
return TRUE;
}
static gboolean
do_binary_search (GstOggDemux * ogg, GstOggChain * chain, gint64 begin,
gint64 end, gint64 begintime, gint64 endtime, gint64 target,
gint64 * offset)
{
gint64 best;
GstFlowReturn ret;
gint64 result = 0;
best = begin;
GST_DEBUG_OBJECT (ogg,
"chain offset %" G_GINT64_FORMAT ", end offset %" G_GINT64_FORMAT,
begin, end);
GST_DEBUG_OBJECT (ogg,
"chain begin time %" GST_TIME_FORMAT ", end time %" GST_TIME_FORMAT,
GST_TIME_ARGS (begintime), GST_TIME_ARGS (endtime));
GST_DEBUG_OBJECT (ogg, "target %" GST_TIME_FORMAT, GST_TIME_ARGS (target));
/* perform the seek */
while (begin < end) {
gint64 bisect;
if ((end - begin < CHUNKSIZE) || (endtime == begintime)) {
bisect = begin;
} else {
/* take a (pretty decent) guess, avoiding overflow */
gint64 rate = (end - begin) * GST_MSECOND / (endtime - begintime);
bisect = (target - begintime) / GST_MSECOND * rate + begin - CHUNKSIZE;
if (bisect <= begin)
bisect = begin;
GST_DEBUG_OBJECT (ogg, "Initial guess: %" G_GINT64_FORMAT, bisect);
}
gst_ogg_demux_seek (ogg, bisect);
while (begin < end) {
ogg_page og;
GST_DEBUG_OBJECT (ogg,
"after seek, bisect %" G_GINT64_FORMAT ", begin %" G_GINT64_FORMAT
", end %" G_GINT64_FORMAT, bisect, begin, end);
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, &result);
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
result);
if (ret == GST_FLOW_LIMIT) {
/* we hit the upper limit, go back a bit */
if (bisect <= begin + 1) {
end = begin; /* found it */
} else {
if (bisect == 0)
goto seek_error;
bisect -= CHUNKSIZE;
if (bisect <= begin)
bisect = begin + 1;
gst_ogg_demux_seek (ogg, bisect);
}
} else if (ret == GST_FLOW_OK) {
/* found offset of next ogg page */
gint64 granulepos;
GstClockTime granuletime;
GstOggPad *pad;
/* get the granulepos */
GST_LOG_OBJECT (ogg, "found next ogg page at %" G_GINT64_FORMAT,
result);
granulepos = ogg_page_granulepos (&og);
if (granulepos == -1) {
GST_LOG_OBJECT (ogg, "granulepos of next page is -1");
continue;
}
/* get the stream */
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
if (pad == NULL || pad->map.is_skeleton)
continue;
/* convert granulepos to time */
granuletime = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
granulepos);
if (granuletime < pad->start_time)
continue;
GST_LOG_OBJECT (ogg, "granulepos %" G_GINT64_FORMAT " maps to time %"
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
granuletime -= pad->start_time;
granuletime += chain->begin_time;
GST_DEBUG_OBJECT (ogg,
"found page with granule %" G_GINT64_FORMAT " and time %"
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
if (granuletime < target) {
best = result; /* raw offset of packet with granulepos */
begin = ogg->offset; /* raw offset of next page */
begintime = granuletime;
bisect = begin; /* *not* begin + 1 */
} else {
if (bisect <= begin + 1) {
end = begin; /* found it */
} else {
if (end == ogg->offset) { /* we're pretty close - we'd be stuck in */
end = result;
bisect -= CHUNKSIZE; /* an endless loop otherwise. */
if (bisect <= begin)
bisect = begin + 1;
gst_ogg_demux_seek (ogg, bisect);
} else {
end = result;
endtime = granuletime;
break;
}
}
}
} else
goto seek_error;
}
}
GST_DEBUG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, best);
gst_ogg_demux_seek (ogg, best);
*offset = best;
return TRUE;
/* ERRORS */
seek_error:
{
GST_DEBUG_OBJECT (ogg, "got a seek error");
return FALSE;
}
}
static gboolean
do_index_search (GstOggDemux * ogg, GstOggChain * chain, gint64 begin,
gint64 end, gint64 begintime, gint64 endtime, gint64 target,
gint64 * p_offset, gint64 * p_timestamp)
{
guint i;
guint64 timestamp, offset;
guint64 r_timestamp, r_offset;
gboolean result = FALSE;
target -= begintime;
r_offset = -1;
r_timestamp = -1;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
timestamp = target;
if (gst_ogg_map_search_index (&pad->map, TRUE, &timestamp, &offset)) {
GST_INFO ("found %" G_GUINT64_FORMAT " at offset %" G_GUINT64_FORMAT,
timestamp, offset);
if (r_offset == -1 || offset < r_offset) {
r_offset = offset;
r_timestamp = timestamp;
}
result |= TRUE;
}
}
if (p_timestamp)
*p_timestamp = r_timestamp;
if (p_offset)
*p_offset = r_offset;
return result;
}
/*
* do seek to time @position, return FALSE or chain and TRUE
*/
static gboolean
gst_ogg_demux_do_seek (GstOggDemux * ogg, GstSegment * segment,
gboolean accurate, gboolean keyframe, GstOggChain ** rchain)
{
guint64 position;
GstOggChain *chain = NULL;
gint64 begin, end;
gint64 begintime, endtime;
gint64 target, keytarget;
gint64 best;
gint64 total;
gint64 result = 0;
GstFlowReturn ret;
gint i, pending, len;
gboolean first_parsed_page = TRUE;
position = segment->position;
/* first find the chain to search in */
total = ogg->total_time;
if (ogg->chains->len == 0)
goto no_chains;
for (i = ogg->chains->len - 1; i >= 0; i--) {
chain = g_array_index (ogg->chains, GstOggChain *, i);
total -= chain->total_time;
if (position >= total)
break;
}
/* first step, locate page containing the required data */
begin = chain->offset;
end = chain->end_offset;
begintime = chain->begin_time;
endtime = begintime + chain->total_time;
target = position - total + begintime;
if (!do_binary_search (ogg, chain, begin, end, begintime, endtime, target,
&best))
goto seek_error;
/* second step: find pages for all streams, we use the keyframe_granule to keep
* track of which ones we saw. If we have seen a page for each stream we can
* calculate the positions of each keyframe. */
GST_DEBUG_OBJECT (ogg, "find keyframes");
len = pending = chain->streams->len;
/* figure out where the keyframes are */
keytarget = target;
while (TRUE) {
ogg_page og;
gint64 granulepos;
GstOggPad *pad;
GstClockTime keyframe_time, granule_time;
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, &result);
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
result);
if (ret == GST_FLOW_LIMIT) {
GST_LOG_OBJECT (ogg, "reached limit");
break;
} else if (ret != GST_FLOW_OK)
goto seek_error;
/* get the stream */
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
if (pad == NULL)
continue;
if (pad->map.is_skeleton)
goto next;
granulepos = ogg_page_granulepos (&og);
if (granulepos == -1 || granulepos == 0) {
GST_LOG_OBJECT (ogg, "granulepos of next page is -1");
continue;
}
/* we only do this the first time we pass here */
if (first_parsed_page) {
/* Now that we have a time reference from the page, we can check
* whether all streams still have pages from here on.
*
* This would be more elegant before the loop, but getting the page from
* there without breaking anything would be more costly */
granule_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
granulepos);
for (i = 0; i < len; i++) {
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
if (stream == pad)
/* we already know we have at least one page (the current one)
* for this stream */
continue;
if (granule_time > stream->map.total_time)
/* we won't encounter any more pages of this stream, so we don't
* try finding a key frame for it */
pending--;
}
first_parsed_page = FALSE;
}
/* in reverse we want to go past the page with the lower timestamp */
if (segment->rate < 0.0) {
/* get time for this pad */
granule_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
granulepos);
GST_LOG_OBJECT (ogg,
"looking at page with ts %" GST_TIME_FORMAT ", target %"
GST_TIME_FORMAT, GST_TIME_ARGS (granule_time),
GST_TIME_ARGS (target));
if (granule_time < target)
continue;
}
/* we've seen this pad before */
if (pad->keyframe_granule != -1)
continue;
/* convert granule of this pad to the granule of the keyframe */
pad->keyframe_granule =
gst_ogg_stream_granulepos_to_key_granule (&pad->map, granulepos);
GST_LOG_OBJECT (ogg, "marking stream granule %" G_GINT64_FORMAT,
pad->keyframe_granule);
/* get time of the keyframe */
keyframe_time =
gst_ogg_stream_granule_to_time (&pad->map, pad->keyframe_granule);
GST_LOG_OBJECT (ogg,
"stream %08x granule time %" GST_TIME_FORMAT,
pad->map.serialno, GST_TIME_ARGS (keyframe_time));
/* collect smallest value */
if (keyframe_time != -1) {
keyframe_time += begintime;
if (keyframe_time < keytarget)
keytarget = keyframe_time;
}
next:
pending--;
if (pending == 0)
break;
}
/* for negative rates we will get to the keyframe backwards */
if (segment->rate < 0.0)
goto done;
if (keytarget != target) {
GST_LOG_OBJECT (ogg, "final seek to target %" GST_TIME_FORMAT,
GST_TIME_ARGS (keytarget));
/* last step, seek to the location of the keyframe */
if (!do_binary_search (ogg, chain, begin, end, begintime, endtime,
keytarget, &best))
goto seek_error;
} else {
/* seek back to previous position */
GST_LOG_OBJECT (ogg, "keyframe on target");
gst_ogg_demux_seek (ogg, best);
}
done:
if (keyframe) {
if (segment->rate > 0.0)
segment->time = keytarget;
segment->position = keytarget - begintime;
}
*rchain = chain;
return TRUE;
no_chains:
{
GST_DEBUG_OBJECT (ogg, "no chains");
return FALSE;
}
seek_error:
{
GST_DEBUG_OBJECT (ogg, "got a seek error");
return FALSE;
}
}
/* does not take ownership of the event */
static gboolean
gst_ogg_demux_perform_seek_pull (GstOggDemux * ogg, GstEvent * event)
{
GstOggChain *chain = NULL;
gboolean res;
gboolean flush, accurate, keyframe;
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gboolean update;
guint32 seqnum;
GstEvent *tevent;
if (event) {
GST_DEBUG_OBJECT (ogg, "seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* we can only seek on time */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (ogg, "can only seek on TIME");
goto error;
}
seqnum = gst_event_get_seqnum (event);
} else {
GST_DEBUG_OBJECT (ogg, "seek without event");
flags = 0;
rate = 1.0;
seqnum = gst_util_seqnum_next ();
}
GST_DEBUG_OBJECT (ogg, "seek, rate %g", rate);
flush = flags & GST_SEEK_FLAG_FLUSH;
accurate = flags & GST_SEEK_FLAG_ACCURATE;
keyframe = flags & GST_SEEK_FLAG_KEY_UNIT;
/* first step is to unlock the streaming thread if it is
* blocked in a chain call, we do this by starting the flush. because
* we cannot yet hold any streaming lock, we have to protect the chains
* with their own lock. */
if (flush) {
gint i;
tevent = gst_event_new_flush_start ();
gst_event_set_seqnum (tevent, seqnum);
gst_event_ref (tevent);
gst_pad_push_event (ogg->sinkpad, tevent);
GST_CHAIN_LOCK (ogg);
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gint j;
for (j = 0; j < chain->streams->len; j++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
gst_event_ref (tevent);
gst_pad_push_event (GST_PAD (pad), tevent);
}
}
GST_CHAIN_UNLOCK (ogg);
gst_event_unref (tevent);
} else {
gst_pad_pause_task (ogg->sinkpad);
}
/* now grab the stream lock so that streaming cannot continue, for
* non flushing seeks when the element is in PAUSED this could block
* forever. */
GST_PAD_STREAM_LOCK (ogg->sinkpad);
if (event) {
gst_segment_do_seek (&ogg->segment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
GST_DEBUG_OBJECT (ogg, "segment positions set to %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT, GST_TIME_ARGS (ogg->segment.start),
GST_TIME_ARGS (ogg->segment.stop));
/* we need to stop flushing on the srcpad as we're going to use it
* next. We can do this as we have the STREAM lock now. */
if (flush) {
tevent = gst_event_new_flush_stop (TRUE);
gst_event_set_seqnum (tevent, seqnum);
gst_pad_push_event (ogg->sinkpad, tevent);
}
{
gint i;
/* reset all ogg streams now, need to do this from within the lock to
* make sure the streaming thread is not messing with the stream */
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gst_ogg_chain_reset (chain);
}
}
/* for reverse we will already seek accurately */
res = gst_ogg_demux_do_seek (ogg, &ogg->segment, accurate, keyframe, &chain);
/* seek failed, make sure we continue the current chain */
if (!res) {
GST_DEBUG_OBJECT (ogg, "seek failed");
chain = ogg->current_chain;
} else {
GST_DEBUG_OBJECT (ogg, "seek success");
}
if (!chain)
goto no_chain;
/* now we have a new position, prepare for streaming again */
{
GstEvent *event;
gint64 stop;
gint64 start;
gint64 position, begin_time;
GstSegment segment;
/* we have to send the flush to the old chain, not the new one */
if (flush) {
tevent = gst_event_new_flush_stop (TRUE);
gst_event_set_seqnum (tevent, seqnum);
gst_ogg_demux_send_event (ogg, tevent);
}
/* we need this to see how far inside the chain we need to start */
if (chain->begin_time != GST_CLOCK_TIME_NONE)
begin_time = chain->begin_time;
else
begin_time = 0;
/* segment.start gives the start over all chains, we calculate the amount
* of time into this chain we need to start */
start = ogg->segment.start - begin_time;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
start += chain->segment_start;
if ((stop = ogg->segment.stop) == -1)
stop = ogg->segment.duration;
/* segment.stop gives the stop time over all chains, calculate the amount of
* time we need to stop in this chain */
if (stop != -1) {
if (stop > begin_time)
stop -= begin_time;
else
stop = 0;
stop += chain->segment_start;
/* we must stop when this chain ends and switch to the next chain to play
* the remainder of the segment. */
stop = MIN (stop, chain->segment_stop);
}
position = ogg->segment.position;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
position += chain->segment_start;
gst_segment_copy_into (&ogg->segment, &segment);
/* create the segment event we are going to send out */
if (ogg->segment.rate >= 0.0) {
segment.start = position;
segment.stop = stop;
} else {
segment.start = start;
segment.stop = position;
}
event = gst_event_new_segment (&segment);
gst_event_set_seqnum (event, seqnum);
if (chain != ogg->current_chain) {
/* switch to different chain, send segment on new chain */
gst_ogg_demux_activate_chain (ogg, chain, event);
} else {
/* mark discont and send segment on current chain */
gst_ogg_chain_mark_discont (chain);
/* This event should be sent from the streaming thread (sink pad task) */
if (ogg->newsegment)
gst_event_unref (ogg->newsegment);
ogg->newsegment = event;
}
/* notify start of new segment */
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
GstMessage *message;
message = gst_message_new_segment_start (GST_OBJECT (ogg),
GST_FORMAT_TIME, ogg->segment.position);
gst_message_set_seqnum (message, seqnum);
gst_element_post_message (GST_ELEMENT (ogg), message);
}
ogg->seqnum = seqnum;
/* restart our task since it might have been stopped when we did the
* flush. */
gst_pad_start_task (ogg->sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
ogg->sinkpad);
}
/* streaming can continue now */
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (ogg, "seek failed");
return FALSE;
}
no_chain:
{
GST_DEBUG_OBJECT (ogg, "no chain to seek in");
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
return FALSE;
}
}
static gboolean
gst_ogg_demux_get_duration_push (GstOggDemux * ogg, int flags)
{
/* In push mode, we get to the end of the stream to get the duration */
gint64 position;
GstEvent *sevent;
gboolean res;
/* A full Ogg page can be almost 64 KB. There's no guarantee that there'll be a
granpos there, but it's fairly likely */
position =
ogg->push_byte_length - DURATION_CHUNK_OFFSET - EOS_AVOIDANCE_THRESHOLD;
if (position < 0)
position = 0;
GST_DEBUG_OBJECT (ogg,
"Getting duration, seeking near the end, to %" G_GINT64_FORMAT, position);
ogg->push_state = PUSH_DURATION;
/* do not read the last byte */
sevent = gst_event_new_seek (1.0, GST_FORMAT_BYTES, flags, GST_SEEK_TYPE_SET,
position, GST_SEEK_TYPE_SET, ogg->push_byte_length - 1);
res = gst_pad_push_event (ogg->sinkpad, sevent);
if (res) {
GST_DEBUG_OBJECT (ogg, "Seek succesful");
return TRUE;
} else {
GST_INFO_OBJECT (ogg, "Seek failed, duration will stay unknown");
ogg->push_state = PUSH_PLAYING;
ogg->push_disable_seeking = TRUE;
return FALSE;
}
}
static gboolean
gst_ogg_demux_check_duration_push (GstOggDemux * ogg, GstSeekFlags flags,
GstEvent * event)
{
if (ogg->push_byte_length < 0) {
GstPad *peer;
GST_DEBUG_OBJECT (ogg, "Trying to find byte/time length");
if ((peer = gst_pad_get_peer (ogg->sinkpad)) != NULL) {
gint64 length;
int res;
res = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &length);
if (res && length > 0) {
ogg->push_byte_length = length;
GST_DEBUG_OBJECT (ogg,
"File byte length %" G_GINT64_FORMAT, ogg->push_byte_length);
}
res = gst_pad_query_duration (peer, GST_FORMAT_TIME, &length);
gst_object_unref (peer);
if (res && length >= 0) {
ogg->push_time_length = length;
GST_DEBUG_OBJECT (ogg, "File time length %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->push_time_length));
} else if (!ogg->push_disable_seeking) {
gboolean res;
res = gst_ogg_demux_get_duration_push (ogg, flags);
if (res) {
GST_DEBUG_OBJECT (ogg,
"File time length unknown, trying to determine");
ogg->push_mode_seek_delayed_event = NULL;
if (event) {
GST_DEBUG_OBJECT (ogg,
"Let me intercept this innocent looking seek request");
ogg->push_mode_seek_delayed_event = gst_event_copy (event);
}
return FALSE;
}
}
}
}
return TRUE;
}
static gboolean
gst_ogg_demux_perform_seek_push (GstOggDemux * ogg, GstEvent * event)
{
gint bitrate;
gboolean res = TRUE;
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
GstEvent *sevent;
GstOggChain *chain;
gint64 best, best_time;
gint i;
GST_DEBUG_OBJECT (ogg, "Push mode seek request received");
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (ogg, "can only seek on TIME");
goto error;
}
if (start_type != GST_SEEK_TYPE_SET) {
GST_DEBUG_OBJECT (ogg, "can only seek to a SET target");
goto error;
}
if (!(flags & GST_SEEK_FLAG_FLUSH)) {
GST_DEBUG_OBJECT (ogg, "can only do flushing seeks");
goto error;
}
GST_DEBUG_OBJECT (ogg, "Push mode seek request: %" GST_TIME_FORMAT,
GST_TIME_ARGS (start));
chain = ogg->current_chain;
if (!chain) {
GST_WARNING_OBJECT (ogg, "No chain to seek on");
goto error;
}
/* start accessing push_* members */
GST_PUSH_LOCK (ogg);
/* not if we disabled seeking (chained streams) */
if (ogg->push_disable_seeking) {
GST_DEBUG_OBJECT (ogg, "Seeking disabled");
goto error_locked;
}
/* not when we're trying to work out duration */
if (ogg->push_state == PUSH_DURATION) {
GST_DEBUG_OBJECT (ogg, "Busy working out duration, try again later");
goto error_locked;
}
/* actually, not if we're doing any seeking already */
if (ogg->push_state != PUSH_PLAYING) {
GST_DEBUG_OBJECT (ogg, "Already doing some seeking, try again later");
goto error_locked;
}
/* on the first seek, get length if we can */
if (!gst_ogg_demux_check_duration_push (ogg, flags, event)) {
GST_PUSH_UNLOCK (ogg);
return FALSE;
}
if (do_index_search (ogg, chain, 0, -1, 0, -1, start, &best, &best_time)) {
/* the index gave some result */
GST_DEBUG_OBJECT (ogg,
"found offset %" G_GINT64_FORMAT " with time %" G_GUINT64_FORMAT,
best, best_time);
} else {
if (ogg->push_time_length > 0) {
/* if we know the time length, we know the full segment bitrate */
GST_DEBUG_OBJECT (ogg, "Using real file bitrate");
bitrate =
gst_util_uint64_scale (ogg->push_byte_length, 8 * GST_SECOND,
ogg->push_time_length);
} else if (ogg->push_time_offset > 0) {
/* get a first approximation using known bitrate to the current position */
GST_DEBUG_OBJECT (ogg, "Using file bitrate so far");
bitrate =
gst_util_uint64_scale (ogg->push_byte_offset, 8 * GST_SECOND,
ogg->push_time_offset);
} else if (ogg->bitrate > 0) {
/* nominal bitrate is better than nothing, even if it lies often */
GST_DEBUG_OBJECT (ogg, "Using nominal bitrate");
bitrate = ogg->bitrate;
} else {
/* meh */
GST_DEBUG_OBJECT (ogg,
"At stream start, and no nominal bitrate, using some random magic "
"number to seed");
/* the bisection, once started, should give us a better approximation */
bitrate = 1000;
}
best = gst_util_uint64_scale (start, bitrate, 8 * GST_SECOND);
}
/* offset by typical page length, and ensure our best guess is within
reasonable bounds */
best -= CHUNKSIZE;
if (best < 0)
best = 0;
if (ogg->push_byte_length > 0 && best >= ogg->push_byte_length)
best = ogg->push_byte_length - 1;
/* set up bisection search */
ogg->push_offset0 = 0;
ogg->push_offset1 = ogg->push_byte_length - 1;
ogg->push_time0 = ogg->push_start_time;
ogg->push_time1 = ogg->push_time_length;
ogg->push_seek_time_target = start;
ogg->push_seek_time_original_target = start;
ogg->push_state = PUSH_BISECT1;
/* reset pad push mode seeking state */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
pad->push_kf_time = GST_CLOCK_TIME_NONE;
pad->push_sync_time = GST_CLOCK_TIME_NONE;
}
GST_DEBUG_OBJECT (ogg,
"Setting up bisection search for %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT
" (time %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT ")", ogg->push_offset0,
ogg->push_offset1, GST_TIME_ARGS (ogg->push_time0),
GST_TIME_ARGS (ogg->push_time1));
GST_DEBUG_OBJECT (ogg,
"Target time is %" GST_TIME_FORMAT ", best first guess is %"
G_GINT64_FORMAT, GST_TIME_ARGS (ogg->push_seek_time_target), best);
ogg->push_seek_rate = rate;
ogg->push_seek_flags = flags;
ogg->push_mode_seek_delayed_event = NULL;
ogg->push_bisection_steps[0] = 1;
ogg->push_bisection_steps[1] = 0;
sevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
start_type, best, GST_SEEK_TYPE_NONE, -1);
GST_PUSH_UNLOCK (ogg);
res = gst_pad_push_event (ogg->sinkpad, sevent);
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (ogg, "seek failed");
return FALSE;
}
error_locked:
GST_PUSH_UNLOCK (ogg);
goto error;
}
static gboolean
gst_ogg_demux_perform_seek (GstOggDemux * ogg, GstEvent * event)
{
gboolean res;
if (ogg->pullmode) {
res = gst_ogg_demux_perform_seek_pull (ogg, event);
} else {
res = gst_ogg_demux_perform_seek_push (ogg, event);
}
return res;
}
/* finds each bitstream link one at a time using a bisection search
* (has to begin by knowing the offset of the lb's initial page).
* Recurses for each link so it can alloc the link storage after
* finding them all, then unroll and fill the cache at the same time
*/
static GstFlowReturn
gst_ogg_demux_bisect_forward_serialno (GstOggDemux * ogg,
gint64 begin, gint64 searched, gint64 end, GstOggChain * chain, glong m)
{
gint64 endsearched = end;
gint64 next = end;
ogg_page og;
GstFlowReturn ret;
gint64 offset;
GstOggChain *nextchain;
GST_LOG_OBJECT (ogg,
"bisect begin: %" G_GINT64_FORMAT ", searched: %" G_GINT64_FORMAT
", end %" G_GINT64_FORMAT ", chain: %p", begin, searched, end, chain);
/* the below guards against garbage seperating the last and
* first pages of two links. */
while (searched < endsearched) {
gint64 bisect;
if (endsearched - searched < CHUNKSIZE) {
bisect = searched;
} else {
bisect = (searched + endsearched) / 2;
}
gst_ogg_demux_seek (ogg, bisect);
ret = gst_ogg_demux_get_next_page (ogg, &og, -1, &offset);
if (ret == GST_FLOW_EOS) {
endsearched = bisect;
} else if (ret == GST_FLOW_OK) {
guint32 serial = ogg_page_serialno (&og);
if (!gst_ogg_chain_has_stream (chain, serial)) {
endsearched = bisect;
next = offset;
} else {
searched = offset + og.header_len + og.body_len;
}
} else
return ret;
}
GST_LOG_OBJECT (ogg, "current chain ends at %" G_GINT64_FORMAT, searched);
chain->end_offset = searched;
ret = gst_ogg_demux_read_end_chain (ogg, chain);
if (ret != GST_FLOW_OK)
return ret;
GST_LOG_OBJECT (ogg, "found begin at %" G_GINT64_FORMAT, next);
gst_ogg_demux_seek (ogg, next);
ret = gst_ogg_demux_read_chain (ogg, &nextchain);
if (ret == GST_FLOW_EOS) {
nextchain = NULL;
ret = GST_FLOW_OK;
GST_LOG_OBJECT (ogg, "no next chain");
} else if (ret != GST_FLOW_OK)
goto done;
if (searched < end && nextchain != NULL) {
ret = gst_ogg_demux_bisect_forward_serialno (ogg, next, ogg->offset,
end, nextchain, m + 1);
if (ret != GST_FLOW_OK)
goto done;
}
GST_LOG_OBJECT (ogg, "adding chain %p", chain);
g_array_insert_val (ogg->chains, 0, chain);
done:
return ret;
}
/* read a chain from the ogg file. This code will
* read all BOS pages and will create and return a GstOggChain
* structure with the results.
*
* This function will also read N pages from each stream in the
* chain and submit them to the decoders. When the decoder has
* decoded the first buffer, we know the timestamp of the first
* page in the chain.
*/
static GstFlowReturn
gst_ogg_demux_read_chain (GstOggDemux * ogg, GstOggChain ** res_chain)
{
GstFlowReturn ret;
GstOggChain *chain = NULL;
gint64 offset = ogg->offset;
ogg_page og;
gboolean done;
gint i;
GST_LOG_OBJECT (ogg, "reading chain at %" G_GINT64_FORMAT, offset);
/* first read the BOS pages, do typefind on them, create
* the decoders, send data to the decoders. */
while (TRUE) {
GstOggPad *pad;
guint32 serial;
ret = gst_ogg_demux_get_next_page (ogg, &og, -1, NULL);
if (ret != GST_FLOW_OK) {
if (ret == GST_FLOW_EOS) {
GST_DEBUG_OBJECT (ogg, "Reached EOS, done reading end chain");
} else {
GST_WARNING_OBJECT (ogg, "problem reading BOS page: ret=%d", ret);
}
break;
}
if (!ogg_page_bos (&og)) {
GST_INFO_OBJECT (ogg, "page is not BOS page, all streams identified");
/* if we did not find a chain yet, assume this is a bogus stream and
* ignore it */
if (!chain) {
GST_WARNING_OBJECT (ogg, "No chain found, no Ogg data in stream ?");
ret = GST_FLOW_EOS;
}
break;
}
if (chain == NULL) {
chain = gst_ogg_chain_new (ogg);
chain->offset = offset;
}
serial = ogg_page_serialno (&og);
if (gst_ogg_chain_get_stream (chain, serial) != NULL) {
GST_WARNING_OBJECT (ogg,
"found serial %08x BOS page twice, ignoring", serial);
continue;
}
pad = gst_ogg_chain_new_stream (chain, serial);
gst_ogg_pad_submit_page (pad, &og);
}
if (ret != GST_FLOW_OK || chain == NULL) {
if (ret == GST_FLOW_OK) {
GST_WARNING_OBJECT (ogg, "no chain was found");
ret = GST_FLOW_ERROR;
} else if (ret != GST_FLOW_EOS) {
GST_WARNING_OBJECT (ogg, "failed to read chain");
} else {
GST_DEBUG_OBJECT (ogg, "done reading chains");
}
if (chain) {
gst_ogg_chain_free (chain);
}
if (res_chain)
*res_chain = NULL;
return ret;
}
chain->have_bos = TRUE;
GST_LOG_OBJECT (ogg, "read bos pages, init decoder now");
/* now read pages until we receive a buffer from each of the
* stream decoders, this will tell us the timestamp of the
* first packet in the chain then */
/* save the offset to the first non bos page in the chain: if searching for
* pad->first_time we read past the end of the chain, we'll seek back to this
* position
*/
offset = ogg->offset;
done = FALSE;
while (!done) {
guint32 serial;
gboolean known_serial = FALSE;
GstFlowReturn ret;
serial = ogg_page_serialno (&og);
done = TRUE;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
GST_LOG_OBJECT (ogg,
"serial %08x time %" GST_TIME_FORMAT,
pad->map.serialno, GST_TIME_ARGS (pad->start_time));
if (pad->map.serialno == serial) {
known_serial = TRUE;
/* submit the page now, this will fill in the start_time when the
* internal decoder finds it */
gst_ogg_pad_submit_page (pad, &og);
if (!pad->map.is_skeleton && pad->start_time == -1
&& ogg_page_eos (&og)) {
/* got EOS on a pad before we could find its start_time.
* We have no chance of finding a start_time for every pad so
* stop searching for the other start_time(s).
*/
done = TRUE;
break;
}
}
/* the timestamp will be filled in when we submit the pages */
if (!pad->map.is_sparse)
done &= (pad->start_time != GST_CLOCK_TIME_NONE);
GST_LOG_OBJECT (ogg, "done %08x now %d", pad->map.serialno, done);
}
/* we read a page not belonging to the current chain: seek back to the
* beginning of the chain
*/
if (!known_serial) {
GST_LOG_OBJECT (ogg, "unknown serial %08x", serial);
gst_ogg_demux_seek (ogg, offset);
break;
}
if (!done) {
ret = gst_ogg_demux_get_next_page (ogg, &og, -1, NULL);
if (ret != GST_FLOW_OK)
break;
}
}
GST_LOG_OBJECT (ogg, "done reading chain");
/* now we can fill in the missing info using queries */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.is_skeleton)
continue;
pad->mode = GST_OGG_PAD_MODE_STREAMING;
}
if (res_chain)
*res_chain = chain;
return GST_FLOW_OK;
}
/* read the last pages from the ogg stream to get the final
* page end_offsets.
*/
static GstFlowReturn
gst_ogg_demux_read_end_chain (GstOggDemux * ogg, GstOggChain * chain)
{
gint64 begin = chain->end_offset;
gint64 end = begin;
gint64 last_granule = -1;
GstOggPad *last_pad = NULL;
GstFlowReturn ret;
gboolean done = FALSE;
ogg_page og;
gint i;
while (!done) {
begin -= CHUNKSIZE;
if (begin < 0)
begin = 0;
gst_ogg_demux_seek (ogg, begin);
/* now continue reading until we run out of data, if we find a page
* start, we save it. It might not be the final page as there could be
* another page after this one. */
while (ogg->offset < end) {
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, NULL);
if (ret == GST_FLOW_LIMIT)
break;
if (ret != GST_FLOW_OK)
return ret;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->map.is_skeleton)
continue;
if (pad->map.serialno == ogg_page_serialno (&og)) {
gint64 granulepos = ogg_page_granulepos (&og);
if (granulepos != -1) {
last_granule = granulepos;
last_pad = pad;
done = TRUE;
}
break;
}
}
}
}
if (last_pad) {
chain->segment_stop =
gst_ogg_stream_get_end_time_for_granulepos (&last_pad->map,
last_granule);
} else {
chain->segment_stop = GST_CLOCK_TIME_NONE;
}
GST_INFO ("segment stop %" G_GUINT64_FORMAT, chain->segment_stop);
return GST_FLOW_OK;
}
/* find a pad with a given serial number
*/
static GstOggPad *
gst_ogg_demux_find_pad (GstOggDemux * ogg, guint32 serialno)
{
GstOggPad *pad;
gint i;
/* first look in building chain if any */
if (ogg->building_chain) {
pad = gst_ogg_chain_get_stream (ogg->building_chain, serialno);
if (pad)
return pad;
}
/* then look in current chain if any */
if (ogg->current_chain) {
pad = gst_ogg_chain_get_stream (ogg->current_chain, serialno);
if (pad)
return pad;
}
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
pad = gst_ogg_chain_get_stream (chain, serialno);
if (pad)
return pad;
}
return NULL;
}
/* find a chain with a given serial number
*/
static GstOggChain *
gst_ogg_demux_find_chain (GstOggDemux * ogg, guint32 serialno)
{
GstOggPad *pad;
pad = gst_ogg_demux_find_pad (ogg, serialno);
if (pad) {
return pad->chain;
}
return NULL;
}
/* returns TRUE if all streams have valid start time */
static gboolean
gst_ogg_demux_collect_chain_info (GstOggDemux * ogg, GstOggChain * chain)
{
gboolean res = TRUE;
chain->total_time = GST_CLOCK_TIME_NONE;
GST_DEBUG_OBJECT (ogg, "trying to collect chain info");
/* see if we have a start time on all streams */
chain->segment_start = gst_ogg_demux_collect_start_time (ogg, chain);
if (chain->segment_start == G_MAXUINT64) {
/* not yet, stream some more data */
res = FALSE;
} else if (chain->segment_stop != GST_CLOCK_TIME_NONE) {
/* we can calculate a total time */
chain->total_time = chain->segment_stop - chain->segment_start;
}
GST_DEBUG ("total time %" G_GUINT64_FORMAT, chain->total_time);
GST_DEBUG_OBJECT (ogg, "return %d", res);
return res;
}
static void
gst_ogg_demux_collect_info (GstOggDemux * ogg)
{
gint i;
/* collect all info */
ogg->total_time = 0;
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
chain->begin_time = ogg->total_time;
gst_ogg_demux_collect_chain_info (ogg, chain);
ogg->total_time += chain->total_time;
}
ogg->segment.duration = ogg->total_time;
}
/* find all the chains in the ogg file, this reads the first and
* last page of the ogg stream, if they match then the ogg file has
* just one chain, else we do a binary search for all chains.
*/
static GstFlowReturn
gst_ogg_demux_find_chains (GstOggDemux * ogg)
{
ogg_page og;
GstPad *peer;
gboolean res;
guint32 serialno;
GstOggChain *chain;
GstFlowReturn ret;
/* get peer to figure out length */
if ((peer = gst_pad_get_peer (ogg->sinkpad)) == NULL)
goto no_peer;
/* find length to read last page, we store this for later use. */
res = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ogg->length);
gst_object_unref (peer);
if (!res || ogg->length <= 0)
goto no_length;
GST_DEBUG_OBJECT (ogg, "file length %" G_GINT64_FORMAT, ogg->length);
/* read chain from offset 0, this is the first chain of the
* ogg file. */
gst_ogg_demux_seek (ogg, 0);
ret = gst_ogg_demux_read_chain (ogg, &chain);
if (ret != GST_FLOW_OK)
goto no_first_chain;
/* read page from end offset, we use this page to check if its serial
* number is contained in the first chain. If this is the case then
* this ogg is not a chained ogg and we can skip the scanning. */
gst_ogg_demux_seek (ogg, ogg->length);
ret = gst_ogg_demux_get_prev_page (ogg, &og, NULL);
if (ret != GST_FLOW_OK)
goto no_last_page;
serialno = ogg_page_serialno (&og);
if (!gst_ogg_chain_has_stream (chain, serialno)) {
/* the last page is not in the first stream, this means we should
* find all the chains in this chained ogg. */
ret =
gst_ogg_demux_bisect_forward_serialno (ogg, 0, 0, ogg->length, chain,
0);
} else {
/* we still call this function here but with an empty range so that
* we can reuse the setup code in this routine. */
ret =
gst_ogg_demux_bisect_forward_serialno (ogg, 0, ogg->length,
ogg->length, chain, 0);
}
if (ret != GST_FLOW_OK)
goto done;
/* all fine, collect and print */
gst_ogg_demux_collect_info (ogg);
/* dump our chains and streams */
gst_ogg_print (ogg);
done:
return ret;
/*** error cases ***/
no_peer:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("we don't have a peer"));
return GST_FLOW_NOT_LINKED;
}
no_length:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get file length"));
return GST_FLOW_NOT_SUPPORTED;
}
no_first_chain:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get first chain"));
return GST_FLOW_ERROR;
}
no_last_page:
{
GST_DEBUG_OBJECT (ogg, "can't get last page");
if (chain)
gst_ogg_chain_free (chain);
return ret;
}
}
static GstFlowReturn
gst_ogg_demux_handle_page (GstOggDemux * ogg, ogg_page * page)
{
GstOggPad *pad;
gint64 granule;
guint32 serialno;
GstFlowReturn result = GST_FLOW_OK;
serialno = ogg_page_serialno (page);
granule = ogg_page_granulepos (page);
GST_LOG_OBJECT (ogg,
"processing ogg page (serial %08x, "
"pageno %ld, granulepos %" G_GINT64_FORMAT ", bos %d)", serialno,
ogg_page_pageno (page), granule, ogg_page_bos (page));
if (ogg_page_bos (page)) {
GstOggChain *chain;
/* first page */
/* see if we know about the chain already */
chain = gst_ogg_demux_find_chain (ogg, serialno);
if (chain) {
GstEvent *event;
gint64 start = 0;
GstSegment segment;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
start = chain->segment_start;
/* create the newsegment event we are going to send out */
gst_segment_copy_into (&ogg->segment, &segment);
segment.start = start;
segment.stop = chain->segment_stop;
segment.time = chain->begin_time;
event = gst_event_new_segment (&segment);
gst_event_set_seqnum (event, ogg->seqnum);
GST_DEBUG_OBJECT (ogg,
"segment: start %" GST_TIME_FORMAT ", stop %" GST_TIME_FORMAT
", time %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
GST_TIME_ARGS (chain->segment_stop),
GST_TIME_ARGS (chain->begin_time));
/* activate it as it means we have a non-header, this will also deactivate
* the currently running chain. */
gst_ogg_demux_activate_chain (ogg, chain, event);
pad = gst_ogg_demux_find_pad (ogg, serialno);
} else {
GstClockTime chain_time;
gint64 current_time;
/* this can only happen in push mode */
if (ogg->pullmode)
goto unknown_chain;
current_time = ogg->segment.position;
/* time of new chain is current time */
chain_time = current_time;
if (ogg->building_chain == NULL) {
GstOggChain *newchain;
newchain = gst_ogg_chain_new (ogg);
newchain->offset = 0;
/* set new chain begin time aligned with end time of old chain */
newchain->begin_time = chain_time;
GST_DEBUG_OBJECT (ogg, "new chain, begin time %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain_time));
/* and this is the one we are building now */
ogg->building_chain = newchain;
}
pad = gst_ogg_chain_new_stream (ogg->building_chain, serialno);
}
} else {
pad = gst_ogg_demux_find_pad (ogg, serialno);
}
if (pad) {
result = gst_ogg_pad_submit_page (pad, page);
} else {
GST_PUSH_LOCK (ogg);
if (!ogg->pullmode && !ogg->push_disable_seeking) {
/* no pad while probing for duration, we must have a chained stream,
and we don't support them, so back off */
GST_INFO_OBJECT (ogg, "We seem to have a chained stream, we won't seek");
if (ogg->push_state == PUSH_DURATION) {
GstFlowReturn res;
res = gst_ogg_demux_seek_back_after_push_duration_check_unlock (ogg);
if (res != GST_FLOW_OK)
return res;
}
/* only once we seeked back */
GST_PUSH_LOCK (ogg);
ogg->push_disable_seeking = TRUE;
} else {
GST_PUSH_UNLOCK (ogg);
/* no pad. This means an ogg page without bos has been seen for this
* serialno. we just ignore it but post a warning... */
GST_ELEMENT_WARNING (ogg, STREAM, DECODE,
(NULL), ("unknown ogg pad for serial %08x detected", serialno));
return GST_FLOW_OK;
}
GST_PUSH_UNLOCK (ogg);
}
return result;
/* ERRORS */
unknown_chain:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("unknown ogg chain for serial %08x detected", serialno));
return GST_FLOW_ERROR;
}
}
/* streaming mode, receive a buffer, parse it, create pads for
* the serialno, submit pages and packets to the oggpads
*/
static GstFlowReturn
gst_ogg_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstOggDemux *ogg;
gint ret = 0;
GstFlowReturn result = GST_FLOW_OK;
ogg = GST_OGG_DEMUX (parent);
GST_DEBUG_OBJECT (ogg, "enter");
result = gst_ogg_demux_submit_buffer (ogg, buffer);
if (result < 0) {
GST_DEBUG_OBJECT (ogg, "gst_ogg_demux_submit_buffer returned %d", result);
}
while (result == GST_FLOW_OK) {
ogg_page page;
ret = ogg_sync_pageout (&ogg->sync, &page);
if (ret == 0)
/* need more data */
break;
if (ret == -1) {
/* discontinuity in the pages */
GST_DEBUG_OBJECT (ogg, "discont in page found, continuing");
} else {
result = gst_ogg_demux_handle_page (ogg, &page);
if (result < 0) {
GST_DEBUG_OBJECT (ogg, "gst_ogg_demux_handle_page returned %d", result);
}
}
}
if (ret == 0 || result == GST_FLOW_OK) {
gst_ogg_demux_sync_streams (ogg);
}
GST_DEBUG_OBJECT (ogg, "leave with %d", result);
return result;
}
static gboolean
gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event)
{
GstOggChain *chain = ogg->current_chain;
gboolean res = TRUE;
if (!chain)
chain = ogg->building_chain;
if (chain) {
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_event_ref (event);
GST_DEBUG_OBJECT (pad, "Pushing event %" GST_PTR_FORMAT, event);
res &= gst_pad_push_event (GST_PAD (pad), event);
}
} else {
GST_WARNING_OBJECT (ogg, "No chain to forward event to");
}
gst_event_unref (event);
return res;
}
static GstFlowReturn
gst_ogg_demux_combine_flows (GstOggDemux * ogg, GstOggPad * pad,
GstFlowReturn ret)
{
GstOggChain *chain;
/* store the value */
pad->last_ret = ret;
/* any other error that is not-linked can be returned right
* away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
chain = ogg->current_chain;
if (chain) {
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *opad = g_array_index (chain->streams, GstOggPad *, i);
ret = opad->last_ret;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
}
done:
return ret;
}
/* returns TRUE if all streams in current chain reached EOS, FALSE otherwise */
static gboolean
gst_ogg_demux_check_eos (GstOggDemux * ogg)
{
GstOggChain *chain;
gboolean eos = TRUE;
chain = ogg->current_chain;
if (G_LIKELY (chain)) {
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *opad = g_array_index (chain->streams, GstOggPad *, i);
eos = eos && opad->is_eos;
}
} else {
eos = FALSE;
}
return eos;
}
static GstFlowReturn
gst_ogg_demux_loop_forward (GstOggDemux * ogg)
{
GstFlowReturn ret;
GstBuffer *buffer;
if (ogg->offset == ogg->length) {
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
" == %" G_GINT64_FORMAT, ogg->offset, ogg->length);
ret = GST_FLOW_EOS;
goto done;
}
GST_LOG_OBJECT (ogg, "pull data %" G_GINT64_FORMAT, ogg->offset);
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "Failed pull_range");
goto done;
}
ogg->offset += gst_buffer_get_size (buffer);
if (G_UNLIKELY (ogg->newsegment)) {
gst_ogg_demux_send_event (ogg, ogg->newsegment);
ogg->newsegment = NULL;
}
ret = gst_ogg_demux_chain (ogg->sinkpad, GST_OBJECT_CAST (ogg), buffer);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "Failed demux_chain");
goto done;
}
/* check for the end of the segment */
if (gst_ogg_demux_check_eos (ogg)) {
GST_LOG_OBJECT (ogg, "got EOS");
ret = GST_FLOW_EOS;
goto done;
}
done:
return ret;
}
/* reverse mode.
*
* We read the pages backwards and send the packets forwards. The first packet
* in the page will be pushed with the DISCONT flag set.
*
* Special care has to be taken for continued pages, which we can only decode
* when we have the previous page(s).
*/
static GstFlowReturn
gst_ogg_demux_loop_reverse (GstOggDemux * ogg)
{
GstFlowReturn ret;
ogg_page page;
gint64 offset;
if (ogg->offset == 0) {
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
" == 0", ogg->offset);
ret = GST_FLOW_EOS;
goto done;
}
GST_LOG_OBJECT (ogg, "read page from %" G_GINT64_FORMAT, ogg->offset);
ret = gst_ogg_demux_get_prev_page (ogg, &page, &offset);
if (ret != GST_FLOW_OK)
goto done;
ogg->offset = offset;
if (G_UNLIKELY (ogg->newsegment)) {
gst_ogg_demux_send_event (ogg, ogg->newsegment);
ogg->newsegment = NULL;
}
ret = gst_ogg_demux_handle_page (ogg, &page);
if (ret != GST_FLOW_OK)
goto done;
/* check for the end of the segment */
if (gst_ogg_demux_check_eos (ogg)) {
GST_LOG_OBJECT (ogg, "got EOS");
ret = GST_FLOW_EOS;
goto done;
}
done:
return ret;
}
static void
gst_ogg_demux_sync_streams (GstOggDemux * ogg)
{
GstClockTime cur;
GstOggChain *chain;
guint i;
chain = ogg->current_chain;
cur = ogg->segment.position;
if (chain == NULL || cur == -1)
return;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
/* Theoretically, we should be doing this for all streams, but we're only
* doing it for known-to-be-sparse streams at the moment in order not to
* break things for wrongly-muxed streams (like we used to produce once) */
if (stream->map.is_sparse && stream->position != GST_CLOCK_TIME_NONE) {
/* Does this stream lag? Random threshold of 2 seconds */
if (GST_CLOCK_DIFF (stream->position, cur) > (2 * GST_SECOND)) {
GST_DEBUG_OBJECT (stream, "synchronizing stream with others by "
"advancing time from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->position), GST_TIME_ARGS (cur));
stream->position = cur;
#if 0
ogg->segment.base += cur - stream->position;
/* advance stream time (FIXME: is this right, esp. time_pos?) */
gst_pad_push_event (GST_PAD_CAST (stream),
gst_event_new_new_segment (TRUE, ogg->segment.rate,
ogg->segment.applied_rate,
GST_FORMAT_TIME, stream->position, -1, stream->position));
#endif
}
}
}
}
/* random access code
*
* - first find all the chains and streams by scanning the file.
* - then get and chain buffers, just like the streaming case.
* - when seeking, we can use the chain info to perform the seek.
*/
static void
gst_ogg_demux_loop (GstOggPad * pad)
{
GstOggDemux *ogg;
GstFlowReturn ret;
GstEvent *event;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
if (ogg->need_chains) {
gboolean res;
/* this is the only place where we write chains and thus need to lock. */
GST_CHAIN_LOCK (ogg);
ret = gst_ogg_demux_find_chains (ogg);
GST_CHAIN_UNLOCK (ogg);
if (ret != GST_FLOW_OK)
goto chain_read_failed;
ogg->need_chains = FALSE;
GST_OBJECT_LOCK (ogg);
ogg->running = TRUE;
event = ogg->event;
ogg->event = NULL;
GST_OBJECT_UNLOCK (ogg);
/* and seek to configured positions without FLUSH */
res = gst_ogg_demux_perform_seek_pull (ogg, event);
if (event)
gst_event_unref (event);
if (!res)
goto seek_failed;
}
if (ogg->segment.rate >= 0.0)
ret = gst_ogg_demux_loop_forward (ogg);
else
ret = gst_ogg_demux_loop_reverse (ogg);
if (ret != GST_FLOW_OK)
goto pause;
gst_ogg_demux_sync_streams (ogg);
return;
/* ERRORS */
chain_read_failed:
{
/* error was posted */
goto pause;
}
seek_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
("failed to start demuxing ogg"));
ret = GST_FLOW_ERROR;
goto pause;
}
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GstEvent *event = NULL;
GST_LOG_OBJECT (ogg, "pausing task, reason %s", reason);
gst_pad_pause_task (ogg->sinkpad);
if (ret == GST_FLOW_EOS) {
/* perform EOS logic */
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
GstMessage *message;
/* for segment playback we need to post when (in stream time)
* we stopped, this is either stop (when set) or the duration. */
if ((stop = ogg->segment.stop) == -1)
stop = ogg->segment.duration;
GST_LOG_OBJECT (ogg, "Sending segment done, at end of segment");
message =
gst_message_new_segment_done (GST_OBJECT (ogg), GST_FORMAT_TIME,
stop);
gst_message_set_seqnum (message, ogg->seqnum);
gst_element_post_message (GST_ELEMENT (ogg), message);
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (ogg, "Sending EOS, at end of stream");
event = gst_event_new_eos ();
}
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
GST_ELEMENT_ERROR (ogg, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", reason));
event = gst_event_new_eos ();
}
/* For wrong-state we still want to pause the task and stop
* but no error message or other things are necessary.
* wrong-state is no real error and will be caused by flushing,
* e.g. because of a flushing seek.
*/
if (event) {
gst_event_set_seqnum (event, ogg->seqnum);
gst_ogg_demux_send_event (ogg, event);
}
return;
}
}
static void
gst_ogg_demux_clear_chains (GstOggDemux * ogg)
{
gint i;
gst_ogg_demux_deactivate_current_chain (ogg);
GST_CHAIN_LOCK (ogg);
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gst_ogg_chain_free (chain);
}
ogg->chains = g_array_set_size (ogg->chains, 0);
GST_CHAIN_UNLOCK (ogg);
}
/* this function is called when the pad is activated and should start
* processing data.
*
* We check if we can do random access to decide if we work push or
* pull based.
*/
static gboolean
gst_ogg_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
{
GstQuery *query;
gboolean pull_mode;
query = gst_query_new_scheduling ();
if (!gst_pad_peer_query (sinkpad, query)) {
gst_query_unref (query);
goto activate_push;
}
pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
gst_query_unref (query);
if (!pull_mode)
goto activate_push;
GST_DEBUG_OBJECT (sinkpad, "activating pull");
return gst_pad_activate_pull (sinkpad, TRUE);
activate_push:
{
GST_DEBUG_OBJECT (sinkpad, "activating push");
return gst_pad_activate_push (sinkpad, TRUE);
}
}
/* this function gets called when we activate ourselves in push mode.
* We cannot seek (ourselves) in the stream */
static gboolean
gst_ogg_demux_sink_activate_push (GstPad * sinkpad, GstObject * parent,
gboolean active)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (parent);
ogg->pullmode = FALSE;
ogg->resync = FALSE;
return TRUE;
}
/* this function gets called when we activate ourselves in pull mode.
* We can perform random access to the resource and we start a task
* to start reading */
static gboolean
gst_ogg_demux_sink_activate_pull (GstPad * sinkpad, GstObject * parent,
gboolean active)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (parent);
if (active) {
ogg->need_chains = TRUE;
ogg->pullmode = TRUE;
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
sinkpad);
} else {
return gst_pad_stop_task (sinkpad);
}
}
static GstStateChangeReturn
gst_ogg_demux_change_state (GstElement * element, GstStateChange transition)
{
GstOggDemux *ogg;
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
ogg = GST_OGG_DEMUX (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
ogg->basetime = 0;
ogg_sync_init (&ogg->sync);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
ogg_sync_reset (&ogg->sync);
ogg->running = FALSE;
ogg->bitrate = 0;
ogg->total_time = -1;
GST_PUSH_LOCK (ogg);
ogg->push_byte_offset = 0;
ogg->push_byte_length = -1;
ogg->push_time_length = GST_CLOCK_TIME_NONE;
ogg->push_time_offset = GST_CLOCK_TIME_NONE;
ogg->push_disable_seeking = FALSE;
ogg->push_state = PUSH_PLAYING;
GST_PUSH_UNLOCK (ogg);
gst_segment_init (&ogg->segment, GST_FORMAT_TIME);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
result = 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:
gst_ogg_demux_clear_chains (ogg);
GST_OBJECT_LOCK (ogg);
ogg->running = FALSE;
GST_OBJECT_UNLOCK (ogg);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
ogg_sync_clear (&ogg->sync);
break;
default:
break;
}
return result;
}
gboolean
gst_ogg_demux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_setup_debug, "oggdemux_setup", 0,
"ogg demuxer setup stage when parsing pipeline");
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif
return gst_element_register (plugin, "oggdemux", GST_RANK_PRIMARY,
GST_TYPE_OGG_DEMUX);
}
/* prints all info about the element */
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT gst_ogg_demux_setup_debug
#ifdef GST_DISABLE_GST_DEBUG
static void
gst_ogg_print (GstOggDemux * ogg)
{
/* NOP */
}
#else /* !GST_DISABLE_GST_DEBUG */
static void
gst_ogg_print (GstOggDemux * ogg)
{
guint j, i;
GST_INFO_OBJECT (ogg, "%u chains", ogg->chains->len);
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->total_time));
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
GST_INFO_OBJECT (ogg, " chain %d (%u streams):", i, chain->streams->len);
GST_INFO_OBJECT (ogg,
" offset: %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT, chain->offset,
chain->end_offset);
GST_INFO_OBJECT (ogg, " begin time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->begin_time));
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->total_time));
GST_INFO_OBJECT (ogg, " segment start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_start));
GST_INFO_OBJECT (ogg, " segment stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_stop));
for (j = 0; j < chain->streams->len; j++) {
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, j);
GST_INFO_OBJECT (ogg, " stream %08x: %s", stream->map.serialno,
gst_ogg_stream_get_media_type (&stream->map));
GST_INFO_OBJECT (ogg, " start time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->start_time));
}
}
}
#endif /* GST_DISABLE_GST_DEBUG */
Reference in a new issue View git blame Copy permalink