mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-24 10:41:04 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/mpegtsmux/mpegtsmux.c

1692 lines
50 KiB
C
Raw Blame History

/*
* Copyright 2006, 2007, 2008, 2009, 2010 Fluendo S.A.
* Authors: Jan Schmidt <jan@fluendo.com>
* Kapil Agrawal <kapil@fluendo.com>
* Julien Moutte <julien@fluendo.com>
*
* Copyright (C) 2011 Jan Schmidt <thaytan@noraisin.net>
*
* This library is licensed under 4 different licenses and you
* can choose to use it under the terms of any one of them. The
* four licenses are the MPL 1.1, the LGPL, the GPL and the MIT
* license.
*
* MPL:
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* LGPL:
*
* 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.
*
* GPL:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* MIT:
*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <gst/video/video.h>
#include "mpegtsmux.h"
#include "mpegtsmux_aac.h"
#include "mpegtsmux_ttxt.h"
GST_DEBUG_CATEGORY (mpegtsmux_debug);
#define GST_CAT_DEFAULT mpegtsmux_debug
enum
{
ARG_0,
ARG_PROG_MAP,
ARG_M2TS_MODE,
ARG_PAT_INTERVAL,
ARG_PMT_INTERVAL,
ARG_ALIGNMENT
};
#define MPEGTSMUX_DEFAULT_ALIGNMENT -1
#define MPEGTSMUX_DEFAULT_M2TS FALSE
static GstStaticPadTemplate mpegtsmux_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2, 4 }, "
"systemstream = (boolean) false; "
"video/x-dirac;"
"video/x-h264,stream-format=(string)byte-stream;"
"audio/mpeg, "
"mpegversion = (int) { 1, 2 };"
"audio/mpeg, "
"mpegversion = (int) 4, stream-format = (string) { raw, adts };"
"audio/x-lpcm, "
"width = (int) { 16, 20, 24 }, "
"rate = (int) { 48000, 96000 }, "
"channels = (int) [ 1, 8 ], "
"dynamic_range = (int) [ 0, 255 ], "
"emphasis = (boolean) { FALSE, TRUE }, "
"mute = (boolean) { FALSE, TRUE }; " "audio/x-ac3;" "audio/x-dts;"
"subpicture/x-dvb;" "private/teletext"));
static GstStaticPadTemplate mpegtsmux_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpegts, "
"systemstream = (boolean) true, " "packetsize = (int) { 188, 192} ")
);
static void gst_mpegtsmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mpegtsmux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void mpegtsmux_reset (MpegTsMux * mux, gboolean alloc);
static void mpegtsmux_dispose (GObject * object);
static void alloc_packet_cb (GstBuffer ** _buf, void *user_data);
static gboolean new_packet_cb (GstBuffer * buf, void *user_data,
gint64 new_pcr);
static void release_buffer_cb (guint8 * data, void *user_data);
static GstFlowReturn mpegtsmux_collect_packet (MpegTsMux * mux,
GstBuffer * buf);
static GstFlowReturn mpegtsmux_push_packets (MpegTsMux * mux, gboolean force);
static gboolean new_packet_m2ts (MpegTsMux * mux, GstBuffer * buf,
gint64 new_pcr);
static void mpegtsdemux_prepare_srcpad (MpegTsMux * mux);
GstFlowReturn mpegtsmux_clip_inc_running_time (GstCollectPads * pads,
GstCollectData * cdata, GstBuffer * buf, GstBuffer ** outbuf,
gpointer user_data);
static GstFlowReturn mpegtsmux_collected (GstCollectPads * pads,
GstCollectData * data, GstBuffer * buf, MpegTsMux * mux);
static gboolean mpegtsmux_sink_event (GstCollectPads * pads,
GstCollectData * data, GstEvent * event, gpointer user_data);
static GstPad *mpegtsmux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void mpegtsmux_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn mpegtsmux_change_state (GstElement * element,
GstStateChange transition);
static void mpegtsdemux_set_header_on_caps (MpegTsMux * mux);
static gboolean mpegtsmux_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
#if 0
static void mpegtsmux_set_index (GstElement * element, GstIndex * index);
static GstIndex *mpegtsmux_get_index (GstElement * element);
static GstFormat pts_format;
static GstFormat spn_format;
#endif
typedef struct
{
GstMapInfo map_info;
GstBuffer *buffer;
} StreamData;
G_DEFINE_TYPE (MpegTsMux, mpegtsmux, GST_TYPE_ELEMENT)
static StreamData *stream_data_new (GstBuffer * buffer)
{
StreamData *res = g_new (StreamData, 1);
res->buffer = buffer;
gst_buffer_map (buffer, &(res->map_info), GST_MAP_READ);
return res;
}
static void
stream_data_free (StreamData * data)
{
if (data) {
gst_buffer_unmap (data->buffer, &data->map_info);
gst_buffer_unref (data->buffer);
g_free (data);
}
}
#define parent_class mpegtsmux_parent_class
static void
mpegtsmux_class_init (MpegTsMuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&mpegtsmux_sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&mpegtsmux_src_factory));
gst_element_class_set_metadata (gstelement_class,
"MPEG Transport Stream Muxer", "Codec/Muxer",
"Multiplexes media streams into an MPEG Transport Stream",
"Fluendo <contact@fluendo.com>");
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_mpegtsmux_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_mpegtsmux_get_property);
gobject_class->dispose = mpegtsmux_dispose;
gstelement_class->request_new_pad = mpegtsmux_request_new_pad;
gstelement_class->release_pad = mpegtsmux_release_pad;
gstelement_class->change_state = mpegtsmux_change_state;
#if 0
gstelement_class->set_index = GST_DEBUG_FUNCPTR (mpegtsmux_set_index);
gstelement_class->get_index = GST_DEBUG_FUNCPTR (mpegtsmux_get_index);
#endif
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PROG_MAP,
g_param_spec_boxed ("prog-map", "Program map",
"A GstStructure specifies the mapping from elementary streams to programs",
GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_M2TS_MODE,
g_param_spec_boolean ("m2ts-mode", "M2TS(192 bytes) Mode",
"Set to TRUE to output Blu-Ray disc format with 192 byte packets. "
"FALSE for standard TS format with 188 byte packets.",
MPEGTSMUX_DEFAULT_M2TS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PAT_INTERVAL,
g_param_spec_uint ("pat-interval", "PAT interval",
"Set the interval (in ticks of the 90kHz clock) for writing out the PAT table",
1, G_MAXUINT, TSMUX_DEFAULT_PAT_INTERVAL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PMT_INTERVAL,
g_param_spec_uint ("pmt-interval", "PMT interval",
"Set the interval (in ticks of the 90kHz clock) for writing out the PMT table",
1, G_MAXUINT, TSMUX_DEFAULT_PMT_INTERVAL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ALIGNMENT,
g_param_spec_int ("alignment", "packet alignment",
"Number of packets per buffer (padded with dummy packets on EOS) "
"(-1 = auto, 0 = all available packets)",
-1, G_MAXINT, MPEGTSMUX_DEFAULT_ALIGNMENT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
mpegtsmux_init (MpegTsMux * mux)
{
mux->srcpad =
gst_pad_new_from_static_template (&mpegtsmux_src_factory, "src");
gst_pad_use_fixed_caps (mux->srcpad);
gst_pad_set_event_function (mux->srcpad,
GST_DEBUG_FUNCPTR (mpegtsmux_src_event));
gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad);
mux->collect = gst_collect_pads_new ();
gst_collect_pads_set_buffer_function (mux->collect,
(GstCollectPadsBufferFunction) GST_DEBUG_FUNCPTR (mpegtsmux_collected),
mux);
gst_collect_pads_set_event_function (mux->collect,
(GstCollectPadsEventFunction) GST_DEBUG_FUNCPTR (mpegtsmux_sink_event),
mux);
gst_collect_pads_set_clip_function (mux->collect, (GstCollectPadsClipFunction)
GST_DEBUG_FUNCPTR (mpegtsmux_clip_inc_running_time), mux);
mux->tsmux = tsmux_new ();
tsmux_set_write_func (mux->tsmux, new_packet_cb, mux);
mux->adapter = gst_adapter_new ();
mux->out_adapter = gst_adapter_new ();
/* properties */
mux->m2ts_mode = MPEGTSMUX_DEFAULT_M2TS;
mux->pat_interval = TSMUX_DEFAULT_PAT_INTERVAL;
mux->pmt_interval = TSMUX_DEFAULT_PMT_INTERVAL;
mux->prog_map = NULL;
mux->alignment = MPEGTSMUX_DEFAULT_ALIGNMENT;
/* initial state */
mpegtsmux_reset (mux, TRUE);
}
static void
mpegtsmux_pad_reset (MpegTsPadData * pad_data)
{
pad_data->pid = 0;
pad_data->last_pts = GST_CLOCK_TIME_NONE;
pad_data->last_dts = GST_CLOCK_TIME_NONE;
pad_data->prog_id = -1;
#if 0
pad_data->prog_id = -1;
pad_data->element_index_writer_id = -1;
#endif
if (pad_data->free_func)
pad_data->free_func (pad_data->prepare_data);
pad_data->prepare_data = NULL;
pad_data->prepare_func = NULL;
pad_data->free_func = NULL;
if (pad_data->codec_data)
gst_buffer_replace (&pad_data->codec_data, NULL);
/* reference owned elsewhere */
pad_data->stream = NULL;
pad_data->prog = NULL;
}
static void
mpegtsmux_reset (MpegTsMux * mux, gboolean alloc)
{
GSList *walk;
mux->first = TRUE;
mux->last_flow_ret = GST_FLOW_OK;
mux->previous_pcr = -1;
mux->pcr_rate_num = mux->pcr_rate_den = 1;
mux->last_ts = 0;
mux->is_delta = TRUE;
mux->streamheader = NULL;
mux->streamheader_sent = FALSE;
mux->force_key_unit_event = NULL;
mux->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
#if 0
mux->spn_count = 0;
if (mux->element_index) {
gst_object_unref (mux->element_index);
mux->element_index = NULL;
}
#endif
gst_adapter_clear (mux->adapter);
gst_adapter_clear (mux->out_adapter);
if (mux->tsmux) {
tsmux_free (mux->tsmux);
mux->tsmux = NULL;
}
if (mux->streamheader) {
GstBuffer *buf;
GList *sh;
sh = mux->streamheader;
while (sh) {
buf = sh->data;
gst_buffer_unref (buf);
sh = g_list_next (sh);
}
g_list_free (mux->streamheader);
mux->streamheader = NULL;
}
gst_event_replace (&mux->force_key_unit_event, NULL);
gst_buffer_replace (&mux->out_buffer, NULL);
GST_COLLECT_PADS_STREAM_LOCK (mux->collect);
for (walk = mux->collect->data; walk != NULL; walk = g_slist_next (walk))
mpegtsmux_pad_reset ((MpegTsPadData *) walk->data);
GST_COLLECT_PADS_STREAM_UNLOCK (mux->collect);
if (alloc) {
mux->tsmux = tsmux_new ();
tsmux_set_write_func (mux->tsmux, new_packet_cb, mux);
tsmux_set_alloc_func (mux->tsmux, alloc_packet_cb, mux);
}
}
static void
mpegtsmux_dispose (GObject * object)
{
MpegTsMux *mux = GST_MPEG_TSMUX (object);
mpegtsmux_reset (mux, FALSE);
if (mux->adapter) {
g_object_unref (mux->adapter);
mux->adapter = NULL;
}
if (mux->out_adapter) {
g_object_unref (mux->out_adapter);
mux->out_adapter = NULL;
}
if (mux->collect) {
gst_object_unref (mux->collect);
mux->collect = NULL;
}
if (mux->prog_map) {
gst_structure_free (mux->prog_map);
mux->prog_map = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_mpegtsmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
MpegTsMux *mux = GST_MPEG_TSMUX (object);
GSList *walk;
switch (prop_id) {
case ARG_M2TS_MODE:
/*set incase if the output stream need to be of 192 bytes */
mux->m2ts_mode = g_value_get_boolean (value);
break;
case ARG_PROG_MAP:
{
const GstStructure *s = gst_value_get_structure (value);
if (mux->prog_map) {
gst_structure_free (mux->prog_map);
}
if (s)
mux->prog_map = gst_structure_copy (s);
else
mux->prog_map = NULL;
break;
}
case ARG_PAT_INTERVAL:
mux->pat_interval = g_value_get_uint (value);
if (mux->tsmux)
tsmux_set_pat_interval (mux->tsmux, mux->pat_interval);
break;
case ARG_PMT_INTERVAL:
walk = mux->collect->data;
mux->pmt_interval = g_value_get_uint (value);
while (walk) {
MpegTsPadData *ts_data = (MpegTsPadData *) walk->data;
tsmux_set_pmt_interval (ts_data->prog, mux->pmt_interval);
walk = g_slist_next (walk);
}
break;
case ARG_ALIGNMENT:
mux->alignment = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mpegtsmux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
MpegTsMux *mux = GST_MPEG_TSMUX (object);
switch (prop_id) {
case ARG_M2TS_MODE:
g_value_set_boolean (value, mux->m2ts_mode);
break;
case ARG_PROG_MAP:
gst_value_set_structure (value, mux->prog_map);
break;
case ARG_PAT_INTERVAL:
g_value_set_uint (value, mux->pat_interval);
break;
case ARG_PMT_INTERVAL:
g_value_set_uint (value, mux->pmt_interval);
break;
case ARG_ALIGNMENT:
g_value_set_int (value, mux->alignment);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
#if 0
static void
mpegtsmux_set_index (GstElement * element, GstIndex * index)
{
MpegTsMux *mux = GST_MPEG_TSMUX (element);
GST_OBJECT_LOCK (mux);
if (mux->element_index)
gst_object_unref (mux->element_index);
mux->element_index = index ? gst_object_ref (index) : NULL;
GST_OBJECT_UNLOCK (mux);
GST_DEBUG_OBJECT (mux, "Set index %" GST_PTR_FORMAT, mux->element_index);
}
static GstIndex *
mpegtsmux_get_index (GstElement * element)
{
GstIndex *result = NULL;
MpegTsMux *mux = GST_MPEG_TSMUX (element);
GST_OBJECT_LOCK (mux);
if (mux->element_index)
result = gst_object_ref (mux->element_index);
GST_OBJECT_UNLOCK (mux);
GST_DEBUG_OBJECT (mux, "Returning index %" GST_PTR_FORMAT, result);
return result;
}
#endif
static void
release_buffer_cb (guint8 * data, void *user_data)
{
stream_data_free (user_data);
}
static GstFlowReturn
mpegtsmux_create_stream (MpegTsMux * mux, MpegTsPadData * ts_data)
{
GstFlowReturn ret = GST_FLOW_ERROR;
GstCaps *caps;
GstStructure *s;
GstPad *pad;
TsMuxStreamType st = TSMUX_ST_RESERVED;
const gchar *mt;
const GValue *value = NULL;
GstBuffer *codec_data = NULL;
pad = ts_data->collect.pad;
caps = gst_pad_get_current_caps (pad);
if (caps == NULL)
goto not_negotiated;
GST_DEBUG_OBJECT (pad, "Creating stream with PID 0x%04x for caps %"
GST_PTR_FORMAT, ts_data->pid, caps);
s = gst_caps_get_structure (caps, 0);
g_return_val_if_fail (s != NULL, FALSE);
mt = gst_structure_get_name (s);
value = gst_structure_get_value (s, "codec_data");
if (value != NULL)
codec_data = gst_value_get_buffer (value);
if (strcmp (mt, "video/x-dirac") == 0) {
st = TSMUX_ST_VIDEO_DIRAC;
} else if (strcmp (mt, "audio/x-ac3") == 0) {
st = TSMUX_ST_PS_AUDIO_AC3;
} else if (strcmp (mt, "audio/x-dts") == 0) {
st = TSMUX_ST_PS_AUDIO_DTS;
} else if (strcmp (mt, "audio/x-lpcm") == 0) {
st = TSMUX_ST_PS_AUDIO_LPCM;
} else if (strcmp (mt, "video/x-h264") == 0) {
st = TSMUX_ST_VIDEO_H264;
} else if (strcmp (mt, "audio/mpeg") == 0) {
gint mpegversion;
if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) {
GST_ERROR_OBJECT (pad, "caps missing mpegversion");
goto not_negotiated;
}
switch (mpegversion) {
case 1:
st = TSMUX_ST_AUDIO_MPEG1;
break;
case 2:
st = TSMUX_ST_AUDIO_MPEG2;
break;
case 4:
{
st = TSMUX_ST_AUDIO_AAC;
if (codec_data) { /* TODO - Check stream format - codec data should only come with RAW stream */
GST_DEBUG_OBJECT (pad,
"we have additional codec data (%" G_GSIZE_FORMAT " bytes)",
gst_buffer_get_size (codec_data));
ts_data->codec_data = gst_buffer_ref (codec_data);
ts_data->prepare_func = mpegtsmux_prepare_aac;
} else {
ts_data->codec_data = NULL;
}
break;
}
default:
GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion);
goto not_negotiated;
}
} else if (strcmp (mt, "video/mpeg") == 0) {
gint mpegversion;
if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) {
GST_ERROR_OBJECT (pad, "caps missing mpegversion");
goto not_negotiated;
}
switch (mpegversion) {
case 1:
st = TSMUX_ST_VIDEO_MPEG1;
break;
case 2:
st = TSMUX_ST_VIDEO_MPEG2;
break;
case 4:
st = TSMUX_ST_VIDEO_MPEG4;
break;
default:
GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion);
goto not_negotiated;
}
} else if (strcmp (mt, "subpicture/x-dvb") == 0) {
st = TSMUX_ST_PS_DVB_SUBPICTURE;
} else if (strcmp (mt, "private/teletext") == 0) {
st = TSMUX_ST_PS_TELETEXT;
/* needs a particularly sized layout */
ts_data->prepare_func = mpegtsmux_prepare_teletext;
}
if (st != TSMUX_ST_RESERVED) {
ts_data->stream = tsmux_create_stream (mux->tsmux, st, ts_data->pid);
} else {
GST_DEBUG_OBJECT (pad, "Failed to determine stream type");
}
if (ts_data->stream != NULL) {
gst_structure_get_int (s, "rate", &ts_data->stream->audio_sampling);
gst_structure_get_int (s, "channels", &ts_data->stream->audio_channels);
gst_structure_get_int (s, "bitrate", &ts_data->stream->audio_bitrate);
tsmux_stream_set_buffer_release_func (ts_data->stream, release_buffer_cb);
tsmux_program_add_stream (ts_data->prog, ts_data->stream);
ret = GST_FLOW_OK;
}
#if 0
GST_OBJECT_LOCK (mux);
if (mux->element_index) {
gboolean parsed = FALSE;
if (ts_data->stream->is_video_stream) {
if (gst_structure_get_boolean (s, "parsed", &parsed) && parsed) {
if (ts_data->element_index_writer_id == -1) {
gst_index_get_writer_id (mux->element_index, GST_OBJECT (mux),
&ts_data->element_index_writer_id);
GST_DEBUG_OBJECT (mux, "created GstIndex writer_id = %d for stream",
ts_data->element_index_writer_id);
gst_index_add_format (mux->element_index,
ts_data->element_index_writer_id, pts_format);
gst_index_add_format (mux->element_index,
ts_data->element_index_writer_id, spn_format);
}
} else {
GST_WARNING_OBJECT (pad, "no indexing for (unparsed) stream !");
}
}
}
GST_OBJECT_UNLOCK (mux);
#endif
gst_caps_unref (caps);
return ret;
/* ERRORS */
not_negotiated:
{
GST_DEBUG_OBJECT (pad, "Sink pad caps were not set before pushing");
if (caps)
gst_caps_unref (caps);
return GST_FLOW_NOT_NEGOTIATED;
}
}
static GstFlowReturn
mpegtsmux_create_streams (MpegTsMux * mux)
{
GstFlowReturn ret = GST_FLOW_OK;
GSList *walk = mux->collect->data;
/* Create the streams */
while (walk) {
GstCollectData *c_data = (GstCollectData *) walk->data;
MpegTsPadData *ts_data = (MpegTsPadData *) walk->data;
gchar *name = NULL;
walk = g_slist_next (walk);
if (ts_data->prog_id == -1) {
name = GST_PAD_NAME (c_data->pad);
if (mux->prog_map != NULL && gst_structure_has_field (mux->prog_map,
name)) {
gint idx;
gboolean ret = gst_structure_get_int (mux->prog_map, name, &idx);
if (!ret) {
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Reading program map failed. Assuming default"), (NULL));
idx = DEFAULT_PROG_ID;
}
if (idx < 0 || idx >= MAX_PROG_NUMBER) {
GST_DEBUG_OBJECT (mux, "Program number %d associate with pad %s out "
"of range (max = %d); DEFAULT_PROGRAM = %d is used instead",
idx, name, MAX_PROG_NUMBER, DEFAULT_PROG_ID);
idx = DEFAULT_PROG_ID;
}
ts_data->prog_id = idx;
} else {
ts_data->prog_id = DEFAULT_PROG_ID;
}
}
ts_data->prog = mux->programs[ts_data->prog_id];
if (ts_data->prog == NULL) {
ts_data->prog = tsmux_program_new (mux->tsmux);
if (ts_data->prog == NULL)
goto no_program;
tsmux_set_pmt_interval (ts_data->prog, mux->pmt_interval);
mux->programs[ts_data->prog_id] = ts_data->prog;
}
if (ts_data->stream == NULL) {
ret = mpegtsmux_create_stream (mux, ts_data);
if (ret != GST_FLOW_OK)
goto no_stream;
}
}
return GST_FLOW_OK;
/* ERRORS */
no_program:
{
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Could not create new program"), (NULL));
return GST_FLOW_ERROR;
}
no_stream:
{
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Could not create handler for stream"), (NULL));
return ret;
}
}
#define COLLECT_DATA_PAD(collect_data) (((GstCollectData *)(collect_data))->pad)
static gboolean
mpegtsmux_sink_event (GstCollectPads * pads, GstCollectData * data,
GstEvent * event, gpointer user_data)
{
MpegTsMux *mux = GST_MPEG_TSMUX (user_data);
gboolean res = FALSE;
gboolean forward = TRUE;
GstPad *pad;
pad = data->pad;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_DOWNSTREAM:
{
GstClockTime timestamp, stream_time, running_time;
gboolean all_headers;
guint count;
if (!gst_video_event_is_force_key_unit (event))
goto out;
res = TRUE;
forward = FALSE;
gst_video_event_parse_downstream_force_key_unit (event,
&timestamp, &stream_time, &running_time, &all_headers, &count);
GST_INFO_OBJECT (mux, "have downstream force-key-unit event on pad %s, "
"seqnum %d, running-time %" GST_TIME_FORMAT " count %d",
gst_pad_get_name (pad), gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), count);
if (mux->force_key_unit_event != NULL) {
GST_INFO_OBJECT (mux, "skipping downstream force key unit event "
"as an upstream force key unit is already queued");
goto out;
}
if (!all_headers)
goto out;
mux->pending_key_unit_ts = running_time;
gst_event_replace (&mux->force_key_unit_event, event);
break;
}
default:
break;
}
out:
if (!forward)
gst_event_unref (event);
else
res = gst_collect_pads_event_default (pads, data, event, FALSE);
return res;
}
static gboolean
mpegtsmux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
MpegTsMux *mux = GST_MPEG_TSMUX (gst_pad_get_parent (pad));
gboolean res = TRUE, forward = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
{
GstIterator *iter;
GstIteratorResult iter_ret;
GstPad *sinkpad;
GValue sinkpad_value = G_VALUE_INIT;
GstClockTime running_time;
gboolean all_headers, done;
guint count;
if (!gst_video_event_is_force_key_unit (event))
break;
forward = FALSE;
gst_video_event_parse_upstream_force_key_unit (event,
&running_time, &all_headers, &count);
GST_INFO_OBJECT (mux, "received upstream force-key-unit event, "
"seqnum %d running_time %" GST_TIME_FORMAT " all_headers %d count %d",
gst_event_get_seqnum (event), GST_TIME_ARGS (running_time),
all_headers, count);
if (!all_headers)
break;
mux->pending_key_unit_ts = running_time;
gst_event_replace (&mux->force_key_unit_event, event);
iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mux));
done = FALSE;
while (!done) {
gboolean res = FALSE, tmp;
iter_ret = gst_iterator_next (iter, &sinkpad_value);
sinkpad = g_value_get_object (&sinkpad_value);
switch (iter_ret) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
GST_INFO_OBJECT (mux, "forwarding to %s",
gst_pad_get_name (sinkpad));
tmp = gst_pad_push_event (sinkpad, gst_event_ref (event));
GST_INFO_OBJECT (mux, "result %d", tmp);
/* succeed if at least one pad succeeds */
res |= tmp;
break;
case GST_ITERATOR_ERROR:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
break;
}
g_value_reset (&sinkpad_value);
}
g_value_unset (&sinkpad_value);
gst_iterator_free (iter);
break;
}
default:
break;
}
if (forward)
res = gst_pad_event_default (pad, parent, event);
else
gst_event_unref (event);
gst_object_unref (mux);
return res;
}
static GstEvent *
check_pending_key_unit_event (GstEvent * pending_event, GstSegment * segment,
GstClockTime timestamp, guint flags, GstClockTime pending_key_unit_ts)
{
GstClockTime running_time, stream_time;
gboolean all_headers;
guint count;
GstEvent *event = NULL;
g_return_val_if_fail (pending_event != NULL, NULL);
g_return_val_if_fail (segment != NULL, NULL);
if (pending_event == NULL)
goto out;
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
timestamp == GST_CLOCK_TIME_NONE)
goto out;
running_time = gst_segment_to_running_time (segment,
GST_FORMAT_TIME, timestamp);
GST_INFO ("now %" GST_TIME_FORMAT " wanted %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time), GST_TIME_ARGS (pending_key_unit_ts));
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
running_time < pending_key_unit_ts)
goto out;
if (flags & GST_BUFFER_FLAG_DELTA_UNIT) {
GST_INFO ("pending force key unit, waiting for keyframe");
goto out;
}
stream_time = gst_segment_to_stream_time (segment,
GST_FORMAT_TIME, timestamp);
gst_video_event_parse_upstream_force_key_unit (pending_event,
NULL, &all_headers, &count);
event =
gst_video_event_new_downstream_force_key_unit (timestamp, stream_time,
running_time, all_headers, count);
gst_event_set_seqnum (event, gst_event_get_seqnum (pending_event));
out:
return event;
}
GstFlowReturn
mpegtsmux_clip_inc_running_time (GstCollectPads * pads,
GstCollectData * cdata, GstBuffer * buf, GstBuffer ** outbuf,
gpointer user_data)
{
MpegTsPadData *pad_data = (MpegTsPadData *) cdata;
GstClockTime time;
*outbuf = buf;
/* PTS */
time = GST_BUFFER_TIMESTAMP (buf);
/* invalid left alone and passed */
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) {
time = gst_segment_to_running_time (&cdata->segment, GST_FORMAT_TIME, time);
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) {
GST_DEBUG_OBJECT (cdata->pad, "clipping buffer on pad outside segment");
gst_buffer_unref (buf);
*outbuf = NULL;
} else {
GST_LOG_OBJECT (cdata->pad, "buffer pts %" GST_TIME_FORMAT " -> %"
GST_TIME_FORMAT " running time",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (time));
if (GST_CLOCK_TIME_IS_VALID (pad_data->last_pts) &&
time < pad_data->last_pts) {
/* FIXME DTS/PTS mess again;
* probably needs a whole lot more subtle handling (cf qtmux) */
GST_DEBUG_OBJECT (cdata->pad, "ignoring PTS going backward");
time = pad_data->last_pts;
} else {
pad_data->last_pts = time;
}
*outbuf = gst_buffer_make_writable (buf);
GST_BUFFER_TIMESTAMP (*outbuf) = time;
}
}
/* DTS */
time = GST_BUFFER_DTS (buf);
/* invalid left alone and passed */
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) {
time = gst_segment_to_running_time (&cdata->segment, GST_FORMAT_TIME, time);
/* may have to decode out-of-segment, so pass INVALID */
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) {
GST_DEBUG_OBJECT (cdata->pad, "running dts outside segment");
} else {
GST_LOG_OBJECT (cdata->pad, "buffer dts %" GST_TIME_FORMAT " -> %"
GST_TIME_FORMAT " running time",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (time));
if (GST_CLOCK_TIME_IS_VALID (pad_data->last_dts) &&
time < pad_data->last_dts) {
/* FIXME DTS/PTS mess again;
* probably needs a whole lot more subtle handling (cf qtmux) */
GST_WARNING_OBJECT (cdata->pad, "ignoring DTS going backward");
time = pad_data->last_dts;
} else {
pad_data->last_dts = time;
}
*outbuf = gst_buffer_make_writable (buf);
GST_BUFFER_TIMESTAMP (*outbuf) = time;
}
}
buf = *outbuf;
if (pad_data->prepare_func) {
MpegTsMux *mux = (MpegTsMux *) user_data;
buf = pad_data->prepare_func (buf, pad_data, mux);
if (buf)
gst_buffer_replace (outbuf, buf);
}
return GST_FLOW_OK;
}
static GstFlowReturn
mpegtsmux_collected (GstCollectPads * pads, GstCollectData * data,
GstBuffer * buf, MpegTsMux * mux)
{
GstFlowReturn ret = GST_FLOW_OK;
MpegTsPadData *best = (MpegTsPadData *) data;
GST_DEBUG_OBJECT (mux, "Pads collected");
if (G_UNLIKELY (mux->first)) {
ret = mpegtsmux_create_streams (mux);
if (G_UNLIKELY (ret != GST_FLOW_OK))
return ret;
mpegtsdemux_prepare_srcpad (mux);
mux->first = FALSE;
}
if (best != NULL) {
TsMuxProgram *prog = best->prog;
gint64 pts = -1;
guint64 dts = -1;
gboolean delta = TRUE;
StreamData *stream_data;
if (prog == NULL)
goto no_program;
g_assert (buf != NULL);
if (mux->force_key_unit_event != NULL && best->stream->is_video_stream) {
GstEvent *event;
event = check_pending_key_unit_event (mux->force_key_unit_event,
&best->collect.segment, GST_BUFFER_TIMESTAMP (buf),
GST_BUFFER_FLAGS (buf), mux->pending_key_unit_ts);
if (event) {
GstClockTime running_time;
guint count;
GList *cur;
mux->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
gst_event_replace (&mux->force_key_unit_event, NULL);
gst_video_event_parse_downstream_force_key_unit (event,
NULL, NULL, &running_time, NULL, &count);
GST_INFO_OBJECT (mux, "pushing downstream force-key-unit event %d "
"%" GST_TIME_FORMAT " count %d", gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), count);
gst_pad_push_event (mux->srcpad, event);
/* output PAT */
mux->tsmux->last_pat_ts = -1;
/* output PMT for each program */
for (cur = mux->tsmux->programs; cur; cur = cur->next) {
TsMuxProgram *program = (TsMuxProgram *) cur->data;
program->last_pmt_ts = -1;
}
tsmux_program_set_pcr_stream (prog, NULL);
}
}
if (G_UNLIKELY (prog->pcr_stream == NULL)) {
/* Take the first data stream for the PCR */
GST_DEBUG_OBJECT (COLLECT_DATA_PAD (best),
"Use stream (pid=%d) from pad as PCR for program (prog_id = %d)",
MPEG_TS_PAD_DATA (best)->pid, MPEG_TS_PAD_DATA (best)->prog_id);
/* Set the chosen PCR stream */
tsmux_program_set_pcr_stream (prog, best->stream);
}
GST_DEBUG_OBJECT (COLLECT_DATA_PAD (best),
"Chose stream for output (PID: 0x%04x)", best->pid);
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_PTS (buf)) &&
GST_CLOCK_TIME_IS_VALID (best->last_pts)) {
pts = GSTTIME_TO_MPEGTIME (best->last_pts);
GST_DEBUG_OBJECT (mux, "Buffer has PTS %" GST_TIME_FORMAT " pts %"
G_GINT64_FORMAT, GST_TIME_ARGS (best->last_pts), pts);
}
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DTS (buf)) &&
GST_CLOCK_TIME_IS_VALID (best->last_dts)) {
pts = GSTTIME_TO_MPEGTIME (best->last_dts);
GST_DEBUG_OBJECT (mux, "Buffer has DTS %" GST_TIME_FORMAT " dts %"
G_GINT64_FORMAT, GST_TIME_ARGS (best->last_dts), dts);
}
/* should not have a DTS without PTS */
if (pts == -1 && dts != -1) {
GST_DEBUG_OBJECT (mux, "using DTS for unknown PTS");
pts = dts;
}
if (best->stream->is_video_stream) {
delta = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
#if 0
GST_OBJECT_LOCK (mux);
if (mux->element_index && !delta && best->element_index_writer_id != -1) {
gst_index_add_association (mux->element_index,
best->element_index_writer_id,
GST_ASSOCIATION_FLAG_KEY_UNIT, spn_format, mux->spn_count,
pts_format, pts, NULL);
}
GST_OBJECT_UNLOCK (mux);
#endif
}
GST_DEBUG_OBJECT (mux, "delta: %d", delta);
stream_data = stream_data_new (buf);
tsmux_stream_add_data (best->stream, stream_data->map_info.data,
stream_data->map_info.size, stream_data, pts, dts, !delta);
/* outgoing ts follows ts of PCR program stream */
if (prog->pcr_stream == best->stream) {
/* prefer DTS if present for PCR as it should be monotone */
mux->last_ts =
GST_CLOCK_TIME_IS_VALID (best->last_dts) ? best->last_dts : best->
last_pts;
}
mux->is_delta = delta;
mux->last_size = stream_data->map_info.size;
while (tsmux_stream_bytes_in_buffer (best->stream) > 0) {
if (!tsmux_write_stream_packet (mux->tsmux, best->stream)) {
/* Failed writing data for some reason. Set appropriate error */
GST_DEBUG_OBJECT (mux, "Failed to write data packet");
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Failed writing output data to stream %04x", best->stream->id),
(NULL));
goto write_fail;
}
}
/* flush packet cache */
mpegtsmux_push_packets (mux, FALSE);
} else {
/* EOS */
/* drain some possibly cached data */
new_packet_m2ts (mux, NULL, -1);
mpegtsmux_push_packets (mux, TRUE);
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
}
return ret;
/* ERRORS */
write_fail:
{
return mux->last_flow_ret;
}
no_program:
{
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Stream on pad %" GST_PTR_FORMAT
" is not associated with any program", COLLECT_DATA_PAD (best)),
(NULL));
return GST_FLOW_ERROR;
}
}
static GstPad *
mpegtsmux_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name, const GstCaps * caps)
{
MpegTsMux *mux = GST_MPEG_TSMUX (element);
gint pid = -1;
gchar *pad_name = NULL;
GstPad *pad = NULL;
MpegTsPadData *pad_data = NULL;
if (name != NULL && sscanf (name, "sink_%d", &pid) == 1) {
if (tsmux_find_stream (mux->tsmux, pid))
goto stream_exists;
} else {
pid = tsmux_get_new_pid (mux->tsmux);
}
pad_name = g_strdup_printf ("sink_%d", pid);
pad = gst_pad_new_from_template (templ, pad_name);
g_free (pad_name);
pad_data = (MpegTsPadData *)
gst_collect_pads_add_pad (mux->collect, pad, sizeof (MpegTsPadData),
(GstCollectDataDestroyNotify) (mpegtsmux_pad_reset), TRUE);
if (pad_data == NULL)
goto pad_failure;
mpegtsmux_pad_reset (pad_data);
pad_data->pid = pid;
if (G_UNLIKELY (!gst_element_add_pad (element, pad)))
goto could_not_add;
return pad;
/* ERRORS */
stream_exists:
{
GST_ELEMENT_ERROR (element, STREAM, MUX, ("Duplicate PID requested"),
(NULL));
return NULL;
}
could_not_add:
{
GST_ELEMENT_ERROR (element, STREAM, FAILED,
("Internal data stream error."), ("Could not add pad to element"));
gst_collect_pads_remove_pad (mux->collect, pad);
gst_object_unref (pad);
return NULL;
}
pad_failure:
{
GST_ELEMENT_ERROR (element, STREAM, FAILED,
("Internal data stream error."), ("Could not add pad to collectpads"));
gst_object_unref (pad);
return NULL;
}
}
static void
mpegtsmux_release_pad (GstElement * element, GstPad * pad)
{
MpegTsMux *mux = GST_MPEG_TSMUX (element);
GST_DEBUG_OBJECT (mux, "Pad %" GST_PTR_FORMAT " being released", pad);
if (mux->collect) {
gst_collect_pads_remove_pad (mux->collect, pad);
}
/* chain up */
gst_element_remove_pad (element, pad);
}
static void
new_packet_common_init (MpegTsMux * mux, GstBuffer * buf, guint8 * data,
guint len)
{
/* Packets should be at least 188 bytes, but check anyway */
g_return_if_fail (len >= 2 || !data);
if (!mux->streamheader_sent && data) {
guint pid = ((data[1] & 0x1f) << 8) | data[2];
/* if it's a PAT or a PMT */
if (pid == 0x00 || (pid >= TSMUX_START_PMT_PID && pid < TSMUX_START_ES_PID)) {
GstBuffer *hbuf;
if (!buf) {
hbuf = gst_buffer_new_and_alloc (len);
gst_buffer_fill (hbuf, 0, data, len);
} else {
hbuf = gst_buffer_copy (buf);
}
mux->streamheader = g_list_append (mux->streamheader, hbuf);
} else if (mux->streamheader) {
mpegtsdemux_set_header_on_caps (mux);
mux->streamheader_sent = TRUE;
}
}
if (buf) {
if (mux->is_delta) {
GST_LOG_OBJECT (mux, "marking as delta unit");
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
} else {
GST_DEBUG_OBJECT (mux, "marking as non-delta unit");
mux->is_delta = TRUE;
}
}
}
static GstFlowReturn
mpegtsmux_push_packets (MpegTsMux * mux, gboolean force)
{
gint align = mux->alignment;
gint av, packet_size;
GstBuffer *buf;
GstFlowReturn ret = GST_FLOW_OK;
GstClockTime ts;
if (mux->m2ts_mode) {
packet_size = M2TS_PACKET_LENGTH;
if (align < 0)
align = 32;
} else {
packet_size = NORMAL_TS_PACKET_LENGTH;
if (align < 0)
align = 0;
}
av = gst_adapter_available (mux->out_adapter);
GST_LOG_OBJECT (mux, "align %d, av %d", align, av);
if (!align)
align = av;
else
align *= packet_size;
GST_LOG_OBJECT (mux, "aligning to %d bytes", align);
if (G_LIKELY ((align <= av) && av)) {
GST_LOG_OBJECT (mux, "pushing %d aligned bytes", av - (av % align));
ts = gst_adapter_prev_timestamp (mux->out_adapter, NULL);
buf = gst_adapter_take_buffer (mux->out_adapter, av - (av % align));
g_assert (buf);
GST_BUFFER_TIMESTAMP (buf) = ts;
ret = gst_pad_push (mux->srcpad, buf);
av = av % align;
}
if (av && force) {
guint8 *data;
guint32 header;
gint dummy;
GstMapInfo map;
GST_LOG_OBJECT (mux, "handling %d leftover bytes", av);
buf = gst_buffer_new_and_alloc (align);
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data;
ts = gst_adapter_prev_timestamp (mux->out_adapter, NULL);
gst_adapter_copy (mux->out_adapter, data, 0, av);
gst_adapter_clear (mux->out_adapter);
GST_BUFFER_TIMESTAMP (buf) = ts;
data += av;
header = GST_READ_UINT32_BE (data - packet_size);
dummy = (map.size - av) / packet_size;
GST_LOG_OBJECT (mux, "adding %d null packets", dummy);
for (; dummy > 0; dummy--) {
gint offset;
if (packet_size > NORMAL_TS_PACKET_LENGTH) {
GST_WRITE_UINT32_BE (data, header);
/* simply increase header a bit and never mind too much */
header++;
offset = 4;
} else {
offset = 0;
}
GST_WRITE_UINT8 (data + offset, TSMUX_SYNC_BYTE);
/* null packet PID */
GST_WRITE_UINT16_BE (data + offset + 1, 0x1FFF);
/* no adaptation field exists | continuity counter undefined */
GST_WRITE_UINT8 (data + offset + 3, 0x10);
/* payload */
memset (data + offset + 4, 0, NORMAL_TS_PACKET_LENGTH - 4);
data += packet_size;
}
gst_buffer_unmap (buf, &map);
ret = gst_pad_push (mux->srcpad, buf);
}
return ret;
}
static GstFlowReturn
mpegtsmux_collect_packet (MpegTsMux * mux, GstBuffer * buf)
{
GST_LOG_OBJECT (mux, "collecting packet size %" G_GSIZE_FORMAT,
gst_buffer_get_size (buf));
gst_adapter_push (mux->out_adapter, buf);
return GST_FLOW_OK;
}
static gboolean
new_packet_m2ts (MpegTsMux * mux, GstBuffer * buf, gint64 new_pcr)
{
GstBuffer *out_buf;
int chunk_bytes;
GstMapInfo map;
GST_LOG_OBJECT (mux, "Have buffer %p with new_pcr=%" G_GINT64_FORMAT,
buf, new_pcr);
chunk_bytes = gst_adapter_available (mux->adapter);
if (G_LIKELY (buf)) {
if (new_pcr < 0) {
/* If there is no pcr in current ts packet then just add the packet
to the adapter for later output when we see a PCR */
GST_LOG_OBJECT (mux, "Accumulating non-PCR packet");
gst_adapter_push (mux->adapter, buf);
goto exit;
}
/* no first interpolation point yet, then this is the one,
* otherwise it is the second interpolation point */
if (mux->previous_pcr < 0 && chunk_bytes) {
mux->previous_pcr = new_pcr;
mux->previous_offset = chunk_bytes;
GST_LOG_OBJECT (mux, "Accumulating non-PCR packet");
gst_adapter_push (mux->adapter, buf);
goto exit;
}
} else {
g_assert (new_pcr == -1);
}
/* interpolate if needed, and 2 points available */
if (chunk_bytes && (new_pcr != mux->previous_pcr)) {
gint64 offset = 0;
GST_LOG_OBJECT (mux, "Processing pending packets; "
"previous pcr %" G_GINT64_FORMAT ", previous offset %d, "
"current pcr %" G_GINT64_FORMAT ", current offset %d",
mux->previous_pcr, (gint) mux->previous_offset,
new_pcr, (gint) chunk_bytes);
g_assert (chunk_bytes > mux->previous_offset);
/* if draining, use previous rate */
if (G_LIKELY (new_pcr > 0)) {
mux->pcr_rate_num = new_pcr - mux->previous_pcr;
mux->pcr_rate_den = chunk_bytes - mux->previous_offset;
}
while (offset < chunk_bytes) {
guint64 cur_pcr, ts;
/* Loop, pulling packets of the adapter, updating their 4 byte
* timestamp header and pushing */
/* interpolate PCR */
if (G_LIKELY (offset >= mux->previous_offset))
cur_pcr = mux->previous_pcr +
gst_util_uint64_scale (offset - mux->previous_offset,
mux->pcr_rate_num, mux->pcr_rate_den);
else
cur_pcr = mux->previous_pcr -
gst_util_uint64_scale (mux->previous_offset - offset,
mux->pcr_rate_num, mux->pcr_rate_den);
ts = gst_adapter_prev_timestamp (mux->adapter, NULL);
out_buf = gst_adapter_take_buffer (mux->adapter, M2TS_PACKET_LENGTH);
g_assert (out_buf);
offset += M2TS_PACKET_LENGTH;
GST_BUFFER_TIMESTAMP (out_buf) = ts;
gst_buffer_map (out_buf, &map, GST_MAP_WRITE);
/* The header is the bottom 30 bits of the PCR, apparently not
* encoded into base + ext as in the packets themselves */
GST_WRITE_UINT32_BE (map.data, cur_pcr & 0x3FFFFFFF);
gst_buffer_unmap (out_buf, &map);
GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %"
G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, cur_pcr);
mpegtsmux_collect_packet (mux, out_buf);
}
}
if (G_UNLIKELY (!buf))
goto exit;
gst_buffer_map (buf, &map, GST_MAP_WRITE);
/* Finally, output the passed in packet */
/* Only write the bottom 30 bits of the PCR */
GST_WRITE_UINT32_BE (map.data, new_pcr & 0x3FFFFFFF);
gst_buffer_unmap (buf, &map);
GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %"
G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, new_pcr);
mpegtsmux_collect_packet (mux, buf);
if (new_pcr != mux->previous_pcr) {
mux->previous_pcr = new_pcr;
mux->previous_offset = -M2TS_PACKET_LENGTH;
}
exit:
return TRUE;
}
/* Called when the TsMux has prepared a packet for output. Return FALSE
* on error */
static gboolean
new_packet_cb (GstBuffer * buf, void *user_data, gint64 new_pcr)
{
MpegTsMux *mux = (MpegTsMux *) user_data;
gint offset = 0;
GstMapInfo map;
#if 0
GST_LOG_OBJECT (mux, "handling packet %d", mux->spn_count);
mux->spn_count++;
#endif
if (mux->m2ts_mode) {
offset = 4;
gst_buffer_set_size (buf, NORMAL_TS_PACKET_LENGTH + offset);
}
gst_buffer_map (buf, &map, GST_MAP_READWRITE);
if (offset) {
/* there should be a better way to do this */
memmove (map.data + offset, map.data, map.size - offset);
}
GST_BUFFER_PTS (buf) = mux->last_ts;
/* do common init (flags and streamheaders) */
new_packet_common_init (mux, buf, map.data + offset, map.size);
gst_buffer_unmap (buf, &map);
/* all is meant for downstream, including any prefix */
if (offset)
return new_packet_m2ts (mux, buf, new_pcr);
else
mpegtsmux_collect_packet (mux, buf);
return TRUE;
}
/* called when TsMux needs new packet to write into */
static void
alloc_packet_cb (GstBuffer ** _buf, void *user_data)
{
MpegTsMux *mux = (MpegTsMux *) user_data;
GstBuffer *buf;
gint offset = 0;
if (mux->m2ts_mode == TRUE)
offset = 4;
buf = gst_buffer_new_and_alloc (NORMAL_TS_PACKET_LENGTH + offset);
gst_buffer_set_size (buf, NORMAL_TS_PACKET_LENGTH);
*_buf = buf;
}
static void
mpegtsdemux_set_header_on_caps (MpegTsMux * mux)
{
GstBuffer *buf;
GstStructure *structure;
GValue array = { 0 };
GValue value = { 0 };
GstCaps *caps;
GList *sh;
caps = gst_caps_make_writable (gst_pad_get_current_caps (mux->srcpad));
structure = gst_caps_get_structure (caps, 0);
g_value_init (&array, GST_TYPE_ARRAY);
sh = mux->streamheader;
while (sh) {
buf = sh->data;
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_take_buffer (&value, buf);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
sh = g_list_next (sh);
}
g_list_free (mux->streamheader);
mux->streamheader = NULL;
gst_structure_set_value (structure, "streamheader", &array);
gst_pad_set_caps (mux->srcpad, caps);
g_value_unset (&array);
gst_caps_unref (caps);
}
static void
mpegtsdemux_prepare_srcpad (MpegTsMux * mux)
{
GstSegment seg;
/* we are not going to seek */
GstEvent *new_seg;
GstCaps *caps = gst_caps_new_simple ("video/mpegts",
"systemstream", G_TYPE_BOOLEAN, TRUE,
"packetsize", G_TYPE_INT,
(mux->m2ts_mode ? M2TS_PACKET_LENGTH : NORMAL_TS_PACKET_LENGTH),
NULL);
gst_segment_init (&seg, GST_FORMAT_TIME);
new_seg = gst_event_new_segment (&seg);
/* Set caps on src pad from our template and push new segment */
gst_pad_set_caps (mux->srcpad, caps);
gst_caps_unref (caps);
if (!gst_pad_push_event (mux->srcpad, new_seg)) {
GST_WARNING_OBJECT (mux, "New segment event was not handled downstream");
}
}
static GstStateChangeReturn
mpegtsmux_change_state (GstElement * element, GstStateChange transition)
{
MpegTsMux *mux = GST_MPEG_TSMUX (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_collect_pads_start (mux->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_collect_pads_stop (mux->collect);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
mpegtsmux_reset (mux, TRUE);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "mpegtsmux", GST_RANK_PRIMARY,
mpegtsmux_get_type ()))
return FALSE;
GST_DEBUG_CATEGORY_INIT (mpegtsmux_debug, "mpegtsmux", 0,
"MPEG Transport Stream muxer");
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
mpegtsmux, "MPEG-TS muxer",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
Reference in a new issue View git blame Copy permalink