gstreamer/ext/mplex/gstmplex.cc

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#include <string.h>
#include "gstmplex.h"
#include "videostrm.hh"
#include "audiostrm.hh"
/* elementfactory information */
static GstElementDetails gst_mplex_details = {
"MPlex multiplexer",
"Codec/Audio/Decoder",
"GPL",
"multiplex mpeg audio and video into a system stream",
VERSION,
"Wim Taymans <wim.taymans@chello.be> ",
"(C) 2002",
};
/* Sidec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_MUX_FORMAT,
ARG_MUX_BITRATE,
ARG_VIDEO_BUFFER,
ARG_SYNC_OFFSET,
ARG_SECTOR_SIZE,
ARG_VBR,
ARG_PACKETS_PER_PACK,
ARG_SYSTEM_HEADERS,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (src_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"src_video",
"video/mpeg",
"mpegversion", GST_PROPS_INT_RANGE (1, 2),
"systemstream", GST_PROPS_BOOLEAN (TRUE)
)
)
GST_PAD_TEMPLATE_FACTORY (video_sink_factory,
"video_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_CAPS_NEW (
"sink_video",
"video/mpeg",
"mpegversion", GST_PROPS_INT_RANGE (1, 2),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
)
)
GST_PAD_TEMPLATE_FACTORY (audio_sink_factory,
"audio_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_CAPS_NEW (
"sink_audio",
"audio/mpeg",
"layer", GST_PROPS_INT_RANGE (1, 3)
)
)
GST_PAD_TEMPLATE_FACTORY (private_1_sink_factory,
"private_stream_1_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_CAPS_NEW (
"sink_private1",
"audio/x-ac3",
NULL
)
)
GST_PAD_TEMPLATE_FACTORY (private_2_sink_factory,
"private_stream_2",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_CAPS_NEW (
"sink_private2",
"unknown/unknown",
NULL
)
)
#define GST_TYPE_MPLEX_MUX_FORMAT (gst_mplex_mux_format_get_type())
static GType
gst_mplex_mux_format_get_type (void)
{
static GType mplex_mux_format_type = 0;
static GEnumValue mplex_mux_format[] = {
{ MPEG_FORMAT_MPEG1, "0", "Generic MPEG1" },
{ MPEG_FORMAT_VCD, "1", "VCD" },
{ MPEG_FORMAT_VCD_NSR, "2", "user-rate VCD" },
{ MPEG_FORMAT_MPEG2, "3", "Generic MPEG2" },
{ MPEG_FORMAT_SVCD, "4", "SVCD" },
{ MPEG_FORMAT_SVCD_NSR, "5", "user-rate SVCD" },
{ MPEG_FORMAT_VCD_STILL, "6", "VCD Stills" },
{ MPEG_FORMAT_SVCD_STILL, "7", "SVCD Stills" },
{ MPEG_FORMAT_DVD, "8", "DVD" },
{0, NULL, NULL},
};
if (!mplex_mux_format_type) {
mplex_mux_format_type = g_enum_register_static("GstMPlexMuxFormat", mplex_mux_format);
}
return mplex_mux_format_type;
}
static void gst_mplex_class_init (GstMPlex *klass);
static void gst_mplex_init (GstMPlex *mplex);
static GstPad* gst_mplex_request_new_pad (GstElement *element,
GstPadTemplate *templ,
const gchar *req_name);
static void gst_mplex_loop (GstElement *element);
static size_t gst_mplex_read_callback (BitStream *bitstream,
uint8_t *dest, size_t size,
void *user_data);
static size_t gst_mplex_write_callback (PS_Stream *stream,
uint8_t *data, size_t size,
void *user_data);
static void gst_mplex_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_mplex_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static GstElementClass *parent_class = NULL;
//static guint gst_mplex_signals[LAST_SIGNAL] = { 0 };
GType
gst_mplex_get_type (void)
{
static GType mplex_type = 0;
if (!mplex_type) {
static const GTypeInfo mplex_info = {
sizeof(GstMPlexClass),
NULL,
NULL,
(GClassInitFunc) gst_mplex_class_init,
NULL,
NULL,
sizeof(GstMPlex),
0,
(GInstanceInitFunc) gst_mplex_init,
NULL
};
mplex_type = g_type_register_static (GST_TYPE_ELEMENT, "GstMPlex", &mplex_info, (GTypeFlags)0);
}
return mplex_type;
}
static void
gst_mplex_class_init (GstMPlex *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
gobject_class->set_property = gst_mplex_set_property;
gobject_class->get_property = gst_mplex_get_property;
g_object_class_install_property (gobject_class, ARG_MUX_FORMAT,
g_param_spec_enum ("mux_format", "Mux format", "Set defaults for particular MPEG profiles",
GST_TYPE_MPLEX_MUX_FORMAT, MPEG_FORMAT_MPEG1, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_MUX_BITRATE,
g_param_spec_int ("mux_bitrate", "Mux bitrate", "Specify data rate of output stream in kbit/sec"
"(0 = Compute from source streams)",
0, G_MAXINT, 0, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_VIDEO_BUFFER,
g_param_spec_int ("video_buffer", "Video buffer", "Specifies decoder buffers size in kB",
20, 2000, 20, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_SYNC_OFFSET,
g_param_spec_int ("sync_offset", "Sync offset", "Specify offset of timestamps (video-audio) in mSec",
G_MININT, G_MAXINT, 0, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_SECTOR_SIZE,
g_param_spec_int ("sector_size", "Sector size", "Specify sector size in bytes for generic formats",
256, 16384, 2028, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_VBR,
g_param_spec_boolean ("vbr", "VBR", "Multiplex variable bit-rate video",
TRUE, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_PACKETS_PER_PACK,
g_param_spec_int ("packets_per_pack", "Packets per pack",
"Number of packets per pack generic formats",
1, 100, 1, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_SYSTEM_HEADERS,
g_param_spec_boolean ("system_headers", "System headers",
" Create System header in every pack in generic formats",
TRUE, (GParamFlags) G_PARAM_READWRITE));
gstelement_class->request_new_pad = gst_mplex_request_new_pad;
}
static void
gst_mplex_init (GstMPlex *mplex)
{
mplex->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (src_factory), "src");
gst_element_add_pad (GST_ELEMENT (mplex), mplex->srcpad);
gst_element_set_loop_function (GST_ELEMENT (mplex), gst_mplex_loop);
mplex->ostrm = new OutputStream ();
mplex->strms = new vector<ElementaryStream *>();
mplex->state = GST_MPLEX_OPEN_STREAMS;
mplex->ostrm->opt_mux_format = 0;
(void)mjpeg_default_handler_verbosity(mplex->ostrm->opt_verbosity);
}
static GstPadLinkReturn
gst_mplex_video_link (GstPad *pad, GstCaps *caps)
{
GstMPlex *mplex;
gint version;
GstMPlexStream *stream;
mplex = GST_MPLEX (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
stream = (GstMPlexStream *) gst_pad_get_element_private (pad);
if (!gst_caps_get_int (caps, "mpegversion", &version)){
return GST_PAD_LINK_REFUSED;
}
if (version == 2) {
stream->type = GST_MPLEX_STREAM_DVD_VIDEO;
}
else {
stream->type = GST_MPLEX_STREAM_VIDEO;
}
return GST_PAD_LINK_OK;
}
static GstPad*
gst_mplex_request_new_pad (GstElement *element,
GstPadTemplate *templ,
const gchar *req_name)
{
GstMPlexStream *stream;
GstMPlex *mplex;
GstPad *pad = NULL;
mplex = GST_MPLEX (element);
stream = g_new0 (GstMPlexStream, 1);
if (!strncmp (templ->name_template, "audio", 5)) {
gchar *name = g_strdup_printf (templ->name_template, mplex->num_audio);
pad = gst_pad_new (name, GST_PAD_SINK);
g_free (name);
stream->type = GST_MPLEX_STREAM_MPA;
}
else if (!strncmp (templ->name_template, "video", 5)) {
gchar *name = g_strdup_printf (templ->name_template, mplex->num_video);
pad = gst_pad_new (name, GST_PAD_SINK);
/* we still need to figure out the mpeg version */
gst_pad_set_link_function (pad, gst_mplex_video_link);
g_free (name);
stream->type = GST_MPLEX_STREAM_UNKOWN;
}
else if (!strncmp (templ->name_template, "private_stream_1", 16)) {
gchar *name = g_strdup_printf (templ->name_template, mplex->num_private1);
pad = gst_pad_new (name, GST_PAD_SINK);
g_free (name);
stream->type = GST_MPLEX_STREAM_AC3;
}
else if (!strncmp (templ->name_template, "private_stream_2", 16)) {
pad = gst_pad_new ("private_stream_2", GST_PAD_SINK);
stream->type = GST_MPLEX_STREAM_UNKOWN;
}
if (pad) {
stream->pad = pad;
stream->bitstream = new IBitStream();
stream->bytestream = gst_bytestream_new (pad);
stream->eos = FALSE;
mplex->streams = g_list_prepend (mplex->streams, stream);
gst_element_add_pad (element, pad);
gst_pad_set_element_private (pad, stream);
}
else {
/* no pad, free our stream again */
g_free (stream);
}
return pad;
}
static size_t
gst_mplex_read_callback (BitStream *bitstream, uint8_t *dest, size_t size, void *user_data)
{
GstMPlexStream *stream;
guint8 *data;
guint32 len;
stream = (GstMPlexStream *) user_data;
if (stream->eos)
return 0;
do {
len = gst_bytestream_peek_bytes (stream->bytestream, &data, size);
if (len < size) {
guint32 avail= 0;
GstEvent *event = NULL;
gst_bytestream_get_status (stream->bytestream, &avail, &event);
if (event != NULL) {
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
stream->eos = TRUE;
break;
default:
break;
}
gst_event_unref (event);
}
}
}
while (len == 0);
memcpy (dest, data, len);
gst_bytestream_flush_fast (stream->bytestream, len);
return len;
}
static size_t
gst_mplex_write_callback (PS_Stream *stream, uint8_t *data, size_t size, void *user_data)
{
GstMPlex *mplex;
GstBuffer *outbuf;
mplex = GST_MPLEX (user_data);
if (GST_PAD_IS_USABLE (mplex->srcpad)) {
outbuf = gst_buffer_new_and_alloc (size);
memcpy (GST_BUFFER_DATA (outbuf), data, size);
gst_pad_push (mplex->srcpad, GST_DATA (outbuf));
}
return size;
}
static void
gst_mplex_loop (GstElement *element)
{
GstMPlex *mplex;
mplex = GST_MPLEX (element);
switch (mplex->state) {
case GST_MPLEX_OPEN_STREAMS:
{
mplex->ostrm->InitSyntaxParameters();
GList *walk = mplex->streams;
while (walk) {
GstMPlexStream *stream = (GstMPlexStream *) walk->data;
stream->bitstream->open (gst_mplex_read_callback, stream);
switch (stream->type) {
case GST_MPLEX_STREAM_MPA:
{
MPAStream *mpastream;
mpastream = new MPAStream(*stream->bitstream, *mplex->ostrm);
mpastream->Init(0);
stream->elem_stream = mpastream;
break;
}
case GST_MPLEX_STREAM_AC3:
{
AC3Stream *ac3stream;
ac3stream = new AC3Stream(*stream->bitstream, *mplex->ostrm);
ac3stream->Init(0);
stream->elem_stream = ac3stream;
break;
}
case GST_MPLEX_STREAM_DVD_VIDEO:
{
DVDVideoStream *dvdstream;
dvdstream = new DVDVideoStream(*stream->bitstream, *mplex->ostrm);
dvdstream->Init(0);
stream->elem_stream = dvdstream;
break;
}
case GST_MPLEX_STREAM_VIDEO:
{
VideoStream *videostream;
videostream = new VideoStream(*stream->bitstream, *mplex->ostrm);
videostream->Init(0);
stream->elem_stream = videostream;
break;
}
default:
break;
}
mplex->strms->push_back(stream->elem_stream);
walk = g_list_next (walk);
}
mplex->ps_stream = new PS_Stream (gst_mplex_write_callback, mplex);
mplex->ostrm->Init (mplex->strms, mplex->ps_stream);
/* move to running state after this */
mplex->state = GST_MPLEX_RUN;
break;
}
case GST_MPLEX_RUN:
if (!mplex->ostrm->OutputMultiplex()) {
mplex->state = GST_MPLEX_END;
}
break;
case GST_MPLEX_END:
{
mplex->ostrm->Close ();
gst_pad_push (mplex->srcpad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
gst_element_set_eos (element);
break;
}
default:
break;
}
}
static void
gst_mplex_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstMPlex *mplex;
mplex = GST_MPLEX(object);
switch(prop_id) {
case ARG_MUX_FORMAT:
mplex->ostrm->opt_mux_format = g_value_get_enum (value);
break;
case ARG_MUX_BITRATE:
mplex->data_rate = g_value_get_int (value);
mplex->ostrm->opt_data_rate = ((mplex->data_rate * 1000 / 8 + 49) / 50) * 50;
break;
case ARG_VIDEO_BUFFER:
mplex->ostrm->opt_buffer_size = g_value_get_int (value);
break;
case ARG_SYNC_OFFSET:
{
mplex->sync_offset = g_value_get_int (value);
if (mplex->sync_offset < 0) {
mplex->ostrm->opt_audio_offset = -mplex->sync_offset;
mplex->ostrm->opt_video_offset = 0;
}
else {
mplex->ostrm->opt_video_offset = mplex->sync_offset;
}
break;
}
case ARG_SECTOR_SIZE:
mplex->ostrm->opt_sector_size = g_value_get_int (value);
break;
case ARG_VBR:
mplex->ostrm->opt_VBR = g_value_get_boolean (value);
break;
case ARG_PACKETS_PER_PACK:
mplex->ostrm->opt_packets_per_pack = g_value_get_int (value);
break;
case ARG_SYSTEM_HEADERS:
mplex->ostrm->opt_always_system_headers = g_value_get_boolean (value);
break;
default:
//G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
return;
}
}
static void
gst_mplex_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstMPlex *mplex;
mplex = GST_MPLEX(object);
switch(prop_id) {
case ARG_MUX_FORMAT:
g_value_set_enum (value, mplex->ostrm->opt_mux_format);
break;
case ARG_MUX_BITRATE:
g_value_set_int (value, mplex->data_rate);
break;
case ARG_VIDEO_BUFFER:
g_value_set_int (value, mplex->ostrm->opt_buffer_size);
break;
case ARG_SYNC_OFFSET:
g_value_set_int (value, mplex->sync_offset);
break;
case ARG_SECTOR_SIZE:
g_value_set_int (value, mplex->ostrm->opt_sector_size);
break;
case ARG_VBR:
g_value_set_boolean (value, mplex->ostrm->opt_VBR);
break;
case ARG_PACKETS_PER_PACK:
g_value_set_int (value, mplex->ostrm->opt_packets_per_pack);
break;
case ARG_SYSTEM_HEADERS:
g_value_set_boolean (value, mplex->ostrm->opt_always_system_headers);
break;
default:
//G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* this filter needs the bytestream package */
if (!gst_library_load ("gstbytestream"))
return FALSE;
/* create an elementfactory for the avi_demux element */
factory = gst_element_factory_new ("mplex",GST_TYPE_MPLEX,
&gst_mplex_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_NONE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (audio_sink_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (video_sink_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (private_1_sink_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (private_2_sink_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mplex",
plugin_init
};