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gstreamer/gst/mpegstream/gstmpegdemux.c
Stéphane Loeuillet a74cdc5f34 first batch : remove ',' at end of enums as they could confuse older gcc, foreign compilers (forte) and gtk-doc 
Original commit message from CVS:

first batch :
remove ',' at end of enums as they could confuse older gcc, foreign compilers (forte) and gtk-doc
2004-05-21 22:39:29 +00:00

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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gstmpegdemux.h>
GST_DEBUG_CATEGORY_STATIC (gstmpegdemux_debug);
#define GST_CAT_DEFAULT (gstmpegdemux_debug)
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_SEEK);
#define CLASS(o) GST_MPEG_DEMUX_CLASS (G_OBJECT_GET_CLASS (o))
/* elementfactory information */
static GstElementDetails mpeg_demux_details = {
"MPEG Demuxer",
"Codec/Demuxer",
"Demultiplexes MPEG1 and MPEG2 System Streams",
"Erik Walthinsen <omega@cse.ogi.edu>\n" "Wim Taymans <wim.taymans@chello.be>"
};
/* MPEG2Demux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_BIT_RATE,
ARG_MPEG2
/* FILL ME */
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2 }, " "systemstream = (boolean) TRUE")
);
static GstStaticPadTemplate video_template =
GST_STATIC_PAD_TEMPLATE ("video_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2 }, " "systemstream = (boolean) FALSE")
);
static GstStaticPadTemplate audio_template =
GST_STATIC_PAD_TEMPLATE ("audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("audio/mpeg, " "mpegversion = (int) 1"
/* FIXME "layer = (int) { 1, 2 }" */
)
);
static GstStaticPadTemplate private_template =
GST_STATIC_PAD_TEMPLATE ("private_%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static void gst_mpeg_demux_base_init (GstMPEGDemuxClass * klass);
static void gst_mpeg_demux_class_init (GstMPEGDemuxClass * klass);
static void gst_mpeg_demux_init (GstMPEGDemux * mpeg_demux);
static void gst_mpeg_demux_send_data (GstMPEGParse * mpeg_parse,
GstData * data, GstClockTime time);
static void gst_mpeg_demux_send_discont (GstMPEGParse * mpeg_parse,
GstClockTime time);
static GstPad *gst_mpeg_demux_new_output_pad (GstMPEGDemux * mpeg_demux,
const gchar * name, GstPadTemplate * temp);
static void gst_mpeg_demux_init_stream (GstMPEGDemux * mpeg_demux,
gint type,
GstMPEGStream * str,
gint number, const gchar * name, GstPadTemplate * temp);
static GstMPEGStream *gst_mpeg_demux_get_video_stream (GstMPEGDemux *
mpeg_demux, guint8 stream_nr, gint type, const gpointer info);
static GstMPEGStream *gst_mpeg_demux_get_audio_stream (GstMPEGDemux *
mpeg_demux, guint8 stream_nr, gint type, const gpointer info);
static GstMPEGStream *gst_mpeg_demux_get_private_stream (GstMPEGDemux *
mpeg_demux, guint8 stream_nr, gint type, const gpointer info);
static gboolean gst_mpeg_demux_parse_packhead (GstMPEGParse * mpeg_parse,
GstBuffer * buffer);
static gboolean gst_mpeg_demux_parse_syshead (GstMPEGParse * mpeg_parse,
GstBuffer * buffer);
static gboolean gst_mpeg_demux_parse_packet (GstMPEGParse * mpeg_parse,
GstBuffer * buffer);
static gboolean gst_mpeg_demux_parse_pes (GstMPEGParse * mpeg_parse,
GstBuffer * buffer);
static void gst_mpeg_demux_send_subbuffer (GstMPEGDemux * mpeg_demux,
GstMPEGStream * outstream, GstBuffer * buffer,
GstClockTime timestamp, guint offset, guint size);
static void gst_mpeg_demux_process_private (GstMPEGDemux * mpeg_demux,
GstBuffer * buffer,
guint stream_nr, GstClockTime timestamp, guint headerlen, guint datalen);
const GstFormat *gst_mpeg_demux_get_src_formats (GstPad * pad);
static gboolean index_seek (GstPad * pad, GstEvent * event, gint64 * offset);
static gboolean normal_seek (GstPad * pad, GstEvent * event, gint64 * offset);
static gboolean gst_mpeg_demux_handle_src_event (GstPad * pad,
GstEvent * event);
static GstElementStateReturn gst_mpeg_demux_change_state (GstElement * element);
static void gst_mpeg_demux_set_index (GstElement * element, GstIndex * index);
static GstIndex *gst_mpeg_demux_get_index (GstElement * element);
static GstMPEGParseClass *parent_class = NULL;
/*static guint gst_mpeg_demux_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_mpeg_demux_get_type (void)
{
static GType mpeg_demux_type = 0;
if (!mpeg_demux_type) {
static const GTypeInfo mpeg_demux_info = {
sizeof (GstMPEGDemuxClass),
(GBaseInitFunc) gst_mpeg_demux_base_init,
NULL,
(GClassInitFunc) gst_mpeg_demux_class_init,
NULL,
NULL,
sizeof (GstMPEGDemux),
0,
(GInstanceInitFunc) gst_mpeg_demux_init,
};
mpeg_demux_type =
g_type_register_static (GST_TYPE_MPEG_PARSE, "GstMPEGDemux",
&mpeg_demux_info, 0);
GST_DEBUG_CATEGORY_INIT (gstmpegdemux_debug, "mpegdemux", 0,
"MPEG demultiplexer element");
}
return mpeg_demux_type;
}
static void
gst_mpeg_demux_base_init (GstMPEGDemuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
klass->video_template = gst_static_pad_template_get (&video_template);
klass->audio_template = gst_static_pad_template_get (&audio_template);
klass->private_template = gst_static_pad_template_get (&private_template);
gst_element_class_add_pad_template (element_class, klass->video_template);
gst_element_class_add_pad_template (element_class, klass->audio_template);
gst_element_class_add_pad_template (element_class, klass->private_template);
gst_element_class_set_details (element_class, &mpeg_demux_details);
}
static void
gst_mpeg_demux_class_init (GstMPEGDemuxClass * klass)
{
GstElementClass *gstelement_class;
GstMPEGParseClass *mpeg_parse_class;
parent_class = g_type_class_ref (GST_TYPE_MPEG_PARSE);
gstelement_class = (GstElementClass *) klass;
mpeg_parse_class = (GstMPEGParseClass *) klass;
gstelement_class->change_state = gst_mpeg_demux_change_state;
gstelement_class->set_index = gst_mpeg_demux_set_index;
gstelement_class->get_index = gst_mpeg_demux_get_index;
mpeg_parse_class->parse_packhead = gst_mpeg_demux_parse_packhead;
mpeg_parse_class->parse_syshead = gst_mpeg_demux_parse_syshead;
mpeg_parse_class->parse_packet = gst_mpeg_demux_parse_packet;
mpeg_parse_class->parse_pes = gst_mpeg_demux_parse_pes;
mpeg_parse_class->send_data = gst_mpeg_demux_send_data;
mpeg_parse_class->send_discont = gst_mpeg_demux_send_discont;
klass->new_output_pad = gst_mpeg_demux_new_output_pad;
klass->init_stream = gst_mpeg_demux_init_stream;
klass->get_video_stream = gst_mpeg_demux_get_video_stream;
klass->get_audio_stream = gst_mpeg_demux_get_audio_stream;
klass->get_private_stream = gst_mpeg_demux_get_private_stream;
klass->send_subbuffer = gst_mpeg_demux_send_subbuffer;
klass->process_private = gst_mpeg_demux_process_private;
}
static void
gst_mpeg_demux_init (GstMPEGDemux * mpeg_demux)
{
gint i;
GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (mpeg_demux);
gst_element_remove_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->sinkpad);
mpeg_parse->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
"sink");
gst_element_add_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->sinkpad);
gst_element_remove_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->srcpad);
/* i think everything is already zero'd, but oh well */
for (i = 0; i < GST_MPEG_DEMUX_NUM_VIDEO_STREAMS; i++) {
mpeg_demux->video_stream[i] = NULL;
}
for (i = 0; i < GST_MPEG_DEMUX_NUM_AUDIO_STREAMS; i++) {
mpeg_demux->audio_stream[i] = NULL;
}
for (i = 0; i < GST_MPEG_DEMUX_NUM_PRIVATE_STREAMS; i++) {
mpeg_demux->private_stream[i] = NULL;
}
mpeg_demux->adjust = 0;
GST_FLAG_SET (mpeg_demux, GST_ELEMENT_EVENT_AWARE);
}
static void
gst_mpeg_demux_send_data (GstMPEGParse * mpeg_parse, GstData * data,
GstClockTime time)
{
/* GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); */
if (GST_IS_BUFFER (data)) {
gst_buffer_unref (GST_BUFFER (data));
} else {
GstEvent *event = GST_EVENT (data);
switch (GST_EVENT_TYPE (event)) {
default:
gst_pad_event_default (mpeg_parse->sinkpad, event);
break;
}
}
}
static void
gst_mpeg_demux_send_discont (GstMPEGParse * mpeg_parse, GstClockTime time)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse);
GstEvent *discont;
gint i;
GST_DEBUG_OBJECT (mpeg_demux, "discont %" G_GUINT64_FORMAT, time);
for (i = 0; i < GST_MPEG_DEMUX_NUM_VIDEO_STREAMS; i++) {
if (mpeg_demux->video_stream[i] &&
GST_PAD_IS_USABLE (mpeg_demux->video_stream[i]->pad)) {
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
time, NULL);
gst_pad_push (mpeg_demux->video_stream[i]->pad, GST_DATA (discont));
}
}
for (i = 0; i < GST_MPEG_DEMUX_NUM_AUDIO_STREAMS; i++) {
if (mpeg_demux->audio_stream[i] &&
GST_PAD_IS_USABLE (mpeg_demux->audio_stream[i]->pad)) {
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
time, NULL);
gst_pad_push (mpeg_demux->audio_stream[i]->pad, GST_DATA (discont));
}
}
for (i = 0; i < GST_MPEG_DEMUX_NUM_PRIVATE_STREAMS; i++) {
if (mpeg_demux->private_stream[i] &&
GST_PAD_IS_USABLE (mpeg_demux->private_stream[i]->pad)) {
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
time, NULL);
gst_pad_push (mpeg_demux->private_stream[i]->pad, GST_DATA (discont));
}
}
}
static gint
_demux_get_writer_id (GstIndex * index, GstPad * pad)
{
gint id;
if (!gst_index_get_writer_id (index, GST_OBJECT (pad), &id)) {
GST_CAT_WARNING_OBJECT (GST_CAT_SEEK, index,
"can't get index id for %s:%s", GST_DEBUG_PAD_NAME (pad));
return -1;
} else {
GST_CAT_LOG_OBJECT (GST_CAT_SEEK, index,
"got index id %d for %s:%s", id, GST_DEBUG_PAD_NAME (pad));
return id;
}
}
static GstPad *
gst_mpeg_demux_new_output_pad (GstMPEGDemux * mpeg_demux,
const gchar * name, GstPadTemplate * temp)
{
GstPad *pad;
pad = gst_pad_new_from_template (temp, name);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), pad);
gst_pad_set_formats_function (pad, gst_mpeg_demux_get_src_formats);
gst_pad_set_convert_function (pad, gst_mpeg_parse_convert_src);
gst_pad_set_event_mask_function (pad, gst_mpeg_parse_get_src_event_masks);
gst_pad_set_event_function (pad, gst_mpeg_demux_handle_src_event);
gst_pad_set_query_type_function (pad, gst_mpeg_parse_get_src_query_types);
gst_pad_set_query_function (pad, gst_mpeg_parse_handle_src_query);
gst_pad_use_explicit_caps (pad);
return pad;
}
static void
gst_mpeg_demux_init_stream (GstMPEGDemux * mpeg_demux,
gint type,
GstMPEGStream * str, gint number, const gchar * name, GstPadTemplate * temp)
{
str->type = type;
str->number = number;
str->pad = CLASS (mpeg_demux)->new_output_pad (mpeg_demux, name, temp);
gst_pad_set_element_private (str->pad, str);
if (mpeg_demux->index) {
str->index_id = _demux_get_writer_id (mpeg_demux->index, str->pad);
}
}
static GstMPEGStream *
gst_mpeg_demux_get_video_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
gint mpeg_version = *((gint *) info);
GstMPEGStream *str;
GstMPEGVideoStream *video_str;
gchar *name;
GstCaps *caps;
g_return_val_if_fail (stream_nr < GST_MPEG_DEMUX_NUM_VIDEO_STREAMS, NULL);
g_return_val_if_fail (type > GST_MPEG_DEMUX_VIDEO_UNKNOWN &&
type < GST_MPEG_DEMUX_VIDEO_LAST, NULL);
str = mpeg_demux->video_stream[stream_nr];
if (str == NULL) {
video_str = g_new0 (GstMPEGVideoStream, 1);
str = (GstMPEGStream *) video_str;
str->type = GST_MPEG_DEMUX_VIDEO_UNKNOWN;
name = g_strdup_printf ("video_%02d", stream_nr);
CLASS (mpeg_demux)->init_stream (mpeg_demux, type, str, stream_nr, name,
CLASS (mpeg_demux)->video_template);
g_free (name);
mpeg_demux->video_stream[stream_nr] = str;
} else {
/* This stream may have been created by a derived class, reset the
size. */
video_str = g_renew (GstMPEGVideoStream, str, 1);
mpeg_demux->video_stream[stream_nr] = str = (GstMPEGStream *) video_str;
}
if (str->type != GST_MPEG_DEMUX_VIDEO_MPEG ||
video_str->mpeg_version != mpeg_version) {
/* We need to set new caps for this pad. */
caps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, mpeg_version,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
gst_pad_set_explicit_caps (str->pad, caps);
/* Store the current values. */
str->type = GST_MPEG_DEMUX_VIDEO_MPEG;
video_str->mpeg_version = mpeg_version;
}
return str;
}
static GstMPEGStream *
gst_mpeg_demux_get_audio_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
GstMPEGStream *str;
gchar *name;
GstCaps *caps;
g_return_val_if_fail (stream_nr < GST_MPEG_DEMUX_NUM_AUDIO_STREAMS, NULL);
g_return_val_if_fail (type > GST_MPEG_DEMUX_AUDIO_UNKNOWN &&
type < GST_MPEG_DEMUX_AUDIO_LAST, NULL);
str = mpeg_demux->audio_stream[stream_nr];
if (str == NULL) {
str = g_new0 (GstMPEGStream, 1);
str->type = GST_MPEG_DEMUX_AUDIO_MPEG;
name = g_strdup_printf ("audio_%02d", stream_nr);
CLASS (mpeg_demux)->init_stream (mpeg_demux, type, str, stream_nr, name,
CLASS (mpeg_demux)->audio_template);
g_free (name);
mpeg_demux->audio_stream[stream_nr] = str;
} else {
/* This stream may have been created by a derived class, reset the
size. */
str = g_renew (GstMPEGStream, str, 1);
}
if (str->type != GST_MPEG_DEMUX_AUDIO_MPEG) {
/* We need to set new caps for this pad. */
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1, NULL);
gst_pad_set_explicit_caps (str->pad, caps);
str->type = GST_MPEG_DEMUX_AUDIO_MPEG;
}
return str;
}
static GstMPEGStream *
gst_mpeg_demux_get_private_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
GstMPEGStream *str;
gchar *name;
g_return_val_if_fail (stream_nr < GST_MPEG_DEMUX_NUM_PRIVATE_STREAMS, NULL);
str = mpeg_demux->private_stream[stream_nr];
if (str == NULL) {
name = g_strdup_printf ("private_%d", stream_nr + 1);
str = g_new0 (GstMPEGStream, 1);
CLASS (mpeg_demux)->init_stream (mpeg_demux, type, str, stream_nr, name,
CLASS (mpeg_demux)->private_template);
g_free (name);
mpeg_demux->private_stream[stream_nr] = str;
}
return str;
}
static gboolean
gst_mpeg_demux_parse_packhead (GstMPEGParse * mpeg_parse, GstBuffer * buffer)
{
guint8 *buf;
parent_class->parse_packhead (mpeg_parse, buffer);
buf = GST_BUFFER_DATA (buffer);
/* do something useful here */
return TRUE;
}
static gboolean
gst_mpeg_demux_parse_syshead (GstMPEGParse * mpeg_parse, GstBuffer * buffer)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse);
guint16 header_length;
guchar *buf;
buf = GST_BUFFER_DATA (buffer);
buf += 4;
header_length = GST_READ_UINT16_BE (buf);
GST_DEBUG_OBJECT (mpeg_demux, "header_length %d", header_length);
buf += 2;
/* marker:1==1 ! rate_bound:22 | marker:1==1 */
buf += 3;
/* audio_bound:6==1 ! fixed:1 | constrained:1 */
buf += 1;
/* audio_lock:1 | video_lock:1 | marker:1==1 | video_bound:5 */
buf += 1;
/* apacket_rate_restriction:1 | reserved:7==0x7F */
buf += 1;
if (!GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux)) {
gint stream_count = (header_length - 6) / 3;
gint i, j = 0;
GST_DEBUG_OBJECT (mpeg_demux, "number of streams: %d ", stream_count);
for (i = 0; i < stream_count; i++) {
guint8 stream_id;
gboolean STD_buffer_bound_scale;
guint16 STD_buffer_size_bound;
guint32 buf_byte_size_bound;
GstMPEGStream *outstream = NULL;
stream_id = *buf++;
if (!(stream_id & 0x80)) {
GST_DEBUG_OBJECT (mpeg_demux, "error in system header length");
return FALSE;
}
/* check marker bits */
if ((*buf & 0xC0) != 0xC0) {
GST_DEBUG_OBJECT (mpeg_demux, "expecting placeholder bit values"
" '11' after stream id");
return FALSE;
}
STD_buffer_bound_scale = *buf & 0x20;
STD_buffer_size_bound = ((guint16) (*buf++ & 0x1F)) << 8;
STD_buffer_size_bound |= *buf++;
if (STD_buffer_bound_scale == 0) {
buf_byte_size_bound = STD_buffer_size_bound * 128;
} else {
buf_byte_size_bound = STD_buffer_size_bound * 1024;
}
if (stream_id == 0xBD) {
/* Private stream 1. */
outstream = CLASS (mpeg_demux)->get_private_stream (mpeg_demux,
0, GST_MPEG_DEMUX_PRIVATE_UNKNOWN, NULL);
} else if (stream_id == 0xBF) {
/* Private stream 2. */
outstream = CLASS (mpeg_demux)->get_private_stream (mpeg_demux,
1, GST_MPEG_DEMUX_PRIVATE_UNKNOWN, NULL);
} else if (stream_id >= 0xC0 && stream_id <= 0xDF) {
/* Audio. */
outstream = CLASS (mpeg_demux)->get_audio_stream (mpeg_demux,
stream_id - 0xC0, GST_MPEG_DEMUX_AUDIO_MPEG, NULL);
} else if (stream_id >= 0xE0 && stream_id <= 0xEF) {
/* Video. */
gint mpeg_version = !GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux) ? 1 : 2;
outstream = CLASS (mpeg_demux)->get_video_stream (mpeg_demux,
stream_id - 0xE0, GST_MPEG_DEMUX_VIDEO_MPEG, &mpeg_version);
} else {
GST_WARNING_OBJECT (mpeg_demux, "unknown stream id 0x%02x", stream_id);
}
GST_DEBUG_OBJECT (mpeg_demux, "STD_buffer_bound_scale %d",
STD_buffer_bound_scale);
GST_DEBUG_OBJECT (mpeg_demux, "STD_buffer_size_bound %d or %d bytes",
STD_buffer_size_bound, buf_byte_size_bound);
if (outstream != NULL) {
outstream->size_bound = buf_byte_size_bound;
mpeg_demux->total_size_bound += buf_byte_size_bound;
if (mpeg_demux->index) {
outstream->index_id =
_demux_get_writer_id (mpeg_demux->index, outstream->pad);
}
if (GST_PAD_IS_USABLE (outstream->pad)) {
GstEvent *event;
gint64 time;
time = MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr
+ mpeg_parse->adjust) + mpeg_demux->adjust;
event = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
MPEGTIME_TO_GSTTIME (time), NULL);
gst_pad_push (outstream->pad, GST_DATA (event));
}
}
j++;
}
}
return TRUE;
}
static gboolean
gst_mpeg_demux_parse_packet (GstMPEGParse * mpeg_parse, GstBuffer * buffer)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse);
guint8 id;
guint16 headerlen;
guint16 packet_length;
gboolean STD_buffer_bound_scale;
guint16 STD_buffer_size_bound;
guint64 dts;
gint64 pts = -1;
guint16 datalen;
GstMPEGStream *outstream = NULL;
guint8 *buf, *basebuf;
gint64 timestamp;
basebuf = buf = GST_BUFFER_DATA (buffer);
id = *(buf + 3);
buf += 4;
/* start parsing */
packet_length = GST_READ_UINT16_BE (buf);
GST_DEBUG_OBJECT (mpeg_demux, "got packet_length %d", packet_length);
headerlen = 2;
buf += 2;
/* loop through looping for stuffing bits, STD, PTS, DTS, etc */
do {
guint8 bits = *buf++;
/* stuffing bytes */
switch (bits & 0xC0) {
case 0xC0:
if (bits == 0xff) {
GST_DEBUG_OBJECT (mpeg_demux, "have stuffing byte");
} else {
GST_DEBUG_OBJECT (mpeg_demux, "expected stuffing byte");
}
headerlen++;
break;
case 0x40:
GST_DEBUG_OBJECT (mpeg_demux, "have STD");
STD_buffer_bound_scale = bits & 0x20;
STD_buffer_size_bound = ((guint16) (bits & 0x1F)) << 8;
STD_buffer_size_bound |= *buf++;
headerlen += 2;
break;
case 0x00:
switch (bits & 0x30) {
case 0x20:
/* pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */
pts = ((guint64) (bits & 0x0E)) << 29;
pts |= ((guint64) * buf++) << 22;
pts |= ((guint64) (*buf++ & 0xFE)) << 14;
pts |= ((guint64) * buf++) << 7;
pts |= ((guint64) (*buf++ & 0xFE)) >> 1;
GST_DEBUG_OBJECT (mpeg_demux, "PTS = %" G_GUINT64_FORMAT, pts);
headerlen += 5;
goto done;
case 0x30:
/* pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */
pts = ((guint64) (bits & 0x0E)) << 29;
pts |= ((guint64) * buf++) << 22;
pts |= ((guint64) (*buf++ & 0xFE)) << 14;
pts |= ((guint64) * buf++) << 7;
pts |= ((guint64) (*buf++ & 0xFE)) >> 1;
/* sync:4 ! pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */
dts = ((guint64) (*buf++ & 0x0E)) << 29;
dts |= ((guint64) * buf++) << 22;
dts |= ((guint64) (*buf++ & 0xFE)) << 14;
dts |= ((guint64) * buf++) << 7;
dts |= ((guint64) (*buf++ & 0xFE)) >> 1;
GST_DEBUG_OBJECT (mpeg_demux, "PTS = %" G_GUINT64_FORMAT
", DTS = %" G_GUINT64_FORMAT, pts, dts);
headerlen += 10;
goto done;
case 0x00:
GST_DEBUG_OBJECT (mpeg_demux, "have no pts/dts");
GST_DEBUG_OBJECT (mpeg_demux, "got trailer bits %x", (bits & 0x0f));
if ((bits & 0x0f) != 0xf) {
GST_DEBUG_OBJECT (mpeg_demux, "not a valid packet time sequence");
return FALSE;
}
headerlen++;
default:
goto done;
}
default:
goto done;
}
} while (1);
GST_DEBUG_OBJECT (mpeg_demux, "done with header loop");
done:
/* calculate the amount of real data in this packet */
datalen = packet_length - headerlen + 2;
GST_DEBUG_OBJECT (mpeg_demux, "headerlen is %d, datalen is %d",
headerlen, datalen);
if (pts != -1) {
pts += mpeg_parse->adjust;
timestamp = MPEGTIME_TO_GSTTIME (pts) + mpeg_demux->adjust;
} else {
timestamp = GST_CLOCK_TIME_NONE;
}
if (id == 0xBD) {
/* Private stream 1. */
GST_DEBUG_OBJECT (mpeg_demux, "we have a private 1 packet");
CLASS (mpeg_demux)->process_private (mpeg_demux, buffer, 0, timestamp,
headerlen, datalen);
} else if (id == 0xBF) {
/* Private stream 2. */
GST_DEBUG_OBJECT (mpeg_demux, "we have a private 2 packet");
CLASS (mpeg_demux)->process_private (mpeg_demux, buffer, 1, timestamp,
headerlen, datalen);
} else if (id >= 0xC0 && id <= 0xDF) {
/* Audio. */
GST_DEBUG_OBJECT (mpeg_demux, "we have an audio packet");
outstream = CLASS (mpeg_demux)->get_audio_stream (mpeg_demux,
id - 0xC0, GST_MPEG_DEMUX_AUDIO_MPEG, NULL);
CLASS (mpeg_demux)->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, headerlen + 4, datalen);
} else if (id >= 0xE0 && id <= 0xEF) {
/* Video. */
gint mpeg_version = !GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux) ? 1 : 2;
GST_DEBUG_OBJECT (mpeg_demux, "we have a video packet");
outstream = CLASS (mpeg_demux)->get_video_stream (mpeg_demux,
id - 0xE0, GST_MPEG_DEMUX_VIDEO_MPEG, &mpeg_version);
CLASS (mpeg_demux)->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, headerlen + 4, datalen);
} else {
GST_WARNING_OBJECT (mpeg_demux, "unknown stream id 0x%02x", id);
}
return TRUE;
}
static gboolean
gst_mpeg_demux_parse_pes (GstMPEGParse * mpeg_parse, GstBuffer * buffer)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse);
guint8 id;
guint16 packet_length;
guint8 header_data_length = 0;
guint16 datalen;
guint16 headerlen;
GstClockTime timestamp = GST_CLOCK_TIME_NONE;
GstMPEGStream *outstream = NULL;
guint8 *buf;
buf = GST_BUFFER_DATA (buffer);
id = *(buf + 3);
buf += 4;
/* start parsing */
packet_length = GST_READ_UINT16_BE (buf);
GST_DEBUG_OBJECT (mpeg_demux, "packet_length %d", packet_length);
buf += 2;
/* we don't operate on: program_stream_map, padding_stream, */
/* private_stream_2, ECM, EMM, or program_stream_directory */
if ((id != 0xBC) && (id != 0xBE) && (id != 0xBF) && (id != 0xF0) &&
(id != 0xF1) && (id != 0xFF)) {
guchar flags1 = *buf++;
guchar flags2 = *buf++;
if ((flags1 & 0xC0) != 0x80) {
return FALSE;
}
header_data_length = *buf++;
GST_DEBUG_OBJECT (mpeg_demux, "header_data_length: %d", header_data_length);
/* check for PTS */
if ((flags2 & 0x80)) {
gint64 pts;
pts = ((guint64) (*buf++ & 0x0E)) << 29;
pts |= ((guint64) * buf++) << 22;
pts |= ((guint64) (*buf++ & 0xFE)) << 14;
pts |= ((guint64) * buf++) << 7;
pts |= ((guint64) (*buf++ & 0xFE)) >> 1;
GST_DEBUG_OBJECT (mpeg_demux, "0x%02x PTS = %" G_GUINT64_FORMAT,
id, MPEGTIME_TO_GSTTIME (pts));
pts += mpeg_parse->adjust;
timestamp = MPEGTIME_TO_GSTTIME (pts) + mpeg_demux->adjust;;
} else {
timestamp = GST_CLOCK_TIME_NONE;
}
if ((flags2 & 0x40)) {
GST_DEBUG_OBJECT (mpeg_demux, "%x DTS found", id);
buf += 5;
}
if ((flags2 & 0x20)) {
GST_DEBUG_OBJECT (mpeg_demux, "%x ESCR found", id);
buf += 6;
}
if ((flags2 & 0x10)) {
guint32 es_rate;
es_rate = ((guint32) (*buf++ & 0x07)) << 14;
es_rate |= ((guint32) (*buf++)) << 7;
es_rate |= ((guint32) (*buf++ & 0xFE)) >> 1;
GST_DEBUG_OBJECT (mpeg_demux, "%x ES Rate found", id);
}
/* FIXME: lots of PES parsing missing here... */
/* calculate the amount of real data in this PES packet */
/* constant is 2 bytes packet_length, 2 bytes of bits, 1 byte header len */
headerlen = 5 + header_data_length;
/* constant is 2 bytes of bits, 1 byte header len */
datalen = packet_length - (3 + header_data_length);
} else {
/* Deliver the whole packet. */
/* constant corresponds to the 2 bytes of the packet length. */
headerlen = 2;
datalen = packet_length;
}
GST_DEBUG_OBJECT (mpeg_demux, "headerlen is %d, datalen is %d",
headerlen, datalen);
if (id == 0xBD) {
/* Private stream 1. */
GST_DEBUG_OBJECT (mpeg_demux, "we have a private 1 packet");
CLASS (mpeg_demux)->process_private (mpeg_demux, buffer, 0, timestamp,
headerlen, datalen);
} else if (id == 0xBF) {
/* Private stream 2. */
GST_DEBUG_OBJECT (mpeg_demux, "we have a private 2 packet");
CLASS (mpeg_demux)->process_private (mpeg_demux, buffer, 1, timestamp,
headerlen, datalen);
} else if (id >= 0xC0 && id <= 0xDF) {
/* Audio. */
GST_DEBUG_OBJECT (mpeg_demux, "we have an audio packet");
outstream = CLASS (mpeg_demux)->get_audio_stream (mpeg_demux,
id - 0xC0, GST_MPEG_DEMUX_AUDIO_MPEG, NULL);
CLASS (mpeg_demux)->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, headerlen + 4, datalen);
} else if (id >= 0xE0 && id <= 0xEF) {
/* Video. */
gint mpeg_version = !GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux) ? 1 : 2;
GST_DEBUG_OBJECT (mpeg_demux, "we have a video packet");
outstream = CLASS (mpeg_demux)->get_video_stream (mpeg_demux,
id - 0xE0, GST_MPEG_DEMUX_VIDEO_MPEG, &mpeg_version);
CLASS (mpeg_demux)->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, headerlen + 4, datalen);
} else {
GST_WARNING_OBJECT (mpeg_demux, "unknown stream id 0x%02x", id);
}
return TRUE;
}
static void
gst_mpeg_demux_send_subbuffer (GstMPEGDemux * mpeg_demux,
GstMPEGStream * outstream, GstBuffer * buffer,
GstClockTime timestamp, guint offset, guint size)
{
GstBuffer *outbuf;
if (timestamp != GST_CLOCK_TIME_NONE && mpeg_demux->index != NULL) {
/* Register a new index position. */
gst_index_add_association (mpeg_demux->index,
outstream->index_id, 0,
GST_FORMAT_BYTES,
GST_BUFFER_OFFSET (buffer), GST_FORMAT_TIME, timestamp, 0);
}
if (!GST_PAD_IS_USABLE (outstream->pad) || (size == 0)) {
return;
}
GST_DEBUG_OBJECT (mpeg_demux, "Creating subbuffer size %d", size);
outbuf = gst_buffer_create_sub (buffer, offset, size);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + offset;
gst_pad_push (outstream->pad, GST_DATA (outbuf));
}
static void
gst_mpeg_demux_process_private (GstMPEGDemux * mpeg_demux,
GstBuffer * buffer,
guint stream_nr, GstClockTime timestamp, guint headerlen, guint datalen)
{
GstMPEGStream *outstream;
outstream = CLASS (mpeg_demux)->get_private_stream (mpeg_demux,
stream_nr, GST_MPEG_DEMUX_PRIVATE_UNKNOWN, NULL);
CLASS (mpeg_demux)->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, headerlen + 4, datalen);
}
const GstFormat *
gst_mpeg_demux_get_src_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_TIME, /* we prefer seeking on time */
GST_FORMAT_BYTES,
0
};
return formats;
}
static gboolean
index_seek (GstPad * pad, GstEvent * event, gint64 * offset)
{
GstIndexEntry *entry;
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (gst_pad_get_parent (pad));
GstMPEGStream *stream = gst_pad_get_element_private (pad);
entry = gst_index_get_assoc_entry (mpeg_demux->index, stream->index_id,
GST_INDEX_LOOKUP_BEFORE, 0,
GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event));
if (!entry) {
GST_CAT_WARNING (GST_CAT_SEEK, "%s:%s index %s %" G_GINT64_FORMAT
" -> failed",
GST_DEBUG_PAD_NAME (pad),
gst_format_get_details (GST_EVENT_SEEK_FORMAT (event))->nick,
GST_EVENT_SEEK_OFFSET (event));
return FALSE;
}
if (gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, offset)) {
GST_CAT_DEBUG (GST_CAT_SEEK, "%s:%s index %s %" G_GINT64_FORMAT
" -> %" G_GINT64_FORMAT " bytes",
GST_DEBUG_PAD_NAME (pad),
gst_format_get_details (GST_EVENT_SEEK_FORMAT (event))->nick,
GST_EVENT_SEEK_OFFSET (event), *offset);
return TRUE;
}
return FALSE;
}
static gboolean
normal_seek (GstPad * pad, GstEvent * event, gint64 * offset)
{
gboolean res = FALSE;
gint64 adjust;
GstFormat format;
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (gst_pad_get_parent (pad));
format = GST_EVENT_SEEK_FORMAT (event);
res = gst_pad_convert (pad, GST_FORMAT_BYTES, mpeg_demux->total_size_bound,
&format, &adjust);
if (res) {
*offset = MAX (GST_EVENT_SEEK_OFFSET (event) - adjust, 0);
GST_CAT_DEBUG (GST_CAT_SEEK, "%s:%s guestimate %" G_GINT64_FORMAT
" %s -> %" G_GINT64_FORMAT
" (total_size_bound = %" G_GINT64_FORMAT ")",
GST_DEBUG_PAD_NAME (pad),
GST_EVENT_SEEK_OFFSET (event),
gst_format_get_details (GST_EVENT_SEEK_FORMAT (event))->nick,
*offset, mpeg_demux->total_size_bound);
}
return res;
}
static gboolean
gst_mpeg_demux_handle_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = FALSE;
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
guint64 desired_offset;
if (mpeg_demux->index)
res = index_seek (pad, event, &desired_offset);
if (!res)
res = normal_seek (pad, event, &desired_offset);
if (res) {
GstEvent *new_event;
new_event =
gst_event_new_seek (GST_EVENT_SEEK_TYPE (event), desired_offset);
res = gst_mpeg_parse_handle_src_event (pad, new_event);
}
gst_event_unref (event);
break;
}
case GST_EVENT_NAVIGATION:
return gst_pad_send_event (GST_PAD_PEER (GST_MPEG_PARSE (mpeg_demux)->
sinkpad), event);
break;
default:
gst_event_unref (event);
break;
}
return res;
}
static GstElementStateReturn
gst_mpeg_demux_change_state (GstElement * element)
{
/* GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (element); */
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
static void
gst_mpeg_demux_set_index (GstElement * element, GstIndex * index)
{
GstMPEGDemux *mpeg_demux;
GST_ELEMENT_CLASS (parent_class)->set_index (element, index);
mpeg_demux = GST_MPEG_DEMUX (element);
mpeg_demux->index = index;
}
static GstIndex *
gst_mpeg_demux_get_index (GstElement * element)
{
GstMPEGDemux *mpeg_demux;
mpeg_demux = GST_MPEG_DEMUX (element);
return mpeg_demux->index;
}
gboolean
gst_mpeg_demux_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "mpegdemux",
GST_RANK_PRIMARY, GST_TYPE_MPEG_DEMUX);
}
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