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gstreamer/gst/mpegstream/gstdvddemux.c
Vincent Penquerc'h 7e6125fc8f mpegstream: increase allowable gap between streams 
The new delay is three times as much as the old one, and just happens
to let me properly decode my "Princess Mononoke" DVD, on which dvdreadsrc
was chocking before at 5:11.
While there, merge the constants used in two places into a define.

https://bugzilla.gnome.org/show_bug.cgi?id=539708
2011-01-24 19:44:41 +01:00

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/* GStreamer
* Copyright (C) 2005 Martin Soto <martinsoto@users.sourceforge.net>
*
* 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 <string.h>
#include "gstdvddemux.h"
/*
* Move PTM discont back by 0.3 seconds to allow for strange audio
* timestamps when audio crosses a VOBU
*/
#define PTM_DISCONT_ADJUST (0.3 * GST_SECOND)
#define INITIAL_END_PTM (-1)
#define MAX_GAP ( 3 * GST_SECOND / 2 )
#define MAX_GAP_TOLERANCE ( GST_SECOND / 20 )
GST_DEBUG_CATEGORY_STATIC (gstdvddemux_debug);
#define GST_CAT_DEFAULT (gstdvddemux_debug)
#define PARSE_CLASS(o) GST_MPEG_PARSE_CLASS (G_OBJECT_GET_CLASS (o))
#define DEMUX_CLASS(o) GST_MPEG_DEMUX_CLASS (G_OBJECT_GET_CLASS (o))
#define CLASS(o) GST_DVD_DEMUX_CLASS (G_OBJECT_GET_CLASS (o))
/* DVDDemux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
/* Define the capabilities separately, to be able to reuse them. */
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) 2, " "systemstream = (boolean) TRUE")
);
#define VIDEO_CAPS \
GST_STATIC_CAPS ("video/mpeg, " \
"mpegversion = (int) { 1, 2 }, " \
"systemstream = (boolean) FALSE" \
)
#define AUDIO_CAPS \
GST_STATIC_CAPS ( \
"audio/mpeg, " \
"mpegversion = (int) 1;" \
"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" \
)
#define SUBPICTURE_CAPS \
GST_STATIC_CAPS ("video/x-dvd-subpicture")
static GstStaticPadTemplate cur_video_template =
GST_STATIC_PAD_TEMPLATE ("current_video",
GST_PAD_SRC,
GST_PAD_ALWAYS,
VIDEO_CAPS);
static GstStaticPadTemplate audio_template =
GST_STATIC_PAD_TEMPLATE ("dvd_audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
AUDIO_CAPS);
static GstStaticPadTemplate cur_audio_template =
GST_STATIC_PAD_TEMPLATE ("current_audio",
GST_PAD_SRC,
GST_PAD_ALWAYS,
AUDIO_CAPS);
static GstStaticPadTemplate subpicture_template =
GST_STATIC_PAD_TEMPLATE ("subpicture_%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
SUBPICTURE_CAPS);
static GstStaticPadTemplate cur_subpicture_template =
GST_STATIC_PAD_TEMPLATE ("current_subpicture",
GST_PAD_SRC,
GST_PAD_ALWAYS,
SUBPICTURE_CAPS);
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gstdvddemux_debug, "dvddemux", 0, \
"DVD (VOB) demultiplexer element");
GST_BOILERPLATE_FULL (GstDVDDemux, gst_dvd_demux, GstMPEGDemux,
GST_TYPE_MPEG_DEMUX, _do_init);
static gboolean gst_dvd_demux_process_event (GstMPEGParse * mpeg_parse,
GstEvent * event);
static gboolean gst_dvd_demux_parse_packhead (GstMPEGParse * mpeg_parse,
GstBuffer * buffer);
static gboolean gst_dvd_demux_handle_dvd_event
(GstDVDDemux * dvd_demux, GstEvent * event);
static GstMPEGStream *gst_dvd_demux_get_video_stream
(GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info);
static GstMPEGStream *gst_dvd_demux_get_audio_stream
(GstMPEGDemux * dvd_demux,
guint8 stream_nr, gint type, const gpointer info);
static GstMPEGStream *gst_dvd_demux_get_subpicture_stream
(GstMPEGDemux * dvd_demux,
guint8 stream_nr, gint type, const gpointer info);
static GstFlowReturn gst_dvd_demux_process_private
(GstMPEGDemux * mpeg_demux,
GstBuffer * buffer,
guint stream_nr, GstClockTime timestamp, guint headerlen, guint datalen);
static GstFlowReturn gst_dvd_demux_send_subbuffer
(GstMPEGDemux * mpeg_demux,
GstMPEGStream * outstream,
GstBuffer * buffer, GstClockTime timestamp, guint offset, guint size);
static GstFlowReturn gst_dvd_demux_combine_flows (GstMPEGDemux * mpegdemux,
GstMPEGStream * stream, GstFlowReturn flow);
static void gst_dvd_demux_set_cur_audio
(GstDVDDemux * dvd_demux, gint stream_nr);
static void gst_dvd_demux_set_cur_subpicture
(GstDVDDemux * dvd_demux, gint stream_nr);
static void gst_dvd_demux_reset (GstDVDDemux * dvd_demux);
static void gst_dvd_demux_synchronise_pads (GstMPEGDemux * mpeg_demux,
GstClockTime threshold, GstClockTime new_ts);
static void gst_dvd_demux_sync_stream_to_time (GstMPEGDemux * mpeg_demux,
GstMPEGStream * stream, GstClockTime last_ts);
static GstStateChangeReturn gst_dvd_demux_change_state (GstElement * element,
GstStateChange transition);
/*static guint gst_dvd_demux_signals[LAST_SIGNAL] = { 0 };*/
static void
gst_dvd_demux_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstMPEGParseClass *mpeg_parse_class = GST_MPEG_PARSE_CLASS (klass);
GstMPEGDemuxClass *demux_class = GST_MPEG_DEMUX_CLASS (klass);
GstDVDDemuxClass *dvd_demux_class = GST_DVD_DEMUX_CLASS (klass);
mpeg_parse_class->send_buffer = NULL;
mpeg_parse_class->process_event = gst_dvd_demux_process_event;
mpeg_parse_class->parse_packhead = gst_dvd_demux_parse_packhead;
/* sink pad */
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
demux_class->audio_template = gst_static_pad_template_get (&audio_template);
dvd_demux_class->cur_video_template =
gst_static_pad_template_get (&cur_video_template);
dvd_demux_class->cur_audio_template =
gst_static_pad_template_get (&cur_audio_template);
dvd_demux_class->subpicture_template =
gst_static_pad_template_get (&subpicture_template);
dvd_demux_class->cur_subpicture_template =
gst_static_pad_template_get (&cur_subpicture_template);
gst_element_class_add_pad_template (element_class,
demux_class->audio_template);
gst_element_class_add_pad_template (element_class,
dvd_demux_class->cur_video_template);
gst_element_class_add_pad_template (element_class,
dvd_demux_class->cur_audio_template);
gst_element_class_add_pad_template (element_class,
dvd_demux_class->subpicture_template);
gst_element_class_add_pad_template (element_class,
dvd_demux_class->cur_subpicture_template);
gst_element_class_set_details_simple (element_class, "DVD Demuxer",
"Codec/Demuxer",
"Demultiplexes DVD (VOB) MPEG2 streams",
"Martin Soto <martinsoto@users.sourceforge.net>");
}
static void
gst_dvd_demux_class_init (GstDVDDemuxClass * klass)
{
GstElementClass *gstelement_class;
GstMPEGDemuxClass *mpeg_demux_class;
parent_class = g_type_class_peek_parent (klass);
gstelement_class = (GstElementClass *) klass;
mpeg_demux_class = (GstMPEGDemuxClass *) klass;
gstelement_class->change_state = gst_dvd_demux_change_state;
mpeg_demux_class->get_audio_stream = gst_dvd_demux_get_audio_stream;
mpeg_demux_class->get_video_stream = gst_dvd_demux_get_video_stream;
mpeg_demux_class->send_subbuffer = gst_dvd_demux_send_subbuffer;
mpeg_demux_class->combine_flows = gst_dvd_demux_combine_flows;
mpeg_demux_class->process_private = gst_dvd_demux_process_private;
mpeg_demux_class->synchronise_pads = gst_dvd_demux_synchronise_pads;
mpeg_demux_class->sync_stream_to_time = gst_dvd_demux_sync_stream_to_time;
klass->get_subpicture_stream = gst_dvd_demux_get_subpicture_stream;
}
static void
gst_dvd_demux_init (GstDVDDemux * dvd_demux, GstDVDDemuxClass * klass)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (dvd_demux);
gint i;
/* Create the pads for the current streams. */
dvd_demux->cur_video =
DEMUX_CLASS (dvd_demux)->new_output_pad (mpeg_demux, "current_video",
CLASS (dvd_demux)->cur_video_template);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), dvd_demux->cur_video);
dvd_demux->cur_audio =
DEMUX_CLASS (dvd_demux)->new_output_pad (mpeg_demux, "current_audio",
CLASS (dvd_demux)->cur_audio_template);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), dvd_demux->cur_audio);
dvd_demux->cur_subpicture =
DEMUX_CLASS (dvd_demux)->new_output_pad (mpeg_demux, "current_subpicture",
CLASS (dvd_demux)->cur_subpicture_template);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), dvd_demux->cur_subpicture);
dvd_demux->mpeg_version = 0;
dvd_demux->cur_video_nr = 0;
dvd_demux->cur_audio_nr = 0;
dvd_demux->cur_subpicture_nr = 0;
for (i = 0; i < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS; i++) {
dvd_demux->subpicture_stream[i] = NULL;
}
/* Directly after starting we operate as if we had just flushed. */
dvd_demux->segment_filter = TRUE;
dvd_demux->langcodes = NULL;
}
static gboolean
gst_dvd_demux_process_event (GstMPEGParse * mpeg_parse, GstEvent * event)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_parse);
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
gst_event_parse_new_segment (event, &update, NULL, NULL,
NULL, NULL, NULL);
if (!update) {
/* This is a discontinuity in the timestamp sequence. which
may mean that we find some audio blocks lying outside the
segment. Filter them. */
dvd_demux->segment_filter = TRUE;
/* reset stream synchronization; parent handles other streams */
gst_mpeg_streams_reset_cur_ts (dvd_demux->subpicture_stream,
GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS, 0);
}
ret = GST_MPEG_PARSE_CLASS (parent_class)->process_event (mpeg_parse,
event);
break;
}
case GST_EVENT_FLUSH_STOP:
dvd_demux->segment_filter = TRUE;
ret = GST_MPEG_PARSE_CLASS (parent_class)->process_event (mpeg_parse,
event);
/* parent class will have reset the other streams */
gst_mpeg_streams_reset_last_flow (dvd_demux->subpicture_stream,
GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS);
break;
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
if (event->structure != NULL &&
gst_structure_has_name (event->structure, "application/x-gst-dvd")) {
ret = gst_dvd_demux_handle_dvd_event (dvd_demux, event);
} else {
ret = GST_MPEG_PARSE_CLASS (parent_class)->process_event (mpeg_parse,
event);
}
break;
default:
ret = GST_MPEG_PARSE_CLASS (parent_class)->process_event (mpeg_parse,
event);
break;
}
return ret;
}
static gboolean
gst_dvd_demux_handle_dvd_event (GstDVDDemux * dvd_demux, GstEvent * event)
{
GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (dvd_demux);
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (dvd_demux);
const GstStructure *structure = gst_event_get_structure (event);
const char *event_type = gst_structure_get_string (structure, "event");
g_return_val_if_fail (event != NULL, FALSE);
GST_LOG_OBJECT (dvd_demux, "dvd event %" GST_PTR_FORMAT, structure);
if (strcmp (event_type, "dvd-audio-stream-change") == 0) {
gint stream_nr;
gst_structure_get_int (structure, "physical", &stream_nr);
if (stream_nr < -1 || stream_nr >= GST_MPEG_DEMUX_NUM_AUDIO_STREAMS) {
GST_ERROR_OBJECT (dvd_demux,
"GstDVDDemux: Invalid audio stream %02d", stream_nr);
return FALSE;
}
gst_dvd_demux_set_cur_audio (dvd_demux, stream_nr);
gst_event_unref (event);
} else if (strcmp (event_type, "dvd-spu-stream-change") == 0) {
gint stream_nr;
gst_structure_get_int (structure, "physical", &stream_nr);
if (stream_nr < -1 || stream_nr >= GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS) {
GST_ERROR_OBJECT (dvd_demux,
"GstDVDDemux: Invalid subpicture stream %02d", stream_nr);
return FALSE;
}
gst_dvd_demux_set_cur_subpicture (dvd_demux, stream_nr);
gst_event_unref (event);
} else if (!strcmp (event_type, "dvd-lang-codes")) {
gint num_substreams = 0, num_audstreams = 0, n;
gchar *t;
/* reset */
if (dvd_demux->langcodes)
gst_event_unref (dvd_demux->langcodes);
/* see what kind of streams we have */
dvd_demux->langcodes = event;
/* now create pads for each; first video */
n = 2;
DEMUX_CLASS (dvd_demux)->get_video_stream (mpeg_demux,
0, GST_MPEG_DEMUX_VIDEO_MPEG, &n);
/* audio */
for (n = 0;; n++) {
gint fmt, ifo = 0;
t = g_strdup_printf ("audio-%d-format", num_audstreams);
if (!gst_structure_get_int (structure, t, &fmt)) {
g_free (t);
break;
}
g_free (t);
switch (fmt) {
case 0x0: /* AC-3 */
fmt = GST_DVD_DEMUX_AUDIO_AC3;
break;
case 0x2:
case 0x3: /* MPEG */
fmt = GST_MPEG_DEMUX_AUDIO_MPEG;
break;
case 0x4:
fmt = GST_DVD_DEMUX_AUDIO_LPCM;
break;
case 0x6:
fmt = GST_DVD_DEMUX_AUDIO_DTS;
break;
default:
fmt = GST_MPEG_DEMUX_AUDIO_UNKNOWN;
break;
}
DEMUX_CLASS (dvd_demux)->get_audio_stream (mpeg_demux,
num_audstreams++, fmt, &ifo);
}
/* subtitle */
for (;;) {
t = g_strdup_printf ("subtitle-%d-language", num_substreams);
if (!gst_structure_get_value (structure, t)) {
g_free (t);
break;
}
g_free (t);
CLASS (dvd_demux)->get_subpicture_stream (mpeg_demux,
num_substreams++, GST_DVD_DEMUX_SUBP_DVD, NULL);
}
GST_DEBUG_OBJECT (dvd_demux,
"Created 1 video stream, %d audio streams and %d subpicture streams "
"based on DVD lang codes event; now signalling no-more-pads",
num_audstreams, num_substreams);
/* we know this will be all */
gst_element_no_more_pads (GST_ELEMENT (dvd_demux));
/* Keep video/audio/subtitle pads within 1/2 sec of the SCR */
mpeg_demux->max_gap = MAX_GAP;
mpeg_demux->max_gap_tolerance = MAX_GAP_TOLERANCE;
} else {
GST_DEBUG_OBJECT (dvd_demux, "dvddemux Forwarding DVD event %s to all pads",
event_type);
PARSE_CLASS (dvd_demux)->send_event (mpeg_parse, event);
}
return TRUE;
}
static GstMPEGStream *
gst_dvd_demux_get_video_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
GstMPEGStream *str =
parent_class->get_video_stream (mpeg_demux, stream_nr, type, info);
gint mpeg_version = *((gint *) info);
if (dvd_demux->mpeg_version != mpeg_version) {
if (str->caps)
gst_caps_unref (str->caps);
str->caps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, mpeg_version,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
if (!gst_pad_set_caps (dvd_demux->cur_video, str->caps)) {
GST_ELEMENT_ERROR (GST_ELEMENT (mpeg_demux),
CORE, NEGOTIATION, (NULL), ("failed to set caps"));
gst_caps_unref (str->caps);
str->caps = NULL;
return str;
} else {
dvd_demux->mpeg_version = mpeg_version;
}
}
dvd_demux->mpeg_version = mpeg_version;
return str;
}
static GstMPEGStream *
gst_dvd_demux_get_audio_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
guint32 sample_info = 0;
GstMPEGStream *str;
GstDVDLPCMStream *lpcm_str = NULL;
gboolean add_pad = FALSE;
const gchar *codec = NULL, *lang_code = NULL;
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_DVD_DEMUX_AUDIO_LAST, NULL);
if (type < GST_MPEG_DEMUX_AUDIO_LAST) {
/* FIXME: language codes on MPEG audio streams */
return parent_class->get_audio_stream (mpeg_demux, stream_nr, type, info);
}
if (type == GST_DVD_DEMUX_AUDIO_LPCM) {
sample_info = *((guint32 *) info);
}
str = mpeg_demux->audio_stream[stream_nr];
/* If the stream type is changing, recreate the pad */
if (str && str->type != type) {
gst_element_remove_pad (GST_ELEMENT (mpeg_demux), str->pad);
g_free (str);
str = mpeg_demux->audio_stream[stream_nr] = NULL;
}
if (str == NULL) {
gchar *name;
if (type != GST_DVD_DEMUX_AUDIO_LPCM) {
str = g_new0 (GstMPEGStream, 1);
} else {
lpcm_str = g_new0 (GstDVDLPCMStream, 1);
str = (GstMPEGStream *) lpcm_str;
}
name = g_strdup_printf ("audio_%02d", stream_nr);
DEMUX_CLASS (dvd_demux)->init_stream (mpeg_demux, type, str, stream_nr,
name, DEMUX_CLASS (dvd_demux)->audio_template);
/* update caps */
str->type = GST_MPEG_DEMUX_AUDIO_UNKNOWN;
g_free (name);
add_pad = TRUE;
} else {
/* Stream size may have changed, reset it. */
if (type != GST_DVD_DEMUX_AUDIO_LPCM) {
str = g_renew (GstMPEGStream, str, 1);
} else {
lpcm_str = g_renew (GstDVDLPCMStream, str, 1);
str = (GstMPEGStream *) lpcm_str;
}
}
mpeg_demux->audio_stream[stream_nr] = str;
if (type != str->type ||
(type == GST_DVD_DEMUX_AUDIO_LPCM &&
sample_info != lpcm_str->sample_info)) {
gint width, rate, channels, dynamic_range;
gboolean emphasis, mute;
/* We need to set new caps for this pad. */
switch (type) {
case GST_DVD_DEMUX_AUDIO_LPCM:
/* Dynamic range in the lower byte */
dynamic_range = sample_info & 0xff;
/* Determine the sample width. */
switch (sample_info & 0xC000) {
case 0x8000:
width = 24;
break;
case 0x4000:
width = 20;
break;
default:
width = 16;
break;
}
/* Determine the rate. */
if (sample_info & 0x1000) {
rate = 96000;
} else {
rate = 48000;
}
mute = ((sample_info & 0x400000) != 0);
emphasis = ((sample_info & 0x800000) != 0);
/* Determine the number of channels. */
channels = ((sample_info >> 8) & 0x7) + 1;
if (str->caps)
gst_caps_unref (str->caps);
str->caps = gst_caps_new_simple ("audio/x-lpcm",
"width", G_TYPE_INT, width,
"rate", G_TYPE_INT, rate,
"channels", G_TYPE_INT, channels,
"dynamic_range", G_TYPE_INT, dynamic_range,
"emphasis", G_TYPE_BOOLEAN, emphasis,
"mute", G_TYPE_BOOLEAN, mute, NULL);
lpcm_str->sample_info = sample_info;
lpcm_str->width = width;
lpcm_str->rate = rate;
lpcm_str->channels = channels;
lpcm_str->dynamic_range = dynamic_range;
lpcm_str->mute = mute;
lpcm_str->emphasis = emphasis;
codec = "LPCM audio";
break;
case GST_DVD_DEMUX_AUDIO_AC3:
if (str->caps)
gst_caps_unref (str->caps);
str->caps = gst_caps_new_simple ("audio/x-ac3", NULL);
codec = "AC-3 audio";
break;
case GST_DVD_DEMUX_AUDIO_DTS:
if (str->caps)
gst_caps_unref (str->caps);
str->caps = gst_caps_new_simple ("audio/x-dts", NULL);
codec = "DTS audio";
break;
default:
g_return_val_if_reached (NULL);
break;
}
if (!gst_pad_set_caps (str->pad, str->caps)) {
GST_ELEMENT_ERROR (GST_ELEMENT (mpeg_demux),
CORE, NEGOTIATION, (NULL),
("failed to set caps on pad %s:%s", GST_DEBUG_PAD_NAME (str->pad)));
gst_caps_unref (str->caps);
str->caps = NULL;
return str;
}
if (str->number == dvd_demux->cur_audio_nr) {
/* This is the current audio stream. Use the same caps. */
if (!gst_pad_set_caps (dvd_demux->cur_audio, str->caps)) {
GST_ELEMENT_ERROR (GST_ELEMENT (mpeg_demux),
CORE, NEGOTIATION, (NULL), ("failed to set caps on pad %s:%s",
GST_DEBUG_PAD_NAME (dvd_demux->cur_audio)));
}
}
if (add_pad) {
if (dvd_demux->langcodes) {
gchar *t;
t = g_strdup_printf ("audio-%d-language", stream_nr);
lang_code =
gst_structure_get_string (gst_event_get_structure
(dvd_demux->langcodes), t);
g_free (t);
}
GST_DEBUG_OBJECT (mpeg_demux, "adding pad %s with language = %s",
GST_PAD_NAME (str->pad), (lang_code) ? lang_code : "(unknown)");
gst_pad_set_active (str->pad, TRUE);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), str->pad);
if (codec || lang_code) {
GstTagList *list = gst_tag_list_new ();
if (codec) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_AUDIO_CODEC, codec, NULL);
}
if (lang_code) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_LANGUAGE_CODE, lang_code, NULL);
}
str->tags = gst_tag_list_copy (list);
gst_element_found_tags_for_pad (GST_ELEMENT (mpeg_demux),
str->pad, list);
}
}
str->type = type;
}
return str;
}
static GstMPEGStream *
gst_dvd_demux_get_subpicture_stream (GstMPEGDemux * mpeg_demux,
guint8 stream_nr, gint type, const gpointer info)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
GstMPEGStream *str;
gchar *name;
gboolean add_pad = FALSE;
const gchar *lang_code = NULL;
g_return_val_if_fail (stream_nr < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS, NULL);
g_return_val_if_fail (type > GST_DVD_DEMUX_SUBP_UNKNOWN &&
type < GST_DVD_DEMUX_SUBP_LAST, NULL);
str = dvd_demux->subpicture_stream[stream_nr];
if (str == NULL) {
str = g_new0 (GstMPEGStream, 1);
name = g_strdup_printf ("subpicture_%02d", stream_nr);
DEMUX_CLASS (dvd_demux)->init_stream (mpeg_demux, type, str, stream_nr,
name, CLASS (dvd_demux)->subpicture_template);
str->type = GST_DVD_DEMUX_SUBP_UNKNOWN;
g_free (name);
add_pad = TRUE;
} else {
/* This stream may have been created by a derived class, reset the
size. */
str = g_renew (GstMPEGStream, str, 1);
}
dvd_demux->subpicture_stream[stream_nr] = str;
if (str->type != GST_DVD_DEMUX_SUBP_DVD) {
/* We need to set new caps for this pad. */
if (str->caps)
gst_caps_unref (str->caps);
str->caps = gst_caps_new_simple ("video/x-dvd-subpicture", NULL);
if (!gst_pad_set_caps (str->pad, str->caps)) {
GST_ELEMENT_ERROR (GST_ELEMENT (mpeg_demux),
CORE, NEGOTIATION, (NULL),
("failed to set caps on pad %s:%s", GST_DEBUG_PAD_NAME (str->pad)));
gst_caps_unref (str->caps);
str->caps = NULL;
return str;
}
if (str->number == dvd_demux->cur_subpicture_nr) {
/* This is the current subpicture stream. Use the same caps. */
if (!gst_pad_set_caps (dvd_demux->cur_subpicture, str->caps)) {
GST_ELEMENT_ERROR (GST_ELEMENT (mpeg_demux),
CORE, NEGOTIATION, (NULL),
("failed to set caps on pad %s:%s", GST_DEBUG_PAD_NAME (str->pad)));
}
}
if (add_pad) {
if (dvd_demux->langcodes) {
gchar *t;
t = g_strdup_printf ("subtitle-%d-language", stream_nr);
lang_code =
gst_structure_get_string (gst_event_get_structure
(dvd_demux->langcodes), t);
g_free (t);
}
GST_DEBUG_OBJECT (mpeg_demux, "adding pad %s with language = %s",
GST_PAD_NAME (str->pad), (lang_code) ? lang_code : "(unknown)");
gst_pad_set_active (str->pad, TRUE);
gst_element_add_pad (GST_ELEMENT (mpeg_demux), str->pad);
if (lang_code) {
GstTagList *list = gst_tag_list_new ();
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_LANGUAGE_CODE, lang_code, NULL);
str->tags = gst_tag_list_copy (list);
gst_element_found_tags_for_pad (GST_ELEMENT (mpeg_demux),
str->pad, list);
}
}
str->type = GST_DVD_DEMUX_SUBP_DVD;
}
return str;
}
static gboolean
gst_dvd_demux_parse_packhead (GstMPEGParse * mpeg_parse, GstBuffer * buffer)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse);
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_parse);
gboolean pending_tags = mpeg_demux->pending_tags;
GST_MPEG_PARSE_CLASS (parent_class)->parse_packhead (mpeg_parse, buffer);
if (pending_tags) {
GstMPEGStream **streams;
guint i, num;
streams = dvd_demux->subpicture_stream;
num = GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS;
for (i = 0; i < num; ++i) {
if (streams[i] != NULL && streams[i]->tags != NULL)
gst_pad_push_event (streams[i]->pad,
gst_event_new_tag (gst_tag_list_copy (streams[i]->tags)));
}
}
return TRUE;
}
static GstFlowReturn
gst_dvd_demux_process_private (GstMPEGDemux * mpeg_demux,
GstBuffer * buffer,
guint stream_nr, GstClockTime timestamp, guint headerlen, guint datalen)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
GstFlowReturn ret = GST_FLOW_OK;
guint8 *basebuf;
guint8 ps_id_code;
GstMPEGStream *outstream = NULL;
guint first_access = 0;
gint align = 1, len, off;
basebuf = GST_BUFFER_DATA (buffer);
/* Determine the substream number. */
ps_id_code = basebuf[headerlen + 4];
/* In the following, the "first access" refers to the location in a
buffer the time stamp is associated to. DVDs include this
information explicitely. */
switch (stream_nr) {
case 0:
/* Private stream 1. */
if (ps_id_code >= 0x80 && ps_id_code <= 0x87) {
GST_LOG_OBJECT (dvd_demux,
"we have an audio (AC3) packet, track %d", ps_id_code - 0x80);
outstream = DEMUX_CLASS (dvd_demux)->get_audio_stream (mpeg_demux,
ps_id_code - 0x80, GST_DVD_DEMUX_AUDIO_AC3, NULL);
/* Determine the position of the "first access". This
should always be the beginning of an AC3 frame. */
first_access = (basebuf[headerlen + 6] << 8) | basebuf[headerlen + 7];
headerlen += 4;
datalen -= 4;
} else if (ps_id_code >= 0x88 && ps_id_code <= 0x8f) {
GST_LOG_OBJECT (dvd_demux,
"we have an audio (DTS) packet, track %d", ps_id_code - 0x88);
outstream = DEMUX_CLASS (dvd_demux)->get_audio_stream (mpeg_demux,
ps_id_code - 0x88, GST_DVD_DEMUX_AUDIO_DTS, NULL);
/* Determine the position of the "first access". This
should always be the beginning of a DTS frame. */
first_access = (basebuf[headerlen + 6] << 8) | basebuf[headerlen + 7];
headerlen += 4;
datalen -= 4;
} else if (ps_id_code >= 0xA0 && ps_id_code <= 0xA7) {
GstDVDLPCMStream *lpcm_str;
guint32 lpcm_sample_info;
GST_LOG_OBJECT (dvd_demux,
"we have an audio (LPCM) packet, track %d", ps_id_code - 0xA0);
/* Compose the sample info from the LPCM header, masking out the frame_num */
lpcm_sample_info =
basebuf[headerlen + 10] | (basebuf[headerlen +
9] << 8) | ((basebuf[headerlen + 8] & 0xc0) << 16);
outstream = DEMUX_CLASS (dvd_demux)->get_audio_stream (mpeg_demux,
ps_id_code - 0xA0, GST_DVD_DEMUX_AUDIO_LPCM, &lpcm_sample_info);
lpcm_str = (GstDVDLPCMStream *) outstream;
/* Determine the position of the "first access". */
first_access = (basebuf[headerlen + 6] << 8) | basebuf[headerlen + 7];
/* Get rid of the LPCM header. */
headerlen += 7;
datalen -= 7;
/* align by frame round up to nearest byte */
align = (lpcm_str->width * lpcm_str->channels + 7) / 8;
} else if (ps_id_code >= 0x20 && ps_id_code <= 0x3F) {
GST_LOG_OBJECT (dvd_demux,
"we have a subpicture packet, track %d", ps_id_code - 0x20);
outstream = CLASS (dvd_demux)->get_subpicture_stream (mpeg_demux,
ps_id_code - 0x20, GST_DVD_DEMUX_SUBP_DVD, NULL);
headerlen += 1;
datalen -= 1;
} else {
GST_WARNING_OBJECT (dvd_demux,
"unknown DVD (private 1) id 0x%02x", ps_id_code);
}
break;
case 1:
/* Private stream 2 */
switch (ps_id_code) {
case 0:
GST_LOG_OBJECT (dvd_demux, "we have a PCI nav packet");
outstream = DEMUX_CLASS (mpeg_demux)->get_private_stream (mpeg_demux,
1, GST_MPEG_DEMUX_PRIVATE_UNKNOWN, NULL);
break;
case 1:
GST_LOG_OBJECT (dvd_demux, "we have a DSI nav packet");
outstream = DEMUX_CLASS (mpeg_demux)->get_private_stream (mpeg_demux,
1, GST_MPEG_DEMUX_PRIVATE_UNKNOWN, NULL);
break;
default:
GST_WARNING_OBJECT (dvd_demux,
"unknown DVD (private 2) id 0x%02x", ps_id_code);
break;
}
break;
default:
g_return_val_if_reached (GST_FLOW_UNEXPECTED);
break;
}
if (outstream == NULL) {
return GST_FLOW_OK;
}
if (timestamp != GST_CLOCK_TIME_NONE && first_access > 1) {
/* We have a first access location. Since GStreamer doesn't have
a means to associate a timestamp to the middle of a buffer, we
send two separate buffers and put the timestamp in the second
one. */
off = headerlen + 4;
len = first_access - 1;
len -= len % align;
if (len > 0) {
ret = DEMUX_CLASS (dvd_demux)->send_subbuffer (mpeg_demux, outstream,
buffer, GST_CLOCK_TIME_NONE, off, len);
}
off += len;
len = datalen - len;
len -= len % align;
if (len > 0) {
ret = DEMUX_CLASS (dvd_demux)->send_subbuffer (mpeg_demux, outstream,
buffer, timestamp, off, len);
}
} else {
off = headerlen + 4;
len = datalen;
len -= len % align;
if (len > 0) {
ret = DEMUX_CLASS (dvd_demux)->send_subbuffer (mpeg_demux, outstream,
buffer, timestamp, off, len);
}
}
return ret;
}
/* random magic value */
#define MIN_BUFS_FOR_NO_MORE_PADS 100
static GstFlowReturn
gst_dvd_demux_combine_flows (GstMPEGDemux * mpegdemux, GstMPEGStream * stream,
GstFlowReturn flow)
{
GstDVDDemux *demux = (GstDVDDemux *) mpegdemux;
gint i;
/* store the value */
stream->last_flow = flow;
/* if it's success we can return the value right away */
if (flow == GST_FLOW_OK)
goto done;
/* any other error that is not-linked can be returned right
* away */
if (flow != GST_FLOW_NOT_LINKED) {
GST_DEBUG_OBJECT (demux, "flow %s on pad %" GST_PTR_FORMAT,
gst_flow_get_name (flow), stream->pad);
goto done;
}
/* let parent class check for anything non-not-linked for its streams */
flow =
GST_MPEG_DEMUX_CLASS (parent_class)->combine_flows (mpegdemux, stream,
flow);
if (flow != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
for (i = 0; i < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS; i++) {
if (demux->subpicture_stream[i] != NULL) {
flow = demux->subpicture_stream[i]->last_flow;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (flow != GST_FLOW_NOT_LINKED)
goto done;
if (demux->subpicture_stream[i]->buffers_sent < MIN_BUFS_FOR_NO_MORE_PADS) {
flow = GST_FLOW_OK;
goto done;
}
}
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
GST_DEBUG_OBJECT (demux, "all pads combined have not-linked flow");
done:
return flow;
}
static GstFlowReturn
gst_dvd_demux_send_subbuffer (GstMPEGDemux * mpeg_demux,
GstMPEGStream * outstream, GstBuffer * buffer,
GstClockTime timestamp, guint offset, guint size)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
GstFlowReturn ret;
GstPad *outpad;
gint cur_nr;
if (dvd_demux->segment_filter &&
GST_MPEG_DEMUX_STREAM_KIND (outstream->type) ==
GST_MPEG_DEMUX_STREAM_AUDIO) {
/* We are in segment_filter mode and have an audio buffer. */
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
/* This is the first valid audio buffer after the flush. */
dvd_demux->segment_filter = FALSE;
} else {
/* Discard the buffer. */
return GST_FLOW_OK;
}
}
/* You never know what happens to a buffer when you send it. Just
in case, we keep a reference to the buffer during the execution
of this function. */
gst_buffer_ref (buffer);
/* Send the buffer to the standard output pad. */
ret = parent_class->send_subbuffer (mpeg_demux, outstream, buffer,
timestamp, offset, size);
/* Determine the current output pad and stream number for the given
type of stream. */
switch (GST_MPEG_DEMUX_STREAM_KIND (outstream->type)) {
case GST_MPEG_DEMUX_STREAM_VIDEO:
outpad = dvd_demux->cur_video;
cur_nr = dvd_demux->cur_video_nr;
break;
case GST_MPEG_DEMUX_STREAM_AUDIO:
outpad = dvd_demux->cur_audio;
cur_nr = dvd_demux->cur_audio_nr;
break;
case GST_MPEG_DEMUX_STREAM_PRIVATE:
outpad = NULL;
cur_nr = 0;
break;
case GST_DVD_DEMUX_STREAM_SUBPICTURE:
outpad = dvd_demux->cur_subpicture;
cur_nr = dvd_demux->cur_subpicture_nr;
break;
default:
g_return_val_if_reached (GST_FLOW_UNEXPECTED);
break;
}
if (outpad != NULL && cur_nr == outstream->number && size > 0) {
GstBuffer *outbuf;
/* We have a packet of the current stream. Send it to the
corresponding pad as well. */
outbuf = gst_buffer_create_sub (buffer, offset, size);
g_return_val_if_fail (outbuf != NULL, GST_FLOW_UNEXPECTED);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + offset;
gst_buffer_set_caps (outbuf, outstream->caps);
ret = gst_pad_push (outpad, outbuf);
/* this was one of the current_foo pads, which is shadowing one of the
* foo_%02d pads, so since we keep track of the last flow value in the
* stream structure we need to combine the OK/NOT_LINKED flows here
* (because both pads share the same stream structure) */
if ((ret == GST_FLOW_NOT_LINKED && outstream->last_flow == GST_FLOW_OK) ||
(ret == GST_FLOW_OK && outstream->last_flow == GST_FLOW_NOT_LINKED)) {
outstream->last_flow = GST_FLOW_OK;
ret = GST_FLOW_OK;
}
}
gst_buffer_unref (buffer);
ret = DEMUX_CLASS (dvd_demux)->combine_flows (mpeg_demux, outstream, ret);
return ret;
}
static void
gst_dvd_demux_set_cur_audio (GstDVDDemux * dvd_demux, gint stream_nr)
{
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (dvd_demux);
GstMPEGStream *str;
GstCaps *caps;
g_return_if_fail (stream_nr >= -1 &&
stream_nr < GST_MPEG_DEMUX_NUM_AUDIO_STREAMS);
GST_DEBUG_OBJECT (dvd_demux, "changing current audio to %02d", stream_nr);
dvd_demux->cur_audio_nr = stream_nr;
if (stream_nr == -1) {
return;
}
str = mpeg_demux->audio_stream[stream_nr];
if (str != NULL) {
/* (Re)set the caps in the "current" pad. */
caps = GST_PAD_CAPS (str->pad);
if (caps != NULL) {
gst_pad_set_caps (dvd_demux->cur_audio, caps);
}
}
}
static void
gst_dvd_demux_set_cur_subpicture (GstDVDDemux * dvd_demux, gint stream_nr)
{
GstMPEGStream *str;
g_return_if_fail (stream_nr >= -1 &&
stream_nr < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS);
GST_DEBUG_OBJECT (dvd_demux, "changing current subpicture to %02d",
stream_nr);
dvd_demux->cur_subpicture_nr = stream_nr;
if (stream_nr == -1) {
return;
}
str = dvd_demux->subpicture_stream[stream_nr];
if (str != NULL) {
GstCaps *caps = NULL;
/* (Re)set the caps in the "current" pad. */
caps = GST_PAD_CAPS (str->pad);
gst_pad_set_caps (dvd_demux->cur_subpicture, caps);
}
}
static void
gst_dvd_demux_reset (GstDVDDemux * dvd_demux)
{
int i;
GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (dvd_demux);
GST_INFO ("Resetting the dvd demuxer");
for (i = 0; i < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS; i++) {
if (dvd_demux->subpicture_stream[i]) {
gst_pad_push_event (dvd_demux->subpicture_stream[i]->pad,
gst_event_new_eos ());
gst_element_remove_pad (GST_ELEMENT (dvd_demux),
dvd_demux->subpicture_stream[i]->pad);
if (dvd_demux->subpicture_stream[i]->caps)
gst_caps_unref (dvd_demux->subpicture_stream[i]->caps);
if (dvd_demux->subpicture_stream[i]->tags)
gst_tag_list_free (dvd_demux->subpicture_stream[i]->tags);
g_free (dvd_demux->subpicture_stream[i]);
dvd_demux->subpicture_stream[i] = NULL;
}
}
gst_pad_set_caps (dvd_demux->cur_video, NULL);
gst_pad_set_caps (dvd_demux->cur_audio, NULL);
gst_pad_set_caps (dvd_demux->cur_subpicture, NULL);
dvd_demux->cur_video_nr = 0;
dvd_demux->cur_audio_nr = 0;
dvd_demux->cur_subpicture_nr = 0;
dvd_demux->mpeg_version = 0;
/* Reset max_gap handling */
mpeg_demux->max_gap = MAX_GAP;
mpeg_demux->max_gap_tolerance = MAX_GAP_TOLERANCE;
}
static void
gst_dvd_demux_synchronise_pads (GstMPEGDemux * mpeg_demux,
GstClockTime threshold, GstClockTime new_ts)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
int i;
parent_class->synchronise_pads (mpeg_demux, threshold, new_ts);
for (i = 0; i < GST_DVD_DEMUX_NUM_SUBPICTURE_STREAMS; i++) {
if (dvd_demux->subpicture_stream[i]) {
GST_LOG_OBJECT (mpeg_demux, "stream: %d, current: %" GST_TIME_FORMAT
", threshold %" GST_TIME_FORMAT, i,
GST_TIME_ARGS (dvd_demux->subpicture_stream[i]->cur_ts),
GST_TIME_ARGS (threshold));
}
if (dvd_demux->subpicture_stream[i]
&& (dvd_demux->subpicture_stream[i]->cur_ts < threshold)) {
DEMUX_CLASS (mpeg_demux)->sync_stream_to_time (mpeg_demux,
dvd_demux->subpicture_stream[i], new_ts);
dvd_demux->subpicture_stream[i]->cur_ts = new_ts;
}
}
}
static void
gst_dvd_demux_sync_stream_to_time (GstMPEGDemux * mpeg_demux,
GstMPEGStream * stream, GstClockTime last_ts)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (mpeg_demux);
GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (mpeg_demux);
GstPad *outpad;
gint cur_nr;
parent_class->sync_stream_to_time (mpeg_demux, stream, last_ts);
switch (GST_MPEG_DEMUX_STREAM_KIND (stream->type)) {
case GST_MPEG_DEMUX_STREAM_VIDEO:
outpad = dvd_demux->cur_video;
cur_nr = dvd_demux->cur_video_nr;
break;
case GST_MPEG_DEMUX_STREAM_AUDIO:
outpad = dvd_demux->cur_audio;
cur_nr = dvd_demux->cur_audio_nr;
break;
case GST_DVD_DEMUX_STREAM_SUBPICTURE:
outpad = dvd_demux->cur_subpicture;
cur_nr = dvd_demux->cur_subpicture_nr;
break;
default:
return;
}
if (outpad && (cur_nr == stream->number)) {
guint64 update_time;
update_time =
MIN ((guint64) last_ts, (guint64) mpeg_parse->current_segment.stop);
gst_pad_push_event (outpad, gst_event_new_new_segment (TRUE,
mpeg_parse->current_segment.rate, GST_FORMAT_TIME,
update_time, mpeg_parse->current_segment.stop, update_time));
}
}
static GstStateChangeReturn
gst_dvd_demux_change_state (GstElement * element, GstStateChange transition)
{
GstDVDDemux *dvd_demux = GST_DVD_DEMUX (element);
GstStateChangeReturn ret;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_dvd_demux_reset (dvd_demux);
if (dvd_demux->langcodes) {
gst_event_unref (dvd_demux->langcodes);
dvd_demux->langcodes = NULL;
}
break;
default:
break;
}
return ret;
}
gboolean
gst_dvd_demux_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "dvddemux",
GST_RANK_SECONDARY + 1, GST_TYPE_DVD_DEMUX);
}
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