mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-20 07:16:55 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/resindvd/gstmpegdemux.c
Jan Schmidt 4d5a48db97 resindvd: Create all the audio streams of all formats 
Enable creation of the demuxer pads for all audio streams, even types we
don't yet support. This means that unsupported types (LPCM, DTS) are output,
but not linked to anything yet. If only unsupported streams are available,
the user hears silence instead of having the pipeline not pre-roll correctly.

This is a prerequisite for hooking up the automatic decoder switching.
2009-05-27 22:57:03 +01:00

2094 lines
62 KiB
C
Raw Blame History

/*
* 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.
*
* The Original Code is Fluendo MPEG Demuxer plugin.
*
* The Initial Developer of the Original Code is Fluendo, S.L.
* Portions created by Fluendo, S.L. are Copyright (C) 2005
* Fluendo, S.L. All Rights Reserved.
*
* Contributor(s): Wim Taymans <wim@fluendo.com>
* Jan Schmidt <thaytan@noraisin.net>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstmpegdefs.h"
#include "gstmpegdemux.h"
#define SEGMENT_THRESHOLD (300*GST_MSECOND)
#define VIDEO_SEGMENT_THRESHOLD (500*GST_MSECOND)
/* The SCR_MUNGE value is used to offset the scr_adjust value, to avoid
* ever generating a negative timestamp */
#define SCR_MUNGE (10 * GST_SECOND)
/* We clamp scr delta with 0 so negative bytes won't be possible */
#define GSTTIME_TO_BYTES(time) \
((time != -1) ? gst_util_uint64_scale (MAX(0,(gint64) (GSTTIME_TO_MPEGTIME(time) - demux->first_scr)), demux->scr_rate_n, demux->scr_rate_d) : -1)
#define BYTES_TO_GSTTIME(bytes) ((bytes != -1) ? MPEGTIME_TO_GSTTIME(gst_util_uint64_scale (bytes, demux->scr_rate_d, demux->scr_rate_n)) : -1)
#define ADAPTER_OFFSET_FLUSH(_bytes_) demux->adapter_offset += (_bytes_)
GST_DEBUG_CATEGORY_STATIC (gstflupsdemux_debug);
#define GST_CAT_DEFAULT (gstflupsdemux_debug)
GST_DEBUG_CATEGORY_EXTERN (gstflupesfilter_debug);
/* elementfactory information */
static GstElementDetails flups_demux_details = {
"MPEG Program Demuxer",
"Codec/Demuxer",
"Demultiplexes MPEG Program Streams",
"Wim Taymans <wim@fluendo.com>"
};
/* MPEG2Demux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
/* FILL ME */
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-resin-dvd")
);
static GstStaticPadTemplate video_template =
GST_STATIC_PAD_TEMPLATE ("video_%02x",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2, 4 }, " "systemstream = (boolean) FALSE;"
"video/x-h264")
);
static GstStaticPadTemplate audio_template =
GST_STATIC_PAD_TEMPLATE ("audio_%02x",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("audio/mpeg, "
"mpegversion = (int) 1;"
"audio/x-private1-lpcm; "
"audio/x-private1-ac3;" "audio/x-private1-dts;" "audio/ac3")
);
static GstStaticPadTemplate subpicture_template =
GST_STATIC_PAD_TEMPLATE ("subpicture_%02x",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/x-dvd-subpicture")
);
static GstStaticPadTemplate private_template =
GST_STATIC_PAD_TEMPLATE ("private_%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static void gst_flups_demux_base_init (GstFluPSDemuxClass * klass);
static void gst_flups_demux_class_init (GstFluPSDemuxClass * klass);
static void gst_flups_demux_init (GstFluPSDemux * demux);
static void gst_flups_demux_finalize (GstFluPSDemux * demux);
static void gst_flups_demux_reset (GstFluPSDemux * demux);
static gboolean gst_flups_demux_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_flups_demux_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_flups_demux_src_query (GstPad * pad, GstQuery * query);
static GstFlowReturn gst_flups_demux_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn gst_flups_demux_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/*static guint gst_flups_demux_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_flups_demux_get_type (void)
{
static GType flups_demux_type = 0;
if (!flups_demux_type) {
static const GTypeInfo flups_demux_info = {
sizeof (GstFluPSDemuxClass),
(GBaseInitFunc) gst_flups_demux_base_init,
NULL,
(GClassInitFunc) gst_flups_demux_class_init,
NULL,
NULL,
sizeof (GstFluPSDemux),
0,
(GInstanceInitFunc) gst_flups_demux_init,
};
flups_demux_type =
g_type_register_static (GST_TYPE_ELEMENT, "RsnDVDDemux",
&flups_demux_info, 0);
GST_DEBUG_CATEGORY_INIT (gstflupsdemux_debug, "rsndvddemux", 0,
"MPEG program stream demultiplexer element");
}
return flups_demux_type;
}
static void
gst_flups_demux_base_init (GstFluPSDemuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
klass->sink_template = 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->subpicture_template =
gst_static_pad_template_get (&subpicture_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_add_pad_template (element_class,
klass->subpicture_template);
gst_element_class_add_pad_template (element_class, klass->sink_template);
gst_element_class_set_details (element_class, &flups_demux_details);
}
static void
gst_flups_demux_class_init (GstFluPSDemuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = (GObjectFinalizeFunc) gst_flups_demux_finalize;
gstelement_class->change_state = gst_flups_demux_change_state;
}
static void
gst_flups_demux_init (GstFluPSDemux * demux)
{
GstFluPSDemuxClass *klass = GST_FLUPS_DEMUX_GET_CLASS (demux);
demux->sinkpad = gst_pad_new_from_template (klass->sink_template, "sink");
gst_pad_set_event_function (demux->sinkpad, gst_flups_demux_sink_event);
gst_pad_set_chain_function (demux->sinkpad, gst_flups_demux_chain);
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
demux->streams =
g_malloc0 (sizeof (GstFluPSStream *) * (GST_FLUPS_DEMUX_MAX_STREAMS));
demux->scr_adjust = GSTTIME_TO_MPEGTIME (SCR_MUNGE);
}
static void
gst_flups_demux_finalize (GstFluPSDemux * demux)
{
gst_flups_demux_reset (demux);
g_free (demux->streams);
G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (demux));
}
static void
gst_flups_demux_reset (GstFluPSDemux * demux)
{
/* Clean up the streams and pads we allocated */
gint i;
GstEvent **p_ev;
for (i = 0; i < GST_FLUPS_DEMUX_MAX_STREAMS; i++) {
GstFluPSStream *stream = demux->streams[i];
if (stream != NULL) {
if (stream->pad)
gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
g_free (stream);
demux->streams[i] = NULL;
}
}
p_ev = &demux->lang_codes;
gst_event_replace (p_ev, NULL);
demux->scr_adjust = GSTTIME_TO_MPEGTIME (SCR_MUNGE);
}
static GstFluPSStream *
gst_flups_demux_create_stream (GstFluPSDemux * demux, gint id, gint stream_type)
{
GstFluPSStream *stream;
GstPadTemplate *template;
gchar *name;
GstFluPSDemuxClass *klass = GST_FLUPS_DEMUX_GET_CLASS (demux);
GstCaps *caps;
GstClockTime threshold = SEGMENT_THRESHOLD;
name = NULL;
template = NULL;
caps = NULL;
GST_DEBUG_OBJECT (demux, "create stream id 0x%02x, type 0x%02x", id,
stream_type);
switch (stream_type) {
case ST_VIDEO_MPEG1:
case ST_VIDEO_MPEG2:
case ST_VIDEO_MPEG4:
case ST_GST_VIDEO_MPEG1_OR_2:
{
gint mpeg_version = 1;
if (stream_type == ST_VIDEO_MPEG2 ||
(stream_type == ST_GST_VIDEO_MPEG1_OR_2 && demux->is_mpeg2_pack)) {
mpeg_version = 2;
}
if (stream_type == ST_VIDEO_MPEG4) {
mpeg_version = 4;
}
template = klass->video_template;
name = g_strdup_printf ("video_%02x", id);
caps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, mpeg_version,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
threshold = VIDEO_SEGMENT_THRESHOLD;
break;
}
case ST_AUDIO_MPEG1:
case ST_AUDIO_MPEG2:
template = klass->audio_template;
name = g_strdup_printf ("audio_%02x", id);
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1, NULL);
break;
case ST_PRIVATE_SECTIONS:
case ST_PRIVATE_DATA:
case ST_MHEG:
case ST_DSMCC:
case ST_AUDIO_AAC:
break;
case ST_VIDEO_H264:
template = klass->video_template;
name = g_strdup_printf ("video_%02x", id);
caps = gst_caps_new_simple ("video/x-h264", NULL);
threshold = VIDEO_SEGMENT_THRESHOLD;
break;
case ST_PS_AUDIO_AC3:
template = klass->audio_template;
name = g_strdup_printf ("audio_%02x", id);
caps = gst_caps_new_simple ("audio/x-private1-ac3", NULL);
break;
case ST_PS_AUDIO_DTS:
template = klass->audio_template;
name = g_strdup_printf ("audio_%02x", id);
caps = gst_caps_new_simple ("audio/x-private1-dts", NULL);
break;
case ST_PS_AUDIO_LPCM:
template = klass->audio_template;
name = g_strdup_printf ("audio_%02x", id);
caps = gst_caps_new_simple ("audio/x-private1-lpcm", NULL);
break;
case ST_PS_DVD_SUBPICTURE:
template = klass->subpicture_template;
name = g_strdup_printf ("subpicture_%02x", id);
caps = gst_caps_new_simple ("video/x-dvd-subpicture", NULL);
break;
case ST_GST_AUDIO_RAWA52:
template = klass->audio_template;
name = g_strdup_printf ("audio_%02x", id);
caps = gst_caps_new_simple ("audio/ac3", NULL);
break;
default:
break;
}
if (name == NULL || template == NULL || caps == NULL)
return NULL;
stream = g_new0 (GstFluPSStream, 1);
stream->id = id;
stream->discont = TRUE;
stream->notlinked = FALSE;
stream->type = stream_type;
stream->pad = gst_pad_new_from_template (template, name);
stream->segment_thresh = threshold;
gst_pad_set_event_function (stream->pad, gst_flups_demux_src_event);
gst_pad_set_query_function (stream->pad, gst_flups_demux_src_query);
gst_pad_use_fixed_caps (stream->pad);
gst_pad_set_caps (stream->pad, caps);
gst_caps_unref (caps);
GST_DEBUG_OBJECT (demux, "create pad %s, caps %" GST_PTR_FORMAT, name, caps);
g_free (name);
return stream;
}
static GstFluPSStream *
gst_flups_demux_get_stream (GstFluPSDemux * demux, gint id, gint type)
{
GstFluPSStream *stream = demux->streams[id];
if (stream == NULL && !demux->disable_stream_creation) {
if (!(stream = gst_flups_demux_create_stream (demux, id, type)))
goto unknown_stream;
GST_DEBUG_OBJECT (demux, "adding pad for stream id 0x%02x type 0x%02x", id,
type);
gst_pad_set_active (stream->pad, TRUE);
gst_element_add_pad (GST_ELEMENT (demux), stream->pad);
demux->streams[id] = stream;
}
return stream;
/* ERROR */
unknown_stream:
{
GST_DEBUG_OBJECT (demux, "unknown stream id 0x%02x type 0x%02x", id, type);
return NULL;
}
}
static GstFlowReturn
gst_flups_demux_send_data (GstFluPSDemux * demux, GstFluPSStream * stream,
GstBuffer * buf)
{
GstFlowReturn result;
guint64 timestamp;
guint size;
if (stream == NULL)
goto no_stream;
/* timestamps */
if (demux->next_pts != G_MAXUINT64)
timestamp = MPEGTIME_TO_GSTTIME (demux->next_pts);
else
timestamp = GST_CLOCK_TIME_NONE;
if (demux->current_scr != G_MAXUINT64) {
GstClockTime cur_scr_time = MPEGTIME_TO_GSTTIME (demux->current_scr);
if (stream->last_ts == GST_CLOCK_TIME_NONE ||
stream->last_ts < cur_scr_time) {
#if 0
g_print ("last_ts update on pad %s to time %" GST_TIME_FORMAT "\n",
GST_PAD_NAME (stream->pad), GST_TIME_ARGS (cur_scr_time));
#endif
stream->last_ts = cur_scr_time;
}
}
/* OK, sent new segment now prepare the buffer for sending */
/* caps */
gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad));
GST_BUFFER_TIMESTAMP (buf) = timestamp;
/* Set the buffer discont flag, and clear discont state on the stream */
if (stream->discont) {
GST_DEBUG_OBJECT (demux, "discont buffer to pad %" GST_PTR_FORMAT
" with TS %" GST_TIME_FORMAT, stream->pad, GST_TIME_ARGS (timestamp));
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
size = GST_BUFFER_SIZE (buf);
demux->next_pts = G_MAXUINT64;
demux->next_dts = G_MAXUINT64;
result = gst_pad_push (stream->pad, buf);
GST_DEBUG_OBJECT (demux, "pushed stream id 0x%02x type 0x%02x, time: %"
GST_TIME_FORMAT ", size %d. result: %s",
stream->id, stream->type, GST_TIME_ARGS (timestamp),
size, gst_flow_get_name (result));
return result;
/* ERROR */
no_stream:
{
GST_DEBUG_OBJECT (demux, "no stream given");
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
}
static void
gst_flups_demux_mark_discont (GstFluPSDemux * demux)
{
gint id;
/* mark discont on all streams */
for (id = 0; id < GST_FLUPS_DEMUX_MAX_STREAMS; id++) {
GstFluPSStream *stream = demux->streams[id];
if (stream) {
stream->discont = TRUE;
GST_DEBUG_OBJECT (demux, "marked stream as discont %d", stream->discont);
}
}
}
static void
gst_flups_demux_clear_times (GstFluPSDemux * demux)
{
gint id;
/* Clear the last ts for all streams */
for (id = 0; id < GST_FLUPS_DEMUX_MAX_STREAMS; id++) {
GstFluPSStream *stream = demux->streams[id];
if (stream) {
stream->last_seg_start = stream->last_ts = GST_CLOCK_TIME_NONE;
}
}
}
static void
gst_flups_demux_send_segment_updates (GstFluPSDemux * demux,
GstClockTime new_time)
{
/* Advance all lagging streams by sending a segment update */
gint id;
GstEvent *event = NULL;
if (new_time > demux->src_segment.stop)
return;
for (id = 0; id < GST_FLUPS_DEMUX_MAX_STREAMS; id++) {
GstFluPSStream *stream = demux->streams[id];
if (stream) {
if (stream->last_ts == GST_CLOCK_TIME_NONE ||
stream->last_ts < demux->src_segment.start)
stream->last_ts = demux->src_segment.start;
if (stream->last_ts + stream->segment_thresh < new_time) {
#if 0
g_print ("Segment update to pad %s time %" GST_TIME_FORMAT " stop now %"
GST_TIME_FORMAT " last_stop %" GST_TIME_FORMAT "\n",
GST_PAD_NAME (stream->pad), GST_TIME_ARGS (new_time),
GST_TIME_ARGS (demux->src_segment.stop),
GST_TIME_ARGS (demux->src_segment.last_stop));
#endif
GST_DEBUG_OBJECT (demux,
"Segment update to pad %s time %" GST_TIME_FORMAT,
GST_PAD_NAME (stream->pad), GST_TIME_ARGS (new_time));
if (event == NULL) {
event = gst_event_new_new_segment_full (TRUE,
demux->src_segment.rate, demux->src_segment.applied_rate,
GST_FORMAT_TIME, new_time,
demux->src_segment.stop,
demux->src_segment.time + (new_time - demux->src_segment.start));
}
gst_event_ref (event);
gst_pad_push_event (stream->pad, event);
stream->last_seg_start = stream->last_ts = new_time;
}
}
}
if (event)
gst_event_unref (event);
}
static void
gst_flups_demux_send_segment_close (GstFluPSDemux * demux)
{
gint id;
GstEvent *event = NULL;
GstClockTime stop = demux->src_segment.stop;
if (demux->src_segment.last_stop != -1 && demux->src_segment.last_stop > stop)
stop = demux->src_segment.last_stop;
for (id = 0; id < GST_FLUPS_DEMUX_MAX_STREAMS; id++) {
GstFluPSStream *stream = demux->streams[id];
if (stream) {
GstClockTime start = demux->src_segment.start;
if (stream->last_seg_start != GST_CLOCK_TIME_NONE &&
stream->last_seg_start > start)
start = stream->last_seg_start;
#if 0
g_print ("Segment close to pad %s start %" GST_TIME_FORMAT
" stop %" GST_TIME_FORMAT "\n",
GST_PAD_NAME (stream->pad), GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
#endif
if (start > stop) {
g_print ("Problem on pad %s with start %" GST_TIME_FORMAT " > stop %"
GST_TIME_FORMAT "\n",
gst_object_get_name (GST_OBJECT (stream->pad)),
GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
}
event = gst_event_new_new_segment_full (TRUE,
demux->src_segment.rate, demux->src_segment.applied_rate,
GST_FORMAT_TIME, start,
stop, demux->src_segment.time + (start - demux->src_segment.start));
if (event)
gst_pad_push_event (stream->pad, event);
}
}
}
static gboolean
gst_flups_demux_send_event (GstFluPSDemux * demux, GstEvent * event)
{
gint id;
gboolean ret = FALSE;
for (id = 0; id < GST_FLUPS_DEMUX_MAX_STREAMS; id++) {
GstFluPSStream *stream = demux->streams[id];
if (stream) {
(void) gst_event_ref (event);
if (!gst_pad_push_event (stream->pad, event)) {
GST_DEBUG_OBJECT (stream, "event %s was not handled correctly by pad %"
GST_PTR_FORMAT, GST_EVENT_TYPE_NAME (event), stream->pad);
} else {
/* If at least one push returns TRUE, then we return TRUE. */
GST_DEBUG_OBJECT (stream, "event %s was handled correctly by pad %"
GST_PTR_FORMAT, GST_EVENT_TYPE_NAME (event), stream->pad);
ret = TRUE;
}
}
}
gst_event_unref (event);
return ret;
}
static gboolean
gst_flups_demux_handle_dvd_event (GstFluPSDemux * demux, GstEvent * event)
{
const GstStructure *structure = gst_event_get_structure (event);
const char *type = gst_structure_get_string (structure, "event");
gint i;
gchar cur_stream_name[32];
GstFluPSStream *temp;
gboolean ret = TRUE;
if (strcmp (type, "dvd-lang-codes") == 0) {
GstEvent **p_ev;
/* Store the language codes event on the element, then iterate over the
* streams it specifies and retrieve them. The stream creation code then
* creates the pad appropriately and sends tag events as needed */
p_ev = &demux->lang_codes;
gst_event_replace (p_ev, event);
GST_DEBUG_OBJECT (demux, "Handling language codes event");
demux->disable_stream_creation = FALSE;
/* Create a video pad to ensure it exists before emitting no more pads */
temp = gst_flups_demux_get_stream (demux, 0xe0, ST_VIDEO_MPEG2);
/* Send a video format event downstream */
{
gboolean is_widescreen, is_pal;
if (gst_structure_get_boolean (structure,
"video-widescreen", &is_widescreen) &&
gst_structure_get_boolean (structure, "video-pal-format", &is_pal)) {
GstEvent *v_format;
GstStructure *v_struct;
v_struct = gst_structure_new ("application/x-gst-dvd",
"event", G_TYPE_STRING, "dvd-video-format",
"video-widescreen", G_TYPE_BOOLEAN, is_widescreen,
"video-pal-format", G_TYPE_BOOLEAN, is_pal, NULL);
v_format = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, v_struct);
gst_pad_push_event (temp->pad, v_format);
}
}
/* Read out the languages for audio streams and request each one that
* is present */
for (i = 0; i < MAX_DVD_AUDIO_STREAMS; i++) {
gint stream_format;
gint stream_id;
g_snprintf (cur_stream_name, 32, "audio-%d-format", i);
if (!gst_structure_get_int (structure, cur_stream_name, &stream_format))
continue;
g_snprintf (cur_stream_name, 32, "audio-%d-stream", i);
if (!gst_structure_get_int (structure, cur_stream_name, &stream_id))
continue;
if (stream_id < 0 || stream_id >= MAX_DVD_AUDIO_STREAMS)
continue;
demux->audio_stream_types[i] = stream_format;
switch (stream_format) {
case 0x0:
/* AC3 */
stream_id += 0x80;
GST_DEBUG_OBJECT (demux,
"Audio stream %d format %d ID 0x%02x - AC3", i,
stream_format, stream_id);
temp = gst_flups_demux_get_stream (demux, stream_id, ST_PS_AUDIO_AC3);
break;
case 0x2:
case 0x3:
/* MPEG audio without and with extension stream are
* treated the same */
stream_id += 0xC0;
GST_DEBUG_OBJECT (demux,
"Audio stream %d format %d ID 0x%02x - MPEG audio", i,
stream_format, stream_id);
temp = gst_flups_demux_get_stream (demux, stream_id, ST_AUDIO_MPEG1);
break;
case 0x4:
/* LPCM */
stream_id += 0xA0;
GST_DEBUG_OBJECT (demux,
"Audio stream %d format %d ID 0x%02x - DVD LPCM", i,
stream_format, stream_id);
temp =
gst_flups_demux_get_stream (demux, stream_id, ST_PS_AUDIO_LPCM);
break;
case 0x6:
/* DTS */
stream_id += 0x88;
GST_DEBUG_OBJECT (demux,
"Audio stream %d format %d ID 0x%02x - DTS", i,
stream_format, stream_id);
temp = gst_flups_demux_get_stream (demux, stream_id, ST_PS_AUDIO_DTS);
break;
case 0x7:
/* FIXME: What range is SDDS? */
break;
default:
GST_WARNING_OBJECT (demux,
"Unknown audio stream format in language code event: %d",
stream_format);
break;
}
}
/* And subtitle streams */
for (i = 0; i < MAX_DVD_SUBPICTURE_STREAMS; i++) {
gint stream_format;
gint stream_id;
g_snprintf (cur_stream_name, 32, "subpicture-%d-format", i);
if (!gst_structure_get_int (structure, cur_stream_name, &stream_format))
continue;
g_snprintf (cur_stream_name, 32, "subpicture-%d-stream", i);
if (!gst_structure_get_int (structure, cur_stream_name, &stream_id))
continue;
if (stream_id < 0 || stream_id >= MAX_DVD_SUBPICTURE_STREAMS)
continue;
GST_DEBUG_OBJECT (demux, "Subpicture stream %d ID 0x%02x", i, 0x20 + i);
/* Retrieve the subpicture stream to force pad creation */
temp = gst_flups_demux_get_stream (demux, 0x20 + stream_id,
ST_PS_DVD_SUBPICTURE);
}
demux->disable_stream_creation = TRUE;
GST_DEBUG_OBJECT (demux, "Created all pads from Language Codes event, "
"signalling no-more-pads");
gst_element_no_more_pads (GST_ELEMENT (demux));
demux->need_no_more_pads = FALSE;
gst_event_unref (event);
} else if (strcmp (type, "dvd-set-subpicture-track") == 0) {
gint stream_id;
gboolean forced_only;
gst_structure_get_boolean (structure, "forced-only", &forced_only);
if (gst_structure_get_int (structure, "physical-id", &stream_id)) {
temp = demux->streams[0x20 + stream_id];
if (temp != NULL && temp->pad != NULL) {
/* Send event to the selector to activate the desired pad */
GstStructure *s = gst_structure_new ("application/x-gst-dvd",
"event", G_TYPE_STRING, "select-pad", NULL);
GstEvent *sel_event =
gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);
temp->notlinked = FALSE;
gst_pad_push_event (temp->pad, sel_event);
gst_event_ref (event);
ret = gst_pad_push_event (temp->pad, event);
GST_INFO_OBJECT (demux,
"Subpicture physical ID change to %d, forced %d", stream_id,
forced_only);
}
}
gst_event_unref (event);
} else if (strcmp (type, "dvd-set-audio-track") == 0) {
gint stream_id;
if (gst_structure_get_int (structure, "physical-id", &stream_id)) {
gint aud_type;
stream_id %= MAX_DVD_AUDIO_STREAMS;
aud_type = demux->audio_stream_types[stream_id];
switch (aud_type) {
case 0x0:
/* AC3 */
stream_id += 0x80;
temp = demux->streams[stream_id];
break;
case 0x2:
case 0x3:
/* MPEG audio without and with extension stream are
* treated the same */
stream_id += 0xC0;
temp = demux->streams[stream_id];
break;
case 0x4:
/* LPCM */
stream_id += 0xA0;
temp = demux->streams[stream_id];
break;
case 0x6:
/* DTS */
stream_id += 0x88;
temp = demux->streams[stream_id];
break;
case 0x7:
/* FIXME: What range is SDDS? */
temp = NULL;
break;
default:
temp = NULL;
break;
}
GST_INFO_OBJECT (demux, "Have DVD audio stream select event: "
"stream 0x%02x", stream_id);
if (temp != NULL && temp->pad != NULL) {
/* Send event to the selector to activate the desired pad */
GstStructure *s = gst_structure_new ("application/x-gst-dvd",
"event", G_TYPE_STRING, "select-pad", NULL);
GstEvent *sel_event =
gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);
gst_pad_push_event (temp->pad, sel_event);
gst_event_ref (event);
ret = gst_pad_push_event (temp->pad, event);
}
}
ret = gst_flups_demux_send_event (demux, event);
} else {
ret = gst_flups_demux_send_event (demux, event);
}
return ret;
}
static gboolean
gst_flups_demux_sink_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstFluPSDemux *demux;
demux = GST_FLUPS_DEMUX (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
gst_flups_demux_send_event (demux, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_flups_demux_send_event (demux, event);
gst_segment_init (&demux->sink_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&demux->src_segment, GST_FORMAT_TIME);
gst_adapter_clear (demux->adapter);
gst_adapter_clear (demux->rev_adapter);
demux->adapter_offset = G_MAXUINT64;
gst_pes_filter_drain (&demux->filter);
demux->current_scr = G_MAXUINT64;
demux->bytes_since_scr = 0;
demux->scr_adjust = GSTTIME_TO_MPEGTIME (SCR_MUNGE);
gst_flups_demux_clear_times (demux);
break;
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
gdouble rate;
GstFormat format;
gint64 start, stop, time;
gint64 accum, dur;
gdouble arate;
GstClockTimeDiff adjust;
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
if (format != GST_FORMAT_TIME)
return FALSE;
dur = stop - start;
demux->first_scr = GSTTIME_TO_MPEGTIME (start);
demux->current_scr = demux->first_scr + demux->scr_adjust;
demux->base_time = time;
demux->bytes_since_scr = 0;
gst_segment_set_newsegment_full (&demux->sink_segment, update, rate,
arate, format, start, stop, time);
GST_DEBUG_OBJECT (demux,
"demux: got segment update %d start %" G_GINT64_FORMAT " stop %"
G_GINT64_FORMAT " time %" G_GINT64_FORMAT, update, start, stop, time);
accum = demux->sink_segment.accum;
start = demux->sink_segment.start;
stop = demux->sink_segment.stop;
adjust = accum - start + SCR_MUNGE;
start = accum + SCR_MUNGE;
if (adjust >= 0)
demux->scr_adjust = GSTTIME_TO_MPEGTIME (adjust);
else
demux->scr_adjust = -GSTTIME_TO_MPEGTIME (-adjust);
if (stop != -1) {
stop = start + dur;
if (demux->src_segment.last_stop != -1
&& demux->src_segment.last_stop > stop)
stop = demux->src_segment.last_stop;
}
GST_DEBUG_OBJECT (demux,
"sending new segment: update %d rate %g format %d, start: %"
G_GINT64_FORMAT ", stop: %" G_GINT64_FORMAT ", time: %"
G_GINT64_FORMAT " scr_adjust: %" G_GINT64_FORMAT "(%" GST_TIME_FORMAT
")", update, rate, format, start, stop, time, demux->scr_adjust,
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (demux->scr_adjust)));
gst_segment_set_newsegment_full (&demux->src_segment, update,
rate, arate, format, start, stop, time);
gst_event_unref (event);
if (update) {
/* Segment closing, send it as per-pad updates to manage the accum
* properly */
gst_flups_demux_send_segment_close (demux);
} else {
event = gst_event_new_new_segment_full (update,
rate, arate, GST_FORMAT_TIME, start, stop, time);
gst_flups_demux_send_event (demux, event);
}
break;
}
case GST_EVENT_EOS:
GST_INFO_OBJECT (demux, "Received EOS");
if (!gst_flups_demux_send_event (demux, event)) {
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
("Internal data stream error."), ("Can't push EOS downstream"));
}
break;
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
{
const GstStructure *structure = gst_event_get_structure (event);
if (structure != NULL
&& gst_structure_has_name (structure, "application/x-gst-dvd")) {
res = gst_flups_demux_handle_dvd_event (demux, event);
} else {
gst_flups_demux_send_event (demux, event);
}
break;
}
default:
gst_flups_demux_send_event (demux, event);
break;
}
gst_object_unref (demux);
return res;
}
static gboolean
gst_flups_demux_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = FALSE;
GstFluPSDemux *demux;
demux = GST_FLUPS_DEMUX (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gint64 bstart, bstop;
GstEvent *bevent;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
GST_DEBUG_OBJECT (demux, "seek event, rate: %f start: %" GST_TIME_FORMAT
" stop: %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
if (format == GST_FORMAT_BYTES) {
GST_DEBUG_OBJECT (demux, "seek not supported on format %d", format);
goto not_supported;
}
GST_DEBUG_OBJECT (demux, "seek - trying directly upstream first");
/* first try original format seek */
(void) gst_event_ref (event);
if ((res = gst_pad_push_event (demux->sinkpad, event)))
goto done;
if (format != GST_FORMAT_TIME) {
/* From here down, we only support time based seeks */
GST_DEBUG_OBJECT (demux, "seek not supported on format %d", format);
goto not_supported;
}
/* We need to convert to byte based seek and we need a scr_rate for that. */
if (demux->scr_rate_n == G_MAXUINT64 || demux->scr_rate_d == G_MAXUINT64) {
GST_DEBUG_OBJECT (demux, "seek not possible, no scr_rate");
goto not_supported;
}
GST_DEBUG_OBJECT (demux, "try with scr_rate interpolation");
bstart = GSTTIME_TO_BYTES (start);
bstop = GSTTIME_TO_BYTES (stop);
GST_DEBUG_OBJECT (demux, "in bytes bstart %" G_GINT64_FORMAT " bstop %"
G_GINT64_FORMAT, bstart, bstop);
bevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, start_type,
bstart, stop_type, bstop);
res = gst_pad_push_event (demux->sinkpad, bevent);
done:
gst_event_unref (event);
break;
}
default:
res = gst_pad_push_event (demux->sinkpad, event);
break;
}
gst_object_unref (demux);
return res;
not_supported:
{
gst_object_unref (demux);
gst_event_unref (event);
return FALSE;
}
}
static gboolean
gst_flups_demux_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = FALSE;
GstFluPSDemux *demux;
demux = GST_FLUPS_DEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (demux, "Have query of type %d on pad %" GST_PTR_FORMAT,
GST_QUERY_TYPE (query), pad);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstPad *peer;
GstFormat format;
gint64 position;
gst_query_parse_position (query, &format, NULL);
if ((peer = gst_pad_get_peer (demux->sinkpad)) != NULL) {
res = gst_pad_query (peer, query);
gst_object_unref (peer);
if (res)
break;
}
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (demux, "position not supported for format %d",
format);
goto not_supported;
}
position = demux->base_time;
if (demux->current_scr != G_MAXUINT64 && demux->first_scr != G_MAXUINT64) {
position +=
MPEGTIME_TO_GSTTIME (demux->current_scr - demux->scr_adjust -
demux->first_scr);
}
GST_LOG_OBJECT (demux, "Position at GStreamer Time:%" GST_TIME_FORMAT,
GST_TIME_ARGS (position));
gst_query_set_position (query, format, position);
res = TRUE;
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
gint64 duration;
GstPad *peer;
gst_query_parse_duration (query, &format, NULL);
if ((peer = gst_pad_get_peer (demux->sinkpad)) == NULL) {
GST_DEBUG_OBJECT (demux, "duration not possible, no peer");
goto not_supported;
}
/* For any format other than bytes, see if upstream knows first */
if (format == GST_FORMAT_BYTES) {
GST_DEBUG_OBJECT (demux, "duration not supported for format %d",
format);
gst_object_unref (peer);
goto not_supported;
}
if (gst_pad_query (peer, query)) {
gst_object_unref (peer);
res = TRUE;
break;
}
/* Upstream didn't know, so we can only answer TIME queries from
* here on */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (demux, "duration not supported for format %d",
format);
gst_object_unref (peer);
goto not_supported;
}
if (demux->mux_rate == -1) {
GST_DEBUG_OBJECT (demux, "duration not possible, no mux_rate");
gst_object_unref (peer);
goto not_supported;
}
gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
if (!gst_pad_query (peer, query)) {
GST_LOG_OBJECT (demux, "query on peer pad failed");
gst_object_unref (peer);
goto not_supported;
}
gst_object_unref (peer);
gst_query_parse_duration (query, &format, &duration);
duration = BYTES_TO_GSTTIME (duration);
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (demux);
return res;
not_supported:
{
gst_object_unref (demux);
return FALSE;
}
}
static void
gst_flups_demux_reset_psm (GstFluPSDemux * demux)
{
gint i;
#define FILL_TYPE(start, stop, type) \
for (i=start; i <= stop; i++) \
demux->psm[i] = type;
FILL_TYPE (0x00, 0x1f, -1);
FILL_TYPE (0x20, 0x3f, ST_PS_DVD_SUBPICTURE);
FILL_TYPE (0x40, 0x7f, -1);
FILL_TYPE (0x80, 0x87, ST_PS_AUDIO_AC3);
FILL_TYPE (0x88, 0x9f, ST_PS_AUDIO_DTS);
FILL_TYPE (0xa0, 0xaf, ST_PS_AUDIO_LPCM);
FILL_TYPE (0xbd, 0xbd, -1);
FILL_TYPE (0xc0, 0xdf, ST_AUDIO_MPEG1);
FILL_TYPE (0xe0, 0xef, ST_GST_VIDEO_MPEG1_OR_2);
FILL_TYPE (0xf0, 0xff, -1);
#undef FILL_TYPE
}
static GstFlowReturn
gst_flups_demux_parse_pack_start (GstFluPSDemux * demux)
{
const guint8 *data;
guint length;
guint32 scr1, scr2;
guint64 scr, scr_adjusted, new_rate;
GstClockTime new_time;
GST_DEBUG ("parsing pack start");
/* fixed length to begin with, start code and two scr values */
length = 8 + 4;
if (!(data = gst_adapter_peek (demux->adapter, length)))
goto need_more_data;
/* skip start code */
data += 4;
scr1 = GUINT32_FROM_BE (*(guint32 *) data);
scr2 = GUINT32_FROM_BE (*(guint32 *) (data + 4));
/* start parsing the stream */
if ((*data & 0xc0) == 0x40) {
guint32 scr_ext;
guint32 next32;
guint8 stuffing_bytes;
GST_DEBUG ("Found MPEG2 stream");
demux->is_mpeg2_pack = TRUE;
/* mpeg2 has more data */
length += 2;
if (gst_adapter_available (demux->adapter) < length)
goto need_more_data;
/* :2=01 ! scr:3 ! marker:1==1 ! scr:15 ! marker:1==1 ! scr:15 */
/* check markers */
if ((scr1 & 0xc4000400) != 0x44000400)
goto lost_sync;
scr = ((guint64) scr1 & 0x38000000) << 3;
scr |= ((guint64) scr1 & 0x03fff800) << 4;
scr |= ((guint64) scr1 & 0x000003ff) << 5;
scr |= ((guint64) scr2 & 0xf8000000) >> 27;
/* marker:1==1 ! scr_ext:9 ! marker:1==1 */
if ((scr2 & 0x04010000) != 0x04010000)
goto lost_sync;
scr_ext = (scr2 & 0x03fe0000) >> 17;
/* We keep the offset of this scr */
demux->last_scr_offset = demux->adapter_offset + 12;
GST_DEBUG_OBJECT (demux, "SCR: 0x%08x SCRE: 0x%08x", scr, scr_ext);
if (scr_ext) {
scr = (scr * 300 + scr_ext % 300) / 300;
}
/* SCR has been converted into units of 90Khz ticks to make it comparable
to DTS/PTS, that also implies 1 tick rounding error */
data += 6;
/* PMR:22 ! :2==11 ! reserved:5 ! stuffing_len:3 */
next32 = (GUINT32_FROM_BE ((*(guint32 *) data)));
if ((next32 & 0x00000300) != 0x00000300)
goto lost_sync;
new_rate = (next32 & 0xfffffc00) >> 10;
stuffing_bytes = (next32 & 0x07);
GST_DEBUG_OBJECT (demux, "stuffing bytes: %d", stuffing_bytes);
data += 4;
while (stuffing_bytes--) {
if (*data++ != 0xff)
goto lost_sync;
}
} else {
GST_DEBUG ("Found MPEG1 stream");
demux->is_mpeg2_pack = FALSE;
/* check markers */
if ((scr1 & 0xf1000100) != 0x21000100)
goto lost_sync;
if ((scr2 & 0x01800001) != 0x01800001)
goto lost_sync;
/* :4=0010 ! scr:3 ! marker:1==1 ! scr:15 ! marker:1==1 ! scr:15 ! marker:1==1 */
scr = ((guint64) scr1 & 0x0e000000) << 5;
scr |= ((guint64) scr1 & 0x00fffe00) << 6;
scr |= ((guint64) scr1 & 0x000000ff) << 7;
scr |= ((guint64) scr2 & 0xfe000000) >> 25;
/* We keep the offset of this scr */
demux->last_scr_offset = demux->adapter_offset + 8;
/* marker:1==1 ! mux_rate:22 ! marker:1==1 */
new_rate = (scr2 & 0x007ffffe) >> 1;
data += 8;
}
new_rate *= MPEG_MUX_RATE_MULT;
/* scr adjusted is the new scr found + the colected adjustment */
scr_adjusted = scr + demux->scr_adjust;
/* keep the first src in order to calculate delta time */
if (demux->first_scr == G_MAXUINT64) {
demux->first_scr = scr;
demux->first_scr_offset = demux->last_scr_offset;
if (demux->sink_segment.format == GST_FORMAT_TIME) {
demux->base_time = demux->sink_segment.time;
} else {
demux->base_time = MPEGTIME_TO_GSTTIME (demux->first_scr);
}
/* at begin consider the new_rate as the scr rate, bytes/clock ticks */
demux->scr_rate_n = new_rate;
demux->scr_rate_d = CLOCK_FREQ;
} else if (demux->first_scr_offset != demux->last_scr_offset) {
/* estimate byte rate related to the SCR */
demux->scr_rate_n = demux->last_scr_offset - demux->first_scr_offset;
demux->scr_rate_d = scr - demux->first_scr;
}
GST_DEBUG_OBJECT (demux,
"SCR: %" G_GINT64_FORMAT " (%" G_GINT64_FORMAT "), mux_rate %"
G_GINT64_FORMAT ", GStreamer Time:%" GST_TIME_FORMAT,
scr, scr_adjusted, new_rate,
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME ((guint64) scr - demux->first_scr)));
GST_DEBUG_OBJECT (demux, "%s mode scr: %" G_GUINT64_FORMAT " at %"
G_GUINT64_FORMAT ", first scr: %" G_GUINT64_FORMAT
" at %" G_GUINT64_FORMAT ", scr rate: %" G_GUINT64_FORMAT
"/%" G_GUINT64_FORMAT "(%f)",
((demux->sink_segment.rate >= 0.0) ? "forward" : "backward"),
scr, demux->last_scr_offset,
demux->first_scr, demux->first_scr_offset,
demux->scr_rate_n, demux->scr_rate_d,
(float) demux->scr_rate_n / demux->scr_rate_d);
/* adjustment of the SCR */
if (demux->current_scr != G_MAXUINT64) {
gint64 diff;
guint64 old_scr, old_mux_rate, bss, adjust;
/* keep SCR of the previous packet */
old_scr = demux->current_scr;
old_mux_rate = demux->mux_rate;
/* Bytes since SCR is the amount we placed in the adapter since then
* (demux->bytes_since_scr) minus the amount remaining in the adapter,
* clamped to >= 0 */
bss = MAX (0, (gint) (demux->bytes_since_scr -
gst_adapter_available (demux->adapter)));
/* estimate the new SCR using the previous one according the notes
on point 2.5.2.2 of the ISO/IEC 13818-1 document */
adjust = (bss * CLOCK_FREQ) / old_mux_rate;
if (demux->sink_segment.rate >= 0.0)
demux->next_scr = old_scr + adjust;
else
demux->next_scr = old_scr - adjust;
GST_DEBUG_OBJECT (demux,
"bss: %" G_GUINT64_FORMAT ", next_scr: %" G_GUINT64_FORMAT
", old_scr: %" G_GUINT64_FORMAT ", scr: %" G_GUINT64_FORMAT,
bss, demux->next_scr, old_scr, scr_adjusted);
/* calculate the absolute deference between the last scr and
the new one */
if (old_scr > scr_adjusted)
diff = old_scr - scr_adjusted;
else
diff = scr_adjusted - old_scr;
/* if the difference is more than 1 second we need to reconfigure
adjustment */
if (diff > CLOCK_FREQ) {
#if 0
demux->scr_adjust = demux->next_scr - scr;
GST_DEBUG_OBJECT (demux, "discont found, diff: %" G_GINT64_FORMAT
", adjust %" G_GINT64_FORMAT, diff, demux->scr_adjust);
scr_adjusted = demux->next_scr;
#else
GST_WARNING_OBJECT (demux, "Unexpected SCR diff of %" G_GINT64_FORMAT,
diff);
#endif
} else {
demux->next_scr = scr_adjusted;
}
}
/* update the current_scr and rate members */
demux->mux_rate = new_rate;
demux->current_scr = scr_adjusted;
new_time = MPEGTIME_TO_GSTTIME (scr_adjusted);
if (new_time != GST_CLOCK_TIME_NONE) {
// g_print ("SCR now %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (new_time));
gst_segment_set_last_stop (&demux->src_segment, GST_FORMAT_TIME, new_time);
gst_flups_demux_send_segment_updates (demux, new_time);
}
/* Reset the bytes_since_scr value to count the data remaining in the
* adapter */
demux->bytes_since_scr = gst_adapter_available (demux->adapter);
gst_adapter_flush (demux->adapter, length);
ADAPTER_OFFSET_FLUSH (length);
return GST_FLOW_OK;
lost_sync:
{
GST_DEBUG_OBJECT (demux, "lost sync");
return GST_FLOW_LOST_SYNC;
}
need_more_data:
{
GST_DEBUG_OBJECT (demux, "need more data");
return GST_FLOW_NEED_MORE_DATA;
}
}
static GstFlowReturn
gst_flups_demux_parse_sys_head (GstFluPSDemux * demux)
{
guint16 length;
const guint8 *data;
gboolean csps;
/* start code + length */
if (!(data = gst_adapter_peek (demux->adapter, 6)))
goto need_more_data;
/* skip start code */
data += 4;
length = GST_READ_UINT16_BE (data);
GST_DEBUG_OBJECT (demux, "length %d", length);
length += 6;
if (!(data = gst_adapter_peek (demux->adapter, length)))
goto need_more_data;
/* skip start code and length */
data += 6;
/* marker:1==1 ! rate_bound:22 | marker:1==1 */
if ((*data & 0x80) != 0x80)
goto marker_expected;
{
guint32 rate_bound;
if ((data[2] & 0x01) != 0x01)
goto marker_expected;
rate_bound = ((guint32) data[0] & 0x7f) << 15;
rate_bound |= ((guint32) data[1]) << 7;
rate_bound |= ((guint32) data[2] & 0xfe) >> 1;
rate_bound *= MPEG_MUX_RATE_MULT;
GST_DEBUG_OBJECT (demux, "rate bound %u", rate_bound);
data += 3;
}
/* audio_bound:6==1 ! fixed:1 | constrained:1 */
{
guint8 audio_bound;
gboolean fixed;
/* max number of simultaneous audio streams active */
audio_bound = (data[0] & 0xfc) >> 2;
/* fixed or variable bitrate */
fixed = (data[0] & 0x02) == 0x02;
/* meeting constraints */
csps = (data[0] & 0x01) == 0x01;
GST_DEBUG_OBJECT (demux, "audio_bound %d, fixed %d, constrained %d",
audio_bound, fixed, csps);
data += 1;
}
/* audio_lock:1 | video_lock:1 | marker:1==1 | video_bound:5 */
{
gboolean audio_lock;
gboolean video_lock;
guint8 video_bound;
audio_lock = (data[0] & 0x80) == 0x80;
video_lock = (data[0] & 0x40) == 0x40;
if ((data[0] & 0x20) != 0x20)
goto marker_expected;
/* max number of simultaneous video streams active */
video_bound = (data[0] & 0x1f);
GST_DEBUG_OBJECT (demux, "audio_lock %d, video_lock %d, video_bound %d",
audio_lock, video_lock, video_bound);
data += 1;
}
/* packet_rate_restriction:1 | reserved:7==0x7F */
{
gboolean packet_rate_restriction;
if ((data[0] & 0x7f) != 0x7f)
goto marker_expected;
/* only valid if csps is set */
if (csps) {
packet_rate_restriction = (data[0] & 0x80) == 0x80;
GST_DEBUG_OBJECT (demux, "packet_rate_restriction %d",
packet_rate_restriction);
}
}
data += 1;
{
gint stream_count = (length - 12) / 3;
gint i;
GST_DEBUG_OBJECT (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;
stream_id = *data++;
if (!(stream_id & 0x80))
goto sys_len_error;
/* check marker bits */
if ((*data & 0xC0) != 0xC0)
goto no_placeholder_bits;
STD_buffer_bound_scale = *data & 0x20;
STD_buffer_size_bound = ((guint16) (*data++ & 0x1F)) << 8;
STD_buffer_size_bound |= *data++;
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;
}
GST_DEBUG_OBJECT (demux, "STD_buffer_bound_scale %d",
STD_buffer_bound_scale);
GST_DEBUG_OBJECT (demux, "STD_buffer_size_bound %d or %d bytes",
STD_buffer_size_bound, buf_byte_size_bound);
}
}
gst_adapter_flush (demux->adapter, length);
ADAPTER_OFFSET_FLUSH (length);
return GST_FLOW_OK;
/* ERRORS */
marker_expected:
{
GST_DEBUG_OBJECT (demux, "expecting marker");
return GST_FLOW_LOST_SYNC;
}
no_placeholder_bits:
{
GST_DEBUG_OBJECT (demux, "expecting placeholder bit values"
" '11' after stream id");
return GST_FLOW_LOST_SYNC;
}
sys_len_error:
{
GST_DEBUG_OBJECT (demux, "error in system header length");
return GST_FLOW_LOST_SYNC;
}
need_more_data:
{
GST_DEBUG_OBJECT (demux, "need more data");
return GST_FLOW_NEED_MORE_DATA;
}
}
static GstFlowReturn
gst_flups_demux_parse_psm (GstFluPSDemux * demux)
{
guint16 length = 0, info_length = 0, es_map_length = 0;
guint8 psm_version = 0;
const guint8 *data, *es_map_base;
gboolean applicable;
/* start code + length */
if (!(data = gst_adapter_peek (demux->adapter, 6)))
goto need_more_data;
/* skip start code */
data += 4;
length = GST_READ_UINT16_BE (data);
GST_DEBUG_OBJECT (demux, "length %u", length);
if (G_UNLIKELY (length > 0x3FA))
goto psm_len_error;
length += 6;
if (!(data = gst_adapter_peek (demux->adapter, length)))
goto need_more_data;
/* skip start code and length */
data += 6;
/* Read PSM applicable bit together with version */
psm_version = GST_READ_UINT8 (data);
applicable = (psm_version & 0x80) >> 7;
psm_version &= 0x1F;
GST_DEBUG_OBJECT (demux, "PSM version %u (applicable now %u)", psm_version,
applicable);
/* Jump over version and marker bit */
data += 2;
/* Read PS info length */
info_length = GST_READ_UINT16_BE (data);
/* Cap it to PSM length - needed bytes for ES map length and CRC */
info_length = MIN (length - 16, info_length);
GST_DEBUG_OBJECT (demux, "PS info length %u bytes", info_length);
/* Jump over that section */
data += (2 + info_length);
/* Read ES map length */
es_map_length = GST_READ_UINT16_BE (data);
/* Cap it to PSM remaining length - CRC */
es_map_length = MIN (length - (16 + info_length), es_map_length);
GST_DEBUG_OBJECT (demux, "ES map length %u bytes", es_map_length);
/* Jump over the size */
data += 2;
/* Now read the ES map */
es_map_base = data;
while (es_map_base + 4 <= data + es_map_length) {
guint8 stream_type = 0, stream_id = 0;
guint16 stream_info_length = 0;
stream_type = GST_READ_UINT8 (es_map_base);
es_map_base++;
stream_id = GST_READ_UINT8 (es_map_base);
es_map_base++;
stream_info_length = GST_READ_UINT16_BE (es_map_base);
es_map_base += 2;
/* Cap stream_info_length */
stream_info_length = MIN (data + es_map_length - es_map_base,
stream_info_length);
GST_DEBUG_OBJECT (demux, "Stream type %02X with id %02X and %u bytes info",
stream_type, stream_id, stream_info_length);
demux->psm[stream_id] = stream_type;
es_map_base += stream_info_length;
}
gst_adapter_flush (demux->adapter, length);
ADAPTER_OFFSET_FLUSH (length);
return GST_FLOW_OK;
psm_len_error:
{
GST_DEBUG_OBJECT (demux, "error in PSM length");
return GST_FLOW_LOST_SYNC;
}
need_more_data:
{
GST_DEBUG_OBJECT (demux, "need more data");
return GST_FLOW_NEED_MORE_DATA;
}
}
static void
gst_flups_demux_resync_cb (GstPESFilter * filter, GstFluPSDemux * demux)
{
}
static GstFlowReturn
gst_flups_demux_data_cb (GstPESFilter * filter, gboolean first,
GstBuffer * buffer, GstFluPSDemux * demux)
{
GstBuffer *out_buf;
GstFlowReturn ret = GST_FLOW_OK;
gint stream_type;
guint32 start_code;
guint8 id;
guint8 *data;
guint datalen;
guint offset = 0;
data = GST_BUFFER_DATA (buffer);
datalen = GST_BUFFER_SIZE (buffer);
start_code = filter->start_code;
id = filter->id;
if (first) {
/* find the stream type */
stream_type = demux->psm[id];
if (stream_type == -1) {
/* no stream type, if PS1, get the new id */
if (start_code == ID_PRIVATE_STREAM_1 && datalen >= 2) {
guint8 nframes;
/* VDR writes A52 streams without any header bytes
* (see ftp://ftp.mplayerhq.hu/MPlayer/samples/MPEG-VOB/vdr-AC3) */
if (datalen >= 4) {
guint hdr = GST_READ_UINT32_BE (data);
if (G_UNLIKELY ((hdr & 0xffff0000) == AC3_SYNC_WORD)) {
id = 0x80;
stream_type = demux->psm[id] = ST_GST_AUDIO_RAWA52;
GST_DEBUG_OBJECT (demux, "Found VDR raw A52 stream");
}
}
if (G_LIKELY (stream_type == -1)) {
/* new id is in the first byte */
id = data[offset++];
datalen--;
/* and remap */
stream_type = demux->psm[id];
/* Now, if it's a subpicture stream - no more, otherwise
* take the first byte too, since it's the frame count in audio
* streams and our backwards compat convention is to strip it off */
if (stream_type != ST_PS_DVD_SUBPICTURE) {
/* Number of audio frames in this packet */
nframes = data[offset++];
datalen--;
GST_DEBUG_OBJECT (demux, "private type 0x%02x, %d frames", id,
nframes);
} else {
GST_DEBUG_OBJECT (demux, "private type 0x%02x, stream type %d", id,
stream_type);
}
}
}
if (stream_type == -1)
goto unknown_stream_type;
}
if (filter->pts != -1) {
demux->next_pts = filter->pts + demux->scr_adjust;
GST_DEBUG_OBJECT (demux, "PTS = %" G_GUINT64_FORMAT
"(%" G_GUINT64_FORMAT ")", filter->pts, demux->next_pts);
} else
demux->next_pts = G_MAXUINT64;
if (filter->dts != -1) {
demux->next_dts = filter->dts + demux->scr_adjust;
} else {
demux->next_dts = demux->next_pts;
}
GST_DEBUG_OBJECT (demux, "DTS = orig %" G_GUINT64_FORMAT
" (%" G_GUINT64_FORMAT ")", filter->dts, demux->next_dts);
demux->current_stream = gst_flups_demux_get_stream (demux, id, stream_type);
}
if (demux->current_stream == NULL) {
GST_DEBUG_OBJECT (demux, "Dropping buffer for unknown stream id 0x%02x",
id);
goto done;
}
/* After 2 seconds of bitstream emit no more pads */
if (demux->need_no_more_pads
&& (demux->current_scr - demux->first_scr - demux->scr_adjust) >
2 * CLOCK_FREQ) {
GST_DEBUG_OBJECT (demux, "no more pads, notifying");
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
demux->need_no_more_pads = FALSE;
}
/* If the stream is not-linked, don't bother creating a sub-buffer
* to send to it, unless we're processing a discont (which resets
* the not-linked status and tries again */
if (demux->current_stream->discont) {
GST_DEBUG_OBJECT (demux, "stream is discont");
demux->current_stream->notlinked = FALSE;
}
if (demux->current_stream->notlinked == FALSE) {
out_buf = gst_buffer_create_sub (buffer, offset, datalen);
ret = gst_flups_demux_send_data (demux, demux->current_stream, out_buf);
if (ret == GST_FLOW_NOT_LINKED) {
demux->current_stream->notlinked = TRUE;
ret = GST_FLOW_OK;
}
}
done:
gst_buffer_unref (buffer);
return ret;
/* ERRORS */
unknown_stream_type:
{
GST_DEBUG_OBJECT (demux, "unknown stream type %02x", id);
ret = GST_FLOW_OK;
goto done;
}
}
static gboolean
gst_flups_demux_resync (GstFluPSDemux * demux, gboolean save)
{
const guint8 *data;
gint avail;
guint32 code;
gint offset;
gboolean found;
avail = gst_adapter_available (demux->adapter);
if (avail < 4)
goto need_data;
/* Common case, read 4 bytes an check it */
data = gst_adapter_peek (demux->adapter, 4);
/* read currect code */
code = GST_READ_UINT32_BE (data);
/* The common case is that the sync code is at 0 bytes offset */
if (G_LIKELY ((code & 0xffffff00) == 0x100L)) {
GST_LOG_OBJECT (demux, "Found resync code %08x after 0 bytes", code);
demux->last_sync_code = code;
return TRUE;
}
/* Otherwise, we are starting at byte 4 and we need to search
the sync code in all available data in the adapter */
offset = 4;
if (offset >= avail)
goto need_data; /* Not enough data to find sync */
data = gst_adapter_peek (demux->adapter, avail);
do {
code = (code << 8) | data[offset++];
found = (code & 0xffffff00) == 0x100L;
} while (offset < avail && !found);
if (!save || demux->sink_segment.rate >= 0.0) {
GST_LOG_OBJECT (demux, "flushing %d bytes", offset - 4);
/* forward playback, we can discard and flush the skipped bytes */
gst_adapter_flush (demux->adapter, offset - 4);
ADAPTER_OFFSET_FLUSH (offset - 4);
} else {
if (found) {
GST_LOG_OBJECT (demux, "reverse saving %d bytes", offset - 4);
/* reverse playback, we keep the flushed bytes and we will append them to
* the next buffer in the chain function, which is the previous buffer in
* the stream. */
gst_adapter_push (demux->rev_adapter,
gst_adapter_take_buffer (demux->adapter, offset - 4));
} else {
GST_LOG_OBJECT (demux, "reverse saving %d bytes", avail);
/* nothing found, keep all bytes */
gst_adapter_push (demux->rev_adapter,
gst_adapter_take_buffer (demux->adapter, avail));
}
}
if (found) {
GST_LOG_OBJECT (demux, "Found resync code %08x after %d bytes",
code, offset - 4);
demux->last_sync_code = code;
} else {
GST_LOG_OBJECT (demux, "No resync after skipping %d", offset);
}
return found;
need_data:
{
GST_LOG_OBJECT (demux, "we need more data for resync %d", avail);
return FALSE;
}
}
static inline gboolean
gst_flups_demux_is_pes_sync (guint32 sync)
{
return ((sync & 0xfc) == 0xbc) ||
((sync & 0xe0) == 0xc0) || ((sync & 0xf0) == 0xe0);
}
static GstFlowReturn
gst_flups_demux_chain (GstPad * pad, GstBuffer * buffer)
{
GstFluPSDemux *demux = GST_FLUPS_DEMUX (gst_pad_get_parent (pad));
GstFlowReturn ret = GST_FLOW_OK;
guint32 avail;
gboolean save, discont;
discont = GST_BUFFER_IS_DISCONT (buffer);
if (discont) {
GST_LOG_OBJECT (demux, "Received buffer with discont flag and"
" offset %" G_GUINT64_FORMAT, GST_BUFFER_OFFSET (buffer));
gst_pes_filter_drain (&demux->filter);
gst_flups_demux_mark_discont (demux);
/* mark discont on all streams */
if (demux->sink_segment.rate >= 0.0) {
demux->current_scr = G_MAXUINT64;
demux->bytes_since_scr = 0;
}
} else {
GST_LOG_OBJECT (demux, "Received buffer with offset %" G_GUINT64_FORMAT,
GST_BUFFER_OFFSET (buffer));
}
/* We keep the offset to interpolate SCR */
demux->adapter_offset = GST_BUFFER_OFFSET (buffer);
gst_adapter_push (demux->adapter, buffer);
demux->bytes_since_scr += GST_BUFFER_SIZE (buffer);
avail = gst_adapter_available (demux->rev_adapter);
if (avail > 0) {
GST_LOG_OBJECT (demux, "appending %u saved bytes", avail);
/* if we have a previous reverse chunk, append this now */
/* FIXME this code assumes we receive discont buffers all thei
* time */
gst_adapter_push (demux->adapter,
gst_adapter_take_buffer (demux->rev_adapter, avail));
}
avail = gst_adapter_available (demux->adapter);
GST_LOG_OBJECT (demux, "avail now: %d, state %d", avail, demux->filter.state);
switch (demux->filter.state) {
case STATE_DATA_SKIP:
case STATE_DATA_PUSH:
ret = gst_pes_filter_process (&demux->filter);
break;
case STATE_HEADER_PARSE:
break;
default:
break;
}
switch (ret) {
case GST_FLOW_NEED_MORE_DATA:
/* Go and get more data */
ret = GST_FLOW_OK;
goto done;
case GST_FLOW_LOST_SYNC:
/* for FLOW_OK or lost-sync, carry onto resync */
ret = GST_FLOW_OK;
break;
case GST_FLOW_OK:
break;
default:
/* Any other return value should be sent upstream immediately */
goto done;
}
/* align adapter data to sync boundary, we keep the data up to the next sync
* point. */
save = TRUE;
while (gst_flups_demux_resync (demux, save)) {
gboolean ps_sync = TRUE;
/* now switch on last synced byte */
switch (demux->last_sync_code) {
case ID_PS_PACK_START_CODE:
ret = gst_flups_demux_parse_pack_start (demux);
break;
case ID_PS_SYSTEM_HEADER_START_CODE:
ret = gst_flups_demux_parse_sys_head (demux);
break;
case ID_PS_END_CODE:
ret = GST_FLOW_OK;
goto done;
case ID_PS_PROGRAM_STREAM_MAP:
ret = gst_flups_demux_parse_psm (demux);
break;
default:
if (gst_flups_demux_is_pes_sync (demux->last_sync_code)) {
ret = gst_pes_filter_process (&demux->filter);
} else {
GST_DEBUG_OBJECT (demux, "sync_code=%08x, non PES sync found"
", continuing", demux->last_sync_code);
ps_sync = FALSE;
ret = GST_FLOW_LOST_SYNC;
}
break;
}
/* if we found a ps sync, we stop saving the data, any non-ps sync gets
* saved up to the next ps sync. */
if (ps_sync)
save = FALSE;
switch (ret) {
case GST_FLOW_NEED_MORE_DATA:
GST_DEBUG_OBJECT (demux, "need more data");
ret = GST_FLOW_OK;
goto done;
case GST_FLOW_LOST_SYNC:
if (!save || demux->sink_segment.rate >= 0.0) {
GST_DEBUG_OBJECT (demux, "flushing 3 bytes");
gst_adapter_flush (demux->adapter, 3);
ADAPTER_OFFSET_FLUSH (3);
} else {
GST_DEBUG_OBJECT (demux, "saving 3 bytes");
gst_adapter_push (demux->rev_adapter,
gst_adapter_take_buffer (demux->adapter, 3));
}
ret = GST_FLOW_OK;
break;
default:
break;
}
}
done:
gst_object_unref (demux);
return ret;
}
static GstStateChangeReturn
gst_flups_demux_change_state (GstElement * element, GstStateChange transition)
{
GstFluPSDemux *demux = GST_FLUPS_DEMUX (element);
GstStateChangeReturn result;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
demux->adapter = gst_adapter_new ();
demux->rev_adapter = gst_adapter_new ();
demux->adapter_offset = G_MAXUINT64;
gst_pes_filter_init (&demux->filter, demux->adapter,
&demux->adapter_offset);
gst_pes_filter_set_callbacks (&demux->filter,
(GstPESFilterData) gst_flups_demux_data_cb,
(GstPESFilterResync) gst_flups_demux_resync_cb, demux);
demux->filter.gather_pes = TRUE;
demux->first_scr = G_MAXUINT64;
demux->bytes_since_scr = 0;
demux->current_scr = G_MAXUINT64;
demux->base_time = G_MAXUINT64;
demux->scr_rate_n = G_MAXUINT64;
demux->scr_rate_d = G_MAXUINT64;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
demux->current_scr = G_MAXUINT64;
demux->mux_rate = G_MAXUINT64;
demux->next_pts = G_MAXUINT64;
demux->next_dts = G_MAXUINT64;
demux->first_scr = G_MAXUINT64;
demux->bytes_since_scr = 0;
demux->base_time = G_MAXUINT64;
demux->scr_rate_n = G_MAXUINT64;
demux->scr_rate_d = G_MAXUINT64;
demux->need_no_more_pads = TRUE;
gst_flups_demux_reset_psm (demux);
gst_segment_init (&demux->sink_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&demux->src_segment, GST_FORMAT_TIME);
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_flups_demux_reset (demux);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_pes_filter_uninit (&demux->filter);
g_object_unref (demux->adapter);
demux->adapter = NULL;
g_object_unref (demux->rev_adapter);
demux->rev_adapter = NULL;
break;
default:
break;
}
return result;
}
gboolean
gst_flups_demux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gstflupesfilter_debug, "rsnpesfilter", 0,
"MPEG program stream PES filter debug");
GST_DEBUG_CATEGORY_INIT (gstflupsdemux_debug, "rsndvddemux", 0,
"MPEG program stream demuxer debug");
return TRUE;
}
Reference in a new issue View git blame Copy permalink