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gstreamer/ext/resindvd/gstmpegdemux.c
Tim-Philipp Müller c31559841a resindvd: fix unaligned access in this copy of mpegdemux as well 
See #606371.
2010-01-11 01:03:38 +00:00

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/*
* 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 = GST_READ_UINT32_BE (data);
scr2 = GST_READ_UINT32_BE (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", (guint) 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 = GST_READ_UINT32_BE (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;
}
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