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gstreamer/gst/realmedia/rmdemux.c
Wim Taymans 5aa3023505 gst/realmedia/rmdemux.c: Add suport for mpeg4 and aac audio. See #556714. 
Original commit message from CVS:
* gst/realmedia/rmdemux.c: (gst_rmdemux_add_stream),
(gst_rmdemux_descramble_mp4a_audio),
(gst_rmdemux_handle_scrambled_packet):
Add suport for mpeg4 and aac audio. See #556714.
2008-10-24 12:47:05 +00:00

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/* GStreamer RealMedia demuxer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2003> David A. Schleef <ds@schleef.org>
* Copyright (C) <2004> Stephane Loeuillet <gstreamer@leroutier.net>
* Copyright (C) <2005> Owen Fraser-Green <owen@discobabe.net>
* Copyright (C) <2005> Michael Smith <fluendo.com>
* Copyright (C) <2006> Wim Taymans <wim@fluendo.com>
* Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "rmdemux.h"
#include "rdtdepay.h"
#include "rdtmanager.h"
#include "rtspreal.h"
#include "rmutils.h"
#include "rademux.h"
#include <string.h>
#include <ctype.h>
#define RMDEMUX_GUINT32_GET(a) GST_READ_UINT32_BE(a)
#define RMDEMUX_GUINT16_GET(a) GST_READ_UINT16_BE(a)
#define RMDEMUX_FOURCC_GET(a) GST_READ_UINT32_LE(a)
#define HEADER_SIZE 10
#define DATA_SIZE 8
#define MAX_FRAGS 256
typedef struct _GstRMDemuxIndex GstRMDemuxIndex;
struct _GstRMDemuxStream
{
guint32 subtype;
guint32 fourcc;
guint32 subformat;
guint32 format;
int id;
GstPad *pad;
GstFlowReturn last_flow;
gboolean discont;
int timescale;
int sample_index;
GstRMDemuxIndex *index;
int index_length;
gint framerate_numerator;
gint framerate_denominator;
guint32 seek_offset;
guint16 width;
guint16 height;
guint16 flavor;
guint16 rate; /* samplerate */
guint16 n_channels; /* channels */
guint16 sample_width; /* bits_per_sample */
guint16 leaf_size; /* subpacket_size */
guint32 packet_size; /* coded_frame_size */
guint16 version;
guint32 extra_data_size; /* codec_data_length */
guint8 *extra_data; /* extras */
gboolean needs_descrambling;
guint subpackets_needed; /* subpackets needed for descrambling */
GPtrArray *subpackets; /* array containing subpacket GstBuffers */
/* Variables needed for fixing timestamps. */
GstClockTime next_ts, last_ts;
guint16 next_seq, last_seq;
gint frag_seqnum;
gint frag_subseq;
guint frag_length;
guint frag_current;
guint frag_count;
guint frag_offset[MAX_FRAGS];
GstAdapter *adapter;
GstTagList *pending_tags;
};
struct _GstRMDemuxIndex
{
guint32 offset;
GstClockTime timestamp;
};
static GstElementDetails gst_rmdemux_details = {
"RealMedia Demuxer",
"Codec/Demuxer",
"Demultiplex a RealMedia file into audio and video streams",
"David Schleef <ds@schleef.org>"
};
static GstStaticPadTemplate gst_rmdemux_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/vnd.rn-realmedia")
);
static GstStaticPadTemplate gst_rmdemux_videosrc_template =
GST_STATIC_PAD_TEMPLATE ("video_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_rmdemux_audiosrc_template =
GST_STATIC_PAD_TEMPLATE ("audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (rmdemux_debug);
#define GST_CAT_DEFAULT rmdemux_debug
static GstElementClass *parent_class = NULL;
static void gst_rmdemux_class_init (GstRMDemuxClass * klass);
static void gst_rmdemux_base_init (GstRMDemuxClass * klass);
static void gst_rmdemux_init (GstRMDemux * rmdemux);
static void gst_rmdemux_finalize (GObject * object);
static GstStateChangeReturn gst_rmdemux_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_rmdemux_chain (GstPad * pad, GstBuffer * buffer);
static void gst_rmdemux_loop (GstPad * pad);
static gboolean gst_rmdemux_sink_activate (GstPad * sinkpad);
static gboolean gst_rmdemux_sink_activate_push (GstPad * sinkpad,
gboolean active);
static gboolean gst_rmdemux_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_rmdemux_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_rmdemux_src_event (GstPad * pad, GstEvent * event);
static void gst_rmdemux_send_event (GstRMDemux * rmdemux, GstEvent * event);
static const GstQueryType *gst_rmdemux_src_query_types (GstPad * pad);
static gboolean gst_rmdemux_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_rmdemux_perform_seek (GstRMDemux * rmdemux,
GstEvent * event);
static void gst_rmdemux_parse__rmf (GstRMDemux * rmdemux, const guint8 * data,
int length);
static void gst_rmdemux_parse_prop (GstRMDemux * rmdemux, const guint8 * data,
int length);
static void gst_rmdemux_parse_mdpr (GstRMDemux * rmdemux,
const guint8 * data, int length);
static guint gst_rmdemux_parse_indx (GstRMDemux * rmdemux, const guint8 * data,
int length);
static void gst_rmdemux_parse_data (GstRMDemux * rmdemux, const guint8 * data,
int length);
static void gst_rmdemux_parse_cont (GstRMDemux * rmdemux, const guint8 * data,
int length);
static GstFlowReturn gst_rmdemux_parse_packet (GstRMDemux * rmdemux,
GstBuffer * in, guint16 version);
static void gst_rmdemux_parse_indx_data (GstRMDemux * rmdemux,
const guint8 * data, int length);
static void gst_rmdemux_stream_clear_cached_subpackets (GstRMDemux * rmdemux,
GstRMDemuxStream * stream);
static GstRMDemuxStream *gst_rmdemux_get_stream_by_id (GstRMDemux * rmdemux,
int id);
static GType
gst_rmdemux_get_type (void)
{
static GType rmdemux_type = 0;
if (!rmdemux_type) {
static const GTypeInfo rmdemux_info = {
sizeof (GstRMDemuxClass),
(GBaseInitFunc) gst_rmdemux_base_init, NULL,
(GClassInitFunc) gst_rmdemux_class_init,
NULL, NULL, sizeof (GstRMDemux), 0,
(GInstanceInitFunc) gst_rmdemux_init,
};
rmdemux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstRMDemux", &rmdemux_info,
0);
}
return rmdemux_type;
}
static void
gst_rmdemux_base_init (GstRMDemuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_videosrc_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_audiosrc_template));
gst_element_class_set_details (element_class, &gst_rmdemux_details);
}
static void
gst_rmdemux_class_init (GstRMDemuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rmdemux_change_state);
GST_DEBUG_CATEGORY_INIT (rmdemux_debug, "rmdemux",
0, "Demuxer for Realmedia streams");
gobject_class->finalize = gst_rmdemux_finalize;
}
static void
gst_rmdemux_finalize (GObject * object)
{
GstRMDemux *rmdemux = GST_RMDEMUX (object);
if (rmdemux->adapter) {
g_object_unref (rmdemux->adapter);
rmdemux->adapter = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
}
static void
gst_rmdemux_init (GstRMDemux * rmdemux)
{
rmdemux->sinkpad =
gst_pad_new_from_static_template (&gst_rmdemux_sink_template, "sink");
gst_pad_set_event_function (rmdemux->sinkpad,
GST_DEBUG_FUNCPTR (gst_rmdemux_sink_event));
gst_pad_set_chain_function (rmdemux->sinkpad,
GST_DEBUG_FUNCPTR (gst_rmdemux_chain));
gst_pad_set_activate_function (rmdemux->sinkpad,
GST_DEBUG_FUNCPTR (gst_rmdemux_sink_activate));
gst_pad_set_activatepull_function (rmdemux->sinkpad,
GST_DEBUG_FUNCPTR (gst_rmdemux_sink_activate_pull));
gst_pad_set_activatepush_function (rmdemux->sinkpad,
GST_DEBUG_FUNCPTR (gst_rmdemux_sink_activate_push));
gst_element_add_pad (GST_ELEMENT (rmdemux), rmdemux->sinkpad);
rmdemux->adapter = gst_adapter_new ();
rmdemux->first_ts = GST_CLOCK_TIME_NONE;
rmdemux->base_ts = GST_CLOCK_TIME_NONE;
rmdemux->need_newsegment = TRUE;
}
static gboolean
gst_rmdemux_sink_event (GstPad * pad, GstEvent * event)
{
GstRMDemux *rmdemux;
gboolean ret;
rmdemux = GST_RMDEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (pad, "%s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
gst_event_unref (event);
ret = TRUE;
break;
default:
ret = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (rmdemux);
return ret;
}
static gboolean
gst_rmdemux_src_event (GstPad * pad, GstEvent * event)
{
gboolean ret = TRUE;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (rmdemux, "handling src event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gboolean running;
GST_LOG_OBJECT (rmdemux, "Event on src: SEEK");
/* can't seek if we are not seekable, FIXME could pass the
* seek query upstream after converting it to bytes using
* the average bitrate of the stream. */
if (!rmdemux->seekable) {
ret = FALSE;
GST_DEBUG ("seek on non seekable stream");
goto done_unref;
}
GST_OBJECT_LOCK (rmdemux);
/* check if we can do the seek now */
running = rmdemux->running;
GST_OBJECT_UNLOCK (rmdemux);
/* now do the seek */
if (running) {
ret = gst_rmdemux_perform_seek (rmdemux, event);
} else
ret = TRUE;
gst_event_unref (event);
break;
}
default:
GST_LOG_OBJECT (rmdemux, "Event on src: type=%d", GST_EVENT_TYPE (event));
ret = gst_pad_event_default (pad, event);
break;
}
return ret;
done_unref:
GST_DEBUG ("error handling event");
gst_event_unref (event);
return ret;
}
/* Validate that this looks like a reasonable point to seek to */
static gboolean
gst_rmdemux_validate_offset (GstRMDemux * rmdemux)
{
GstBuffer *buffer;
GstFlowReturn flowret;
guint16 version, length;
gboolean ret = TRUE;
flowret = gst_pad_pull_range (rmdemux->sinkpad, rmdemux->offset, 4, &buffer);
if (flowret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (rmdemux, "Failed to pull data at offset %d",
rmdemux->offset);
return FALSE;
}
/* TODO: Can we also be seeking to a 'DATA' chunk header? Check this.
* Also, for the case we currently handle, can we check any more? It's pretty
* sucky to not be validating a little more heavily than this... */
/* This should now be the start of a data packet header. That begins with
* a 2-byte 'version' field, which has to be 0 or 1, then a length. I'm not
* certain what values are valid for length, but it must always be at least
* 4 bytes, and we can check that it won't take us past our known total size
*/
version = RMDEMUX_GUINT16_GET (GST_BUFFER_DATA (buffer));
if (version != 0 && version != 1) {
GST_DEBUG_OBJECT (rmdemux, "Expected version 0 or 1, got %d",
(int) version);
ret = FALSE;
}
length = RMDEMUX_GUINT16_GET (GST_BUFFER_DATA (buffer) + 2);
/* TODO: Also check against total stream length */
if (length < 4) {
GST_DEBUG_OBJECT (rmdemux, "Expected length >= 4, got %d", (int) length);
ret = FALSE;
}
if (ret) {
rmdemux->offset += 4;
gst_adapter_clear (rmdemux->adapter);
gst_adapter_push (rmdemux->adapter, buffer);
} else {
GST_WARNING_OBJECT (rmdemux, "Failed to validate seek offset at %d",
rmdemux->offset);
}
return ret;
}
static gboolean
find_seek_offset_bytes (GstRMDemux * rmdemux, guint target)
{
int i;
GSList *cur;
gboolean ret = FALSE;
if (target < 0)
return FALSE;
for (cur = rmdemux->streams; cur; cur = cur->next) {
GstRMDemuxStream *stream = cur->data;
/* Search backwards through this stream's index until we find the first
* timestamp before our target time */
for (i = stream->index_length - 1; i >= 0; i--) {
if (stream->index[i].offset <= target) {
/* Set the seek_offset for the stream so we don't bother parsing it
* until we've passed that point */
stream->seek_offset = stream->index[i].offset;
rmdemux->offset = stream->index[i].offset;
ret = TRUE;
break;
}
}
}
return ret;
}
static gboolean
find_seek_offset_time (GstRMDemux * rmdemux, GstClockTime time)
{
int i, n_stream;
gboolean ret = FALSE;
GSList *cur;
GstClockTime earliest = GST_CLOCK_TIME_NONE;
n_stream = 0;
for (cur = rmdemux->streams; cur; cur = cur->next, n_stream++) {
GstRMDemuxStream *stream = cur->data;
/* Search backwards through this stream's index until we find the first
* timestamp before our target time */
for (i = stream->index_length - 1; i >= 0; i--) {
if (stream->index[i].timestamp <= time) {
/* Set the seek_offset for the stream so we don't bother parsing it
* until we've passed that point */
stream->seek_offset = stream->index[i].offset;
/* If it's also the earliest timestamp we've seen of all streams, then
* that's our target!
*/
if (earliest == GST_CLOCK_TIME_NONE ||
stream->index[i].timestamp < earliest) {
earliest = stream->index[i].timestamp;
rmdemux->offset = stream->index[i].offset;
GST_DEBUG_OBJECT (rmdemux,
"We're looking for %" GST_TIME_FORMAT
" and we found that stream %d has the latest index at %"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment.start), n_stream,
GST_TIME_ARGS (earliest));
}
ret = TRUE;
break;
}
}
stream->discont = TRUE;
}
return ret;
}
static gboolean
gst_rmdemux_perform_seek (GstRMDemux * rmdemux, GstEvent * event)
{
gboolean validated;
gboolean ret = TRUE;
gboolean flush, accurate;
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gboolean update;
if (event) {
GST_DEBUG_OBJECT (rmdemux, "seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* we can only seek on time */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (rmdemux, "can only seek on TIME");
goto error;
}
/* cannot yet do backwards playback */
if (rate <= 0.0) {
GST_DEBUG_OBJECT (rmdemux, "can only seek with positive rate, not %lf",
rate);
goto error;
}
} else {
GST_DEBUG_OBJECT (rmdemux, "seek without event");
flags = 0;
rate = 1.0;
}
GST_DEBUG_OBJECT (rmdemux, "seek, rate %g", rate);
flush = flags & GST_SEEK_FLAG_FLUSH;
accurate = flags & GST_SEEK_FLAG_ACCURATE;
/* first step is to unlock the streaming thread if it is
* blocked in a chain call, we do this by starting the flush. */
if (flush) {
gst_pad_push_event (rmdemux->sinkpad, gst_event_new_flush_start ());
gst_rmdemux_send_event (rmdemux, gst_event_new_flush_start ());
} else {
gst_pad_pause_task (rmdemux->sinkpad);
}
GST_LOG_OBJECT (rmdemux, "Done starting flushes");
/* now grab the stream lock so that streaming cannot continue, for
* non flushing seeks when the element is in PAUSED this could block
* forever. */
GST_PAD_STREAM_LOCK (rmdemux->sinkpad);
GST_LOG_OBJECT (rmdemux, "Took streamlock");
/* close current segment first */
if (rmdemux->segment_running && !flush) {
GstEvent *newseg;
newseg = gst_event_new_new_segment (TRUE, rmdemux->segment.rate,
GST_FORMAT_TIME, rmdemux->segment.start,
rmdemux->segment.last_stop, rmdemux->segment.time);
gst_rmdemux_send_event (rmdemux, newseg);
}
if (event) {
gst_segment_set_seek (&rmdemux->segment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
GST_DEBUG_OBJECT (rmdemux, "segment positions set to %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment.start),
GST_TIME_ARGS (rmdemux->segment.stop));
/* we need to stop flushing on the sinkpad as we're going to use it
* next. We can do this as we have the STREAM lock now. */
gst_pad_push_event (rmdemux->sinkpad, gst_event_new_flush_stop ());
GST_LOG_OBJECT (rmdemux, "Pushed FLUSH_STOP event");
/* For each stream, find the first index offset equal to or before our seek
* target. Of these, find the smallest offset. That's where we seek to.
*
* Then we pull 4 bytes from that offset, and validate that we've seeked to a
* what looks like a plausible packet.
* If that fails, restart, with the seek target set to one less than the
* offset we just tried. If we run out of places to try, treat that as a fatal
* error.
*/
if (!find_seek_offset_time (rmdemux, rmdemux->segment.last_stop)) {
GST_LOG_OBJECT (rmdemux, "Failed to find seek offset by time");
ret = FALSE;
goto done;
}
GST_LOG_OBJECT (rmdemux, "Validating offset %u", rmdemux->offset);
validated = gst_rmdemux_validate_offset (rmdemux);
while (!validated) {
GST_INFO_OBJECT (rmdemux, "Failed to validate offset at %u",
rmdemux->offset);
if (!find_seek_offset_bytes (rmdemux, rmdemux->offset - 1)) {
ret = FALSE;
goto done;
}
validated = gst_rmdemux_validate_offset (rmdemux);
}
GST_LOG_OBJECT (rmdemux, "Found final offset. Excellent!");
/* now we have a new position, prepare for streaming again */
{
/* Reset the demuxer state */
rmdemux->state = RMDEMUX_STATE_DATA_PACKET;
if (flush)
gst_rmdemux_send_event (rmdemux, gst_event_new_flush_stop ());
/* must send newsegment event from streaming thread, so just set flag */
rmdemux->need_newsegment = TRUE;
/* notify start of new segment */
if (rmdemux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT_CAST (rmdemux),
gst_message_new_segment_start (GST_OBJECT_CAST (rmdemux),
GST_FORMAT_TIME, rmdemux->segment.last_stop));
}
/* restart our task since it might have been stopped when we did the
* flush. */
gst_pad_start_task (rmdemux->sinkpad, (GstTaskFunction) gst_rmdemux_loop,
rmdemux->sinkpad);
}
done:
/* streaming can continue now */
GST_PAD_STREAM_UNLOCK (rmdemux->sinkpad);
return TRUE;
error:
{
GST_DEBUG_OBJECT (rmdemux, "seek failed");
return FALSE;
}
}
static gboolean
gst_rmdemux_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = FALSE;
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
GST_DEBUG_OBJECT (rmdemux, "Position query: no idea from demuxer!");
break;
case GST_QUERY_DURATION:{
GstFormat fmt;
gst_query_parse_duration (query, &fmt, NULL);
if (fmt == GST_FORMAT_TIME) {
GST_OBJECT_LOCK (rmdemux);
if (G_LIKELY (rmdemux->running)) {
gst_query_set_duration (query, GST_FORMAT_TIME, rmdemux->duration);
GST_DEBUG_OBJECT (rmdemux, "duration set to %" GST_TIME_FORMAT,
GST_TIME_ARGS (rmdemux->duration));
res = TRUE;
}
GST_OBJECT_UNLOCK (rmdemux);
}
break;
}
case GST_QUERY_SEEKING:{
GstFormat fmt;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
if (fmt == GST_FORMAT_TIME) {
GST_OBJECT_LOCK (rmdemux);
if (G_LIKELY (rmdemux->running)) {
gst_query_set_seeking (query, GST_FORMAT_TIME, rmdemux->seekable,
0, rmdemux->duration);
res = TRUE;
}
GST_OBJECT_UNLOCK (rmdemux);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (rmdemux);
return res;
}
static const GstQueryType *
gst_rmdemux_src_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
GST_QUERY_SEEKING,
0
};
return query_types;
}
static void
gst_rmdemux_reset (GstRMDemux * rmdemux)
{
GSList *cur;
GST_OBJECT_LOCK (rmdemux);
rmdemux->running = FALSE;
GST_OBJECT_UNLOCK (rmdemux);
for (cur = rmdemux->streams; cur; cur = cur->next) {
GstRMDemuxStream *stream = cur->data;
g_object_unref (stream->adapter);
gst_rmdemux_stream_clear_cached_subpackets (rmdemux, stream);
gst_element_remove_pad (GST_ELEMENT (rmdemux), stream->pad);
if (stream->pending_tags)
gst_tag_list_free (stream->pending_tags);
if (stream->subpackets)
g_ptr_array_free (stream->subpackets, TRUE);
g_free (stream->index);
g_free (stream);
}
g_slist_free (rmdemux->streams);
rmdemux->streams = NULL;
rmdemux->n_audio_streams = 0;
rmdemux->n_video_streams = 0;
gst_adapter_clear (rmdemux->adapter);
rmdemux->state = RMDEMUX_STATE_HEADER;
rmdemux->have_pads = FALSE;
gst_segment_init (&rmdemux->segment, GST_FORMAT_UNDEFINED);
rmdemux->first_ts = GST_CLOCK_TIME_NONE;
rmdemux->base_ts = GST_CLOCK_TIME_NONE;
rmdemux->need_newsegment = TRUE;
}
static GstStateChangeReturn
gst_rmdemux_change_state (GstElement * element, GstStateChange transition)
{
GstRMDemux *rmdemux = GST_RMDEMUX (element);
GstStateChangeReturn res;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
rmdemux->state = RMDEMUX_STATE_HEADER;
rmdemux->have_pads = FALSE;
gst_segment_init (&rmdemux->segment, GST_FORMAT_TIME);
rmdemux->running = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:{
gst_rmdemux_reset (rmdemux);
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return res;
}
/* this function is called when the pad is activated and should start
* processing data.
*
* We check if we can do random access to decide if we work push or
* pull based.
*/
static gboolean
gst_rmdemux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
/* this function gets called when we activate ourselves in push mode.
* We cannot seek (ourselves) in the stream */
static gboolean
gst_rmdemux_sink_activate_push (GstPad * pad, gboolean active)
{
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "activate_push");
rmdemux->seekable = FALSE;
return TRUE;
}
/* this function gets called when we activate ourselves in pull mode.
* We can perform random access to the resource and we start a task
* to start reading */
static gboolean
gst_rmdemux_sink_activate_pull (GstPad * pad, gboolean active)
{
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "activate_pull");
if (active) {
rmdemux->seekable = TRUE;
rmdemux->offset = 0;
rmdemux->loop_state = RMDEMUX_LOOP_STATE_HEADER;
rmdemux->data_offset = G_MAXUINT;
return gst_pad_start_task (pad, (GstTaskFunction) gst_rmdemux_loop, pad);
} else {
return gst_pad_stop_task (pad);
}
}
/* random access mode - just pass over to our chain function */
static void
gst_rmdemux_loop (GstPad * pad)
{
GstRMDemux *rmdemux;
GstBuffer *buffer;
GstFlowReturn ret = GST_FLOW_OK;
guint size;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (rmdemux, "loop with state=%d and offset=0x%x",
rmdemux->loop_state, rmdemux->offset);
switch (rmdemux->state) {
case RMDEMUX_STATE_HEADER:
size = HEADER_SIZE;
break;
case RMDEMUX_STATE_HEADER_DATA:
size = DATA_SIZE;
break;
case RMDEMUX_STATE_DATA_PACKET:
size = rmdemux->avg_packet_size;
break;
case RMDEMUX_STATE_EOS:
GST_LOG_OBJECT (rmdemux, "At EOS, pausing task");
ret = GST_FLOW_UNEXPECTED;
goto need_pause;
default:
GST_LOG_OBJECT (rmdemux, "Default: requires %d bytes (state is %d)",
(int) rmdemux->size, rmdemux->state);
size = rmdemux->size;
}
ret = gst_pad_pull_range (pad, rmdemux->offset, size, &buffer);
if (ret != GST_FLOW_OK) {
if (rmdemux->offset == rmdemux->index_offset) {
/* The index isn't available so forget about it */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_DATA;
rmdemux->offset = rmdemux->data_offset;
GST_OBJECT_LOCK (rmdemux);
rmdemux->running = TRUE;
rmdemux->seekable = FALSE;
GST_OBJECT_UNLOCK (rmdemux);
return;
} else {
GST_DEBUG_OBJECT (rmdemux, "Unable to pull %d bytes at offset 0x%08x "
"(pull_range returned flow %s, state is %d)", (gint) size,
rmdemux->offset, gst_flow_get_name (ret), GST_STATE (rmdemux));
goto need_pause;
}
}
size = GST_BUFFER_SIZE (buffer);
/* Defer to the chain function */
ret = gst_rmdemux_chain (pad, buffer);
if (ret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (rmdemux, "Chain flow failed at offset 0x%08x",
rmdemux->offset);
goto need_pause;
}
rmdemux->offset += size;
switch (rmdemux->loop_state) {
case RMDEMUX_LOOP_STATE_HEADER:
if (rmdemux->offset >= rmdemux->data_offset) {
/* It's the end of the header */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_INDEX;
rmdemux->offset = rmdemux->index_offset;
}
break;
case RMDEMUX_LOOP_STATE_INDEX:
if (rmdemux->state == RMDEMUX_STATE_HEADER) {
if (rmdemux->index_offset == 0) {
/* We've read the last index */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_DATA;
rmdemux->offset = rmdemux->data_offset;
GST_OBJECT_LOCK (rmdemux);
rmdemux->running = TRUE;
GST_OBJECT_UNLOCK (rmdemux);
} else {
/* Get the next index */
rmdemux->offset = rmdemux->index_offset;
}
}
break;
case RMDEMUX_LOOP_STATE_DATA:
break;
}
return;
/* ERRORS */
need_pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_LOG_OBJECT (rmdemux, "pausing task, reason %s", reason);
rmdemux->segment_running = FALSE;
gst_pad_pause_task (rmdemux->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
if (ret == GST_FLOW_UNEXPECTED) {
/* perform EOS logic */
if (rmdemux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
/* for segment playback we need to post when (in stream time)
* we stopped, this is either stop (when set) or the duration. */
if ((stop = rmdemux->segment.stop) == -1)
stop = rmdemux->segment.duration;
GST_LOG_OBJECT (rmdemux, "Sending segment done, at end of segment");
gst_element_post_message (GST_ELEMENT (rmdemux),
gst_message_new_segment_done (GST_OBJECT (rmdemux),
GST_FORMAT_TIME, stop));
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (rmdemux, "Sending EOS, at end of stream");
gst_rmdemux_send_event (rmdemux, gst_event_new_eos ());
}
} else {
GST_ELEMENT_ERROR (rmdemux, STREAM, FAILED,
(NULL), ("stream stopped, reason %s", reason));
gst_rmdemux_send_event (rmdemux, gst_event_new_eos ());
}
}
return;
}
}
static gboolean
gst_rmdemux_fourcc_isplausible (guint32 fourcc)
{
int i;
for (i = 0; i < 4; i++) {
if (!isprint ((int) ((unsigned char *) (&fourcc))[i])) {
return FALSE;
}
}
return TRUE;
}
static GstFlowReturn
gst_rmdemux_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
const guint8 *data;
guint16 version;
guint avail;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
if (rmdemux->base_ts == -1) {
rmdemux->base_ts = GST_BUFFER_TIMESTAMP (buffer);
GST_LOG_OBJECT (rmdemux, "base_ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (rmdemux->base_ts));
}
gst_adapter_push (rmdemux->adapter, buffer);
GST_LOG_OBJECT (rmdemux, "Chaining buffer of size %d",
GST_BUFFER_SIZE (buffer));
while (TRUE) {
avail = gst_adapter_available (rmdemux->adapter);
GST_LOG_OBJECT (rmdemux, "looping in chain, avail %u", avail);
switch (rmdemux->state) {
case RMDEMUX_STATE_HEADER:
{
if (gst_adapter_available (rmdemux->adapter) < HEADER_SIZE)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, HEADER_SIZE);
rmdemux->object_id = RMDEMUX_FOURCC_GET (data + 0);
rmdemux->size = RMDEMUX_GUINT32_GET (data + 4) - HEADER_SIZE;
rmdemux->object_version = RMDEMUX_GUINT16_GET (data + 8);
/* Sanity-check. We assume that the FOURCC is printable ASCII */
if (!gst_rmdemux_fourcc_isplausible (rmdemux->object_id)) {
/* Failed. Remain in HEADER state, try again... We flush only
* the actual FOURCC, not the entire header, because we could
* need to resync anywhere at all... really, this should never
* happen. */
GST_WARNING_OBJECT (rmdemux, "Bogus looking header, unprintable "
"FOURCC");
gst_adapter_flush (rmdemux->adapter, 4);
break;
}
GST_LOG_OBJECT (rmdemux, "header found with object_id=%"
GST_FOURCC_FORMAT
" size=%08x object_version=%d",
GST_FOURCC_ARGS (rmdemux->object_id), rmdemux->size,
rmdemux->object_version);
gst_adapter_flush (rmdemux->adapter, HEADER_SIZE);
switch (rmdemux->object_id) {
case GST_MAKE_FOURCC ('.', 'R', 'M', 'F'):
rmdemux->state = RMDEMUX_STATE_HEADER_RMF;
break;
case GST_MAKE_FOURCC ('P', 'R', 'O', 'P'):
rmdemux->state = RMDEMUX_STATE_HEADER_PROP;
break;
case GST_MAKE_FOURCC ('M', 'D', 'P', 'R'):
rmdemux->state = RMDEMUX_STATE_HEADER_MDPR;
break;
case GST_MAKE_FOURCC ('I', 'N', 'D', 'X'):
rmdemux->state = RMDEMUX_STATE_HEADER_INDX;
break;
case GST_MAKE_FOURCC ('D', 'A', 'T', 'A'):
rmdemux->state = RMDEMUX_STATE_HEADER_DATA;
break;
case GST_MAKE_FOURCC ('C', 'O', 'N', 'T'):
rmdemux->state = RMDEMUX_STATE_HEADER_CONT;
break;
default:
rmdemux->state = RMDEMUX_STATE_HEADER_UNKNOWN;
break;
}
break;
}
case RMDEMUX_STATE_HEADER_UNKNOWN:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
GST_WARNING_OBJECT (rmdemux, "Unknown object_id %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (rmdemux->object_id));
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_RMF:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
if ((rmdemux->object_version == 0) || (rmdemux->object_version == 1)) {
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse__rmf (rmdemux, data, rmdemux->size);
}
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_PROP:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_prop (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_MDPR:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_mdpr (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_CONT:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_cont (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_DATA:
{
/* If we haven't already done so then signal there are no more pads */
if (!rmdemux->have_pads) {
GST_LOG_OBJECT (rmdemux, "no more pads");
gst_element_no_more_pads (GST_ELEMENT (rmdemux));
rmdemux->have_pads = TRUE;
}
/* The actual header is only 8 bytes */
rmdemux->size = DATA_SIZE;
GST_LOG_OBJECT (rmdemux, "data available %d",
gst_adapter_available (rmdemux->adapter));
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_data (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_DATA_PACKET;
break;
}
case RMDEMUX_STATE_HEADER_INDX:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
rmdemux->size = gst_rmdemux_parse_indx (rmdemux, data, rmdemux->size);
/* Only flush the header */
gst_adapter_flush (rmdemux->adapter, HEADER_SIZE);
rmdemux->state = RMDEMUX_STATE_INDX_DATA;
break;
}
case RMDEMUX_STATE_INDX_DATA:
{
/* There's not always an data to get... */
if (rmdemux->size > 0) {
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_indx_data (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
}
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_DATA_PACKET:
{
if (gst_adapter_available (rmdemux->adapter) < 2)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, 2);
version = RMDEMUX_GUINT16_GET (data);
GST_LOG_OBJECT (rmdemux, "Data packet with version=%d", version);
if (version == 0 || version == 1) {
guint16 length;
if (gst_adapter_available (rmdemux->adapter) < 4)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, 4);
length = RMDEMUX_GUINT16_GET (data + 2);
GST_LOG_OBJECT (rmdemux, "Got length %d", length);
if (length < 4) {
GST_LOG_OBJECT (rmdemux, "length too small, dropping");
/* Invalid, just drop it */
gst_adapter_flush (rmdemux->adapter, 4);
} else {
GstBuffer *buffer;
avail = gst_adapter_available (rmdemux->adapter);
if (avail < length)
goto unlock;
GST_LOG_OBJECT (rmdemux, "we have %u available and we needed %d",
avail, length);
/* flush version and length */
gst_adapter_flush (rmdemux->adapter, 4);
length -= 4;
buffer = gst_adapter_take_buffer (rmdemux->adapter, length);
ret = gst_rmdemux_parse_packet (rmdemux, buffer, version);
rmdemux->chunk_index++;
}
if (rmdemux->chunk_index == rmdemux->n_chunks || length == 0)
rmdemux->state = RMDEMUX_STATE_HEADER;
} else {
/* Stream done */
gst_adapter_flush (rmdemux->adapter, 2);
if (rmdemux->data_offset == 0) {
GST_LOG_OBJECT (rmdemux,
"No further data, internal demux state EOS");
rmdemux->state = RMDEMUX_STATE_EOS;
} else
rmdemux->state = RMDEMUX_STATE_HEADER;
}
break;
}
case RMDEMUX_STATE_EOS:
gst_rmdemux_send_event (rmdemux, gst_event_new_eos ());
goto unlock;
default:
GST_WARNING_OBJECT (rmdemux, "Unhandled state %d", rmdemux->state);
goto unlock;
}
}
unlock:
return ret;
}
static GstRMDemuxStream *
gst_rmdemux_get_stream_by_id (GstRMDemux * rmdemux, int id)
{
GSList *cur;
for (cur = rmdemux->streams; cur; cur = cur->next) {
GstRMDemuxStream *stream = cur->data;
if (stream->id == id) {
return stream;
}
}
return NULL;
}
static void
gst_rmdemux_send_event (GstRMDemux * rmdemux, GstEvent * event)
{
GSList *cur;
for (cur = rmdemux->streams; cur; cur = cur->next) {
GstRMDemuxStream *stream = cur->data;
GST_DEBUG_OBJECT (rmdemux, "Pushing %s event on pad %s",
GST_EVENT_TYPE_NAME (event), GST_PAD_NAME (stream->pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
stream->last_ts = -1;
stream->next_ts = -1;
stream->last_seq = -1;
stream->next_seq = -1;
stream->last_flow = GST_FLOW_OK;
break;
default:
break;
}
gst_event_ref (event);
gst_pad_push_event (stream->pad, event);
}
gst_event_unref (event);
}
static void
gst_rmdemux_add_stream (GstRMDemux * rmdemux, GstRMDemuxStream * stream)
{
GstCaps *stream_caps = NULL;
const gchar *codec_tag = NULL;
const gchar *codec_name = NULL;
int version = 0;
if (stream->subtype == GST_RMDEMUX_STREAM_VIDEO) {
char *name = g_strdup_printf ("video_%02d", rmdemux->n_video_streams);
stream->pad =
gst_pad_new_from_static_template (&gst_rmdemux_videosrc_template, name);
g_free (name);
codec_tag = GST_TAG_VIDEO_CODEC;
switch (stream->fourcc) {
case GST_RM_VDO_RV10:
codec_name = "Real Video 1.0";
version = 1;
break;
case GST_RM_VDO_RV20:
codec_name = "Real Video 2.0";
version = 2;
break;
case GST_RM_VDO_RV30:
codec_name = "Real Video 3.0";
version = 3;
break;
case GST_RM_VDO_RV40:
codec_name = "Real Video 4.0";
version = 4;
break;
default:
stream_caps = gst_caps_new_simple ("video/x-unknown-fourcc",
"fourcc", GST_TYPE_FOURCC, stream->fourcc, NULL);
GST_WARNING_OBJECT (rmdemux,
"Unknown video FOURCC code \"%" GST_FOURCC_FORMAT "\" (%08x)",
GST_FOURCC_ARGS (stream->fourcc), stream->fourcc);
}
if (version) {
stream_caps =
gst_caps_new_simple ("video/x-pn-realvideo", "rmversion", G_TYPE_INT,
(int) version,
"format", G_TYPE_INT,
(int) stream->format,
"subformat", G_TYPE_INT, (int) stream->subformat, NULL);
}
if (stream_caps) {
gst_caps_set_simple (stream_caps,
"width", G_TYPE_INT, stream->width,
"height", G_TYPE_INT, stream->height,
"framerate", GST_TYPE_FRACTION, stream->framerate_numerator,
stream->framerate_denominator, NULL);
}
rmdemux->n_video_streams++;
} else if (stream->subtype == GST_RMDEMUX_STREAM_AUDIO) {
char *name = g_strdup_printf ("audio_%02d", rmdemux->n_audio_streams);
stream->pad =
gst_pad_new_from_static_template (&gst_rmdemux_audiosrc_template, name);
GST_LOG_OBJECT (rmdemux, "Created audio pad \"%s\"", name);
g_free (name);
codec_tag = GST_TAG_AUDIO_CODEC;
switch (stream->fourcc) {
/* Older RealAudio Codecs */
case GST_RM_AUD_14_4:
codec_name = "Real Audio 14.4kbps";
version = 1;
break;
case GST_RM_AUD_28_8:
codec_name = "Real Audio 28.8kbps";
version = 2;
break;
/* DolbyNet (Dolby AC3, low bitrate) */
case GST_RM_AUD_DNET:
codec_name = "AC-3 audio";
stream_caps =
gst_caps_new_simple ("audio/x-ac3", "rate", G_TYPE_INT,
(int) stream->rate, NULL);
stream->needs_descrambling = TRUE;
stream->subpackets_needed = 1;
stream->subpackets = NULL;
break;
/* MPEG-4 based */
case GST_RM_AUD_RAAC:
case GST_RM_AUD_RACP:
codec_name = "MPEG4 audio";
stream_caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT,
(int) 4, "framed", G_TYPE_BOOLEAN, TRUE, NULL);
if (stream->extra_data_size > 0) {
/* strip off an unknown byte in the extra data */
stream->extra_data_size--;
stream->extra_data++;
}
stream->needs_descrambling = TRUE;
stream->subpackets_needed = 1;
stream->subpackets = NULL;
break;
/* Sony ATRAC3 */
case GST_RM_AUD_ATRC:
codec_name = "Sony ATRAC3";
stream_caps = gst_caps_new_simple ("audio/x-vnd.sony.atrac3", NULL);
break;
/* RealAudio G2 audio */
case GST_RM_AUD_COOK:
codec_name = "Real Audio G2 (Cook)";
version = 8;
stream->needs_descrambling = TRUE;
stream->subpackets_needed = stream->height;
stream->subpackets = NULL;
break;
/* RALF is lossless */
case GST_RM_AUD_RALF:
/* FIXME: codec_name = */
GST_DEBUG_OBJECT (rmdemux, "RALF");
stream_caps = gst_caps_new_simple ("audio/x-ralf-mpeg4-generic", NULL);
break;
/* Sipro/ACELP.NET Voice Codec (MIME unknown) */
case GST_RM_AUD_SIPR:
/* FIXME: codec_name = */
stream_caps = gst_caps_new_simple ("audio/x-sipro", NULL);
break;
default:
stream_caps = gst_caps_new_simple ("video/x-unknown-fourcc",
"fourcc", GST_TYPE_FOURCC, stream->fourcc, NULL);
GST_WARNING_OBJECT (rmdemux,
"Unknown audio FOURCC code \"%" GST_FOURCC_FORMAT "\" (%08x)",
GST_FOURCC_ARGS (stream->fourcc), stream->fourcc);
break;
}
if (version) {
stream_caps =
gst_caps_new_simple ("audio/x-pn-realaudio", "raversion", G_TYPE_INT,
(int) version, NULL);
}
if (stream_caps) {
gst_caps_set_simple (stream_caps,
"flavor", G_TYPE_INT, (int) stream->flavor,
"rate", G_TYPE_INT, (int) stream->rate,
"channels", G_TYPE_INT, (int) stream->n_channels,
"width", G_TYPE_INT, (int) stream->sample_width,
"leaf_size", G_TYPE_INT, (int) stream->leaf_size,
"packet_size", G_TYPE_INT, (int) stream->packet_size,
"height", G_TYPE_INT, (int) stream->height, NULL);
}
rmdemux->n_audio_streams++;
} else {
GST_WARNING_OBJECT (rmdemux, "not adding stream of type %d, freeing it",
stream->subtype);
g_free (stream);
goto beach;
}
GST_PAD_ELEMENT_PRIVATE (stream->pad) = stream;
rmdemux->streams = g_slist_append (rmdemux->streams, stream);
GST_LOG_OBJECT (rmdemux, "n_streams is now %d",
g_slist_length (rmdemux->streams));
GST_LOG ("stream->pad = %p, stream_caps = %" GST_PTR_FORMAT, stream->pad,
stream_caps);
if (stream->pad && stream_caps) {
GST_LOG_OBJECT (rmdemux, "%d bytes of extra data for stream %s",
stream->extra_data_size, GST_PAD_NAME (stream->pad));
/* add codec_data if there is any */
if (stream->extra_data_size > 0) {
GstBuffer *buffer;
buffer = gst_buffer_new_and_alloc (stream->extra_data_size);
memcpy (GST_BUFFER_DATA (buffer), stream->extra_data,
stream->extra_data_size);
gst_caps_set_simple (stream_caps, "codec_data", GST_TYPE_BUFFER,
buffer, NULL);
gst_buffer_unref (buffer);
}
gst_pad_use_fixed_caps (stream->pad);
gst_pad_set_caps (stream->pad, stream_caps);
gst_pad_set_event_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_event));
gst_pad_set_query_type_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_query_types));
gst_pad_set_query_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_query));
GST_DEBUG_OBJECT (rmdemux, "adding pad %s with caps %" GST_PTR_FORMAT
", stream_id=%d", GST_PAD_NAME (stream->pad), stream_caps, stream->id);
gst_pad_set_active (stream->pad, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (rmdemux), stream->pad);
/* save for later, we must send the tags after the newsegment event */
if (codec_name != NULL && codec_tag != NULL) {
stream->pending_tags = gst_tag_list_new ();
gst_tag_list_add (stream->pending_tags, GST_TAG_MERGE_KEEP,
codec_tag, codec_name, NULL);
}
}
beach:
if (stream_caps)
gst_caps_unref (stream_caps);
}
static int
re_skip_pascal_string (const guint8 * ptr)
{
int length;
length = ptr[0];
return length + 1;
}
static void
gst_rmdemux_parse__rmf (GstRMDemux * rmdemux, const guint8 * data, int length)
{
GST_LOG_OBJECT (rmdemux, "file_version: %d", RMDEMUX_GUINT32_GET (data));
GST_LOG_OBJECT (rmdemux, "num_headers: %d", RMDEMUX_GUINT32_GET (data + 4));
}
static void
gst_rmdemux_parse_prop (GstRMDemux * rmdemux, const guint8 * data, int length)
{
GST_LOG_OBJECT (rmdemux, "max bitrate: %d", RMDEMUX_GUINT32_GET (data));
GST_LOG_OBJECT (rmdemux, "avg bitrate: %d", RMDEMUX_GUINT32_GET (data + 4));
GST_LOG_OBJECT (rmdemux, "max packet size: %d",
RMDEMUX_GUINT32_GET (data + 8));
rmdemux->avg_packet_size = RMDEMUX_GUINT32_GET (data + 12);
GST_LOG_OBJECT (rmdemux, "avg packet size: %d", rmdemux->avg_packet_size);
rmdemux->num_packets = RMDEMUX_GUINT32_GET (data + 16);
GST_LOG_OBJECT (rmdemux, "number of packets: %d", rmdemux->num_packets);
GST_LOG_OBJECT (rmdemux, "duration: %d", RMDEMUX_GUINT32_GET (data + 20));
rmdemux->duration = RMDEMUX_GUINT32_GET (data + 20) * GST_MSECOND;
GST_LOG_OBJECT (rmdemux, "preroll: %d", RMDEMUX_GUINT32_GET (data + 24));
rmdemux->index_offset = RMDEMUX_GUINT32_GET (data + 28);
GST_LOG_OBJECT (rmdemux, "offset of INDX section: 0x%08x",
rmdemux->index_offset);
rmdemux->data_offset = RMDEMUX_GUINT32_GET (data + 32);
GST_LOG_OBJECT (rmdemux, "offset of DATA section: 0x%08x",
rmdemux->data_offset);
GST_LOG_OBJECT (rmdemux, "n streams: %d", RMDEMUX_GUINT16_GET (data + 36));
GST_LOG_OBJECT (rmdemux, "flags: 0x%04x", RMDEMUX_GUINT16_GET (data + 38));
}
static void
gst_rmdemux_parse_mdpr (GstRMDemux * rmdemux, const guint8 * data, int length)
{
GstRMDemuxStream *stream;
char *stream1_type_string;
char *stream2_type_string;
guint str_len = 0;
int stream_type;
int offset;
stream = g_new0 (GstRMDemuxStream, 1);
stream->id = RMDEMUX_GUINT16_GET (data);
stream->index = NULL;
stream->seek_offset = 0;
stream->last_ts = -1;
stream->next_ts = -1;
stream->last_flow = GST_FLOW_OK;
stream->discont = TRUE;
stream->adapter = gst_adapter_new ();
GST_LOG_OBJECT (rmdemux, "stream_number=%d", stream->id);
offset = 30;
stream_type = GST_RMDEMUX_STREAM_UNKNOWN;
stream1_type_string = gst_rm_utils_read_string8 (data + offset,
length - offset, &str_len);
offset += str_len;
stream2_type_string = gst_rm_utils_read_string8 (data + offset,
length - offset, &str_len);
offset += str_len;
/* stream1_type_string for audio and video stream is a "put_whatever_you_want" field :
* observed values :
* - "[The ]Video/Audio Stream" (File produced by an official Real encoder)
* - "RealVideoPremierePlugIn-VIDEO/AUDIO" (File produced by Abobe Premiere)
*
* so, we should not rely on it to know which stream type it is
*/
GST_LOG_OBJECT (rmdemux, "stream type: %s", stream1_type_string);
GST_LOG_OBJECT (rmdemux, "MIME type=%s", stream2_type_string);
if (strcmp (stream2_type_string, "video/x-pn-realvideo") == 0) {
stream_type = GST_RMDEMUX_STREAM_VIDEO;
} else if (strcmp (stream2_type_string,
"video/x-pn-multirate-realvideo") == 0) {
stream_type = GST_RMDEMUX_STREAM_VIDEO;
} else if (strcmp (stream2_type_string, "audio/x-pn-realaudio") == 0) {
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream2_type_string,
"audio/x-pn-multirate-realaudio") == 0) {
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream2_type_string,
"audio/x-pn-multirate-realaudio-live") == 0) {
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream2_type_string, "audio/x-ralf-mpeg4-generic") == 0) {
/* Another audio type found in the real testsuite */
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream1_type_string, "") == 0 &&
strcmp (stream2_type_string, "logical-fileinfo") == 0) {
stream_type = GST_RMDEMUX_STREAM_FILEINFO;
} else {
stream_type = GST_RMDEMUX_STREAM_UNKNOWN;
GST_WARNING_OBJECT (rmdemux, "unknown stream type \"%s\",\"%s\"",
stream1_type_string, stream2_type_string);
}
g_free (stream1_type_string);
g_free (stream2_type_string);
offset += 4;
stream->subtype = stream_type;
switch (stream_type) {
case GST_RMDEMUX_STREAM_VIDEO:
/* RV10/RV20/RV30/RV40 => video/x-pn-realvideo, version=1,2,3,4 */
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 8);
stream->width = RMDEMUX_GUINT16_GET (data + offset + 12);
stream->height = RMDEMUX_GUINT16_GET (data + offset + 14);
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 16);
stream->subformat = RMDEMUX_GUINT32_GET (data + offset + 26);
stream->format = RMDEMUX_GUINT32_GET (data + offset + 30);
stream->extra_data_size = length - (offset + 26);
stream->extra_data = (guint8 *) data + offset + 26;
/* Natural way to represent framerates here requires unsigned 32 bit
* numerator, which we don't have. For the nasty case, approximate...
*/
{
guint32 numerator = RMDEMUX_GUINT16_GET (data + offset + 22) * 65536 +
RMDEMUX_GUINT16_GET (data + offset + 24);
if (numerator > G_MAXINT) {
stream->framerate_numerator = (gint) (numerator >> 1);
stream->framerate_denominator = 32768;
} else {
stream->framerate_numerator = (gint) numerator;
stream->framerate_denominator = 65536;
}
}
GST_DEBUG_OBJECT (rmdemux,
"Video stream with fourcc=%" GST_FOURCC_FORMAT
" width=%d height=%d rate=%d framerate=%d/%d subformat=%x format=%x extra_data_size=%d",
GST_FOURCC_ARGS (stream->fourcc), stream->width, stream->height,
stream->rate, stream->framerate_numerator,
stream->framerate_denominator, stream->subformat, stream->format,
stream->extra_data_size);
break;
case GST_RMDEMUX_STREAM_AUDIO:{
stream->version = RMDEMUX_GUINT16_GET (data + offset + 4);
GST_INFO ("stream version = %u", stream->version);
switch (stream->version) {
case 3:
stream->fourcc = GST_RM_AUD_14_4;
stream->packet_size = 20;
stream->rate = 8000;
stream->n_channels = 1;
stream->sample_width = 16;
stream->flavor = 1;
stream->leaf_size = 0;
stream->height = 0;
break;
case 4:
stream->flavor = RMDEMUX_GUINT16_GET (data + offset + 22);
stream->packet_size = RMDEMUX_GUINT32_GET (data + offset + 24);
/* stream->frame_size = RMDEMUX_GUINT32_GET (data + offset + 42); */
stream->leaf_size = RMDEMUX_GUINT16_GET (data + offset + 44);
stream->height = RMDEMUX_GUINT16_GET (data + offset + 40);
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 48);
stream->sample_width = RMDEMUX_GUINT16_GET (data + offset + 52);
stream->n_channels = RMDEMUX_GUINT16_GET (data + offset + 54);
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 62);
stream->extra_data_size = RMDEMUX_GUINT32_GET (data + offset + 69);
GST_DEBUG_OBJECT (rmdemux, "%u bytes of extra codec data",
stream->extra_data_size);
if (length - (offset + 73) >= stream->extra_data_size) {
stream->extra_data = (guint8 *) data + offset + 73;
} else {
GST_WARNING_OBJECT (rmdemux, "codec data runs beyond MDPR chunk");
stream->extra_data_size = 0;
}
break;
case 5:
stream->flavor = RMDEMUX_GUINT16_GET (data + offset + 22);
stream->packet_size = RMDEMUX_GUINT32_GET (data + offset + 24);
/* stream->frame_size = RMDEMUX_GUINT32_GET (data + offset + 42); */
stream->leaf_size = RMDEMUX_GUINT16_GET (data + offset + 44);
stream->height = RMDEMUX_GUINT16_GET (data + offset + 40);
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 54);
stream->sample_width = RMDEMUX_GUINT16_GET (data + offset + 58);
stream->n_channels = RMDEMUX_GUINT16_GET (data + offset + 60);
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 66);
stream->extra_data_size = RMDEMUX_GUINT32_GET (data + offset + 74);
GST_DEBUG_OBJECT (rmdemux, "%u bytes of extra codec data",
stream->extra_data_size);
if (length - (offset + 78) >= stream->extra_data_size) {
stream->extra_data = (guint8 *) data + offset + 78;
} else {
GST_WARNING_OBJECT (rmdemux, "codec data runs beyond MDPR chunk");
stream->extra_data_size = 0;
}
break;
default:{
GST_WARNING_OBJECT (rmdemux, "Unhandled audio stream version %d",
stream->version);
break;
}
}
/* 14_4, 28_8, cook, dnet, sipr, raac, racp, ralf, atrc */
GST_DEBUG_OBJECT (rmdemux,
"Audio stream with rate=%d sample_width=%d n_channels=%d",
stream->rate, stream->sample_width, stream->n_channels);
break;
}
case GST_RMDEMUX_STREAM_FILEINFO:
{
int element_nb;
/* Length of this section */
GST_DEBUG_OBJECT (rmdemux, "length2: 0x%08x",
RMDEMUX_GUINT32_GET (data + offset));
offset += 4;
/* Unknown : 00 00 00 00 */
offset += 4;
/* Number of variables that would follow (loop iterations) */
element_nb = RMDEMUX_GUINT32_GET (data + offset);
offset += 4;
while (element_nb) {
/* Category Id : 00 00 00 XX 00 00 */
offset += 6;
/* Variable Name */
offset += re_skip_pascal_string (data + offset);
/* Variable Value Type */
/* 00 00 00 00 00 => integer/boolean, preceded by length */
/* 00 00 00 02 00 => pascal string, preceded by length, no trailing \0 */
offset += 5;
/* Variable Value */
offset += re_skip_pascal_string (data + offset);
element_nb--;
}
}
break;
case GST_RMDEMUX_STREAM_UNKNOWN:
default:
break;
}
gst_rmdemux_add_stream (rmdemux, stream);
}
static guint
gst_rmdemux_parse_indx (GstRMDemux * rmdemux, const guint8 * data, int length)
{
int n;
int id;
n = RMDEMUX_GUINT32_GET (data);
id = RMDEMUX_GUINT16_GET (data + 4);
rmdemux->index_offset = RMDEMUX_GUINT32_GET (data + 6);
GST_DEBUG_OBJECT (rmdemux, "Number of indices=%d Stream ID=%d length=%d", n,
id, length);
/* Point to the next index_stream */
rmdemux->index_stream = gst_rmdemux_get_stream_by_id (rmdemux, id);
/* Return the length of the index */
return 14 * n;
}
static void
gst_rmdemux_parse_indx_data (GstRMDemux * rmdemux, const guint8 * data,
int length)
{
int i;
int n;
GstRMDemuxIndex *index;
/* The number of index records */
n = length / 14;
if (rmdemux->index_stream == NULL)
return;
/* don't parse the index a second time when operating pull-based and
* reaching the end of the file */
if (rmdemux->index_stream->index_length > 0) {
GST_DEBUG_OBJECT (rmdemux, "Already have an index for this stream");
return;
}
index = g_malloc (sizeof (GstRMDemuxIndex) * n);
rmdemux->index_stream->index = index;
rmdemux->index_stream->index_length = n;
for (i = 0; i < n; i++) {
index[i].timestamp = RMDEMUX_GUINT32_GET (data + 2) * GST_MSECOND;
index[i].offset = RMDEMUX_GUINT32_GET (data + 6);
GST_DEBUG_OBJECT (rmdemux, "Index found for timestamp=%f (at offset=%x)",
gst_guint64_to_gdouble (index[i].timestamp) / GST_SECOND,
index[i].offset);
data += 14;
}
}
static void
gst_rmdemux_parse_data (GstRMDemux * rmdemux, const guint8 * data, int length)
{
rmdemux->n_chunks = RMDEMUX_GUINT32_GET (data);
rmdemux->data_offset = RMDEMUX_GUINT32_GET (data + 4);
rmdemux->chunk_index = 0;
GST_DEBUG_OBJECT (rmdemux, "Data chunk found with %d packets "
"(next data at 0x%08x)", rmdemux->n_chunks, rmdemux->data_offset);
}
static void
gst_rmdemux_parse_cont (GstRMDemux * rmdemux, const guint8 * data, int length)
{
GstTagList *tags;
tags = gst_rm_utils_read_tags (data, length, gst_rm_utils_read_string16);
if (tags) {
gst_element_found_tags (GST_ELEMENT (rmdemux), tags);
}
}
static GstFlowReturn
gst_rmdemux_combine_flows (GstRMDemux * rmdemux, GstRMDemuxStream * stream,
GstFlowReturn ret)
{
GSList *cur;
/* store the value */
stream->last_flow = ret;
/* if it's success we can return the value right away */
if (GST_FLOW_IS_SUCCESS (ret))
goto done;
/* any other error that is not-linked can be returned right
* away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
for (cur = rmdemux->streams; cur; cur = cur->next) {
GstRMDemuxStream *ostream = cur->data;
ret = ostream->last_flow;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
done:
return ret;
}
static void
gst_rmdemux_stream_clear_cached_subpackets (GstRMDemux * rmdemux,
GstRMDemuxStream * stream)
{
if (stream->subpackets == NULL || stream->subpackets->len == 0)
return;
GST_DEBUG_OBJECT (rmdemux, "discarding %u previously collected subpackets",
stream->subpackets->len);
g_ptr_array_foreach (stream->subpackets, (GFunc) gst_mini_object_unref, NULL);
g_ptr_array_set_size (stream->subpackets, 0);
}
static GstFlowReturn
gst_rmdemux_descramble_cook_audio (GstRMDemux * rmdemux,
GstRMDemuxStream * stream)
{
GstFlowReturn ret;
GstBuffer *outbuf;
guint packet_size = stream->packet_size;
guint height = stream->subpackets->len;
guint leaf_size = stream->leaf_size;
guint p, x;
g_assert (stream->height == height);
GST_LOG ("packet_size = %u, leaf_size = %u, height= %u", packet_size,
leaf_size, height);
ret = gst_pad_alloc_buffer_and_set_caps (stream->pad,
GST_BUFFER_OFFSET_NONE, height * packet_size,
GST_PAD_CAPS (stream->pad), &outbuf);
if (ret != GST_FLOW_OK)
goto done;
for (p = 0; p < height; ++p) {
GstBuffer *b = g_ptr_array_index (stream->subpackets, p);
guint8 *b_data = GST_BUFFER_DATA (b);
if (p == 0)
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (b);
for (x = 0; x < packet_size / leaf_size; ++x) {
guint idx;
idx = height * x + ((height + 1) / 2) * (p % 2) + (p / 2);
/* GST_LOG ("%3u => %3u", (height * p) + x, idx); */
memcpy (GST_BUFFER_DATA (outbuf) + leaf_size * idx, b_data, leaf_size);
b_data += leaf_size;
}
}
/* some decoders, such as realaudiodec, need to be fed in packet units */
for (p = 0; p < height; ++p) {
GstBuffer *subbuf;
subbuf = gst_buffer_create_sub (outbuf, p * packet_size, packet_size);
GST_LOG_OBJECT (rmdemux, "pushing buffer timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (subbuf)));
if (stream->discont) {
GST_BUFFER_FLAG_SET (subbuf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
gst_buffer_set_caps (subbuf, GST_PAD_CAPS (stream->pad));
ret = gst_pad_push (stream->pad, subbuf);
if (ret != GST_FLOW_OK)
break;
}
gst_buffer_unref (outbuf);
done:
gst_rmdemux_stream_clear_cached_subpackets (rmdemux, stream);
return ret;
}
static GstFlowReturn
gst_rmdemux_descramble_dnet_audio (GstRMDemux * rmdemux,
GstRMDemuxStream * stream)
{
GstBuffer *buf;
buf = g_ptr_array_index (stream->subpackets, 0);
g_ptr_array_index (stream->subpackets, 0) = NULL;
g_ptr_array_set_size (stream->subpackets, 0);
buf = gst_rm_utils_descramble_dnet_buffer (buf);
if (stream->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
return gst_pad_push (stream->pad, buf);
}
static GstFlowReturn
gst_rmdemux_descramble_mp4a_audio (GstRMDemux * rmdemux,
GstRMDemuxStream * stream)
{
GstFlowReturn res;
GstBuffer *buf, *outbuf;
guint frames, index, i;
guint8 *data;
guint size;
GstClockTime timestamp;
res = GST_FLOW_OK;
buf = g_ptr_array_index (stream->subpackets, 0);
g_ptr_array_index (stream->subpackets, 0) = NULL;
g_ptr_array_set_size (stream->subpackets, 0);
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
timestamp = GST_BUFFER_TIMESTAMP (buf);
frames = (data[1] & 0xf0) >> 4;
index = 2 * frames + 2;
for (i = 0; i < frames; i++) {
guint len = (data[i * 2 + 2] << 8) | data[i * 2 + 3];
outbuf = gst_buffer_create_sub (buf, index, len);
if (i == 0)
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (stream->pad));
index += len;
if (stream->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
res = gst_pad_push (stream->pad, outbuf);
if (res != GST_FLOW_OK)
break;
}
gst_buffer_unref (buf);
return res;
}
static GstFlowReturn
gst_rmdemux_handle_scrambled_packet (GstRMDemux * rmdemux,
GstRMDemuxStream * stream, GstBuffer * buf, gboolean keyframe)
{
GstFlowReturn ret;
if (stream->subpackets == NULL)
stream->subpackets = g_ptr_array_sized_new (stream->subpackets_needed);
GST_LOG ("Got subpacket %u/%u, len=%u, key=%d", stream->subpackets->len + 1,
stream->subpackets_needed, GST_BUFFER_SIZE (buf), keyframe);
if (keyframe && stream->subpackets->len > 0) {
gst_rmdemux_stream_clear_cached_subpackets (rmdemux, stream);
}
g_ptr_array_add (stream->subpackets, buf);
if (stream->subpackets->len < stream->subpackets_needed)
return GST_FLOW_OK;
g_assert (stream->subpackets->len >= 1);
switch (stream->fourcc) {
case GST_RM_AUD_DNET:
ret = gst_rmdemux_descramble_dnet_audio (rmdemux, stream);
break;
case GST_RM_AUD_COOK:
ret = gst_rmdemux_descramble_cook_audio (rmdemux, stream);
break;
case GST_RM_AUD_RAAC:
case GST_RM_AUD_RACP:
ret = gst_rmdemux_descramble_mp4a_audio (rmdemux, stream);
break;
default:
g_assert_not_reached ();
}
return ret;
}
static GstClockTime
gst_rmdemux_fix_timestamp (GstRMDemux * rmdemux, GstRMDemuxStream * stream,
guint8 * data, GstClockTime timestamp)
{
guint8 frame_type;
guint16 seq;
GstClockTime ts = timestamp;
if (timestamp == GST_CLOCK_TIME_NONE)
goto done;
/* only adjust when we have a stream with B frames */
if (stream->format < 0x20200002)
goto done;
/* Fix timestamp. */
switch (stream->fourcc) {
case GST_RM_VDO_RV10:
goto done;
case GST_RM_VDO_RV20:
{
/*
* Bit 1- 2: frame type
* Bit 3- 9: ?
* Bit 10-22: sequence number
* Bit 23-32: ?
*/
frame_type = (data[0] >> 6) & 0x03;
seq = ((data[1] & 0x7f) << 6) + ((data[2] & 0xfc) >> 2);
break;
}
case GST_RM_VDO_RV30:
{
/*
* Bit 1- 2: ?
* Bit 3: skip packet if 1
* Bit 4- 5: frame type
* Bit 6-12: ?
* Bit 13-25: sequence number
* Bit 26-32: ?
*/
frame_type = (data[0] >> 3) & 0x03;
seq = ((data[1] & 0x0f) << 9) + (data[2] << 1) + ((data[3] & 0x80) >> 7);
break;
}
case GST_RM_VDO_RV40:
{
/*
* Bit 1: skip packet if 1
* Bit 2- 3: frame type
* Bit 4-13: ?
* Bit 14-26: sequence number
* Bit 27-32: ?
*/
frame_type = (data[0] >> 5) & 0x03;
seq = ((data[1] & 0x07) << 10) + (data[2] << 2) + ((data[3] & 0xc0) >> 6);
break;
}
default:
goto unknown_version;
}
switch (frame_type) {
case 0:
case 1:
{
GST_LOG_OBJECT (rmdemux, "I frame %d", frame_type);
/* I frame */
if (stream->next_ts == -1)
stream->next_ts = timestamp;
else
timestamp = stream->next_ts;
stream->last_ts = stream->next_ts;
stream->next_ts = ts;
stream->last_seq = stream->next_seq;
stream->next_seq = seq;
break;
}
case 2:
{
GST_LOG_OBJECT (rmdemux, "P frame");
/* P frame */
timestamp = stream->last_ts = stream->next_ts;
if (seq < stream->next_seq)
stream->next_ts += (seq + 0x2000 - stream->next_seq) * GST_MSECOND;
else
stream->next_ts += (seq - stream->next_seq) * GST_MSECOND;
stream->last_seq = stream->next_seq;
stream->next_seq = seq;
break;
}
case 3:
{
GST_LOG_OBJECT (rmdemux, "B frame");
/* B frame */
if (seq < stream->last_seq) {
timestamp =
(seq + 0x2000 - stream->last_seq) * GST_MSECOND + stream->last_ts;
} else {
timestamp = (seq - stream->last_seq) * GST_MSECOND + stream->last_ts;
}
break;
}
default:
goto unknown_frame_type;
}
done:
GST_LOG_OBJECT (rmdemux,
"timestamp %" GST_TIME_FORMAT " -> %" GST_TIME_FORMAT, GST_TIME_ARGS (ts),
GST_TIME_ARGS (timestamp));
return timestamp;
/* Errors */
unknown_version:
{
GST_ELEMENT_ERROR (rmdemux, STREAM, DECODE,
("Unknown version: %i.", stream->version), (NULL));
return GST_FLOW_ERROR;
}
unknown_frame_type:
{
GST_ELEMENT_ERROR (rmdemux, STREAM, DECODE, ("Unknown frame type %d.",
frame_type), (NULL));
return GST_FLOW_ERROR;
}
}
#define PARSE_NUMBER(data, size, number, label) \
G_STMT_START { \
if (size < 2) \
goto label; \
number = GST_READ_UINT16_BE (data); \
if (!(number & 0xc000)) { \
if (size < 4) \
goto label; \
number = GST_READ_UINT32_BE (data); \
data += 4; \
size -= 4; \
} else { \
number &= 0x3fff; \
data += 2; \
size -= 2; \
} \
} G_STMT_END
static GstFlowReturn
gst_rmdemux_parse_video_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream,
GstBuffer * in, guint offset, guint16 version,
GstClockTime timestamp, gboolean key)
{
GstFlowReturn ret;
const guint8 *data, *base;
guint size;
base = GST_BUFFER_DATA (in);
data = base + offset;
size = GST_BUFFER_SIZE (in) - offset;
/* if size <= 2, we want this method to return the same GstFlowReturn as it
* was previously for that given stream. */
ret = stream->last_flow;
while (size > 2) {
guint8 pkg_header;
guint pkg_offset;
guint pkg_length;
guint pkg_subseq = 0, pkg_seqnum = G_MAXUINT;
guint fragment_size;
GstBuffer *fragment;
pkg_header = *data++;
size--;
/* packet header
* bit 7: 1=last block in block chain
* bit 6: 1=short header (only one block?)
*/
if ((pkg_header & 0xc0) == 0x40) {
/* skip unknown byte */
data++;
size--;
pkg_offset = 0;
pkg_length = size;
} else {
if ((pkg_header & 0x40) == 0) {
pkg_subseq = (*data++) & 0x7f;
size--;
} else {
pkg_subseq = 0;
}
/* length */
PARSE_NUMBER (data, size, pkg_length, not_enough_data);
/* offset */
PARSE_NUMBER (data, size, pkg_offset, not_enough_data);
/* seqnum */
if (size < 1)
goto not_enough_data;
pkg_seqnum = *data++;
size--;
}
GST_DEBUG_OBJECT (rmdemux,
"seq %d, subseq %d, offset %d, length %d, size %d, header %02x",
pkg_seqnum, pkg_subseq, pkg_offset, pkg_length, size, pkg_header);
/* calc size of fragment */
if ((pkg_header & 0xc0) == 0x80) {
fragment_size = pkg_offset;
} else {
if ((pkg_header & 0xc0) == 0)
fragment_size = size;
else
fragment_size = pkg_length;
}
GST_DEBUG_OBJECT (rmdemux, "fragment size %d", fragment_size);
/* get the fragment */
fragment = gst_buffer_create_sub (in, data - base, fragment_size);
if (pkg_subseq == 1) {
GST_DEBUG_OBJECT (rmdemux, "start new fragment");
gst_adapter_clear (stream->adapter);
stream->frag_current = 0;
stream->frag_count = 0;
stream->frag_length = pkg_length;
} else if (pkg_subseq == 0) {
GST_DEBUG_OBJECT (rmdemux, "non fragmented packet");
stream->frag_current = 0;
stream->frag_count = 0;
stream->frag_length = fragment_size;
}
/* put fragment in adapter */
gst_adapter_push (stream->adapter, fragment);
stream->frag_offset[stream->frag_count] = stream->frag_current;
stream->frag_current += fragment_size;
stream->frag_count++;
if (stream->frag_count > MAX_FRAGS)
goto too_many_fragments;
GST_DEBUG_OBJECT (rmdemux, "stored fragment in adapter %d/%d",
stream->frag_current, stream->frag_length);
/* flush fragment when complete */
if (stream->frag_current >= stream->frag_length) {
GstBuffer *out;
guint8 *outdata;
guint header_size;
gint i, avail;
/* calculate header size, which is:
* 1 byte for the number of fragments - 1
* for each fragment:
* 4 bytes 0x00000001 little endian
* 4 bytes fragment offset
*
* This is also the matroska header for realvideo, the decoder needs the
* fragment offsets, both in ffmpeg and real .so, so we just give it that
* in front of the data.
*/
header_size = 1 + (8 * (stream->frag_count));
GST_DEBUG_OBJECT (rmdemux,
"fragmented completed. count %d, header_size %u", stream->frag_count,
header_size);
avail = gst_adapter_available (stream->adapter);
out = gst_buffer_new_and_alloc (header_size + avail);
outdata = GST_BUFFER_DATA (out);
/* create header */
*outdata++ = stream->frag_count - 1;
for (i = 0; i < stream->frag_count; i++) {
GST_WRITE_UINT32_LE (outdata, 0x00000001);
outdata += 4;
GST_WRITE_UINT32_LE (outdata, stream->frag_offset[i]);
outdata += 4;
}
/* copy packet data after the header now */
gst_adapter_copy (stream->adapter, outdata, 0, avail);
gst_adapter_flush (stream->adapter, avail);
stream->frag_current = 0;
stream->frag_count = 0;
stream->frag_length = 0;
gst_buffer_set_caps (out, GST_PAD_CAPS (stream->pad));
if (timestamp != -1) {
if (rmdemux->first_ts != -1 && timestamp > rmdemux->first_ts)
timestamp -= rmdemux->first_ts;
else
timestamp = 0;
if (rmdemux->base_ts != -1)
timestamp += rmdemux->base_ts;
}
timestamp =
gst_rmdemux_fix_timestamp (rmdemux, stream, outdata, timestamp);
GST_BUFFER_TIMESTAMP (out) = timestamp;
GST_LOG_OBJECT (rmdemux, "pushing timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (stream->discont) {
GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
ret = gst_pad_push (stream->pad, out);
ret = gst_rmdemux_combine_flows (rmdemux, stream, ret);
if (ret != GST_FLOW_OK)
break;
timestamp = GST_CLOCK_TIME_NONE;
}
data += fragment_size;
size -= fragment_size;
}
GST_DEBUG_OBJECT (rmdemux, "%d bytes left", size);
gst_buffer_unref (in);
return ret;
/* ERRORS */
not_enough_data:
{
GST_ELEMENT_WARNING (rmdemux, STREAM, DECODE, ("Skipping bad packet."),
(NULL));
gst_buffer_unref (in);
return GST_FLOW_OK;
}
too_many_fragments:
{
GST_ELEMENT_ERROR (rmdemux, STREAM, DECODE,
("Got more fragments (%u) than can be handled (%u)",
stream->frag_count, MAX_FRAGS), (NULL));
gst_buffer_unref (in);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_rmdemux_parse_audio_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream,
GstBuffer * in, guint offset, guint16 version,
GstClockTime timestamp, gboolean key)
{
GstFlowReturn ret, cret;
GstBuffer *buffer;
const guint8 *data;
guint size;
data = GST_BUFFER_DATA (in) + offset;
size = GST_BUFFER_SIZE (in) - offset;
ret = gst_pad_alloc_buffer_and_set_caps (stream->pad,
GST_BUFFER_OFFSET_NONE, size, GST_PAD_CAPS (stream->pad), &buffer);
cret = gst_rmdemux_combine_flows (rmdemux, stream, ret);
if (ret != GST_FLOW_OK)
goto alloc_failed;
memcpy (GST_BUFFER_DATA (buffer), (guint8 *) data, size);
if (rmdemux->first_ts != -1 && timestamp > rmdemux->first_ts)
timestamp -= rmdemux->first_ts;
else
timestamp = 0;
if (rmdemux->base_ts != -1)
timestamp += rmdemux->base_ts;
GST_BUFFER_TIMESTAMP (buffer) = timestamp;
if (stream->needs_descrambling) {
GST_LOG_OBJECT (rmdemux, "descramble timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
ret = gst_rmdemux_handle_scrambled_packet (rmdemux, stream, buffer, key);
} else {
GST_LOG_OBJECT (rmdemux,
"Pushing buffer of size %d, timestamp %" GST_TIME_FORMAT "to pad %s",
GST_BUFFER_SIZE (buffer), GST_TIME_ARGS (timestamp),
GST_PAD_NAME (stream->pad));
if (stream->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
ret = gst_pad_push (stream->pad, buffer);
}
return ret;
/* ERRORS */
alloc_failed:
{
GST_DEBUG_OBJECT (rmdemux, "pad alloc returned %d", ret);
return cret;
}
}
static GstFlowReturn
gst_rmdemux_parse_packet (GstRMDemux * rmdemux, GstBuffer * in, guint16 version)
{
guint16 id;
GstRMDemuxStream *stream;
guint size;
GstFlowReturn cret, ret;
GstClockTime timestamp;
gboolean key;
guint8 *data, *base;
guint8 flags;
guint32 ts;
base = data = GST_BUFFER_DATA (in);
size = GST_BUFFER_SIZE (in);
/* stream number */
id = RMDEMUX_GUINT16_GET (data);
stream = gst_rmdemux_get_stream_by_id (rmdemux, id);
if (!stream || !stream->pad)
goto unknown_stream;
/* timestamp in Msec */
ts = RMDEMUX_GUINT32_GET (data + 2);
timestamp = ts * GST_MSECOND;
gst_segment_set_last_stop (&rmdemux->segment, GST_FORMAT_TIME, timestamp);
GST_LOG_OBJECT (rmdemux, "Parsing a packet for stream=%d, timestamp=%"
GST_TIME_FORMAT ", size %u, version=%d, ts=%u", id,
GST_TIME_ARGS (timestamp), size, version, ts);
if (rmdemux->first_ts == GST_CLOCK_TIME_NONE) {
GST_DEBUG_OBJECT (rmdemux, "First timestamp: %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
rmdemux->first_ts = timestamp;
}
/* skip stream_id and timestamp */
data += (2 + 4);
size -= (2 + 4);
/* skip other stuff */
if (version == 0) {
/* uint8 packet_group */
/* uint8 flags */
flags = GST_READ_UINT8 (data + 1);
data += 2;
size -= 2;
} else {
/* uint16 asm_rule */
/* uint8 asm_flags */
flags = GST_READ_UINT8 (data + 2);
data += 3;
size -= 3;
}
key = (flags & 0x02) != 0;
GST_DEBUG_OBJECT (rmdemux, "flags %d, Keyframe %d", flags, key);
if (rmdemux->need_newsegment) {
GstEvent *event;
event = gst_event_new_new_segment (FALSE, rmdemux->segment.rate,
rmdemux->segment.format, rmdemux->segment.start,
rmdemux->segment.stop, rmdemux->segment.time);
GST_DEBUG_OBJECT (rmdemux, "sending NEWSEGMENT event, segment.start= %"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment.start));
gst_rmdemux_send_event (rmdemux, event);
rmdemux->need_newsegment = FALSE;
}
if (stream->pending_tags != NULL) {
GST_LOG_OBJECT (stream->pad, "tags %" GST_PTR_FORMAT, stream->pending_tags);
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (rmdemux), stream->pad,
stream->pending_tags);
stream->pending_tags = NULL;
}
if ((rmdemux->offset + size) <= stream->seek_offset) {
GST_DEBUG_OBJECT (rmdemux,
"Stream %d is skipping: seek_offset=%d, offset=%d, size=%u",
stream->id, stream->seek_offset, rmdemux->offset, size);
cret = GST_FLOW_OK;
goto beach;
}
/* do special headers */
if (stream->subtype == GST_RMDEMUX_STREAM_VIDEO) {
ret =
gst_rmdemux_parse_video_packet (rmdemux, stream, in, data - base,
version, timestamp, key);
} else if (stream->subtype == GST_RMDEMUX_STREAM_AUDIO) {
ret =
gst_rmdemux_parse_audio_packet (rmdemux, stream, in, data - base,
version, timestamp, key);
} else
ret = GST_FLOW_OK;
cret = gst_rmdemux_combine_flows (rmdemux, stream, ret);
beach:
return cret;
/* ERRORS */
unknown_stream:
{
GST_WARNING_OBJECT (rmdemux, "No stream for stream id %d in parsing "
"data packet", id);
return GST_FLOW_OK;
}
}
static gboolean
gst_rmdemux_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rmdemux",
GST_RANK_PRIMARY, GST_TYPE_RMDEMUX) &&
gst_element_register (plugin, "rademux",
GST_RANK_SECONDARY, GST_TYPE_REAL_AUDIO_DEMUX);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_rmdemux_plugin_init (plugin))
return FALSE;
if (!gst_rdt_depay_plugin_init (plugin))
return FALSE;
if (!gst_rdt_manager_plugin_init (plugin))
return FALSE;
if (!gst_rtsp_real_plugin_init (plugin))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"realmedia",
"RealMedia demuxer and depayloader",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
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