mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 20:21:24 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/mxf/mxfdemux.c
Sebastian Dröge 083d8c7018 gst/mxf/: Add mxf_metadata_generic_sound_essence_descriptor_set_caps() to set rate and channels and use this for all ... 
Original commit message from CVS:
* gst/mxf/mxfaes-bwf.c: (mxf_bwf_create_caps),
(mxf_aes3_create_caps):
* gst/mxf/mxfalaw.c: (mxf_alaw_create_caps):
* gst/mxf/mxfd10.c: (mxf_d10_create_caps):
* gst/mxf/mxfdemux.c:
* gst/mxf/mxfmetadata.c: (mxf_metadata_source_package_resolve),
(mxf_metadata_generic_picture_essence_descriptor_set_caps),
(mxf_metadata_generic_sound_essence_descriptor_set_caps):
* gst/mxf/mxfmetadata.h:
* gst/mxf/mxfmpeg.c: (mxf_mpeg_es_create_caps):
Add mxf_metadata_generic_sound_essence_descriptor_set_caps() to
set rate and channels and use this for all sound essence.
Give some debug output when setting picture essence caps with
invalid descriptor values.
Fix height calculation from the frame layout a bit more and
add a TODO to check if it's really correct now or if it needs
more fixing (especially, does the framerate need adjustments?).
2008-12-19 10:06:24 +00:00

2114 lines
59 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
/**
* SECTION:element-mxfdemux
*
* mxfdemux demuxes an MXF file into the different contained streams.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v filesrc location=/path/to/mxf ! mxfdemux ! audioconvert ! autoaudiosink
* ]| This pipeline demuxes an MXF file and outputs one of the contained raw audio streams.
* </refsect2>
*/
/* TODO:
* - Implement support for DMS-1 and descriptive metadata tracks
* - Differentiate UL and UUIDs, the former can define an object system
* (i.e. mxf_ul_is_a() and friends could be implemented), see SMPTE S336M.
* The latter are just 16 byte unique identifiers
* - Check everything for correctness vs. SMPTE S336M, some things can probably
* be generalized/simplified
* - Correctly timestamp essence streams and start/stop at the correct positions.
* Also switch between different structural components after one has ended.
* - Seeking support: IndexTableSegments and skip-to-position seeks, needs correct
* timestamp calculation, etc.
* - Handle timecode tracks correctly (where is this documented?)
* - Handle Generic container system items
* - Force synchronization of tracks. Packets that have the timestamp are not required
* to be stored at the same position in the essence stream, especially if tracks
* with different source packages (body sid) are used.
* - Implement correct support for clip-wrapped essence elements.
* - Add a "tracks" property to select the tracks that should be used from the
* selected package.
* - Post structural metadata and descriptive metadata trees as a message on the bus
* and send them downstream as event.
* - Multichannel audio needs channel layouts, define them (SMPTE S320M?).
* - Correctly handle the different rectangles and aspect-ratio for video
* - Add support for non-standard MXF used by Avid (bug #561922).
* - Fix frame layout stuff, i.e. interlaced/progressive
*
* - Implement SMPTE D11 essence and the digital cinema/MXF specs
*
* - Implement a muxer ;-)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mxfdemux.h"
#include "mxfparse.h"
#include "mxfmetadata.h"
#include <string.h>
static GstStaticPadTemplate mxf_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/mxf")
);
static GstStaticPadTemplate mxf_src_template =
GST_STATIC_PAD_TEMPLATE ("track_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (mxfdemux_debug);
#define GST_CAT_DEFAULT mxfdemux_debug
#define GST_TYPE_MXF_DEMUX_PAD (gst_mxf_demux_pad_get_type())
#define GST_MXF_DEMUX_PAD(pad) (G_TYPE_CHECK_INSTANCE_CAST((pad),GST_TYPE_MXF_DEMUX_PAD,GstMXFDemuxPad))
#define GST_MXF_DEMUX_PAD_CAST(pad) ((GstMXFDemuxPad *) pad)
#define GST_IS_MXF_DEMUX_PAD(pad) (G_TYPE_CHECK_INSTANCE_TYPE((pad),GST_TYPE_MXF_DEMUX_PAD))
typedef struct
{
GstPad parent;
guint32 track_id;
gboolean need_segment;
GstFlowReturn last_flow;
guint64 essence_element_count;
gpointer mapping_data;
const MXFEssenceElementHandler *handler;
MXFEssenceElementHandleFunc handle_func;
GstTagList *tags;
guint current_material_component;
MXFMetadataGenericPackage *material_package;
MXFMetadataTimelineTrack *material_track;
MXFMetadataStructuralComponent *component;
MXFMetadataSourcePackage *source_package;
MXFMetadataTimelineTrack *source_track;
GstCaps *caps;
} GstMXFDemuxPad;
typedef struct
{
GstPadClass parent;
} GstMXFDemuxPadClass;
G_DEFINE_TYPE (GstMXFDemuxPad, gst_mxf_demux_pad, GST_TYPE_PAD);
static void
gst_mxf_demux_pad_finalize (GObject * object)
{
GstMXFDemuxPad *pad = GST_MXF_DEMUX_PAD (object);
gst_caps_replace (&pad->caps, NULL);
g_free (pad->mapping_data);
pad->mapping_data = NULL;
if (pad->tags) {
gst_tag_list_free (pad->tags);
pad->tags = NULL;
}
G_OBJECT_CLASS (gst_mxf_demux_pad_parent_class)->finalize (object);
}
static void
gst_mxf_demux_pad_class_init (GstMXFDemuxPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_mxf_demux_pad_finalize;
}
static void
gst_mxf_demux_pad_init (GstMXFDemuxPad * pad)
{
pad->last_flow = GST_FLOW_OK;
}
enum
{
PROP_0,
PROP_PACKAGE
};
static gboolean gst_mxf_demux_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_mxf_demux_src_event (GstPad * pad, GstEvent * event);
static const GstQueryType *gst_mxf_demux_src_query_type (GstPad * pad);
static gboolean gst_mxf_demux_src_query (GstPad * pad, GstQuery * query);
GST_BOILERPLATE (GstMXFDemux, gst_mxf_demux, GstElement, GST_TYPE_ELEMENT);
static void
gst_mxf_demux_flush (GstMXFDemux * demux, gboolean discont)
{
GST_DEBUG_OBJECT (demux, "flushing queued data in the MXF demuxer");
gst_adapter_clear (demux->adapter);
demux->flushing = FALSE;
/* Only in push mode */
if (!demux->random_access) {
/* We reset the offset and will get one from first push */
demux->offset = 0;
}
}
static void
gst_mxf_demux_remove_pad (GstMXFDemuxPad * pad, GstMXFDemux * demux)
{
gst_element_remove_pad (GST_ELEMENT (demux), GST_PAD (pad));
}
static void
gst_mxf_demux_remove_pads (GstMXFDemux * demux)
{
if (demux->src) {
g_ptr_array_foreach (demux->src, (GFunc) gst_mxf_demux_remove_pad, demux);
g_ptr_array_foreach (demux->src, (GFunc) gst_object_unref, NULL);
g_ptr_array_free (demux->src, TRUE);
demux->src = NULL;
}
}
static void
gst_mxf_demux_reset_mxf_state (GstMXFDemux * demux)
{
GST_DEBUG_OBJECT (demux, "Resetting MXF state");
mxf_partition_pack_reset (&demux->partition);
mxf_primer_pack_reset (&demux->primer);
}
static void
gst_mxf_demux_reset_metadata (GstMXFDemux * demux)
{
guint i;
GST_DEBUG_OBJECT (demux, "Resetting metadata");
demux->update_metadata = TRUE;
demux->metadata_resolved = FALSE;
demux->current_package = NULL;
if (demux->src) {
for (i = 0; i < demux->src->len; i++) {
GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i);
pad->handler = NULL;
pad->handle_func = NULL;
pad->material_track = NULL;
pad->material_package = NULL;
pad->component = NULL;
pad->source_track = NULL;
pad->source_package = NULL;
}
}
demux->preface = NULL;
if (demux->metadata) {
guint i;
for (i = 0; i < demux->metadata->len; i++) {
GstMiniObject *o = g_ptr_array_index (demux->metadata, i);
if (o)
gst_mini_object_unref (o);
}
g_ptr_array_free (demux->metadata, TRUE);
demux->metadata = NULL;
}
}
static void
gst_mxf_demux_reset (GstMXFDemux * demux)
{
GST_DEBUG_OBJECT (demux, "cleaning up MXF demuxer");
demux->flushing = FALSE;
demux->header_partition_pack_offset = 0;
demux->footer_partition_pack_offset = 0;
demux->offset = 0;
demux->pull_footer_metadata = TRUE;
demux->run_in = -1;
memset (&demux->current_package_uid, 0, sizeof (MXFUMID));
if (demux->new_seg_event) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
if (demux->close_seg_event) {
gst_event_unref (demux->close_seg_event);
demux->close_seg_event = NULL;
}
gst_adapter_clear (demux->adapter);
gst_mxf_demux_remove_pads (demux);
if (demux->partition_index) {
g_array_free (demux->partition_index, TRUE);
demux->partition_index = NULL;
}
if (demux->index_table) {
guint i;
for (i = 0; i < demux->index_table->len; i++)
mxf_index_table_segment_reset (&g_array_index (demux->index_table,
MXFIndexTableSegment, i));
g_array_free (demux->index_table, TRUE);
demux->index_table = NULL;
}
gst_mxf_demux_reset_mxf_state (demux);
gst_mxf_demux_reset_metadata (demux);
}
static GstFlowReturn
gst_mxf_demux_combine_flows (GstMXFDemux * demux,
GstMXFDemuxPad * pad, GstFlowReturn ret)
{
guint i;
/* store the value */
pad->last_flow = ret;
/* any other error that is not-linked can be returned right away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
g_assert (demux->src->len != 0);
for (i = 0; i < demux->src->len; i++) {
GstMXFDemuxPad *opad = g_ptr_array_index (demux->src, i);
if (opad == NULL)
continue;
ret = opad->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:
GST_LOG_OBJECT (demux, "combined return %s", gst_flow_get_name (ret));
return ret;
}
static GstFlowReturn
gst_mxf_demux_pull_range (GstMXFDemux * demux, guint64 offset,
guint size, GstBuffer ** buffer)
{
GstFlowReturn ret;
ret = gst_pad_pull_range (demux->sinkpad, offset, size, buffer);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
GST_WARNING_OBJECT (demux,
"failed when pulling %u bytes from offset %" G_GUINT64_FORMAT ": %s",
size, offset, gst_flow_get_name (ret));
*buffer = NULL;
return ret;
}
if (G_UNLIKELY (*buffer && GST_BUFFER_SIZE (*buffer) != size)) {
GST_WARNING_OBJECT (demux,
"partial pull got %u when expecting %u from offset %" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (*buffer), size, offset);
gst_buffer_unref (*buffer);
ret = GST_FLOW_UNEXPECTED;
*buffer = NULL;
return ret;
}
return ret;
}
static gboolean
gst_mxf_demux_push_src_event (GstMXFDemux * demux, GstEvent * event)
{
gboolean ret = TRUE;
guint i;
GST_DEBUG_OBJECT (demux, "Pushing '%s' event downstream",
GST_EVENT_TYPE_NAME (event));
if (!demux->src)
return ret;
for (i = 0; i < demux->src->len; i++) {
GstPad *pad = GST_PAD (g_ptr_array_index (demux->src, i));
ret |= gst_pad_push_event (pad, gst_event_ref (event));
}
gst_event_unref (event);
return ret;
}
static GstFlowReturn
gst_mxf_demux_handle_partition_pack (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
if (demux->partition.valid) {
mxf_partition_pack_reset (&demux->partition);
mxf_primer_pack_reset (&demux->primer);
}
GST_DEBUG_OBJECT (demux,
"Handling partition pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (!mxf_partition_pack_parse (key, &demux->partition,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
GST_ERROR_OBJECT (demux, "Parsing partition pack failed");
return GST_FLOW_ERROR;
}
if (demux->partition.type == MXF_PARTITION_PACK_HEADER)
demux->footer_partition_pack_offset = demux->partition.footer_partition;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_primer_pack (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
GST_DEBUG_OBJECT (demux,
"Handling primer pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (G_UNLIKELY (!demux->partition.valid)) {
GST_ERROR_OBJECT (demux, "Primer pack before partition pack");
return GST_FLOW_ERROR;
}
if (G_UNLIKELY (demux->primer.valid)) {
GST_ERROR_OBJECT (demux, "Primer pack already exists");
return GST_FLOW_OK;
}
if (!mxf_primer_pack_parse (key, &demux->primer,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
GST_ERROR_OBJECT (demux, "Parsing primer pack failed");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_header_metadata_resolve_references (GstMXFDemux * demux)
{
guint i;
GstFlowReturn ret = GST_FLOW_OK;
GST_DEBUG_OBJECT (demux, "Resolve metadata references");
demux->update_metadata = FALSE;
if (!demux->metadata) {
GST_ERROR_OBJECT (demux, "No metadata yet");
return GST_FLOW_ERROR;
}
/* Append NULL terminator */
g_ptr_array_add (demux->metadata, NULL);
for (i = 0; i < demux->metadata->len - 1; i++) {
MXFMetadataBase *m =
MXF_METADATA_BASE (g_ptr_array_index (demux->metadata, i));
gboolean resolved;
resolved =
mxf_metadata_base_resolve (m,
(MXFMetadataBase **) demux->metadata->pdata);
/* Resolving can fail for anything but the preface, as the preface
* will resolve everything required */
if (!resolved && MXF_IS_METADATA_PREFACE (m)) {
ret = GST_FLOW_ERROR;
goto error;
}
}
demux->metadata_resolved = TRUE;
return ret;
error:
demux->metadata_resolved = FALSE;
return ret;
}
static MXFMetadataGenericPackage *
gst_mxf_demux_find_package (GstMXFDemux * demux, const MXFUMID * umid)
{
MXFMetadataGenericPackage *ret = NULL;
guint i;
if (demux->preface->content_storage
&& demux->preface->content_storage->packages) {
for (i = 0; i < demux->preface->content_storage->n_packages; i++) {
MXFMetadataGenericPackage *p =
demux->preface->content_storage->packages[i];
if (!p)
continue;
if (mxf_umid_is_equal (&p->package_uid, umid)) {
ret = p;
break;
}
}
}
return ret;
}
static MXFMetadataGenericPackage *
gst_mxf_demux_choose_package (GstMXFDemux * demux)
{
MXFMetadataGenericPackage *ret = NULL;
guint i;
if (demux->requested_package_string) {
MXFUMID umid;
if (!mxf_umid_from_string (demux->requested_package_string, &umid)) {
GST_ERROR_OBJECT (demux, "Invalid requested package");
} else {
if (memcmp (&umid, &demux->current_package_uid, 32) != 0) {
gst_mxf_demux_remove_pads (demux);
memcpy (&demux->current_package_uid, &umid, 32);
}
}
g_free (demux->requested_package_string);
demux->requested_package_string = NULL;
}
if (!mxf_umid_is_zero (&demux->current_package_uid))
ret = gst_mxf_demux_find_package (demux, &demux->current_package_uid);
if (ret && (MXF_IS_METADATA_MATERIAL_PACKAGE (ret)
|| (MXF_IS_METADATA_SOURCE_PACKAGE (ret)
&& MXF_METADATA_SOURCE_PACKAGE (ret)->top_level)))
return ret;
else if (ret)
GST_WARNING_OBJECT (demux,
"Current package is not a material package or top-level source package, choosing the first best");
else if (!mxf_umid_is_zero (&demux->current_package_uid))
GST_WARNING_OBJECT (demux,
"Current package not found, choosing the first best");
if (demux->preface->primary_package)
ret = demux->preface->primary_package;
if (ret && (MXF_IS_METADATA_MATERIAL_PACKAGE (ret)
|| (MXF_IS_METADATA_SOURCE_PACKAGE (ret)
&& MXF_METADATA_SOURCE_PACKAGE (ret)->top_level)))
return ret;
for (i = 0; i < demux->preface->content_storage->n_packages; i++) {
if (demux->preface->content_storage->packages[i] &&
MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->
content_storage->packages[i])) {
ret =
MXF_METADATA_GENERIC_PACKAGE (demux->preface->
content_storage->packages[i]);
break;
}
}
if (!ret) {
GST_ERROR_OBJECT (demux, "No material package");
return NULL;
}
memcpy (&demux->current_package_uid, &ret->package_uid, 32);
if (!ret)
GST_ERROR_OBJECT (demux, "No suitable package found");
return ret;
}
static GstFlowReturn
gst_mxf_demux_handle_header_metadata_update_streams (GstMXFDemux * demux)
{
MXFMetadataGenericPackage *current_package = NULL;
guint i, j, k;
gboolean first_run;
GST_DEBUG_OBJECT (demux, "Updating streams");
current_package = gst_mxf_demux_choose_package (demux);
if (!current_package) {
GST_ERROR_OBJECT (demux, "Unable to find current package");
return GST_FLOW_ERROR;
} else if (!current_package->tracks) {
GST_ERROR_OBJECT (demux, "Current package has no (resolved) tracks");
return GST_FLOW_ERROR;
} else if (!current_package->n_essence_tracks) {
GST_ERROR_OBJECT (demux, "Current package has no essence tracks");
return GST_FLOW_ERROR;
}
first_run = (demux->src == NULL);
demux->current_package = current_package;
for (i = 0; i < current_package->n_tracks; i++) {
MXFMetadataTimelineTrack *track = NULL;
MXFMetadataSequence *sequence;
MXFMetadataStructuralComponent *component = NULL;
MXFMetadataSourcePackage *source_package = NULL;
MXFMetadataTimelineTrack *source_track = NULL;
GstMXFDemuxPad *pad = NULL;
GstCaps *caps = NULL;
GST_DEBUG_OBJECT (demux, "Handling track %u", i);
if (!current_package->tracks[i]) {
GST_WARNING_OBJECT (demux, "Unresolved track");
continue;
}
if (!MXF_IS_METADATA_TIMELINE_TRACK (current_package->tracks[i])) {
GST_DEBUG_OBJECT (demux, "No timeline track");
continue;
}
track = MXF_METADATA_TIMELINE_TRACK (current_package->tracks[i]);
if (!track->parent.sequence) {
GST_WARNING_OBJECT (demux, "Track with no sequence");
continue;
}
sequence = track->parent.sequence;
if (MXF_IS_METADATA_SOURCE_PACKAGE (current_package)) {
source_package = MXF_METADATA_SOURCE_PACKAGE (current_package);
source_track = track;
}
/* TODO: handle multiple components, see SMPTE 377M page 37 */
if (sequence->structural_components && sequence->structural_components[0]) {
component = sequence->structural_components[0];
if (!source_package && MXF_IS_METADATA_SOURCE_CLIP (component)) {
MXFMetadataSourceClip *clip = MXF_METADATA_SOURCE_CLIP (component);
if (clip->source_package && clip->source_package->top_level &&
MXF_METADATA_GENERIC_PACKAGE (clip->source_package)->tracks) {
MXFMetadataGenericPackage *tmp_pkg =
MXF_METADATA_GENERIC_PACKAGE (clip->source_package);
source_package = clip->source_package;
for (k = 0; k < tmp_pkg->n_tracks; k++) {
MXFMetadataTrack *tmp = tmp_pkg->tracks[k];
if (tmp->track_id == clip->source_track_id) {
source_track = MXF_METADATA_TIMELINE_TRACK (tmp);
break;
}
}
}
}
}
if (track->parent.type && (track->parent.type & 0xf0) != 0x30) {
GST_DEBUG_OBJECT (demux, "No essence track");
continue;
}
if (!source_package || track->parent.type == MXF_METADATA_TRACK_UNKNOWN
|| !source_track || !component) {
GST_WARNING_OBJECT (demux,
"No source package or track type for track found");
continue;
}
if (!source_package->descriptors) {
GST_WARNING_OBJECT (demux, "Source package has no descriptors");
continue;
}
if (!source_track->parent.descriptor) {
GST_WARNING_OBJECT (demux, "No descriptor found for track");
continue;
}
if (demux->src && demux->src->len > 0) {
/* Find pad from track_id */
for (j = 0; j < demux->src->len; j++) {
GstMXFDemuxPad *tmp = g_ptr_array_index (demux->src, j);
if (tmp->track_id == track->parent.track_id) {
pad = tmp;
break;
}
}
}
if (!pad && first_run) {
GstPadTemplate *templ;
gchar *pad_name;
templ =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (demux),
"track_%u");
pad_name = g_strdup_printf ("track_%u", track->parent.track_id);
g_assert (templ != NULL);
/* Create pad */
pad = (GstMXFDemuxPad *) g_object_new (GST_TYPE_MXF_DEMUX_PAD,
"name", pad_name, "direction", GST_PAD_SRC, "template", templ, NULL);
pad->need_segment = TRUE;
g_free (pad_name);
}
if (!pad) {
GST_WARNING_OBJECT (demux,
"Not the first pad addition run, ignoring new track");
continue;
}
/* Update pad */
pad->track_id = track->parent.track_id;
pad->material_package = current_package;
pad->material_track = track;
pad->current_material_component = 0;
pad->component = component;
pad->source_package = source_package;
pad->source_track = source_track;
pad->handler = NULL;
g_free (pad->mapping_data);
pad->handle_func = NULL;
pad->mapping_data = NULL;
pad->handler = mxf_essence_element_handler_find (source_track);
if (!pad->handler) {
GST_WARNING_OBJECT (demux, "No essence element handler for track found");
gst_object_unref (pad);
continue;
}
caps =
pad->handler->create_caps (source_track, &pad->tags, &pad->handle_func,
&pad->mapping_data);
if (!caps) {
GST_WARNING_OBJECT (demux, "No caps created, ignoring stream");
gst_object_unref (pad);
continue;
}
GST_DEBUG_OBJECT (demux, "Created caps %" GST_PTR_FORMAT, caps);
if (pad->caps && !gst_caps_is_equal (pad->caps, caps)) {
gst_pad_set_caps (GST_PAD_CAST (pad), caps);
gst_caps_replace (&pad->caps, gst_caps_ref (caps));
} else if (!pad->caps) {
gst_pad_set_caps (GST_PAD_CAST (pad), caps);
pad->caps = gst_caps_ref (caps);
gst_pad_set_event_function (GST_PAD_CAST (pad),
GST_DEBUG_FUNCPTR (gst_mxf_demux_src_event));
gst_pad_set_query_type_function (GST_PAD_CAST (pad),
GST_DEBUG_FUNCPTR (gst_mxf_demux_src_query_type));
gst_pad_set_query_function (GST_PAD_CAST (pad),
GST_DEBUG_FUNCPTR (gst_mxf_demux_src_query));
gst_pad_use_fixed_caps (GST_PAD_CAST (pad));
gst_pad_set_active (GST_PAD_CAST (pad), TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (demux), gst_object_ref (pad));
if (!demux->src)
demux->src = g_ptr_array_new ();
g_ptr_array_add (demux->src, pad);
}
gst_caps_unref (caps);
}
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
guint16 type;
MXFMetadata *metadata = NULL;
GstFlowReturn ret = GST_FLOW_OK;
type = GST_READ_UINT16_BE (key->u + 13);
GST_DEBUG_OBJECT (demux,
"Handling metadata of size %u at offset %"
G_GUINT64_FORMAT " of type 0x%04x", GST_BUFFER_SIZE (buffer),
demux->offset, type);
if (G_UNLIKELY (!demux->partition.valid)) {
GST_ERROR_OBJECT (demux, "Partition pack doesn't exist");
return GST_FLOW_ERROR;
}
if (G_UNLIKELY (!demux->primer.valid)) {
GST_ERROR_OBJECT (demux, "Primer pack doesn't exists");
return GST_FLOW_ERROR;
}
metadata =
mxf_metadata_new (type, &demux->primer, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
if (metadata && !MXF_IS_METADATA_PREFACE (metadata)
&& !demux->update_metadata) {
GST_DEBUG_OBJECT (demux,
"Skipping parsing of metadata because it's older than what we have");
gst_mini_object_unref ((GstMiniObject *) metadata);
return GST_FLOW_OK;
}
if (!metadata) {
GST_ERROR_OBJECT (demux, "Parsing metadata failed");
return GST_FLOW_ERROR;
}
if (MXF_IS_METADATA_PREFACE (metadata)) {
MXFMetadataPreface *preface = MXF_METADATA_PREFACE (metadata);
if (!demux->preface
|| (!mxf_timestamp_is_unknown (&preface->last_modified_date)
&& mxf_timestamp_compare (&demux->preface->last_modified_date,
&preface->last_modified_date) < 0)) {
GST_DEBUG_OBJECT (demux,
"Timestamp of new preface is newer than old, updating metadata");
gst_mxf_demux_reset_metadata (demux);
demux->preface = preface;
} else {
GST_DEBUG_OBJECT (demux, "Preface is older than already parsed preface");
gst_mini_object_unref ((GstMiniObject *) metadata);
return GST_FLOW_OK;
}
}
if (!demux->metadata)
demux->metadata = g_ptr_array_new ();
g_ptr_array_add (demux->metadata, metadata);
return ret;
}
static GstFlowReturn
gst_mxf_demux_handle_descriptive_metadata (GstMXFDemux * demux,
const MXFUL * key, GstBuffer * buffer)
{
guint32 type;
guint8 scheme;
GstFlowReturn ret = GST_FLOW_OK;
scheme = GST_READ_UINT8 (key->u + 12);
type = GST_READ_UINT24_BE (key->u + 13);
GST_DEBUG_OBJECT (demux,
"Handling descriptive metadata of size %u at offset %"
G_GUINT64_FORMAT " with scheme 0x%02x and type 0x%06x",
GST_BUFFER_SIZE (buffer), demux->offset, scheme, type);
if (G_UNLIKELY (!demux->partition.valid)) {
GST_ERROR_OBJECT (demux, "Partition pack doesn't exist");
return GST_FLOW_ERROR;
}
if (G_UNLIKELY (!demux->primer.valid)) {
GST_ERROR_OBJECT (demux, "Primer pack doesn't exists");
return GST_FLOW_ERROR;
}
if (!demux->update_metadata) {
GST_DEBUG_OBJECT (demux,
"Skipping parsing of metadata because it's older than what we have");
return GST_FLOW_OK;
}
switch (type) {
default:
GST_WARNING_OBJECT (demux,
"Unknown or unhandled descriptive metadata of scheme 0x%02x and type 0x%06x",
scheme, type);
break;
}
return ret;
}
static GstFlowReturn
gst_mxf_demux_handle_generic_container_system_item (GstMXFDemux * demux,
const MXFUL * key, GstBuffer * buffer)
{
GST_DEBUG_OBJECT (demux,
"Handling generic container system item of size %u"
" at offset %" G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
/* TODO: parse this */
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
const MXFUL * key, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
guint32 track_number;
guint i, j;
GstMXFDemuxPad *pad = NULL;
GstBuffer *inbuf;
GstBuffer *outbuf = NULL;
GST_DEBUG_OBJECT (demux,
"Handling generic container essence element of size %u"
" at offset %" G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
GST_DEBUG_OBJECT (demux, " type = 0x%02x", key->u[12]);
GST_DEBUG_OBJECT (demux, " essence element count = 0x%02x", key->u[13]);
GST_DEBUG_OBJECT (demux, " essence element type = 0x%02x", key->u[14]);
GST_DEBUG_OBJECT (demux, " essence element number = 0x%02x", key->u[15]);
if (!demux->current_package) {
GST_ERROR_OBJECT (demux, "No package selected yet");
return GST_FLOW_ERROR;
}
if (!demux->src || demux->src->len == 0) {
GST_ERROR_OBJECT (demux, "No streams created yet");
return GST_FLOW_ERROR;
}
if (GST_BUFFER_SIZE (buffer) == 0) {
GST_DEBUG_OBJECT (demux, "Zero sized essence element, ignoring");
return GST_FLOW_OK;
}
track_number = GST_READ_UINT32_BE (&key->u[12]);
for (i = 0; i < demux->src->len; i++) {
GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i);
MXFMetadataContentStorage *content_storage =
demux->preface->content_storage;
if (p->source_track->parent.track_number == track_number ||
(p->source_track->parent.track_number == 0 &&
demux->src->len == 1 &&
demux->current_package->n_essence_tracks == 1)) {
if (content_storage->essence_container_data) {
for (j = 0; j < content_storage->n_essence_container_data; j++) {
MXFMetadataEssenceContainerData *edata =
content_storage->essence_container_data[j];
if (edata && p->source_package == edata->linked_package
&& demux->partition.body_sid == edata->body_sid) {
pad = p;
break;
}
}
} else {
pad = p;
}
if (pad)
break;
}
}
if (!pad) {
GST_WARNING_OBJECT (demux, "No corresponding pad found");
return GST_FLOW_OK;
}
if (pad->need_segment) {
gst_pad_push_event (GST_PAD_CAST (pad),
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, -1, 0));
pad->need_segment = FALSE;
}
if (pad->tags) {
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (demux),
GST_PAD_CAST (pad), pad->tags);
pad->tags = NULL;
}
/* Create subbuffer to be able to change metadata */
inbuf = gst_buffer_create_sub (buffer, 0, GST_BUFFER_SIZE (buffer));
GST_BUFFER_TIMESTAMP (inbuf) =
gst_util_uint64_scale (pad->essence_element_count +
pad->material_track->origin,
GST_SECOND * pad->material_track->edit_rate.d,
pad->material_track->edit_rate.n);
GST_BUFFER_DURATION (inbuf) =
gst_util_uint64_scale (GST_SECOND, pad->material_track->edit_rate.d,
pad->material_track->edit_rate.n);
GST_BUFFER_OFFSET (inbuf) = pad->essence_element_count;
GST_BUFFER_OFFSET_END (inbuf) = GST_BUFFER_OFFSET_NONE;
gst_buffer_set_caps (inbuf, pad->caps);
if (pad->handle_func) {
/* Takes ownership of inbuf */
ret =
pad->handle_func (key, inbuf, pad->caps,
pad->source_track, pad->component, pad->mapping_data, &outbuf);
inbuf = NULL;
} else {
outbuf = inbuf;
inbuf = NULL;
ret = GST_FLOW_OK;
}
pad->essence_element_count++;
if (ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (demux, "Failed to handle essence element");
if (outbuf) {
gst_buffer_unref (outbuf);
outbuf = NULL;
}
}
if (outbuf) {
/* TODO: handle timestamp gaps */
GST_DEBUG_OBJECT (demux,
"Pushing buffer of size %u for track %u: timestamp %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (outbuf),
pad->material_track->parent.track_id,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
ret = gst_pad_push (GST_PAD_CAST (pad), outbuf);
ret = gst_mxf_demux_combine_flows (demux, pad, ret);
} else {
GST_DEBUG_OBJECT (demux, "Dropping buffer for track %u",
pad->material_track->parent.track_id);
}
return ret;
}
static GstFlowReturn
gst_mxf_demux_handle_random_index_pack (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
GST_DEBUG_OBJECT (demux,
"Handling random index pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (demux->partition_index) {
GST_DEBUG_OBJECT (demux, "Already parsed random index pack");
return GST_FLOW_OK;
}
if (!mxf_random_index_pack_parse (key, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer), &demux->partition_index)) {
GST_ERROR_OBJECT (demux, "Parsing random index pack failed");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_index_table_segment (GstMXFDemux * demux,
const MXFUL * key, GstBuffer * buffer)
{
MXFIndexTableSegment segment;
memset (&segment, 0, sizeof (segment));
GST_DEBUG_OBJECT (demux,
"Handling index table segment of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (!demux->primer.valid) {
GST_WARNING_OBJECT (demux, "Invalid primer pack");
return GST_FLOW_OK;
}
if (!mxf_index_table_segment_parse (key, &segment, &demux->primer,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
GST_ERROR_OBJECT (demux, "Parsing index table segment failed");
return GST_FLOW_ERROR;
}
if (!demux->index_table)
demux->index_table =
g_array_new (FALSE, FALSE, sizeof (MXFIndexTableSegment));
g_array_append_val (demux->index_table, segment);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_pull_klv_packet (GstMXFDemux * demux, guint64 offset, MXFUL * key,
GstBuffer ** outbuf, guint * read)
{
GstBuffer *buffer = NULL;
const guint8 *data;
guint64 data_offset = 0;
guint64 length;
GstFlowReturn ret = GST_FLOW_OK;
memset (key, 0, sizeof (MXFUL));
/* Pull 16 byte key and first byte of BER encoded length */
if ((ret =
gst_mxf_demux_pull_range (demux, offset, 17, &buffer)) != GST_FLOW_OK)
goto beach;
data = GST_BUFFER_DATA (buffer);
memcpy (key, GST_BUFFER_DATA (buffer), 16);
/* Decode BER encoded packet length */
if ((data[16] & 0x80) == 0) {
length = data[16];
data_offset = 17;
} else {
guint slen = data[16] & 0x7f;
data_offset = 16 + 1 + slen;
gst_buffer_unref (buffer);
buffer = NULL;
/* Must be at most 8 according to SMPTE-379M 5.3.4 */
if (slen > 8) {
GST_ERROR_OBJECT (demux, "Invalid KLV packet length: %u", slen);
ret = GST_FLOW_ERROR;
goto beach;
}
/* Now pull the length of the packet */
if ((ret = gst_mxf_demux_pull_range (demux, offset + 17, slen,
&buffer)) != GST_FLOW_OK)
goto beach;
data = GST_BUFFER_DATA (buffer);
length = 0;
while (slen) {
length = (length << 8) | *data;
data++;
slen--;
}
}
gst_buffer_unref (buffer);
buffer = NULL;
/* GStreamer's buffer sizes are stored in a guint so we
* limit ourself to G_MAXUINT large buffers */
if (length > G_MAXUINT) {
GST_ERROR_OBJECT (demux,
"Unsupported KLV packet length: %" G_GUINT64_FORMAT, length);
ret = GST_FLOW_ERROR;
goto beach;
}
/* Pull the complete KLV packet */
if ((ret = gst_mxf_demux_pull_range (demux, offset + data_offset, length,
&buffer)) != GST_FLOW_OK)
goto beach;
*outbuf = buffer;
buffer = NULL;
if (read)
*read = data_offset + length;
beach:
if (buffer)
gst_buffer_unref (buffer);
return ret;
}
void
gst_mxf_demux_pull_random_index_pack (GstMXFDemux * demux)
{
GstBuffer *buffer;
GstFlowReturn ret;
gint64 filesize = -1;
GstFormat fmt = GST_FORMAT_BYTES;
guint32 pack_size;
guint64 old_offset = demux->offset;
MXFUL key;
if (!gst_pad_query_peer_duration (demux->sinkpad, &fmt, &filesize) ||
fmt != GST_FORMAT_BYTES || filesize == -1) {
GST_DEBUG_OBJECT (demux, "Can't query upstream size");
return;
}
g_assert (filesize > 4);
if ((ret =
gst_mxf_demux_pull_range (demux, filesize - 4, 4,
&buffer)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (demux, "Failed pulling last 4 bytes");
return;
}
pack_size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buffer));
gst_buffer_unref (buffer);
if (pack_size < 20) {
GST_DEBUG_OBJECT (demux, "Too small pack size (%u bytes)", pack_size);
return;
} else if (pack_size > filesize - 20) {
GST_DEBUG_OBJECT (demux, "Too large pack size (%u bytes)", pack_size);
return;
}
if ((ret =
gst_mxf_demux_pull_range (demux, filesize - pack_size, 16,
&buffer)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (demux, "Failed pulling random index pack key");
return;
}
memcpy (&key, GST_BUFFER_DATA (buffer), 16);
gst_buffer_unref (buffer);
if (!mxf_is_random_index_pack (&key)) {
GST_DEBUG_OBJECT (demux, "No random index pack");
return;
}
demux->offset = filesize - pack_size;
if ((ret =
gst_mxf_demux_pull_klv_packet (demux, filesize - pack_size, &key,
&buffer, NULL)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (demux, "Failed pulling random index pack");
return;
}
gst_mxf_demux_handle_random_index_pack (demux, &key, buffer);
gst_buffer_unref (buffer);
demux->offset = old_offset;
}
static void
gst_mxf_demux_parse_footer_metadata (GstMXFDemux * demux)
{
MXFPartitionPack partition;
MXFPrimerPack primer;
guint64 offset, old_offset = demux->offset;
MXFUL key;
GstBuffer *buffer = NULL;
guint read = 0;
GstFlowReturn ret = GST_FLOW_OK;
memcpy (&partition, &demux->partition, sizeof (MXFPartitionPack));
memcpy (&primer, &demux->primer, sizeof (MXFPrimerPack));
memset (&demux->partition, 0, sizeof (MXFPartitionPack));
memset (&demux->primer, 0, sizeof (MXFPrimerPack));
gst_mxf_demux_reset_metadata (demux);
offset =
demux->header_partition_pack_offset + demux->footer_partition_pack_offset;
next_try:
mxf_partition_pack_reset (&demux->partition);
mxf_primer_pack_reset (&demux->primer);
ret = gst_mxf_demux_pull_klv_packet (demux, offset, &key, &buffer, &read);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto out;
if (!mxf_is_partition_pack (&key))
goto out;
if (!mxf_partition_pack_parse (&key, &demux->partition,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer)))
goto out;
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
if (demux->partition.header_byte_count == 0) {
if (demux->partition.prev_partition == 0
|| demux->partition.this_partition == 0)
goto out;
offset =
demux->header_partition_pack_offset + demux->partition.this_partition -
demux->partition.prev_partition;
goto next_try;
}
while (TRUE) {
ret = gst_mxf_demux_pull_klv_packet (demux, offset, &key, &buffer, &read);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
offset =
demux->header_partition_pack_offset +
demux->partition.this_partition - demux->partition.prev_partition;
goto next_try;
}
if (mxf_is_fill (&key)) {
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
} else if (mxf_is_primer_pack (&key)) {
if (!mxf_primer_pack_parse (&key, &demux->primer,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
offset =
demux->header_partition_pack_offset +
demux->partition.this_partition - demux->partition.prev_partition;
goto next_try;
}
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
break;
} else {
gst_buffer_unref (buffer);
buffer = NULL;
offset =
demux->header_partition_pack_offset +
demux->partition.this_partition - demux->partition.prev_partition;
goto next_try;
}
}
/* parse metadata */
while (TRUE) {
ret = gst_mxf_demux_pull_klv_packet (demux, offset, &key, &buffer, &read);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
offset =
demux->header_partition_pack_offset +
demux->partition.this_partition - demux->partition.prev_partition;
goto next_try;
}
if (mxf_is_metadata (&key)) {
ret = gst_mxf_demux_handle_metadata (demux, &key, buffer);
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
gst_mxf_demux_reset_metadata (demux);
offset =
demux->header_partition_pack_offset +
demux->partition.this_partition - demux->partition.prev_partition;
goto next_try;
}
} else if (mxf_is_descriptive_metadata (&key) || mxf_is_fill (&key)) {
offset += read;
gst_buffer_unref (buffer);
buffer = NULL;
} else {
break;
}
}
/* resolve references etc */
if (gst_mxf_demux_handle_header_metadata_resolve_references (demux) !=
GST_FLOW_OK
|| gst_mxf_demux_handle_header_metadata_update_streams (demux) !=
GST_FLOW_OK) {
offset =
demux->header_partition_pack_offset + demux->partition.this_partition -
demux->partition.prev_partition;
goto next_try;
}
out:
if (buffer)
gst_buffer_unref (buffer);
mxf_partition_pack_reset (&demux->partition);
mxf_primer_pack_reset (&demux->primer);
memcpy (&demux->partition, &partition, sizeof (MXFPartitionPack));
memcpy (&demux->primer, &primer, sizeof (MXFPrimerPack));
demux->offset = old_offset;
}
static GstFlowReturn
gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
gchar key_str[48];
GstFlowReturn ret = GST_FLOW_OK;
if (demux->update_metadata
&& demux->preface
&& !mxf_is_metadata (key) && !mxf_is_descriptive_metadata (key)
&& !mxf_is_fill (key)) {
if ((ret =
gst_mxf_demux_handle_header_metadata_resolve_references (demux)) !=
GST_FLOW_OK)
goto beach;
if ((ret =
gst_mxf_demux_handle_header_metadata_update_streams (demux)) !=
GST_FLOW_OK)
goto beach;
} else if (demux->metadata_resolved && demux->requested_package_string) {
if ((ret =
gst_mxf_demux_handle_header_metadata_update_streams (demux)) !=
GST_FLOW_OK)
goto beach;
}
if (!mxf_is_mxf_packet (key)) {
GST_WARNING_OBJECT (demux,
"Skipping non-MXF packet of size %u at offset %"
G_GUINT64_FORMAT ", key: %s", GST_BUFFER_SIZE (buffer), demux->offset,
mxf_ul_to_string (key, key_str));
} else if (mxf_is_partition_pack (key)) {
ret = gst_mxf_demux_handle_partition_pack (demux, key, buffer);
} else if (mxf_is_primer_pack (key)) {
ret = gst_mxf_demux_handle_primer_pack (demux, key, buffer);
} else if (mxf_is_metadata (key)) {
ret = gst_mxf_demux_handle_metadata (demux, key, buffer);
} else if (mxf_is_descriptive_metadata (key)) {
ret = gst_mxf_demux_handle_descriptive_metadata (demux, key, buffer);
} else if (mxf_is_generic_container_system_item (key)) {
ret =
gst_mxf_demux_handle_generic_container_system_item (demux, key, buffer);
} else if (mxf_is_generic_container_essence_element (key)) {
ret =
gst_mxf_demux_handle_generic_container_essence_element (demux, key,
buffer);
} else if (mxf_is_random_index_pack (key)) {
ret = gst_mxf_demux_handle_random_index_pack (demux, key, buffer);
} else if (mxf_is_index_table_segment (key)) {
ret = gst_mxf_demux_handle_index_table_segment (demux, key, buffer);
} else if (mxf_is_fill (key)) {
GST_DEBUG_OBJECT (demux,
"Skipping filler packet of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
} else {
GST_DEBUG_OBJECT (demux,
"Skipping unknown packet of size %u at offset %"
G_GUINT64_FORMAT ", key: %s", GST_BUFFER_SIZE (buffer), demux->offset,
mxf_ul_to_string (key, key_str));
}
/* In pull mode try to get the last metadata */
if (mxf_is_partition_pack (key) && ret == GST_FLOW_OK
&& demux->pull_footer_metadata
&& demux->random_access && demux->partition.valid
&& demux->partition.type == MXF_PARTITION_PACK_HEADER
&& (!demux->partition.closed || !demux->partition.complete)
&& demux->footer_partition_pack_offset != 0) {
GST_DEBUG_OBJECT (demux,
"Open or incomplete header partition, trying to get final metadata from the last partitions");
gst_mxf_demux_parse_footer_metadata (demux);
demux->pull_footer_metadata = FALSE;
}
beach:
return ret;
}
static GstFlowReturn
gst_mxf_demux_pull_and_handle_klv_packet (GstMXFDemux * demux)
{
GstBuffer *buffer = NULL;
MXFUL key;
GstFlowReturn ret = GST_FLOW_OK;
guint read = 0;
ret =
gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer,
&read);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto beach;
ret = gst_mxf_demux_handle_klv_packet (demux, &key, buffer);
demux->offset += read;
beach:
if (buffer)
gst_buffer_unref (buffer);
return ret;
}
static void
gst_mxf_demux_loop (GstPad * pad)
{
GstMXFDemux *demux = NULL;
GstFlowReturn ret = GST_FLOW_OK;
demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
if (demux->run_in == -1) {
/* Skip run-in, which is at most 64K and is finished
* by a header partition pack */
while (demux->offset < 64 * 1024) {
GstBuffer *buffer;
if ((ret =
gst_mxf_demux_pull_range (demux, demux->offset, 16,
&buffer)) != GST_FLOW_OK)
break;
if (mxf_is_header_partition_pack ((const MXFUL *)
GST_BUFFER_DATA (buffer))) {
GST_DEBUG_OBJECT (demux,
"Found header partition pack at offset %" G_GUINT64_FORMAT,
demux->offset);
demux->run_in = demux->offset;
demux->header_partition_pack_offset = demux->offset;
gst_buffer_unref (buffer);
break;
}
demux->offset++;
gst_buffer_unref (buffer);
}
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto pause;
if (G_UNLIKELY (demux->run_in == -1)) {
GST_ERROR_OBJECT (demux, "No valid header partition pack found");
ret = GST_FLOW_ERROR;
goto pause;
}
/* First of all pull&parse the random index pack at EOF */
gst_mxf_demux_pull_random_index_pack (demux);
}
/* Now actually do something */
ret = gst_mxf_demux_pull_and_handle_klv_packet (demux);
/* pause if something went wrong */
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto pause;
/* check EOS condition */
if ((demux->segment.flags & GST_SEEK_FLAG_SEGMENT) &&
(demux->segment.stop != -1) &&
(demux->segment.last_stop >= demux->segment.stop)) {
ret = GST_FLOW_UNEXPECTED;
goto pause;
}
gst_object_unref (demux);
return;
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_LOG_OBJECT (demux, "pausing task, reason %s", reason);
gst_pad_pause_task (pad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
if (ret == GST_FLOW_UNEXPECTED) {
/* perform EOS logic */
if (demux->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 = demux->segment.stop) == -1)
stop = demux->segment.duration;
GST_LOG_OBJECT (demux, "Sending segment done, at end of segment");
gst_element_post_message (GST_ELEMENT_CAST (demux),
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
GST_FORMAT_TIME, stop));
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (demux, "Sending EOS, at end of stream");
if (!gst_mxf_demux_push_src_event (demux, gst_event_new_eos ())) {
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
}
}
} else {
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
("Internal data stream error."),
("stream stopped, reason %s", reason));
gst_mxf_demux_push_src_event (demux, gst_event_new_eos ());
}
}
gst_object_unref (demux);
return;
}
}
static GstFlowReturn
gst_mxf_demux_chain (GstPad * pad, GstBuffer * inbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstMXFDemux *demux = NULL;
MXFUL key;
const guint8 *data = NULL;
guint64 length = 0;
guint64 offset = 0;
GstBuffer *buffer = NULL;
demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (demux, "received buffer of %u bytes at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (inbuf), GST_BUFFER_OFFSET (inbuf));
if (G_UNLIKELY (GST_BUFFER_OFFSET (inbuf) == 0)) {
GST_DEBUG_OBJECT (demux, "beginning of file, expect header");
demux->run_in = -1;
demux->offset = 0;
}
if (G_UNLIKELY (demux->offset == 0 && GST_BUFFER_OFFSET (inbuf) != 0)) {
GST_DEBUG_OBJECT (demux, "offset was zero, synchronizing with buffer's");
demux->offset = GST_BUFFER_OFFSET (inbuf);
}
gst_adapter_push (demux->adapter, inbuf);
inbuf = NULL;
while (ret == GST_FLOW_OK) {
if (G_UNLIKELY (demux->flushing)) {
GST_DEBUG_OBJECT (demux, "we are now flushing, exiting parser loop");
ret = GST_FLOW_WRONG_STATE;
break;
}
if (gst_adapter_available (demux->adapter) < 16)
break;
if (demux->run_in == -1) {
/* Skip run-in, which is at most 64K and is finished
* by a header partition pack */
while (demux->offset < 64 * 1024
&& gst_adapter_available (demux->adapter) >= 16) {
data = gst_adapter_peek (demux->adapter, 16);
if (mxf_is_header_partition_pack ((const MXFUL *)
data)) {
GST_DEBUG_OBJECT (demux,
"Found header partition pack at offset %" G_GUINT64_FORMAT,
demux->offset);
demux->run_in = demux->offset;
demux->header_partition_pack_offset = demux->offset;
break;
}
gst_adapter_flush (demux->adapter, 1);
}
} else if (demux->offset < demux->run_in) {
gst_adapter_flush (demux->adapter,
MIN (gst_adapter_available (demux->adapter),
demux->run_in - demux->offset));
continue;
}
if (G_UNLIKELY (ret != GST_FLOW_OK))
break;
/* Need more data */
if (demux->run_in == -1 && demux->offset < 64 * 1024)
break;
if (G_UNLIKELY (demux->run_in == -1)) {
GST_ERROR_OBJECT (demux, "No valid header partition pack found");
ret = GST_FLOW_ERROR;
break;
}
if (gst_adapter_available (demux->adapter) < 17)
break;
/* Now actually do something */
memset (&key, 0, sizeof (MXFUL));
/* Pull 16 byte key and first byte of BER encoded length */
data = gst_adapter_peek (demux->adapter, 17);
memcpy (&key, data, 16);
/* Decode BER encoded packet length */
if ((data[16] & 0x80) == 0) {
length = data[16];
offset = 17;
} else {
guint slen = data[16] & 0x7f;
offset = 16 + 1 + slen;
/* Must be at most 8 according to SMPTE-379M 5.3.4 and
* GStreamer buffers can only have a 4 bytes length */
if (slen > 8) {
GST_ERROR_OBJECT (demux, "Invalid KLV packet length: %u", slen);
ret = GST_FLOW_ERROR;
break;
}
if (gst_adapter_available (demux->adapter) < 17 + slen)
break;
data = gst_adapter_peek (demux->adapter, 17 + slen);
data += 17;
length = 0;
while (slen) {
length = (length << 8) | *data;
data++;
slen--;
}
}
/* GStreamer's buffer sizes are stored in a guint so we
* limit ourself to G_MAXUINT large buffers */
if (length > G_MAXUINT) {
GST_ERROR_OBJECT (demux,
"Unsupported KLV packet length: %" G_GUINT64_FORMAT, length);
ret = GST_FLOW_ERROR;
break;
}
if (gst_adapter_available (demux->adapter) < offset + length)
break;
gst_adapter_flush (demux->adapter, offset);
buffer = gst_adapter_take_buffer (demux->adapter, length);
ret = gst_mxf_demux_handle_klv_packet (demux, &key, buffer);
gst_buffer_unref (buffer);
}
gst_object_unref (demux);
return ret;
}
static gboolean
gst_mxf_demux_src_event (GstPad * pad, GstEvent * event)
{
GstMXFDemux *demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
gboolean ret;
GST_DEBUG_OBJECT (pad, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* TODO: handle this */
gst_event_unref (event);
ret = FALSE;
break;
default:
ret = gst_pad_push_event (demux->sinkpad, event);
break;
}
gst_object_unref (demux);
return ret;
}
static const GstQueryType *
gst_mxf_demux_src_query_type (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_mxf_demux_src_query (GstPad * pad, GstQuery * query)
{
GstMXFDemux *demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
gboolean ret = FALSE;
GstMXFDemuxPad *mxfpad = GST_MXF_DEMUX_PAD (pad);
GST_DEBUG_OBJECT (pad, "handling query %s",
gst_query_type_get_name (GST_QUERY_TYPE (query)));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 pos;
gst_query_parse_position (query, &format, NULL);
if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT)
goto error;
pos = mxfpad->essence_element_count;
if (format == GST_FORMAT_TIME) {
if (!mxfpad->material_track || mxfpad->material_track->edit_rate.n == 0
|| mxfpad->material_track->edit_rate.d == 0)
goto error;
pos =
gst_util_uint64_scale (pos + mxfpad->material_track->origin,
GST_SECOND * mxfpad->material_track->edit_rate.d,
mxfpad->material_track->edit_rate.n);
}
GST_DEBUG_OBJECT (pad,
"Returning position %" G_GINT64_FORMAT " in format %s", pos,
gst_format_get_name (format));
gst_query_set_position (query, format, pos);
ret = TRUE;
break;
}
case GST_QUERY_DURATION:{
gint64 duration;
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT)
goto error;
if (!mxfpad->material_track || !mxfpad->material_track->parent.sequence)
goto error;
duration = mxfpad->material_track->parent.sequence->duration;
if (format == GST_FORMAT_TIME) {
if (mxfpad->material_track->edit_rate.n == 0 ||
mxfpad->material_track->edit_rate.d == 0)
goto error;
duration =
gst_util_uint64_scale (duration,
GST_SECOND * mxfpad->material_track->edit_rate.d,
mxfpad->material_track->edit_rate.n);
}
GST_DEBUG_OBJECT (pad,
"Returning duration %" G_GINT64_FORMAT " in format %s", duration,
gst_format_get_name (format));
gst_query_set_duration (query, format, duration);
ret = TRUE;
break;
}
default:
/* else forward upstream */
ret = gst_pad_peer_query (demux->sinkpad, query);
break;
}
done:
gst_object_unref (demux);
return ret;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (pad, "query failed");
goto done;
}
}
static gboolean
gst_mxf_demux_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);
}
}
static gboolean
gst_mxf_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
{
GstMXFDemux *demux;
demux = GST_MXF_DEMUX (gst_pad_get_parent (sinkpad));
demux->random_access = FALSE;
gst_object_unref (demux);
return TRUE;
}
static gboolean
gst_mxf_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstMXFDemux *demux;
demux = GST_MXF_DEMUX (gst_pad_get_parent (sinkpad));
if (active) {
demux->random_access = TRUE;
gst_object_unref (demux);
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_mxf_demux_loop,
sinkpad);
} else {
demux->random_access = FALSE;
gst_object_unref (demux);
return gst_pad_stop_task (sinkpad);
}
}
static gboolean
gst_mxf_demux_sink_event (GstPad * pad, GstEvent * event)
{
GstMXFDemux *demux;
gboolean ret = FALSE;
demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (pad, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
demux->flushing = TRUE;
ret = gst_mxf_demux_push_src_event (demux, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_mxf_demux_flush (demux, TRUE);
ret = gst_mxf_demux_push_src_event (demux, event);
break;
case GST_EVENT_EOS:
if (!gst_mxf_demux_push_src_event (demux, event))
GST_WARNING_OBJECT (pad, "failed pushing EOS on streams");
ret = TRUE;
break;
case GST_EVENT_NEWSEGMENT:
/* TODO: handle this */
gst_event_unref (event);
ret = FALSE;
break;
default:
ret = gst_mxf_demux_push_src_event (demux, event);
break;
}
gst_object_unref (demux);
return ret;
}
static GstStateChangeReturn
gst_mxf_demux_change_state (GstElement * element, GstStateChange transition)
{
GstMXFDemux *demux = GST_MXF_DEMUX (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_mxf_demux_reset (demux);
break;
default:
break;
}
return ret;
}
static void
gst_mxf_demux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMXFDemux *demux = GST_MXF_DEMUX (object);
switch (prop_id) {
case PROP_PACKAGE:
g_free (demux->requested_package_string);
demux->requested_package_string = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mxf_demux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMXFDemux *demux = GST_MXF_DEMUX (object);
switch (prop_id) {
case PROP_PACKAGE:
g_value_set_string (value, demux->current_package_string);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mxf_demux_finalize (GObject * object)
{
GstMXFDemux *demux = GST_MXF_DEMUX (object);
if (demux->adapter) {
g_object_unref (demux->adapter);
demux->adapter = NULL;
}
if (demux->new_seg_event) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
if (demux->close_seg_event) {
gst_event_unref (demux->close_seg_event);
demux->close_seg_event = NULL;
}
g_free (demux->current_package_string);
demux->current_package_string = NULL;
g_free (demux->requested_package_string);
demux->requested_package_string = NULL;
gst_mxf_demux_remove_pads (demux);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_mxf_demux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mxf_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mxf_src_template));
gst_element_class_set_details_simple (element_class, "MXF Demuxer",
"Codec/Demuxer",
"Demux MXF files", "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
static void
gst_mxf_demux_class_init (GstMXFDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (mxfdemux_debug, "mxfdemux", 0, "MXF demuxer");
gobject_class->finalize = gst_mxf_demux_finalize;
gobject_class->set_property = gst_mxf_demux_set_property;
gobject_class->get_property = gst_mxf_demux_get_property;
g_object_class_install_property (gobject_class, PROP_PACKAGE,
g_param_spec_string ("package", "Package",
"Material or Source package to use for playback", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_mxf_demux_change_state);
}
static void
gst_mxf_demux_init (GstMXFDemux * demux, GstMXFDemuxClass * g_class)
{
demux->sinkpad =
gst_pad_new_from_static_template (&mxf_sink_template, "sink");
gst_pad_set_event_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_event));
gst_pad_set_chain_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_chain));
gst_pad_set_activate_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate));
gst_pad_set_activatepull_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate_pull));
gst_pad_set_activatepush_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate_push));
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
demux->adapter = gst_adapter_new ();
demux->src = g_ptr_array_new ();
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
gst_mxf_demux_reset (demux);
}
Reference in a new issue View git blame Copy permalink