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gstreamer/gst/mxf/mxfmpeg.c
Sebastian Dröge 6208795598 mxfdemux: Add keyframe detection for MPEG2 video streams 
This is useful for seeking as we usually want to seek to the previous
keyframe. The keyframe detection is done by parsing the MPEG2
elementary stream and if a GOP or I-frame packet is found we
assume a keyframe in this edit unit.
2009-02-06 09:53:13 +01:00

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/* GStreamer
* Copyright (C) 2008-2009 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.
*/
/* Implementation of SMPTE 381M - Mapping MPEG streams into the MXF
* Generic Container
*/
/* TODO:
* - Handle PES streams
* - Fix TS/PS demuxers to forward timestamps
* - h264 support (see SMPTE RP2008)
* - AAC support
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "mxfmpeg.h"
#include <gst/base/gstbytereader.h>
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
/* SMPTE 381M 8.1 - ULs of local tags */
static const guint8 _single_sequence_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x02, 0x00, 0x00
};
static const guint8 _constant_b_frames_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x03, 0x00, 0x00
};
static const guint8 _coded_content_type_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x04, 0x00, 0x00
};
static const guint8 _low_delay_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x05, 0x00, 0x00
};
static const guint8 _closed_gop_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x06, 0x00, 0x00
};
static const guint8 _identical_gop_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x07, 0x00, 0x00
};
static const guint8 _max_gop_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x08, 0x00, 0x00
};
static const guint8 _b_picture_count_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x09, 0x00, 0x00
};
static const guint8 _bitrate_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x0b, 0x00, 0x00
};
static const guint8 _profile_and_level_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x05, 0x04, 0x01, 0x06, 0x02, 0x01,
0x0a, 0x00, 0x00
};
/* SMPTE 381M 8.1 */
#define MXF_TYPE_METADATA_MPEG_VIDEO_DESCRIPTOR \
(mxf_metadata_mpeg_video_descriptor_get_type())
#define MXF_METADATA_MPEG_VIDEO_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),MXF_TYPE_METADATA_MPEG_VIDEO_DESCRIPTOR, MXFMetadataMPEGVideoDescriptor))
#define MXF_IS_METADATA_MPEG_VIDEO_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),MXF_TYPE_METADATA_MPEG_VIDEO_DESCRIPTOR))
typedef struct _MXFMetadataMPEGVideoDescriptor MXFMetadataMPEGVideoDescriptor;
typedef MXFMetadataBaseClass MXFMetadataMPEGVideoDescriptorClass;
GType mxf_metadata_mpeg_video_descriptor_get_type (void);
struct _MXFMetadataMPEGVideoDescriptor
{
MXFMetadataCDCIPictureEssenceDescriptor parent;
gboolean single_sequence;
gboolean const_b_frames;
guint8 coded_content_type;
gboolean low_delay;
gboolean closed_gop;
gboolean identical_gop;
guint16 max_gop;
guint16 b_picture_count;
guint32 bitrate;
guint8 profile_and_level;
};
G_DEFINE_TYPE (MXFMetadataMPEGVideoDescriptor,
mxf_metadata_mpeg_video_descriptor,
MXF_TYPE_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR);
static gboolean
mxf_metadata_mpeg_video_descriptor_handle_tag (MXFMetadataBase * metadata,
MXFPrimerPack * primer, guint16 tag, const guint8 * tag_data,
guint tag_size)
{
MXFMetadataMPEGVideoDescriptor *self =
MXF_METADATA_MPEG_VIDEO_DESCRIPTOR (metadata);
gboolean ret = TRUE;
MXFUL *tag_ul = NULL;
if (!(tag_ul =
(MXFUL *) g_hash_table_lookup (primer->mappings,
GUINT_TO_POINTER (((guint) tag)))))
return FALSE;
if (memcmp (tag_ul, &_single_sequence_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->single_sequence = GST_READ_UINT8 (tag_data);
GST_DEBUG (" single sequence = %s",
(self->single_sequence) ? "yes" : "no");
} else if (memcmp (tag_ul, &_constant_b_frames_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->const_b_frames = GST_READ_UINT8 (tag_data);
GST_DEBUG (" constant b frames = %s",
(self->single_sequence) ? "yes" : "no");
} else if (memcmp (tag_ul, &_coded_content_type_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->coded_content_type = GST_READ_UINT8 (tag_data);
GST_DEBUG (" coded content type = %u", self->coded_content_type);
} else if (memcmp (tag_ul, &_low_delay_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->low_delay = GST_READ_UINT8 (tag_data);
GST_DEBUG (" low delay = %s", (self->low_delay) ? "yes" : "no");
} else if (memcmp (tag_ul, &_closed_gop_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->closed_gop = GST_READ_UINT8 (tag_data);
GST_DEBUG (" closed gop = %s", (self->closed_gop) ? "yes" : "no");
} else if (memcmp (tag_ul, &_identical_gop_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->identical_gop = GST_READ_UINT8 (tag_data);
GST_DEBUG (" identical gop = %s", (self->identical_gop) ? "yes" : "no");
} else if (memcmp (tag_ul, &_max_gop_ul, 16) == 0) {
if (tag_size != 2)
goto error;
self->max_gop = GST_READ_UINT16_BE (tag_data);
GST_DEBUG (" max gop = %u", self->max_gop);
} else if (memcmp (tag_ul, &_b_picture_count_ul, 16) == 0) {
if (tag_size != 2)
goto error;
self->b_picture_count = GST_READ_UINT16_BE (tag_data);
GST_DEBUG (" b picture count = %u", self->b_picture_count);
} else if (memcmp (tag_ul, &_bitrate_ul, 16) == 0) {
if (tag_size != 4)
goto error;
self->bitrate = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" bitrate = %u", self->bitrate);
} else if (memcmp (tag_ul, &_profile_and_level_ul, 16) == 0) {
if (tag_size != 1)
goto error;
self->profile_and_level = GST_READ_UINT8 (tag_data);
GST_DEBUG (" profile & level = %u", self->profile_and_level);
} else {
ret =
MXF_METADATA_BASE_CLASS
(mxf_metadata_mpeg_video_descriptor_parent_class)->handle_tag (metadata,
primer, tag, tag_data, tag_size);
}
return ret;
error:
GST_ERROR ("Invalid MPEG video descriptor local tag 0x%04x of size %u", tag,
tag_size);
return FALSE;
}
static void
mxf_metadata_mpeg_video_descriptor_init (MXFMetadataMPEGVideoDescriptor * self)
{
}
static void
mxf_metadata_mpeg_video_descriptor_class_init
(MXFMetadataMPEGVideoDescriptorClass * klass)
{
MXFMetadataBaseClass *metadata_base_class = (MXFMetadataBaseClass *) klass;
metadata_base_class->handle_tag =
mxf_metadata_mpeg_video_descriptor_handle_tag;
}
typedef enum
{
MXF_MPEG_ESSENCE_TYPE_OTHER = 0,
MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG2,
MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG4,
MXF_MPEG_ESSENCE_TYPE_VIDEO_AVC
} MXFMPEGEssenceType;
static gboolean
mxf_is_mpeg_essence_track (const MXFMetadataTimelineTrack * track)
{
guint i;
g_return_val_if_fail (track != NULL, FALSE);
if (track->parent.descriptor == NULL)
return FALSE;
for (i = 0; i < track->parent.n_descriptor; i++) {
MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
MXFUL *key;
if (!d)
continue;
key = &d->essence_container;
/* SMPTE 381M 7 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 &&
(key->u[13] == 0x04 ||
key->u[13] == 0x07 || key->u[13] == 0x08 || key->u[13] == 0x09))
return TRUE;
}
return FALSE;
}
/* See ISO/IEC 13818-2 for MPEG ES format */
gboolean
mxf_mpeg_is_mpeg2_keyframe (GstBuffer * buffer)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buffer);
guint32 tmp;
while (gst_byte_reader_get_remaining (&reader) > 3) {
if (gst_byte_reader_peek_uint24_be (&reader, &tmp) && tmp == 0x000001) {
guint8 type;
/* Found sync code */
gst_byte_reader_skip (&reader, 3);
if (!gst_byte_reader_get_uint8 (&reader, &type))
break;
/* GOP packets are meant as random access markers */
if (type == 0xb8) {
return TRUE;
} else if (type == 0x00) {
guint8 pic_type;
if (!gst_byte_reader_skip (&reader, 5))
break;
if (!gst_byte_reader_get_uint8 (&reader, &pic_type))
break;
pic_type = (pic_type >> 3) & 0x07;
if (pic_type == 0x01) {
return TRUE;
} else {
return FALSE;
}
}
} else {
gst_byte_reader_skip (&reader, 1);
}
}
return FALSE;
}
static GstFlowReturn
mxf_mpeg_video_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps, MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
MXFMPEGEssenceType type = *((MXFMPEGEssenceType *) mapping_data);
*outbuf = buffer;
/* SMPTE 381M 6.1 */
if (key->u[12] != 0x15 || (key->u[14] != 0x05 && key->u[14] != 0x06
&& key->u[14] != 0x07)) {
GST_ERROR ("Invalid MPEG video essence element");
return GST_FLOW_ERROR;
}
switch (type) {
case MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG2:
if (mxf_mpeg_is_mpeg2_keyframe (buffer))
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
break;
default:
break;
}
return GST_FLOW_OK;
}
static GstFlowReturn
mxf_mpeg_audio_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps, MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE 381M 6.2 */
if (key->u[12] != 0x16 || (key->u[14] != 0x05 && key->u[14] != 0x06
&& key->u[14] != 0x07)) {
GST_ERROR ("Invalid MPEG audio essence element");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
/* Private uid used by SONY C0023S01.mxf,
* taken from the ffmpeg mxf demuxer */
static const guint8 sony_mpeg4_extradata[] = {
0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x0e, 0x06, 0x06, 0x02, 0x02,
0x01, 0x00, 0x00
};
/* RP224 */
static const MXFUL sound_essence_compression_ac3 = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x01, 0x00}
};
static const MXFUL sound_essence_compression_mpeg1_layer1 = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x04, 0x00}
};
static const MXFUL sound_essence_compression_mpeg1_layer12 = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x05, 0x00}
};
static const MXFUL sound_essence_compression_mpeg1_layer2 = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x08, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x05, 0x01}
};
static const MXFUL sound_essence_compression_mpeg2_layer1 = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x06, 0x00}
};
static const MXFUL sound_essence_compression_dts = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x02,
0x03, 0x02, 0x1c, 0x00}
};
static const MXFUL sound_essence_compression_aac = { {
0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x03, 0x04, 0x02, 0x02, 0x02,
0x03, 0x03, 0x01, 0x00}
};
static GstCaps *
mxf_mpeg_es_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data,
MXFMetadataGenericPictureEssenceDescriptor * p,
MXFMetadataGenericSoundEssenceDescriptor * s)
{
GstCaps *caps = NULL;
const gchar *codec_name = NULL;
MXFMPEGEssenceType t, *mdata;
*mapping_data = g_malloc (sizeof (MXFMPEGEssenceType));
mdata = (MXFMPEGEssenceType *) * mapping_data;
/* SMPTE RP224 */
if (p) {
if (mxf_ul_is_zero (&p->picture_essence_coding)) {
GST_WARNING ("No picture essence coding defined, assuming MPEG2");
caps =
gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 2,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
codec_name = "MPEG-2 Video";
t = MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG2;
memcpy (mdata, &t, sizeof (MXFMPEGEssenceType));
} else if (p->picture_essence_coding.u[0] != 0x06
|| p->picture_essence_coding.u[1] != 0x0e
|| p->picture_essence_coding.u[2] != 0x2b
|| p->picture_essence_coding.u[3] != 0x34
|| p->picture_essence_coding.u[4] != 0x04
|| p->picture_essence_coding.u[5] != 0x01
|| p->picture_essence_coding.u[6] != 0x01
|| p->picture_essence_coding.u[8] != 0x04
|| p->picture_essence_coding.u[9] != 0x01
|| p->picture_essence_coding.u[10] != 0x02
|| p->picture_essence_coding.u[11] != 0x02
|| p->picture_essence_coding.u[12] != 0x01) {
GST_ERROR ("No MPEG picture essence coding");
caps = NULL;
} else if (p->picture_essence_coding.u[13] >= 0x01 &&
p->picture_essence_coding.u[13] <= 0x08) {
caps = gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 2,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
codec_name = "MPEG-2 Video";
t = MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG2;
memcpy (mdata, &t, sizeof (MXFMPEGEssenceType));
} else if (p->picture_essence_coding.u[13] == 0x10) {
caps = gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 1,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
codec_name = "MPEG-1 Video";
t = MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG2;
memcpy (mdata, &t, sizeof (MXFMPEGEssenceType));
} else if (p->picture_essence_coding.u[13] == 0x20) {
MXFLocalTag *local_tag =
(((MXFMetadataBase *) p)->other_tags) ?
g_hash_table_lookup (((MXFMetadataBase *)
p)->other_tags, &sony_mpeg4_extradata) : NULL;
caps = gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 4,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
if (local_tag) {
GstBuffer *codec_data = NULL;
codec_data = gst_buffer_new_and_alloc (local_tag->size);
memcpy (GST_BUFFER_DATA (codec_data), local_tag->data, local_tag->size);
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, codec_data,
NULL);
gst_buffer_unref (codec_data);
}
codec_name = "MPEG-4 Video";
t = MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG4;
memcpy (mdata, &t, sizeof (MXFMPEGEssenceType));
} else if ((p->picture_essence_coding.u[13] >> 4) == 0x03) {
/* RP 2008 */
/* TODO: What about codec_data for AVC1 streams? */
caps = gst_caps_new_simple ("video/x-h264", NULL);
codec_name = "h.264 Video";
t = MXF_MPEG_ESSENCE_TYPE_VIDEO_AVC;
memcpy (mdata, &t, sizeof (MXFMPEGEssenceType));
} else {
GST_ERROR ("Unsupported MPEG picture essence coding 0x%02x",
p->picture_essence_coding.u[13]);
caps = NULL;
}
if (caps)
*handler = mxf_mpeg_video_handle_essence_element;
} else if (s) {
if (mxf_ul_is_zero (&s->sound_essence_compression)) {
GST_WARNING ("Zero sound essence compression, assuming MPEG1 audio");
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1,
NULL);
codec_name = "MPEG-1 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_ac3)) {
caps = gst_caps_new_simple ("audio/ac3", NULL);
codec_name = "AC3 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_mpeg1_layer1)) {
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1,
"layer", G_TYPE_INT, 1, NULL);
codec_name = "MPEG-1 Layer 1 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_mpeg1_layer12)) {
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1,
NULL);
codec_name = "MPEG-1 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_mpeg1_layer2)) {
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1,
"layer", G_TYPE_INT, 2, NULL);
codec_name = "MPEG-1 Layer 2 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_mpeg2_layer1)) {
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1,
"layer", G_TYPE_INT, 1, "mpegaudioversion", G_TYPE_INT, 2, NULL);
codec_name = "MPEG-2 Layer 1 Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_dts)) {
caps = gst_caps_new_simple ("audio/x-dts", NULL);
codec_name = "Dolby DTS Audio";
} else if (mxf_ul_is_equal (&s->sound_essence_compression,
&sound_essence_compression_aac)) {
caps = gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT,
2, NULL);
codec_name = "MPEG-2 AAC Audio";
}
if (caps) {
mxf_metadata_generic_sound_essence_descriptor_set_caps (s, caps);
*handler = mxf_mpeg_audio_handle_essence_element;
}
}
if (caps) {
if (!*tags)
*tags = gst_tag_list_new ();
if (codec_name)
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
codec_name, NULL);
}
return caps;
}
static GstCaps *
mxf_mpeg_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
MXFMetadataFileDescriptor *f = NULL;
MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
MXFMetadataGenericSoundEssenceDescriptor *s = NULL;
guint i;
GstCaps *caps = NULL;
g_return_val_if_fail (track != NULL, NULL);
if (track->parent.descriptor == NULL) {
GST_ERROR ("No descriptor found for this track");
return NULL;
}
for (i = 0; i < track->parent.n_descriptor; i++) {
if (!track->parent.descriptor[i])
continue;
if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->parent.
descriptor[i])) {
f = track->parent.descriptor[i];
p = (MXFMetadataGenericPictureEssenceDescriptor *) track->
parent.descriptor[i];
break;
} else if (MXF_IS_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR (track->parent.
descriptor[i])) {
f = track->parent.descriptor[i];
s = (MXFMetadataGenericSoundEssenceDescriptor *) track->
parent.descriptor[i];
break;
}
}
if (!f) {
GST_ERROR ("No descriptor found for this track");
return NULL;
}
/* SMPTE 381M 7 */
if (f->essence_container.u[13] == 0x04) {
GST_DEBUG ("Found MPEG ES stream");
caps = mxf_mpeg_es_create_caps (track, tags, handler, mapping_data, p, s);
} else if (f->essence_container.u[13] == 0x07) {
GST_ERROR ("MPEG PES streams not supported yet");
return NULL;
} else if (f->essence_container.u[13] == 0x08) {
/* FIXME: get mpeg version somehow */
GST_DEBUG ("Found MPEG PS stream");
caps = gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 1,
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"MPEG PS", NULL);
} else if (f->essence_container.u[13] == 0x09) {
GST_DEBUG ("Found MPEG TS stream");
caps = gst_caps_new_simple ("video/mpegts", NULL);
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"MPEG TS", NULL);
} else if (f->essence_container.u[13] == 0x0f) {
GST_DEBUG ("Found h264 NAL unit stream");
/* RP 2008 */
/* TODO: What about codec_data? */
caps = gst_caps_new_simple ("video/x-h264", NULL);
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"h.264 Video", NULL);
} else if (f->essence_container.u[13] == 0x10) {
GST_DEBUG ("Found h264 byte stream stream");
/* RP 2008 */
caps = gst_caps_new_simple ("video/x-h264", NULL);
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"h.264 Video", NULL);
}
if (p && caps)
mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
return caps;
}
static const MXFEssenceElementHandler mxf_mpeg_essence_element_handler = {
mxf_is_mpeg_essence_track,
mxf_mpeg_create_caps
};
void
mxf_mpeg_init (void)
{
mxf_metadata_register (0x0151, MXF_TYPE_METADATA_MPEG_VIDEO_DESCRIPTOR);
mxf_essence_element_handler_register (&mxf_mpeg_essence_element_handler);
}
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