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gstreamer/gst/mxf/mxfmpeg.c

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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 gboolean
mxf_mpeg_is_mpeg4_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;
if (type == 0xb6) {
guint8 pic_type;
if (!gst_byte_reader_get_uint8 (&reader, &pic_type))
break;
pic_type = (pic_type >> 6) & 0x03;
if (pic_type == 0) {
return TRUE;
} else {
return FALSE;
}
}
} else {
gst_byte_reader_skip (&reader, 1);
}
}
g_assert_not_reached ();
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;
case MXF_MPEG_ESSENCE_TYPE_VIDEO_MPEG4:
if (mxf_mpeg_is_mpeg4_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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