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gstreamer/gst/mxf/mxfaes-bwf.c
Sebastian Dröge 91b35975b5 Generate an index table for essence streams 
Generate an index table for essence streams during playback
and make sure that only the correct essence elements are
used for played tracks.

Make it possible to have one essence stream used in multiple
playback tracks.

Fix some minor bugs.
2009-01-31 11:02:24 +01:00

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27 KiB
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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 382M - Mapping AES3 and Broadcast Wave
* Audio into the MXF Generic Container
*/
/* TODO:
* - Handle the case were a track only references specific channels
* of the essence (ChannelID property)
* - Add support for more codecs
* - Handle more of the metadata inside the descriptors
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "mxfaes-bwf.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
/* SMPTE 382M Annex 1 */
#define MXF_TYPE_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR \
(mxf_metadata_wave_audio_essence_descriptor_get_type())
#define MXF_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),MXF_TYPE_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR, MXFMetadataWaveAudioEssenceDescriptor))
#define MXF_IS_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),MXF_TYPE_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR))
typedef struct _MXFMetadataWaveAudioEssenceDescriptor
MXFMetadataWaveAudioEssenceDescriptor;
typedef MXFMetadataBaseClass MXFMetadataWaveAudioEssenceDescriptorClass;
GType mxf_metadata_wave_audio_essence_descriptor_get_type (void);
struct _MXFMetadataWaveAudioEssenceDescriptor
{
MXFMetadataGenericSoundEssenceDescriptor parent;
guint16 block_align;
guint8 sequence_offset;
guint32 avg_bps;
MXFUL channel_assignment;
guint32 peak_envelope_version;
guint32 peak_envelope_format;
guint32 points_per_peak_value;
guint32 peak_envelope_block_size;
guint32 peak_channels;
guint32 peak_frames;
gint64 peak_of_peaks_position;
MXFTimestamp peak_envelope_timestamp;
guint8 *peak_envelope_data;
guint16 peak_envelope_data_length;
};
/* SMPTE 382M Annex 2 */
#define MXF_TYPE_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR \
(mxf_metadata_aes3_audio_essence_descriptor_get_type())
#define MXF_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),MXF_TYPE_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR, MXFMetadataAES3AudioEssenceDescriptor))
#define MXF_IS_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),MXF_TYPE_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR))
typedef struct _MXFMetadataAES3AudioEssenceDescriptor
MXFMetadataAES3AudioEssenceDescriptor;
typedef MXFMetadataBaseClass MXFMetadataAES3AudioEssenceDescriptorClass;
GType mxf_metadata_aes3_audio_essence_descriptor_get_type (void);
struct _MXFMetadataAES3AudioEssenceDescriptor
{
MXFMetadataWaveAudioEssenceDescriptor parent;
guint8 emphasis;
guint16 block_start_offset;
guint8 auxiliary_bits_mode;
guint32 n_channel_status_mode;
guint8 *channel_status_mode;
guint32 n_fixed_channel_status_data;
guint8 **fixed_channel_status_data;
guint32 n_user_data_mode;
guint8 *user_data_mode;
guint32 n_fixed_user_data;
guint8 **fixed_user_data;
guint32 linked_timecode_track_id;
guint8 stream_number;
};
/* SMPTE 382M Annex 1 */
G_DEFINE_TYPE (MXFMetadataWaveAudioEssenceDescriptor,
mxf_metadata_wave_audio_essence_descriptor,
MXF_TYPE_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR);
static gboolean
mxf_metadata_wave_audio_essence_descriptor_handle_tag (MXFMetadataBase *
metadata, MXFPrimerPack * primer, guint16 tag, const guint8 * tag_data,
guint tag_size)
{
MXFMetadataWaveAudioEssenceDescriptor *self =
MXF_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR (metadata);
gboolean ret = TRUE;
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
switch (tag) {
case 0x3d0a:
if (tag_size != 2)
goto error;
self->block_align = GST_READ_UINT16_BE (tag_data);
GST_DEBUG (" block align = %u", self->block_align);
break;
case 0x3d0b:
if (tag_size != 1)
goto error;
self->sequence_offset = GST_READ_UINT8 (tag_data);
GST_DEBUG (" sequence offset = %u", self->sequence_offset);
break;
case 0x3d09:
if (tag_size != 4)
goto error;
self->avg_bps = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" average bps = %u", self->avg_bps);
break;
case 0x3d32:
if (tag_size != 16)
goto error;
memcpy (&self->channel_assignment, tag_data, 16);
GST_DEBUG (" channel assignment = %s",
mxf_ul_to_string (&self->channel_assignment, str));
break;
case 0x3d29:
if (tag_size != 4)
goto error;
self->peak_envelope_version = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" peak envelope version = %u", self->peak_envelope_version);
break;
case 0x3d2a:
if (tag_size != 4)
goto error;
self->peak_envelope_format = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" peak envelope format = %u", self->peak_envelope_format);
break;
case 0x3d2b:
if (tag_size != 4)
goto error;
self->points_per_peak_value = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" points per peak value = %u", self->points_per_peak_value);
break;
case 0x3d2c:
if (tag_size != 4)
goto error;
self->peak_envelope_block_size = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" peak envelope block size = %u",
self->peak_envelope_block_size);
break;
case 0x3d2d:
if (tag_size != 4)
goto error;
self->peak_channels = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" peak channels = %u", self->peak_channels);
break;
case 0x3d2e:
if (tag_size != 4)
goto error;
self->peak_frames = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" peak frames = %u", self->peak_frames);
break;
case 0x3d2f:
if (tag_size != 8)
goto error;
self->peak_of_peaks_position = GST_READ_UINT64_BE (tag_data);
GST_DEBUG (" peak of peaks position = %" G_GINT64_FORMAT,
self->peak_of_peaks_position);
break;
case 0x3d30:
if (!mxf_timestamp_parse (&self->peak_envelope_timestamp,
tag_data, tag_size))
goto error;
GST_DEBUG (" peak envelope timestamp = %d/%u/%u %u:%u:%u.%u",
self->peak_envelope_timestamp.year,
self->peak_envelope_timestamp.month,
self->peak_envelope_timestamp.day,
self->peak_envelope_timestamp.hour,
self->peak_envelope_timestamp.minute,
self->peak_envelope_timestamp.second,
(self->peak_envelope_timestamp.quarter_msecond * 1000) / 256);
break;
case 0x3d31:
self->peak_envelope_data = g_memdup (tag_data, tag_size);
self->peak_envelope_data_length = tag_size;
GST_DEBUG (" peak evelope data size = %u",
self->peak_envelope_data_length);
break;
default:
ret =
MXF_METADATA_BASE_CLASS
(mxf_metadata_wave_audio_essence_descriptor_parent_class)->handle_tag
(metadata, primer, tag, tag_data, tag_size);
break;
}
return ret;
error:
GST_ERROR
("Invalid wave audio essence descriptor local tag 0x%04x of size %u", tag,
tag_size);
return FALSE;
}
static void
mxf_metadata_wave_audio_essence_descriptor_init
(MXFMetadataWaveAudioEssenceDescriptor * self)
{
}
static void
mxf_metadata_wave_audio_essence_descriptor_class_init
(MXFMetadataWaveAudioEssenceDescriptorClass * klass)
{
MXFMetadataBaseClass *metadata_base_class = (MXFMetadataBaseClass *) klass;
metadata_base_class->handle_tag =
mxf_metadata_wave_audio_essence_descriptor_handle_tag;
}
/* SMPTE 382M Annex 2 */
G_DEFINE_TYPE (MXFMetadataAES3AudioEssenceDescriptor,
mxf_metadata_aes3_audio_essence_descriptor,
MXF_TYPE_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR);
static void
mxf_metadata_aes3_audio_essence_descriptor_finalize (GstMiniObject * object)
{
MXFMetadataAES3AudioEssenceDescriptor *self =
MXF_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR (object);
g_free (self->channel_status_mode);
self->channel_status_mode = NULL;
g_free (self->fixed_channel_status_data);
self->fixed_channel_status_data = NULL;
g_free (self->user_data_mode);
self->user_data_mode = NULL;
g_free (self->fixed_user_data);
self->fixed_user_data = NULL;
GST_MINI_OBJECT_CLASS
(mxf_metadata_aes3_audio_essence_descriptor_parent_class)->finalize
(object);
}
static gboolean
mxf_metadata_aes3_audio_essence_descriptor_handle_tag (MXFMetadataBase *
metadata, MXFPrimerPack * primer, guint16 tag, const guint8 * tag_data,
guint tag_size)
{
MXFMetadataAES3AudioEssenceDescriptor *self =
MXF_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR (metadata);
gboolean ret = TRUE;
switch (tag) {
case 0x3d0d:
if (tag_size != 1)
goto error;
self->emphasis = GST_READ_UINT8 (tag_data);
GST_DEBUG (" emphasis = %u", self->emphasis);
break;
case 0x3d0f:
if (tag_size != 2)
goto error;
self->block_start_offset = GST_READ_UINT16_BE (tag_data);
GST_DEBUG (" block start offset = %u", self->block_start_offset);
break;
case 0x3d08:
if (tag_size != 1)
goto error;
self->auxiliary_bits_mode = GST_READ_UINT8 (tag_data);
GST_DEBUG (" auxiliary bits mode = %u", self->auxiliary_bits_mode);
break;
case 0x3d10:{
guint32 len;
guint i;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" number of channel status mode = %u", len);
self->n_channel_status_mode = len;
if (len == 0)
return TRUE;
if (GST_READ_UINT32_BE (tag_data + 4) != 1)
goto error;
tag_data += 8;
tag_size -= 8;
if (tag_size != len)
goto error;
self->channel_status_mode = g_new0 (guint8, len);
for (i = 0; i < len; i++) {
self->channel_status_mode[i] = GST_READ_UINT8 (tag_data);
GST_DEBUG (" channel status mode %u = %u", i,
self->channel_status_mode[i]);
tag_data++;
tag_size--;
}
break;
}
case 0x3d11:{
guint32 len;
guint i;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" number of fixed channel status data = %u", len);
self->n_fixed_channel_status_data = len;
if (len == 0)
return TRUE;
if (GST_READ_UINT32_BE (tag_data + 4) != 24)
goto error;
tag_data += 8;
tag_size -= 8;
if (tag_size != len * 24)
goto error;
self->fixed_channel_status_data =
g_malloc0 (len * sizeof (guint8 *) + len * 24);
for (i = 0; i < len; i++) {
self->fixed_channel_status_data[i] =
((guint8 *) self->fixed_channel_status_data) +
len * sizeof (guint8 *) + i * 24;
memcpy (self->fixed_channel_status_data[i], tag_data, 24);
GST_DEBUG
(" fixed channel status data %u = 0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x",
i, self->fixed_channel_status_data[i][0],
self->fixed_channel_status_data[i][1],
self->fixed_channel_status_data[i][2],
self->fixed_channel_status_data[i][3],
self->fixed_channel_status_data[i][4],
self->fixed_channel_status_data[i][5],
self->fixed_channel_status_data[i][6],
self->fixed_channel_status_data[i][7],
self->fixed_channel_status_data[i][8],
self->fixed_channel_status_data[i][9],
self->fixed_channel_status_data[i][10],
self->fixed_channel_status_data[i][11],
self->fixed_channel_status_data[i][12],
self->fixed_channel_status_data[i][13],
self->fixed_channel_status_data[i][14],
self->fixed_channel_status_data[i][15],
self->fixed_channel_status_data[i][16],
self->fixed_channel_status_data[i][17],
self->fixed_channel_status_data[i][18],
self->fixed_channel_status_data[i][19],
self->fixed_channel_status_data[i][20],
self->fixed_channel_status_data[i][21],
self->fixed_channel_status_data[i][22],
self->fixed_channel_status_data[i][23]
);
tag_data += 24;
tag_size -= 24;
}
break;
}
case 0x3d12:{
guint32 len;
guint i;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" number of user data mode = %u", len);
self->n_user_data_mode = len;
if (len == 0)
return TRUE;
if (GST_READ_UINT32_BE (tag_data + 4) != 1)
goto error;
tag_data += 8;
tag_size -= 8;
if (tag_size != len)
goto error;
self->user_data_mode = g_new0 (guint8, len);
for (i = 0; i < len; i++) {
self->user_data_mode[i] = GST_READ_UINT8 (tag_data);
GST_DEBUG (" user data mode %u = %u", i, self->user_data_mode[i]);
tag_data++;
tag_size--;
}
break;
}
case 0x3d13:{
guint32 len;
guint i;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" number of fixed user data = %u", len);
self->n_fixed_user_data = len;
if (len == 0)
return TRUE;
if (GST_READ_UINT32_BE (tag_data + 4) != 24)
goto error;
tag_data += 8;
tag_size -= 8;
if (tag_size != len * 24)
goto error;
self->fixed_user_data = g_malloc0 (len * sizeof (guint8 *) + len * 24);
for (i = 0; i < len; i++) {
self->fixed_user_data[i] =
((guint8 *) self->fixed_user_data) + len * sizeof (guint8 *) +
i * 24;
memcpy (self->fixed_user_data[i], tag_data, 24);
GST_DEBUG
(" fixed user data %u = 0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x.0x%02x",
i, self->fixed_user_data[i][0],
self->fixed_user_data[i][1],
self->fixed_user_data[i][2],
self->fixed_user_data[i][3],
self->fixed_user_data[i][4],
self->fixed_user_data[i][5],
self->fixed_user_data[i][6],
self->fixed_user_data[i][7],
self->fixed_user_data[i][8],
self->fixed_user_data[i][9],
self->fixed_user_data[i][10],
self->fixed_user_data[i][11],
self->fixed_user_data[i][12],
self->fixed_user_data[i][13],
self->fixed_user_data[i][14],
self->fixed_user_data[i][15],
self->fixed_user_data[i][16],
self->fixed_user_data[i][17],
self->fixed_user_data[i][18],
self->fixed_user_data[i][19],
self->fixed_user_data[i][20],
self->fixed_user_data[i][21],
self->fixed_user_data[i][22], self->fixed_user_data[i][23]
);
tag_data += 24;
tag_size -= 24;
}
break;
}
/* TODO: linked timecode track / data_stream_number parsing, see
* SMPTE 382M Annex 2 */
default:
ret =
MXF_METADATA_BASE_CLASS
(mxf_metadata_aes3_audio_essence_descriptor_parent_class)->handle_tag
(metadata, primer, tag, tag_data, tag_size);
break;
}
return ret;
error:
GST_ERROR
("Invalid AES3 audio essence descriptor local tag 0x%04x of size %u", tag,
tag_size);
return FALSE;
}
static void
mxf_metadata_aes3_audio_essence_descriptor_init
(MXFMetadataAES3AudioEssenceDescriptor * self)
{
}
static void
mxf_metadata_aes3_audio_essence_descriptor_class_init
(MXFMetadataAES3AudioEssenceDescriptorClass * klass)
{
MXFMetadataBaseClass *metadata_base_class = (MXFMetadataBaseClass *) klass;
GstMiniObjectClass *miniobject_class = (GstMiniObjectClass *) klass;
miniobject_class->finalize =
mxf_metadata_aes3_audio_essence_descriptor_finalize;
metadata_base_class->handle_tag =
mxf_metadata_aes3_audio_essence_descriptor_handle_tag;
}
static gboolean
mxf_is_aes_bwf_essence_track (const MXFMetadataTimelineTrack * track)
{
guint i;
g_return_val_if_fail (track != NULL, FALSE);
if (track->parent.descriptor == NULL) {
GST_ERROR ("No descriptor for this track");
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 382M 9 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 &&
key->u[13] == 0x06 &&
(key->u[14] == 0x01 ||
key->u[14] == 0x02 ||
key->u[14] == 0x03 ||
key->u[14] == 0x04 || key->u[14] == 0x08 || key->u[14] == 0x09))
return TRUE;
}
return FALSE;
}
static GstFlowReturn
mxf_bwf_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps,
MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE 382M Table 1: Check if this is some kind of Wave element */
if (key->u[12] != 0x16 || (key->u[14] != 0x01 && key->u[14] != 0x02
&& key->u[14] != 0x0b)) {
GST_ERROR ("Invalid BWF essence element");
return GST_FLOW_ERROR;
}
/* FIXME: check if the size is a multiply of the unit size, ... */
return GST_FLOW_OK;
}
static GstFlowReturn
mxf_aes3_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps, MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE 382M Table 1: Check if this is some kind of Wave element */
if (key->u[12] != 0x16 || (key->u[14] != 0x03 && key->u[14] != 0x04
&& key->u[14] != 0x0c)) {
GST_ERROR ("Invalid AES3 essence element");
return GST_FLOW_ERROR;
}
/* FIXME: check if the size is a multiply of the unit size, ... */
return GST_FLOW_OK;
}
/* SMPTE RP224 */
static const MXFUL mxf_sound_essence_compression_uncompressed =
{ {0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x02, 0x02, 0x01,
0x7F, 0x00, 0x00, 0x00}
};
static const MXFUL mxf_sound_essence_compression_aiff =
{ {0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x07, 0x04, 0x02, 0x02, 0x01,
0x7E, 0x00, 0x00, 0x00}
};
static const MXFUL mxf_sound_essence_compression_alaw =
{ {0x06, 0x0E, 0x2B, 0x34, 0x04, 0x01, 0x01, 0x03, 0x04, 0x02, 0x02, 0x02,
0x03, 0x01, 0x01, 0x00}
};
static GstCaps *
mxf_bwf_create_caps (MXFMetadataTimelineTrack * track,
MXFMetadataGenericSoundEssenceDescriptor * descriptor, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
GstCaps *ret = NULL;
MXFMetadataWaveAudioEssenceDescriptor *wa_descriptor = NULL;
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
gchar *codec_name = NULL;
if (MXF_IS_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR (descriptor))
wa_descriptor = (MXFMetadataWaveAudioEssenceDescriptor *) descriptor;
/* TODO: Handle width=!depth, needs shifting of samples */
/* FIXME: set a channel layout */
if (mxf_ul_is_zero (&descriptor->sound_essence_compression) ||
mxf_ul_is_equal (&descriptor->sound_essence_compression,
&mxf_sound_essence_compression_uncompressed)) {
guint block_align;
if (descriptor->channel_count == 0 ||
descriptor->quantization_bits == 0 ||
descriptor->audio_sampling_rate.n == 0 ||
descriptor->audio_sampling_rate.d == 0) {
GST_ERROR ("Invalid descriptor");
return NULL;
}
if (wa_descriptor && wa_descriptor->block_align != 0)
block_align = wa_descriptor->block_align;
else
block_align =
(GST_ROUND_UP_8 (descriptor->quantization_bits) *
descriptor->channel_count) / 8;
ret = gst_caps_new_simple ("audio/x-raw-int",
"signed", G_TYPE_BOOLEAN,
(block_align != 1), "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "depth",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, "width",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, NULL);
mxf_metadata_generic_sound_essence_descriptor_set_caps (descriptor, ret);
codec_name =
g_strdup_printf ("Uncompressed %u-bit little endian integer PCM audio",
(block_align / descriptor->channel_count) * 8);
} else if (mxf_ul_is_equal (&descriptor->sound_essence_compression,
&mxf_sound_essence_compression_aiff)) {
guint block_align;
if (descriptor->channel_count == 0 ||
descriptor->quantization_bits == 0 ||
descriptor->audio_sampling_rate.n == 0 ||
descriptor->audio_sampling_rate.d == 0) {
GST_ERROR ("Invalid descriptor");
return NULL;
}
if (wa_descriptor && wa_descriptor->block_align != 0)
block_align = wa_descriptor->block_align;
else
block_align =
(GST_ROUND_UP_8 (descriptor->quantization_bits) *
descriptor->channel_count) / 8;
ret = gst_caps_new_simple ("audio/x-raw-int",
"signed", G_TYPE_BOOLEAN,
(block_align != 1), "endianness", G_TYPE_INT, G_BIG_ENDIAN, "depth",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, "width",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, NULL);
mxf_metadata_generic_sound_essence_descriptor_set_caps (descriptor, ret);
codec_name =
g_strdup_printf ("Uncompressed %u-bit big endian integer PCM audio",
(block_align / descriptor->channel_count) * 8);
} else if (mxf_ul_is_equal (&descriptor->sound_essence_compression,
&mxf_sound_essence_compression_alaw)) {
if (descriptor->audio_sampling_rate.n != 0 ||
descriptor->audio_sampling_rate.d != 0 ||
descriptor->channel_count != 0) {
GST_ERROR ("Invalid descriptor");
return NULL;
}
ret = gst_caps_new_simple ("audio/x-alaw", NULL);
mxf_metadata_generic_sound_essence_descriptor_set_caps (descriptor, ret);
codec_name = g_strdup ("A-law encoded audio");
} else {
GST_ERROR ("Unsupported sound essence compression: %s",
mxf_ul_to_string (&descriptor->sound_essence_compression, str));
}
*handler = mxf_bwf_handle_essence_element;
if (!*tags)
*tags = gst_tag_list_new ();
if (codec_name) {
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
codec_name, NULL);
g_free (codec_name);
}
if (wa_descriptor && wa_descriptor->avg_bps)
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_BITRATE,
wa_descriptor->avg_bps * 8, NULL);
return ret;
}
static GstCaps *
mxf_aes3_create_caps (MXFMetadataTimelineTrack * track,
MXFMetadataGenericSoundEssenceDescriptor * descriptor, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
GstCaps *ret = NULL;
MXFMetadataWaveAudioEssenceDescriptor *wa_descriptor = NULL;
gchar *codec_name = NULL;
guint block_align;
if (MXF_IS_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR (descriptor))
wa_descriptor = (MXFMetadataWaveAudioEssenceDescriptor *) descriptor;
/* FIXME: set a channel layout */
if (descriptor->channel_count == 0 ||
descriptor->quantization_bits == 0 ||
descriptor->audio_sampling_rate.n == 0 ||
descriptor->audio_sampling_rate.d == 0) {
GST_ERROR ("Invalid descriptor");
return NULL;
}
if (wa_descriptor && wa_descriptor->block_align != 0)
block_align = wa_descriptor->block_align;
else
block_align =
(GST_ROUND_UP_8 (descriptor->quantization_bits) *
descriptor->channel_count) / 8;
ret = gst_caps_new_simple ("audio/x-raw-int",
"signed", G_TYPE_BOOLEAN,
(block_align != 1), "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "depth",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, "width",
G_TYPE_INT, (block_align / descriptor->channel_count) * 8, NULL);
mxf_metadata_generic_sound_essence_descriptor_set_caps (descriptor, ret);
codec_name =
g_strdup_printf ("Uncompressed %u-bit AES3 audio",
(block_align / descriptor->channel_count) * 8);
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
codec_name, GST_TAG_BITRATE, block_align * 8, NULL);
g_free (codec_name);
*handler = mxf_aes3_handle_essence_element;
return ret;
}
static GstCaps *
mxf_aes_bwf_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
MXFMetadataGenericSoundEssenceDescriptor *s = NULL;
gboolean bwf = FALSE;
guint i;
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_SOUND_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i])
&& (track->parent.descriptor[i]->essence_container.u[14] == 0x01
|| track->parent.descriptor[i]->essence_container.u[14] == 0x02
|| track->parent.descriptor[i]->essence_container.u[14] == 0x08)) {
s = (MXFMetadataGenericSoundEssenceDescriptor *) track->
parent.descriptor[i];
bwf = TRUE;
break;
} else
if (MXF_IS_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i])
&& (track->parent.descriptor[i]->essence_container.u[14] == 0x03
|| track->parent.descriptor[i]->essence_container.u[14] == 0x04
|| track->parent.descriptor[i]->essence_container.u[14] == 0x09)) {
s = (MXFMetadataGenericSoundEssenceDescriptor *) track->
parent.descriptor[i];
bwf = FALSE;
break;
}
}
if (!s) {
GST_ERROR ("No descriptor found for this track");
return NULL;
} else if (bwf) {
return mxf_bwf_create_caps (track, s, tags, handler, mapping_data);
} else {
return mxf_aes3_create_caps (track, s, tags, handler, mapping_data);
}
return NULL;
}
static const MXFEssenceElementHandler mxf_aes_bwf_essence_handler = {
mxf_is_aes_bwf_essence_track,
mxf_aes_bwf_create_caps
};
void
mxf_aes_bwf_init (void)
{
mxf_metadata_register (0x0148,
MXF_TYPE_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR);
mxf_metadata_register (0x0147,
MXF_TYPE_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR);
mxf_essence_element_handler_register (&mxf_aes_bwf_essence_handler);
}
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