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gstreamer/gst/mxf/mxfaes-bwf.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 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 = %s",
mxf_timestamp_to_string (&self->peak_envelope_timestamp, str));
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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