diff options
Diffstat (limited to 'gst/mxf/mxfd10.c')
| -rw-r--r-- | gst/mxf/mxfd10.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/gst/mxf/mxfd10.c b/gst/mxf/mxfd10.c new file mode 100644 index 00000000..75e74008 --- /dev/null +++ b/gst/mxf/mxfd10.c @@ -0,0 +1,229 @@ +/* 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. + */ + +/* Implementation of SMPTE 386M - Mapping Type-D10 essence data into the MXF + * Generic Container + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> +#include <string.h> + +#include "mxfd10.h" +#include "mxfmpeg.h" +#include "mxfaes-bwf.h" + +GST_DEBUG_CATEGORY_EXTERN (mxf_debug); +#define GST_CAT_DEFAULT mxf_debug + +gboolean +mxf_is_d10_essence_track (const MXFMetadataTrack * track) +{ + guint i; + + g_return_val_if_fail (track != NULL, FALSE); + + if (track->descriptor == NULL) + return FALSE; + + for (i = 0; i < track->n_descriptor; i++) { + MXFMetadataFileDescriptor *d = track->descriptor[i]; + MXFUL *key = &d->essence_container; + /* SMPTE 386M 5.1 */ + if (mxf_is_generic_container_essence_container_label (key) && + key->u[12] == 0x02 && key->u[13] == 0x01 && + (key->u[14] >= 0x01 && key->u[14] <= 0x06) && + (key->u[15] == 0x01 || key->u[15] == 0x02)) + return TRUE; + } + + return FALSE; +} + +static GstFlowReturn +mxf_d10_picture_handle_essence_element (const MXFUL * key, GstBuffer * buffer, + GstCaps * caps, MXFMetadataGenericPackage * package, + MXFMetadataTrack * track, MXFMetadataStructuralComponent * component, + gpointer mapping_data, GstBuffer ** outbuf) +{ + *outbuf = buffer; + + /* SMPTE 386M 5.2.1 */ + if (key->u[12] != 0x05 || key->u[13] != 0x01 || key->u[14] != 0x01) { + GST_ERROR ("Invalid D10 picture essence element"); + return GST_FLOW_ERROR; + } + + return GST_FLOW_OK; +} + +static GstFlowReturn +mxf_d10_sound_handle_essence_element (const MXFUL * key, GstBuffer * buffer, + GstCaps * caps, MXFMetadataGenericPackage * package, + MXFMetadataTrack * track, MXFMetadataStructuralComponent * component, + gpointer mapping_data, GstBuffer ** outbuf) +{ + guint i, j, nsamples; + gint width, channels; + GstStructure *s = gst_caps_get_structure (caps, 0); + const guint8 *indata; + guint8 *outdata; + + if (!gst_structure_get_int (s, "width", &width) || + !gst_structure_get_int (s, "channels", &channels)) { + GST_ERROR ("Invalid caps"); + return GST_FLOW_ERROR; + } + + width /= 8; + + /* SMPTE 386M 5.3.1 */ + if (key->u[12] != 0x06 || key->u[13] != 0x01 || key->u[14] != 0x10) { + GST_ERROR ("Invalid D10 sound essence element"); + return GST_FLOW_ERROR; + } + + /* Now transform raw AES3 into raw audio, see SMPTE 331M */ + if ((GST_BUFFER_SIZE (buffer) - 4) % 32 != 0) { + GST_ERROR ("Invalid D10 sound essence buffer size"); + return GST_FLOW_ERROR; + } + + nsamples = ((GST_BUFFER_SIZE (buffer) - 4) / 4) / 8; + + *outbuf = gst_buffer_new_and_alloc (nsamples * width * channels); + gst_buffer_copy_metadata (*outbuf, buffer, + GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS | + GST_BUFFER_COPY_CAPS); + + indata = GST_BUFFER_DATA (buffer); + outdata = GST_BUFFER_DATA (*outbuf); + + for (i = 0; i < nsamples; i++) { + for (j = 0; j < channels; j++) { + guint32 in = GST_READ_UINT32_LE (indata); + + if (width == 2) { + in = (in >> 12) & 0xffff; + GST_WRITE_UINT16_LE (outdata, in); + } else if (width == 3) { + in = (in >> 4) & 0xffffff; + GST_WRITE_UINT24_LE (outdata, in); + } + indata += 4; + outdata += width; + } + indata += 4 * (8 - channels); + } + + gst_buffer_unref (buffer); + + return GST_FLOW_OK; +} + +GstCaps * +mxf_d10_create_caps (MXFMetadataGenericPackage * package, + MXFMetadataTrack * track, GstTagList ** tags, + MXFEssenceElementHandler * handler, gpointer * mapping_data) +{ + MXFMetadataGenericPictureEssenceDescriptor *p = NULL; + MXFMetadataGenericSoundEssenceDescriptor *s = NULL; + guint i; + GstCaps *caps = NULL; + + g_return_val_if_fail (package != NULL, NULL); + g_return_val_if_fail (track != NULL, NULL); + + if (track->descriptor == NULL) { + GST_ERROR ("No descriptor found for this track"); + return NULL; + } + + for (i = 0; i < track->n_descriptor; i++) { + if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR || + ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_MPEG_VIDEO_DESCRIPTOR || + ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR) { + p = (MXFMetadataGenericPictureEssenceDescriptor *) track->descriptor[i]; + break; + } else if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR || + ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_WAVE_AUDIO_ESSENCE_DESCRIPTOR || + ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type == + MXF_METADATA_AES3_AUDIO_ESSENCE_DESCRIPTOR) { + s = (MXFMetadataGenericSoundEssenceDescriptor *) track->descriptor[i]; + break; + } + } + + if (!s && !p) { + GST_ERROR ("No descriptor found for this track"); + return NULL; + } + + if (!*tags) + *tags = gst_tag_list_new (); + + if (s) { + if (s->channel_count == 0 || + s->quantization_bits == 0 || + s->audio_sampling_rate.n == 0 || s->audio_sampling_rate.d == 0) { + GST_ERROR ("Invalid descriptor"); + return NULL; + } + + if (s->quantization_bits != 16 && s->quantization_bits != 24) { + GST_ERROR ("Invalid width %u", s->quantization_bits); + return NULL; + } + + /* FIXME: set channel layout */ + + caps = gst_caps_new_simple ("audio/x-raw-int", + "rate", G_TYPE_INT, + (gint) (((gdouble) s->audio_sampling_rate.n) / + ((gdouble) s->audio_sampling_rate.d) + 0.5), "channels", + G_TYPE_INT, s->channel_count, "signed", G_TYPE_BOOLEAN, + (s->quantization_bits != 8), "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, + "depth", G_TYPE_INT, s->quantization_bits, "width", G_TYPE_INT, + s->quantization_bits, NULL); + + *handler = mxf_d10_sound_handle_essence_element; + + gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC, + "SMPTE D-10 Audio", NULL); + } else if (p) { + caps = + gst_caps_new_simple ("video/mpeg", "systemstream", G_TYPE_BOOLEAN, + FALSE, "mpegversion", G_TYPE_INT, 2, NULL); + mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps); + + *handler = mxf_d10_picture_handle_essence_element; + gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC, + "SMPTE D-10 Video", NULL); + } + + return caps; +} |