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65009ed81b
Original commit message from CVS: * gst/mxf/mxfaes-bwf.c: (mxf_bwf_create_caps): * gst/mxf/mxfalaw.c: (mxf_alaw_create_caps): * gst/mxf/mxfdemux.c: (gst_mxf_demux_handle_generic_container_essence_element): * gst/mxf/mxfdv-dif.c: (mxf_dv_dif_create_caps): * gst/mxf/mxfjpeg2000.c: (mxf_jpeg2000_create_caps): * gst/mxf/mxfmpeg.c: (mxf_mpeg_es_create_caps), (mxf_mpeg_create_caps): Add the codec name, and if possible the avg bitrate, to the pad's taglist.
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/* GStreamer
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* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* Implementation of SMPTE 388M - Mapping A-Law coded audio into the MXF
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* Generic Container
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <string.h>
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#include "mxfalaw.h"
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GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
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#define GST_CAT_DEFAULT mxf_debug
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gboolean
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mxf_is_alaw_essence_track (const MXFMetadataTrack * track)
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{
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guint i;
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g_return_val_if_fail (track != NULL, FALSE);
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if (track->descriptor == NULL)
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return FALSE;
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for (i = 0; i < track->n_descriptor; i++) {
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MXFMetadataFileDescriptor *d = track->descriptor[i];
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MXFUL *key = &d->essence_container;
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/* SMPTE 388M 6.1 */
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if (mxf_is_generic_container_essence_container_label (key) &&
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key->u[12] == 0x02 && key->u[13] == 0x0a &&
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(key->u[14] == 0x01 || key->u[14] == 0x02 || key->u[14] == 0x03))
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return TRUE;
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}
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return FALSE;
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}
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static GstFlowReturn
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mxf_alaw_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
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GstCaps * caps, MXFMetadataGenericPackage * package,
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MXFMetadataTrack * track, MXFMetadataStructuralComponent * component,
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gpointer mapping_data, GstBuffer ** outbuf)
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{
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*outbuf = buffer;
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/* SMPTE 388M 5.1 */
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if (key->u[12] != 0x16 || (key->u[14] != 0x08 && key->u[14] != 0x09
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&& key->u[14] != 0x0a)) {
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GST_ERROR ("Invalid A-Law essence element");
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return GST_FLOW_ERROR;
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}
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return GST_FLOW_OK;
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}
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GstCaps *
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mxf_alaw_create_caps (MXFMetadataGenericPackage * package,
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MXFMetadataTrack * track, GstTagList ** tags,
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MXFEssenceElementHandler * handler, gpointer * mapping_data)
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{
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MXFMetadataGenericSoundEssenceDescriptor *s = NULL;
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guint i;
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GstCaps *caps = NULL;
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g_return_val_if_fail (package != NULL, NULL);
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g_return_val_if_fail (track != NULL, NULL);
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if (track->descriptor == NULL) {
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GST_ERROR ("No descriptor found for this track");
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return NULL;
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}
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for (i = 0; i < track->n_descriptor; i++) {
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if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->type ==
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MXF_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR) {
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s = (MXFMetadataGenericSoundEssenceDescriptor *) track->descriptor[i];
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break;
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}
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}
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if (!s) {
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GST_ERROR ("No generic sound essence descriptor found for this track");
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return NULL;
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}
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*handler = mxf_alaw_handle_essence_element;
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if (s && s->audio_sampling_rate.n != 0 && s->audio_sampling_rate.d != 0 &&
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s->channel_count != 0) {
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caps = gst_caps_new_simple ("audio/x-alaw", "rate", G_TYPE_INT,
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(gint) (((gdouble) s->audio_sampling_rate.n) /
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((gdouble) s->audio_sampling_rate.d) + 0.5),
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"channels", G_TYPE_INT, s->channel_count, NULL);
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/* TODO: Handle channel layout somehow? */
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if (!*tags)
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*tags = gst_tag_list_new ();
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gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
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"A-law encoded audio", NULL);
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}
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return caps;
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}
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