gstreamer/gst/mxf/mxfmpeg.c

/* 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 381M - Mapping MPEG streams into the MXF
 * Generic Container
 */

/* TODO:
 * - Handle PES streams
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gst/gst.h>
#include <string.h>

#include "mxfmpeg.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
};

gboolean
mxf_metadata_mpeg_video_descriptor_parse (const MXFUL * key,
    MXFMetadataMPEGVideoDescriptor * descriptor,
    const MXFPrimerPack * primer, guint16 type, const guint8 * data, guint size)
{
  guint16 tag, tag_size;
  const guint8 *tag_data;

  g_return_val_if_fail (data != NULL, FALSE);

  memset (descriptor, 0, sizeof (MXFMetadataMPEGVideoDescriptor));

  if (!mxf_metadata_cdci_picture_essence_descriptor_parse (key,
          (MXFMetadataCDCIPictureEssenceDescriptor *) descriptor, primer, type,
          data, size))
    goto error;

  while (mxf_local_tag_parse (data, size, &tag, &tag_size, &tag_data)) {
    MXFUL *tag_ul = NULL;

    if (tag_size == 0 || tag == 0x0000)
      goto next;

    if (!(tag_ul =
            (MXFUL *) g_hash_table_lookup (primer->mappings,
                GUINT_TO_POINTER (((guint) tag)))))
      goto next;

    if (memcmp (tag_ul, &_single_sequence_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->single_sequence = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_constant_b_frames_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->const_b_frames = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_coded_content_type_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->coded_content_type = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_low_delay_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->low_delay = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_closed_gop_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->closed_gop = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_identical_gop_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->identical_gop = GST_READ_UINT8 (tag_data);
    } else if (memcmp (tag_ul, &_max_gop_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 2)
        goto error;
      descriptor->max_gop = GST_READ_UINT16_BE (tag_data);
    } else if (memcmp (tag_ul, &_b_picture_count_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 2)
        goto error;
      descriptor->b_picture_count = GST_READ_UINT16_BE (tag_data);
    } else if (memcmp (tag_ul, &_bitrate_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 4)
        goto error;
      descriptor->bitrate = GST_READ_UINT32_BE (tag_data);
    } else if (memcmp (tag_ul, &_profile_and_level_ul, 16) == 0) {
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (tag_size != 1)
        goto error;
      descriptor->profile_and_level = GST_READ_UINT8 (tag_data);
    } else {
      if (type != MXF_METADATA_MPEG_VIDEO_DESCRIPTOR)
        goto next;
      GST_WRITE_UINT16_BE (data, 0x0000);
      if (!gst_metadata_add_custom_tag (primer, tag, tag_data, tag_size,
              &((MXFMetadataGenericDescriptor *) descriptor)->other_tags))
        goto error;
    }
  next:
    data += 4 + tag_size;
    size -= 4 + tag_size;
  }

  GST_DEBUG ("Parsed mpeg video descriptors:");
  GST_DEBUG ("  single sequence = %s",
      (descriptor->single_sequence) ? "yes" : "no");
  GST_DEBUG ("  constant b frames = %s",
      (descriptor->single_sequence) ? "yes" : "no");
  GST_DEBUG ("  coded content type = %u", descriptor->coded_content_type);
  GST_DEBUG ("  low delay = %s", (descriptor->low_delay) ? "yes" : "no");
  GST_DEBUG ("  closed gop = %s", (descriptor->closed_gop) ? "yes" : "no");
  GST_DEBUG ("  identical gop = %s",
      (descriptor->identical_gop) ? "yes" : "no");
  GST_DEBUG ("  max gop = %u", descriptor->max_gop);
  GST_DEBUG ("  b picture count = %u", descriptor->b_picture_count);
  GST_DEBUG ("  bitrate = %u", descriptor->bitrate);
  GST_DEBUG ("  profile & level = %u", descriptor->profile_and_level);

  return TRUE;

error:
  GST_ERROR ("Invalid mpeg video descriptor");
  mxf_metadata_mpeg_video_descriptor_reset (descriptor);

  return FALSE;
}

void mxf_metadata_mpeg_video_descriptor_reset
    (MXFMetadataMPEGVideoDescriptor * descriptor)
{
  g_return_if_fail (descriptor != NULL);

  mxf_metadata_cdci_picture_essence_descriptor_reset (
      (MXFMetadataCDCIPictureEssenceDescriptor *) descriptor);

  memset (descriptor, 0, sizeof (MXFMetadataMPEGVideoDescriptor));
}

gboolean
mxf_is_mpeg_video_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 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;
}

static GstFlowReturn
mxf_mpeg_video_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
    GstCaps * caps, MXFMetadataGenericPackage * package,
    MXFMetadataTrack * track, MXFMetadataStructuralComponent * component,
    gpointer mapping_data, GstBuffer ** outbuf)
{
  *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;
  }

  return GST_FLOW_OK;
}


GstCaps *
mxf_mpeg_video_create_caps (MXFMetadataGenericPackage * package,
    MXFMetadataTrack * track, GstTagList ** tags,
    MXFEssenceElementHandler * handler, gpointer * mapping_data)
{
  MXFMetadataMPEGVideoDescriptor *d = NULL;
  MXFMetadataFileDescriptor *f = NULL;
  guint i;

  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_MPEG_VIDEO_DESCRIPTOR) {
      d = (MXFMetadataMPEGVideoDescriptor *) track->descriptor[i];
      f = track->descriptor[i];
      break;
    } else if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->type ==
        MXF_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR
        || ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type ==
        MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR
        || ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type ==
        MXF_METADATA_FILE_DESCRIPTOR) {
      f = track->descriptor[i];
    }
  }

  if (!f) {
    GST_ERROR ("No descriptor found for this track");
    return NULL;
  }

  *handler = mxf_mpeg_video_handle_essence_element;
  /* SMPTE 381M 7 */
  if (f->essence_container.u[13] == 0x04) {
    /* FIXME: get mpeg version somehow */
    GST_DEBUG ("Found MPEG ES stream");
    return gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 1,
        "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
  } 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");
    return gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 1,
        "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
  } else if (f->essence_container.u[13] == 0x09) {
    GST_DEBUG ("Found MPEG TS stream");
    return gst_caps_new_simple ("video/mpegts", NULL);
  }
  return NULL;
}