codecs/mp4v.c

   1 /*****************************************************************************
   2  * mp4v.c
   3  *****************************************************************************
   4  * Copyright (C) 2011-2017 L-SMASH project
   5  *
   6  * Authors: Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>
   7  *
   8  * Permission to use, copy, modify, and/or distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  *****************************************************************************/
  20
  21 /* This file is available under an ISC license. */
  22
  23 #include "common/internal.h" /* must be placed first */
  24
  25 #include "core/box.h"
  26
  27 #include "mp4a.h"   /* ugly hack for the definition of mp4a_audioProfileLevelIndication */
  28 #include "mp4sys.h"
  29
  30 int mp4v_update_bitrate( isom_stbl_t *stbl, isom_mdhd_t *mdhd, uint32_t sample_description_index )
  31 {
  32     isom_visual_entry_t *mp4v = (isom_visual_entry_t *)lsmash_list_get_entry_data( &stbl->stsd->list, sample_description_index );
  33     if( LSMASH_IS_NON_EXISTING_BOX( mp4v ) )
  34         return LSMASH_ERR_INVALID_DATA;
  35     isom_esds_t *esds = (isom_esds_t *)isom_get_extension_box_format( &mp4v->extensions, ISOM_BOX_TYPE_ESDS );
  36     if( LSMASH_IS_NON_EXISTING_BOX( esds ) || !esds->ES )
  37         return LSMASH_ERR_INVALID_DATA;
  38     uint32_t bufferSizeDB;
  39     uint32_t maxBitrate;
  40     uint32_t avgBitrate;
  41     int err = isom_calculate_bitrate_description( stbl, mdhd, &bufferSizeDB, &maxBitrate, &avgBitrate, sample_description_index );
  42     if( err < 0 )
  43         return err;
  44     /* FIXME: avgBitrate is 0 only if VBR in proper. */
  45     return mp4sys_update_DecoderConfigDescriptor( esds->ES, bufferSizeDB, maxBitrate, 0 );
  46 }