importer/isobm_imp.c

   1 /*****************************************************************************
   2  * isobm_imp.c
   3  *****************************************************************************
   4  * Copyright (C) 2014 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 <string.h>
  26
  27 #define LSMASH_IMPORTER_INTERNAL
  28 #include "importer.h"
  29
  30 /*********************************************************************************
  31     ISO Base Media File Format (ISOBMFF) / QuickTime File Format (QTFF) importer
  32 **********************************************************************************/
  33 #include "core/read.h"
  34 #include "core/timeline.h"
  35
  36 typedef struct
  37 {
  38     uint64_t       timebase;
  39     uint32_t       track_ID;
  40     uint32_t       current_sample_description_index;
  41     uint32_t       au_number;
  42 } isobm_importer_t;
  43
  44 static void remove_isobm_importer( isobm_importer_t *isobm_imp )
  45 {
  46     if( !isobm_imp )
  47         return;
  48     lsmash_free( isobm_imp );
  49 }
  50
  51 static isobm_importer_t *create_isobm_importer( importer_t *importer )
  52 {
  53     isobm_importer_t *isobm_imp = (isobm_importer_t *)lsmash_malloc_zero( sizeof(isobm_importer_t) );
  54     if( isobm_imp )
  55     {
  56         isobm_imp->timebase = 1;
  57         return isobm_imp;
  58     }
  59     else
  60         return NULL;
  61 }
  62
  63 static void isobm_importer_cleanup( importer_t *importer )
  64 {
  65     debug_if( importer && importer->info )
  66         remove_isobm_importer( importer->info );
  67 }
  68
  69 static int isobm_importer_get_accessunit( importer_t *importer, uint32_t track_number, lsmash_sample_t **p_sample )
  70 {
  71     if( !importer->info )
  72         return LSMASH_ERR_NAMELESS;
  73     if( track_number != 1 )
  74         return LSMASH_ERR_FUNCTION_PARAM;
  75     importer_status current_status = importer->status;
  76     if( current_status == IMPORTER_ERROR )
  77         return LSMASH_ERR_NAMELESS;
  78     if( current_status == IMPORTER_EOF )
  79         return IMPORTER_EOF;
  80     isobm_importer_t *isobm_imp = (isobm_importer_t *)importer->info;
  81     lsmash_root_t *root     = importer->root;
  82     uint32_t       track_ID = lsmash_get_track_ID( root, track_number );
  83     if( track_ID != isobm_imp->track_ID )
  84         return LSMASH_ERR_PATCH_WELCOME;
  85     lsmash_sample_t *sample = lsmash_get_sample_from_media_timeline( root, track_ID, isobm_imp->au_number + 1 );
  86     if( !sample )
  87     {
  88         if( lsmash_check_sample_existence_in_media_timeline( root, track_ID, isobm_imp->au_number + 1 ) )
  89             return LSMASH_ERR_NAMELESS;
  90         else
  91         {
  92             /* No more samples. */
  93             importer->status = IMPORTER_EOF;
  94             return IMPORTER_EOF;
  95         }
  96     }
  97     sample->dts /= isobm_imp->timebase;
  98     sample->cts /= isobm_imp->timebase;
  99     if( sample->index != isobm_imp->current_sample_description_index )
 100     {
 101         /* Update the active summary. */
 102         lsmash_summary_t *summary = lsmash_get_summary( root, track_ID, sample->index );
 103         if( !summary )
 104         {
 105             lsmash_delete_sample( sample );
 106             return LSMASH_ERR_NAMELESS;
 107         }
 108         lsmash_remove_entry( importer->summaries, track_number, lsmash_cleanup_summary );
 109         if( lsmash_add_entry( importer->summaries, summary ) < 0 )
 110         {
 111             lsmash_delete_sample( sample );
 112             lsmash_cleanup_summary( (lsmash_summary_t *)summary );
 113             return LSMASH_ERR_MEMORY_ALLOC;
 114         }
 115         isobm_imp->current_sample_description_index = sample->index;
 116         importer->status = IMPORTER_OK;
 117         current_status   = IMPORTER_CHANGE;
 118     }
 119     *p_sample = sample;
 120     ++ isobm_imp->au_number;
 121     return current_status;
 122 }
 123
 124 static int isobm_importer_probe( importer_t *importer )
 125 {
 126     isobm_importer_t *isobm_imp = create_isobm_importer( importer );
 127     if( !isobm_imp )
 128         return LSMASH_ERR_MEMORY_ALLOC;
 129     int err = 0;
 130     /* Get the file size if seekable when reading. */
 131     lsmash_bs_t *bs = importer->bs;
 132     if( !bs->unseekable )
 133     {
 134         int64_t ret = lsmash_bs_read_seek( bs, 0, SEEK_END );
 135         if( ret < 0 )
 136         {
 137             err = ret;
 138             goto fail;
 139         }
 140         bs->written = ret;
 141         lsmash_bs_read_seek( bs, 0, SEEK_SET );
 142     }
 143     if( (err = isom_read_file( importer->file )) < 0 )
 144         goto fail;
 145     if( !(importer->file->flags & (LSMASH_FILE_MODE_BOX
 146                                   | LSMASH_FILE_MODE_FRAGMENTED
 147                                   | LSMASH_FILE_MODE_INITIALIZATION
 148                                   | LSMASH_FILE_MODE_MEDIA
 149                                   | LSMASH_FILE_MODE_INDEX
 150                                   | LSMASH_FILE_MODE_SEGMENT)) )
 151     {
 152         err = LSMASH_ERR_INVALID_DATA;
 153         goto fail;
 154     }
 155     importer->file->flags |= LSMASH_FILE_MODE_BOX;
 156     lsmash_root_t *root = importer->root;
 157     if( root && root == importer->file->root )
 158     {
 159         if( (isobm_imp->track_ID = lsmash_get_track_ID( root, 1 )) == 0 )
 160         {
 161             err = LSMASH_ERR_PATCH_WELCOME;
 162             goto fail;
 163         }
 164         lsmash_summary_t *summary = lsmash_get_summary( root, isobm_imp->track_ID, 1 );
 165         if( (err = lsmash_add_entry( importer->summaries, summary )) < 0 )
 166         {
 167             lsmash_cleanup_summary( (lsmash_summary_t *)summary );
 168             goto fail;
 169         }
 170         isobm_imp->current_sample_description_index = 1;
 171     }
 172     importer->info   = isobm_imp;
 173     importer->status = IMPORTER_OK;
 174     return 0;
 175 fail:
 176     remove_isobm_importer( isobm_imp );
 177     return err;
 178 }
 179
 180 static uint32_t isobm_importer_get_last_delta( importer_t *importer, uint32_t track_number )
 181 {
 182     debug_if( !importer || !importer->info )
 183         return 0;
 184     isobm_importer_t *isobm_imp = (isobm_importer_t *)importer->info;
 185     if( !isobm_imp || track_number != 1 )
 186         return 0;
 187     uint32_t last_sample_delta;
 188     if( lsmash_get_last_sample_delta_from_media_timeline( importer->root, isobm_imp->track_ID, &last_sample_delta ) < 0 )
 189         return 0;
 190     return last_sample_delta / isobm_imp->timebase;
 191 }
 192
 193 static int isobm_importer_construct_timeline( importer_t *importer, uint32_t track_number )
 194 {
 195     lsmash_root_t *root = importer->root;
 196     uint32_t track_ID = lsmash_get_track_ID( root, track_number );
 197     int err = isom_timeline_construct( root, track_ID );
 198     if( err < 0 )
 199         return err;
 200     if( root && root == importer->file->root )
 201     {
 202         lsmash_summary_t *summary = lsmash_get_entry_data( importer->summaries, track_number );
 203         if( !summary )
 204             return LSMASH_ERR_NAMELESS;
 205         summary->max_au_length = lsmash_get_max_sample_size_in_media_timeline( root, track_ID );
 206         if( summary->summary_type == LSMASH_SUMMARY_TYPE_VIDEO )
 207         {
 208             lsmash_media_ts_list_t ts_list;
 209             if( (err = lsmash_get_media_timestamps( root, track_ID, &ts_list )) < 0 )
 210                 return err;
 211             uint32_t last_sample_delta;
 212             if( (err = lsmash_get_last_sample_delta_from_media_timeline( root, track_ID, &last_sample_delta )) < 0 )
 213                 return err;
 214             isobm_importer_t *isobm_imp = (isobm_importer_t *)importer->info;
 215             isobm_imp->timebase = last_sample_delta;
 216             for( uint32_t i = 1; i < ts_list.sample_count; i++ )
 217                 isobm_imp->timebase = lsmash_get_gcd( isobm_imp->timebase, ts_list.timestamp[i].dts - ts_list.timestamp[i - 1].dts );
 218             lsmash_sort_timestamps_composition_order( &ts_list );
 219             for( uint32_t i = 1; i < ts_list.sample_count; i++ )
 220                 isobm_imp->timebase = lsmash_get_gcd( isobm_imp->timebase, ts_list.timestamp[i].cts - ts_list.timestamp[i - 1].cts );
 221             lsmash_delete_media_timestamps( &ts_list );
 222             if( isobm_imp->timebase == 0 )
 223                 isobm_imp->timebase = 1;
 224             ((lsmash_video_summary_t *)summary)->timebase  = isobm_imp->timebase;
 225             ((lsmash_video_summary_t *)summary)->timescale = lsmash_get_media_timescale( root, track_ID );
 226         }
 227     }
 228     return 0;
 229 }
 230
 231 const importer_functions isobm_importer =
 232 {
 233     { "ISOBMFF/QTFF", offsetof( importer_t, log_level ) },
 234     1,
 235     isobm_importer_probe,
 236     isobm_importer_get_accessunit,
 237     isobm_importer_get_last_delta,
 238     isobm_importer_cleanup,
 239     isobm_importer_construct_timeline
 240 };