/* Quicktime muxer plugin for GStreamer

 * Copyright (C) 2008 Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br>

 * Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sf.net>

 *

 * 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.

 */

/*

 * Unless otherwise indicated, Source Code is licensed under MIT license.

 * See further explanation attached in License Statement (distributed in the file

 * LICENSE).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy of

 * this software and associated documentation files (the "Software"), to deal in

 * the Software without restriction, including without limitation the rights to

 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is furnished to do

 * so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in all

 * copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

#include "atoms.h"

#include <string.h>

#include <glib.h>

/* only needed for gst_util_uint64_scale */

#include <gst/gst.h>

/**

 * Creates a new AtomsContext for the given flavor.

 */

AtomsContext *

atoms_context_new (AtomsTreeFlavor flavor)

{

  AtomsContext *context = g_new0 (AtomsContext, 1);

  context->flavor = flavor;

  return context;

}

/**

 * Frees an AtomsContext and all memory associated with it

 */

void

atoms_context_free (AtomsContext * context)

{

  g_free (context);

}

/* -- creation, initialization, clear and free functions -- */

#define SECS_PER_DAY (24 * 60 * 60)

#define LEAP_YEARS_FROM_1904_TO_1970 17

static guint64

get_current_qt_time ()

{

  GTimeVal timeval;

  g_get_current_time (&timeval);

  /* FIXME this should use UTC coordinated time */

  return timeval.tv_sec + (((1970 - 1904) * (guint64) 365) +

      LEAP_YEARS_FROM_1904_TO_1970) * SECS_PER_DAY;

}

static void

common_time_info_init (TimeInfo * ti)

{

  ti->creation_time = ti->modification_time = get_current_qt_time ();

  ti->timescale = 0;

  ti->duration = 0;

}

static void

atom_header_set (Atom * header, guint32 fourcc, gint32 size, gint64 ext_size)

{

  header->type = fourcc;

  header->size = size;

  header->extended_size = ext_size;

}

static void

atom_clear (Atom * atom)

{

}

static void

atom_full_init (AtomFull * full, guint32 fourcc, gint32 size, gint64 ext_size,

    guint8 version, guint8 flags[3])

{

  atom_header_set (&(full->header), fourcc, size, ext_size);

  full->version = version;

  full->flags[0] = flags[0];

  full->flags[1] = flags[1];

  full->flags[2] = flags[2];

}

static void

atom_full_clear (AtomFull * full)

{

  atom_clear (&full->header);

}

static void

atom_full_free (AtomFull * full)

{

  atom_full_clear (full);

  g_free (full);

}

static AtomInfo *

build_atom_info_wrapper (Atom * atom, gpointer copy_func, gpointer free_func)

{

  AtomInfo *info = NULL;

  if (atom) {

    info = g_new0 (AtomInfo, 1);

    info->atom = atom;

    info->copy_data_func = copy_func;

    info->free_func = free_func;

  }

  return info;

}

static GList *

atom_info_list_prepend_atom (GList * ai, Atom * atom,

    AtomCopyDataFunc copy_func, AtomFreeFunc free_func)

{

  if (atom)

    return g_list_prepend (ai,

        build_atom_info_wrapper (atom, (gpointer)copy_func, (gpointer)free_func));

  else

    return ai;

}

static void

atom_info_list_free (GList * ai)

{

  while (ai) {

    AtomInfo *info = (AtomInfo *) ai->data;

    info->free_func (info->atom);

    g_free (info);

    ai = g_list_delete_link (ai, ai);

  }

}

static AtomData *

atom_data_new (guint32 fourcc)

{

  AtomData *data = g_new0 (AtomData, 1);

  atom_header_set (&data->header, fourcc, 0, 0);

  return data;

}

static void

atom_data_alloc_mem (AtomData * data, guint32 size)

{

  if (data->data) {

    g_free (data->data);

  }

  data->data = g_new0 (guint8, size);

  data->datalen = size;

}

static AtomData *

atom_data_new_from_gst_buffer (guint32 fourcc, const GstBuffer * buf)

{

  AtomData *data = atom_data_new (fourcc);

  atom_data_alloc_mem (data, GST_BUFFER_SIZE (buf));

  g_memmove (data->data, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));

  return data;

}

static void

atom_data_free (AtomData * data)

{

  atom_clear (&data->header);

  g_free (data->data);

  g_free (data);

}

static void

atom_ftyp_init (AtomFTYP * ftyp, guint32 major, guint32 version, GList * brands)

{

  gint index;

  GList *it = NULL;

  atom_header_set (&ftyp->header, FOURCC_ftyp, 16, 0);

  ftyp->major_brand = major;

  ftyp->version = version;

  /* always include major brand as compatible brand */

  ftyp->compatible_brands_size = g_list_length (brands) + 1;

  ftyp->compatible_brands = g_new (guint32, ftyp->compatible_brands_size);

  ftyp->compatible_brands[0] = major;

  index = 1;

  for (it = brands; it != NULL; it = g_list_next (it)) {

    ftyp->compatible_brands[index++] = GPOINTER_TO_UINT (it->data);

  }

}

AtomFTYP *

atom_ftyp_new (AtomsContext * context, guint32 major, guint32 version,

    GList * brands)

{

  AtomFTYP *ftyp = g_new0 (AtomFTYP, 1);

  atom_ftyp_init (ftyp, major, version, brands);

  return ftyp;

}

void

atom_ftyp_free (AtomFTYP * ftyp)

{

  atom_clear (&ftyp->header);

  g_free (ftyp->compatible_brands);

  ftyp->compatible_brands = NULL;

  g_free (ftyp);

}

static void

atom_esds_init (AtomESDS * esds)

{

  guint8 flags[3] = { 0, 0, 0 };

  atom_full_init (&esds->header, FOURCC_esds, 0, 0, 0, flags);

  desc_es_init (&esds->es);

}

static AtomESDS *

atom_esds_new ()

{

  AtomESDS *esds = g_new0 (AtomESDS, 1);

  atom_esds_init (esds);

  return esds;

}

static void

atom_esds_free (AtomESDS * esds)

{

  atom_full_clear (&esds->header);

  desc_es_descriptor_clear (&esds->es);

  g_free (esds);

}

static AtomFRMA *

atom_frma_new ()

{

  AtomFRMA *frma = g_new0 (AtomFRMA, 1);

  atom_header_set (&frma->header, FOURCC_frma, 0, 0);

  return frma;

}

static void

atom_frma_free (AtomFRMA * frma)

{

  atom_clear (&frma->header);

  g_free (frma);

}

static AtomWAVE *

atom_wave_new ()

{

  AtomWAVE *wave = g_new0 (AtomWAVE, 1);

  atom_header_set (&wave->header, FOURCC_wave, 0, 0);

  return wave;

}

static void

atom_wave_free (AtomWAVE * wave)

{

  atom_clear (&wave->header);

  atom_info_list_free (wave->extension_atoms);

  g_free (wave);

}

static void

atom_sample_entry_init (SampleTableEntry * se, guint32 type)

{

  atom_header_set (&se->header, type, 0, 0);

  memset (se->reserved, 0, sizeof (guint8) * 6);

  se->data_reference_index = 0;

}

static void

atom_sample_entry_free (SampleTableEntry * se)

{

  atom_clear (&se->header);

}

static void

sample_entry_mp4a_init (SampleTableEntryMP4A * mp4a)

{

  atom_sample_entry_init (&mp4a->se, FOURCC_mp4a);

  mp4a->version = 0;

  mp4a->revision_level = 0;

  mp4a->vendor = 0;

  mp4a->channels = 2;

  mp4a->sample_size = 16;

  mp4a->compression_id = 0;

  mp4a->packet_size = 0;

  mp4a->sample_rate = 0;

  /* following only used if version is 1 */

  mp4a->samples_per_packet = 0;

  mp4a->bytes_per_packet = 0;

  mp4a->bytes_per_frame = 0;

  mp4a->bytes_per_sample = 0;

  mp4a->extension_atoms = NULL;

}

static SampleTableEntryMP4A *

sample_entry_mp4a_new ()

{

  SampleTableEntryMP4A *mp4a = g_new0 (SampleTableEntryMP4A, 1);

  sample_entry_mp4a_init (mp4a);

  return mp4a;

}

static void

sample_entry_mp4a_free (SampleTableEntryMP4A * mp4a)

{

  atom_sample_entry_free (&mp4a->se);

  atom_info_list_free (mp4a->extension_atoms);

  g_free (mp4a);

}

static void

sample_entry_mp4v_init (SampleTableEntryMP4V * mp4v, AtomsContext * context)

{

  atom_sample_entry_init (&mp4v->se, FOURCC_mp4v);

  mp4v->version = 0;

  mp4v->revision_level = 0;

  mp4v->vendor = 0;

  mp4v->temporal_quality = 0;

  mp4v->spatial_quality = 0;

  /* qt and ISO base media do not contradict, and examples agree */

  mp4v->horizontal_resolution = 0x00480000;

  mp4v->vertical_resolution = 0x00480000;

  mp4v->datasize = 0;

  mp4v->frame_count = 1;

  memset (mp4v->compressor, 0, sizeof (guint8) * 32);

  mp4v->depth = 0;

  mp4v->color_table_id = 0;

  mp4v->extension_atoms = NULL;

}

static void

sample_entry_mp4v_free (SampleTableEntryMP4V * mp4v)

{

  atom_sample_entry_free (&mp4v->se);

  atom_info_list_free (mp4v->extension_atoms);

  g_free (mp4v);

}

static SampleTableEntryMP4V *

sample_entry_mp4v_new (AtomsContext * context)

{

  SampleTableEntryMP4V *mp4v = g_new0 (SampleTableEntryMP4V, 1);

  sample_entry_mp4v_init (mp4v, context);

  return mp4v;

}

static void

atom_stsd_init (AtomSTSD * stsd)

{

  guint8 flags[3] = { 0, 0, 0 };

  atom_full_init (&stsd->header, FOURCC_stsd, 0, 0, 0, flags);

  stsd->entries = NULL;

}

static void

atom_stsd_clear (AtomSTSD * stsd)

{

  GList *walker;

  atom_full_clear (&stsd->header);

  walker = stsd->entries;

  while (walker) {

    GList *aux = walker;

    SampleTableEntry *se = (SampleTableEntry *) aux->data;

    walker = g_list_next (walker);

    stsd->entries = g_list_remove_link (stsd->entries, aux);

    switch (se->kind) {

      case AUDIO:

        sample_entry_mp4a_free ((SampleTableEntryMP4A *) se);

        break;

      case VIDEO:

        sample_entry_mp4v_free ((SampleTableEntryMP4V *) se);

        break;

      default:

        /* best possible cleanup */

        atom_sample_entry_free (se);

    }

    g_list_free (aux);

  }

}

static void

atom_ctts_init (AtomCTTS * ctts)

{

  guint8 flags[3] = { 0, 0, 0 };

  atom_full_init (&ctts->header, FOURCC_ctts, 0, 0, 0, flags);

  ctts->entries = NULL;

}

static AtomCTTS *

atom_ctts_new ()

{

  AtomCTTS *ctts = g_new0 (AtomCTTS, 1);

  atom_ctts_init (ctts);

  return ctts;

}

static void

atom_ctts_free (AtomCTTS * ctts)

{

  GList *walker;

  atom_full_clear (&ctts->header);

  walker = ctts->entries;

  while (walker) {

    GList *aux = walker;

    walker = g_list_next (walker);

    ctts->entries = g_list_remove_link (ctts->entries, aux);

    g_free ((CTTSEntry *) aux->data);

    g_list_free (aux);

  }

  g_free (ctts);

}

static void

atom_stts_init (AtomSTTS * stts)

{

  guint8 flags[3] = { 0, 0, 0 };

  atom_full_init (&stts->header, FOURCC_stts, 0, 0, 0, flags);

  stts->entries = NULL;

}

static void

atom_stts_clear (AtomSTTS * stts)

{

  GList *walker;

  atom_full_clear (&stts->header);

  walker = stts->entries;

  while (walker) {

    GList *aux = walker;

    walker = g_list_next (walker);

    stts->entries = g_list_remove_link (stts->entries, aux);

    g_free ((STTSEntry *) aux->data);

    g_list_free (aux);

  }

  stts->n_entries = 0;

}

static void

atom_stsz_init (AtomSTSZ * stsz)

{

  guint8 flags[3] = { 0, 0, 0 };

  atom_full_init (&stsz->header, FOURCC_stsz, 0, 0, 0, flags);

  stsz->sample_size = 0;

  stsz->table_size = 0;

  stsz->entries = NULL;

}

static void

atom_stsz_clear (AtomSTSZ * stsz)

{

  atom_full_clear (&stsz->header);

  g_list_free (stsz->entries);

  stsz->entries = NULL;

  stsz->table_size = 0;

}

static void

atom_stsc_init (AtomSTSC * stsc)

{