channels.cc

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/* SPDX-FileCopyrightText: 2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include <cstring>
 
#include "MEM_guardedalloc.h"
 
#include "DNA_listBase.h"
#include "DNA_sequence_types.h"
 
#include "BLI_listbase.h"
#include "BLI_string_utf8.h"
 
#include "BLT_translation.hh"
 
#include "sequencer.hh"
 
#include "SEQ_channels.hh"
#include "SEQ_sequencer.hh"
 
namespace blender::seq {
 
ListBase *channels_displayed_get(const Editing *ed)
{
  return ed ? ed->current_channels() : nullptr;
}
 
void channels_ensure(ListBase *channels)
{
  /* Allocate channels. Channel 0 is never used, but allocated to prevent off by 1 issues. */
  for (int i = 0; i < MAX_CHANNELS + 1; i++) {
    SeqTimelineChannel *channel = MEM_callocN<SeqTimelineChannel>("seq timeline channel");
    SNPRINTF_UTF8(channel->name, DATA_("Channel %d"), i);
    channel->index = i;
    BLI_addtail(channels, channel);
  }
}
 
void channels_duplicate(ListBase *channels_dst, ListBase *channels_src)
{
  LISTBASE_FOREACH (SeqTimelineChannel *, channel, channels_src) {
    SeqTimelineChannel *channel_duplicate = static_cast<SeqTimelineChannel *>(
        MEM_dupallocN(channel));
    BLI_addtail(channels_dst, channel_duplicate);
  }
}
 
void channels_free(ListBase *channels)
{
  LISTBASE_FOREACH_MUTABLE (SeqTimelineChannel *, channel, channels) {
    MEM_freeN(channel);
  }
}
 
SeqTimelineChannel *channel_get_by_index(const ListBase *channels, const int channel_index)
{
  return static_cast<SeqTimelineChannel *>(BLI_findlink(channels, channel_index));
}
 
char *channel_name_get(ListBase *channels, const int channel_index)
{
  SeqTimelineChannel *channel = channel_get_by_index(channels, channel_index);
  return channel->name;
}
 
int channel_index_get(const SeqTimelineChannel *channel)
{
  return channel->index;
}
 
bool channel_is_locked(const SeqTimelineChannel *channel)
{
  return (channel->flag & SEQ_CHANNEL_LOCK) != 0;
}
 
bool channel_is_muted(const SeqTimelineChannel *channel)
{
  return (channel->flag & SEQ_CHANNEL_MUTE) != 0;
}
 
ListBase *get_channels_by_strip(Editing *ed, const Strip *strip)
{
  Strip *strip_owner = lookup_meta_by_strip(ed, strip);
  if (strip_owner != nullptr) {
    return &strip_owner->channels;
  }
 
  return &ed->channels;
}
 
}  // namespace blender::seq