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authorMax Kellermann <max@duempel.org>2013-01-04 10:16:16 +0100
committerMax Kellermann <max@duempel.org>2013-01-04 10:16:16 +0100
commit22f0a1547c86895b4284b5fdc63ab9c82f24a442 (patch)
treec011204fc1e1a31745e004a3e25d7f9f24f1067e /src/MusicChunk.cxx
parentde0ab43bc12be345d85779e444266153ff5be007 (diff)
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buffer, pipe: convert to C++
Diffstat (limited to 'src/MusicChunk.cxx')
-rw-r--r--src/MusicChunk.cxx105
1 files changed, 105 insertions, 0 deletions
diff --git a/src/MusicChunk.cxx b/src/MusicChunk.cxx
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--- /dev/null
+++ b/src/MusicChunk.cxx
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "MusicChunk.hxx"
+#include "audio_format.h"
+
+extern "C" {
+#include "tag.h"
+}
+
+#include <assert.h>
+
+void
+music_chunk_init(struct music_chunk *chunk)
+{
+ chunk->other = NULL;
+ chunk->length = 0;
+ chunk->tag = NULL;
+ chunk->replay_gain_serial = 0;
+}
+
+void
+music_chunk_free(struct music_chunk *chunk)
+{
+ if (chunk->tag != NULL)
+ tag_free(chunk->tag);
+}
+
+#ifndef NDEBUG
+bool
+music_chunk_check_format(const struct music_chunk *chunk,
+ const struct audio_format *audio_format)
+{
+ assert(chunk != NULL);
+ assert(audio_format != NULL);
+ assert(audio_format_valid(audio_format));
+
+ return chunk->length == 0 ||
+ audio_format_equals(&chunk->audio_format, audio_format);
+}
+#endif
+
+void *
+music_chunk_write(struct music_chunk *chunk,
+ const struct audio_format *audio_format,
+ float data_time, uint16_t bit_rate,
+ size_t *max_length_r)
+{
+ const size_t frame_size = audio_format_frame_size(audio_format);
+ size_t num_frames;
+
+ assert(music_chunk_check_format(chunk, audio_format));
+ assert(chunk->length == 0 || audio_format_valid(&chunk->audio_format));
+
+ if (chunk->length == 0) {
+ /* if the chunk is empty, nobody has set bitRate and
+ times yet */
+
+ chunk->bit_rate = bit_rate;
+ chunk->times = data_time;
+ }
+
+ num_frames = (sizeof(chunk->data) - chunk->length) / frame_size;
+ if (num_frames == 0)
+ return NULL;
+
+#ifndef NDEBUG
+ chunk->audio_format = *audio_format;
+#endif
+
+ *max_length_r = num_frames * frame_size;
+ return chunk->data + chunk->length;
+}
+
+bool
+music_chunk_expand(struct music_chunk *chunk,
+ const struct audio_format *audio_format, size_t length)
+{
+ const size_t frame_size = audio_format_frame_size(audio_format);
+
+ assert(chunk != NULL);
+ assert(chunk->length + length <= sizeof(chunk->data));
+ assert(audio_format_equals(&chunk->audio_format, audio_format));
+
+ chunk->length += length;
+
+ return chunk->length + frame_size > sizeof(chunk->data);
+}