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-rw-r--r--src/encoder/OggStream.hxx128
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diff --git a/src/encoder/OggStream.hxx b/src/encoder/OggStream.hxx
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+/*
+ * Copyright (C) 2003-2012 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.
+ */
+
+#ifndef MPD_OGG_STREAM_HXX
+#define MPD_OGG_STREAM_HXX
+
+#include "check.h"
+
+#include <ogg/ogg.h>
+
+#include <assert.h>
+#include <string.h>
+#include <stdint.h>
+
+class OggStream {
+ ogg_stream_state state;
+
+ bool flush;
+
+#ifndef NDEBUG
+ bool initialized;
+#endif
+
+public:
+#ifndef NDEBUG
+ OggStream():initialized(false) {}
+ ~OggStream() {
+ assert(!initialized);
+ }
+#endif
+
+ void Initialize(int serialno) {
+ assert(!initialized);
+
+ ogg_stream_init(&state, serialno);
+
+ /* set "flush" to true, so the caller gets the full
+ headers on the first read() */
+ flush = true;
+
+#ifndef NDEBUG
+ initialized = true;
+#endif
+ }
+
+ void Reinitialize(int serialno) {
+ assert(initialized);
+
+ ogg_stream_reset_serialno(&state, serialno);
+
+ /* set "flush" to true, so the caller gets the full
+ headers on the first read() */
+ flush = true;
+ }
+
+ void Deinitialize() {
+ assert(initialized);
+
+ ogg_stream_clear(&state);
+
+#ifndef NDEBUG
+ initialized = false;
+#endif
+ }
+
+ void Flush() {
+ assert(initialized);
+
+ flush = true;
+ }
+
+ void PacketIn(const ogg_packet &packet) {
+ assert(initialized);
+
+ ogg_stream_packetin(&state,
+ const_cast<ogg_packet *>(&packet));
+ }
+
+ bool PageOut(ogg_page &page) {
+ int result = ogg_stream_pageout(&state, &page);
+ if (result == 0 && flush) {
+ flush = false;
+ result = ogg_stream_flush(&state, &page);
+ }
+
+ return result != 0;
+ }
+
+ size_t PageOut(void *_buffer, size_t size) {
+ ogg_page page;
+ if (!PageOut(page))
+ return 0;
+
+ assert(page.header_len > 0 || page.body_len > 0);
+
+ size_t header_len = (size_t)page.header_len;
+ size_t body_len = (size_t)page.body_len;
+ assert(header_len <= size);
+
+ if (header_len + body_len > size)
+ /* TODO: better overflow handling */
+ body_len = size - header_len;
+
+ uint8_t *buffer = (uint8_t *)_buffer;
+ memcpy(buffer, page.header, header_len);
+ memcpy(buffer + header_len, page.body, body_len);
+
+ return header_len + body_len;
+ }
+};
+
+#endif