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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
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