129 lines
2.7 KiB
C++
129 lines
2.7 KiB
C++
/*
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* Copyright (C) 2003-2012 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_OGG_STREAM_HXX
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#define MPD_OGG_STREAM_HXX
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#include "check.h"
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#include <ogg/ogg.h>
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#include <assert.h>
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#include <string.h>
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#include <stdint.h>
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class OggStream {
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ogg_stream_state state;
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bool flush;
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#ifndef NDEBUG
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bool initialized;
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#endif
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public:
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#ifndef NDEBUG
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OggStream():initialized(false) {}
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~OggStream() {
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assert(!initialized);
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}
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#endif
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void Initialize(int serialno) {
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assert(!initialized);
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ogg_stream_init(&state, serialno);
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/* set "flush" to true, so the caller gets the full
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headers on the first read() */
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flush = true;
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#ifndef NDEBUG
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initialized = true;
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#endif
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}
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void Reinitialize(int serialno) {
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assert(initialized);
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ogg_stream_reset_serialno(&state, serialno);
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/* set "flush" to true, so the caller gets the full
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headers on the first read() */
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flush = true;
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}
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void Deinitialize() {
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assert(initialized);
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ogg_stream_clear(&state);
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#ifndef NDEBUG
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initialized = false;
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#endif
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}
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void Flush() {
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assert(initialized);
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flush = true;
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}
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void PacketIn(const ogg_packet &packet) {
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assert(initialized);
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ogg_stream_packetin(&state,
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const_cast<ogg_packet *>(&packet));
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}
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bool PageOut(ogg_page &page) {
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int result = ogg_stream_pageout(&state, &page);
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if (result == 0 && flush) {
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flush = false;
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result = ogg_stream_flush(&state, &page);
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}
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return result != 0;
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}
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size_t PageOut(void *_buffer, size_t size) {
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ogg_page page;
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if (!PageOut(page))
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return 0;
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assert(page.header_len > 0 || page.body_len > 0);
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size_t header_len = (size_t)page.header_len;
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size_t body_len = (size_t)page.body_len;
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assert(header_len <= size);
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if (header_len + body_len > size)
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/* TODO: better overflow handling */
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body_len = size - header_len;
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uint8_t *buffer = (uint8_t *)_buffer;
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memcpy(buffer, page.header, header_len);
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memcpy(buffer + header_len, page.body, body_len);
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return header_len + body_len;
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}
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};
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#endif
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