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/*******************************************************************************
* Goggles Audio Player Library *
********************************************************************************
* Copyright (C) 2010-2021 by Sander Jansen. All Rights Reserved *
* --- *
* 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 3 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, see http://www.gnu.org/licenses. *
********************************************************************************/
#include "ap_defs.h"
#include "ap_event_private.h"
#include "ap_packet.h"
#include "ap_ogg_decoder.h"
namespace ap {
OggDecoder::OggDecoder(DecoderContext*e) : DecoderPlugin(e),
buffer(0),
out(nullptr),
stream_position(-1) {
}
OggDecoder::~OggDecoder() {
if (out) {
out->unref();
out=nullptr;
}
}
FXbool OggDecoder::init(ConfigureEvent*event){
DecoderPlugin::init(event);
buffer.clear();
stream_position=-1;
stream_offset_start=event->stream_offset_start;
return true;
}
FXbool OggDecoder::flush(FXlong offset) {
DecoderPlugin::flush(offset);
buffer.clear();
stream_position=-1;
if (out) {
out->unref();
out=nullptr;
}
return true;
}
FXbool OggDecoder::get_next_packet(Packet *& packet) {
FXuint nbytes;
op.packetno = 0;
op.granulepos = -1;
op.b_o_s = 0;
op.e_o_s = 0;
// Partial data from previous packet(s)
if (__unlikely(buffer.size())) {
FXASSERT(buffer.size()>=4);
buffer.read(&nbytes,4);
op.bytes = nbytes;
// data in buffer
if (op.bytes<=buffer.size()) {
op.packet = (FXuchar*)buffer.data();
buffer.readBytes(op.bytes);
return true;
}
// data partial in buffer and in packet
else if (buffer.size()+packet->size()>=op.bytes) {
nbytes = op.bytes - buffer.size();
FXASSERT(op.bytes>buffer.size());
buffer.append(packet->data(),nbytes);
packet->readBytes(nbytes);
op.packet = (FXuchar*)buffer.data();
buffer.readBytes(op.bytes);
return true;
}
// not enough data, buffer data from packet.
else {
buffer.readBytes(-4);
buffer.append(packet->data(),packet->size());
packet->unref();
packet=nullptr;
return false;
}
}
if (__likely(packet->size())) {
FXASSERT(packet->size()>=4);
packet->read(&nbytes,4);
op.bytes = nbytes;
if (op.bytes>packet->size()) {
packet->readBytes(-4);
buffer.append(packet->data(),packet->size());
packet->unref();
packet=nullptr;
return false;
}
else {
op.packet = (FXuchar*)packet->data();
packet->readBytes(op.bytes);
return true;
}
}
packet->unref();
packet=nullptr;
return false;
}
FXbool OggDecoder::process(Packet* packet){
if (packet->stream_position>=0 && buffer.size()==0) {
FXASSERT(stream_position==-1);
stream_position=packet->stream_position;
GM_DEBUG_PRINT("[ogg] new stream position %ld\n",packet->stream_position);
}
return true;
}
}
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