godot/drivers/opus/audio_stream_opus.cpp
2016-01-01 11:50:53 -02:00

377 lines
9.6 KiB
C++

/*************************************************************************/
/* audio_stream_opus.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Author: George Marques <george@gmarqu.es> */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_stream_opus.h"
const float AudioStreamPlaybackOpus::osrate=48000.0f;
int AudioStreamPlaybackOpus::_op_read_func(void *_stream, unsigned char *_ptr, int _nbytes) {
FileAccess *fa=(FileAccess*)_stream;
if(fa->eof_reached())
return 0;
uint8_t *dst = (uint8_t*)_ptr;
int read = fa->get_buffer(dst, _nbytes);
return read;
}
int AudioStreamPlaybackOpus::_op_seek_func(void *_stream, opus_int64 _offset, int _whence){
#ifdef SEEK_SET
FileAccess *fa=(FileAccess*)_stream;
switch (_whence) {
case SEEK_SET: {
fa->seek(_offset);
} break;
case SEEK_CUR: {
fa->seek(fa->get_pos()+_offset);
} break;
case SEEK_END: {
fa->seek_end(_offset);
} break;
default: {
ERR_PRINT("BUG, wtf was whence set to?\n");
}
}
int ret=fa->eof_reached()?-1:0;
return ret;
#else
return -1; // no seeking
#endif
}
int AudioStreamPlaybackOpus::_op_close_func(void *_stream) {
if (!_stream)
return 0;
FileAccess *fa=(FileAccess*)_stream;
if (fa->is_open())
fa->close();
return 0;
}
opus_int64 AudioStreamPlaybackOpus::_op_tell_func(void *_stream) {
FileAccess *_fa = (FileAccess*)_stream;
return (opus_int64)_fa->get_pos();
}
void AudioStreamPlaybackOpus::_clear_stream() {
if(!stream_loaded)
return;
op_free(opus_file);
_close_file();
stream_loaded=false;
stream_channels=1;
playing=false;
}
void AudioStreamPlaybackOpus::_close_file() {
if (f) {
memdelete(f);
f=NULL;
}
}
Error AudioStreamPlaybackOpus::_load_stream() {
ERR_FAIL_COND_V(!stream_valid,ERR_UNCONFIGURED);
_clear_stream();
if (file=="")
return ERR_INVALID_DATA;
Error err;
f=FileAccess::open(file,FileAccess::READ,&err);
if (err) {
ERR_FAIL_COND_V( err, err );
}
int _err = 0;
opus_file = op_open_callbacks(f,&_op_callbacks,NULL,0,&_err);
switch (_err) {
case OP_EREAD: { // - Can't read the file.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_CANT_READ );
} break;
case OP_EVERSION: // - Unrecognized version number.
case OP_ENOTFORMAT: // - Stream is not Opus data.
case OP_EIMPL : { // - Stream used non-implemented feature.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_UNRECOGNIZED );
} break;
case OP_EBADLINK: // - Failed to find old data after seeking.
case OP_EBADTIMESTAMP: // - Timestamp failed the validity checks.
case OP_EBADHEADER: { // - Invalid or mising Opus bitstream header.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_CORRUPT );
} break;
case OP_EFAULT: { // - Internal logic fault; indicates a bug or heap/stack corruption.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_BUG );
} break;
}
repeats=0;
stream_loaded=true;
return OK;
}
AudioStreamPlaybackOpus::AudioStreamPlaybackOpus() {
loops=false;
playing=false;
f = NULL;
stream_loaded=false;
stream_valid=false;
repeats=0;
paused=true;
stream_channels=0;
current_section=0;
length=0;
loop_restart_time=0;
pre_skip=0;
_op_callbacks.read = _op_read_func;
_op_callbacks.seek = _op_seek_func;
_op_callbacks.tell = _op_tell_func;
_op_callbacks.close = _op_close_func;
}
Error AudioStreamPlaybackOpus::set_file(const String &p_file) {
file=p_file;
stream_valid=false;
Error err;
f=FileAccess::open(file,FileAccess::READ,&err);
if (err) {
ERR_FAIL_COND_V( err, err );
}
int _err;
opus_file = op_open_callbacks(f,&_op_callbacks,NULL,0,&_err);
switch (_err) {
case OP_EREAD: { // - Can't read the file.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_CANT_READ );
} break;
case OP_EVERSION: // - Unrecognized version number.
case OP_ENOTFORMAT: // - Stream is not Opus data.
case OP_EIMPL : { // - Stream used non-implemented feature.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_UNRECOGNIZED );
} break;
case OP_EBADLINK: // - Failed to find old data after seeking.
case OP_EBADTIMESTAMP: // - Timestamp failed the validity checks.
case OP_EBADHEADER: { // - Invalid or mising Opus bitstream header.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_FILE_CORRUPT );
} break;
case OP_EFAULT: { // - Internal logic fault; indicates a bug or heap/stack corruption.
memdelete(f); f=NULL;
ERR_FAIL_V( ERR_BUG );
} break;
}
const OpusHead *oinfo = op_head(opus_file,-1);
stream_channels=oinfo->channel_count;
pre_skip=oinfo->pre_skip;
frames_mixed=pre_skip;
ogg_int64_t len = op_pcm_total(opus_file,-1);
if(len < 0) {
length = 0;
} else {
length=(len/osrate);
}
op_free(opus_file);
memdelete(f);
f=NULL;
stream_valid=true;
return OK;
}
void AudioStreamPlaybackOpus::play(float p_from) {
if (playing)
stop();
if (_load_stream()!=OK)
return;
frames_mixed=pre_skip;
playing=true;
if (p_from>0) {
seek_pos(p_from);
}
}
void AudioStreamPlaybackOpus::stop() {
_clear_stream();
playing=false;
}
void AudioStreamPlaybackOpus::seek_pos(float p_time) {
if(!playing) return;
ogg_int64_t pcm_offset = (ogg_int64_t)(p_time * osrate);
bool ok = op_pcm_seek(opus_file,pcm_offset)==0;
if(!ok) {
ERR_PRINT("Seek time over stream size.");
return;
}
frames_mixed=osrate*p_time;
}
int AudioStreamPlaybackOpus::mix(int16_t* p_bufer,int p_frames) {
if (!playing)
return 0;
int total=p_frames;
while (true) {
int todo = p_frames;
if (todo==0 || todo<MIN_MIX) {
break;
}
int ret=op_read(opus_file,(opus_int16*)p_bufer,todo*stream_channels,&current_section);
if (ret<0) {
playing = false;
ERR_EXPLAIN("Error reading Opus File: "+file);
ERR_BREAK(ret<0);
} else if (ret==0) { // end of song, reload?
op_free(opus_file);
_close_file();
f=FileAccess::open(file,FileAccess::READ);
int errv = 0;
opus_file = op_open_callbacks(f,&_op_callbacks,NULL,0,&errv);
if (errv!=0) {
playing=false;
break; // :(
}
if (!has_loop()) {
playing=false;
repeats=1;
break;
}
if (loop_restart_time) {
bool ok = op_pcm_seek(opus_file, (loop_restart_time*osrate)+pre_skip)==0;
if (!ok) {
playing=false;
ERR_PRINT("loop restart time rejected")
}
frames_mixed=(loop_restart_time*osrate)+pre_skip;
} else {
frames_mixed=pre_skip;
}
repeats++;
continue;
}
stream_channels=op_head(opus_file,current_section)->channel_count;
frames_mixed+=ret;
p_bufer+=ret*stream_channels;
p_frames-=ret;
}
return total-p_frames;
}
float AudioStreamPlaybackOpus::get_length() const {
if(!stream_loaded) {
if(const_cast<AudioStreamPlaybackOpus*>(this)->_load_stream() != OK)
return 0;
}
return length;
}
float AudioStreamPlaybackOpus::get_pos() const {
int32_t frames = int32_t(frames_mixed);
if (frames < 0)
frames=0;
return double(frames) / osrate;
}
int AudioStreamPlaybackOpus::get_minimum_buffer_size() const {
return MIN_MIX;
}
AudioStreamPlaybackOpus::~AudioStreamPlaybackOpus() {
_clear_stream();
}
RES ResourceFormatLoaderAudioStreamOpus::load(const String &p_path, const String& p_original_path, Error *r_error) {
if (r_error)
*r_error=OK;
AudioStreamOpus *opus_stream = memnew(AudioStreamOpus);
opus_stream->set_file(p_path);
return Ref<AudioStreamOpus>(opus_stream);
}
void ResourceFormatLoaderAudioStreamOpus::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("opus");
}
String ResourceFormatLoaderAudioStreamOpus::get_resource_type(const String &p_path) const {
if (p_path.extension().to_lower()=="opus")
return "AudioStreamOpus";
return "";
}
bool ResourceFormatLoaderAudioStreamOpus::handles_type(const String& p_type) const {
return (p_type=="AudioStream" || p_type=="AudioStreamOpus");
}