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-rw-r--r--modules/opus/audio_stream_opus.cpp376
1 files changed, 376 insertions, 0 deletions
diff --git a/modules/opus/audio_stream_opus.cpp b/modules/opus/audio_stream_opus.cpp
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+++ b/modules/opus/audio_stream_opus.cpp
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+/*************************************************************************/
+/* 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");
+}
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