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586 lines
16 KiB
C++
586 lines
16 KiB
C++
/*************************************************************************/
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/* audio_stream_sample.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_stream_sample.h"
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void AudioStreamPlaybackSample::start(float p_from_pos) {
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for(int i=0;i<2;i++) {
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ima_adpcm[i].step_index=0;
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ima_adpcm[i].predictor=0;
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ima_adpcm[i].loop_step_index=0;
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ima_adpcm[i].loop_predictor=0;
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ima_adpcm[i].last_nibble=-1;
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ima_adpcm[i].loop_pos=0x7FFFFFFF;
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ima_adpcm[i].window_ofs=0;
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ima_adpcm[i].ptr=(const uint8_t*)base->data;
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ima_adpcm[i].ptr+=AudioStreamSample::DATA_PAD;
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}
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seek_pos(p_from_pos);
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sign=1;
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active=true;
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}
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void AudioStreamPlaybackSample::stop() {
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active=false;
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}
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bool AudioStreamPlaybackSample::is_playing() const {
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return active;
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}
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int AudioStreamPlaybackSample::get_loop_count() const {
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return 0;
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}
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float AudioStreamPlaybackSample::get_pos() const {
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return float(offset>>MIX_FRAC_BITS)/base->mix_rate;
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}
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void AudioStreamPlaybackSample::seek_pos(float p_time) {
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if (base->format==AudioStreamSample::FORMAT_IMA_ADPCM)
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return; //no seeking in ima-adpcm
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float max=get_length();
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if (p_time<0) {
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p_time=0;
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} else if (p_time>=max) {
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p_time=max-0.001;
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}
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offset = uint64_t(p_time * base->mix_rate)<<MIX_FRAC_BITS;
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}
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template<class Depth,bool is_stereo,bool is_ima_adpcm>
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void AudioStreamPlaybackSample::do_resample(const Depth* p_src, AudioFrame *p_dst,int64_t &offset,int32_t &increment,uint32_t amount,IMA_ADPCM_State *ima_adpcm) {
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// this function will be compiled branchless by any decent compiler
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int32_t final,final_r,next,next_r;
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while (amount--) {
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int64_t pos=offset >> MIX_FRAC_BITS;
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if (is_stereo && !is_ima_adpcm)
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pos<<=1;
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if (is_ima_adpcm) {
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int64_t sample_pos = pos + ima_adpcm[0].window_ofs;
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while(sample_pos>ima_adpcm[0].last_nibble) {
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static const int16_t _ima_adpcm_step_table[89] = {
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7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
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19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
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50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
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130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
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337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
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876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
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2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
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5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
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15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
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};
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static const int8_t _ima_adpcm_index_table[16] = {
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-1, -1, -1, -1, 2, 4, 6, 8,
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-1, -1, -1, -1, 2, 4, 6, 8
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};
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for(int i=0;i<(is_stereo?2:1);i++) {
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int16_t nibble,diff,step;
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ima_adpcm[i].last_nibble++;
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const uint8_t *src_ptr=ima_adpcm[i].ptr;
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uint8_t nbb = src_ptr[ (ima_adpcm[i].last_nibble>>1) * (is_stereo?2:1) + i ];
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nibble = (ima_adpcm[i].last_nibble&1)?(nbb>>4):(nbb&0xF);
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step=_ima_adpcm_step_table[ima_adpcm[i].step_index];
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ima_adpcm[i].step_index += _ima_adpcm_index_table[nibble];
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if (ima_adpcm[i].step_index<0)
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ima_adpcm[i].step_index=0;
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if (ima_adpcm[i].step_index>88)
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ima_adpcm[i].step_index=88;
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diff = step >> 3 ;
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if (nibble & 1)
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diff += step >> 2 ;
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if (nibble & 2)
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diff += step >> 1 ;
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if (nibble & 4)
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diff += step ;
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if (nibble & 8)
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diff = -diff ;
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ima_adpcm[i].predictor+=diff;
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if (ima_adpcm[i].predictor<-0x8000)
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ima_adpcm[i].predictor=-0x8000;
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else if (ima_adpcm[i].predictor>0x7FFF)
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ima_adpcm[i].predictor=0x7FFF;
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/* store loop if there */
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if (ima_adpcm[i].last_nibble==ima_adpcm[i].loop_pos) {
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ima_adpcm[i].loop_step_index = ima_adpcm[i].step_index;
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ima_adpcm[i].loop_predictor = ima_adpcm[i].predictor;
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}
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//printf("%i - %i - pred %i\n",int(ima_adpcm[i].last_nibble),int(nibble),int(ima_adpcm[i].predictor));
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}
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}
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final=ima_adpcm[0].predictor;
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if (is_stereo) {
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final_r=ima_adpcm[1].predictor;
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}
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} else {
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final=p_src[pos];
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if (is_stereo)
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final_r=p_src[pos+1];
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if (sizeof(Depth)==1) { /* conditions will not exist anymore when compiled! */
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final<<=8;
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if (is_stereo)
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final_r<<=8;
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}
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if (is_stereo) {
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next=p_src[pos+2];
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next_r=p_src[pos+3];
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} else {
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next=p_src[pos+1];
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}
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if (sizeof(Depth)==1) {
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next<<=8;
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if (is_stereo)
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next_r<<=8;
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}
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int32_t frac=int64_t(offset&MIX_FRAC_MASK);
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final=final+((next-final)*frac >> MIX_FRAC_BITS);
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if (is_stereo)
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final_r=final_r+((next_r-final_r)*frac >> MIX_FRAC_BITS);
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}
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if (!is_stereo) {
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final_r=final; //copy to right channel if stereo
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}
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p_dst->l=final/32767.0;
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p_dst->r=final_r/32767.0;
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p_dst++;
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offset+=increment;
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}
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}
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void AudioStreamPlaybackSample::mix(AudioFrame* p_buffer,float p_rate_scale,int p_frames) {
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if (!base->data || !active) {
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for(int i=0;i<p_frames;i++) {
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p_buffer[i]=AudioFrame(0,0);
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}
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return;
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}
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int len = base->data_bytes;
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switch(base->format) {
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case AudioStreamSample::FORMAT_8_BITS: len/=1; break;
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case AudioStreamSample::FORMAT_16_BITS: len/=2; break;
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case AudioStreamSample::FORMAT_IMA_ADPCM: len*=2; break;
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}
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if (base->stereo) {
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len/=2;
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}
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/* some 64-bit fixed point precaches */
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int64_t loop_begin_fp=((int64_t)len<< MIX_FRAC_BITS);
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int64_t loop_end_fp=((int64_t)base->loop_end << MIX_FRAC_BITS);
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int64_t length_fp=((int64_t)len << MIX_FRAC_BITS);
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int64_t begin_limit=(base->loop_mode!=AudioStreamSample::LOOP_DISABLED)?loop_begin_fp:0;
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int64_t end_limit=(base->loop_mode!=AudioStreamSample::LOOP_DISABLED)?loop_end_fp:length_fp;
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bool is_stereo=base->stereo;
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int32_t todo=p_frames;
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float base_rate = AudioServer::get_singleton()->get_mix_rate();
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float srate = base->mix_rate;
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srate*=p_rate_scale;
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float fincrement = srate / base_rate;
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int32_t increment = int32_t(fincrement * MIX_FRAC_LEN);
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increment*=sign;
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//looping
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AudioStreamSample::LoopMode loop_format=base->loop_mode;
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AudioStreamSample::Format format = base->format;
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/* audio data */
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uint8_t *dataptr=(uint8_t*)base->data;
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const void *data=dataptr+AudioStreamSample::DATA_PAD;
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AudioFrame *dst_buff=p_buffer;
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if (format==AudioStreamSample::FORMAT_IMA_ADPCM) {
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if (loop_format!=AudioStreamSample::LOOP_DISABLED) {
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ima_adpcm[0].loop_pos=loop_begin_fp>>MIX_FRAC_BITS;
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ima_adpcm[1].loop_pos=loop_begin_fp>>MIX_FRAC_BITS;
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loop_format=AudioStreamSample::LOOP_FORWARD;
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}
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}
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while (todo>0) {
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int64_t limit=0;
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int32_t target=0,aux=0;
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/** LOOP CHECKING **/
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if ( increment < 0 ) {
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/* going backwards */
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if ( loop_format!=AudioStreamSample::LOOP_DISABLED && offset < loop_begin_fp ) {
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/* loopstart reached */
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if ( loop_format==AudioStreamSample::LOOP_PING_PONG ) {
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/* bounce ping pong */
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offset= loop_begin_fp + ( loop_begin_fp-offset );
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increment=-increment;
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sign*=-1;
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} else {
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/* go to loop-end */
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offset=loop_end_fp-(loop_begin_fp-offset);
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}
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} else {
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/* check for sample not reaching begining */
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if(offset < 0) {
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active=false;
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break;
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}
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}
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} else {
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/* going forward */
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if( loop_format!=AudioStreamSample::LOOP_DISABLED && offset >= loop_end_fp ) {
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/* loopend reached */
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if ( loop_format==AudioStreamSample::LOOP_PING_PONG ) {
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/* bounce ping pong */
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offset=loop_end_fp-(offset-loop_end_fp);
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increment=-increment;
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sign*=-1;
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} else {
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/* go to loop-begin */
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if (format==AudioStreamSample::FORMAT_IMA_ADPCM) {
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for(int i=0;i<2;i++) {
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ima_adpcm[i].step_index=ima_adpcm[i].loop_step_index;
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ima_adpcm[i].predictor=ima_adpcm[i].loop_predictor;
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ima_adpcm[i].last_nibble=loop_begin_fp>>MIX_FRAC_BITS;
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}
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offset=loop_begin_fp;
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} else {
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offset=loop_begin_fp+(offset-loop_end_fp);
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}
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}
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} else {
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/* no loop, check for end of sample */
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if(offset >= length_fp) {
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active=false;
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break;
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}
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}
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}
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/** MIXCOUNT COMPUTING **/
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/* next possible limit (looppoints or sample begin/end */
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limit=(increment < 0) ?begin_limit:end_limit;
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/* compute what is shorter, the todo or the limit? */
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aux=(limit-offset)/increment+1;
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target=(aux<todo)?aux:todo; /* mix target is the shorter buffer */
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/* check just in case */
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if ( target<=0 ) {
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active=false;
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break;
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}
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todo-=target;
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switch(base->format) {
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case AudioStreamSample::FORMAT_8_BITS: {
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if (is_stereo)
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do_resample<int8_t,true,false>((int8_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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else
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do_resample<int8_t,false,false>((int8_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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} break;
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case AudioStreamSample::FORMAT_16_BITS: {
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if (is_stereo)
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do_resample<int16_t,true,false>((int16_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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else
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do_resample<int16_t,false,false>((int16_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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} break;
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case AudioStreamSample::FORMAT_IMA_ADPCM: {
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if (is_stereo)
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do_resample<int8_t,true,true>((int8_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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else
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do_resample<int8_t,false,true>((int8_t*)data,dst_buff,offset,increment,target,ima_adpcm);
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} break;
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}
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dst_buff+=target;
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}
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}
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float AudioStreamPlaybackSample::get_length() const {
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int len = base->data_bytes;
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switch(base->format) {
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case AudioStreamSample::FORMAT_8_BITS: len/=1; break;
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case AudioStreamSample::FORMAT_16_BITS: len/=2; break;
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case AudioStreamSample::FORMAT_IMA_ADPCM: len*=2; break;
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}
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if (base->stereo) {
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len/=2;
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}
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return float(len)/base->mix_rate;
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}
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AudioStreamPlaybackSample::AudioStreamPlaybackSample() {
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active=false;
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offset=0;
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sign=1;
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}
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/////////////////////
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void AudioStreamSample::set_format(Format p_format) {
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format=p_format;
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}
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AudioStreamSample::Format AudioStreamSample::get_format() const{
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return format;
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}
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void AudioStreamSample::set_loop_mode(LoopMode p_loop_mode){
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loop_mode=p_loop_mode;
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}
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AudioStreamSample::LoopMode AudioStreamSample::get_loop_mode() const{
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return loop_mode;
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}
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void AudioStreamSample::set_loop_begin(int p_frame){
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loop_begin=p_frame;
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}
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int AudioStreamSample::get_loop_begin() const{
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return loop_begin;
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}
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void AudioStreamSample::set_loop_end(int p_frame){
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loop_end=p_frame;
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}
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int AudioStreamSample::get_loop_end() const{
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return loop_end;
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}
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void AudioStreamSample::set_mix_rate(int p_hz){
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mix_rate=p_hz;
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}
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int AudioStreamSample::get_mix_rate() const{
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return mix_rate;
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}
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void AudioStreamSample::set_stereo(bool p_enable){
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stereo=p_enable;
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}
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bool AudioStreamSample::is_stereo() const{
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return stereo;
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}
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void AudioStreamSample::set_data(const PoolVector<uint8_t>& p_data) {
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AudioServer::get_singleton()->lock();
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if (data) {
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AudioServer::get_singleton()->audio_data_free(data);
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data=NULL;
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data_bytes=0;
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}
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int datalen = p_data.size();
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if (datalen) {
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PoolVector<uint8_t>::Read r = p_data.read();
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int alloc_len = datalen+DATA_PAD*2;
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data = AudioServer::get_singleton()->audio_data_alloc(alloc_len); //alloc with some padding for interpolation
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zeromem(data,alloc_len);
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uint8_t *dataptr=(uint8_t*)data;
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copymem(dataptr+DATA_PAD,r.ptr(),datalen);
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data_bytes=datalen;
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}
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AudioServer::get_singleton()->unlock();
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}
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PoolVector<uint8_t> AudioStreamSample::get_data() const{
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PoolVector<uint8_t> pv;
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if (data) {
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pv.resize(data_bytes);
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{
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PoolVector<uint8_t>::Write w =pv.write();
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copymem(w.ptr(),data,data_bytes);
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}
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}
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return pv;
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}
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Ref<AudioStreamPlayback> AudioStreamSample::instance_playback() {
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Ref<AudioStreamPlaybackSample> sample;
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sample.instance();
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|
sample->base=Ref<AudioStreamSample>(this);
|
|
return sample;
|
|
}
|
|
|
|
String AudioStreamSample::get_stream_name() const {
|
|
|
|
return "";
|
|
}
|
|
|
|
void AudioStreamSample::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("set_format","format"),&AudioStreamSample::set_format);
|
|
ClassDB::bind_method(D_METHOD("get_format"),&AudioStreamSample::get_format);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_loop_mode","loop_mode"),&AudioStreamSample::set_loop_mode);
|
|
ClassDB::bind_method(D_METHOD("get_loop_mode"),&AudioStreamSample::get_loop_mode);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_loop_begin","loop_begin"),&AudioStreamSample::set_loop_begin);
|
|
ClassDB::bind_method(D_METHOD("get_loop_begin"),&AudioStreamSample::get_loop_begin);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_loop_end","loop_end"),&AudioStreamSample::set_loop_end);
|
|
ClassDB::bind_method(D_METHOD("get_loop_end"),&AudioStreamSample::get_loop_end);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_mix_rate","mix_rate"),&AudioStreamSample::set_mix_rate);
|
|
ClassDB::bind_method(D_METHOD("get_mix_rate"),&AudioStreamSample::get_mix_rate);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_stereo","stereo"),&AudioStreamSample::set_stereo);
|
|
ClassDB::bind_method(D_METHOD("is_stereo"),&AudioStreamSample::is_stereo);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_data","data"),&AudioStreamSample::set_data);
|
|
ClassDB::bind_method(D_METHOD("get_data"),&AudioStreamSample::get_data);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"format",PROPERTY_HINT_ENUM,"8-Bit,16-Bit,IMA-ADPCM"),"set_format","get_format");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"loop_mode",PROPERTY_HINT_ENUM,"Disabled,Forward,Ping-Pong"),"set_loop_mode","get_loop_mode");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"loop_begin"),"set_loop_begin","get_loop_begin");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"loop_end"),"set_loop_end","get_loop_end");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"mix_rate"),"set_mix_rate","get_mix_rate");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL,"stereo"),"set_stereo","is_stereo");
|
|
ADD_PROPERTY(PropertyInfo(Variant::POOL_BYTE_ARRAY,"data",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR),"set_data","get_data");
|
|
|
|
}
|
|
|
|
AudioStreamSample::AudioStreamSample()
|
|
{
|
|
format=FORMAT_8_BITS;
|
|
loop_mode=LOOP_DISABLED;
|
|
stereo=false;
|
|
loop_begin=0;
|
|
loop_end=0;
|
|
mix_rate=44100;
|
|
data=NULL;
|
|
data_bytes=0;
|
|
}
|
|
AudioStreamSample::~AudioStreamSample() {
|
|
|
|
|
|
if (data) {
|
|
AudioServer::get_singleton()->audio_data_free(data);
|
|
data=NULL;
|
|
data_bytes=0;
|
|
}
|
|
}
|