9741374617
-Fixes long-standing issues regarding to playing a single stream multiple times simultanteously -Fixes wrong-looping, starting, caching, etc. Issues resulting from bad original design -Allows more interesting kinds of streams (stream graphs with streams inside streams!) in the future
560 lines
12 KiB
C++
560 lines
12 KiB
C++
#include "audio_stream_speex.h"
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#include "os_support.h"
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#include "os/os.h"
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#define READ_CHUNK 1024
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static _FORCE_INLINE_ uint16_t le_short(uint16_t s)
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{
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uint16_t ret=s;
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#if 0 //def BIG_ENDIAN_ENABLED
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ret = s>>8;
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ret += s<<8;
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#endif
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return ret;
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}
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int AudioStreamPlaybackSpeex::mix(int16_t* p_buffer,int p_frames) {
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//printf("update, loops %i, read ofs %i\n", (int)loops, read_ofs);
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//printf("playing %i, paused %i\n", (int)playing, (int)paused);
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if (!active || !playing || paused || !data.size())
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return 0;
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/*
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if (read_ofs >= data.size()) {
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if (loops) {
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reload();
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++loop_count;
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} else {
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return;
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};
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};
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*/
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int todo = p_frames;
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if (todo < page_size) {
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return 0;
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};
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int eos = 0;
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bool reloaded=false;
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while (todo > page_size) {
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int ret=0;
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while ((todo>page_size && packets_available && !eos) || (ret = ogg_sync_pageout(&oy, &og))==1) {
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if (!packets_available) {
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/*Add page to the bitstream*/
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ogg_stream_pagein(&os, &og);
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page_granule = ogg_page_granulepos(&og);
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page_nb_packets = ogg_page_packets(&og);
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packet_no=0;
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if (page_granule>0 && frame_size)
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{
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skip_samples = page_nb_packets*frame_size*nframes - (page_granule-last_granule);
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if (ogg_page_eos(&og))
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skip_samples = -skip_samples;
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/*else if (!ogg_page_bos(&og))
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skip_samples = 0;*/
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} else
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{
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skip_samples = 0;
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}
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last_granule = page_granule;
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packets_available=true;
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}
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/*Extract all available packets*/
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//int packet_no=0;
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while (todo > page_size && !eos) {
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if (ogg_stream_packetout(&os, &op)!=1) {
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packets_available=false;
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break;
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}
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packet_no++;
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/*End of stream condition*/
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if (op.e_o_s)
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eos=1;
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/*Copy Ogg packet to Speex bitstream*/
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speex_bits_read_from(&bits, (char*)op.packet, op.bytes);
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for (int j=0;j!=nframes;j++)
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{
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int16_t* out = p_buffer;
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int ret;
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/*Decode frame*/
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ret = speex_decode_int(st, &bits, out);
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/*for (i=0;i<frame_size*channels;i++)
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printf ("%d\n", (int)output[i]);*/
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if (ret==-1) {
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printf("decode returned -1\n");
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break;
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};
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if (ret==-2)
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{
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OS::get_singleton()->printerr( "Decoding error: corrupted stream?\n");
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break;
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}
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if (speex_bits_remaining(&bits)<0)
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{
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OS::get_singleton()->printerr( "Decoding overflow: corrupted stream?\n");
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break;
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}
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//if (channels==2)
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// speex_decode_stereo_int(output, frame_size, &stereo);
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/*Convert to short and save to output file*/
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for (int i=0;i<frame_size*stream_channels;i++) {
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out[i]=le_short(out[i]);
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}
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{
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int frame_offset = 0;
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int new_frame_size = frame_size;
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/*printf ("packet %d %d\n", packet_no, skip_samples);*/
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if (packet_no == 1 && j==0 && skip_samples > 0)
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{
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/*printf ("chopping first packet\n");*/
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new_frame_size -= skip_samples;
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frame_offset = skip_samples;
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}
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if (packet_no == page_nb_packets && skip_samples < 0)
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{
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int packet_length = nframes*frame_size+skip_samples;
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new_frame_size = packet_length - j*frame_size;
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if (new_frame_size<0)
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new_frame_size = 0;
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if (new_frame_size>frame_size)
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new_frame_size = frame_size;
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/*printf ("chopping end: %d %d %d\n", new_frame_size, packet_length, packet_no);*/
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}
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p_buffer+=new_frame_size*stream_channels;
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todo-=new_frame_size;
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}
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}
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};
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};
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//todo = get_todo();
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//todo is still greater than page size, can write more
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if (todo > page_size || eos) {
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if (read_ofs < data.size()) {
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//char *buf;
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int nb_read = MIN(data.size() - read_ofs, READ_CHUNK);
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/*Get the ogg buffer for writing*/
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char* ogg_dst = ogg_sync_buffer(&oy, nb_read);
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/*Read bitstream from input file*/
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copymem(ogg_dst, &data[read_ofs], nb_read);
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read_ofs += nb_read;
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ogg_sync_wrote(&oy, nb_read);
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} else {
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if (loops) {
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reload();
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++loop_count;
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//break;
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} else {
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playing=false;
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unload();
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break;
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};
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}
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};
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};
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return p_frames-todo;
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};
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void AudioStreamPlaybackSpeex::unload() {
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if (!active) return;
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speex_bits_destroy(&bits);
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if (st)
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speex_decoder_destroy(st);
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ogg_sync_clear(&oy);
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active = false;
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//data.resize(0);
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st = NULL;
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frame_size = 0;
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page_size = 0;
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loop_count = 0;
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}
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void *AudioStreamPlaybackSpeex::process_header(ogg_packet *op, int *frame_size, int *rate, int *nframes, int *channels, int *extra_headers) {
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void *st;
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SpeexHeader *header;
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int modeID;
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SpeexCallback callback;
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header = speex_packet_to_header((char*)op->packet, op->bytes);
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if (!header)
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{
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OS::get_singleton()->printerr( "Cannot read header\n");
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return NULL;
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}
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if (header->mode >= SPEEX_NB_MODES)
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{
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OS::get_singleton()->printerr( "Mode number %d does not (yet/any longer) exist in this version\n",
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header->mode);
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return NULL;
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}
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modeID = header->mode;
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const SpeexMode *mode = speex_lib_get_mode (modeID);
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if (header->speex_version_id > 1)
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{
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OS::get_singleton()->printerr( "This file was encoded with Speex bit-stream version %d, which I don't know how to decode\n", header->speex_version_id);
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return NULL;
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}
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if (mode->bitstream_version < header->mode_bitstream_version)
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{
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OS::get_singleton()->printerr( "The file was encoded with a newer version of Speex. You need to upgrade in order to play it.\n");
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return NULL;
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}
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if (mode->bitstream_version > header->mode_bitstream_version)
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{
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OS::get_singleton()->printerr( "The file was encoded with an older version of Speex. You would need to downgrade the version in order to play it.\n");
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return NULL;
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}
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void* state = speex_decoder_init(mode);
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if (!state)
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{
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OS::get_singleton()->printerr( "Decoder initialization failed.\n");
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return NULL;
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}
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//speex_decoder_ctl(state, SPEEX_SET_ENH, &enh_enabled);
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speex_decoder_ctl(state, SPEEX_GET_FRAME_SIZE, frame_size);
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if (!*rate)
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*rate = header->rate;
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speex_decoder_ctl(state, SPEEX_SET_SAMPLING_RATE, rate);
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*nframes = header->frames_per_packet;
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*channels = header->nb_channels;
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if (*channels!=1) {
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OS::get_singleton()->printerr("Only MONO speex streams supported\n");
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return NULL;
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}
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*extra_headers = header->extra_headers;
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speex_free(header);
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return state;
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}
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void AudioStreamPlaybackSpeex::reload() {
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if (active)
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unload();
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if (!data.size())
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return;
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ogg_sync_init(&oy);
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speex_bits_init(&bits);
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read_ofs = 0;
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// char *buf;
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int packet_count = 0;
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int extra_headers = 0;
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int stream_init = 0;
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page_granule=0;
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last_granule=0;
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skip_samples=0;
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page_nb_packets=0;
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packets_available=false;
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packet_no=0;
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int eos = 0;
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do {
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/*Get the ogg buffer for writing*/
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int nb_read = MIN(data.size() - read_ofs, READ_CHUNK);
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char* ogg_dst = ogg_sync_buffer(&oy, nb_read);
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/*Read bitstream from input file*/
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copymem(ogg_dst, &data[read_ofs], nb_read);
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read_ofs += nb_read;
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ogg_sync_wrote(&oy, nb_read);
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/*Loop for all complete pages we got (most likely only one)*/
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while (ogg_sync_pageout(&oy, &og)==1) {
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int packet_no;
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if (stream_init == 0) {
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ogg_stream_init(&os, ogg_page_serialno(&og));
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stream_init = 1;
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}
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/*Add page to the bitstream*/
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ogg_stream_pagein(&os, &og);
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page_granule = ogg_page_granulepos(&og);
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page_nb_packets = ogg_page_packets(&og);
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if (page_granule>0 && frame_size)
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{
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skip_samples = page_nb_packets*frame_size*nframes - (page_granule-last_granule);
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if (ogg_page_eos(&og))
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skip_samples = -skip_samples;
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/*else if (!ogg_page_bos(&og))
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skip_samples = 0;*/
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} else
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{
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skip_samples = 0;
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}
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last_granule = page_granule;
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/*Extract all available packets*/
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packet_no=0;
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while (!eos && ogg_stream_packetout(&os, &op)==1)
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{
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/*If first packet, process as Speex header*/
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if (packet_count==0)
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{
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int rate = 0;
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int channels;
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st = process_header(&op, &frame_size, &rate, &nframes, &channels, &extra_headers);
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if (!nframes)
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nframes=1;
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if (!st) {
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unload();
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return;
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};
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page_size = nframes * frame_size;
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stream_srate=rate;
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stream_channels=channels;
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stream_minbuff_size=page_size;
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} else if (packet_count==1)
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{
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} else if (packet_count<=1+extra_headers)
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{
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/* Ignore extra headers */
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};
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};
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++packet_count;
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};
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} while (packet_count <= extra_headers);
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active=true;
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}
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void AudioStreamPlaybackSpeex::_bind_methods() {
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//ObjectTypeDB::bind_method(_MD("set_file","file"),&AudioStreamPlaybackSpeex::set_file);
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// ObjectTypeDB::bind_method(_MD("get_file"),&AudioStreamPlaybackSpeex::get_file);
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ObjectTypeDB::bind_method(_MD("_set_bundled"),&AudioStreamPlaybackSpeex::_set_bundled);
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ObjectTypeDB::bind_method(_MD("_get_bundled"),&AudioStreamPlaybackSpeex::_get_bundled);
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ADD_PROPERTY( PropertyInfo(Variant::DICTIONARY,"_bundled",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_BUNDLE),_SCS("_set_bundled"),_SCS("_get_bundled"));
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//ADD_PROPERTY( PropertyInfo(Variant::STRING,"file",PROPERTY_HINT_FILE,"*.spx"),_SCS("set_file"),_SCS("get_file"));
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};
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void AudioStreamPlaybackSpeex::_set_bundled(const Dictionary& dict) {
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ERR_FAIL_COND( !dict.has("filename"));
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ERR_FAIL_COND( !dict.has("data"));
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filename = dict["filename"];
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data = dict["data"];
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};
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Dictionary AudioStreamPlaybackSpeex::_get_bundled() const {
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Dictionary d;
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d["filename"] = filename;
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d["data"] = data;
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return d;
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};
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void AudioStreamPlaybackSpeex::set_data(const Vector<uint8_t>& p_data) {
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data=p_data;
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reload();
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}
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void AudioStreamPlaybackSpeex::play(float p_from_pos) {
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reload();
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if (!active)
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return;
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playing = true;
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}
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void AudioStreamPlaybackSpeex::stop(){
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unload();
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playing = false;
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}
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bool AudioStreamPlaybackSpeex::is_playing() const{
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return playing;
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}
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void AudioStreamPlaybackSpeex::set_loop(bool p_enable){
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loops = p_enable;
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}
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bool AudioStreamPlaybackSpeex::has_loop() const{
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return loops;
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}
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float AudioStreamPlaybackSpeex::get_length() const{
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return 0;
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}
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String AudioStreamPlaybackSpeex::get_stream_name() const{
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return "";
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}
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int AudioStreamPlaybackSpeex::get_loop_count() const{
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return 0;
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}
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float AudioStreamPlaybackSpeex::get_pos() const{
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return 0;
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}
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void AudioStreamPlaybackSpeex::seek_pos(float p_time){
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};
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AudioStreamPlaybackSpeex::AudioStreamPlaybackSpeex() {
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active=false;
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st = NULL;
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stream_channels=1;
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stream_srate=1;
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stream_minbuff_size=1;
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}
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AudioStreamPlaybackSpeex::~AudioStreamPlaybackSpeex() {
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unload();
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}
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////////////////////////////////////////
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void AudioStreamSpeex::set_file(const String& p_file) {
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if (this->file == p_file)
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return;
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this->file=p_file;
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if (p_file == "") {
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data.resize(0);
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return;
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};
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Error err;
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FileAccess* file = FileAccess::open(p_file, FileAccess::READ,&err);
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if (err != OK) {
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data.resize(0);
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};
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ERR_FAIL_COND(err != OK);
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this->file = p_file;
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data.resize(file->get_len());
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int read = file->get_buffer(&data[0], data.size());
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memdelete(file);
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}
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RES ResourceFormatLoaderAudioStreamSpeex::load(const String &p_path, const String& p_original_path, Error *r_error) {
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if (r_error)
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*r_error=OK;
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AudioStreamSpeex *stream = memnew(AudioStreamSpeex);
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stream->set_file(p_path);
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return Ref<AudioStreamSpeex>(stream);
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}
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void ResourceFormatLoaderAudioStreamSpeex::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("spx");
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}
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bool ResourceFormatLoaderAudioStreamSpeex::handles_type(const String& p_type) const {
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return (p_type=="AudioStream" || p_type=="AudioStreamSpeex");
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}
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String ResourceFormatLoaderAudioStreamSpeex::get_resource_type(const String &p_path) const {
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if (p_path.extension().to_lower()=="spx")
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return "AudioStreamSpeex";
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return "";
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}
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