Two more atribute setting functions in Source

[libs/al.git] / source / sound.cpp

diff --git a/source/sound.cpp b/source/sound.cpp
index 896d1d5c392798eb63595b0bb1b1f402a990a1fa..8b6af20fcde8fe2c0ea22951a8d138c3dece0289 100644 (file)
--- a/source/sound.cpp
+++ b/source/sound.cpp
@@ -5,39 +5,108 @@ Copyright © 2008 Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
+#include <cstring>
 #include <msp/core/except.h>
 #include "sound.h"
 
 using namespace std;
 
+namespace {
+
+struct MemorySource
+{
+       const void *data;
+       unsigned length;
+       unsigned pos;
+
+       MemorySource(const void *d, unsigned l): data(d), length(l), pos(0) { }
+};
+
+size_t memory_read(void *ptr, size_t size, size_t nmemb, void *src)
+{
+       MemorySource &memsrc=*reinterpret_cast<MemorySource *>(src);
+       unsigned len=min(size*nmemb, memsrc.length-memsrc.pos);
+       memcpy(ptr, reinterpret_cast<const char *>(memsrc.data)+memsrc.pos, len);
+       memsrc.pos+=len;
+
+       return len/size;
+}
+
+int memory_seek(void *src, ogg_int64_t offset, int whence)
+{
+       MemorySource &memsrc=*reinterpret_cast<MemorySource *>(src);
+       if(whence==SEEK_SET)
+               memsrc.pos=offset;
+       else if(whence==SEEK_CUR)
+               memsrc.pos+=offset;
+       else if(whence==SEEK_END)
+               memsrc.pos=memsrc.length-offset;
+       memsrc.pos=min(memsrc.pos, memsrc.length);
+
+       return memsrc.pos;
+}
+
+void memory_close(void *src)
+{
+       delete reinterpret_cast<MemorySource *>(src);
+}
+
+long memory_tell(void *src)
+{
+       MemorySource &memsrc=*reinterpret_cast<MemorySource *>(src);
+       return memsrc.pos;
+}
+
+ov_callbacks memory_callbacks=
+{
+       &memory_read,
+       &memory_seek,
+       0,
+       &memory_tell
+};
+
+} // namespace
+
 namespace Msp {
 namespace AL {
 
 Sound::Sound():
-       data(0)
+       data(0),
+       eof_flag(false)
 {
        ovfile.datasource=0;
 }
 
 Sound::~Sound()
 {
+       delete[] data;
        if(ovfile.datasource)
                ov_clear(&ovfile);
 }
 
-void Sound::open(const string &fn)
+void Sound::open_file(const string &fn)
 {
+       if(ovfile.datasource)
+               throw InvalidState("Sound has already been opened");
        if(ov_fopen(const_cast<char *>(fn.c_str()), &ovfile)<0)
                throw Exception("Could not open ogg vorbis file "+fn);
 
-       vorbis_info *info=ov_info(&ovfile, -1);
-       freq=info->rate;
-       switch(info->channels)
+       open_common();
+}
+
+void Sound::open_memory(const void *d, unsigned len)
+{
+       if(ovfile.datasource)
+               throw InvalidState("Sound has already been opened");
+
+       MemorySource *src=new MemorySource(d, len);
+       if(ov_open_callbacks(src, &ovfile, 0, 0, memory_callbacks)<0)
        {
-       case 1: format=MONO16; break;
-       case 2: format=STEREO16; break;
-       default: throw Exception("Unsupported number of channels");
+               delete src;
+               throw Exception("Could not open ogg vorbis memory block");
        }
+
+       open_common();
 }
 
 void Sound::load_data()
@@ -46,17 +115,64 @@ void Sound::load_data()
                throw InvalidState("Data has already been loaded");
 
        size=ov_pcm_total(&ovfile, 0)*4;
-       data=new char[size];
+       char *dptr=new char[size];
        unsigned pos=0;
-       while(unsigned len=read(data+pos, size-pos))
+       while(unsigned len=read(dptr+pos, size-pos))
                pos+=len;
+       data=dptr;
        size=pos;
+       read_pos=0;
+}
+
+void Sound::load_file(const std::string &fn)
+{
+       open_file(fn);
+       load_data();
+       close();
 }
 
-void Sound::load(const string &fn)
+void Sound::load_memory(const void *d, unsigned len)
 {
-       open(fn);
+       open_memory(d, len);
        load_data();
+       close();
+}
+
+void Sound::close()
+{
+       if(ovfile.datasource)
+               ov_clear(&ovfile);
+}
+
+void Sound::rewind()
+{
+       if(data)
+               read_pos=0;
+       else
+               ov_pcm_seek(&ovfile, 0);
+}
+
+unsigned Sound::read(char *buf, unsigned len)
+{
+       if(data)
+       {
+               len=min(len, size-read_pos);
+               memcpy(buf, data+read_pos, len);
+               read_pos+=len;
+               return len;
+       }
+       else if(ovfile.datasource)
+       {
+               int section=0;
+               int res=ov_read(&ovfile, buf, len, 0, 2, 1, &section);
+               if(res<0)
+                       throw Exception("Error reading ogg vorbis file");
+               else if(res==0)
+                       eof_flag=true;
+               return res;
+       }
+       else
+               throw InvalidState("No data available");
 }
 
 const char *Sound::get_data() const
@@ -66,13 +182,19 @@ const char *Sound::get_data() const
        return data;
 }
 
-unsigned Sound::read(char *buf, unsigned len)
+void Sound::open_common()
 {
-       int section=0;
-       int res=ov_read(&ovfile, buf, len, 0, 2, 1, &section);
-       if(res<0)
-               throw Exception("Error reading ogg vorbis file");
-       return res;
+       delete data;
+       data=0;
+
+       vorbis_info *info=ov_info(&ovfile, -1);
+       freq=info->rate;
+       switch(info->channels)
+       {
+       case 1: format=MONO16; break;
+       case 2: format=STEREO16; break;
+       default: throw Exception("Unsupported number of channels");
+       }
 }
 
 } // namespace AL