Make sound format support optional

[libs/al.git] / source / mp3decoder.cpp

diff --git a/source/mp3decoder.cpp b/source/mp3decoder.cpp
deleted file mode 100644 (file)
index cc32356..0000000
--- a/source/mp3decoder.cpp
+++ /dev/null
@@ -1,191 +0,0 @@
-#include <limits>
-#include <mad.h>
-#include <msp/strings/format.h>
-#include "mp3decoder.h"
-
-using namespace std;
-
-namespace {
-
-Msp::Int16 scale(mad_fixed_t sample)
-{
-       if(sample<=-MAD_F_ONE)
-               return numeric_limits<Msp::Int16>::min();
-       else if(sample>=MAD_F_ONE)
-               return numeric_limits<Msp::Int16>::max();
-       else
-               return (sample + (1<<(MAD_F_FRACBITS-16))) >> (MAD_F_FRACBITS-15);
-}
-
-} // namespace
-
-
-namespace Msp {
-namespace AL {
-
-mp3_error::mp3_error(const std::string &func, int err):
-       runtime_error(format("%s: %s", func, get_message(err)))
-{ }
-
-string mp3_error::get_message(int err)
-{
-       return format("%d", err);
-}
-
-
-struct Mp3Decoder::Private
-{
-       mad_stream stream;
-       mad_frame frame;
-       mad_synth synth;
-};
-
-
-Mp3Decoder::Mp3Decoder(IO::Seekable &io):
-       priv(new Private),
-       in(io),
-       in_buf_size(16384),
-       in_buffer(new char[in_buf_size]),
-       read_pos(0)
-{
-       mad_stream_init(&priv->stream);
-       mad_frame_init(&priv->frame);
-       mad_synth_init(&priv->synth);
-
-       try
-       {
-               if(!fill_input() || !decode(false))
-                       throw runtime_error("no mp3 data");
-
-               format = create_format(2, MAD_NCHANNELS(&priv->frame.header));
-               freq = priv->frame.header.samplerate;
-       }
-       catch(...)
-       {
-               delete[] in_buffer;
-               throw;
-       }
-}
-
-Mp3Decoder::~Mp3Decoder()
-{
-       delete[] in_buffer;
-       mad_synth_finish(&priv->synth);
-       mad_frame_finish(&priv->frame);
-       mad_stream_finish(&priv->stream);
-       delete priv;
-}
-
-bool Mp3Decoder::detect(const string &sig)
-{
-       if(sig.size()>=2 && sig[0]=='\xFF' && (sig[1]&0xE0)==0xE0)
-               return true;
-
-       static const char id3_sig[] = { 'I', 'D', '3' };
-       if(sig.size()<sizeof(id3_sig))
-               return false;
-       return !sig.compare(0, sizeof(id3_sig), id3_sig, sizeof(id3_sig));
-}
-
-void Mp3Decoder::seek(unsigned pos)
-{
-       unsigned unit = get_unit_size(format);
-       pos /= unit;
-
-       in.seek(0, IO::S_BEG);
-       mad_stream_buffer(&priv->stream, 0, 0);
-       fill_input();
-       if(!pos)
-       {
-               priv->synth.pcm.length = 0;
-               return;
-       }
-
-       while(decode(false))
-       {
-               unsigned frame_len = 32*MAD_NSBSAMPLES(&priv->frame.header);
-               if(frame_len>pos)
-               {
-                       decode(true);
-                       read_pos = pos;
-                       break;
-               }
-
-               pos -= frame_len;
-       }
-}
-
-unsigned Mp3Decoder::read(char *buf, unsigned len)
-{
-       unsigned nchan = get_n_channels(format);
-       mad_pcm &pcm = priv->synth.pcm;
-
-       unsigned pos = 0;
-       while(pos+2*nchan<=len)
-       {
-               if(read_pos>=pcm.length && !decode(true))
-                       break;
-
-               for(unsigned i=0; i<nchan; ++i)
-               {
-                       Int16 sample = scale(pcm.samples[i][read_pos]);
-                       buf[pos++] = sample;
-                       buf[pos++] = sample>>8;
-               }
-
-               ++read_pos;
-       }
-
-       return pos;
-}
-
-bool Mp3Decoder::fill_input()
-{
-       unsigned in_pos = 0;
-       if(priv->stream.next_frame && priv->stream.next_frame<priv->stream.bufend)
-       {
-               copy(priv->stream.next_frame, priv->stream.bufend, in_buffer);
-               in_pos = priv->stream.bufend-priv->stream.next_frame;
-       }
-
-       unsigned len = in.read(in_buffer+in_pos, in_buf_size-in_pos);
-       in_pos += len;
-
-       mad_stream_buffer(&priv->stream, reinterpret_cast<unsigned char *>(in_buffer), in_pos);
-       priv->stream.error = MAD_ERROR_NONE;
-
-       return len;
-}
-
-bool Mp3Decoder::try_decode(bool full)
-{
-       if(full)
-               return !mad_frame_decode(&priv->frame, &priv->stream);
-       else
-               return !mad_header_decode(&priv->frame.header, &priv->stream);
-}
-
-bool Mp3Decoder::decode(bool full)
-{
-       while(!try_decode(full))
-       {
-               if(priv->stream.error==MAD_ERROR_BUFLEN)
-               {
-                       if(!fill_input())
-                               return false;
-               }
-               else if(!MAD_RECOVERABLE(priv->stream.error))
-                       throw mp3_error("mad_frame_decode", priv->stream.error);
-       }
-
-       if(full)
-       {
-               read_pos = 0;
-               mad_synth_frame(&priv->synth, &priv->frame);
-       }
-
-       return true;
-}
-
-} // namespace AL
-} // namespace Msp