SharedPtr<Decoder> Mpg123DecoderFactory::createDecoder(SharedPtr<std::istream> file)
{
if(!mIsInited)
return SharedPtr<Decoder>(nullptr);
mpg123_handle *mpg123 = mpg123_new(0, 0);
if(mpg123)
{
if(mpg123_replace_reader_handle(mpg123, r_read, r_lseek, 0) == MPG123_OK &&
mpg123_open_handle(mpg123, file.get()) == MPG123_OK)
{
int enc, channels;
long srate;
if(mpg123_getformat(mpg123, &srate, &channels, &enc) == MPG123_OK)
{
if((channels == 1 || channels == 2) && srate > 0 &&
mpg123_format_none(mpg123) == MPG123_OK &&
mpg123_format(mpg123, srate, channels, MPG123_ENC_SIGNED_16) == MPG123_OK)
{
// All OK
return SharedPtr<Decoder>(new Mpg123Decoder(file, mpg123, channels, srate));
}
}
mpg123_close(mpg123);
}
mpg123_delete(mpg123);
}
return SharedPtr<Decoder>(nullptr);
}
bool Mpg123Decoder::IsMp3(FILE* stream) {
Mpg123Decoder decoder;
// Prevent stream handle destruction
mpg123_replace_reader_handle(decoder.handle.get(), custom_read, custom_seek, noop_close);
// Prevent skipping of too many garbage, breaks heuristic
mpg123_param(decoder.handle.get(), MPG123_RESYNC_LIMIT, 64, 0.0);
if (!decoder.Open(stream)) {
return false;
}
unsigned char buffer[1024];
int err = 0;
size_t done = 0;
int err_count = 0;
// Read beginning of assumed MP3 file and count errors as an heuristic to detect MP3
for (int i = 0; i < 10; ++i) {
err = mpg123_read(decoder.handle.get(), buffer, 1024, &done);
if (err != MPG123_OK) {
err_count += 1;
}
if (err_count >= 3) {
break;
}
}
return err_count < 3;
}
Mpg123Decoder::Mpg123Decoder(Data *data, const std::string &ext, int bufferSize)
: Decoder(data, ext, bufferSize)
, decoder_file(data)
, handle(0)
, channels(MPG123_STEREO)
, duration(-2.0)
{
int ret = 0;
if (!inited)
{
ret = mpg123_init();
if (ret != MPG123_OK)
throw love::Exception("Could not initialize mpg123.");
inited = (ret == MPG123_OK);
}
// Intialize the handle.
handle = mpg123_new(nullptr, nullptr);
if (handle == nullptr)
throw love::Exception("Could not create decoder.");
// Suppressing all mpg123 messages.
mpg123_param(handle, MPG123_ADD_FLAGS, MPG123_QUIET, 0);
try
{
ret = mpg123_replace_reader_handle(handle, &read_callback, &seek_callback, &cleanup_callback);
if (ret != MPG123_OK)
throw love::Exception("Could not set decoder callbacks.");
ret = mpg123_open_handle(handle, &decoder_file);
if (ret != MPG123_OK)
throw love::Exception("Could not open decoder.");
// mpg123_getformat should be able to tell us the properties of the stream's first frame.
long rate = 0;
ret = mpg123_getformat(handle, &rate, &channels, nullptr);
if (ret == MPG123_ERR)
throw love::Exception("Could not get stream information.");
// I forgot what this was about.
if (channels == 0)
channels = 2;
// Force signed 16-bit output.
mpg123_param(handle, MPG123_FLAGS, (channels == 2 ? MPG123_FORCE_STEREO : MPG123_MONO_MIX), 0);
mpg123_format_none(handle);
mpg123_format(handle, rate, channels, MPG123_ENC_SIGNED_16);
sampleRate = rate;
}
catch (love::Exception &)
{
mpg123_delete(handle);
throw;
}
}
AudioSourceMpg123::AudioSourceMpg123(const char* filename) : AudioSource(filename)
{
rate_ = 0;
channelCount_ = 0;
sampleCount_ = 0;
int err = MPG123_OK;
mpg123_handle* mh = mpg123_new(NULL, &err);
if (mh == NULL || err != MPG123_OK)
return;
/* if (mpg123_open(mh, filename) != MPG123_OK)
{
mpg123_delete(mh);
return;
} */
G_FILE* file = g_fopen(filename, "rb");
if (file == NULL)
{
mpg123_delete(mh);
return;
}
mpg123_replace_reader_handle(mh, mpg123read, mpg123lseek, mpg123cleanup);
if (mpg123_open_handle(mh, file) != MPG123_OK)
{
mpg123_delete(mh);
return;
}
int channels = 0, encoding = 0;
long rate = 0;
if (mpg123_getformat(mh, &rate, &channels, &encoding) != MPG123_OK)
{
mpg123_delete(mh);
return;
}
// Signed 16 is the default output format anyways (encoding == MPG123_ENC_SIGNED_16);
// it would actually by only different if we forced it.
// Ensure that this output format will not change (it could, when we allow it).
mpg123_format_none(mh);
mpg123_format(mh, rate, channels, encoding);
rate_ = rate;
channelCount_ = channels;
mpg123_scan(mh);
sampleCount_ = mpg123_length(mh);
mpg123_close(mh);
mpg123_delete(mh);
}
AudioStreamerMpg123::AudioStreamerMpg123(AudioSourceMpg123* source, int loops) : AudioStreamer(source, loops)
{
handle_ = NULL;
int err = MPG123_OK;
mpg123_handle* mh = mpg123_new(NULL, &err);
if (mh == NULL || err != MPG123_OK)
return;
/* if (mpg123_open(mh, source->fileName()) != MPG123_OK)
{
mpg123_delete(mh);
return;
}*/
G_FILE* file = g_fopen(source->fileName(), "rb");
if (file == NULL)
{
mpg123_delete(mh);
return;
}
mpg123_replace_reader_handle(mh, mpg123read, mpg123lseek, mpg123cleanup);
if (mpg123_open_handle(mh, file) != MPG123_OK)
{
mpg123_delete(mh);
return;
}
int channels = 0, encoding = 0;
long rate = 0;
if (mpg123_getformat(mh, &rate, &channels, &encoding) != MPG123_OK)
{
mpg123_delete(mh);
return;
}
// Signed 16 is the default output format anyways (encoding == MPG123_ENC_SIGNED_16);
// it would actually by only different if we forced it.
// Ensure that this output format will not change (it could, when we allow it).
mpg123_format_none(mh);
mpg123_format(mh, rate, channels, encoding);
handle_ = mh;
}
Mpg123Decoder::Mpg123Decoder() :
handle(nullptr, mpg123_delete)
{
music_type = "mp3";
err = mpg123_init();
if (err != MPG123_OK) {
error_message = "mpg123: " + std::string(mpg123_plain_strerror(err));
return;
}
handle.reset(mpg123_new(nullptr, &err));
mpg123_replace_reader_handle(handle.get(), custom_read, custom_seek, custom_close);
if (!handle) {
error_message = "mpg123: " + std::string(mpg123_plain_strerror(err));
return;
}
init = true;
}
bool MPG123Decoder::open(FileReader &reader)
{
if(!inited)
{
if (!IsMPG123Present()) return false;
if(mpg123_init() != MPG123_OK) return false;
inited = true;
}
Reader = std::move(reader);
{
MPG123 = mpg123_new(NULL, NULL);
if(mpg123_replace_reader_handle(MPG123, file_read, file_lseek, NULL) == MPG123_OK &&
mpg123_open_handle(MPG123, this) == MPG123_OK)
{
int enc, channels;
long srate;
if(mpg123_getformat(MPG123, &srate, &channels, &enc) == MPG123_OK)
{
if((channels == 1 || channels == 2) && srate > 0 &&
mpg123_format_none(MPG123) == MPG123_OK &&
mpg123_format(MPG123, srate, channels, MPG123_ENC_SIGNED_16) == MPG123_OK)
{
// All OK
Done = false;
return true;
}
}
mpg123_close(MPG123);
}
mpg123_delete(MPG123);
MPG123 = 0;
}
reader = std::move(Reader); // need to give it back.
return false;
}
bool Mp3Decoder::open( Downloader* downloader )
{
_handle = mpg123_new(NULL, NULL);
if(_handle == NULL)
{
printf("mpg123_new failed\n");
return false;
}
mpg123_replace_reader_handle(_handle, g_read, NULL, NULL);
int res = mpg123_param(_handle, MPG123_FLAGS, MPG123_FUZZY | MPG123_SEEKBUFFER | MPG123_GAPLESS, 0);
assert(res == MPG123_OK);
res = mpg123_open_handle(_handle, downloader);
if(res != MPG123_OK)
{
printf("mpg123_open_handle failed\n");
return false;
}
_downloader = downloader;
return afterOpen();
}
bool DecoderMPG123::initialize()
{
if (input()->isSequential ()) //for streams only
{
TagExtractor extractor(input());
if(!extractor.id3v2tag().isEmpty())
addMetaData(extractor.id3v2tag());
}
int err = mpg123_init();
if(err != MPG123_OK)
{
qWarning("DecoderMPG123: basic setup goes wrong: %s", mpg123_plain_strerror(err));
return false;
}
int channels = 0;
if(!(m_handle = mpg123_new(0, &err)))
{
qWarning("DecoderMPG123: basic setup goes wrong: %s", mpg123_plain_strerror(err));
return false;
}
mpg123_param (m_handle, MPG123_ADD_FLAGS, MPG123_SEEKBUFFER | MPG123_FUZZY, 0);
if((err = mpg123_replace_reader_handle(m_handle, mpg123_read_cb, mpg123_seek_cb, 0)) != MPG123_OK)
{
qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
cleanup(m_handle);
m_handle = 0;
return false;
}
setMPG123Format(MPG123_ENC_FLOAT_32);
if((err = mpg123_open_handle(m_handle, this)) != MPG123_OK)
{
qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
cleanup(m_handle);
m_handle = 0;
return false;
}
if((err = mpg123_getformat(m_handle, &m_rate, &channels, &m_mpg123_encoding)) != MPG123_OK)
{
qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
cleanup(m_handle);
m_handle = 0;
return false;
}
//check format
if(m_mpg123_encoding != MPG123_ENC_FLOAT_32)
{
cleanup(m_handle);
qWarning("DecoderMPG123: bad encoding: 0x%x!\n", m_mpg123_encoding);
m_handle = 0;
return false;
}
if(!input()->isSequential())
{
if((err = mpg123_scan(m_handle)) != MPG123_OK)
qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
//duration
m_totalTime = (qint64) mpg123_length(m_handle) * 1000 / m_rate;
}
else
m_totalTime = 0;
configure(m_rate, channels, Qmmp::PCM_FLOAT);
return true;
}
g_id gaudio_Mp3Open(const char *fileName, int *numChannels, int *sampleRate, int *bitsPerSample, int *numSamples, gaudio_Error *error)
{
int err = MPG123_OK;
mpg123_handle *mh = mpg123_new(NULL, &err);
if (mh == NULL || err != MPG123_OK)
{
if (error)
*error = GAUDIO_INTERNAL_ERROR;
return 0;
}
G_FILE *file = g_fopen(fileName, "rb");
if (file == NULL)
{
mpg123_delete(mh);
if (error)
*error = GAUDIO_CANNOT_OPEN_FILE;
return 0;
}
mpg123_replace_reader_handle(mh, mpg123read, mpg123lseek, mpg123cleanup);
if (mpg123_open_handle(mh, file) != MPG123_OK)
{
mpg123_delete(mh);
if (error)
*error = GAUDIO_UNRECOGNIZED_FORMAT;
return 0;
}
int channels = 0, encoding = 0;
long rate = 0;
if (mpg123_getformat(mh, &rate, &channels, &encoding) != MPG123_OK)
{
mpg123_delete(mh);
if (error)
*error = GAUDIO_UNRECOGNIZED_FORMAT;
return 0;
}
// although signed 16 is the default output format, we ensure that anyway.
encoding = MPG123_ENC_SIGNED_16;
mpg123_format_none(mh);
mpg123_format(mh, rate, channels, encoding);
mpg123_scan(mh);
off_t sampleCount = mpg123_length(mh);
if (numChannels)
*numChannels = channels;
if (sampleRate)
*sampleRate = rate;
if (bitsPerSample)
*bitsPerSample = 16;
if (numSamples)
*numSamples = sampleCount;
if (error)
*error = GAUDIO_NO_ERROR;
GGMp3Handle *handle = new GGMp3Handle();
handle->mh = mh;
handle->sampleSize = channels * 2;
return (g_id)handle;
}
static snd_stream_t *S_MP3_CodecOpenStream (const char *filename)
{
snd_stream_t *stream;
long rate = 0;
int encoding = 0, channels = 0;
mp3_priv_t *priv = NULL;
stream = S_CodecUtilOpen(filename, &mp3_codec);
if (!stream)
return NULL;
stream->priv = Z_Malloc(sizeof(mp3_priv_t));
priv = (mp3_priv_t *) stream->priv;
priv->handle = mpg123_new(NULL, NULL);
if (priv->handle == NULL)
{
Con_Printf("Unable to allocate mpg123 handle\n");
goto _fail;
}
priv->handle_newed = 1;
if (mpg123_replace_reader_handle(priv->handle, mp3_read, mp3_seek, NULL) != MPG123_OK ||
mpg123_open_handle(priv->handle, &stream->fh) != MPG123_OK)
{
Con_Printf("Unable to open mpg123 handle\n");
goto _fail;
}
priv->handle_opened = 1;
if (mpg123_getformat(priv->handle, &rate, &channels, &encoding) != MPG123_OK)
{
Con_Printf("Unable to retrieve mpg123 format for %s\n", filename);
goto _fail;
}
switch (channels)
{
case MPG123_MONO:
stream->info.channels = 1;
break;
case MPG123_STEREO:
stream->info.channels = 2;
break;
default:
Con_Printf("Unsupported number of channels %d in %s\n", channels, filename);
goto _fail;
}
stream->info.rate = rate;
switch (encoding)
{
case MPG123_ENC_UNSIGNED_8:
stream->info.width = 1;
break;
case MPG123_ENC_SIGNED_8:
/* unsupported: force mpg123 to convert */
stream->info.width = 1;
encoding = MPG123_ENC_UNSIGNED_8;
break;
case MPG123_ENC_SIGNED_16:
stream->info.width = 2;
break;
case MPG123_ENC_UNSIGNED_16:
default:
/* unsupported: force mpg123 to convert */
stream->info.width = 2;
encoding = MPG123_ENC_SIGNED_16;
break;
}
if (mpg123_format_support(priv->handle, rate, encoding) == 0)
{
Con_Printf("Unsupported format for %s\n", filename);
goto _fail;
}
mpg123_format_none(priv->handle);
mpg123_format(priv->handle, rate, channels, encoding);
return stream;
_fail:
if (priv)
{
if (priv->handle_opened)
mpg123_close(priv->handle);
if (priv->handle_newed)
mpg123_delete(priv->handle);
Z_Free(stream->priv);
}
S_CodecUtilClose(&stream);
return NULL;
}