bool CodecMpeg1::LoadLibmad()
{
#ifdef HAVE_LIBMAD
if((mpeg1_mad_handle=dlopen("libmad.so",RTLD_NOW))!=NULL) {
//
// Initialize Library
//
*(void **)(&mad_stream_init)=dlsym(mpeg1_mad_handle,"mad_stream_init");
*(void **)(&mad_frame_init)=dlsym(mpeg1_mad_handle,"mad_frame_init");
*(void **)(&mad_synth_init)=dlsym(mpeg1_mad_handle,"mad_synth_init");
*(void **)(&mad_stream_buffer)=dlsym(mpeg1_mad_handle,"mad_stream_buffer");
*(void **)(&mad_frame_decode)=dlsym(mpeg1_mad_handle,"mad_frame_decode");
*(void **)(&mad_header_decode)=dlsym(mpeg1_mad_handle,"mad_header_decode");
*(void **)(&mad_synth_frame)=dlsym(mpeg1_mad_handle,"mad_synth_frame");
*(void **)(&mad_frame_mute)=dlsym(mpeg1_mad_handle,"mad_frame_mute");
*(void **)(&mad_synth_mute)=dlsym(mpeg1_mad_handle,"mad_synth_mute");
*(void **)(&mad_stream_sync)=dlsym(mpeg1_mad_handle,"mad_stream_sync");
*(void **)(&mad_frame_finish)=dlsym(mpeg1_mad_handle,"mad_frame_finish");
*(void **)(&mad_stream_finish)=dlsym(mpeg1_mad_handle,"mad_stream_finish");
*(void **)(&mad_header_init)=dlsym(mpeg1_mad_handle,"mad_header_init");
//
// Initialize Instance
//
mad_stream_init(&mpeg1_mad_stream);
mad_synth_init(&mpeg1_mad_synth);
mad_frame_init(&mpeg1_mad_frame);
memset(&mpeg1_mad_header,0,sizeof(mpeg1_mad_header));
return true;
}
#endif // HAVE_LIBMAD
return false;
}
static audio_decoder_t *open_plugin (audio_decoder_class_t *class_gen, xine_stream_t *stream) {
mad_decoder_t *this ;
this = (mad_decoder_t *) calloc(1, sizeof(mad_decoder_t));
this->audio_decoder.decode_data = mad_decode_data;
this->audio_decoder.reset = mad_reset;
this->audio_decoder.discontinuity = mad_discontinuity;
this->audio_decoder.dispose = mad_dispose;
this->output_open = 0;
this->bytes_in_buffer = 0;
this->preview_mode = 0;
this->xstream = stream;
mad_synth_init (&this->synth);
mad_stream_init (&this->stream);
mad_frame_init (&this->frame);
this->stream.options = MAD_OPTION_IGNORECRC;
lprintf ("init\n");
return &this->audio_decoder;
}
static audio_decoder_t *open_plugin (audio_decoder_class_t *class_gen, xine_stream_t *stream) {
mad_decoder_t *this ;
this = (mad_decoder_t *) malloc (sizeof (mad_decoder_t));
this->audio_decoder.decode_data = mad_decode_data;
this->audio_decoder.reset = mad_reset;
this->audio_decoder.discontinuity = mad_discontinuity;
this->audio_decoder.dispose = mad_dispose;
this->output_open = 0;
this->bytes_in_buffer = 0;
this->preview_mode = 0;
this->xstream = stream;
mad_synth_init (&this->synth);
mad_stream_init (&this->stream);
mad_frame_init (&this->frame);
#ifdef LOG
printf ("libmad: init\n");
#endif
return &this->audio_decoder;
}
void
mp3_mad_init (mp3_info_t *info) {
mad_stream_init(&info->mad_stream);
mad_stream_options (&info->mad_stream, MAD_OPTION_IGNORECRC);
mad_frame_init(&info->mad_frame);
mad_synth_init(&info->mad_synth);
}
size_t MadDecoder::start(FILE* handle)
{
handle_ = handle;
decodeBuffer_.resize(bufferSize_, false);
ASSERT(decodeBuffer_.size() == bufferSize_);
unsigned char* buffer = decodeBuffer_.getHead();
int64 durationMsec = getDurationMs(buffer, bufferSize_);
mad_stream_init(&madStream_);
mad_frame_init(&madFrame_);
mad_synth_init(&madSynth_);
mad_timer_reset(&madTimer_);
// Decode at least one valid frame to find out the input format.
// The decoded frame will be saved off so that it can be processed later.
//
size_t bytesRead = fread(buffer, (size_t)1, bufferSize_, handle_);
if (bytesRead != bufferSize_ && ferror(handle_))
THROW(std::exception, "%s", strerror(errno));
mad_stream_buffer(&madStream_, buffer, bytesRead);
// Find a valid frame before starting up.
// This make sure that we have a valid MP3
// and also skips past ID3v2 tags at the beginning of the audio file.
//
madStream_.error = MAD_ERROR_NONE;
while (mad_frame_decode(&madFrame_, &madStream_))
{
// check whether input buffer needs a refill
if (madStream_.error == MAD_ERROR_BUFLEN) {
if (readMpgFile() == false) break; // eof
else continue;
}
consumeId3Tag(); // consume any ID3 tags
// FIXME: We should probably detect when we've read
// a bunch of non-ID3 data and still haven't found a
// frame. In that case we can abort early without
// scanning the whole file.
//
madStream_.error = MAD_ERROR_NONE;
}
if (madStream_.error) {
THROW(std::exception, "No valid MP3 frame found");
}
mad_timer_add(&madTimer_, madFrame_.header.duration);
mad_synth_frame(&madSynth_, &madFrame_);
//unsigned int precision_ = 16;
currentFrame_ = 0;
numMpegFrames_ = 0;
initialized_ = true;
return (size_t)(durationMsec * .001 * getSampleRate() + .5); // number of sample frames
}
static void
mp3_data_init(struct mp3_data *data, struct decoder *decoder,
struct input_stream *input_stream)
{
data->mute_frame = MUTEFRAME_NONE;
data->highest_frame = 0;
data->max_frames = 0;
data->frame_offsets = NULL;
data->times = NULL;
data->current_frame = 0;
data->drop_start_frames = 0;
data->drop_end_frames = 0;
data->drop_start_samples = 0;
data->drop_end_samples = 0;
data->found_xing = false;
data->found_first_frame = false;
data->decoded_first_frame = false;
data->decoder = decoder;
data->input_stream = input_stream;
data->layer = 0;
mad_stream_init(&data->stream);
mad_stream_options(&data->stream, MAD_OPTION_IGNORECRC);
mad_frame_init(&data->frame);
mad_synth_init(&data->synth);
mad_timer_reset(&data->timer);
}
static void *mp3_open_stream (struct io_stream *stream)
{
struct mp3_data *data;
data = (struct mp3_data *)xmalloc (sizeof(struct mp3_data));
data->ok = 1;
decoder_error_init (&data->error);
/* Reset information about the file */
data->freq = 0;
data->channels = 0;
data->skip_frames = 0;
data->bitrate = -1;
data->io_stream = stream;
data->duration = -1;
data->size = (off_t)-1;
mad_stream_init (&data->stream);
mad_frame_init (&data->frame);
mad_synth_init (&data->synth);
if (options_get_int("Mp3IgnoreCRCErrors"))
mad_stream_options (&data->stream,
MAD_OPTION_IGNORECRC);
return data;
}
uint8_t ADM_AudiocodecMP3::beginDecompress( void )
{
mad_stream_init(Stream);
mad_frame_init(Frame);
mad_synth_init(Synth);
_head=_tail=0;
return 1;
}
static void
init_mad_decoder (mp3d_prc_t * ap_prc)
{
assert (ap_prc);
mad_stream_init (&ap_prc->stream_);
mad_frame_init (&ap_prc->frame_);
mad_synth_init (&ap_prc->synth_);
mad_timer_reset (&ap_prc->timer_);
}
static struct mp3_data *mp3_open_internal (const char *file,
const int buffered)
{
struct mp3_data *data;
data = (struct mp3_data *)xmalloc (sizeof(struct mp3_data));
data->ok = 0;
decoder_error_init (&data->error);
/* Reset information about the file */
data->freq = 0;
data->channels = 0;
data->skip_frames = 0;
data->bitrate = -1;
data->avg_bitrate = -1;
/* Open the file */
data->io_stream = io_open (file, buffered);
if (io_ok(data->io_stream)) {
data->ok = 1;
data->size = io_file_size (data->io_stream);
mad_stream_init (&data->stream);
mad_frame_init (&data->frame);
mad_synth_init (&data->synth);
if (options_get_int("Mp3IgnoreCRCErrors"))
mad_stream_options (&data->stream,
MAD_OPTION_IGNORECRC);
data->duration = count_time_internal (data);
mad_frame_mute (&data->frame);
data->stream.next_frame = NULL;
data->stream.sync = 0;
data->stream.error = MAD_ERROR_NONE;
if (io_seek(data->io_stream, SEEK_SET, 0) == (off_t)-1) {
decoder_error (&data->error, ERROR_FATAL, 0,
"seek failed");
io_close (data->io_stream);
mad_stream_finish (&data->stream);
mad_frame_finish (&data->frame);
mad_synth_finish (&data->synth);
data->ok = 0;
}
data->stream.error = MAD_ERROR_BUFLEN;
}
else {
decoder_error (&data->error, ERROR_FATAL, 0, "Can't open: %s",
io_strerror(data->io_stream));
io_close (data->io_stream);
}
return data;
}
static void mad_init_decoder(struct mad_local_data *data)
{
if (!data)
return;
mad_synth_init (&data->synth);
mad_stream_init (&data->stream);
mad_frame_init (&data->frame);
}
static int mp_init (int samplerate)
{
mad_stream_init (&Stream);
mad_frame_init (&Frame);
mad_synth_init (&Synth);
mad_header_init (&Header);
mp_samplerate_target = samplerate;
return 1;
}
void mpgDecoder::reset( )
{
#ifdef HAVE_MAD
madFile->reset();
mad_timer_reset( currentPositionTimer );
mad_stream_init( madStream );
mad_frame_init( madFrame );
frameCounter = 0;
#endif
}
MADDecoder::MADDecoder() :
stereo(false),
bytes_per_frame(0),
rate(0),
sample(0)
{
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
}
void MP3Decoder::mp3_init() {
if (!_isInited) {
/* libmad初始化 */
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
_isInited = true;
}
}
void XMp3Decomp::initMad()
{
finishMad();
m_isInitMad = true;
m_firstBuf = true;
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
mad_timer_reset(&Timer);
}
static int mp_init (music_player_t *music, int samplerate)
{
mp_player_t *mp = (mp_player_t*)music;
mad_stream_init (&mp->Stream);
mad_frame_init (&mp->Frame);
mad_synth_init (&mp->Synth);
mad_header_init (&mp->Header);
mp->mp_samplerate_target = samplerate;
return 1;
}
MADTranscode::MADTranscode() :
m_decodedBufferCapacity( 32 * 1024 ),
m_mpegInitialised( false )
{
qDebug() << "Initialising MAD Transcoding";
mad_stream_init( &stream );
mad_frame_init( &frame );
mad_synth_init( &synth );
timer = mad_timer_zero;
last_timer = mad_timer_zero;
}
void MP3_Init()
{
# ifndef LINUX_MODE
samplesInOutput = 0;
isPlaying = 0;
/* First the structures used by libmad must be initialized. */
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
mad_timer_reset(&Timer);
# endif
}
static void mp3_init (mp3_s *mp3)
{
mp3->out_ptr = mp3->out_buf;
mp3->out_buf_end = mp3->out_buf + BUF_SIZE;
mp3->frame_count = 0;
mp3->status = 0;
mp3->start = 0;
mad_stream_init (&mp3->stream);
mad_frame_init (&mp3->frame);
mad_synth_init (&mp3->synth);
mad_timer_reset (&mp3->timer);
}
static void
MP3_Restart()
{
memset(OutputBuffer, 0, OUTPUT_BUFFER_SIZE);
samplesInOutput = 0;
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
mad_timer_reset(&Timer);
MP3_getInfo();
}
madfile_t *mad_js_init() {
madfile_t *mf;
mf = malloc(sizeof(madfile_t));
mf->position = 0;
mad_stream_init(&mf->stream);
mad_frame_init(&mf->frame);
mad_synth_init(&mf->synth);
mf->buf = (unsigned char*)malloc(BUFFER_SIZE);
return mf;
}
bool ADM_AudiocodecMP3::resetAfterSeek( void )
{
mad_synth_finish(Synth);
mad_frame_finish(Frame);
mad_stream_finish(Stream);
mad_stream_init(Stream);
mad_frame_init(Frame);
mad_synth_init(Synth);
_head=_tail=0;
return 1;
}
bool CMpegAudioDecoder::OpenDecoder()
{
CloseDecoder();
mad_stream_init(&m_MadStream);
mad_frame_init(&m_MadFrame);
mad_synth_init(&m_MadSynth);
m_bInitialized = true;
m_bDecodeError = false;
return true;
}
static int preinit(sh_audio_t *sh){
mad_decoder_t *this = calloc(1, sizeof(mad_decoder_t));
sh->context = this;
mad_synth_init (&this->synth);
mad_stream_init (&this->stream);
mad_frame_init (&this->frame);
sh->audio_out_minsize=2*4608;
sh->audio_in_minsize=4096;
return 1;
}
Mp3Decoder::Mp3Decoder(const u8 * snd, int len)
: SoundDecoder(snd, len)
{
SoundType = SOUND_MP3;
ReadBuffer = NULL;
mad_timer_reset(&Timer);
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
if(!file_fd)
return;
OpenFile();
}
static void mad_reset (audio_decoder_t *this_gen) {
mad_decoder_t *this = (mad_decoder_t *) this_gen;
mad_synth_finish (&this->synth);
mad_frame_finish (&this->frame);
mad_stream_finish(&this->stream);
this->pts = 0;
this->bytes_in_buffer = 0;
this->preview_mode = 0;
mad_synth_init (&this->synth);
mad_stream_init (&this->stream);
mad_frame_init (&this->frame);
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...){
mad_decoder_t *this = sh->context;
// various optional functions you MAY implement:
switch(cmd){
case ADCTRL_RESYNC_STREAM:
this->have_frame=0;
mad_synth_init (&this->synth);
mad_stream_init (&this->stream);
mad_frame_init (&this->frame);
return CONTROL_TRUE;
case ADCTRL_SKIP_FRAME:
this->have_frame=read_frame(sh);
return CONTROL_TRUE;
}
return CONTROL_UNKNOWN;
}
int Mp3Decoder::Rewind()
{
mad_synth_finish(&Synth);
mad_frame_finish(&Frame);
mad_stream_finish(&Stream);
mad_timer_reset(&Timer);
mad_stream_init(&Stream);
mad_frame_init(&Frame);
mad_synth_init(&Synth);
SynthPos = 0;
GuardPtr = NULL;
if(!file_fd)
return -1;
return SoundDecoder::Rewind();
}
ADM_AudiocodecMP3::ADM_AudiocodecMP3( uint32_t fourcc,WAVHeader *info,uint32_t extraLength,uint8_t *extraData) : ADM_Audiocodec(fourcc)
{
if((fourcc!=WAV_MP3) && (fourcc!=WAV_MP2))
ADM_assert(0);
if(fourcc==WAV_MP2) printf("Mpeg1/2 audio codec created\n");
_stream=(void *)ADM_alloc(sizeof( mad_stream));
_frame=(void *)ADM_alloc(sizeof( mad_frame));
_synth=(void *)ADM_alloc(sizeof( mad_synth));
mad_stream_init(Stream);
mad_frame_init(Frame);
mad_synth_init(Synth);
_head=_tail=0;
}