ref: 2cff3a9f96eabd25287392db3454bdb40d14f4b2
dir: /plugins/winamp3/FAAD.cpp/
/*
cnv_FAAD - MP4-AAC decoder plugin for Winamp3
Copyright (C) 2002 Antonio Foranna
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author can be contacted at:
kreel@tiscali.it
*/
#include <windows.h>
#include <stdio.h>
#include <process.h>
#include "resource.h"
#include "faadwa3.h"
#include "cnv_FAAD.h"
#include "CRegistry.h"
#include "Defines.h"
// *********************************************************************************************
#define MAX_Channels 2
#define FAAD_STREAMSIZE (FAAD_MIN_STREAMSIZE*MAX_Channels)
/*
#define RAW 0
#define ADIF 1
#define ADTS 2
*/
// -----------------------------------------------------------------------------------------------
#define FREE_ARRAY(ptr) \
{ \
if(ptr) \
free(ptr); \
ptr=0; \
}
// *********************************************************************************************
int id3v2_tag(unsigned char *buffer)
{
if(StringComp((const char *)buffer, "ID3", 3) == 0)
{
unsigned long tagsize;
// high bit is not used
tagsize = (buffer[6] << 21) | (buffer[7] << 14) |
(buffer[8] << 7) | (buffer[9] << 0);
tagsize += 10;
return tagsize;
}
return 0;
}
// *********************************************************************************************
int GetAACTrack(MP4FileHandle infile)
{
// find AAC track
int i, rc;
int numTracks = MP4GetNumberOfTracks(infile, NULL, 0);
for (i = 0; i < numTracks; i++)
{
MP4TrackId trackId = MP4FindTrackId(infile, i, NULL, 0);
const char* trackType = MP4GetTrackType(infile, trackId);
if (!strcmp(trackType, MP4_AUDIO_TRACK_TYPE))
{
unsigned char *buff = NULL;
unsigned __int32 buff_size = 0;
mp4AudioSpecificConfig mp4ASC;
MP4GetTrackESConfiguration(infile, trackId, (unsigned __int8 **)&buff, &buff_size);
if (buff)
{
rc = AudioSpecificConfig(buff, buff_size, &mp4ASC);
free(buff);
if (rc < 0)
return -1;
return trackId;
}
}
}
// can't decode this
return -1;
}
// *********************************************************************************************
AacPcm::AacPcm()
{
mp4File=0;
aacFile=0;
hDecoder=0;
buffer=0;
bytes_read=0;
bps=16;
newpos_ms=-1;
seek_table=0;
seek_table_length=0;
FindBitrate=FALSE;
BlockSeeking=false;
}
// -----------------------------------------------------------------------------------------------
AacPcm::~AacPcm()
{
if(mp4File)
MP4Close(mp4File);
if(aacFile)
fclose(aacFile);
if(hDecoder)
faacDecClose(hDecoder);
FREE_ARRAY(buffer);
FREE_ARRAY(seek_table);
}
// *********************************************************************************************
#define STRING_MONO "%i kbit/s %i khz %i bps Mono"
#define STRING_STEREO "%i kbit/s %i khz %i bps Stereo"
#define SHOW_INFO() \
{ \
infos->setInfo(StringPrintf(Channels==1 ? STRING_MONO : STRING_STEREO, \
(int)file_info.bitrate/1000, (int)Samplerate/1000, (int)bps)); \
infos->setTitle(Std::filename(infos->getFilename())); \
infos->setLength(len_ms); \
}
// -----------------------------------------------------------------------------------------------
#define ERROR_getInfos(str) \
{ \
bytes_into_buffer=-1; \
if(str) \
infos->warning(str); \
return 1; \
}
// -----------------------------------------------------------------------------------------------
int AacPcm::getInfos(MediaInfo *infos)
{
if(!infos)
return 1;
if(hDecoder)
{
SHOW_INFO()
return 0;
}
IsAAC=strcmpi(infos->getFilename()+lstrlen(infos->getFilename())-4,".aac")==0;
if(!IsAAC) // MP4 file ---------------------------------------------------------------------
{
MP4Duration length;
unsigned __int32 buffer_size;
mp4AudioSpecificConfig mp4ASC;
if(!(mp4File=MP4Read(infos->getFilename(), 0)))
ERROR_getInfos("Error opening file");
if((track=GetAACTrack(mp4File))<0)
ERROR_getInfos(0); //"Unable to find correct AAC sound track");
if(!(hDecoder=faacDecOpen()))
ERROR_getInfos("Error initializing decoder library");
MP4GetTrackESConfiguration(mp4File, track, (unsigned __int8 **)&buffer, &buffer_size);
if(!buffer)
ERROR_getInfos("MP4GetTrackESConfiguration");
AudioSpecificConfig(buffer, buffer_size, &mp4ASC);
Channels=mp4ASC.channelsConfiguration;
if(faacDecInit2(hDecoder, buffer, buffer_size, &Samplerate, &Channels) < 0)
ERROR_getInfos("Error initializing decoder library");
FREE_ARRAY(buffer);
length=MP4GetTrackDuration(mp4File, track);
len_ms=(DWORD)MP4ConvertFromTrackDuration(mp4File, track, length, MP4_MSECS_TIME_SCALE);
file_info.bitrate=MP4GetTrackBitRate(mp4File, track);
file_info.version=MP4GetTrackAudioType(mp4File, track)==MP4_MPEG4_AUDIO_TYPE ? 4 : 2;
numSamples=MP4GetTrackNumberOfSamples(mp4File, track);
sampleId=1;
}
else // AAC file ------------------------------------------------------------------------------
{
DWORD read,
tmp;
BYTE Channels4Raw=0;
if(!(aacFile=fopen(infos->getFilename(),"rb")))
ERROR_getInfos("Error opening file");
// use bufferized stream
setvbuf(aacFile,NULL,_IOFBF,32767);
// get size of file
fseek(aacFile, 0, SEEK_END);
src_size=ftell(aacFile);
fseek(aacFile, 0, SEEK_SET);
if(!(buffer=(BYTE *)malloc(FAAD_STREAMSIZE)))
ERROR_getInfos("Memory allocation error: buffer")
tmp=src_size<FAAD_STREAMSIZE ? src_size : FAAD_STREAMSIZE;
read=fread(buffer, 1, tmp, aacFile);
if(read==tmp)
{
bytes_read=read;
bytes_into_buffer=read;
}
else
ERROR_getInfos("Read failed!")
if(tagsize=id3v2_tag(buffer))
{
if(tagsize>(long)src_size)
ERROR_getInfos("Corrupt stream!");
if(tagsize<bytes_into_buffer)
{
bytes_into_buffer-=tagsize;
memcpy(buffer,buffer+tagsize,bytes_into_buffer);
}
else
{
bytes_read=tagsize;
bytes_into_buffer=0;
if(tagsize>bytes_into_buffer)
fseek(aacFile, tagsize, SEEK_SET);
}
if(src_size<bytes_read+FAAD_STREAMSIZE-bytes_into_buffer)
tmp=src_size-bytes_read;
else
tmp=FAAD_STREAMSIZE-bytes_into_buffer;
read=fread(buffer+bytes_into_buffer, 1, tmp, aacFile);
if(read==tmp)
{
bytes_read+=read;
bytes_into_buffer+=read;
}
else
ERROR_getInfos("Read failed!");
}
if(get_AAC_format((char *)infos->getFilename(), &file_info, &seek_table, &seek_table_length, 0))
ERROR_getInfos("get_AAC_format");
IsSeekable=file_info.headertype==ADTS && seek_table && seek_table_length>0;
BlockSeeking=!IsSeekable;
if(!(hDecoder=faacDecOpen()))
ERROR_getInfos("Can't open library");
if(file_info.headertype==RAW)
{
faacDecConfiguration config;
config.defSampleRate=atoi(cfg_samplerate);
switch(cfg_profile[1])
{
case 'a':
config.defObjectType=MAIN;
break;
case 'o':
config.defObjectType=LOW;
break;
case 'S':
config.defObjectType=SSR;
break;
case 'T':
config.defObjectType=LTP;
break;
}
switch(cfg_bps[0])
{
case '1':
config.outputFormat=FAAD_FMT_16BIT;
break;
case '2':
config.outputFormat=FAAD_FMT_24BIT;
break;
case '3':
config.outputFormat=FAAD_FMT_32BIT;
break;
case 'F':
config.outputFormat=FAAD_FMT_24BIT;
break;
}
faacDecSetConfiguration(hDecoder, &config);
if(!FindBitrate)
{
AacPcm *NewInst;
if(!(NewInst=new AacPcm()))
ERROR_getInfos("Memory allocation error: NewInst");
NewInst->FindBitrate=TRUE;
if(NewInst->getInfos(infos))
ERROR_getInfos(0);
Channels4Raw=NewInst->frameInfo.channels;
file_info.bitrate=NewInst->file_info.bitrate*Channels4Raw;
delete NewInst;
}
else
{
DWORD Samples,
BytesConsumed;
if((bytes_consumed=faacDecInit(hDecoder,buffer,bytes_into_buffer,&Samplerate,&Channels))<0)
ERROR_getInfos("Can't init library");
bytes_into_buffer-=bytes_consumed;
if(!processData(infos,0,0))
ERROR_getInfos(0);
Samples=frameInfo.samples/sizeof(short);
BytesConsumed=frameInfo.bytesconsumed;
processData(infos,0,0);
if(BytesConsumed<frameInfo.bytesconsumed)
BytesConsumed=frameInfo.bytesconsumed;
file_info.bitrate=(BytesConsumed*8*Samplerate)/Samples;
if(!file_info.bitrate)
file_info.bitrate=1000; // try to continue decoding
return 0;
}
}
if((bytes_consumed=faacDecInit(hDecoder, buffer, bytes_into_buffer, &Samplerate, &Channels))<0)
ERROR_getInfos("faacDecInit failed!")
bytes_into_buffer-=bytes_consumed;
if(Channels4Raw)
Channels=Channels4Raw;
len_ms=(DWORD)((1000*((float)src_size*8))/file_info.bitrate);
}
SHOW_INFO();
return 0;
}
// *********************************************************************************************
#define ERROR_processData(str) \
{ \
bytes_into_buffer=-1; \
if(str) \
infos->warning(str); \
if(chunk_list) \
chunk_list->setChunk("PCM", bufout, 0, ci); \
return 0; \
}
// -----------------------------------------------------------------------------------------------
int AacPcm::processData(MediaInfo *infos, ChunkList *chunk_list, bool *killswitch)
{
DWORD BytesDecoded=0;
char *bufout=0;
ChunkInfosI *ci=0;
svc_fileReader *reader=0;
if(!FindBitrate && !chunk_list)
ERROR_processData("chunk_list==NULL"); // is this case possible?
if(!(reader=infos->getReader()))
ERROR_processData("File doesn\'t exists");
if(chunk_list)
{
if(!(ci=new ChunkInfosI()))
ERROR_processData("Memory allocation error: ci");
ci->addInfo("srate", Samplerate);
ci->addInfo("bps", bps);
ci->addInfo("nch", Channels);
}
if(!IsAAC) // MP4 file --------------------------------------------------------------------------
{
unsigned __int32 buffer_size=0;
int rc;
if(newpos_ms>-1)
{
MP4Duration duration=MP4ConvertToTrackDuration(mp4File,track,newpos_ms,MP4_MSECS_TIME_SCALE);
sampleId=MP4GetSampleIdFromTime(mp4File,track,duration,0);
bytes_read=(DWORD)(((float)newpos_ms*file_info.bitrate)/(8*1000));
reader->seek(bytes_read); // updates slider
newpos_ms=-1;
}
do
{
buffer=NULL;
if(sampleId>=numSamples)
ERROR_processData(0);
rc=MP4ReadSample(mp4File, track, sampleId++, (unsigned __int8 **)&buffer, &buffer_size, NULL, NULL, NULL, NULL);
if(rc==0 || buffer==NULL)
{
FREE_ARRAY(buffer);
ERROR_processData("MP4ReadSample")
}
bufout=(char *)faacDecDecode(hDecoder,&frameInfo,buffer,buffer_size);
BytesDecoded=frameInfo.samples*sizeof(short);
FREE_ARRAY(buffer);
// to update the slider
bytes_read+=buffer_size;
reader->seek(bytes_read);
}while(!BytesDecoded && !frameInfo.error);
}
else // AAC file --------------------------------------------------------------------------
{
DWORD read,
tmp;
if(BlockSeeking)
{
infos->setLength(-1);
BlockSeeking=false;
}
if(newpos_ms>-1)
{
if(IsSeekable)
{
DWORD normalized=len_ms/(seek_table_length-1);
if(normalized<1000)
normalized=1000;
bytes_read=seek_table[newpos_ms/normalized];
fseek(aacFile, bytes_read, SEEK_SET);
reader->seek(bytes_read); // updates slider
bytes_into_buffer=0;
bytes_consumed=FAAD_STREAMSIZE;
}
newpos_ms=-1;
}
do
{
if(bytes_consumed>0 && bytes_into_buffer>=0)
{
if(bytes_into_buffer)
memcpy(buffer,buffer+bytes_consumed,bytes_into_buffer);
if(bytes_read<src_size)
{
if(bytes_read+bytes_consumed<src_size)
tmp=bytes_consumed;
else
tmp=src_size-bytes_read;
read=fread(buffer+bytes_into_buffer, 1, tmp, aacFile);
if(read==tmp)
{
bytes_read+=read;
bytes_into_buffer+=read;
}
else
infos->status("Read failed!"); // continue until bytes_into_buffer<1
}
else
if(bytes_into_buffer)
memset(buffer+bytes_into_buffer, 0, bytes_consumed);
bytes_consumed=0;
}
if(bytes_into_buffer<1)
if(bytes_read<src_size)
ERROR_processData("Buffer empty!")
else
ERROR_processData(0);
bufout=(char *)faacDecDecode(hDecoder,&frameInfo,buffer,bytes_into_buffer);
BytesDecoded=frameInfo.samples*sizeof(short);
bytes_consumed+=frameInfo.bytesconsumed;
bytes_into_buffer-=bytes_consumed;
// to update the slider
reader->seek(bytes_read-bytes_into_buffer+bytes_consumed); // updates slider
}while(!BytesDecoded && !frameInfo.error);
} // END AAC file --------------------------------------------------------------------------
if(frameInfo.error)
ERROR_processData((char *)faacDecGetErrorMessage(frameInfo.error));
if(chunk_list)
chunk_list->setChunk("PCM", bufout, BytesDecoded, ci);
return 1;
}