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Diffstat (limited to 'src/libapetag/info_mpc.c')
| -rwxr-xr-x | src/libapetag/info_mpc.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/libapetag/info_mpc.c b/src/libapetag/info_mpc.c new file mode 100755 index 0000000..18ee71b --- /dev/null +++ b/src/libapetag/info_mpc.c @@ -0,0 +1,198 @@ +/******************************************************************** +* +* Copyright (c) 2002 Artur Polaczynski (Ar't) All rights reserved. +* <artii@o2.pl> LGPL-2.1 +* $ArtId: info_mpc.c,v 1.12 2003/04/13 11:24:10 art Exp $ +********************************************************************/ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 + * of the License, or (at your option) any later version. + * + * 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +/* + Some portions of code or/and ideas come from + winamp plugins, xmms plugins, mppdec decoder + thanks: + -Frank Klemm <Frank.Klemm@uni-jena.de> + -Andree Buschmann <Andree.Buschmann@web.de> + -Thomas Juerges <thomas.juerges@astro.ruhr-uni-bochum.de> +*/ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "info_mpc.h" +#include "is_tag.h" + + +/* +*.MPC,*.MP+,*.MPP +*/ +static const char * +profile_stringify(unsigned int profile); // profile is 0...15, where 7...13 is used + + +static const char * +profile_stringify(unsigned int profile) // profile is 0...15, where 7...13 is used +{ + static const char na[] = "n.a."; + static const char *Names[] = { + na, "Experimental", na, na, + na, na, na, "Telephone", + "Thumb", "Radio", "Standard", "Xtreme", + "Insane", "BrainDead", "BrainDead+", "BrainDead++" + }; + + return profile >= + sizeof (Names) / sizeof (*Names) ? na : Names[profile]; +} + +int +read_file_header_fp(FILE *fp, StreamInfoMpc * Info) +{ + +return 0; +} + +/* + return 0; Info has all info + return 1; File not found + return 2; no Mpc file +*/ +int +info_mpc_read(const char *fn, StreamInfoMpc * Info) +{ + unsigned int HeaderData[16]; + FILE *tmpFile = NULL; + long SkipSizeID3; + + // load file + tmpFile = fopen(fn, "rb"); + + if (tmpFile == NULL) + return 1; // file not found or read-protected + // skip id3v2 + SkipSizeID3=is_id3v2(tmpFile); + fseek(tmpFile,SkipSizeID3 , SEEK_SET); + fread((void *) HeaderData, sizeof (int), 16, tmpFile); + fseek(tmpFile, 0, SEEK_END); + Info->FileSize=ftell(tmpFile); + // stream size + Info->ByteLength = Info->FileSize-is_id3v1(tmpFile)-is_ape(tmpFile)-SkipSizeID3; + + fclose(tmpFile); + + if (0 != memcmp(HeaderData, "MP+", 3)) + return 2; // no musepack file + + Info->StreamVersion = HeaderData[0] >> 24; + if (Info->StreamVersion >= 7) { + const long samplefreqs[4] = { 44100, 48000, 37800, 32000 }; + + // read the file-header (SV7 and above) + Info->Bitrate = 0; + Info->Frames = HeaderData[1]; + Info->SampleFreq = samplefreqs[(HeaderData[2] >> 16) & 0x0003]; + Info->MaxBand = (HeaderData[2] >> 24) & 0x003F; + Info->MS = (HeaderData[2] >> 30) & 0x0001; + Info->Profile = (HeaderData[2] << 8) >> 28; + Info->IS = (HeaderData[2] >> 31) & 0x0001; + Info->BlockSize = 1; + + Info->EncoderVersion = (HeaderData[6] >> 24) & 0x00FF; + Info->Channels = 2; + // gain + Info->EstPeakTitle = HeaderData[2] & 0xFFFF; // read the ReplayGain data + Info->GainTitle = (HeaderData[3] >> 16) & 0xFFFF; + Info->PeakTitle = HeaderData[3] & 0xFFFF; + Info->GainAlbum = (HeaderData[4] >> 16) & 0xFFFF; + Info->PeakAlbum = HeaderData[4] & 0xFFFF; + // gaples + Info->IsTrueGapless = (HeaderData[5] >> 31) & 0x0001; // true gapless: used? + Info->LastFrameSamples = (HeaderData[5] >> 20) & 0x07FF; // true gapless: valid samples for last frame + + if (Info->EncoderVersion == 0) { + sprintf(Info->Encoder, "<= 1.05"); // Buschmann 1.7.x, Klemm <= 1.05 + } else { + switch (Info->EncoderVersion % 10) { + case 0: + sprintf(Info->Encoder, "%u.%u", + Info->EncoderVersion / 100, + Info->EncoderVersion / 10 % 10); + break; + case 2: + case 4: + case 6: + case 8: + sprintf(Info->Encoder, "%u.%02u Beta", + Info->EncoderVersion / 100, + Info->EncoderVersion % 100); + break; + default: + sprintf(Info->Encoder, "%u.%02u Alpha", + Info->EncoderVersion / 100, + Info->EncoderVersion % 100); + break; + } + } + // estimation, exact value needs too much time + Info->Bitrate = (long) (Info->ByteLength) * 8. * Info->SampleFreq / (1152 * Info->Frames - 576); + + } else { + // read the file-header (SV6 and below) + Info->Bitrate = ((HeaderData[0] >> 23) & 0x01FF) * 1000; // read the file-header (SV6 and below) + Info->MS = (HeaderData[0] >> 21) & 0x0001; + Info->IS = (HeaderData[0] >> 22) & 0x0001; + Info->StreamVersion = (HeaderData[0] >> 11) & 0x03FF; + Info->MaxBand = (HeaderData[0] >> 6) & 0x001F; + Info->BlockSize = (HeaderData[0]) & 0x003F; + + Info->Profile = 0; + //gain + Info->GainTitle = 0; // not supported + Info->PeakTitle = 0; + Info->GainAlbum = 0; + Info->PeakAlbum = 0; + //gaples + Info->LastFrameSamples = 0; + Info->IsTrueGapless = 0; + + if (Info->StreamVersion >= 5) + Info->Frames = HeaderData[1]; // 32 bit + else + Info->Frames = (HeaderData[1] >> 16); // 16 bit + + Info->EncoderVersion = 0; + Info->Encoder[0] = '\0'; +#if 0 + if (Info->StreamVersion == 7) + return ERROR_CODE_SV7BETA; // are there any unsupported parameters used? + if (Info->Bitrate != 0) + return ERROR_CODE_CBR; + if (Info->IS != 0) + return ERROR_CODE_IS; + if (Info->BlockSize != 1) + return ERROR_CODE_BLOCKSIZE; +#endif + if (Info->StreamVersion < 6) // Bugfix: last frame was invalid for up to SV5 + Info->Frames -= 1; + + Info->SampleFreq = 44100; // AB: used by all files up to SV7 + Info->Channels = 2; + } + + Info->ProfileName=profile_stringify(Info->Profile); + + Info->Duration = (int) (Info->Frames * 1152 / (Info->SampleFreq/1000.0)); + return 0; +} |