diff options
Diffstat (limited to 'plugins/demac/libdemac/parser.c')
| -rw-r--r-- | plugins/demac/libdemac/parser.c | 402 |
1 files changed, 0 insertions, 402 deletions
diff --git a/plugins/demac/libdemac/parser.c b/plugins/demac/libdemac/parser.c deleted file mode 100644 index 948640d7..00000000 --- a/plugins/demac/libdemac/parser.c +++ /dev/null @@ -1,402 +0,0 @@ -/* - -libdemac - A Monkey's Audio decoder - -$Id: parser.c 13601 2007-06-09 00:58:15Z dave $ - -Copyright (C) Dave Chapman 2007 - -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; either version 2 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 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., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA - -*/ - -#include <inttypes.h> -#include <string.h> -#ifndef ROCKBOX -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#endif - -#include "parser.h" - -#ifdef APE_MAX -#undef APE_MAX -#endif -#define APE_MAX(a,b) ((a)>(b)?(a):(b)) - - -static inline int16_t get_int16(unsigned char* buf) -{ - return(buf[0] | (buf[1] << 8)); -} - -static inline uint16_t get_uint16(unsigned char* buf) -{ - return(buf[0] | (buf[1] << 8)); -} - -static inline uint32_t get_uint32(unsigned char* buf) -{ - return(buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24)); -} - - -int ape_parseheaderbuf(unsigned char* buf, struct ape_ctx_t* ape_ctx) -{ - unsigned char* header; - - memset(ape_ctx,0,sizeof(struct ape_ctx_t)); - /* TODO: Skip any leading junk such as id3v2 tags */ - ape_ctx->junklength = 0; - - memcpy(ape_ctx->magic, buf, 4); - if (memcmp(ape_ctx->magic,"MAC ",4)!=0) - { - return -1; - } - - ape_ctx->fileversion = get_int16(buf + 4); - - if (ape_ctx->fileversion >= 3980) - { - ape_ctx->padding1 = get_int16(buf + 6); - ape_ctx->descriptorlength = get_uint32(buf + 8); - ape_ctx->headerlength = get_uint32(buf + 12); - ape_ctx->seektablelength = get_uint32(buf + 16); - ape_ctx->wavheaderlength = get_uint32(buf + 20); - ape_ctx->audiodatalength = get_uint32(buf + 24); - ape_ctx->audiodatalength_high = get_uint32(buf + 28); - ape_ctx->wavtaillength = get_uint32(buf + 32); - memcpy(ape_ctx->md5, buf + 36, 16); - - header = buf + ape_ctx->descriptorlength; - - /* Read header data */ - ape_ctx->compressiontype = get_uint16(header + 0); - ape_ctx->formatflags = get_uint16(header + 2); - ape_ctx->blocksperframe = get_uint32(header + 4); - ape_ctx->finalframeblocks = get_uint32(header + 8); - ape_ctx->totalframes = get_uint32(header + 12); - ape_ctx->bps = get_uint16(header + 16); - ape_ctx->channels = get_uint16(header + 18); - ape_ctx->samplerate = get_uint32(header + 20); - - ape_ctx->seektablefilepos = ape_ctx->junklength + - ape_ctx->descriptorlength + - ape_ctx->headerlength; - - ape_ctx->firstframe = ape_ctx->junklength + ape_ctx->descriptorlength + - ape_ctx->headerlength + ape_ctx->seektablelength + - ape_ctx->wavheaderlength; - } else { - ape_ctx->headerlength = 32; - ape_ctx->compressiontype = get_uint16(buf + 6); - ape_ctx->formatflags = get_uint16(buf + 8); - ape_ctx->channels = get_uint16(buf + 10); - ape_ctx->samplerate = get_uint32(buf + 12); - ape_ctx->wavheaderlength = get_uint32(buf + 16); - ape_ctx->totalframes = get_uint32(buf + 24); - ape_ctx->finalframeblocks = get_uint32(buf + 28); - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) - { - ape_ctx->headerlength += 4; - } - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) - { - ape_ctx->seektablelength = get_uint32(buf + ape_ctx->headerlength); - ape_ctx->seektablelength *= sizeof(int32_t); - ape_ctx->headerlength += 4; - } else { - ape_ctx->seektablelength = ape_ctx->totalframes * sizeof(int32_t); - } - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_8_BIT) - ape_ctx->bps = 8; - else if (ape_ctx->formatflags & MAC_FORMAT_FLAG_24_BIT) - ape_ctx->bps = 24; - else - ape_ctx->bps = 16; - - if (ape_ctx->fileversion >= 3950) - ape_ctx->blocksperframe = 73728 * 4; - else if ((ape_ctx->fileversion >= 3900) || (ape_ctx->fileversion >= 3800 && ape_ctx->compressiontype >= 4000)) - ape_ctx->blocksperframe = 73728; - else - ape_ctx->blocksperframe = 9216; - - ape_ctx->seektablefilepos = ape_ctx->junklength + ape_ctx->headerlength + - ape_ctx->wavheaderlength; - - ape_ctx->firstframe = ape_ctx->junklength + ape_ctx->headerlength + - ape_ctx->wavheaderlength + ape_ctx->seektablelength; - } - - ape_ctx->totalsamples = ape_ctx->finalframeblocks; - if (ape_ctx->totalframes > 1) - ape_ctx->totalsamples += ape_ctx->blocksperframe * (ape_ctx->totalframes-1); - - ape_ctx->numseekpoints = APE_MAX(ape_ctx->maxseekpoints, - ape_ctx->seektablelength / sizeof(int32_t)); - - return 0; -} - - -#ifndef ROCKBOX -/* Helper functions */ - -static int read_uint16(int fd, uint16_t* x) -{ - unsigned char tmp[2]; - int n; - - n = read(fd,tmp,2); - - if (n != 2) - return -1; - - *x = tmp[0] | (tmp[1] << 8); - - return 0; -} - -static int read_int16(int fd, int16_t* x) -{ - return read_uint16(fd, (uint16_t*)x); -} - -static int read_uint32(int fd, uint32_t* x) -{ - unsigned char tmp[4]; - int n; - - n = read(fd,tmp,4); - - if (n != 4) - return -1; - - *x = tmp[0] | (tmp[1] << 8) | (tmp[2] << 16) | (tmp[3] << 24); - - return 0; -} - -int ape_parseheader(int fd, struct ape_ctx_t* ape_ctx) -{ - int i,n; - - /* TODO: Skip any leading junk such as id3v2 tags */ - ape_ctx->junklength = 0; - - lseek(fd,ape_ctx->junklength,SEEK_SET); - - n = read(fd,&ape_ctx->magic,4); - if (n != 4) return -1; - - if (memcmp(ape_ctx->magic,"MAC ",4)!=0) - { - return -1; - } - - if (read_int16(fd,&ape_ctx->fileversion) < 0) - return -1; - - if (ape_ctx->fileversion >= 3980) - { - if (read_int16(fd,&ape_ctx->padding1) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->descriptorlength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->headerlength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->seektablelength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->wavheaderlength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->audiodatalength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->audiodatalength_high) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->wavtaillength) < 0) - return -1; - if (read(fd,&ape_ctx->md5,16) != 16) - return -1; - - /* Skip any unknown bytes at the end of the descriptor. This is for future - compatibility */ - if (ape_ctx->descriptorlength > 52) - lseek(fd,ape_ctx->descriptorlength - 52, SEEK_CUR); - - /* Read header data */ - if (read_uint16(fd,&ape_ctx->compressiontype) < 0) - return -1; - if (read_uint16(fd,&ape_ctx->formatflags) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->blocksperframe) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->finalframeblocks) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->totalframes) < 0) - return -1; - if (read_uint16(fd,&ape_ctx->bps) < 0) - return -1; - if (read_uint16(fd,&ape_ctx->channels) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->samplerate) < 0) - return -1; - } else { - ape_ctx->descriptorlength = 0; - ape_ctx->headerlength = 32; - - if (read_uint16(fd,&ape_ctx->compressiontype) < 0) - return -1; - if (read_uint16(fd,&ape_ctx->formatflags) < 0) - return -1; - if (read_uint16(fd,&ape_ctx->channels) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->samplerate) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->wavheaderlength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->wavtaillength) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->totalframes) < 0) - return -1; - if (read_uint32(fd,&ape_ctx->finalframeblocks) < 0) - return -1; - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) - { - lseek(fd, 4, SEEK_CUR); /* Skip the peak level */ - ape_ctx->headerlength += 4; - } - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) - { - if (read_uint32(fd,&ape_ctx->seektablelength) < 0) - return -1; - ape_ctx->headerlength += 4; - ape_ctx->seektablelength *= sizeof(int32_t); - } else { - ape_ctx->seektablelength = ape_ctx->totalframes * sizeof(int32_t); - } - - if (ape_ctx->formatflags & MAC_FORMAT_FLAG_8_BIT) - ape_ctx->bps = 8; - else if (ape_ctx->formatflags & MAC_FORMAT_FLAG_24_BIT) - ape_ctx->bps = 24; - else - ape_ctx->bps = 16; - - if (ape_ctx->fileversion >= 3950) - ape_ctx->blocksperframe = 73728 * 4; - else if ((ape_ctx->fileversion >= 3900) || (ape_ctx->fileversion >= 3800 && ape_ctx->compressiontype >= 4000)) - ape_ctx->blocksperframe = 73728; - else - ape_ctx->blocksperframe = 9216; - - /* Skip any stored wav header */ - if (!(ape_ctx->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER)) - { - lseek(fd, ape_ctx->wavheaderlength, SEEK_CUR); - } - } - - ape_ctx->totalsamples = ape_ctx->finalframeblocks; - if (ape_ctx->totalframes > 1) - ape_ctx->totalsamples += ape_ctx->blocksperframe * (ape_ctx->totalframes-1); - - if (ape_ctx->seektablelength > 0) - { - ape_ctx->seektable = malloc(ape_ctx->seektablelength); - if (ape_ctx->seektable == NULL) - return -1; - for (i=0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) - { - if (read_uint32(fd,&ape_ctx->seektable[i]) < 0) - { - free(ape_ctx->seektable); - return -1; - } - } - } - - ape_ctx->firstframe = ape_ctx->junklength + ape_ctx->descriptorlength + - ape_ctx->headerlength + ape_ctx->seektablelength + - ape_ctx->wavheaderlength; - - return 0; -} - -void ape_dumpinfo(struct ape_ctx_t* ape_ctx) -{ - int i; - - printf("Descriptor Block:\n\n"); - printf("magic = \"%c%c%c%c\"\n", - ape_ctx->magic[0],ape_ctx->magic[1], - ape_ctx->magic[2],ape_ctx->magic[3]); - printf("fileversion = %d\n",ape_ctx->fileversion); - printf("descriptorlength = %d\n",ape_ctx->descriptorlength); - printf("headerlength = %d\n",ape_ctx->headerlength); - printf("seektablelength = %d\n",ape_ctx->seektablelength); - printf("wavheaderlength = %d\n",ape_ctx->wavheaderlength); - printf("audiodatalength = %d\n",ape_ctx->audiodatalength); - printf("audiodatalength_high = %d\n",ape_ctx->audiodatalength_high); - printf("wavtaillength = %d\n",ape_ctx->wavtaillength); - printf("md5 = "); - for (i = 0; i < 16; i++) - printf("%02x",ape_ctx->md5[i]); - printf("\n"); - - printf("\nHeader Block:\n\n"); - - printf("compressiontype = %d\n",ape_ctx->compressiontype); - printf("formatflags = %d\n",ape_ctx->formatflags); - printf("blocksperframe = %d\n",ape_ctx->blocksperframe); - printf("finalframeblocks = %d\n",ape_ctx->finalframeblocks); - printf("totalframes = %d\n",ape_ctx->totalframes); - printf("bps = %d\n",ape_ctx->bps); - printf("channels = %d\n",ape_ctx->channels); - printf("samplerate = %d\n",ape_ctx->samplerate); - - printf("\nSeektable\n\n"); - if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) - { - printf("No seektable\n"); - } - else - { - for ( i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t) ; i++) - { - if (i < ape_ctx->totalframes-1) { - printf("%8d %d (%d bytes)\n",i,ape_ctx->seektable[i],ape_ctx->seektable[i+1]-ape_ctx->seektable[i]); - } else { - printf("%8d %d\n",i,ape_ctx->seektable[i]); - } - } - } - printf("\nCalculated information:\n\n"); - printf("junklength = %d\n",ape_ctx->junklength); - printf("firstframe = %d\n",ape_ctx->firstframe); - printf("totalsamples = %d\n",ape_ctx->totalsamples); -} - -#endif /* !ROCKBOX */ |