From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/demac/libdemac/parser.c | 402 +++++++++++++++++++++++++++++ 1 file changed, 402 insertions(+) create mode 100644 lib/rbcodec/codecs/demac/libdemac/parser.c (limited to 'lib/rbcodec/codecs/demac/libdemac/parser.c') diff --git a/lib/rbcodec/codecs/demac/libdemac/parser.c b/lib/rbcodec/codecs/demac/libdemac/parser.c new file mode 100644 index 0000000000..2af4a292b8 --- /dev/null +++ b/lib/rbcodec/codecs/demac/libdemac/parser.c @@ -0,0 +1,402 @@ +/* + +libdemac - A Monkey's Audio decoder + +$Id$ + +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 +#include +#ifndef ROCKBOX +#include +#include +#include "inttypes.h" +#include +#include +#include +#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 */ -- cgit v1.2.3