/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2009 Mohamed Tarek * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include #include #include #include #include "system.h" #include "metadata.h" #include "metadata_common.h" #include "metadata_parsers.h" #include "logf.h" /* Uncomment the following line for debugging */ //#define DEBUG_RM #ifndef DEBUG_RM #undef DEBUGF #define DEBUGF(...) #endif #define ID3V1_OFFSET -128 #define METADATA_FOOTER_OFFSET -140 static inline void print_cook_extradata(RMContext *rmctx) { DEBUGF(" cook_version = 0x%08lx\n", rm_get_uint32be(rmctx->codec_extradata)); DEBUGF(" samples_per_frame_per_channel = %d\n", rm_get_uint16be(&rmctx->codec_extradata[4])); DEBUGF(" number_of_subbands_in_freq_domain = %d\n", rm_get_uint16be(&rmctx->codec_extradata[6])); if(rmctx->extradata_size == 16) { DEBUGF(" joint_stereo_subband_start = %d\n",rm_get_uint16be(&rmctx->codec_extradata[12])); DEBUGF(" joint_stereo_vlc_bits = %d\n", rm_get_uint16be(&rmctx->codec_extradata[14])); } } struct real_object_t { uint32_t fourcc; uint32_t size; uint16_t version; }; static int real_read_object_header(int fd, struct real_object_t* obj) { int n; if ((n = read_uint32be(fd, &obj->fourcc)) <= 0) return n; if ((n = read_uint32be(fd, &obj->size)) <= 0) return n; if ((n = read_uint16be(fd, &obj->version)) <= 0) return n; return 1; } #if (defined(SIMULATOR) && defined(DEBUG_RM)) static char* fourcc2str(uint32_t f) { static char res[5]; res[0] = (f & 0xff000000) >> 24; res[1] = (f & 0xff0000) >> 16; res[2] = (f & 0xff00) >> 8; res[3] = (f & 0xff); res[4] = 0; return res; } #endif static inline int real_read_audio_stream_info(int fd, RMContext *rmctx) { int skipped = 0; uint32_t version; struct real_object_t obj; #ifdef SIMULATOR uint32_t header_size; uint16_t flavor; uint32_t coded_framesize; uint8_t interleaver_id_length; uint8_t fourcc_length; #endif uint32_t interleaver_id; uint32_t fourcc = 0; memset(&obj,0,sizeof(obj)); read_uint32be(fd, &version); skipped += 4; DEBUGF(" version=0x%04lx\n",((version >> 16) & 0xff)); if (((version >> 16) & 0xff) == 3) { /* Very old version */ } else { #ifdef SIMULATOR real_read_object_header(fd, &obj); read_uint32be(fd, &header_size); /* obj.size will be filled with an unknown value, replaced with header_size */ DEBUGF(" Object: %s, size: %ld bytes, version: 0x%04x\n",fourcc2str(obj.fourcc),header_size,obj.version); read_uint16be(fd, &flavor); read_uint32be(fd, &coded_framesize); #else lseek(fd, 20, SEEK_CUR); #endif lseek(fd, 12, SEEK_CUR); /* unknown */ read_uint16be(fd, &rmctx->sub_packet_h); read_uint16be(fd, &rmctx->block_align); read_uint16be(fd, &rmctx->sub_packet_size); lseek(fd, 2, SEEK_CUR); /* unknown */ skipped += 40; if (((version >> 16) & 0xff) == 5) { lseek(fd, 6, SEEK_CUR); /* unknown */ skipped += 6; } read_uint16be(fd, &rmctx->sample_rate); lseek(fd, 4, SEEK_CUR); /* unknown */ read_uint16be(fd, &rmctx->nb_channels); skipped += 8; if (((version >> 16) & 0xff) == 4) { #ifdef SIMULATOR read_uint8(fd, &interleaver_id_length); read_uint32be(fd, &interleaver_id); read_uint8(fd, &fourcc_length); #else lseek(fd, 6, SEEK_CUR); #endif read_uint32be(fd, &fourcc); skipped += 10; } if (((version >> 16) & 0xff) == 5) { read_uint32be(fd, &interleaver_id); read_uint32be(fd, &fourcc); skipped += 8; } lseek(fd, 3, SEEK_CUR); /* unknown */ skipped += 3; if (((version >> 16) & 0xff) == 5) { lseek(fd, 1, SEEK_CUR); /* unknown */ skipped += 1; } switch(fourcc) { case FOURCC('c','o','o','k'): rmctx->codec_type = CODEC_COOK; read_uint32be(fd, &rmctx->extradata_size); skipped += 4; read(fd, rmctx->codec_extradata, rmctx->extradata_size); skipped += rmctx->extradata_size; break; case FOURCC('r','a','a','c'): case FOURCC('r','a','c','p'): rmctx->codec_type = CODEC_AAC; read_uint32be(fd, &rmctx->extradata_size); skipped += 4; read(fd, rmctx->codec_extradata, rmctx->extradata_size); skipped += rmctx->extradata_size; break; case FOURCC('d','n','e','t'): rmctx->codec_type = CODEC_AC3; break; case FOURCC('a','t','r','c'): rmctx->codec_type = CODEC_ATRAC; read_uint32be(fd, &rmctx->extradata_size); skipped += 4; read(fd, rmctx->codec_extradata, rmctx->extradata_size); skipped += rmctx->extradata_size; break; default: /* Not a supported codec */ return -1; } DEBUGF(" flavor = %d\n",flavor); DEBUGF(" coded_frame_size = %ld\n",coded_framesize); DEBUGF(" sub_packet_h = %d\n",rmctx->sub_packet_h); DEBUGF(" frame_size = %d\n",rmctx->block_align); DEBUGF(" sub_packet_size = %d\n",rmctx->sub_packet_size); DEBUGF(" sample_rate= %d\n",rmctx->sample_rate); DEBUGF(" channels= %d\n",rmctx->nb_channels); DEBUGF(" fourcc = %s\n",fourcc2str(fourcc)); DEBUGF(" codec_extra_data_length = %ld\n",rmctx->extradata_size); DEBUGF(" codec_extradata :\n"); if(rmctx->codec_type == CODEC_COOK) { DEBUGF(" cook_extradata :\n"); print_cook_extradata(rmctx); } } return skipped; } static int rm_parse_header(int fd, RMContext *rmctx, struct mp3entry *id3) { struct real_object_t obj; int res; int skipped; off_t curpos; uint8_t len; /* Holds a string_length, which is then passed to read_string() */ #ifdef SIMULATOR uint32_t avg_bitrate = 0; uint32_t max_packet_size; uint32_t avg_packet_size; uint32_t packet_count; uint32_t duration; uint32_t preroll; uint32_t index_offset; uint16_t stream_id; uint32_t start_time; uint32_t codec_data_size; #endif uint32_t v; uint32_t max_bitrate; uint16_t num_streams; uint32_t next_data_off; uint8_t header_end; memset(&obj,0,sizeof(obj)); curpos = lseek(fd, 0, SEEK_SET); res = real_read_object_header(fd, &obj); if (obj.fourcc == FOURCC('.','r','a',0xfd)) { /* Very old .ra format - not yet supported */ return -1; } else if (obj.fourcc != FOURCC('.','R','M','F')) { return -1; } lseek(fd, 8, SEEK_CUR); /* unknown */ DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos); res = real_read_object_header(fd, &obj); header_end = 0; while(res) { DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos); skipped = 10; if(obj.fourcc == FOURCC('I','N','D','X')) break; switch (obj.fourcc) { case FOURCC('P','R','O','P'): /* File properties */ read_uint32be(fd, &max_bitrate); read_uint32be(fd, &rmctx->bit_rate); /*avg bitrate*/ #ifdef SIMULATOR read_uint32be(fd, &max_packet_size); read_uint32be(fd, &avg_packet_size); read_uint32be(fd, &packet_count); #else lseek(fd, 3*sizeof(uint32_t), SEEK_CUR); #endif read_uint32be(fd, &rmctx->duration); #ifdef SIMULATOR read_uint32be(fd, &preroll); read_uint32be(fd, &index_offset); #else lseek(fd, 2*sizeof(uint32_t), SEEK_CUR); #endif read_uint32be(fd, &rmctx->data_offset); read_uint16be(fd, &num_streams); read_uint16be(fd, &rmctx->flags); skipped += 40; DEBUGF(" max_bitrate = %ld\n",max_bitrate); DEBUGF(" avg_bitrate = %ld\n",rmctx->bit_rate); DEBUGF(" max_packet_size = %ld\n",max_packet_size); DEBUGF(" avg_packet_size = %ld\n",avg_packet_size); DEBUGF(" packet_count = %ld\n",packet_count); DEBUGF(" duration = %ld\n",rmctx->duration); DEBUGF(" preroll = %ld\n",preroll); DEBUGF(" index_offset = %ld\n",index_offset); DEBUGF(" data_offset = %ld\n",rmctx->data_offset); DEBUGF(" num_streams = %d\n",num_streams); DEBUGF(" flags=0x%04x\n",rmctx->flags); break; case FOURCC('C','O','N','T'): /* Four strings - Title, Author, Copyright, Comment */ read_uint8(fd,&len); skipped += (int)read_string(fd, id3->id3v1buf[0], sizeof(id3->id3v1buf[0]), '\0', len); read_uint8(fd,&len); skipped += (int)read_string(fd, id3->id3v1buf[1], sizeof(id3->id3v1buf[1]), '\0', len); read_uint8(fd,&len); skipped += (int)read_string(fd, id3->id3v1buf[2], sizeof(id3->id3v1buf[2]), '\0', len); read_uint8(fd,&len); skipped += (int)read_string(fd, id3->id3v1buf[3], sizeof(id3->id3v1buf[3]), '\0', len); skipped += 4; DEBUGF(" title=\"%s\"\n",id3->id3v1buf[0]); DEBUGF(" author=\"%s\"\n",id3->id3v1buf[1]); DEBUGF(" copyright=\"%s\"\n",id3->id3v1buf[2]); DEBUGF(" comment=\"%s\"\n",id3->id3v1buf[3]); break; case FOURCC('M','D','P','R'): /* Media properties */ #ifdef SIMULATOR read_uint16be(fd,&stream_id); read_uint32be(fd,&max_bitrate); read_uint32be(fd,&avg_bitrate); read_uint32be(fd,&max_packet_size); read_uint32be(fd,&avg_packet_size); read_uint32be(fd,&start_time); read_uint32be(fd,&preroll); read_uint32be(fd,&duration); #else lseek(fd, 30, SEEK_CUR); #endif skipped += 30; read_uint8(fd,&len); skipped += 1; lseek(fd, len, SEEK_CUR); /* desc */ skipped += len; read_uint8(fd,&len); skipped += 1; #ifdef SIMULATOR lseek(fd, len, SEEK_CUR); /* mimetype */ read_uint32be(fd,&codec_data_size); #else lseek(fd, len + 4, SEEK_CUR); #endif skipped += len + 4; read_uint32be(fd,&v); skipped += 4; DEBUGF(" stream_id = 0x%04x\n",stream_id); DEBUGF(" max_bitrate = %ld\n",max_bitrate); DEBUGF(" avg_bitrate = %ld\n",avg_bitrate); DEBUGF(" max_packet_size = %ld\n",max_packet_size); DEBUGF(" avg_packet_size = %ld\n",avg_packet_size); DEBUGF(" start_time = %ld\n",start_time); DEBUGF(" preroll = %ld\n",preroll); DEBUGF(" duration = %ld\n",duration); DEBUGF(" codec_data_size = %ld\n",codec_data_size); DEBUGF(" v=\"%s\"\n", fourcc2str(v)); if (v == FOURCC('.','r','a',0xfd)) { int temp; temp= real_read_audio_stream_info(fd, rmctx); if(temp < 0) return -1; else skipped += temp; } break; case FOURCC('D','A','T','A'): read_uint32be(fd,&rmctx->nb_packets); skipped += 4; read_uint32be(fd,&next_data_off); skipped += 4; /*** * nb_packets correction : * in some samples, number of packets may not exactly form * an integer number of scrambling units. This is corrected * by constructing a partially filled unit out of the few * remaining samples at the end of decoding. ***/ if(rmctx->nb_packets % rmctx->sub_packet_h) rmctx->nb_packets += rmctx->sub_packet_h - (rmctx->nb_packets % rmctx->sub_packet_h); DEBUGF(" data_nb_packets = %ld\n",rmctx->nb_packets); DEBUGF(" next DATA offset = %ld\n",next_data_off); header_end = 1; break; } if(header_end) break; curpos = lseek(fd, obj.size - skipped, SEEK_CUR); res = real_read_object_header(fd, &obj); } return 0; } bool get_rm_metadata(int fd, struct mp3entry* id3) { RMContext *rmctx = (RMContext*) (( (intptr_t)id3->id3v2buf + 3 ) &~ 3); memset(rmctx,0,sizeof(RMContext)); if(rm_parse_header(fd, rmctx, id3) < 0) return false; if (!setid3v1title(fd, id3)) { /* file has no id3v1 tags, use the tags from CONT chunk */ id3->title = id3->id3v1buf[0]; id3->artist = id3->id3v1buf[1]; id3->comment= id3->id3v1buf[3]; } switch(rmctx->codec_type) { case CODEC_COOK: /* Already set, do nothing */ break; case CODEC_AAC: id3->codectype = AFMT_RM_AAC; break; case CODEC_AC3: id3->codectype = AFMT_RM_AC3; break; case CODEC_ATRAC: id3->codectype = AFMT_RM_ATRAC3; break; } id3->channels = rmctx->nb_channels; id3->extradata_size = rmctx->extradata_size; id3->bitrate = rmctx->bit_rate / 1000; id3->frequency = rmctx->sample_rate; id3->length = rmctx->duration; id3->filesize = filesize(fd); return true; }