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Diffstat (limited to 'apps/codecs/libffmpegFLAC/main.c')
-rw-r--r-- | apps/codecs/libffmpegFLAC/main.c | 322 |
1 files changed, 0 insertions, 322 deletions
diff --git a/apps/codecs/libffmpegFLAC/main.c b/apps/codecs/libffmpegFLAC/main.c deleted file mode 100644 index e6d4b2f4fd..0000000000 --- a/apps/codecs/libffmpegFLAC/main.c +++ /dev/null @@ -1,322 +0,0 @@ -/*************************************************************************** - * __________ __ ___. - * Open \______ \ ____ ____ | | _\_ |__ _______ ___ - * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / - * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < - * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ - * \/ \/ \/ \/ \/ - * $Id$ - * - * Copyright (C) 2005 Dave Chapman - * - * 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. - * - ****************************************************************************/ - -/* A test program for the Rockbox version of the ffmpeg FLAC decoder. - - Compile using Makefile.test - run it as "./test file.flac" to decode the - FLAC file to the file "test.wav" in the current directory - - This test program should support 16-bit and 24-bit mono and stereo files. - - The resulting "test.wav" should have the same md5sum as a WAV file created - by the official FLAC decoder (it produces the same 44-byte canonical WAV - header. -*/ - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <inttypes.h> -#include <stdbool.h> -#include <fcntl.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/stat.h> - -#include "decoder.h" - -static unsigned char wav_header[44]={ - 'R','I','F','F',// 0 - ChunkID - 0,0,0,0, // 4 - ChunkSize (filesize-8) - 'W','A','V','E',// 8 - Format - 'f','m','t',' ',// 12 - SubChunkID - 16,0,0,0, // 16 - SubChunk1ID // 16 for PCM - 1,0, // 20 - AudioFormat (1=Uncompressed) - 2,0, // 22 - NumChannels - 0,0,0,0, // 24 - SampleRate in Hz - 0,0,0,0, // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8) - 4,0, // 32 - BlockAlign (== NumChannels * BitsPerSample/8) - 16,0, // 34 - BitsPerSample - 'd','a','t','a',// 36 - Subchunk2ID - 0,0,0,0 // 40 - Subchunk2Size -}; - -int open_wav(char* filename) { - int fd; - - fd=open(filename,O_CREAT|O_WRONLY|O_TRUNC, S_IRUSR|S_IWUSR); - if (fd >= 0) { - if (write(fd,wav_header,sizeof(wav_header)) < sizeof(wav_header)) { - fprintf(stderr,"[ERR} Failed to write wav header\n"); - exit(1); - } - } - return(fd); -} - -void close_wav(int fd, FLACContext* fc) { - int x; - int filesize; - int bytespersample; - - bytespersample=fc->bps/8; - - filesize=fc->totalsamples*bytespersample*fc->channels+44; - - // ChunkSize - x=filesize-8; - wav_header[4]=(x&0xff); - wav_header[5]=(x&0xff00)>>8; - wav_header[6]=(x&0xff0000)>>16; - wav_header[7]=(x&0xff000000)>>24; - - // Number of channels - wav_header[22]=fc->channels; - - // Samplerate - wav_header[24]=fc->samplerate&0xff; - wav_header[25]=(fc->samplerate&0xff00)>>8; - wav_header[26]=(fc->samplerate&0xff0000)>>16; - wav_header[27]=(fc->samplerate&0xff000000)>>24; - - // ByteRate - x=fc->samplerate*(fc->bps/8)*fc->channels; - wav_header[28]=(x&0xff); - wav_header[29]=(x&0xff00)>>8; - wav_header[30]=(x&0xff0000)>>16; - wav_header[31]=(x&0xff000000)>>24; - - // BlockAlign - wav_header[32]=(fc->bps/8)*fc->channels; - - // Bits per sample - wav_header[34]=fc->bps; - - // Subchunk2Size - x=filesize-44; - wav_header[40]=(x&0xff); - wav_header[41]=(x&0xff00)>>8; - wav_header[42]=(x&0xff0000)>>16; - wav_header[43]=(x&0xff000000)>>24; - - lseek(fd,0,SEEK_SET); - if (write(fd,wav_header,sizeof(wav_header)) < sizeof(wav_header)) { - fprintf(stderr,"[ERR} Failed to write wav header\n"); - exit(1); - } - close(fd); -} - -static void dump_headers(FLACContext *s) -{ - fprintf(stderr," Blocksize: %d .. %d\n", s->min_blocksize, - s->max_blocksize); - fprintf(stderr," Framesize: %d .. %d\n", s->min_framesize, - s->max_framesize); - fprintf(stderr," Samplerate: %d\n", s->samplerate); - fprintf(stderr," Channels: %d\n", s->channels); - fprintf(stderr," Bits per sample: %d\n", s->bps); - fprintf(stderr," Metadata length: %d\n", s->metadatalength); - fprintf(stderr," Total Samples: %lu\n",s->totalsamples); - fprintf(stderr," Duration: %d ms\n",s->length); - fprintf(stderr," Bitrate: %d kbps\n",s->bitrate); -} - -static bool flac_init(int fd, FLACContext* fc) -{ - unsigned char buf[255]; - struct stat statbuf; - bool found_streaminfo=false; - int endofmetadata=0; - int blocklength; - uint32_t* p; - uint32_t seekpoint_lo,seekpoint_hi; - uint32_t offset_lo,offset_hi; - int n; - - if (lseek(fd, 0, SEEK_SET) < 0) - { - return false; - } - - if (read(fd, buf, 4) < 4) - { - return false; - } - - if (memcmp(buf,"fLaC",4) != 0) - { - return false; - } - fc->metadatalength = 4; - - while (!endofmetadata) { - if (read(fd, buf, 4) < 4) - { - return false; - } - - endofmetadata=(buf[0]&0x80); - blocklength = (buf[1] << 16) | (buf[2] << 8) | buf[3]; - fc->metadatalength+=blocklength+4; - - if ((buf[0] & 0x7f) == 0) /* 0 is the STREAMINFO block */ - { - /* FIXME: Don't trust the value of blocklength */ - if (read(fd, buf, blocklength) < 0) - { - return false; - } - - fstat(fd,&statbuf); - fc->filesize = statbuf.st_size; - fc->min_blocksize = (buf[0] << 8) | buf[1]; - fc->max_blocksize = (buf[2] << 8) | buf[3]; - fc->min_framesize = (buf[4] << 16) | (buf[5] << 8) | buf[6]; - fc->max_framesize = (buf[7] << 16) | (buf[8] << 8) | buf[9]; - fc->samplerate = (buf[10] << 12) | (buf[11] << 4) - | ((buf[12] & 0xf0) >> 4); - fc->channels = ((buf[12]&0x0e)>>1) + 1; - fc->bps = (((buf[12]&0x01) << 4) | ((buf[13]&0xf0)>>4) ) + 1; - - /* totalsamples is a 36-bit field, but we assume <= 32 bits are - used */ - fc->totalsamples = (buf[14] << 24) | (buf[15] << 16) - | (buf[16] << 8) | buf[17]; - - /* Calculate track length (in ms) and estimate the bitrate - (in kbit/s) */ - fc->length = (fc->totalsamples / fc->samplerate) * 1000; - - found_streaminfo=true; - } else if ((buf[0] & 0x7f) == 3) { /* 3 is the SEEKTABLE block */ - fprintf(stderr,"Seektable length = %d bytes\n",blocklength); - while (blocklength >= 18) { - n=read(fd,buf,18); - if (n < 18) return false; - blocklength-=n; - - p=(uint32_t*)buf; - seekpoint_hi=betoh32(*(p++)); - seekpoint_lo=betoh32(*(p++)); - offset_hi=betoh32(*(p++)); - offset_lo=betoh32(*(p++)); - - if ((seekpoint_hi != 0xffffffff) && (seekpoint_lo != 0xffffffff)) { - fprintf(stderr,"Seekpoint: %u, Offset=%u\n",seekpoint_lo,offset_lo); - } - } - lseek(fd, blocklength, SEEK_CUR); - } else { - /* Skip to next metadata block */ - if (lseek(fd, blocklength, SEEK_CUR) < 0) - { - return false; - } - } - } - - if (found_streaminfo) { - fc->bitrate = ((fc->filesize-fc->metadatalength) * 8) / fc->length; - return true; - } else { - return false; - } -} - -/* Dummy function needed to pass to flac_decode_frame() */ -void yield() { -} - -int main(int argc, char* argv[]) { - FLACContext fc; - int fd,fdout; - int n; - int i; - int bytesleft; - int consumed; - unsigned char buf[MAX_FRAMESIZE]; /* The input buffer */ - /* The output buffers containing the decoded samples (channels 0 and 1) */ - int32_t decoded0[MAX_BLOCKSIZE]; - int32_t decoded1[MAX_BLOCKSIZE]; - - /* For testing */ - int8_t wavbuf[MAX_CHANNELS*MAX_BLOCKSIZE*3]; - int8_t* p; - int scale; - - fd=open(argv[1],O_RDONLY); - - if (fd < 0) { - fprintf(stderr,"Can not parse %s\n",argv[1]); - return(1); - } - - /* Read the metadata and position the file pointer at the start of the - first audio frame */ - flac_init(fd,&fc); - - dump_headers(&fc); - - fdout=open_wav("test.wav"); - bytesleft=read(fd,buf,sizeof(buf)); - while (bytesleft) { - if(flac_decode_frame(&fc,decoded0,decoded1,buf,bytesleft,yield) < 0) { - fprintf(stderr,"DECODE ERROR, ABORTING\n"); - break; - } - consumed=fc.gb.index/8; - - scale=FLAC_OUTPUT_DEPTH-fc.bps; - p=wavbuf; - for (i=0;i<fc.blocksize;i++) { - /* Left sample */ - decoded0[i]=decoded0[i]>>scale; - *(p++)=decoded0[i]&0xff; - *(p++)=(decoded0[i]&0xff00)>>8; - if (fc.bps==24) *(p++)=(decoded0[i]&0xff0000)>>16; - - if (fc.channels==2) { - /* Right sample */ - decoded1[i]=decoded1[i]>>scale; - *(p++)=decoded1[i]&0xff; - *(p++)=(decoded1[i]&0xff00)>>8; - if (fc.bps==24) *(p++)=(decoded1[i]&0xff0000)>>16; - } - } - n = fc.blocksize*fc.channels*(fc.bps/8); - if (write(fdout,wavbuf,n) < n) { - fprintf(stderr,"[ERR] Write failed\n"); - exit(1); - } - - memmove(buf,&buf[consumed],bytesleft-consumed); - bytesleft-=consumed; - - n=read(fd,&buf[bytesleft],sizeof(buf)-bytesleft); - if (n > 0) { - bytesleft+=n; - } - } - close_wav(fdout,&fc); - close(fd); - return(0); -} |