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Diffstat (limited to 'contrib/ffmpeg/libavcodec/adx.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/adx.c | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/contrib/ffmpeg/libavcodec/adx.c b/contrib/ffmpeg/libavcodec/adx.c deleted file mode 100644 index b449c9124..000000000 --- a/contrib/ffmpeg/libavcodec/adx.c +++ /dev/null @@ -1,412 +0,0 @@ -/* - * ADX ADPCM codecs - * Copyright (c) 2001,2003 BERO - * - * This file is part of FFmpeg. - * - * FFmpeg 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. - * - * FFmpeg 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "avcodec.h" - -/** - * @file adx.c - * SEGA CRI adx codecs. - * - * Reference documents: - * http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html - * adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/ - */ - -typedef struct { - int s1,s2; -} PREV; - -typedef struct { - PREV prev[2]; - int header_parsed; - unsigned char dec_temp[18*2]; - unsigned short enc_temp[32*2]; - int in_temp; -} ADXContext; - -//#define BASEVOL 0x11e0 -#define BASEVOL 0x4000 -#define SCALE1 0x7298 -#define SCALE2 0x3350 - -#define CLIP(s) if (s>32767) s=32767; else if (s<-32768) s=-32768 - -/* 18 bytes <-> 32 samples */ - -#ifdef CONFIG_ENCODERS -static void adx_encode(unsigned char *adx,const short *wav,PREV *prev) -{ - int scale; - int i; - int s0,s1,s2,d; - int max=0; - int min=0; - int data[32]; - - s1 = prev->s1; - s2 = prev->s2; - for(i=0;i<32;i++) { - s0 = wav[i]; - d = ((s0<<14) - SCALE1*s1 + SCALE2*s2)/BASEVOL; - data[i]=d; - if (max<d) max=d; - if (min>d) min=d; - s2 = s1; - s1 = s0; - } - prev->s1 = s1; - prev->s2 = s2; - - /* -8..+7 */ - - if (max==0 && min==0) { - memset(adx,0,18); - return; - } - - if (max/7>-min/8) scale = max/7; - else scale = -min/8; - - if (scale==0) scale=1; - - adx[0] = scale>>8; - adx[1] = scale; - - for(i=0;i<16;i++) { - adx[i+2] = ((data[i*2]/scale)<<4) | ((data[i*2+1]/scale)&0xf); - } -} -#endif //CONFIG_ENCODERS - -static void adx_decode(short *out,const unsigned char *in,PREV *prev) -{ - int scale = ((in[0]<<8)|(in[1])); - int i; - int s0,s1,s2,d; - -// printf("%x ",scale); - - in+=2; - s1 = prev->s1; - s2 = prev->s2; - for(i=0;i<16;i++) { - d = in[i]; - // d>>=4; if (d&8) d-=16; - d = ((signed char)d >> 4); - s0 = (BASEVOL*d*scale + SCALE1*s1 - SCALE2*s2)>>14; - CLIP(s0); - *out++=s0; - s2 = s1; - s1 = s0; - - d = in[i]; - //d&=15; if (d&8) d-=16; - d = ((signed char)(d<<4) >> 4); - s0 = (BASEVOL*d*scale + SCALE1*s1 - SCALE2*s2)>>14; - CLIP(s0); - *out++=s0; - s2 = s1; - s1 = s0; - } - prev->s1 = s1; - prev->s2 = s2; - -} - -static void adx_decode_stereo(short *out,const unsigned char *in,PREV *prev) -{ - short tmp[32*2]; - int i; - - adx_decode(tmp ,in ,prev); - adx_decode(tmp+32,in+18,prev+1); - for(i=0;i<32;i++) { - out[i*2] = tmp[i]; - out[i*2+1] = tmp[i+32]; - } -} - -#ifdef CONFIG_ENCODERS - -static void write_long(unsigned char *p,uint32_t v) -{ - p[0] = v>>24; - p[1] = v>>16; - p[2] = v>>8; - p[3] = v; -} - -static int adx_encode_header(AVCodecContext *avctx,unsigned char *buf,size_t bufsize) -{ -#if 0 - struct { - uint32_t offset; /* 0x80000000 + sample start - 4 */ - unsigned char unknown1[3]; /* 03 12 04 */ - unsigned char channel; /* 1 or 2 */ - uint32_t freq; - uint32_t size; - uint32_t unknown2; /* 01 f4 03 00 */ - uint32_t unknown3; /* 00 00 00 00 */ - uint32_t unknown4; /* 00 00 00 00 */ - - /* if loop - unknown3 00 15 00 01 - unknown4 00 00 00 01 - long loop_start_sample; - long loop_start_byte; - long loop_end_sample; - long loop_end_byte; - long - */ - } adxhdr; /* big endian */ - /* offset-6 "(c)CRI" */ -#endif - write_long(buf+0x00,0x80000000|0x20); - write_long(buf+0x04,0x03120400|avctx->channels); - write_long(buf+0x08,avctx->sample_rate); - write_long(buf+0x0c,0); /* FIXME: set after */ - write_long(buf+0x10,0x01040300); - write_long(buf+0x14,0x00000000); - write_long(buf+0x18,0x00000000); - memcpy(buf+0x1c,"\0\0(c)CRI",8); - return 0x20+4; -} - -static int adx_decode_init(AVCodecContext *avctx); -static int adx_encode_init(AVCodecContext *avctx) -{ - if (avctx->channels > 2) - return -1; /* only stereo or mono =) */ - avctx->frame_size = 32; - - avctx->coded_frame= avcodec_alloc_frame(); - avctx->coded_frame->key_frame= 1; - -// avctx->bit_rate = avctx->sample_rate*avctx->channels*18*8/32; - - av_log(avctx, AV_LOG_DEBUG, "adx encode init\n"); - adx_decode_init(avctx); - - return 0; -} - -static int adx_encode_close(AVCodecContext *avctx) -{ - av_freep(&avctx->coded_frame); - - return 0; -} - -static int adx_encode_frame(AVCodecContext *avctx, - uint8_t *frame, int buf_size, void *data) -{ - ADXContext *c = avctx->priv_data; - const short *samples = data; - unsigned char *dst = frame; - int rest = avctx->frame_size; - -/* - input data size = - ffmpeg.c: do_audio_out() - frame_bytes = enc->frame_size * 2 * enc->channels; -*/ - -// printf("sz=%d ",buf_size); fflush(stdout); - if (!c->header_parsed) { - int hdrsize = adx_encode_header(avctx,dst,buf_size); - dst+=hdrsize; - c->header_parsed = 1; - } - - if (avctx->channels==1) { - while(rest>=32) { - adx_encode(dst,samples,c->prev); - dst+=18; - samples+=32; - rest-=32; - } - } else { - while(rest>=32*2) { - short tmpbuf[32*2]; - int i; - - for(i=0;i<32;i++) { - tmpbuf[i] = samples[i*2]; - tmpbuf[i+32] = samples[i*2+1]; - } - - adx_encode(dst,tmpbuf,c->prev); - adx_encode(dst+18,tmpbuf+32,c->prev+1); - dst+=18*2; - samples+=32*2; - rest-=32*2; - } - } - return dst-frame; -} - -#endif //CONFIG_ENCODERS - -static uint32_t read_long(const unsigned char *p) -{ - return (p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3]; -} - -static int is_adx(const unsigned char *buf,size_t bufsize) -{ - int offset; - - if (buf[0]!=0x80) return 0; - offset = (read_long(buf)^0x80000000)+4; - if (bufsize<offset || memcmp(buf+offset-6,"(c)CRI",6)) return 0; - return offset; -} - -/* return data offset or 6 */ -static int adx_decode_header(AVCodecContext *avctx,const unsigned char *buf,size_t bufsize) -{ - int offset; - int channels,freq,size; - - offset = is_adx(buf,bufsize); - if (offset==0) return 0; - - channels = buf[7]; - freq = read_long(buf+8); - size = read_long(buf+12); - -// printf("freq=%d ch=%d\n",freq,channels); - - avctx->sample_rate = freq; - avctx->channels = channels; - avctx->bit_rate = freq*channels*18*8/32; -// avctx->frame_size = 18*channels; - - return offset; -} - -static int adx_decode_init(AVCodecContext * avctx) -{ - ADXContext *c = avctx->priv_data; - -// printf("adx_decode_init\n"); fflush(stdout); - c->prev[0].s1 = 0; - c->prev[0].s2 = 0; - c->prev[1].s1 = 0; - c->prev[1].s2 = 0; - c->header_parsed = 0; - c->in_temp = 0; - return 0; -} - -#if 0 -static void dump(unsigned char *buf,size_t len) -{ - int i; - for(i=0;i<len;i++) { - if ((i&15)==0) av_log(NULL, AV_LOG_DEBUG, "%04x ",i); - av_log(NULL, AV_LOG_DEBUG, "%02x ",buf[i]); - if ((i&15)==15) av_log(NULL, AV_LOG_DEBUG, "\n"); - } - av_log(NULL, AV_LOG_ERROR, "\n"); -} -#endif - -static int adx_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf0, int buf_size) -{ - ADXContext *c = avctx->priv_data; - short *samples = data; - const uint8_t *buf = buf0; - int rest = buf_size; - - if (!c->header_parsed) { - int hdrsize = adx_decode_header(avctx,buf,rest); - if (hdrsize==0) return -1; - c->header_parsed = 1; - buf += hdrsize; - rest -= hdrsize; - } - - if (c->in_temp) { - int copysize = 18*avctx->channels - c->in_temp; - memcpy(c->dec_temp+c->in_temp,buf,copysize); - rest -= copysize; - buf += copysize; - if (avctx->channels==1) { - adx_decode(samples,c->dec_temp,c->prev); - samples += 32; - } else { - adx_decode_stereo(samples,c->dec_temp,c->prev); - samples += 32*2; - } - } - // - if (avctx->channels==1) { - while(rest>=18) { - adx_decode(samples,buf,c->prev); - rest-=18; - buf+=18; - samples+=32; - } - } else { - while(rest>=18*2) { - adx_decode_stereo(samples,buf,c->prev); - rest-=18*2; - buf+=18*2; - samples+=32*2; - } - } - // - c->in_temp = rest; - if (rest) { - memcpy(c->dec_temp,buf,rest); - buf+=rest; - } - *data_size = (uint8_t*)samples - (uint8_t*)data; -// printf("%d:%d ",buf-buf0,*data_size); fflush(stdout); - return buf-buf0; -} - -#ifdef CONFIG_ENCODERS -AVCodec adpcm_adx_encoder = { - "adpcm_adx", - CODEC_TYPE_AUDIO, - CODEC_ID_ADPCM_ADX, - sizeof(ADXContext), - adx_encode_init, - adx_encode_frame, - adx_encode_close, - NULL, -}; -#endif //CONFIG_ENCODERS - -AVCodec adpcm_adx_decoder = { - "adpcm_adx", - CODEC_TYPE_AUDIO, - CODEC_ID_ADPCM_ADX, - sizeof(ADXContext), - adx_decode_init, - NULL, - NULL, - adx_decode_frame, -}; 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