From c31dea6136df692a3b0a3fcf490696b718fe9a05 Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Thu, 1 Nov 2007 18:38:15 +0000 Subject: split adx encoder in its own file Originally committed as revision 10903 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/adx.c | 186 +------------------------------------------------------ 1 file changed, 1 insertion(+), 185 deletions(-) (limited to 'libavcodec/adx.c') diff --git a/libavcodec/adx.c b/libavcodec/adx.c index 6cb0f89396..cc7ca5ffcf 100644 --- a/libavcodec/adx.c +++ b/libavcodec/adx.c @@ -19,6 +19,7 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" +#include "adx.h" /** * @file adx.c @@ -29,69 +30,8 @@ * 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 - /* 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 (maxd) 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; - - AV_WB16(adx, 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 = AV_RB16(in); @@ -138,117 +78,6 @@ static void adx_decode_stereo(short *out,const unsigned char *in,PREV *prev) } } -#ifdef CONFIG_ENCODERS - -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 - AV_WB32(buf+0x00,0x80000000|0x20); - AV_WB32(buf+0x04,0x03120400|avctx->channels); - AV_WB32(buf+0x08,avctx->sample_rate); - AV_WB32(buf+0x0c,0); /* FIXME: set after */ - AV_WB32(buf+0x10,0x01040300); - AV_WB32(buf+0x14,0x00000000); - AV_WB32(buf+0x18,0x00000000); - memcpy(buf+0x1c,"\0\0(c)CRI",8); - return 0x20+4; -} - -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"); - - 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 - /* return data offset or 0 */ static int adx_decode_header(AVCodecContext *avctx,const unsigned char *buf,size_t bufsize) { @@ -327,19 +156,6 @@ static int adx_decode_frame(AVCodecContext *avctx, 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, -- cgit v1.2.3