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author | Michael Niedermayer <michaelni@gmx.at> | 2003-06-01 00:56:05 +0000 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2003-06-01 00:56:05 +0000 |
commit | 8809cfee0a6faa61055dfb2229879a822267a22b (patch) | |
tree | ba89020a444917b4feb358fe2f114c328e3f8f7a | |
parent | 642d7e842e7280e0fc5cde1fb2677172bc5f10d6 (diff) | |
download | ffmpeg-streaming-8809cfee0a6faa61055dfb2229879a822267a22b.zip ffmpeg-streaming-8809cfee0a6faa61055dfb2229879a822267a22b.tar.gz |
4xm codec
Originally committed as revision 1923 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r-- | libavcodec/4xm.c | 745 | ||||
-rw-r--r-- | libavcodec/Makefile | 2 | ||||
-rw-r--r-- | libavcodec/allcodecs.c | 1 | ||||
-rw-r--r-- | libavcodec/avcodec.h | 1 |
4 files changed, 748 insertions, 1 deletions
diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c new file mode 100644 index 0000000..7dac0d3 --- /dev/null +++ b/libavcodec/4xm.c @@ -0,0 +1,745 @@ +/* + * 4XM codec + * Copyright (c) 2003 Michael Niedermayer + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file 4xm.c + * 4XM codec. + */ + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" + +//#undef NDEBUG +//#include <assert.h> + +#define BLOCK_TYPE_VLC_BITS 5 +#define ACDC_VLC_BITS 9 + +#define CFRAME_BUFFER_COUNT 100 + +static const uint8_t block_type_tab[4][8][2]={ + { //{8,4,2}x{8,4,2} + { 0,1}, { 2,2}, { 6,3}, {14,4}, {30,5}, {31,5}, { 0,0} + },{ //{8,4}x1 + { 0,1}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}, { 0,0} + },{ //1x{8,4} + { 0,1}, { 2,2}, { 0,0}, { 6,3}, {14,4}, {15,4}, { 0,0} + },{ //1x2, 2x1 + { 0,1}, { 0,0}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4} + } +}; + +static const uint8_t size2index[4][4]={ + {-1, 3, 1, 1}, + { 3, 0, 0, 0}, + { 2, 0, 0, 0}, + { 2, 0, 0, 0}, +}; + +static const int8_t mv[256][2]={ +{ 0, 0},{ 0, -1},{ -1, 0},{ 1, 0},{ 0, 1},{ -1, -1},{ 1, -1},{ -1, 1}, +{ 1, 1},{ 0, -2},{ -2, 0},{ 2, 0},{ 0, 2},{ -1, -2},{ 1, -2},{ -2, -1}, +{ 2, -1},{ -2, 1},{ 2, 1},{ -1, 2},{ 1, 2},{ -2, -2},{ 2, -2},{ -2, 2}, +{ 2, 2},{ 0, -3},{ -3, 0},{ 3, 0},{ 0, 3},{ -1, -3},{ 1, -3},{ -3, -1}, +{ 3, -1},{ -3, 1},{ 3, 1},{ -1, 3},{ 1, 3},{ -2, -3},{ 2, -3},{ -3, -2}, +{ 3, -2},{ -3, 2},{ 3, 2},{ -2, 3},{ 2, 3},{ 0, -4},{ -4, 0},{ 4, 0}, +{ 0, 4},{ -1, -4},{ 1, -4},{ -4, -1},{ 4, -1},{ 4, 1},{ -1, 4},{ 1, 4}, +{ -3, -3},{ -3, 3},{ 3, 3},{ -2, -4},{ -4, -2},{ 4, -2},{ -4, 2},{ -2, 4}, +{ 2, 4},{ -3, -4},{ 3, -4},{ 4, -3},{ -5, 0},{ -4, 3},{ -3, 4},{ 3, 4}, +{ -1, -5},{ -5, -1},{ -5, 1},{ -1, 5},{ -2, -5},{ 2, -5},{ 5, -2},{ 5, 2}, +{ -4, -4},{ -4, 4},{ -3, -5},{ -5, -3},{ -5, 3},{ 3, 5},{ -6, 0},{ 0, 6}, +{ -6, -1},{ -6, 1},{ 1, 6},{ 2, -6},{ -6, 2},{ 2, 6},{ -5, -4},{ 5, 4}, +{ 4, 5},{ -6, -3},{ 6, 3},{ -7, 0},{ -1, -7},{ 5, -5},{ -7, 1},{ -1, 7}, +{ 4, -6},{ 6, 4},{ -2, -7},{ -7, 2},{ -3, -7},{ 7, -3},{ 3, 7},{ 6, -5}, +{ 0, -8},{ -1, -8},{ -7, -4},{ -8, 1},{ 4, 7},{ 2, -8},{ -2, 8},{ 6, 6}, +{ -8, 3},{ 5, -7},{ -5, 7},{ 8, -4},{ 0, -9},{ -9, -1},{ 1, 9},{ 7, -6}, +{ -7, 6},{ -5, -8},{ -5, 8},{ -9, 3},{ 9, -4},{ 7, -7},{ 8, -6},{ 6, 8}, +{ 10, 1},{-10, 2},{ 9, -5},{ 10, -3},{ -8, -7},{-10, -4},{ 6, -9},{-11, 0}, +{ 11, 1},{-11, -2},{ -2, 11},{ 7, -9},{ -7, 9},{ 10, 6},{ -4, 11},{ 8, -9}, +{ 8, 9},{ 5, 11},{ 7,-10},{ 12, -3},{ 11, 6},{ -9, -9},{ 8, 10},{ 5, 12}, +{-11, 7},{ 13, 2},{ 6,-12},{ 10, 9},{-11, 8},{ -7, 12},{ 0, 14},{ 14, -2}, +{ -9, 11},{ -6, 13},{-14, -4},{ -5,-14},{ 5, 14},{-15, -1},{-14, -6},{ 3,-15}, +{ 11,-11},{ -7, 14},{ -5, 15},{ 8,-14},{ 15, 6},{ 3, 16},{ 7,-15},{-16, 5}, +{ 0, 17},{-16, -6},{-10, 14},{-16, 7},{ 12, 13},{-16, 8},{-17, 6},{-18, 3}, +{ -7, 17},{ 15, 11},{ 16, 10},{ 2,-19},{ 3,-19},{-11,-16},{-18, 8},{-19, -6}, +{ 2,-20},{-17,-11},{-10,-18},{ 8, 19},{-21, -1},{-20, 7},{ -4, 21},{ 21, 5}, +{ 15, 16},{ 2,-22},{-10,-20},{-22, 5},{ 20,-11},{ -7,-22},{-12, 20},{ 23, -5}, +{ 13,-20},{ 24, -2},{-15, 19},{-11, 22},{ 16, 19},{ 23,-10},{-18,-18},{ -9,-24}, +{ 24,-10},{ -3, 26},{-23, 13},{-18,-20},{ 17, 21},{ -4, 27},{ 27, 6},{ 1,-28}, +{-11, 26},{-17,-23},{ 7, 28},{ 11,-27},{ 29, 5},{-23,-19},{-28,-11},{-21, 22}, +{-30, 7},{-17, 26},{-27, 16},{ 13, 29},{ 19,-26},{ 10,-31},{-14,-30},{ 20,-27}, +{-29, 18},{-16,-31},{-28,-22},{ 21,-30},{-25, 28},{ 26,-29},{ 25,-32},{-32,-32} +}; + +// this is simply the scaled down elementwise product of the standard jpeg quantizer table and the AAN premul table +static const uint8_t dequant_table[64]={ + 16, 15, 13, 19, 24, 31, 28, 17, + 17, 23, 25, 31, 36, 63, 45, 21, + 18, 24, 27, 37, 52, 59, 49, 20, + 16, 28, 34, 40, 60, 80, 51, 20, + 18, 31, 48, 66, 68, 86, 56, 21, + 19, 38, 56, 59, 64, 64, 48, 20, + 27, 48, 55, 55, 56, 51, 35, 15, + 20, 35, 34, 32, 31, 22, 15, 8, +}; + +static VLC block_type_vlc[4]; + + +typedef struct CFrameBuffer{ + int allocated_size; + int size; + int id; + uint8_t *data; +}CFrameBuffer; + +typedef struct FourXContext{ + AVCodecContext *avctx; + DSPContext dsp; + AVFrame current_picture, last_picture; + GetBitContext pre_gb; ///< ac/dc prefix + GetBitContext gb; + uint8_t *bytestream; + uint16_t *wordstream; + int mv[256]; + VLC pre_vlc; + int last_dc; + DCTELEM __align8 block[6][64]; + uint8_t *bitstream_buffer; + int bitstream_buffer_size; + CFrameBuffer cfrm[CFRAME_BUFFER_COUNT]; +} FourXContext; + + +#define FIX_1_082392200 70936 +#define FIX_1_414213562 92682 +#define FIX_1_847759065 121095 +#define FIX_2_613125930 171254 + +#define MULTIPLY(var,const) (((var)*(const)) >> 16) + +static void idct(DCTELEM block[64]){ + int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7; + int tmp10, tmp11, tmp12, tmp13; + int z5, z10, z11, z12, z13; + int i; + int temp[64]; + + for(i=0; i<8; i++){ + tmp10 = block[8*0 + i] + block[8*4 + i]; + tmp11 = block[8*0 + i] - block[8*4 + i]; + + tmp13 = block[8*2 + i] + block[8*6 + i]; + tmp12 = MULTIPLY(block[8*2 + i] - block[8*6 + i], FIX_1_414213562) - tmp13; + + tmp0 = tmp10 + tmp13; + tmp3 = tmp10 - tmp13; + tmp1 = tmp11 + tmp12; + tmp2 = tmp11 - tmp12; + + z13 = block[8*5 + i] + block[8*3 + i]; + z10 = block[8*5 + i] - block[8*3 + i]; + z11 = block[8*1 + i] + block[8*7 + i]; + z12 = block[8*1 + i] - block[8*7 + i]; + + tmp7 = z11 + z13; + tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); + + z5 = MULTIPLY(z10 + z12, FIX_1_847759065); + tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; + tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; + + tmp6 = tmp12 - tmp7; + tmp5 = tmp11 - tmp6; + tmp4 = tmp10 + tmp5; + + temp[8*0 + i] = tmp0 + tmp7; + temp[8*7 + i] = tmp0 - tmp7; + temp[8*1 + i] = tmp1 + tmp6; + temp[8*6 + i] = tmp1 - tmp6; + temp[8*2 + i] = tmp2 + tmp5; + temp[8*5 + i] = tmp2 - tmp5; + temp[8*4 + i] = tmp3 + tmp4; + temp[8*3 + i] = tmp3 - tmp4; + } + + for(i=0; i<8*8; i+=8){ + tmp10 = temp[0 + i] + temp[4 + i]; + tmp11 = temp[0 + i] - temp[4 + i]; + + tmp13 = temp[2 + i] + temp[6 + i]; + tmp12 = MULTIPLY(temp[2 + i] - temp[6 + i], FIX_1_414213562) - tmp13; + + tmp0 = tmp10 + tmp13; + tmp3 = tmp10 - tmp13; + tmp1 = tmp11 + tmp12; + tmp2 = tmp11 - tmp12; + + z13 = temp[5 + i] + temp[3 + i]; + z10 = temp[5 + i] - temp[3 + i]; + z11 = temp[1 + i] + temp[7 + i]; + z12 = temp[1 + i] - temp[7 + i]; + + tmp7 = z11 + z13; + tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); + + z5 = MULTIPLY(z10 + z12, FIX_1_847759065); + tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; + tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; + + tmp6 = tmp12 - tmp7; + tmp5 = tmp11 - tmp6; + tmp4 = tmp10 + tmp5; + + block[0 + i] = (tmp0 + tmp7)>>6; + block[7 + i] = (tmp0 - tmp7)>>6; + block[1 + i] = (tmp1 + tmp6)>>6; + block[6 + i] = (tmp1 - tmp6)>>6; + block[2 + i] = (tmp2 + tmp5)>>6; + block[5 + i] = (tmp2 - tmp5)>>6; + block[4 + i] = (tmp3 + tmp4)>>6; + block[3 + i] = (tmp3 - tmp4)>>6; + } +} + +static void init_vlcs(FourXContext *f){ + static int done = 0; + int i; + + if (!done) { + done = 1; + + for(i=0; i<4; i++){ + init_vlc(&block_type_vlc[i], BLOCK_TYPE_VLC_BITS, 7, + &block_type_tab[i][0][1], 2, 1, + &block_type_tab[i][0][0], 2, 1); + } + } +} + +static void init_mv(FourXContext *f){ + int i; + + for(i=0; i<256; i++){ + f->mv[i] = mv[i][0] + mv[i][1]*f->current_picture.linesize[0]/2; + } +} + +static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, int dc){ + int i; + dc*= 0x10001; + + switch(log2w){ + case 0: + for(i=0; i<h; i++){ + dst[0] = scale*src[0] + dc; + if(scale) src += stride; + dst += stride; + } + break; + case 1: + for(i=0; i<h; i++){ + ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc; + if(scale) src += stride; + dst += stride; + } + break; + case 2: + for(i=0; i<h; i++){ + ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc; + ((uint32_t*)dst)[1] = scale*((uint32_t*)src)[1] + dc; + if(scale) src += stride; + dst += stride; + } + break; + case 3: + for(i=0; i<h; i++){ + ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc; + ((uint32_t*)dst)[1] = scale*((uint32_t*)src)[1] + dc; + ((uint32_t*)dst)[2] = scale*((uint32_t*)src)[2] + dc; + ((uint32_t*)dst)[3] = scale*((uint32_t*)src)[3] + dc; + if(scale) src += stride; + dst += stride; + } + break; + default: assert(0); + } +} + +static void decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src, int log2w, int log2h, int stride){ + const int index= size2index[log2h][log2w]; + const int h= 1<<log2h; + int code= get_vlc2(&f->gb, block_type_vlc[index].table, BLOCK_TYPE_VLC_BITS, 1); + + assert(code>=0 && code<=6); + + if(code == 0){ + src += f->mv[ *f->bytestream++ ]; + mcdc(dst, src, log2w, h, stride, 1, 0); + }else if(code == 1){ + log2h--; + decode_p_block(f, dst , src , log2w, log2h, stride); + decode_p_block(f, dst + (stride<<log2h), src + (stride<<log2h), log2w, log2h, stride); + }else if(code == 2){ + log2w--; + decode_p_block(f, dst , src , log2w, log2h, stride); + decode_p_block(f, dst + (1<<log2w), src + (1<<log2w), log2w, log2h, stride); + }else if(code == 4){ + src += f->mv[ *f->bytestream++ ]; + mcdc(dst, src, log2w, h, stride, 1, le2me_16(*f->wordstream++)); + }else if(code == 5){ + mcdc(dst, src, log2w, h, stride, 0, le2me_16(*f->wordstream++)); + }else if(code == 6){ + if(log2w){ + dst[0] = le2me_16(*f->wordstream++); + dst[1] = le2me_16(*f->wordstream++); + }else{ + dst[0 ] = le2me_16(*f->wordstream++); + dst[stride] = le2me_16(*f->wordstream++); + } + } +} + +static int get32(void *p){ + return le2me_32(*(uint32_t*)p); +} + +static int decode_p_frame(FourXContext *f, uint8_t *buf, int length){ + int x, y; + const int width= f->avctx->width; + const int height= f->avctx->height; + uint16_t *src= (uint16_t*)f->last_picture.data[0]; + uint16_t *dst= (uint16_t*)f->current_picture.data[0]; + const int stride= f->current_picture.linesize[0]>>1; + const int bitstream_size= get32(buf+8); + const int bytestream_size= get32(buf+16); + const int wordstream_size= get32(buf+12); + + if(bitstream_size+ bytestream_size+ wordstream_size + 20 != length) + printf("lengths %d %d %d %d\n", bitstream_size, bytestream_size, wordstream_size, + bitstream_size+ bytestream_size+ wordstream_size - length); + + f->bitstream_buffer= av_fast_realloc(f->bitstream_buffer, &f->bitstream_buffer_size, bitstream_size + FF_INPUT_BUFFER_PADDING_SIZE); + f->dsp.bswap_buf((uint32_t*)f->bitstream_buffer, (uint32_t*)(buf + 20), bitstream_size/4); + init_get_bits(&f->gb, f->bitstream_buffer, 8*bitstream_size); + + f->wordstream= (uint16_t*)(buf + 20 + bitstream_size); + f->bytestream= buf + 20 + bitstream_size + wordstream_size; + + init_mv(f); + + for(y=0; y<height; y+=8){ + for(x=0; x<width; x+=8){ + decode_p_block(f, dst + x, src + x, 3, 3, stride); + } + src += 8*stride; + dst += 8*stride; + } + + if(bitstream_size != (get_bits_count(&f->gb)+31)/32*4) + printf(" %d %d %d bytes left\n", + bitstream_size - (get_bits_count(&f->gb)+31)/32*4, + bytestream_size - (f->bytestream - (buf + 20 + bitstream_size + wordstream_size)), + wordstream_size - (((uint8_t*)f->wordstream) - (buf + 20 + bitstream_size)) + ); + + return 0; +} + +/** + * decode block and dequantize. + * Note this is allmost identical to mjpeg + */ +static int decode_i_block(FourXContext *f, DCTELEM *block){ + int code, i, j, level, val; + + /* DC coef */ + val = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3); + if (val>>4){ + printf("error dc run != 0\n"); + } + + if(val) + val = get_xbits(&f->gb, val); + + val = val * dequant_table[0] + f->last_dc; + f->last_dc = + block[0] = val; + /* AC coefs */ + i = 1; + for(;;) { + code = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3); + + /* EOB */ + if (code == 0) + break; + if (code == 0xf0) { + i += 16; + } else { + level = get_xbits(&f->gb, code & 0xf); + i += code >> 4; + if (i >= 64) { + printf("run %d oveflow\n", i); + return 0; + } + + j= ff_zigzag_direct[i]; + block[j] = level * dequant_table[j]; + i++; + if (i >= 64) + break; + } + } + + return 0; +} + +static inline void idct_put(FourXContext *f, int x, int y){ + DCTELEM (*block)[64]= f->block; + int stride= f->current_picture.linesize[0]>>1; + int i; + uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x; + + for(i=0; i<6; i++) idct(block[i]); + + for(y=0; y<8; y++){ + for(x=0; x<8; x++){ + DCTELEM *temp= block[(x>>2) + 2*(y>>2)] + 2*(x&3) + 2*8*(y&3); //FIXME optimize + int cb= block[4][x + 8*y] + 0x80; + int cr= block[5][x + 8*y] + 0x80; + int cg= (cb + cr)>>1; + int y; + + cb+=cb - 0x80; + + y = temp[0]; + dst[0 ]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); + y = temp[1]; + dst[1 ]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); + y = temp[8]; + dst[ stride]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); + y = temp[9]; + dst[1+stride]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); + dst += 2; + } + dst += 2*stride - 2*8; + } +// if(!(f->avctx->flags&CODEC_FLAG_GRAY)){ +} + +static int decode_i_mb(FourXContext *f){ + int i; + + f->dsp.clear_blocks(f->block[0]); + + for(i=0; i<6; i++){ + if(decode_i_block(f, f->block[i]) < 0) + return -1; + } + + return 0; +} + +static uint8_t *read_huffman_tables(FourXContext *f, uint8_t * const buf){ + int frequency[512]; + uint8_t flag[512]; + int up[512]; + uint8_t len_tab[257]; + int bits_tab[257]; + int start, end; + uint8_t *ptr= buf; + int j; + + memset(frequency, 0, sizeof(frequency)); + memset(up, -1, sizeof(up)); + + start= *ptr++; + end= *ptr++; + for(;;){ + int i; + + for(i=start; i<=end; i++){ + frequency[i]= *ptr++; +// printf("%d %d %d\n", start, end, frequency[i]); + } + start= *ptr++; + if(start==0) break; + + end= *ptr++; + } + frequency[256]=1; + + while((ptr - buf)&3) ptr++; // 4byte align + +// for(j=0; j<16; j++) +// printf("%2X", ptr[j]); + + for(j=257; j<512; j++){ + int smallest[2]= {-1,-1}; + int i; + for(i=0; i<j; i++){ + if(frequency[i] == 0) continue; + if(frequency[i] < frequency[ smallest[1] ]){ + if(frequency[i] < frequency[ smallest[0] ]){ + smallest[1]= smallest[0]; + smallest[0]= i; + }else + smallest[1]= i; + } + } + + if(smallest[1] == -1) break; + + frequency[j]= frequency[ smallest[0] ] + frequency[ smallest[1] ]; + flag[ smallest[0] ]= 0; + flag[ smallest[1] ]= 1; + up[ smallest[0] ]= + up[ smallest[1] ]= j; + frequency[ smallest[0] ]= frequency[ smallest[1] ]= 0; + } + + for(j=0; j<257; j++){ + int node; + int len=0; + int bits=0; + + for(node= j; up[node] != -1; node= up[node]){ + bits += flag[node]<<len; + len++; + if(len > 31) printf("vlc length overflow\n"); //can this happen at all ? + } + + bits_tab[j]= bits; + len_tab[j]= len; + } + + init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257, + len_tab , 1, 1, + bits_tab, 4, 4); + + return ptr; +} + +static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){ + int x, y; + const int width= f->avctx->width; + const int height= f->avctx->height; + uint16_t *dst= (uint16_t*)f->current_picture.data[0]; + const int stride= f->current_picture.linesize[0]>>1; + const int bitstream_size= get32(buf); + const int token_count= get32(buf + bitstream_size + 8); + int prestream_size= 4*get32(buf + bitstream_size + 4); + uint8_t *prestream= buf + bitstream_size + 12; + + if(prestream_size + bitstream_size + 12 != length) + fprintf(stderr, "size missmatch %d %d %d\n", prestream_size, bitstream_size, length); + + prestream= read_huffman_tables(f, prestream); + + init_get_bits(&f->gb, buf + 4, 8*bitstream_size); + + prestream_size= length + buf - prestream; + + f->bitstream_buffer= av_fast_realloc(f->bitstream_buffer, &f->bitstream_buffer_size, prestream_size + FF_INPUT_BUFFER_PADDING_SIZE); + f->dsp.bswap_buf((uint32_t*)f->bitstream_buffer, (uint32_t*)prestream, prestream_size/4); + init_get_bits(&f->pre_gb, f->bitstream_buffer, 8*prestream_size); + + f->last_dc= 0*128*8*8; + + for(y=0; y<height; y+=16){ + for(x=0; x<width; x+=16){ + if(decode_i_mb(f) < 0) + return -1; + + idct_put(f, x, y); + } + dst += 16*stride; + } + + if(get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256) + printf("end missmatch\n"); + + return 0; +} + +static int decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + uint8_t *buf, int buf_size) +{ + FourXContext * const f = avctx->priv_data; + AVFrame *picture = data; + AVFrame *p, temp; + int i, frame_4cc, frame_size; + + *data_size = 0; + + /* special case for last picture */ + if (buf_size == 0) { + return 0; + } + + frame_4cc= get32(buf); + if(buf_size != get32(buf+4)+8){ + fprintf(stderr, "size missmatch %d %d\n", buf_size, get32(buf+4)); + } + + if(frame_4cc == ff_get_fourcc("cfrm")){ + int free_index=-1; + const int data_size= buf_size - 20; + const int id= get32(buf+12); + const int whole_size= get32(buf+16); + CFrameBuffer *cfrm; + + for(i=0; i<CFRAME_BUFFER_COUNT; i++){ + if(f->cfrm[i].id && f->cfrm[i].id < avctx->frame_number) + printf("lost c frame %d\n", f->cfrm[i].id); + } + + for(i=0; i<CFRAME_BUFFER_COUNT; i++){ + if(f->cfrm[i].id == id) break; + if(f->cfrm[i].size == 0 ) free_index= i; + } + + if(i>=CFRAME_BUFFER_COUNT){ + i= free_index; + f->cfrm[i].id= id; + } + cfrm= &f->cfrm[i]; + + cfrm->data= av_fast_realloc(cfrm->data, &cfrm->allocated_size, cfrm->size + data_size + FF_INPUT_BUFFER_PADDING_SIZE); + + memcpy(cfrm->data + cfrm->size, buf+20, data_size); + cfrm->size += data_size; + + if(cfrm->size >= whole_size){ + buf= cfrm->data; + frame_size= cfrm->size; + + if(id != avctx->frame_number){ + printf("cframe id missmatch %d %d\n", id, avctx->frame_number); + } + + cfrm->size= cfrm->id= 0; + frame_4cc= ff_get_fourcc("pfrm"); + }else + return buf_size; + }else{ + buf= buf + 12; + frame_size= buf_size - 12; + } + + temp= f->current_picture; + f->current_picture= f->last_picture; + f->last_picture= temp; + + p= &f->current_picture; + avctx->coded_frame= p; + + avctx->flags |= CODEC_FLAG_EMU_EDGE; // alternatively we would have to use our own buffer management + + if(p->data[0]) + avctx->release_buffer(avctx, p); + + p->reference= 1; + if(avctx->get_buffer(avctx, p) < 0){ + fprintf(stderr, "get_buffer() failed\n"); + return -1; + } + + if(frame_4cc == ff_get_fourcc("ifrm")){ + p->pict_type= I_TYPE; + if(decode_i_frame(f, buf, frame_size) < 0) + return -1; + }else if(frame_4cc == ff_get_fourcc("pfrm")){ + p->pict_type= P_TYPE; + if(decode_p_frame(f, buf, frame_size) < 0) + return -1; + }else if(frame_4cc == ff_get_fourcc("snd_")){ + printf("ignoring snd_ chunk length:%d\n", buf_size); + }else{ + printf("ignoring unknown chunk length:%d\n", buf_size); + } + +#if 0 +for(i=0; i<20; i++){ + printf("%2X %c ", buf[i], clip(buf[i],16,126)); +} +#endif + + p->key_frame= p->pict_type == I_TYPE; + + *picture= *p; + *data_size = sizeof(AVPicture); + + emms_c(); + + return buf_size; +} + + +static void common_init(AVCodecContext *avctx){ + FourXContext * const f = avctx->priv_data; + + dsputil_init(&f->dsp, avctx); + + f->avctx= avctx; +} + +static int decode_init(AVCodecContext *avctx){ + FourXContext * const f = avctx->priv_data; + + common_init(avctx); + init_vlcs(f); + + avctx->pix_fmt= PIX_FMT_RGB565; + + return 0; +} + + +static int decode_end(AVCodecContext *avctx){ + FourXContext * const f = avctx->priv_data; + int i; + + av_freep(&f->bitstream_buffer); + f->bitstream_buffer_size=0; + for(i=0; i<CFRAME_BUFFER_COUNT; i++){ + av_freep(&f->cfrm[i].data); + f->cfrm[i].allocated_size= 0; + } + free_vlc(&f->pre_vlc); + + avcodec_default_free_buffers(avctx); + + return 0; +} + +AVCodec fourxm_decoder = { + "4xm", + CODEC_TYPE_VIDEO, + CODEC_ID_4XM, + sizeof(FourXContext), + decode_init, + NULL, + decode_end, + decode_frame, + /*CODEC_CAP_DR1,*/ +}; + diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 3ea0024..39566b3 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -17,7 +17,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \ mpeg12.o mpegaudiodec.o pcm.o simple_idct.o \ ratecontrol.o adpcm.o eval.o dv.o error_resilience.o \ fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \ - vp3.o asv1.o + vp3.o asv1.o 4xm.o cabac.o ifeq ($(AMR_NB),yes) OBJS+= amr.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index c8742b8..980a470 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -105,6 +105,7 @@ void avcodec_register_all(void) register_avcodec(&h264_decoder); register_avcodec(&vp3_decoder); register_avcodec(&asv1_decoder); + register_avcodec(&fourxm_decoder); #ifdef CONFIG_AC3 register_avcodec(&ac3_decoder); #endif diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 49a2ebd..7ed71c5 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -1248,6 +1248,7 @@ extern AVCodec amr_nb_decoder; extern AVCodec aac_decoder; extern AVCodec mpeg4aac_decoder; extern AVCodec asv1_decoder; +extern AVCodec fourxm_decoder; /* pcm codecs */ #define PCM_CODEC(id, name) \ |