X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2F4xm.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2F4xm.c;h=0000000000000000000000000000000000000000;hb=6fa8f2f38d4b0b35f8539bf94e27ae27015c7689;hp=682143340c8bc423362e777520467a7569b7096e;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/4xm.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/4xm.c deleted file mode 100644 index 6821433..0000000 --- a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/4xm.c +++ /dev/null @@ -1,752 +0,0 @@ -/* - * 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 - -#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; igb, 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<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; ygb)+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<4; i++){ - block[i][0] += 0x80*8*8; - idct(block[i]); - } - - if(!(f->avctx->flags&CODEC_FLAG_GRAY)){ - for(i=4; 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]; - int cr= block[5][x + 8*y]; - int cg= (cb + cr)>>1; - int y; - - cb+=cb; - - 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; - } -} - -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 min_freq[2]= {256*256, 256*256}; - int smallest[2]= {0, 0}; - int i; - for(i=0; i 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 __attribute__((unused)) = 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; ypre_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; icfrm[i].id && f->cfrm[i].id < avctx->frame_number) - printf("lost c frame %d\n", f->cfrm[i].id); - } - - for(i=0; icfrm[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; icfrm[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,*/ -}; -