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libavcodec/pngdec.c

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00001 /*
00002  * PNG image format
00003  * Copyright (c) 2003 Fabrice Bellard
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 #include "avcodec.h"
00022 #include "bytestream.h"
00023 #include "png.h"
00024 #include "dsputil.h"
00025 
00026 /* TODO:
00027  * - add 2, 4 and 16 bit depth support
00028  */
00029 
00030 #include <zlib.h>
00031 
00032 //#define DEBUG
00033 
00034 typedef struct PNGDecContext {
00035     DSPContext dsp;
00036 
00037     const uint8_t *bytestream;
00038     const uint8_t *bytestream_start;
00039     const uint8_t *bytestream_end;
00040     AVFrame picture;
00041 
00042     int state;
00043     int width, height;
00044     int bit_depth;
00045     int color_type;
00046     int compression_type;
00047     int interlace_type;
00048     int filter_type;
00049     int channels;
00050     int bits_per_pixel;
00051     int bpp;
00052 
00053     uint8_t *image_buf;
00054     int image_linesize;
00055     uint32_t palette[256];
00056     uint8_t *crow_buf;
00057     uint8_t *last_row;
00058     uint8_t *tmp_row;
00059     int pass;
00060     int crow_size; /* compressed row size (include filter type) */
00061     int row_size; /* decompressed row size */
00062     int pass_row_size; /* decompress row size of the current pass */
00063     int y;
00064     z_stream zstream;
00065 } PNGDecContext;
00066 
00067 /* Mask to determine which y pixels can be written in a pass */
00068 static const uint8_t png_pass_dsp_ymask[NB_PASSES] = {
00069     0xff, 0xff, 0x0f, 0xcc, 0x33, 0xff, 0x55,
00070 };
00071 
00072 /* Mask to determine which pixels to overwrite while displaying */
00073 static const uint8_t png_pass_dsp_mask[NB_PASSES] = {
00074     0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff
00075 };
00076 
00077 /* NOTE: we try to construct a good looking image at each pass. width
00078    is the original image width. We also do pixel format conversion at
00079    this stage */
00080 static void png_put_interlaced_row(uint8_t *dst, int width,
00081                                    int bits_per_pixel, int pass,
00082                                    int color_type, const uint8_t *src)
00083 {
00084     int x, mask, dsp_mask, j, src_x, b, bpp;
00085     uint8_t *d;
00086     const uint8_t *s;
00087 
00088     mask = ff_png_pass_mask[pass];
00089     dsp_mask = png_pass_dsp_mask[pass];
00090     switch(bits_per_pixel) {
00091     case 1:
00092         /* we must initialize the line to zero before writing to it */
00093         if (pass == 0)
00094             memset(dst, 0, (width + 7) >> 3);
00095         src_x = 0;
00096         for(x = 0; x < width; x++) {
00097             j = (x & 7);
00098             if ((dsp_mask << j) & 0x80) {
00099                 b = (src[src_x >> 3] >> (7 - (src_x & 7))) & 1;
00100                 dst[x >> 3] |= b << (7 - j);
00101             }
00102             if ((mask << j) & 0x80)
00103                 src_x++;
00104         }
00105         break;
00106     default:
00107         bpp = bits_per_pixel >> 3;
00108         d = dst;
00109         s = src;
00110         if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
00111             for(x = 0; x < width; x++) {
00112                 j = x & 7;
00113                 if ((dsp_mask << j) & 0x80) {
00114                     *(uint32_t *)d = (s[3] << 24) | (s[0] << 16) | (s[1] << 8) | s[2];
00115                 }
00116                 d += bpp;
00117                 if ((mask << j) & 0x80)
00118                     s += bpp;
00119             }
00120         } else {
00121             for(x = 0; x < width; x++) {
00122                 j = x & 7;
00123                 if ((dsp_mask << j) & 0x80) {
00124                     memcpy(d, s, bpp);
00125                 }
00126                 d += bpp;
00127                 if ((mask << j) & 0x80)
00128                     s += bpp;
00129             }
00130         }
00131         break;
00132     }
00133 }
00134 
00135 void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)
00136 {
00137     int i;
00138     for(i = 0; i < w; i++) {
00139         int a, b, c, p, pa, pb, pc;
00140 
00141         a = dst[i - bpp];
00142         b = top[i];
00143         c = top[i - bpp];
00144 
00145         p = b - c;
00146         pc = a - c;
00147 
00148         pa = abs(p);
00149         pb = abs(pc);
00150         pc = abs(p + pc);
00151 
00152         if (pa <= pb && pa <= pc)
00153             p = a;
00154         else if (pb <= pc)
00155             p = b;
00156         else
00157             p = c;
00158         dst[i] = p + src[i];
00159     }
00160 }
00161 
00162 #define UNROLL1(bpp, op) {\
00163                  r = dst[0];\
00164     if(bpp >= 2) g = dst[1];\
00165     if(bpp >= 3) b = dst[2];\
00166     if(bpp >= 4) a = dst[3];\
00167     for(; i < size; i+=bpp) {\
00168         dst[i+0] = r = op(r, src[i+0], last[i+0]);\
00169         if(bpp == 1) continue;\
00170         dst[i+1] = g = op(g, src[i+1], last[i+1]);\
00171         if(bpp == 2) continue;\
00172         dst[i+2] = b = op(b, src[i+2], last[i+2]);\
00173         if(bpp == 3) continue;\
00174         dst[i+3] = a = op(a, src[i+3], last[i+3]);\
00175     }\
00176 }
00177 
00178 #define UNROLL_FILTER(op)\
00179          if(bpp == 1) UNROLL1(1, op)\
00180     else if(bpp == 2) UNROLL1(2, op)\
00181     else if(bpp == 3) UNROLL1(3, op)\
00182     else if(bpp == 4) UNROLL1(4, op)\
00183 
00184 /* NOTE: 'dst' can be equal to 'last' */
00185 static void png_filter_row(DSPContext *dsp, uint8_t *dst, int filter_type,
00186                            uint8_t *src, uint8_t *last, int size, int bpp)
00187 {
00188     int i, p, r, g, b, a;
00189 
00190     switch(filter_type) {
00191     case PNG_FILTER_VALUE_NONE:
00192         memcpy(dst, src, size);
00193         break;
00194     case PNG_FILTER_VALUE_SUB:
00195         for(i = 0; i < bpp; i++) {
00196             dst[i] = src[i];
00197         }
00198         if(bpp == 4) {
00199             p = *(int*)dst;
00200             for(; i < size; i+=bpp) {
00201                 int s = *(int*)(src+i);
00202                 p = ((s&0x7f7f7f7f) + (p&0x7f7f7f7f)) ^ ((s^p)&0x80808080);
00203                 *(int*)(dst+i) = p;
00204             }
00205         } else {
00206 #define OP_SUB(x,s,l) x+s
00207             UNROLL_FILTER(OP_SUB);
00208         }
00209         break;
00210     case PNG_FILTER_VALUE_UP:
00211         dsp->add_bytes_l2(dst, src, last, size);
00212         break;
00213     case PNG_FILTER_VALUE_AVG:
00214         for(i = 0; i < bpp; i++) {
00215             p = (last[i] >> 1);
00216             dst[i] = p + src[i];
00217         }
00218 #define OP_AVG(x,s,l) (((x + l) >> 1) + s) & 0xff
00219         UNROLL_FILTER(OP_AVG);
00220         break;
00221     case PNG_FILTER_VALUE_PAETH:
00222         for(i = 0; i < bpp; i++) {
00223             p = last[i];
00224             dst[i] = p + src[i];
00225         }
00226         if(bpp > 1 && size > 4) {
00227             // would write off the end of the array if we let it process the last pixel with bpp=3
00228             int w = bpp==4 ? size : size-3;
00229             dsp->add_png_paeth_prediction(dst+i, src+i, last+i, w-i, bpp);
00230             i = w;
00231         }
00232         ff_add_png_paeth_prediction(dst+i, src+i, last+i, size-i, bpp);
00233         break;
00234     }
00235 }
00236 
00237 static av_always_inline void convert_to_rgb32_loco(uint8_t *dst, const uint8_t *src, int width, int loco)
00238 {
00239     int j;
00240     unsigned int r, g, b, a;
00241 
00242     for(j = 0;j < width; j++) {
00243         r = src[0];
00244         g = src[1];
00245         b = src[2];
00246         a = src[3];
00247         if(loco) {
00248             r = (r+g)&0xff;
00249             b = (b+g)&0xff;
00250         }
00251         *(uint32_t *)dst = (a << 24) | (r << 16) | (g << 8) | b;
00252         dst += 4;
00253         src += 4;
00254     }
00255 }
00256 
00257 static void convert_to_rgb32(uint8_t *dst, const uint8_t *src, int width, int loco)
00258 {
00259     if(loco)
00260         convert_to_rgb32_loco(dst, src, width, 1);
00261     else
00262         convert_to_rgb32_loco(dst, src, width, 0);
00263 }
00264 
00265 static void deloco_rgb24(uint8_t *dst, int size)
00266 {
00267     int i;
00268     for(i=0; i<size; i+=3) {
00269         int g = dst[i+1];
00270         dst[i+0] += g;
00271         dst[i+2] += g;
00272     }
00273 }
00274 
00275 /* process exactly one decompressed row */
00276 static void png_handle_row(PNGDecContext *s)
00277 {
00278     uint8_t *ptr, *last_row;
00279     int got_line;
00280 
00281     if (!s->interlace_type) {
00282         ptr = s->image_buf + s->image_linesize * s->y;
00283         /* need to swap bytes correctly for RGB_ALPHA */
00284         if (s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
00285             png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1,
00286                            s->last_row, s->row_size, s->bpp);
00287             convert_to_rgb32(ptr, s->tmp_row, s->width, s->filter_type == PNG_FILTER_TYPE_LOCO);
00288             FFSWAP(uint8_t*, s->last_row, s->tmp_row);
00289         } else {
00290             /* in normal case, we avoid one copy */
00291             if (s->y == 0)
00292                 last_row = s->last_row;
00293             else
00294                 last_row = ptr - s->image_linesize;
00295 
00296             png_filter_row(&s->dsp, ptr, s->crow_buf[0], s->crow_buf + 1,
00297                            last_row, s->row_size, s->bpp);
00298         }
00299         /* loco lags by 1 row so that it doesn't interfere with top prediction */
00300         if (s->filter_type == PNG_FILTER_TYPE_LOCO &&
00301             s->color_type == PNG_COLOR_TYPE_RGB && s->y > 0)
00302             deloco_rgb24(ptr - s->image_linesize, s->row_size);
00303         s->y++;
00304         if (s->y == s->height) {
00305             s->state |= PNG_ALLIMAGE;
00306             if (s->filter_type == PNG_FILTER_TYPE_LOCO &&
00307                 s->color_type == PNG_COLOR_TYPE_RGB)
00308                 deloco_rgb24(ptr, s->row_size);
00309         }
00310     } else {
00311         got_line = 0;
00312         for(;;) {
00313             ptr = s->image_buf + s->image_linesize * s->y;
00314             if ((ff_png_pass_ymask[s->pass] << (s->y & 7)) & 0x80) {
00315                 /* if we already read one row, it is time to stop to
00316                    wait for the next one */
00317                 if (got_line)
00318                     break;
00319                 png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1,
00320                                s->last_row, s->pass_row_size, s->bpp);
00321                 FFSWAP(uint8_t*, s->last_row, s->tmp_row);
00322                 got_line = 1;
00323             }
00324             if ((png_pass_dsp_ymask[s->pass] << (s->y & 7)) & 0x80) {
00325                 /* NOTE: RGB32 is handled directly in png_put_interlaced_row */
00326                 png_put_interlaced_row(ptr, s->width, s->bits_per_pixel, s->pass,
00327                                        s->color_type, s->last_row);
00328             }
00329             s->y++;
00330             if (s->y == s->height) {
00331                 for(;;) {
00332                     if (s->pass == NB_PASSES - 1) {
00333                         s->state |= PNG_ALLIMAGE;
00334                         goto the_end;
00335                     } else {
00336                         s->pass++;
00337                         s->y = 0;
00338                         s->pass_row_size = ff_png_pass_row_size(s->pass,
00339                                                              s->bits_per_pixel,
00340                                                              s->width);
00341                         s->crow_size = s->pass_row_size + 1;
00342                         if (s->pass_row_size != 0)
00343                             break;
00344                         /* skip pass if empty row */
00345                     }
00346                 }
00347             }
00348         }
00349     the_end: ;
00350     }
00351 }
00352 
00353 static int png_decode_idat(PNGDecContext *s, int length)
00354 {
00355     int ret;
00356     s->zstream.avail_in = length;
00357     s->zstream.next_in = s->bytestream;
00358     s->bytestream += length;
00359 
00360     if(s->bytestream > s->bytestream_end)
00361         return -1;
00362 
00363     /* decode one line if possible */
00364     while (s->zstream.avail_in > 0) {
00365         ret = inflate(&s->zstream, Z_PARTIAL_FLUSH);
00366         if (ret != Z_OK && ret != Z_STREAM_END) {
00367             return -1;
00368         }
00369         if (s->zstream.avail_out == 0) {
00370             if (!(s->state & PNG_ALLIMAGE)) {
00371                 png_handle_row(s);
00372             }
00373             s->zstream.avail_out = s->crow_size;
00374             s->zstream.next_out = s->crow_buf;
00375         }
00376     }
00377     return 0;
00378 }
00379 
00380 static int decode_frame(AVCodecContext *avctx,
00381                         void *data, int *data_size,
00382                         const uint8_t *buf, int buf_size)
00383 {
00384     PNGDecContext * const s = avctx->priv_data;
00385     AVFrame *picture = data;
00386     AVFrame * const p= &s->picture;
00387     uint32_t tag, length;
00388     int ret, crc;
00389 
00390     s->bytestream_start=
00391     s->bytestream= buf;
00392     s->bytestream_end= buf + buf_size;
00393 
00394     /* check signature */
00395     if (memcmp(s->bytestream, ff_pngsig, 8) != 0 &&
00396         memcmp(s->bytestream, ff_mngsig, 8) != 0)
00397         return -1;
00398     s->bytestream+= 8;
00399     s->y=
00400     s->state=0;
00401 //    memset(s, 0, sizeof(PNGDecContext));
00402     /* init the zlib */
00403     s->zstream.zalloc = ff_png_zalloc;
00404     s->zstream.zfree = ff_png_zfree;
00405     s->zstream.opaque = NULL;
00406     ret = inflateInit(&s->zstream);
00407     if (ret != Z_OK)
00408         return -1;
00409     for(;;) {
00410         int tag32;
00411         if (s->bytestream >= s->bytestream_end)
00412             goto fail;
00413         length = bytestream_get_be32(&s->bytestream);
00414         if (length > 0x7fffffff)
00415             goto fail;
00416         tag32 = bytestream_get_be32(&s->bytestream);
00417         tag = bswap_32(tag32);
00418 #ifdef DEBUG
00419         av_log(avctx, AV_LOG_DEBUG, "png: tag=%c%c%c%c length=%u\n",
00420                (tag & 0xff),
00421                ((tag >> 8) & 0xff),
00422                ((tag >> 16) & 0xff),
00423                ((tag >> 24) & 0xff), length);
00424 #endif
00425         switch(tag) {
00426         case MKTAG('I', 'H', 'D', 'R'):
00427             if (length != 13)
00428                 goto fail;
00429             s->width = bytestream_get_be32(&s->bytestream);
00430             s->height = bytestream_get_be32(&s->bytestream);
00431             if(avcodec_check_dimensions(avctx, s->width, s->height)){
00432                 s->width= s->height= 0;
00433                 goto fail;
00434             }
00435             s->bit_depth = *s->bytestream++;
00436             s->color_type = *s->bytestream++;
00437             s->compression_type = *s->bytestream++;
00438             s->filter_type = *s->bytestream++;
00439             s->interlace_type = *s->bytestream++;
00440             crc = bytestream_get_be32(&s->bytestream);
00441             s->state |= PNG_IHDR;
00442 #ifdef DEBUG
00443             av_log(avctx, AV_LOG_DEBUG, "width=%d height=%d depth=%d color_type=%d compression_type=%d filter_type=%d interlace_type=%d\n",
00444                    s->width, s->height, s->bit_depth, s->color_type,
00445                    s->compression_type, s->filter_type, s->interlace_type);
00446 #endif
00447             break;
00448         case MKTAG('I', 'D', 'A', 'T'):
00449             if (!(s->state & PNG_IHDR))
00450                 goto fail;
00451             if (!(s->state & PNG_IDAT)) {
00452                 /* init image info */
00453                 avctx->width = s->width;
00454                 avctx->height = s->height;
00455 
00456                 s->channels = ff_png_get_nb_channels(s->color_type);
00457                 s->bits_per_pixel = s->bit_depth * s->channels;
00458                 s->bpp = (s->bits_per_pixel + 7) >> 3;
00459                 s->row_size = (avctx->width * s->bits_per_pixel + 7) >> 3;
00460 
00461                 if (s->bit_depth == 8 &&
00462                     s->color_type == PNG_COLOR_TYPE_RGB) {
00463                     avctx->pix_fmt = PIX_FMT_RGB24;
00464                 } else if (s->bit_depth == 8 &&
00465                            s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
00466                     avctx->pix_fmt = PIX_FMT_RGB32;
00467                 } else if (s->bit_depth == 8 &&
00468                            s->color_type == PNG_COLOR_TYPE_GRAY) {
00469                     avctx->pix_fmt = PIX_FMT_GRAY8;
00470                 } else if (s->bit_depth == 16 &&
00471                            s->color_type == PNG_COLOR_TYPE_GRAY) {
00472                     avctx->pix_fmt = PIX_FMT_GRAY16BE;
00473                 } else if (s->bit_depth == 1 &&
00474                            s->color_type == PNG_COLOR_TYPE_GRAY) {
00475                     avctx->pix_fmt = PIX_FMT_MONOBLACK;
00476                 } else if (s->bit_depth == 8 &&
00477                            s->color_type == PNG_COLOR_TYPE_PALETTE) {
00478                     avctx->pix_fmt = PIX_FMT_PAL8;
00479                 } else {
00480                     goto fail;
00481                 }
00482                 if(p->data[0])
00483                     avctx->release_buffer(avctx, p);
00484 
00485                 p->reference= 0;
00486                 if(avctx->get_buffer(avctx, p) < 0){
00487                     av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00488                     goto fail;
00489                 }
00490                 p->pict_type= FF_I_TYPE;
00491                 p->key_frame= 1;
00492                 p->interlaced_frame = !!s->interlace_type;
00493 
00494                 /* compute the compressed row size */
00495                 if (!s->interlace_type) {
00496                     s->crow_size = s->row_size + 1;
00497                 } else {
00498                     s->pass = 0;
00499                     s->pass_row_size = ff_png_pass_row_size(s->pass,
00500                                                          s->bits_per_pixel,
00501                                                          s->width);
00502                     s->crow_size = s->pass_row_size + 1;
00503                 }
00504 #ifdef DEBUG
00505                 av_log(avctx, AV_LOG_DEBUG, "row_size=%d crow_size =%d\n",
00506                        s->row_size, s->crow_size);
00507 #endif
00508                 s->image_buf = p->data[0];
00509                 s->image_linesize = p->linesize[0];
00510                 /* copy the palette if needed */
00511                 if (s->color_type == PNG_COLOR_TYPE_PALETTE)
00512                     memcpy(p->data[1], s->palette, 256 * sizeof(uint32_t));
00513                 /* empty row is used if differencing to the first row */
00514                 s->last_row = av_mallocz(s->row_size);
00515                 if (!s->last_row)
00516                     goto fail;
00517                 if (s->interlace_type ||
00518                     s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
00519                     s->tmp_row = av_malloc(s->row_size);
00520                     if (!s->tmp_row)
00521                         goto fail;
00522                 }
00523                 /* compressed row */
00524                 s->crow_buf = av_malloc(s->row_size + 1);
00525                 if (!s->crow_buf)
00526                     goto fail;
00527                 s->zstream.avail_out = s->crow_size;
00528                 s->zstream.next_out = s->crow_buf;
00529             }
00530             s->state |= PNG_IDAT;
00531             if (png_decode_idat(s, length) < 0)
00532                 goto fail;
00533             /* skip crc */
00534             crc = bytestream_get_be32(&s->bytestream);
00535             break;
00536         case MKTAG('P', 'L', 'T', 'E'):
00537             {
00538                 int n, i, r, g, b;
00539 
00540                 if ((length % 3) != 0 || length > 256 * 3)
00541                     goto skip_tag;
00542                 /* read the palette */
00543                 n = length / 3;
00544                 for(i=0;i<n;i++) {
00545                     r = *s->bytestream++;
00546                     g = *s->bytestream++;
00547                     b = *s->bytestream++;
00548                     s->palette[i] = (0xff << 24) | (r << 16) | (g << 8) | b;
00549                 }
00550                 for(;i<256;i++) {
00551                     s->palette[i] = (0xff << 24);
00552                 }
00553                 s->state |= PNG_PLTE;
00554                 crc = bytestream_get_be32(&s->bytestream);
00555             }
00556             break;
00557         case MKTAG('t', 'R', 'N', 'S'):
00558             {
00559                 int v, i;
00560 
00561                 /* read the transparency. XXX: Only palette mode supported */
00562                 if (s->color_type != PNG_COLOR_TYPE_PALETTE ||
00563                     length > 256 ||
00564                     !(s->state & PNG_PLTE))
00565                     goto skip_tag;
00566                 for(i=0;i<length;i++) {
00567                     v = *s->bytestream++;
00568                     s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24);
00569                 }
00570                 crc = bytestream_get_be32(&s->bytestream);
00571             }
00572             break;
00573         case MKTAG('I', 'E', 'N', 'D'):
00574             if (!(s->state & PNG_ALLIMAGE))
00575                 goto fail;
00576             crc = bytestream_get_be32(&s->bytestream);
00577             goto exit_loop;
00578         default:
00579             /* skip tag */
00580         skip_tag:
00581             s->bytestream += length + 4;
00582             break;
00583         }
00584     }
00585  exit_loop:
00586     *picture= s->picture;
00587     *data_size = sizeof(AVFrame);
00588 
00589     ret = s->bytestream - s->bytestream_start;
00590  the_end:
00591     inflateEnd(&s->zstream);
00592     av_freep(&s->crow_buf);
00593     av_freep(&s->last_row);
00594     av_freep(&s->tmp_row);
00595     return ret;
00596  fail:
00597     ret = -1;
00598     goto the_end;
00599 }
00600 
00601 static av_cold int png_dec_init(AVCodecContext *avctx){
00602     PNGDecContext *s = avctx->priv_data;
00603 
00604     avcodec_get_frame_defaults(&s->picture);
00605     avctx->coded_frame= &s->picture;
00606     dsputil_init(&s->dsp, avctx);
00607 
00608     return 0;
00609 }
00610 
00611 AVCodec png_decoder = {
00612     "png",
00613     CODEC_TYPE_VIDEO,
00614     CODEC_ID_PNG,
00615     sizeof(PNGDecContext),
00616     png_dec_init,
00617     NULL,
00618     NULL, //decode_end,
00619     decode_frame,
00620     0 /*CODEC_CAP_DR1*/ /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
00621     NULL,
00622     .long_name = NULL_IF_CONFIG_SMALL("PNG image"),
00623 };

Generated on Sat Feb 16 2013 09:23:13 for ffmpeg by  doxygen 1.7.1