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00024 #include "avassert.h"
00025 #include "common.h"
00026 #include "imgutils.h"
00027 #include "internal.h"
00028 #include "intreadwrite.h"
00029 #include "log.h"
00030 #include "pixdesc.h"
00031
00032 void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
00033 const AVPixFmtDescriptor *pixdesc)
00034 {
00035 int i;
00036 memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
00037 if (max_pixstep_comps)
00038 memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
00039
00040 for (i = 0; i < 4; i++) {
00041 const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
00042 if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) {
00043 max_pixsteps[comp->plane] = comp->step_minus1+1;
00044 if (max_pixstep_comps)
00045 max_pixstep_comps[comp->plane] = i;
00046 }
00047 }
00048 }
00049
00050 static inline
00051 int image_get_linesize(int width, int plane,
00052 int max_step, int max_step_comp,
00053 const AVPixFmtDescriptor *desc)
00054 {
00055 int s, shifted_w, linesize;
00056
00057 if (!desc)
00058 return AVERROR(EINVAL);
00059
00060 if (width < 0)
00061 return AVERROR(EINVAL);
00062 s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0;
00063 shifted_w = ((width + (1 << s) - 1)) >> s;
00064 if (shifted_w && max_step > INT_MAX / shifted_w)
00065 return AVERROR(EINVAL);
00066 linesize = max_step * shifted_w;
00067
00068 if (desc->flags & PIX_FMT_BITSTREAM)
00069 linesize = (linesize + 7) >> 3;
00070 return linesize;
00071 }
00072
00073 int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
00074 {
00075 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00076 int max_step [4];
00077 int max_step_comp[4];
00078
00079 if ((unsigned)pix_fmt >= AV_PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
00080 return AVERROR(EINVAL);
00081
00082 av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
00083 return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc);
00084 }
00085
00086 int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
00087 {
00088 int i, ret;
00089 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00090 int max_step [4];
00091 int max_step_comp[4];
00092
00093 memset(linesizes, 0, 4*sizeof(linesizes[0]));
00094
00095 if (!desc || desc->flags & PIX_FMT_HWACCEL)
00096 return AVERROR(EINVAL);
00097
00098 av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
00099 for (i = 0; i < 4; i++) {
00100 if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0)
00101 return ret;
00102 linesizes[i] = ret;
00103 }
00104
00105 return 0;
00106 }
00107
00108 int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
00109 uint8_t *ptr, const int linesizes[4])
00110 {
00111 int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 };
00112
00113 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00114 memset(data , 0, sizeof(data[0])*4);
00115
00116 if (!desc || desc->flags & PIX_FMT_HWACCEL)
00117 return AVERROR(EINVAL);
00118
00119 data[0] = ptr;
00120 if (linesizes[0] > (INT_MAX - 1024) / height)
00121 return AVERROR(EINVAL);
00122 size[0] = linesizes[0] * height;
00123
00124 if (desc->flags & PIX_FMT_PAL ||
00125 desc->flags & PIX_FMT_PSEUDOPAL) {
00126 size[0] = (size[0] + 3) & ~3;
00127 data[1] = ptr + size[0];
00128 return size[0] + 256 * 4;
00129 }
00130
00131 for (i = 0; i < 4; i++)
00132 has_plane[desc->comp[i].plane] = 1;
00133
00134 total_size = size[0];
00135 for (i = 1; i < 4 && has_plane[i]; i++) {
00136 int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
00137 data[i] = data[i-1] + size[i-1];
00138 h = (height + (1 << s) - 1) >> s;
00139 if (linesizes[i] > INT_MAX / h)
00140 return AVERROR(EINVAL);
00141 size[i] = h * linesizes[i];
00142 if (total_size > INT_MAX - size[i])
00143 return AVERROR(EINVAL);
00144 total_size += size[i];
00145 }
00146
00147 return total_size;
00148 }
00149
00150 int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
00151 {
00152 int i;
00153
00154 for (i = 0; i < 256; i++) {
00155 int r, g, b;
00156
00157 switch (pix_fmt) {
00158 case AV_PIX_FMT_RGB8:
00159 r = (i>>5 )*36;
00160 g = ((i>>2)&7)*36;
00161 b = (i&3 )*85;
00162 break;
00163 case AV_PIX_FMT_BGR8:
00164 b = (i>>6 )*85;
00165 g = ((i>>3)&7)*36;
00166 r = (i&7 )*36;
00167 break;
00168 case AV_PIX_FMT_RGB4_BYTE:
00169 r = (i>>3 )*255;
00170 g = ((i>>1)&3)*85;
00171 b = (i&1 )*255;
00172 break;
00173 case AV_PIX_FMT_BGR4_BYTE:
00174 b = (i>>3 )*255;
00175 g = ((i>>1)&3)*85;
00176 r = (i&1 )*255;
00177 break;
00178 case AV_PIX_FMT_GRAY8:
00179 r = b = g = i;
00180 break;
00181 default:
00182 return AVERROR(EINVAL);
00183 }
00184 pal[i] = b + (g<<8) + (r<<16) + (0xFFU<<24);
00185 }
00186
00187 return 0;
00188 }
00189
00190 int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
00191 int w, int h, enum AVPixelFormat pix_fmt, int align)
00192 {
00193 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00194 int i, ret;
00195 uint8_t *buf;
00196
00197 if (!desc)
00198 return AVERROR(EINVAL);
00199
00200 if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
00201 return ret;
00202 if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0)
00203 return ret;
00204
00205 for (i = 0; i < 4; i++)
00206 linesizes[i] = FFALIGN(linesizes[i], align);
00207
00208 if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
00209 return ret;
00210 buf = av_malloc(ret + align);
00211 if (!buf)
00212 return AVERROR(ENOMEM);
00213 if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
00214 av_free(buf);
00215 return ret;
00216 }
00217 if (desc->flags & PIX_FMT_PAL || desc->flags & PIX_FMT_PSEUDOPAL)
00218 avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
00219
00220 return ret;
00221 }
00222
00223 typedef struct ImgUtils {
00224 const AVClass *class;
00225 int log_offset;
00226 void *log_ctx;
00227 } ImgUtils;
00228
00229 static const AVClass imgutils_class = { "IMGUTILS", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(ImgUtils, log_offset), offsetof(ImgUtils, log_ctx) };
00230
00231 int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
00232 {
00233 ImgUtils imgutils = { &imgutils_class, log_offset, log_ctx };
00234
00235 if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
00236 return 0;
00237
00238 av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
00239 return AVERROR(EINVAL);
00240 }
00241
00242 void av_image_copy_plane(uint8_t *dst, int dst_linesize,
00243 const uint8_t *src, int src_linesize,
00244 int bytewidth, int height)
00245 {
00246 if (!dst || !src)
00247 return;
00248 av_assert0(abs(src_linesize) >= bytewidth);
00249 av_assert0(abs(dst_linesize) >= bytewidth);
00250 for (;height > 0; height--) {
00251 memcpy(dst, src, bytewidth);
00252 dst += dst_linesize;
00253 src += src_linesize;
00254 }
00255 }
00256
00257 void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
00258 const uint8_t *src_data[4], const int src_linesizes[4],
00259 enum AVPixelFormat pix_fmt, int width, int height)
00260 {
00261 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00262
00263 if (!desc || desc->flags & PIX_FMT_HWACCEL)
00264 return;
00265
00266 if (desc->flags & PIX_FMT_PAL ||
00267 desc->flags & PIX_FMT_PSEUDOPAL) {
00268 av_image_copy_plane(dst_data[0], dst_linesizes[0],
00269 src_data[0], src_linesizes[0],
00270 width, height);
00271
00272 memcpy(dst_data[1], src_data[1], 4*256);
00273 } else {
00274 int i, planes_nb = 0;
00275
00276 for (i = 0; i < desc->nb_components; i++)
00277 planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
00278
00279 for (i = 0; i < planes_nb; i++) {
00280 int h = height;
00281 int bwidth = av_image_get_linesize(pix_fmt, width, i);
00282 if (bwidth < 0) {
00283 av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n");
00284 return;
00285 }
00286 if (i == 1 || i == 2) {
00287 h= -((-height)>>desc->log2_chroma_h);
00288 }
00289 av_image_copy_plane(dst_data[i], dst_linesizes[i],
00290 src_data[i], src_linesizes[i],
00291 bwidth, h);
00292 }
00293 }
00294 }
00295
00296 int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
00297 const uint8_t *src,
00298 enum AVPixelFormat pix_fmt, int width, int height, int align)
00299 {
00300 int ret, i;
00301
00302 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
00303 return ret;
00304
00305 if ((ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width)) < 0)
00306 return ret;
00307
00308 for (i = 0; i < 4; i++)
00309 dst_linesize[i] = FFALIGN(dst_linesize[i], align);
00310
00311 if ((ret = av_image_fill_pointers(dst_data, pix_fmt, width, NULL, dst_linesize)) < 0)
00312 return ret;
00313
00314 return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize);
00315 }
00316
00317 int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
00318 {
00319 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00320 uint8_t *data[4];
00321 int linesize[4];
00322
00323 if (!desc)
00324 return AVERROR(EINVAL);
00325 if (av_image_check_size(width, height, 0, NULL) < 0)
00326 return AVERROR(EINVAL);
00327 if (desc->flags & PIX_FMT_PSEUDOPAL)
00328
00329 return width * height;
00330 return av_image_fill_arrays(data, linesize, NULL, pix_fmt, width, height, align);
00331 }
00332
00333 int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
00334 const uint8_t * const src_data[4], const int src_linesize[4],
00335 enum AVPixelFormat pix_fmt, int width, int height, int align)
00336 {
00337 int i, j, nb_planes = 0, linesize[4];
00338 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
00339 int size = av_image_get_buffer_size(pix_fmt, width, height, align);
00340
00341 if (size > dst_size || size < 0)
00342 return AVERROR(EINVAL);
00343
00344 for (i = 0; i < desc->nb_components; i++)
00345 nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
00346 nb_planes++;
00347
00348 av_image_fill_linesizes(linesize, pix_fmt, width);
00349 for (i = 0; i < nb_planes; i++) {
00350 int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
00351 const uint8_t *src = src_data[i];
00352 h = (height + (1 << shift) - 1) >> shift;
00353
00354 for (j = 0; j < h; j++) {
00355 memcpy(dst, src, linesize[i]);
00356 dst += FFALIGN(linesize[i], align);
00357 src += src_linesize[i];
00358 }
00359 }
00360
00361 if (desc->flags & PIX_FMT_PAL) {
00362 uint32_t *d32 = (uint32_t *)(((size_t)dst + 3) & ~3);
00363 for (i = 0; i<256; i++)
00364 AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i));
00365 }
00366
00367 return size;
00368 }