blob: 958c5e43b07c05a23f7146937070797dafe9a8fa
| 1 | /* |
| 2 | * PNM image format |
| 3 | * Copyright (c) 2002, 2003 Fabrice Bellard |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avcodec.h" |
| 23 | #include "internal.h" |
| 24 | #include "put_bits.h" |
| 25 | #include "pnm.h" |
| 26 | |
| 27 | static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval) |
| 28 | { |
| 29 | if (maxval <= 255) { |
| 30 | memcpy(dst, src, n); |
| 31 | } else { |
| 32 | int i; |
| 33 | for (i=0; i<n/2; i++) { |
| 34 | ((uint16_t *)dst)[i] = AV_RB16(src+2*i); |
| 35 | } |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | static int pnm_decode_frame(AVCodecContext *avctx, void *data, |
| 40 | int *got_frame, AVPacket *avpkt) |
| 41 | { |
| 42 | const uint8_t *buf = avpkt->data; |
| 43 | int buf_size = avpkt->size; |
| 44 | PNMContext * const s = avctx->priv_data; |
| 45 | AVFrame * const p = data; |
| 46 | int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0; |
| 47 | unsigned char *ptr; |
| 48 | int components, sample_len, ret; |
| 49 | |
| 50 | s->bytestream_start = |
| 51 | s->bytestream = (uint8_t *)buf; |
| 52 | s->bytestream_end = (uint8_t *)buf + buf_size; |
| 53 | |
| 54 | if ((ret = ff_pnm_decode_header(avctx, s)) < 0) |
| 55 | return ret; |
| 56 | |
| 57 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
| 58 | return ret; |
| 59 | p->pict_type = AV_PICTURE_TYPE_I; |
| 60 | p->key_frame = 1; |
| 61 | avctx->bits_per_raw_sample = av_log2(s->maxval) + 1; |
| 62 | |
| 63 | switch (avctx->pix_fmt) { |
| 64 | default: |
| 65 | return AVERROR(EINVAL); |
| 66 | case AV_PIX_FMT_RGBA64: |
| 67 | n = avctx->width * 8; |
| 68 | components=4; |
| 69 | sample_len=16; |
| 70 | if (s->maxval < 65535) |
| 71 | upgrade = 2; |
| 72 | goto do_read; |
| 73 | case AV_PIX_FMT_RGB48: |
| 74 | n = avctx->width * 6; |
| 75 | components=3; |
| 76 | sample_len=16; |
| 77 | if (s->maxval < 65535) |
| 78 | upgrade = 2; |
| 79 | goto do_read; |
| 80 | case AV_PIX_FMT_RGBA: |
| 81 | n = avctx->width * 4; |
| 82 | components=4; |
| 83 | sample_len=8; |
| 84 | goto do_read; |
| 85 | case AV_PIX_FMT_RGB24: |
| 86 | n = avctx->width * 3; |
| 87 | components=3; |
| 88 | sample_len=8; |
| 89 | if (s->maxval < 255) |
| 90 | upgrade = 1; |
| 91 | goto do_read; |
| 92 | case AV_PIX_FMT_GRAY8: |
| 93 | n = avctx->width; |
| 94 | components=1; |
| 95 | sample_len=8; |
| 96 | if (s->maxval < 255) |
| 97 | upgrade = 1; |
| 98 | goto do_read; |
| 99 | case AV_PIX_FMT_GRAY8A: |
| 100 | n = avctx->width * 2; |
| 101 | components=2; |
| 102 | sample_len=8; |
| 103 | goto do_read; |
| 104 | case AV_PIX_FMT_GRAY16: |
| 105 | n = avctx->width * 2; |
| 106 | components=1; |
| 107 | sample_len=16; |
| 108 | if (s->maxval < 65535) |
| 109 | upgrade = 2; |
| 110 | goto do_read; |
| 111 | case AV_PIX_FMT_YA16: |
| 112 | n = avctx->width * 4; |
| 113 | components=2; |
| 114 | sample_len=16; |
| 115 | if (s->maxval < 65535) |
| 116 | upgrade = 2; |
| 117 | goto do_read; |
| 118 | case AV_PIX_FMT_MONOWHITE: |
| 119 | case AV_PIX_FMT_MONOBLACK: |
| 120 | n = (avctx->width + 7) >> 3; |
| 121 | components=1; |
| 122 | sample_len=1; |
| 123 | is_mono = 1; |
| 124 | do_read: |
| 125 | ptr = p->data[0]; |
| 126 | linesize = p->linesize[0]; |
| 127 | if (n * avctx->height > s->bytestream_end - s->bytestream) |
| 128 | return AVERROR_INVALIDDATA; |
| 129 | if(s->type < 4 || (is_mono && s->type==7)){ |
| 130 | for (i=0; i<avctx->height; i++) { |
| 131 | PutBitContext pb; |
| 132 | init_put_bits(&pb, ptr, linesize); |
| 133 | for(j=0; j<avctx->width * components; j++){ |
| 134 | unsigned int c=0; |
| 135 | int v=0; |
| 136 | if(s->type < 4) |
| 137 | while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' )) |
| 138 | s->bytestream++; |
| 139 | if(s->bytestream >= s->bytestream_end) |
| 140 | return AVERROR_INVALIDDATA; |
| 141 | if (is_mono) { |
| 142 | /* read a single digit */ |
| 143 | v = (*s->bytestream++)&1; |
| 144 | } else { |
| 145 | /* read a sequence of digits */ |
| 146 | for (k = 0; k < 5 && c <= 9; k += 1) { |
| 147 | v = 10*v + c; |
| 148 | c = (*s->bytestream++) - '0'; |
| 149 | } |
| 150 | if (v > s->maxval) { |
| 151 | av_log(avctx, AV_LOG_ERROR, "value %d larger than maxval %d\n", v, s->maxval); |
| 152 | return AVERROR_INVALIDDATA; |
| 153 | } |
| 154 | } |
| 155 | if (sample_len == 16) { |
| 156 | ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval; |
| 157 | } else |
| 158 | put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval); |
| 159 | } |
| 160 | if (sample_len != 16) |
| 161 | flush_put_bits(&pb); |
| 162 | ptr+= linesize; |
| 163 | } |
| 164 | }else{ |
| 165 | for (i = 0; i < avctx->height; i++) { |
| 166 | if (!upgrade) |
| 167 | samplecpy(ptr, s->bytestream, n, s->maxval); |
| 168 | else if (upgrade == 1) { |
| 169 | unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval; |
| 170 | for (j = 0; j < n; j++) |
| 171 | ptr[j] = (s->bytestream[j] * f + 64) >> 7; |
| 172 | } else if (upgrade == 2) { |
| 173 | unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval; |
| 174 | for (j = 0; j < n / 2; j++) { |
| 175 | v = av_be2ne16(((uint16_t *)s->bytestream)[j]); |
| 176 | ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15; |
| 177 | } |
| 178 | } |
| 179 | s->bytestream += n; |
| 180 | ptr += linesize; |
| 181 | } |
| 182 | } |
| 183 | break; |
| 184 | case AV_PIX_FMT_YUV420P: |
| 185 | case AV_PIX_FMT_YUV420P9: |
| 186 | case AV_PIX_FMT_YUV420P10: |
| 187 | { |
| 188 | unsigned char *ptr1, *ptr2; |
| 189 | |
| 190 | n = avctx->width; |
| 191 | ptr = p->data[0]; |
| 192 | linesize = p->linesize[0]; |
| 193 | if (s->maxval >= 256) |
| 194 | n *= 2; |
| 195 | if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream) |
| 196 | return AVERROR_INVALIDDATA; |
| 197 | for (i = 0; i < avctx->height; i++) { |
| 198 | samplecpy(ptr, s->bytestream, n, s->maxval); |
| 199 | s->bytestream += n; |
| 200 | ptr += linesize; |
| 201 | } |
| 202 | ptr1 = p->data[1]; |
| 203 | ptr2 = p->data[2]; |
| 204 | n >>= 1; |
| 205 | h = avctx->height >> 1; |
| 206 | for (i = 0; i < h; i++) { |
| 207 | samplecpy(ptr1, s->bytestream, n, s->maxval); |
| 208 | s->bytestream += n; |
| 209 | samplecpy(ptr2, s->bytestream, n, s->maxval); |
| 210 | s->bytestream += n; |
| 211 | ptr1 += p->linesize[1]; |
| 212 | ptr2 += p->linesize[2]; |
| 213 | } |
| 214 | } |
| 215 | break; |
| 216 | case AV_PIX_FMT_YUV420P16: |
| 217 | { |
| 218 | uint16_t *ptr1, *ptr2; |
| 219 | const int f = (65535 * 32768 + s->maxval / 2) / s->maxval; |
| 220 | unsigned int j, v; |
| 221 | |
| 222 | n = avctx->width * 2; |
| 223 | ptr = p->data[0]; |
| 224 | linesize = p->linesize[0]; |
| 225 | if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream) |
| 226 | return AVERROR_INVALIDDATA; |
| 227 | for (i = 0; i < avctx->height; i++) { |
| 228 | for (j = 0; j < n / 2; j++) { |
| 229 | v = av_be2ne16(((uint16_t *)s->bytestream)[j]); |
| 230 | ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15; |
| 231 | } |
| 232 | s->bytestream += n; |
| 233 | ptr += linesize; |
| 234 | } |
| 235 | ptr1 = (uint16_t*)p->data[1]; |
| 236 | ptr2 = (uint16_t*)p->data[2]; |
| 237 | n >>= 1; |
| 238 | h = avctx->height >> 1; |
| 239 | for (i = 0; i < h; i++) { |
| 240 | for (j = 0; j < n / 2; j++) { |
| 241 | v = av_be2ne16(((uint16_t *)s->bytestream)[j]); |
| 242 | ptr1[j] = (v * f + 16384) >> 15; |
| 243 | } |
| 244 | s->bytestream += n; |
| 245 | |
| 246 | for (j = 0; j < n / 2; j++) { |
| 247 | v = av_be2ne16(((uint16_t *)s->bytestream)[j]); |
| 248 | ptr2[j] = (v * f + 16384) >> 15; |
| 249 | } |
| 250 | s->bytestream += n; |
| 251 | |
| 252 | ptr1 += p->linesize[1] / 2; |
| 253 | ptr2 += p->linesize[2] / 2; |
| 254 | } |
| 255 | } |
| 256 | break; |
| 257 | } |
| 258 | *got_frame = 1; |
| 259 | |
| 260 | return s->bytestream - s->bytestream_start; |
| 261 | } |
| 262 | |
| 263 | |
| 264 | #if CONFIG_PGM_DECODER |
| 265 | AVCodec ff_pgm_decoder = { |
| 266 | .name = "pgm", |
| 267 | .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
| 268 | .type = AVMEDIA_TYPE_VIDEO, |
| 269 | .id = AV_CODEC_ID_PGM, |
| 270 | .priv_data_size = sizeof(PNMContext), |
| 271 | .decode = pnm_decode_frame, |
| 272 | .capabilities = AV_CODEC_CAP_DR1, |
| 273 | }; |
| 274 | #endif |
| 275 | |
| 276 | #if CONFIG_PGMYUV_DECODER |
| 277 | AVCodec ff_pgmyuv_decoder = { |
| 278 | .name = "pgmyuv", |
| 279 | .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
| 280 | .type = AVMEDIA_TYPE_VIDEO, |
| 281 | .id = AV_CODEC_ID_PGMYUV, |
| 282 | .priv_data_size = sizeof(PNMContext), |
| 283 | .decode = pnm_decode_frame, |
| 284 | .capabilities = AV_CODEC_CAP_DR1, |
| 285 | }; |
| 286 | #endif |
| 287 | |
| 288 | #if CONFIG_PPM_DECODER |
| 289 | AVCodec ff_ppm_decoder = { |
| 290 | .name = "ppm", |
| 291 | .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
| 292 | .type = AVMEDIA_TYPE_VIDEO, |
| 293 | .id = AV_CODEC_ID_PPM, |
| 294 | .priv_data_size = sizeof(PNMContext), |
| 295 | .decode = pnm_decode_frame, |
| 296 | .capabilities = AV_CODEC_CAP_DR1, |
| 297 | }; |
| 298 | #endif |
| 299 | |
| 300 | #if CONFIG_PBM_DECODER |
| 301 | AVCodec ff_pbm_decoder = { |
| 302 | .name = "pbm", |
| 303 | .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
| 304 | .type = AVMEDIA_TYPE_VIDEO, |
| 305 | .id = AV_CODEC_ID_PBM, |
| 306 | .priv_data_size = sizeof(PNMContext), |
| 307 | .decode = pnm_decode_frame, |
| 308 | .capabilities = AV_CODEC_CAP_DR1, |
| 309 | }; |
| 310 | #endif |
| 311 | |
| 312 | #if CONFIG_PAM_DECODER |
| 313 | AVCodec ff_pam_decoder = { |
| 314 | .name = "pam", |
| 315 | .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"), |
| 316 | .type = AVMEDIA_TYPE_VIDEO, |
| 317 | .id = AV_CODEC_ID_PAM, |
| 318 | .priv_data_size = sizeof(PNMContext), |
| 319 | .decode = pnm_decode_frame, |
| 320 | .capabilities = AV_CODEC_CAP_DR1, |
| 321 | }; |
| 322 | #endif |
| 323 |