| 1 | /* |
| 2 | * Raw Video Decoder |
| 3 | * Copyright (c) 2001 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 | /** |
| 23 | * @file |
| 24 | * Raw Video Decoder |
| 25 | */ |
| 26 | |
| 27 | #include "avcodec.h" |
| 28 | #include "bswapdsp.h" |
| 29 | #include "get_bits.h" |
| 30 | #include "internal.h" |
| 31 | #include "raw.h" |
| 32 | #include "libavutil/avassert.h" |
| 33 | #include "libavutil/buffer.h" |
| 34 | #include "libavutil/common.h" |
| 35 | #include "libavutil/intreadwrite.h" |
| 36 | #include "libavutil/imgutils.h" |
| 37 | #include "libavutil/opt.h" |
| 38 | |
| 39 | typedef struct RawVideoContext { |
| 40 | AVClass *av_class; |
| 41 | AVBufferRef *palette; |
| 42 | int frame_size; /* size of the frame in bytes */ |
| 43 | int flip; |
| 44 | int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov |
| 45 | int is_yuv2; |
| 46 | int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16 |
| 47 | int tff; |
| 48 | |
| 49 | BswapDSPContext bbdsp; |
| 50 | void *bitstream_buf; |
| 51 | unsigned int bitstream_buf_size; |
| 52 | } RawVideoContext; |
| 53 | |
| 54 | static const AVOption options[]={ |
| 55 | {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM}, |
| 56 | {NULL} |
| 57 | }; |
| 58 | |
| 59 | static const AVClass rawdec_class = { |
| 60 | .class_name = "rawdec", |
| 61 | .option = options, |
| 62 | .version = LIBAVUTIL_VERSION_INT, |
| 63 | }; |
| 64 | |
| 65 | static av_cold int raw_init_decoder(AVCodecContext *avctx) |
| 66 | { |
| 67 | RawVideoContext *context = avctx->priv_data; |
| 68 | const AVPixFmtDescriptor *desc; |
| 69 | |
| 70 | ff_bswapdsp_init(&context->bbdsp); |
| 71 | |
| 72 | if ( avctx->codec_tag == MKTAG('r','a','w',' ') |
| 73 | || avctx->codec_tag == MKTAG('N','O','1','6')) |
| 74 | avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov, |
| 75 | avctx->bits_per_coded_sample); |
| 76 | else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W')) |
| 77 | avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, |
| 78 | avctx->bits_per_coded_sample); |
| 79 | else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) |
| 80 | avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); |
| 81 | else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample) |
| 82 | avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, |
| 83 | avctx->bits_per_coded_sample); |
| 84 | |
| 85 | desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
| 86 | if (!desc) { |
| 87 | av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n"); |
| 88 | return AVERROR(EINVAL); |
| 89 | } |
| 90 | |
| 91 | if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
| 92 | context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
| 93 | if (!context->palette) |
| 94 | return AVERROR(ENOMEM); |
| 95 | if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
| 96 | avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt); |
| 97 | else |
| 98 | memset(context->palette->data, 0, AVPALETTE_SIZE); |
| 99 | } |
| 100 | |
| 101 | if ((avctx->extradata_size >= 9 && |
| 102 | !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || |
| 103 | avctx->codec_tag == MKTAG('c','y','u','v') || |
| 104 | avctx->codec_tag == MKTAG(3, 0, 0, 0) || |
| 105 | avctx->codec_tag == MKTAG('W','R','A','W')) |
| 106 | context->flip = 1; |
| 107 | |
| 108 | if (avctx->codec_tag == AV_RL32("yuv2") && |
| 109 | avctx->pix_fmt == AV_PIX_FMT_YUYV422) |
| 110 | context->is_yuv2 = 1; |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static void flip(AVCodecContext *avctx, AVPicture *picture) |
| 116 | { |
| 117 | picture->data[0] += picture->linesize[0] * (avctx->height - 1); |
| 118 | picture->linesize[0] *= -1; |
| 119 | } |
| 120 | |
| 121 | /* |
| 122 | * Scale sample to 16-bit resolution |
| 123 | */ |
| 124 | #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16))) |
| 125 | |
| 126 | /** |
| 127 | * Scale buffer to 16 bits per coded sample resolution |
| 128 | */ |
| 129 | #define MKSCALE16(name, r16, w16) \ |
| 130 | static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \ |
| 131 | { \ |
| 132 | int i; \ |
| 133 | if (!packed) { \ |
| 134 | for (i = 0; i + 1 < buf_size; i += 2) \ |
| 135 | w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \ |
| 136 | } else { \ |
| 137 | GetBitContext gb; \ |
| 138 | init_get_bits(&gb, buf, buf_size * 8); \ |
| 139 | for (i = 0; i < avctx->width * avctx->height; i++) { \ |
| 140 | int sample = get_bits(&gb, avctx->bits_per_coded_sample); \ |
| 141 | w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \ |
| 142 | } \ |
| 143 | } \ |
| 144 | } |
| 145 | |
| 146 | MKSCALE16(scale16be, AV_RB16, AV_WB16) |
| 147 | MKSCALE16(scale16le, AV_RL16, AV_WL16) |
| 148 | |
| 149 | static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, |
| 150 | AVPacket *avpkt) |
| 151 | { |
| 152 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
| 153 | RawVideoContext *context = avctx->priv_data; |
| 154 | const uint8_t *buf = avpkt->data; |
| 155 | int buf_size = avpkt->size; |
| 156 | int linesize_align = 4; |
| 157 | int res, len; |
| 158 | int need_copy; |
| 159 | |
| 160 | AVFrame *frame = data; |
| 161 | AVPicture *picture = data; |
| 162 | |
| 163 | if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) && |
| 164 | avctx->pix_fmt == AV_PIX_FMT_PAL8 && |
| 165 | (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) { |
| 166 | context->is_2_4_bpp = 1; |
| 167 | context->frame_size = avpicture_get_size(avctx->pix_fmt, |
| 168 | FFALIGN(avctx->width, 16), |
| 169 | avctx->height); |
| 170 | } else { |
| 171 | context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16; |
| 172 | context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width, |
| 173 | avctx->height); |
| 174 | } |
| 175 | need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp; |
| 176 | |
| 177 | frame->pict_type = AV_PICTURE_TYPE_I; |
| 178 | frame->key_frame = 1; |
| 179 | |
| 180 | res = ff_decode_frame_props(avctx, frame); |
| 181 | if (res < 0) |
| 182 | return res; |
| 183 | |
| 184 | av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos); |
| 185 | av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration); |
| 186 | |
| 187 | if (context->tff >= 0) { |
| 188 | frame->interlaced_frame = 1; |
| 189 | frame->top_field_first = context->tff; |
| 190 | } |
| 191 | |
| 192 | if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) |
| 193 | return res; |
| 194 | |
| 195 | if (need_copy) |
| 196 | frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size)); |
| 197 | else |
| 198 | frame->buf[0] = av_buffer_ref(avpkt->buf); |
| 199 | if (!frame->buf[0]) |
| 200 | return AVERROR(ENOMEM); |
| 201 | |
| 202 | //2bpp and 4bpp raw in avi and mov (yes this is ugly ...) |
| 203 | if (context->is_2_4_bpp) { |
| 204 | int i; |
| 205 | uint8_t *dst = frame->buf[0]->data; |
| 206 | buf_size = context->frame_size - AVPALETTE_SIZE; |
| 207 | if (avctx->bits_per_coded_sample == 4) { |
| 208 | for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) { |
| 209 | dst[2 * i + 0] = buf[i] >> 4; |
| 210 | dst[2 * i + 1] = buf[i] & 15; |
| 211 | } |
| 212 | linesize_align = 8; |
| 213 | } else { |
| 214 | av_assert0(avctx->bits_per_coded_sample == 2); |
| 215 | for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) { |
| 216 | dst[4 * i + 0] = buf[i] >> 6; |
| 217 | dst[4 * i + 1] = buf[i] >> 4 & 3; |
| 218 | dst[4 * i + 2] = buf[i] >> 2 & 3; |
| 219 | dst[4 * i + 3] = buf[i] & 3; |
| 220 | } |
| 221 | linesize_align = 16; |
| 222 | } |
| 223 | buf = dst; |
| 224 | } else if (context->is_lt_16bpp) { |
| 225 | uint8_t *dst = frame->buf[0]->data; |
| 226 | int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0); |
| 227 | int swap = avctx->codec_tag >> 24; |
| 228 | |
| 229 | if (packed && swap) { |
| 230 | av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size); |
| 231 | if (!context->bitstream_buf) |
| 232 | return AVERROR(ENOMEM); |
| 233 | if (swap == 16) |
| 234 | context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2); |
| 235 | else if (swap == 32) |
| 236 | context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4); |
| 237 | else |
| 238 | return AVERROR_INVALIDDATA; |
| 239 | buf = context->bitstream_buf; |
| 240 | } |
| 241 | |
| 242 | if (desc->flags & AV_PIX_FMT_FLAG_BE) |
| 243 | scale16be(avctx, dst, buf, buf_size, packed); |
| 244 | else |
| 245 | scale16le(avctx, dst, buf, buf_size, packed); |
| 246 | |
| 247 | buf = dst; |
| 248 | } else if (need_copy) { |
| 249 | memcpy(frame->buf[0]->data, buf, buf_size); |
| 250 | buf = frame->buf[0]->data; |
| 251 | } |
| 252 | |
| 253 | if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || |
| 254 | avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) |
| 255 | buf += buf_size - context->frame_size; |
| 256 | |
| 257 | len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0); |
| 258 | if (buf_size < len && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) { |
| 259 | av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len); |
| 260 | av_buffer_unref(&frame->buf[0]); |
| 261 | return AVERROR(EINVAL); |
| 262 | } |
| 263 | |
| 264 | if ((res = avpicture_fill(picture, buf, avctx->pix_fmt, |
| 265 | avctx->width, avctx->height)) < 0) { |
| 266 | av_buffer_unref(&frame->buf[0]); |
| 267 | return res; |
| 268 | } |
| 269 | |
| 270 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| 271 | const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, |
| 272 | NULL); |
| 273 | |
| 274 | if (pal) { |
| 275 | av_buffer_unref(&context->palette); |
| 276 | context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
| 277 | if (!context->palette) { |
| 278 | av_buffer_unref(&frame->buf[0]); |
| 279 | return AVERROR(ENOMEM); |
| 280 | } |
| 281 | memcpy(context->palette->data, pal, AVPALETTE_SIZE); |
| 282 | frame->palette_has_changed = 1; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 || |
| 287 | avctx->pix_fmt==AV_PIX_FMT_GRAY8 || |
| 288 | avctx->pix_fmt==AV_PIX_FMT_RGB555LE || |
| 289 | avctx->pix_fmt==AV_PIX_FMT_RGB555BE || |
| 290 | avctx->pix_fmt==AV_PIX_FMT_RGB565LE || |
| 291 | avctx->pix_fmt==AV_PIX_FMT_MONOWHITE || |
| 292 | avctx->pix_fmt==AV_PIX_FMT_PAL8) && |
| 293 | FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size) |
| 294 | frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); |
| 295 | |
| 296 | if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') && |
| 297 | FFALIGN(frame->linesize[0], linesize_align) * avctx->height + |
| 298 | FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) { |
| 299 | int la0 = FFALIGN(frame->linesize[0], linesize_align); |
| 300 | frame->data[1] += (la0 - frame->linesize[0]) * avctx->height; |
| 301 | frame->linesize[0] = la0; |
| 302 | frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align); |
| 303 | } |
| 304 | |
| 305 | if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || |
| 306 | (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
| 307 | frame->buf[1] = av_buffer_ref(context->palette); |
| 308 | if (!frame->buf[1]) { |
| 309 | av_buffer_unref(&frame->buf[0]); |
| 310 | return AVERROR(ENOMEM); |
| 311 | } |
| 312 | frame->data[1] = frame->buf[1]->data; |
| 313 | } |
| 314 | |
| 315 | if (avctx->pix_fmt == AV_PIX_FMT_BGR24 && |
| 316 | ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size) |
| 317 | frame->linesize[0] = (frame->linesize[0] + 3) & ~3; |
| 318 | |
| 319 | if (context->flip) |
| 320 | flip(avctx, picture); |
| 321 | |
| 322 | if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') || |
| 323 | avctx->codec_tag == MKTAG('Y', 'V', '1', '6') || |
| 324 | avctx->codec_tag == MKTAG('Y', 'V', '2', '4') || |
| 325 | avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) |
| 326 | FFSWAP(uint8_t *, picture->data[1], picture->data[2]); |
| 327 | |
| 328 | if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) { |
| 329 | picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height; |
| 330 | picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4; |
| 331 | } |
| 332 | |
| 333 | if (avctx->codec_tag == AV_RL32("yuv2") && |
| 334 | avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
| 335 | int x, y; |
| 336 | uint8_t *line = picture->data[0]; |
| 337 | for (y = 0; y < avctx->height; y++) { |
| 338 | for (x = 0; x < avctx->width; x++) |
| 339 | line[2 * x + 1] ^= 0x80; |
| 340 | line += picture->linesize[0]; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */ |
| 345 | frame->interlaced_frame = 1; |
| 346 | if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB) |
| 347 | frame->top_field_first = 1; |
| 348 | } |
| 349 | |
| 350 | *got_frame = 1; |
| 351 | return buf_size; |
| 352 | } |
| 353 | |
| 354 | static av_cold int raw_close_decoder(AVCodecContext *avctx) |
| 355 | { |
| 356 | RawVideoContext *context = avctx->priv_data; |
| 357 | |
| 358 | av_buffer_unref(&context->palette); |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | AVCodec ff_rawvideo_decoder = { |
| 363 | .name = "rawvideo", |
| 364 | .long_name = NULL_IF_CONFIG_SMALL("raw video"), |
| 365 | .type = AVMEDIA_TYPE_VIDEO, |
| 366 | .id = AV_CODEC_ID_RAWVIDEO, |
| 367 | .priv_data_size = sizeof(RawVideoContext), |
| 368 | .init = raw_init_decoder, |
| 369 | .close = raw_close_decoder, |
| 370 | .decode = raw_decode, |
| 371 | .priv_class = &rawdec_class, |
| 372 | .capabilities = CODEC_CAP_PARAM_CHANGE, |
| 373 | }; |