libavcodec/ljpegenc.c

   1 /*
   2  * lossless JPEG encoder
   3  * Copyright (c) 2000, 2001 Fabrice Bellard
   4  * Copyright (c) 2003 Alex Beregszaszi
   5  * Copyright (c) 2003-2004 Michael Niedermayer
   6  *
   7  * Support for external huffman table, various fixes (AVID workaround),
   8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
   9  *                                  by Alex Beregszaszi
  10  *
  11  * This file is part of FFmpeg.
  12  *
  13  * FFmpeg is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2.1 of the License, or (at your option) any later version.
  17  *
  18  * FFmpeg is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with FFmpeg; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  26  */
  27
  28 /**
  29  * @file
  30  * lossless JPEG encoder.
  31  */
  32
  33 #include "libavutil/frame.h"
  34 #include "libavutil/mem.h"
  35 #include "libavutil/opt.h"
  36
  37 #include "avcodec.h"
  38 #include "codec_internal.h"
  39 #include "encode.h"
  40 #include "jpegtables.h"
  41 #include "mjpegenc_common.h"
  42 #include "mjpeg.h"
  43
  44 typedef struct LJpegEncContext {
  45     AVClass *class;
  46
  47     int vsample[4];
  48     int hsample[4];
  49
  50     uint16_t huff_code_dc_luminance[12];
  51     uint16_t huff_code_dc_chrominance[12];
  52     uint8_t  huff_size_dc_luminance[12];
  53     uint8_t  huff_size_dc_chrominance[12];
  54
  55     uint16_t (*scratch)[4];
  56     int pred;
  57 } LJpegEncContext;
  58
  59 static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
  60                             const AVFrame *frame)
  61 {
  62     LJpegEncContext *s    = avctx->priv_data;
  63     const int width       = frame->width;
  64     const int height      = frame->height;
  65     const int linesize    = frame->linesize[0];
  66     uint16_t (*buffer)[4] = s->scratch;
  67     int left[4], top[4], topleft[4];
  68     int x, y, i;
  69
  70     for (i = 0; i < 4; i++)
  71         buffer[0][i] = 1 << (9 - 1);
  72
  73     for (y = 0; y < height; y++) {
  74         const int modified_predictor = y ? s->pred : 1;
  75         const uint8_t *ptr = frame->data[0] + (linesize * y);
  76
  77         if (put_bytes_left(pb, 0) < width * 4 * 4) {
  78             av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
  79             return -1;
  80         }
  81
  82         for (i = 0; i < 4; i++)
  83             top[i]= left[i]= topleft[i]= buffer[0][i];
  84
  85         for (x = 0; x < width; x++) {
  86             if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
  87                 buffer[x][1] =  ptr[3 * x + 0] -     ptr[3 * x + 1] + 0x100;
  88                 buffer[x][2] =  ptr[3 * x + 2] -     ptr[3 * x + 1] + 0x100;
  89                 buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
  90             }else{
  91                 buffer[x][1] =  ptr[4 * x + 0] -     ptr[4 * x + 1] + 0x100;
  92                 buffer[x][2] =  ptr[4 * x + 2] -     ptr[4 * x + 1] + 0x100;
  93                 buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
  94                 if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
  95                     buffer[x][3] =  ptr[4 * x + 3];
  96             }
  97
  98             for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
  99                 int pred, diff;
 100
 101                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
 102
 103                 topleft[i] = top[i];
 104                 top[i]     = buffer[x+1][i];
 105
 106                 left[i]    = buffer[x][i];
 107
 108                 diff       = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
 109
 110                 if (i == 0 || i == 3)
 111                     ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
 112                 else
 113                     ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
 114             }
 115         }
 116     }
 117
 118     return 0;
 119 }
 120
 121 static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
 122                                        const AVFrame *frame, int predictor,
 123                                        int mb_x, int mb_y)
 124 {
 125     int i;
 126
 127     if (mb_x == 0 || mb_y == 0) {
 128         for (i = 0; i < 3; i++) {
 129             const uint8_t *ptr;
 130             int x, y, h, v, linesize;
 131             h = s->hsample[i];
 132             v = s->vsample[i];
 133             linesize = frame->linesize[i];
 134
 135             for (y = 0; y < v; y++) {
 136                 for (x = 0; x < h; x++) {
 137                     int pred;
 138
 139                     ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
 140                     if (y == 0 && mb_y == 0) {
 141                         if (x == 0 && mb_x == 0)
 142                             pred = 128;
 143                         else
 144                             pred = ptr[-1];
 145                     } else {
 146                         if (x == 0 && mb_x == 0) {
 147                             pred = ptr[-linesize];
 148                         } else {
 149                             PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
 150                                     ptr[-1], predictor);
 151                         }
 152                     }
 153
 154                     if (i == 0)
 155                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
 156                     else
 157                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
 158                 }
 159             }
 160         }
 161     } else {
 162         for (i = 0; i < 3; i++) {
 163             const uint8_t *ptr;
 164             int x, y, h, v, linesize;
 165             h = s->hsample[i];
 166             v = s->vsample[i];
 167             linesize = frame->linesize[i];
 168
 169             for (y = 0; y < v; y++) {
 170                 for (x = 0; x < h; x++) {
 171                     int pred;
 172
 173                     ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
 174                     PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
 175
 176                     if (i == 0)
 177                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
 178                     else
 179                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
 180                 }
 181             }
 182         }
 183     }
 184 }
 185
 186 static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
 187                             const AVFrame *frame)
 188 {
 189     LJpegEncContext *s  = avctx->priv_data;
 190     const int mb_width  = (avctx->width  + s->hsample[0] - 1) / s->hsample[0];
 191     const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
 192     int mb_x, mb_y;
 193
 194     for (mb_y = 0; mb_y < mb_height; mb_y++) {
 195         if (put_bytes_left(pb, 0) <
 196             mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
 197             av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
 198             return -1;
 199         }
 200
 201         for (mb_x = 0; mb_x < mb_width; mb_x++)
 202             ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
 203     }
 204
 205     return 0;
 206 }
 207
 208 static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 209                               const AVFrame *pict, int *got_packet)
 210 {
 211     LJpegEncContext *s = avctx->priv_data;
 212     PutBitContext pb;
 213     const int width  = avctx->width;
 214     const int height = avctx->height;
 215     const int mb_width  = (width  + s->hsample[0] - 1) / s->hsample[0];
 216     const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
 217     size_t max_pkt_size = FF_INPUT_BUFFER_MIN_SIZE;
 218     int ret, header_bits;
 219
 220     if(    avctx->pix_fmt == AV_PIX_FMT_BGR0
 221         || avctx->pix_fmt == AV_PIX_FMT_BGR24)
 222         max_pkt_size += width * height * 3 * 4;
 223     else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
 224         max_pkt_size += width * height * 4 * 4;
 225     else {
 226         max_pkt_size += mb_width * mb_height * 3 * 4
 227                         * s->hsample[0] * s->vsample[0];
 228     }
 229
 230     if ((ret = ff_mjpeg_add_icc_profile_size(avctx, pict, &max_pkt_size)) < 0)
 231         return ret;
 232     if ((ret = ff_alloc_packet(avctx, pkt, max_pkt_size)) < 0)
 233         return ret;
 234
 235     init_put_bits(&pb, pkt->data, pkt->size);
 236
 237     ff_mjpeg_encode_picture_header(avctx, &pb, pict, NULL, NULL,
 238                                    s->pred, NULL, NULL, 0);
 239
 240     header_bits = put_bits_count(&pb);
 241
 242     if(    avctx->pix_fmt == AV_PIX_FMT_BGR0
 243         || avctx->pix_fmt == AV_PIX_FMT_BGRA
 244         || avctx->pix_fmt == AV_PIX_FMT_BGR24)
 245         ret = ljpeg_encode_bgr(avctx, &pb, pict);
 246     else
 247         ret = ljpeg_encode_yuv(avctx, &pb, pict);
 248     if (ret < 0)
 249         return ret;
 250
 251     ff_mjpeg_escape_FF(&pb, header_bits >> 3);
 252     ff_mjpeg_encode_picture_trailer(&pb, header_bits);
 253
 254     flush_put_bits(&pb);
 255     pkt->size   = put_bits_ptr(&pb) - pb.buf;
 256     *got_packet = 1;
 257
 258     return 0;
 259 }
 260
 261 static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
 262 {
 263     LJpegEncContext *s = avctx->priv_data;
 264
 265     av_freep(&s->scratch);
 266
 267     return 0;
 268 }
 269
 270 static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
 271 {
 272     int ret = ff_mjpeg_encode_check_pix_fmt(avctx);
 273     LJpegEncContext *s = avctx->priv_data;
 274
 275     if (ret < 0)
 276         return ret;
 277
 278     s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
 279     if (!s->scratch)
 280         return AVERROR(ENOMEM);
 281
 282     ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
 283
 284     ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
 285                                  s->huff_code_dc_luminance,
 286                                  ff_mjpeg_bits_dc_luminance,
 287                                  ff_mjpeg_val_dc);
 288     ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
 289                                  s->huff_code_dc_chrominance,
 290                                  ff_mjpeg_bits_dc_chrominance,
 291                                  ff_mjpeg_val_dc);
 292
 293     return 0;
 294 }
 295
 296 #define OFFSET(x) offsetof(LJpegEncContext, x)
 297 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 298 static const AVOption options[] = {
 299 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, .unit = "pred" },
 300     { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
 301     { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
 302     { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
 303
 304     { NULL},
 305 };
 306
 307 static const AVClass ljpeg_class = {
 308     .class_name = "ljpeg",
 309     .item_name  = av_default_item_name,
 310     .option     = options,
 311     .version    = LIBAVUTIL_VERSION_INT,
 312 };
 313
 314 const FFCodec ff_ljpeg_encoder = {
 315     .p.name         = "ljpeg",
 316     CODEC_LONG_NAME("Lossless JPEG"),
 317     .p.type         = AVMEDIA_TYPE_VIDEO,
 318     .p.id           = AV_CODEC_ID_LJPEG,
 319     .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
 320                       AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
 321     .priv_data_size = sizeof(LJpegEncContext),
 322     .p.priv_class   = &ljpeg_class,
 323     .init           = ljpeg_encode_init,
 324     FF_CODEC_ENCODE_CB(ljpeg_encode_frame),
 325     .close          = ljpeg_encode_close,
 326     .p.pix_fmts     = (const enum AVPixelFormat[]){
 327         AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
 328         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
 329         AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
 330         AV_PIX_FMT_NONE},
 331     .color_ranges   = AVCOL_RANGE_MPEG | AVCOL_RANGE_JPEG,
 332 };