LCOV - code coverage report
Current view: top level - libavcodec - ljpegenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 93 147 63.3 %
Date: 2017-12-12 03:56:30 Functions: 5 6 83.3 %

          Line data    Source code
       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/pixdesc.h"
      36             : 
      37             : #include "avcodec.h"
      38             : #include "idctdsp.h"
      39             : #include "internal.h"
      40             : #include "jpegtables.h"
      41             : #include "mjpegenc_common.h"
      42             : #include "mjpeg.h"
      43             : 
      44             : typedef struct LJpegEncContext {
      45             :     AVClass *class;
      46             :     IDCTDSPContext idsp;
      47             :     ScanTable scantable;
      48             :     uint16_t matrix[64];
      49             : 
      50             :     int vsample[4];
      51             :     int hsample[4];
      52             : 
      53             :     uint16_t huff_code_dc_luminance[12];
      54             :     uint16_t huff_code_dc_chrominance[12];
      55             :     uint8_t  huff_size_dc_luminance[12];
      56             :     uint8_t  huff_size_dc_chrominance[12];
      57             : 
      58             :     uint16_t (*scratch)[4];
      59             :     int pred;
      60             : } LJpegEncContext;
      61             : 
      62           0 : static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
      63             :                             const AVFrame *frame)
      64             : {
      65           0 :     LJpegEncContext *s    = avctx->priv_data;
      66           0 :     const int width       = frame->width;
      67           0 :     const int height      = frame->height;
      68           0 :     const int linesize    = frame->linesize[0];
      69           0 :     uint16_t (*buffer)[4] = s->scratch;
      70             :     int left[4], top[4], topleft[4];
      71             :     int x, y, i;
      72             : 
      73             : #if FF_API_PRIVATE_OPT
      74             : FF_DISABLE_DEPRECATION_WARNINGS
      75           0 :     if (avctx->prediction_method)
      76           0 :         s->pred = avctx->prediction_method + 1;
      77             : FF_ENABLE_DEPRECATION_WARNINGS
      78             : #endif
      79             : 
      80           0 :     for (i = 0; i < 4; i++)
      81           0 :         buffer[0][i] = 1 << (9 - 1);
      82             : 
      83           0 :     for (y = 0; y < height; y++) {
      84           0 :         const int modified_predictor = y ? s->pred : 1;
      85           0 :         uint8_t *ptr = frame->data[0] + (linesize * y);
      86             : 
      87           0 :         if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 4 * 4) {
      88           0 :             av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
      89           0 :             return -1;
      90             :         }
      91             : 
      92           0 :         for (i = 0; i < 4; i++)
      93           0 :             top[i]= left[i]= topleft[i]= buffer[0][i];
      94             : 
      95           0 :         for (x = 0; x < width; x++) {
      96           0 :             if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
      97           0 :                 buffer[x][1] =  ptr[3 * x + 0] -     ptr[3 * x + 1] + 0x100;
      98           0 :                 buffer[x][2] =  ptr[3 * x + 2] -     ptr[3 * x + 1] + 0x100;
      99           0 :                 buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
     100             :             }else{
     101           0 :                 buffer[x][1] =  ptr[4 * x + 0] -     ptr[4 * x + 1] + 0x100;
     102           0 :                 buffer[x][2] =  ptr[4 * x + 2] -     ptr[4 * x + 1] + 0x100;
     103           0 :                 buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
     104           0 :                 if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
     105           0 :                     buffer[x][3] =  ptr[4 * x + 3];
     106             :             }
     107             : 
     108           0 :             for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
     109             :                 int pred, diff;
     110             : 
     111           0 :                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
     112             : 
     113           0 :                 topleft[i] = top[i];
     114           0 :                 top[i]     = buffer[x+1][i];
     115             : 
     116           0 :                 left[i]    = buffer[x][i];
     117             : 
     118           0 :                 diff       = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
     119             : 
     120           0 :                 if (i == 0 || i == 3)
     121           0 :                     ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
     122             :                 else
     123           0 :                     ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
     124             :             }
     125             :         }
     126             :     }
     127             : 
     128           0 :     return 0;
     129             : }
     130             : 
     131     3816050 : static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
     132             :                                        const AVFrame *frame, int predictor,
     133             :                                        int mb_x, int mb_y)
     134             : {
     135             :     int i;
     136             : 
     137     3865550 :     if (mb_x == 0 || mb_y == 0) {
     138      198000 :         for (i = 0; i < 3; i++) {
     139             :             uint8_t *ptr;
     140             :             int x, y, h, v, linesize;
     141      148500 :             h = s->hsample[i];
     142      148500 :             v = s->vsample[i];
     143      148500 :             linesize = frame->linesize[i];
     144             : 
     145      346500 :             for (y = 0; y < v; y++) {
     146      495000 :                 for (x = 0; x < h; x++) {
     147             :                     int pred;
     148             : 
     149      297000 :                     ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
     150      297000 :                     if (y == 0 && mb_y == 0) {
     151      218000 :                         if (x == 0 && mb_x == 0)
     152         600 :                             pred = 128;
     153             :                         else
     154      108400 :                             pred = ptr[-1];
     155             :                     } else {
     156      188000 :                         if (x == 0 && mb_x == 0) {
     157       89200 :                             pred = ptr[-linesize];
     158             :                         } else {
     159       98800 :                             PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
     160             :                                     ptr[-1], predictor);
     161             :                         }
     162             :                     }
     163             : 
     164      297000 :                     if (i == 0)
     165      198000 :                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
     166             :                     else
     167       99000 :                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
     168             :                 }
     169             :             }
     170             :         }
     171             :     } else {
     172    15066200 :         for (i = 0; i < 3; i++) {
     173             :             uint8_t *ptr;
     174             :             int x, y, h, v, linesize;
     175    11299650 :             h = s->hsample[i];
     176    11299650 :             v = s->vsample[i];
     177    11299650 :             linesize = frame->linesize[i];
     178             : 
     179    26365850 :             for (y = 0; y < v; y++) {
     180    37665500 :                 for (x = 0; x < h; x++) {
     181             :                     int pred;
     182             : 
     183    22599300 :                     ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
     184    22599300 :                     PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
     185             : 
     186    22599300 :                     if (i == 0)
     187    15066200 :                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
     188             :                     else
     189     7533100 :                         ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
     190             :                 }
     191             :             }
     192             :         }
     193             :     }
     194     3816050 : }
     195             : 
     196         200 : static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
     197             :                             const AVFrame *frame)
     198             : {
     199         200 :     LJpegEncContext *s  = avctx->priv_data;
     200         200 :     const int mb_width  = (avctx->width  + s->hsample[0] - 1) / s->hsample[0];
     201         200 :     const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
     202             :     int mb_x, mb_y;
     203             : 
     204             : #if FF_API_PRIVATE_OPT
     205             : FF_DISABLE_DEPRECATION_WARNINGS
     206         200 :     if (avctx->prediction_method)
     207           0 :         s->pred = avctx->prediction_method + 1;
     208             : FF_ENABLE_DEPRECATION_WARNINGS
     209             : #endif
     210             : 
     211       22650 :     for (mb_y = 0; mb_y < mb_height; mb_y++) {
     212       44900 :         if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
     213       22450 :             mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
     214           0 :             av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
     215           0 :             return -1;
     216             :         }
     217             : 
     218     3838500 :         for (mb_x = 0; mb_x < mb_width; mb_x++)
     219     3816050 :             ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
     220             :     }
     221             : 
     222         200 :     return 0;
     223             : }
     224             : 
     225         200 : static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     226             :                               const AVFrame *pict, int *got_packet)
     227             : {
     228         200 :     LJpegEncContext *s = avctx->priv_data;
     229             :     PutBitContext pb;
     230         200 :     const int width  = avctx->width;
     231         200 :     const int height = avctx->height;
     232         200 :     const int mb_width  = (width  + s->hsample[0] - 1) / s->hsample[0];
     233         200 :     const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
     234         200 :     int max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
     235             :     int ret, header_bits;
     236             : 
     237         200 :     if(    avctx->pix_fmt == AV_PIX_FMT_BGR0
     238         200 :         || avctx->pix_fmt == AV_PIX_FMT_BGR24)
     239           0 :         max_pkt_size += width * height * 3 * 4;
     240         200 :     else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
     241           0 :         max_pkt_size += width * height * 4 * 4;
     242             :     else {
     243         400 :         max_pkt_size += mb_width * mb_height * 3 * 4
     244         200 :                         * s->hsample[0] * s->vsample[0];
     245             :     }
     246             : 
     247         200 :     if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0)
     248           0 :         return ret;
     249             : 
     250         200 :     init_put_bits(&pb, pkt->data, pkt->size);
     251             : 
     252         200 :     ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
     253         200 :                                    s->pred, s->matrix, s->matrix);
     254             : 
     255         200 :     header_bits = put_bits_count(&pb);
     256             : 
     257         200 :     if(    avctx->pix_fmt == AV_PIX_FMT_BGR0
     258         200 :         || avctx->pix_fmt == AV_PIX_FMT_BGRA
     259         200 :         || avctx->pix_fmt == AV_PIX_FMT_BGR24)
     260           0 :         ret = ljpeg_encode_bgr(avctx, &pb, pict);
     261             :     else
     262         200 :         ret = ljpeg_encode_yuv(avctx, &pb, pict);
     263         200 :     if (ret < 0)
     264           0 :         return ret;
     265             : 
     266         200 :     emms_c();
     267             : 
     268         200 :     ff_mjpeg_escape_FF(&pb, header_bits >> 3);
     269         200 :     ff_mjpeg_encode_picture_trailer(&pb, header_bits);
     270             : 
     271         200 :     flush_put_bits(&pb);
     272         200 :     pkt->size   = put_bits_ptr(&pb) - pb.buf;
     273         200 :     pkt->flags |= AV_PKT_FLAG_KEY;
     274         200 :     *got_packet = 1;
     275             : 
     276         200 :     return 0;
     277             : }
     278             : 
     279           4 : static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
     280             : {
     281           4 :     LJpegEncContext *s = avctx->priv_data;
     282             : 
     283           4 :     av_freep(&s->scratch);
     284             : 
     285           4 :     return 0;
     286             : }
     287             : 
     288           4 : static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
     289             : {
     290           4 :     LJpegEncContext *s = avctx->priv_data;
     291             : 
     292           4 :     if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
     293           0 :          avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
     294           0 :          avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
     295           4 :          avctx->color_range == AVCOL_RANGE_MPEG) &&
     296           4 :         avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
     297           0 :         av_log(avctx, AV_LOG_ERROR,
     298             :                "Limited range YUV is non-standard, set strict_std_compliance to "
     299             :                "at least unofficial to use it.\n");
     300           0 :         return AVERROR(EINVAL);
     301             :     }
     302             : 
     303             : #if FF_API_CODED_FRAME
     304             : FF_DISABLE_DEPRECATION_WARNINGS
     305           4 :     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
     306           4 :     avctx->coded_frame->key_frame = 1;
     307             : FF_ENABLE_DEPRECATION_WARNINGS
     308             : #endif
     309             : 
     310           4 :     s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
     311           4 :     if (!s->scratch)
     312           0 :         goto fail;
     313             : 
     314           4 :     ff_idctdsp_init(&s->idsp, avctx);
     315           4 :     ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
     316             :                       ff_zigzag_direct);
     317             : 
     318           4 :     ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
     319             : 
     320           4 :     ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
     321           4 :                                  s->huff_code_dc_luminance,
     322             :                                  avpriv_mjpeg_bits_dc_luminance,
     323             :                                  avpriv_mjpeg_val_dc);
     324           4 :     ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
     325           4 :                                  s->huff_code_dc_chrominance,
     326             :                                  avpriv_mjpeg_bits_dc_chrominance,
     327             :                                  avpriv_mjpeg_val_dc);
     328             : 
     329           4 :     return 0;
     330           0 : fail:
     331           0 :     ljpeg_encode_close(avctx);
     332           0 :     return AVERROR(ENOMEM);
     333             : }
     334             : 
     335             : #define OFFSET(x) offsetof(LJpegEncContext, x)
     336             : #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
     337             : static const AVOption options[] = {
     338             : { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
     339             :     { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
     340             :     { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
     341             :     { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
     342             : 
     343             :     { NULL},
     344             : };
     345             : 
     346             : static const AVClass ljpeg_class = {
     347             :     .class_name = "ljpeg",
     348             :     .item_name  = av_default_item_name,
     349             :     .option     = options,
     350             :     .version    = LIBAVUTIL_VERSION_INT,
     351             : };
     352             : 
     353             : AVCodec ff_ljpeg_encoder = {
     354             :     .name           = "ljpeg",
     355             :     .long_name      = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
     356             :     .type           = AVMEDIA_TYPE_VIDEO,
     357             :     .id             = AV_CODEC_ID_LJPEG,
     358             :     .priv_data_size = sizeof(LJpegEncContext),
     359             :     .priv_class     = &ljpeg_class,
     360             :     .init           = ljpeg_encode_init,
     361             :     .encode2        = ljpeg_encode_frame,
     362             :     .close          = ljpeg_encode_close,
     363             :     .capabilities   = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY,
     364             :     .pix_fmts       = (const enum AVPixelFormat[]){
     365             :         AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
     366             :         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
     367             :         AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
     368             :         AV_PIX_FMT_NONE},
     369             : };

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