LCOV - code coverage report
Current view: top level - libavcodec - sunrastenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 75 109 68.8 %
Date: 2017-12-18 06:23:41 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder
       3             :  * Copyright (c) 2012 Aneesh Dogra (lionaneesh) <lionaneesh@gmail.com>
       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 "libavutil/opt.h"
      23             : 
      24             : #include "avcodec.h"
      25             : #include "bytestream.h"
      26             : #include "internal.h"
      27             : #include "sunrast.h"
      28             : 
      29             : typedef struct SUNRASTContext {
      30             :     AVClass *class;
      31             : 
      32             :     PutByteContext p;
      33             :     int depth;      ///< depth of pixel
      34             :     int length;     ///< length (bytes) of image
      35             :     int type;       ///< type of file
      36             :     int maptype;    ///< type of colormap
      37             :     int maplength;  ///< length (bytes) of colormap
      38             :     int size;
      39             : } SUNRASTContext;
      40             : 
      41          13 : static void sunrast_image_write_header(AVCodecContext *avctx)
      42             : {
      43          13 :     SUNRASTContext *s = avctx->priv_data;
      44             : 
      45          13 :     bytestream2_put_be32u(&s->p, RAS_MAGIC);
      46          13 :     bytestream2_put_be32u(&s->p, avctx->width);
      47          13 :     bytestream2_put_be32u(&s->p, avctx->height);
      48          13 :     bytestream2_put_be32u(&s->p, s->depth);
      49          13 :     bytestream2_put_be32u(&s->p, s->length);
      50          13 :     bytestream2_put_be32u(&s->p, s->type);
      51          13 :     bytestream2_put_be32u(&s->p, s->maptype);
      52          13 :     bytestream2_put_be32u(&s->p, s->maplength);
      53          13 : }
      54             : 
      55          13 : static void sunrast_image_write_image(AVCodecContext *avctx,
      56             :                                       const uint8_t *pixels,
      57             :                                       const uint32_t *palette_data,
      58             :                                       int linesize)
      59             : {
      60          13 :     SUNRASTContext *s = avctx->priv_data;
      61             :     const uint8_t *ptr;
      62             :     int len, alen, x, y;
      63             : 
      64          13 :     if (s->maplength) {     // palettized
      65             :         PutByteContext pb_r, pb_g;
      66           0 :         int len = s->maplength / 3;
      67             : 
      68           0 :         pb_r = s->p;
      69           0 :         bytestream2_skip_p(&s->p, len);
      70           0 :         pb_g = s->p;
      71           0 :         bytestream2_skip_p(&s->p, len);
      72             : 
      73           0 :         for (x = 0; x < len; x++) {
      74           0 :             uint32_t pixel = palette_data[x];
      75             : 
      76           0 :             bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
      77           0 :             bytestream2_put_byteu(&pb_g, (pixel >> 8)  & 0xFF);
      78           0 :             bytestream2_put_byteu(&s->p,  pixel        & 0xFF);
      79             :         }
      80             :     }
      81             : 
      82          13 :     len  = (s->depth * avctx->width + 7) >> 3;
      83          13 :     alen = len + (len & 1);
      84          13 :     ptr  = pixels;
      85             : 
      86          13 :      if (s->type == RT_BYTE_ENCODED) {
      87             :         uint8_t value, value2;
      88             :         int run;
      89             : 
      90          13 :         ptr = pixels;
      91             : 
      92             : #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x]
      93             : 
      94          13 :         x = 0, y = 0;
      95          13 :         value2 = GET_VALUE;
      96     3917860 :         while (y < avctx->height) {
      97     3917834 :             run = 1;
      98     3917834 :             value = value2;
      99     3917834 :             x++;
     100     3917834 :             if (x >= alen) {
     101        3718 :                 x = 0;
     102        3718 :                 ptr += linesize, y++;
     103             :             }
     104             : 
     105     3917834 :             value2 = GET_VALUE;
     106     7871498 :             while (value2 == value && run < 256 && y < avctx->height) {
     107       35830 :                 x++;
     108       35830 :                 run++;
     109       35830 :                 if (x >= alen) {
     110          26 :                     x = 0;
     111          26 :                     ptr += linesize, y++;
     112             :                 }
     113       35830 :                 value2 = GET_VALUE;
     114             :             }
     115             : 
     116     3917834 :             if (run > 2 || value == RLE_TRIGGER) {
     117        1396 :                 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
     118        1396 :                 bytestream2_put_byteu(&s->p, run - 1);
     119        2792 :                 if (run > 1)
     120        1396 :                     bytestream2_put_byteu(&s->p, value);
     121     3916438 :             } else if (run == 1) {
     122     3883890 :                 bytestream2_put_byteu(&s->p, value);
     123             :             } else
     124       32548 :                 bytestream2_put_be16u(&s->p, (value << 8) | value);
     125             :         }
     126             : 
     127             :         // update data length for header
     128          13 :         s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
     129             :     } else {
     130           0 :         for (y = 0; y < avctx->height; y++) {
     131           0 :             bytestream2_put_buffer(&s->p, ptr, len);
     132           0 :             if (len < alen)
     133           0 :                 bytestream2_put_byteu(&s->p, 0);
     134           0 :             ptr += linesize;
     135             :         }
     136             :     }
     137          13 : }
     138             : 
     139           1 : static av_cold int sunrast_encode_init(AVCodecContext *avctx)
     140             : {
     141           1 :     SUNRASTContext *s = avctx->priv_data;
     142             : 
     143             : #if FF_API_CODER_TYPE
     144             : FF_DISABLE_DEPRECATION_WARNINGS
     145           1 :     switch (avctx->coder_type) {
     146           1 :     case FF_CODER_TYPE_RLE:
     147           1 :         s->type = RT_BYTE_ENCODED;
     148           1 :         break;
     149           0 :     case FF_CODER_TYPE_RAW:
     150           0 :         s->type = RT_STANDARD;
     151           0 :         break;
     152           0 :     default:
     153           0 :         av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
     154           0 :         return AVERROR(EINVAL);
     155             :     }
     156             : FF_ENABLE_DEPRECATION_WARNINGS
     157           1 :     if (s->type != RT_BYTE_ENCODED && s->type != RT_STANDARD)
     158             : #endif
     159             :     // adjust boolean option to RT equivalent
     160           0 :     s->type++;
     161             : 
     162           1 :     s->maptype                    = RMT_NONE;
     163           1 :     s->maplength                  = 0;
     164             : 
     165           1 :     switch (avctx->pix_fmt) {
     166           0 :     case AV_PIX_FMT_MONOWHITE:
     167           0 :         s->depth = 1;
     168           0 :         break;
     169           0 :     case AV_PIX_FMT_PAL8 :
     170           0 :         s->maptype   = RMT_EQUAL_RGB;
     171           0 :         s->maplength = 3 * 256;
     172             :         /* fall-through */
     173           0 :     case AV_PIX_FMT_GRAY8:
     174           0 :         s->depth = 8;
     175           0 :         break;
     176           1 :     case AV_PIX_FMT_BGR24:
     177           1 :         s->depth = 24;
     178           1 :         break;
     179           0 :     default:
     180           0 :         return AVERROR_BUG;
     181             :     }
     182           1 :     s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
     183           1 :     s->size   = 32 + s->maplength + s->length * s->type;
     184             : 
     185           1 :     return 0;
     186             : }
     187             : 
     188          13 : static int sunrast_encode_frame(AVCodecContext *avctx,  AVPacket *avpkt,
     189             :                                 const AVFrame *frame, int *got_packet_ptr)
     190             : {
     191          13 :     SUNRASTContext *s = avctx->priv_data;
     192             :     int ret;
     193             : 
     194          13 :     if ((ret = ff_alloc_packet2(avctx, avpkt, s->size, 0)) < 0)
     195           0 :         return ret;
     196             : 
     197          13 :     bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
     198          13 :     sunrast_image_write_header(avctx);
     199          26 :     sunrast_image_write_image(avctx, frame->data[0],
     200          13 :                               (const uint32_t *)frame->data[1],
     201             :                               frame->linesize[0]);
     202             :     // update data length in header after RLE
     203          13 :     if (s->type == RT_BYTE_ENCODED)
     204          13 :         AV_WB32(&avpkt->data[16], s->length);
     205             : 
     206          13 :     *got_packet_ptr = 1;
     207          13 :     avpkt->flags |= AV_PKT_FLAG_KEY;
     208          13 :     avpkt->size = bytestream2_tell_p(&s->p);
     209          13 :     return 0;
     210             : }
     211             : 
     212             : #define OFFSET(x) offsetof(SUNRASTContext, x)
     213             : #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
     214             : static const AVOption options[] = {
     215             :     { "rle", "Use run-length compression", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
     216             : 
     217             :     { NULL },
     218             : };
     219             : 
     220             : static const AVClass sunrast_class = {
     221             :     .class_name = "sunrast",
     222             :     .item_name  = av_default_item_name,
     223             :     .option     = options,
     224             :     .version    = LIBAVUTIL_VERSION_INT,
     225             : };
     226             : 
     227             : #if FF_API_CODER_TYPE
     228             : static const AVCodecDefault sunrast_defaults[] = {
     229             :      { "coder", "rle" },
     230             :      { NULL },
     231             : };
     232             : #endif
     233             : 
     234             : AVCodec ff_sunrast_encoder = {
     235             :     .name           = "sunrast",
     236             :     .long_name      = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
     237             :     .type           = AVMEDIA_TYPE_VIDEO,
     238             :     .id             = AV_CODEC_ID_SUNRAST,
     239             :     .priv_data_size = sizeof(SUNRASTContext),
     240             :     .init           = sunrast_encode_init,
     241             :     .encode2        = sunrast_encode_frame,
     242             : #if FF_API_CODER_TYPE
     243             :     .defaults       = sunrast_defaults,
     244             : #endif
     245             :     .priv_class     = &sunrast_class,
     246             :     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
     247             :                                                   AV_PIX_FMT_PAL8,
     248             :                                                   AV_PIX_FMT_GRAY8,
     249             :                                                   AV_PIX_FMT_MONOWHITE,
     250             :                                                   AV_PIX_FMT_NONE },
     251             : };

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