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  1. /*
  2.  * PAM 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.  
  25. static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
  26.                             const AVFrame *p, int *got_packet)
  27. {
  28.     uint8_t *bytestream_start, *bytestream, *bytestream_end;
  29.     int i, h, w, n, linesize, depth, maxval, ret;
  30.     const char *tuple_type;
  31.     uint8_t *ptr;
  32.  
  33.     h = avctx->height;
  34.     w = avctx->width;
  35.     switch (avctx->pix_fmt) {
  36.     case AV_PIX_FMT_MONOBLACK:
  37.         n          = w;
  38.         depth      = 1;
  39.         maxval     = 1;
  40.         tuple_type = "BLACKANDWHITE";
  41.         break;
  42.     case AV_PIX_FMT_GRAY8:
  43.         n          = w;
  44.         depth      = 1;
  45.         maxval     = 255;
  46.         tuple_type = "GRAYSCALE";
  47.         break;
  48.     case AV_PIX_FMT_GRAY16BE:
  49.         n          = w * 2;
  50.         depth      = 1;
  51.         maxval     = 0xFFFF;
  52.         tuple_type = "GRAYSCALE";
  53.         break;
  54.     case AV_PIX_FMT_GRAY8A:
  55.         n          = w * 2;
  56.         depth      = 2;
  57.         maxval     = 255;
  58.         tuple_type = "GRAYSCALE_ALPHA";
  59.         break;
  60.     case AV_PIX_FMT_YA16BE:
  61.         n          = w * 4;
  62.         depth      = 2;
  63.         maxval     = 0xFFFF;
  64.         tuple_type = "GRAYSCALE_ALPHA";
  65.         break;
  66.     case AV_PIX_FMT_RGB24:
  67.         n          = w * 3;
  68.         depth      = 3;
  69.         maxval     = 255;
  70.         tuple_type = "RGB";
  71.         break;
  72.     case AV_PIX_FMT_RGBA:
  73.         n          = w * 4;
  74.         depth      = 4;
  75.         maxval     = 255;
  76.         tuple_type = "RGB_ALPHA";
  77.         break;
  78.     case AV_PIX_FMT_RGB48BE:
  79.         n          = w * 6;
  80.         depth      = 3;
  81.         maxval     = 0xFFFF;
  82.         tuple_type = "RGB";
  83.         break;
  84.     case AV_PIX_FMT_RGBA64BE:
  85.         n          = w * 8;
  86.         depth      = 4;
  87.         maxval     = 0xFFFF;
  88.         tuple_type = "RGB_ALPHA";
  89.         break;
  90.     default:
  91.         return -1;
  92.     }
  93.  
  94.     if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200, 0)) < 0)
  95.         return ret;
  96.  
  97.     bytestream_start =
  98.     bytestream       = pkt->data;
  99.     bytestream_end   = pkt->data + pkt->size;
  100.  
  101.     snprintf(bytestream, bytestream_end - bytestream,
  102.              "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
  103.              w, h, depth, maxval, tuple_type);
  104.     bytestream += strlen(bytestream);
  105.  
  106.     ptr      = p->data[0];
  107.     linesize = p->linesize[0];
  108.  
  109.     if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
  110.         int j;
  111.         for (i = 0; i < h; i++) {
  112.             for (j = 0; j < w; j++)
  113.                 *bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
  114.             ptr += linesize;
  115.         }
  116.     } else {
  117.         for (i = 0; i < h; i++) {
  118.             memcpy(bytestream, ptr, n);
  119.             bytestream += n;
  120.             ptr        += linesize;
  121.         }
  122.     }
  123.  
  124.     pkt->size   = bytestream - bytestream_start;
  125.     pkt->flags |= AV_PKT_FLAG_KEY;
  126.     *got_packet = 1;
  127.     return 0;
  128. }
  129.  
  130. static av_cold int pam_encode_init(AVCodecContext *avctx)
  131. {
  132. #if FF_API_CODED_FRAME
  133. FF_DISABLE_DEPRECATION_WARNINGS
  134.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  135.     avctx->coded_frame->key_frame = 1;
  136. FF_ENABLE_DEPRECATION_WARNINGS
  137. #endif
  138.  
  139.     return 0;
  140. }
  141.  
  142. AVCodec ff_pam_encoder = {
  143.     .name           = "pam",
  144.     .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
  145.     .type           = AVMEDIA_TYPE_VIDEO,
  146.     .id             = AV_CODEC_ID_PAM,
  147.     .init           = pam_encode_init,
  148.     .encode2        = pam_encode_frame,
  149.     .pix_fmts       = (const enum AVPixelFormat[]){
  150.         AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
  151.         AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE,
  152.         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
  153.         AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_YA16BE,
  154.         AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
  155.     },
  156. };
  157.