1/* 2 * PNM 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 "libavutil/pixdesc.h" 23#include "avcodec.h" 24#include "internal.h" 25 26static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 27 const AVFrame *p, int *got_packet) 28{ 29 uint8_t *bytestream, *bytestream_start, *bytestream_end; 30 int i, h, h1, c, n, linesize, ret; 31 uint8_t *ptr, *ptr1, *ptr2; 32 33 if ((ret = ff_alloc_packet2(avctx, pkt, avpicture_get_size(avctx->pix_fmt, 34 avctx->width, 35 avctx->height) + 200)) < 0) 36 return ret; 37 38 bytestream_start = 39 bytestream = pkt->data; 40 bytestream_end = pkt->data + pkt->size; 41 42 h = avctx->height; 43 h1 = h; 44 switch (avctx->pix_fmt) { 45 case AV_PIX_FMT_MONOWHITE: 46 c = '4'; 47 n = (avctx->width + 7) >> 3; 48 break; 49 case AV_PIX_FMT_GRAY8: 50 c = '5'; 51 n = avctx->width; 52 break; 53 case AV_PIX_FMT_GRAY16BE: 54 c = '5'; 55 n = avctx->width * 2; 56 break; 57 case AV_PIX_FMT_RGB24: 58 c = '6'; 59 n = avctx->width * 3; 60 break; 61 case AV_PIX_FMT_RGB48BE: 62 c = '6'; 63 n = avctx->width * 6; 64 break; 65 case AV_PIX_FMT_YUV420P: 66 if (avctx->width & 1 || avctx->height & 1) { 67 av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n"); 68 return AVERROR(EINVAL); 69 } 70 c = '5'; 71 n = avctx->width; 72 h1 = (h * 3) / 2; 73 break; 74 case AV_PIX_FMT_YUV420P16BE: 75 c = '5'; 76 n = avctx->width * 2; 77 h1 = (h * 3) / 2; 78 break; 79 default: 80 return -1; 81 } 82 snprintf(bytestream, bytestream_end - bytestream, 83 "P%c\n%d %d\n", c, avctx->width, h1); 84 bytestream += strlen(bytestream); 85 if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) { 86 int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1; 87 snprintf(bytestream, bytestream_end - bytestream, 88 "%d\n", maxdepth); 89 bytestream += strlen(bytestream); 90 } 91 92 ptr = p->data[0]; 93 linesize = p->linesize[0]; 94 for (i = 0; i < h; i++) { 95 memcpy(bytestream, ptr, n); 96 bytestream += n; 97 ptr += linesize; 98 } 99 100 if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) { 101 h >>= 1; 102 n >>= 1; 103 ptr1 = p->data[1]; 104 ptr2 = p->data[2]; 105 for (i = 0; i < h; i++) { 106 memcpy(bytestream, ptr1, n); 107 bytestream += n; 108 memcpy(bytestream, ptr2, n); 109 bytestream += n; 110 ptr1 += p->linesize[1]; 111 ptr2 += p->linesize[2]; 112 } 113 } 114 pkt->size = bytestream - bytestream_start; 115 pkt->flags |= AV_PKT_FLAG_KEY; 116 *got_packet = 1; 117 118 return 0; 119} 120 121static av_cold int pnm_encode_init(AVCodecContext *avctx) 122{ 123 avctx->coded_frame = av_frame_alloc(); 124 if (!avctx->coded_frame) 125 return AVERROR(ENOMEM); 126 127 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 128 avctx->coded_frame->key_frame = 1; 129 130 return 0; 131} 132 133static av_cold int pnm_encode_close(AVCodecContext *avctx) 134{ 135 av_frame_free(&avctx->coded_frame); 136 return 0; 137} 138 139#if CONFIG_PGM_ENCODER 140AVCodec ff_pgm_encoder = { 141 .name = "pgm", 142 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), 143 .type = AVMEDIA_TYPE_VIDEO, 144 .id = AV_CODEC_ID_PGM, 145 .init = pnm_encode_init, 146 .close = pnm_encode_close, 147 .encode2 = pnm_encode_frame, 148 .pix_fmts = (const enum AVPixelFormat[]){ 149 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE 150 }, 151}; 152#endif 153 154#if CONFIG_PGMYUV_ENCODER 155AVCodec ff_pgmyuv_encoder = { 156 .name = "pgmyuv", 157 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), 158 .type = AVMEDIA_TYPE_VIDEO, 159 .id = AV_CODEC_ID_PGMYUV, 160 .init = pnm_encode_init, 161 .close = pnm_encode_close, 162 .encode2 = pnm_encode_frame, 163 .pix_fmts = (const enum AVPixelFormat[]){ 164 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE 165 }, 166}; 167#endif 168 169#if CONFIG_PPM_ENCODER 170AVCodec ff_ppm_encoder = { 171 .name = "ppm", 172 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), 173 .type = AVMEDIA_TYPE_VIDEO, 174 .id = AV_CODEC_ID_PPM, 175 .init = pnm_encode_init, 176 .close = pnm_encode_close, 177 .encode2 = pnm_encode_frame, 178 .pix_fmts = (const enum AVPixelFormat[]){ 179 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE 180 }, 181}; 182#endif 183 184#if CONFIG_PBM_ENCODER 185AVCodec ff_pbm_encoder = { 186 .name = "pbm", 187 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), 188 .type = AVMEDIA_TYPE_VIDEO, 189 .id = AV_CODEC_ID_PBM, 190 .init = pnm_encode_init, 191 .close = pnm_encode_close, 192 .encode2 = pnm_encode_frame, 193 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE, 194 AV_PIX_FMT_NONE }, 195}; 196#endif 197