| 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 | |
| 26 | static 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 | |
| 121 | static 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 | |
| 133 | static 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 |
| 140 | AVCodec 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 |
| 155 | AVCodec 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 |
| 170 | AVCodec 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 |
| 185 | AVCodec 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 |