| 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_RGB24: |
| 61 | n = w * 3; |
| 62 | depth = 3; |
| 63 | maxval = 255; |
| 64 | tuple_type = "RGB"; |
| 65 | break; |
| 66 | case AV_PIX_FMT_RGBA: |
| 67 | n = w * 4; |
| 68 | depth = 4; |
| 69 | maxval = 255; |
| 70 | tuple_type = "RGB_ALPHA"; |
| 71 | break; |
| 72 | case AV_PIX_FMT_RGB48BE: |
| 73 | n = w * 6; |
| 74 | depth = 3; |
| 75 | maxval = 0xFFFF; |
| 76 | tuple_type = "RGB"; |
| 77 | break; |
| 78 | case AV_PIX_FMT_RGBA64BE: |
| 79 | n = w * 8; |
| 80 | depth = 4; |
| 81 | maxval = 0xFFFF; |
| 82 | tuple_type = "RGB_ALPHA"; |
| 83 | break; |
| 84 | default: |
| 85 | return -1; |
| 86 | } |
| 87 | |
| 88 | if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0) |
| 89 | return ret; |
| 90 | |
| 91 | bytestream_start = |
| 92 | bytestream = pkt->data; |
| 93 | bytestream_end = pkt->data + pkt->size; |
| 94 | |
| 95 | snprintf(bytestream, bytestream_end - bytestream, |
| 96 | "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n", |
| 97 | w, h, depth, maxval, tuple_type); |
| 98 | bytestream += strlen(bytestream); |
| 99 | |
| 100 | ptr = p->data[0]; |
| 101 | linesize = p->linesize[0]; |
| 102 | |
| 103 | if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){ |
| 104 | int j; |
| 105 | for (i = 0; i < h; i++) { |
| 106 | for (j = 0; j < w; j++) |
| 107 | *bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1; |
| 108 | ptr += linesize; |
| 109 | } |
| 110 | } else { |
| 111 | for (i = 0; i < h; i++) { |
| 112 | memcpy(bytestream, ptr, n); |
| 113 | bytestream += n; |
| 114 | ptr += linesize; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | pkt->size = bytestream - bytestream_start; |
| 119 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 120 | *got_packet = 1; |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | static av_cold int pam_encode_init(AVCodecContext *avctx) |
| 125 | { |
| 126 | avctx->coded_frame = av_frame_alloc(); |
| 127 | if (!avctx->coded_frame) |
| 128 | return AVERROR(ENOMEM); |
| 129 | |
| 130 | avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; |
| 131 | avctx->coded_frame->key_frame = 1; |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | static av_cold int pam_encode_close(AVCodecContext *avctx) |
| 137 | { |
| 138 | av_frame_free(&avctx->coded_frame); |
| 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 | .close = pam_encode_close, |
| 149 | .encode2 = pam_encode_frame, |
| 150 | .pix_fmts = (const enum AVPixelFormat[]){ |
| 151 | AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE |
| 152 | }, |
| 153 | }; |