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4349 | Serge | 1 | /* |
2 | * PNM image format |
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3 | * Copyright (c) 2002, 2003 Fabrice Bellard |
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4 | * |
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5 | * This file is part of FFmpeg. |
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6 | * |
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7 | * FFmpeg is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public |
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9 | * License as published by the Free Software Foundation; either |
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10 | * version 2.1 of the License, or (at your option) any later version. |
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11 | * |
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12 | * FFmpeg is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with FFmpeg; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |||
22 | #include "libavutil/pixdesc.h" |
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23 | #include "avcodec.h" |
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24 | #include "internal.h" |
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25 | #include "pnm.h" |
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26 | |||
27 | |||
28 | static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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29 | const AVFrame *p, int *got_packet) |
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30 | { |
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31 | PNMContext *s = avctx->priv_data; |
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32 | int i, h, h1, c, n, linesize, ret; |
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33 | uint8_t *ptr, *ptr1, *ptr2; |
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34 | |||
35 | if ((ret = ff_alloc_packet2(avctx, pkt, avpicture_get_size(avctx->pix_fmt, |
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36 | avctx->width, |
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37 | avctx->height) + 200)) < 0) |
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38 | return ret; |
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39 | |||
40 | s->bytestream_start = |
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41 | s->bytestream = pkt->data; |
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42 | s->bytestream_end = pkt->data + pkt->size; |
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43 | |||
44 | h = avctx->height; |
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45 | h1 = h; |
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46 | switch (avctx->pix_fmt) { |
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47 | case AV_PIX_FMT_MONOWHITE: |
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48 | c = '4'; |
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49 | n = (avctx->width + 7) >> 3; |
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50 | break; |
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51 | case AV_PIX_FMT_GRAY8: |
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52 | c = '5'; |
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53 | n = avctx->width; |
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54 | break; |
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55 | case AV_PIX_FMT_GRAY16BE: |
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56 | c = '5'; |
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57 | n = avctx->width * 2; |
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58 | break; |
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59 | case AV_PIX_FMT_RGB24: |
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60 | c = '6'; |
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61 | n = avctx->width * 3; |
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62 | break; |
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63 | case AV_PIX_FMT_RGB48BE: |
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64 | c = '6'; |
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65 | n = avctx->width * 6; |
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66 | break; |
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67 | case AV_PIX_FMT_YUV420P: |
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68 | if (avctx->width & 1 || avctx->height & 1) { |
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69 | av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n"); |
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70 | return AVERROR(EINVAL); |
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71 | } |
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72 | c = '5'; |
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73 | n = avctx->width; |
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74 | h1 = (h * 3) / 2; |
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75 | break; |
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76 | case AV_PIX_FMT_YUV420P16BE: |
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77 | c = '5'; |
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78 | n = avctx->width * 2; |
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79 | h1 = (h * 3) / 2; |
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80 | break; |
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81 | default: |
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82 | return -1; |
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83 | } |
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84 | snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
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85 | "P%c\n%d %d\n", c, avctx->width, h1); |
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86 | s->bytestream += strlen(s->bytestream); |
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87 | if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) { |
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88 | int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1; |
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89 | snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
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90 | "%d\n", maxdepth); |
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91 | s->bytestream += strlen(s->bytestream); |
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92 | } |
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93 | |||
94 | ptr = p->data[0]; |
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95 | linesize = p->linesize[0]; |
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96 | for (i = 0; i < h; i++) { |
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97 | memcpy(s->bytestream, ptr, n); |
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98 | s->bytestream += n; |
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99 | ptr += linesize; |
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100 | } |
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101 | |||
102 | if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) { |
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103 | h >>= 1; |
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104 | n >>= 1; |
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105 | ptr1 = p->data[1]; |
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106 | ptr2 = p->data[2]; |
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107 | for (i = 0; i < h; i++) { |
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108 | memcpy(s->bytestream, ptr1, n); |
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109 | s->bytestream += n; |
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110 | memcpy(s->bytestream, ptr2, n); |
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111 | s->bytestream += n; |
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112 | ptr1 += p->linesize[1]; |
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113 | ptr2 += p->linesize[2]; |
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114 | } |
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115 | } |
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116 | pkt->size = s->bytestream - s->bytestream_start; |
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117 | pkt->flags |= AV_PKT_FLAG_KEY; |
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118 | *got_packet = 1; |
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119 | |||
120 | return 0; |
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121 | } |
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122 | |||
123 | |||
124 | #if CONFIG_PGM_ENCODER |
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125 | AVCodec ff_pgm_encoder = { |
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126 | .name = "pgm", |
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127 | .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
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128 | .type = AVMEDIA_TYPE_VIDEO, |
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129 | .id = AV_CODEC_ID_PGM, |
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130 | .priv_data_size = sizeof(PNMContext), |
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131 | .encode2 = pnm_encode_frame, |
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132 | .pix_fmts = (const enum AVPixelFormat[]){ |
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133 | AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE |
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134 | }, |
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135 | }; |
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136 | #endif |
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137 | |||
138 | #if CONFIG_PGMYUV_ENCODER |
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139 | AVCodec ff_pgmyuv_encoder = { |
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140 | .name = "pgmyuv", |
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141 | .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
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142 | .type = AVMEDIA_TYPE_VIDEO, |
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143 | .id = AV_CODEC_ID_PGMYUV, |
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144 | .priv_data_size = sizeof(PNMContext), |
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145 | .encode2 = pnm_encode_frame, |
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146 | .pix_fmts = (const enum AVPixelFormat[]){ |
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147 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE |
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148 | }, |
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149 | }; |
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150 | #endif |
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151 | |||
152 | #if CONFIG_PPM_ENCODER |
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153 | AVCodec ff_ppm_encoder = { |
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154 | .name = "ppm", |
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155 | .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
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156 | .type = AVMEDIA_TYPE_VIDEO, |
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157 | .id = AV_CODEC_ID_PPM, |
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158 | .priv_data_size = sizeof(PNMContext), |
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159 | .encode2 = pnm_encode_frame, |
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160 | .pix_fmts = (const enum AVPixelFormat[]){ |
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161 | AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE |
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162 | }, |
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163 | }; |
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164 | #endif |
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165 | |||
166 | #if CONFIG_PBM_ENCODER |
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167 | AVCodec ff_pbm_encoder = { |
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168 | .name = "pbm", |
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169 | .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
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170 | .type = AVMEDIA_TYPE_VIDEO, |
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171 | .id = AV_CODEC_ID_PBM, |
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172 | .priv_data_size = sizeof(PNMContext), |
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173 | .encode2 = pnm_encode_frame, |
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174 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE, |
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175 | AV_PIX_FMT_NONE }, |
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176 | }; |
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177 | #endif>>><>> |