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4349 | Serge | 1 | /* |
2 | * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder |
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3 | * Copyright (c) 2012 Aneesh Dogra (lionaneesh) |
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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 "avcodec.h" |
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23 | #include "bytestream.h" |
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24 | #include "internal.h" |
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25 | #include "sunrast.h" |
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26 | |||
27 | typedef struct SUNRASTContext { |
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28 | PutByteContext p; |
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29 | int depth; ///< depth of pixel |
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30 | int length; ///< length (bytes) of image |
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31 | int type; ///< type of file |
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32 | int maptype; ///< type of colormap |
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33 | int maplength; ///< length (bytes) of colormap |
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34 | int size; |
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35 | } SUNRASTContext; |
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36 | |||
37 | static void sunrast_image_write_header(AVCodecContext *avctx) |
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38 | { |
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39 | SUNRASTContext *s = avctx->priv_data; |
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40 | |||
41 | bytestream2_put_be32u(&s->p, RAS_MAGIC); |
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42 | bytestream2_put_be32u(&s->p, avctx->width); |
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43 | bytestream2_put_be32u(&s->p, avctx->height); |
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44 | bytestream2_put_be32u(&s->p, s->depth); |
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45 | bytestream2_put_be32u(&s->p, s->length); |
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46 | bytestream2_put_be32u(&s->p, s->type); |
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47 | bytestream2_put_be32u(&s->p, s->maptype); |
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48 | bytestream2_put_be32u(&s->p, s->maplength); |
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49 | } |
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50 | |||
51 | static void sunrast_image_write_image(AVCodecContext *avctx, |
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52 | const uint8_t *pixels, |
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53 | const uint32_t *palette_data, |
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54 | int linesize) |
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55 | { |
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56 | SUNRASTContext *s = avctx->priv_data; |
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57 | const uint8_t *ptr; |
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58 | int len, alen, x, y; |
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59 | |||
60 | if (s->maplength) { // palettized |
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61 | PutByteContext pb_r, pb_g; |
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62 | int len = s->maplength / 3; |
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63 | |||
64 | pb_r = s->p; |
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65 | bytestream2_skip_p(&s->p, len); |
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66 | pb_g = s->p; |
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67 | bytestream2_skip_p(&s->p, len); |
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68 | |||
69 | for (x = 0; x < len; x++) { |
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70 | uint32_t pixel = palette_data[x]; |
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71 | |||
72 | bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF); |
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73 | bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF); |
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74 | bytestream2_put_byteu(&s->p, pixel & 0xFF); |
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75 | } |
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76 | } |
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77 | |||
78 | len = (s->depth * avctx->width + 7) >> 3; |
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79 | alen = len + (len & 1); |
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80 | ptr = pixels; |
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81 | |||
82 | if (s->type == RT_BYTE_ENCODED) { |
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83 | uint8_t value, value2; |
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84 | int run; |
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85 | |||
86 | ptr = pixels; |
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87 | |||
88 | #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x] |
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89 | |||
90 | x = 0, y = 0; |
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91 | value2 = GET_VALUE; |
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92 | while (y < avctx->height) { |
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93 | run = 1; |
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94 | value = value2; |
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95 | x++; |
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96 | if (x >= alen) { |
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97 | x = 0; |
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98 | ptr += linesize, y++; |
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99 | } |
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100 | |||
101 | value2 = GET_VALUE; |
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102 | while (value2 == value && run < 256 && y < avctx->height) { |
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103 | x++; |
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104 | run++; |
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105 | if (x >= alen) { |
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106 | x = 0; |
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107 | ptr += linesize, y++; |
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108 | } |
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109 | value2 = GET_VALUE; |
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110 | } |
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111 | |||
112 | if (run > 2 || value == RLE_TRIGGER) { |
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113 | bytestream2_put_byteu(&s->p, RLE_TRIGGER); |
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114 | bytestream2_put_byteu(&s->p, run - 1); |
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115 | if (run > 1) |
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116 | bytestream2_put_byteu(&s->p, value); |
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117 | } else if (run == 1) { |
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118 | bytestream2_put_byteu(&s->p, value); |
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119 | } else |
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120 | bytestream2_put_be16u(&s->p, (value << 8) | value); |
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121 | } |
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122 | |||
123 | // update data length for header |
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124 | s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength; |
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125 | } else { |
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126 | for (y = 0; y < avctx->height; y++) { |
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127 | bytestream2_put_buffer(&s->p, ptr, len); |
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128 | if (len < alen) |
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129 | bytestream2_put_byteu(&s->p, 0); |
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130 | ptr += linesize; |
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131 | } |
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132 | } |
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133 | } |
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134 | |||
135 | static av_cold int sunrast_encode_init(AVCodecContext *avctx) |
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136 | { |
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137 | SUNRASTContext *s = avctx->priv_data; |
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138 | |||
139 | switch (avctx->coder_type) { |
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140 | case FF_CODER_TYPE_RLE: |
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141 | s->type = RT_BYTE_ENCODED; |
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142 | break; |
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143 | case FF_CODER_TYPE_RAW: |
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144 | s->type = RT_STANDARD; |
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145 | break; |
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146 | default: |
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147 | av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n"); |
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148 | return AVERROR(EINVAL); |
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149 | } |
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150 | |||
151 | s->maptype = RMT_NONE; |
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152 | s->maplength = 0; |
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153 | |||
154 | switch (avctx->pix_fmt) { |
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155 | case AV_PIX_FMT_MONOWHITE: |
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156 | s->depth = 1; |
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157 | break; |
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158 | case AV_PIX_FMT_PAL8 : |
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159 | s->maptype = RMT_EQUAL_RGB; |
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160 | s->maplength = 3 * 256; |
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161 | case AV_PIX_FMT_GRAY8: |
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162 | s->depth = 8; |
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163 | break; |
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164 | case AV_PIX_FMT_BGR24: |
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165 | s->depth = 24; |
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166 | break; |
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167 | default: |
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168 | return AVERROR_BUG; |
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169 | } |
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170 | s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3); |
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171 | s->size = 32 + s->maplength + |
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172 | s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1); |
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173 | |||
174 | return 0; |
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175 | } |
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176 | |||
177 | static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, |
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178 | const AVFrame *frame, int *got_packet_ptr) |
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179 | { |
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180 | SUNRASTContext *s = avctx->priv_data; |
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181 | int ret; |
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182 | |||
183 | if ((ret = ff_alloc_packet2(avctx, avpkt, s->size)) < 0) |
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184 | return ret; |
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185 | |||
186 | bytestream2_init_writer(&s->p, avpkt->data, avpkt->size); |
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187 | sunrast_image_write_header(avctx); |
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188 | sunrast_image_write_image(avctx, frame->data[0], |
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189 | (const uint32_t *)frame->data[1], |
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190 | frame->linesize[0]); |
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191 | // update data length in header after RLE |
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192 | if (s->type == RT_BYTE_ENCODED) |
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193 | AV_WB32(&avpkt->data[16], s->length); |
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194 | |||
195 | *got_packet_ptr = 1; |
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196 | avpkt->flags |= AV_PKT_FLAG_KEY; |
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197 | avpkt->size = bytestream2_tell_p(&s->p); |
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198 | return 0; |
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199 | } |
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200 | |||
201 | static const AVCodecDefault sunrast_defaults[] = { |
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202 | { "coder", "rle" }, |
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203 | { NULL }, |
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204 | }; |
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205 | |||
206 | AVCodec ff_sunrast_encoder = { |
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207 | .name = "sunrast", |
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208 | .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"), |
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209 | .type = AVMEDIA_TYPE_VIDEO, |
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210 | .id = AV_CODEC_ID_SUNRAST, |
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211 | .priv_data_size = sizeof(SUNRASTContext), |
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212 | .init = sunrast_encode_init, |
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213 | .encode2 = sunrast_encode_frame, |
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214 | .defaults = sunrast_defaults, |
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215 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, |
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216 | AV_PIX_FMT_PAL8, |
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217 | AV_PIX_FMT_GRAY8, |
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218 | AV_PIX_FMT_MONOWHITE, |
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219 | AV_PIX_FMT_NONE }, |
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220 | };>>>><>>>>>>>>>> |