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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * Indeo Video Interactive v4 compatible decoder |
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3 | * Copyright (c) 2009-2011 Maxim Poliakovski |
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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 | /** |
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23 | * @file |
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24 | * Indeo Video Interactive version 4 decoder |
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25 | * |
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26 | * Indeo 4 data is usually transported within .avi or .mov files. |
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27 | * Known FOURCCs: 'IV41' |
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28 | */ |
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29 | |||
30 | #define BITSTREAM_READER_LE |
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31 | #include "avcodec.h" |
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32 | #include "get_bits.h" |
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33 | #include "ivi_dsp.h" |
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34 | #include "ivi_common.h" |
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35 | #include "indeo4data.h" |
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36 | |||
37 | /** |
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38 | * Indeo 4 frame types. |
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39 | */ |
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40 | enum { |
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41 | FRAMETYPE_INTRA = 0, |
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42 | FRAMETYPE_INTRA1 = 1, ///< intra frame with slightly different bitstream coding |
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43 | FRAMETYPE_INTER = 2, ///< non-droppable P-frame |
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44 | FRAMETYPE_BIDIR = 3, ///< bidirectional frame |
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45 | FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame |
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46 | FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data |
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47 | FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data |
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48 | }; |
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49 | |||
50 | #define IVI4_PIC_SIZE_ESC 7 |
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51 | |||
52 | |||
53 | static const struct { |
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54 | InvTransformPtr *inv_trans; |
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55 | DCTransformPtr *dc_trans; |
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56 | int is_2d_trans; |
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57 | } transforms[18] = { |
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58 | { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, |
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59 | { ff_ivi_row_haar8, ff_ivi_dc_haar_2d, 0 }, |
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60 | { ff_ivi_col_haar8, ff_ivi_dc_haar_2d, 0 }, |
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61 | { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, |
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62 | { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, |
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63 | { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, |
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64 | { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, |
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65 | { NULL, NULL, 0 }, /* inverse DCT 8x8 */ |
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66 | { NULL, NULL, 0 }, /* inverse DCT 8x1 */ |
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67 | { NULL, NULL, 0 }, /* inverse DCT 1x8 */ |
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68 | { ff_ivi_inverse_haar_4x4, ff_ivi_dc_haar_2d, 1 }, |
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69 | { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, |
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70 | { NULL, NULL, 0 }, /* no transform 4x4 */ |
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71 | { ff_ivi_row_haar4, ff_ivi_dc_haar_2d, 0 }, |
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72 | { ff_ivi_col_haar4, ff_ivi_dc_haar_2d, 0 }, |
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73 | { ff_ivi_row_slant4, ff_ivi_dc_row_slant, 0 }, |
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74 | { ff_ivi_col_slant4, ff_ivi_dc_col_slant, 0 }, |
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75 | { NULL, NULL, 0 }, /* inverse DCT 4x4 */ |
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76 | }; |
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77 | |||
78 | /** |
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79 | * Decode subdivision of a plane. |
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80 | * This is a simplified version that checks for two supported subdivisions: |
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81 | * - 1 wavelet band per plane, size factor 1:1, code pattern: 3 |
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82 | * - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 |
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83 | * Anything else is either unsupported or corrupt. |
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84 | * |
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85 | * @param[in,out] gb the GetBit context |
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86 | * @return number of wavelet bands or 0 on error |
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87 | */ |
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88 | static int decode_plane_subdivision(GetBitContext *gb) |
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89 | { |
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90 | int i; |
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91 | |||
92 | switch (get_bits(gb, 2)) { |
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93 | case 3: |
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94 | return 1; |
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95 | case 2: |
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96 | for (i = 0; i < 4; i++) |
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97 | if (get_bits(gb, 2) != 3) |
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98 | return 0; |
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99 | return 4; |
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100 | default: |
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101 | return 0; |
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102 | } |
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103 | } |
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104 | |||
105 | static inline int scale_tile_size(int def_size, int size_factor) |
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106 | { |
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107 | return size_factor == 15 ? def_size : (size_factor + 1) << 5; |
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108 | } |
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109 | |||
110 | /** |
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111 | * Decode Indeo 4 picture header. |
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112 | * |
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113 | * @param[in,out] ctx pointer to the decoder context |
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114 | * @param[in] avctx pointer to the AVCodecContext |
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115 | * @return result code: 0 = OK, negative number = error |
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116 | */ |
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117 | static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
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118 | { |
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119 | int pic_size_indx, i, p; |
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120 | IVIPicConfig pic_conf; |
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121 | |||
122 | if (get_bits(&ctx->gb, 18) != 0x3FFF8) { |
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123 | av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); |
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124 | return AVERROR_INVALIDDATA; |
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125 | } |
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126 | |||
127 | ctx->prev_frame_type = ctx->frame_type; |
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128 | ctx->frame_type = get_bits(&ctx->gb, 3); |
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129 | if (ctx->frame_type == 7) { |
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130 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); |
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131 | return AVERROR_INVALIDDATA; |
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132 | } |
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133 | |||
134 | #if IVI4_STREAM_ANALYSER |
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135 | if (ctx->frame_type == FRAMETYPE_BIDIR) |
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136 | ctx->has_b_frames = 1; |
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137 | #endif |
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138 | |||
139 | ctx->transp_status = get_bits1(&ctx->gb); |
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140 | #if IVI4_STREAM_ANALYSER |
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141 | if (ctx->transp_status) { |
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142 | ctx->has_transp = 1; |
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143 | } |
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144 | #endif |
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145 | |||
146 | /* unknown bit: Mac decoder ignores this bit, XANIM returns error */ |
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147 | if (get_bits1(&ctx->gb)) { |
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148 | av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); |
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149 | return AVERROR_INVALIDDATA; |
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150 | } |
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151 | |||
152 | ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; |
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153 | |||
154 | /* null frames don't contain anything else so we just return */ |
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155 | if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) { |
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156 | av_dlog(avctx, "Null frame encountered!\n"); |
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157 | return 0; |
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158 | } |
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159 | |||
160 | /* Check key lock status. If enabled - ignore lock word. */ |
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161 | /* Usually we have to prompt the user for the password, but */ |
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162 | /* we don't do that because Indeo 4 videos can be decoded anyway */ |
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163 | if (get_bits1(&ctx->gb)) { |
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164 | skip_bits_long(&ctx->gb, 32); |
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165 | av_dlog(avctx, "Password-protected clip!\n"); |
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166 | } |
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167 | |||
168 | pic_size_indx = get_bits(&ctx->gb, 3); |
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169 | if (pic_size_indx == IVI4_PIC_SIZE_ESC) { |
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170 | pic_conf.pic_height = get_bits(&ctx->gb, 16); |
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171 | pic_conf.pic_width = get_bits(&ctx->gb, 16); |
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172 | } else { |
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173 | pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; |
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174 | pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; |
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175 | } |
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176 | |||
177 | /* Decode tile dimensions. */ |
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178 | if (get_bits1(&ctx->gb)) { |
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179 | pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); |
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180 | pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); |
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181 | #if IVI4_STREAM_ANALYSER |
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182 | ctx->uses_tiling = 1; |
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183 | #endif |
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184 | } else { |
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185 | pic_conf.tile_height = pic_conf.pic_height; |
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186 | pic_conf.tile_width = pic_conf.pic_width; |
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187 | } |
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188 | |||
189 | /* Decode chroma subsampling. We support only 4:4 aka YVU9. */ |
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190 | if (get_bits(&ctx->gb, 2)) { |
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191 | av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); |
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192 | return AVERROR_INVALIDDATA; |
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193 | } |
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194 | pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
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195 | pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
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196 | |||
197 | /* decode subdivision of the planes */ |
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198 | pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); |
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199 | pic_conf.chroma_bands = 0; |
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200 | if (pic_conf.luma_bands) |
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201 | pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); |
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202 | ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
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203 | if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { |
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204 | av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", |
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205 | pic_conf.luma_bands, pic_conf.chroma_bands); |
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206 | return AVERROR_INVALIDDATA; |
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207 | } |
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208 | |||
209 | /* check if picture layout was changed and reallocate buffers */ |
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210 | if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { |
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211 | if (ff_ivi_init_planes(ctx->planes, &pic_conf)) { |
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212 | av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
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213 | ctx->pic_conf.luma_bands = 0; |
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214 | return AVERROR(ENOMEM); |
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215 | } |
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216 | |||
217 | ctx->pic_conf = pic_conf; |
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218 | |||
219 | /* set default macroblock/block dimensions */ |
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220 | for (p = 0; p <= 2; p++) { |
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221 | for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
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222 | ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; |
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223 | ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; |
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224 | } |
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225 | } |
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226 | |||
227 | if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, |
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228 | ctx->pic_conf.tile_height)) { |
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229 | av_log(avctx, AV_LOG_ERROR, |
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230 | "Couldn't reallocate internal structures!\n"); |
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231 | return AVERROR(ENOMEM); |
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232 | } |
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233 | } |
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234 | |||
235 | ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; |
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236 | |||
237 | /* skip decTimeEst field if present */ |
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238 | if (get_bits1(&ctx->gb)) |
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239 | skip_bits(&ctx->gb, 8); |
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240 | |||
241 | /* decode macroblock and block huffman codebooks */ |
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242 | if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || |
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243 | ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) |
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244 | return AVERROR_INVALIDDATA; |
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245 | |||
246 | ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
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247 | |||
248 | ctx->in_imf = get_bits1(&ctx->gb); |
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249 | ctx->in_q = get_bits1(&ctx->gb); |
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250 | |||
251 | ctx->pic_glob_quant = get_bits(&ctx->gb, 5); |
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252 | |||
253 | /* TODO: ignore this parameter if unused */ |
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254 | ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; |
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255 | |||
256 | ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; |
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257 | |||
258 | /* skip picture header extension if any */ |
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259 | while (get_bits1(&ctx->gb)) { |
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260 | av_dlog(avctx, "Pic hdr extension encountered!\n"); |
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261 | skip_bits(&ctx->gb, 8); |
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262 | } |
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263 | |||
264 | if (get_bits1(&ctx->gb)) { |
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265 | av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); |
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266 | } |
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267 | |||
268 | align_get_bits(&ctx->gb); |
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269 | |||
270 | return 0; |
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271 | } |
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272 | |||
273 | |||
274 | /** |
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275 | * Decode Indeo 4 band header. |
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276 | * |
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277 | * @param[in,out] ctx pointer to the decoder context |
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278 | * @param[in,out] band pointer to the band descriptor |
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279 | * @param[in] avctx pointer to the AVCodecContext |
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280 | * @return result code: 0 = OK, negative number = error |
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281 | */ |
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282 | static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
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283 | AVCodecContext *avctx) |
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284 | { |
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285 | int plane, band_num, indx, transform_id, scan_indx; |
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286 | int i; |
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287 | |||
288 | plane = get_bits(&ctx->gb, 2); |
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289 | band_num = get_bits(&ctx->gb, 4); |
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290 | if (band->plane != plane || band->band_num != band_num) { |
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291 | av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); |
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292 | return AVERROR_INVALIDDATA; |
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293 | } |
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294 | |||
295 | band->is_empty = get_bits1(&ctx->gb); |
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296 | if (!band->is_empty) { |
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297 | int old_blk_size = band->blk_size; |
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298 | /* skip header size |
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299 | * If header size is not given, header size is 4 bytes. */ |
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300 | if (get_bits1(&ctx->gb)) |
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301 | skip_bits(&ctx->gb, 16); |
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302 | |||
303 | band->is_halfpel = get_bits(&ctx->gb, 2); |
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304 | if (band->is_halfpel >= 2) { |
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305 | av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", |
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306 | band->is_halfpel); |
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307 | return AVERROR_INVALIDDATA; |
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308 | } |
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309 | #if IVI4_STREAM_ANALYSER |
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310 | if (!band->is_halfpel) |
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311 | ctx->uses_fullpel = 1; |
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312 | #endif |
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313 | |||
314 | band->checksum_present = get_bits1(&ctx->gb); |
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315 | if (band->checksum_present) |
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316 | band->checksum = get_bits(&ctx->gb, 16); |
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317 | |||
318 | indx = get_bits(&ctx->gb, 2); |
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319 | if (indx == 3) { |
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320 | av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); |
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321 | return AVERROR_INVALIDDATA; |
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322 | } |
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323 | band->mb_size = 16 >> indx; |
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324 | band->blk_size = 8 >> (indx >> 1); |
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325 | |||
326 | band->inherit_mv = get_bits1(&ctx->gb); |
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327 | band->inherit_qdelta = get_bits1(&ctx->gb); |
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328 | |||
329 | band->glob_quant = get_bits(&ctx->gb, 5); |
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330 | |||
331 | if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) { |
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332 | transform_id = get_bits(&ctx->gb, 5); |
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333 | if (transform_id >= FF_ARRAY_ELEMS(transforms) || |
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334 | !transforms[transform_id].inv_trans) { |
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335 | avpriv_request_sample(avctx, "Transform %d", transform_id); |
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336 | return AVERROR_PATCHWELCOME; |
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337 | } |
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338 | if ((transform_id >= 7 && transform_id <= 9) || |
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339 | transform_id == 17) { |
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340 | avpriv_request_sample(avctx, "DCT transform"); |
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341 | return AVERROR_PATCHWELCOME; |
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342 | } |
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343 | |||
344 | if (transform_id < 10 && band->blk_size < 8) { |
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345 | av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n"); |
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346 | return AVERROR_INVALIDDATA; |
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347 | } |
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348 | #if IVI4_STREAM_ANALYSER |
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349 | if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) |
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350 | ctx->uses_haar = 1; |
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351 | #endif |
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352 | |||
353 | band->inv_transform = transforms[transform_id].inv_trans; |
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354 | band->dc_transform = transforms[transform_id].dc_trans; |
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355 | band->is_2d_trans = transforms[transform_id].is_2d_trans; |
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356 | |||
357 | if (transform_id < 10) |
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358 | band->transform_size = 8; |
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359 | else |
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360 | band->transform_size = 4; |
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361 | |||
362 | if (band->blk_size != band->transform_size) { |
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363 | av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); |
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364 | return AVERROR_INVALIDDATA; |
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365 | } |
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366 | |||
367 | scan_indx = get_bits(&ctx->gb, 4); |
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368 | if (scan_indx == 15) { |
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369 | av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); |
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370 | return AVERROR_INVALIDDATA; |
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371 | } |
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372 | if (scan_indx > 4 && scan_indx < 10) { |
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373 | if (band->blk_size != 4) { |
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374 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
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375 | return AVERROR_INVALIDDATA; |
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376 | } |
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377 | } else if (band->blk_size != 8) { |
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378 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
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379 | return AVERROR_INVALIDDATA; |
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380 | } |
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381 | |||
382 | band->scan = scan_index_to_tab[scan_indx]; |
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383 | band->scan_size = band->blk_size; |
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384 | |||
385 | band->quant_mat = get_bits(&ctx->gb, 5); |
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386 | if (band->quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) { |
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387 | |||
388 | if (band->quant_mat == 31) |
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389 | av_log(avctx, AV_LOG_ERROR, |
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390 | "Custom quant matrix encountered!\n"); |
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391 | else |
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392 | avpriv_request_sample(avctx, "Quantization matrix %d", |
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393 | band->quant_mat); |
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394 | band->quant_mat = -1; |
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395 | return AVERROR_INVALIDDATA; |
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396 | } |
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397 | } else { |
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398 | if (old_blk_size != band->blk_size) { |
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399 | av_log(avctx, AV_LOG_ERROR, |
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400 | "The band block size does not match the configuration " |
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401 | "inherited\n"); |
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402 | return AVERROR_INVALIDDATA; |
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403 | } |
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404 | if (band->quant_mat < 0) { |
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405 | av_log(avctx, AV_LOG_ERROR, "Invalid quant_mat inherited\n"); |
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406 | return AVERROR_INVALIDDATA; |
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407 | } |
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408 | } |
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409 | if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) { |
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410 | av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n"); |
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411 | band->quant_mat = 0; |
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412 | return AVERROR_INVALIDDATA; |
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413 | } |
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414 | if (band->scan_size != band->blk_size) { |
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415 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
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416 | return AVERROR_INVALIDDATA; |
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417 | } |
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418 | if (band->transform_size == 8 && band->blk_size < 8) { |
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419 | av_log(avctx, AV_LOG_ERROR, "mismatching transform_size!\n"); |
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420 | return AVERROR_INVALIDDATA; |
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421 | } |
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422 | |||
423 | /* decode block huffman codebook */ |
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424 | if (!get_bits1(&ctx->gb)) |
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425 | band->blk_vlc.tab = ctx->blk_vlc.tab; |
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426 | else |
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427 | if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF, |
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428 | &band->blk_vlc, avctx)) |
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429 | return AVERROR_INVALIDDATA; |
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430 | |||
431 | /* select appropriate rvmap table for this band */ |
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432 | band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
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433 | |||
434 | /* decode rvmap probability corrections if any */ |
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435 | band->num_corr = 0; /* there is no corrections */ |
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436 | if (get_bits1(&ctx->gb)) { |
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437 | band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ |
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438 | if (band->num_corr > 61) { |
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439 | av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", |
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440 | band->num_corr); |
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441 | return AVERROR_INVALIDDATA; |
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442 | } |
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443 | |||
444 | /* read correction pairs */ |
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445 | for (i = 0; i < band->num_corr * 2; i++) |
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446 | band->corr[i] = get_bits(&ctx->gb, 8); |
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447 | } |
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448 | } |
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449 | |||
450 | if (band->blk_size == 8) { |
||
451 | band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; |
||
452 | band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; |
||
453 | } else { |
||
454 | band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; |
||
455 | band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0]; |
||
456 | } |
||
457 | |||
458 | /* Indeo 4 doesn't use scale tables */ |
||
459 | band->intra_scale = NULL; |
||
460 | band->inter_scale = NULL; |
||
461 | |||
462 | align_get_bits(&ctx->gb); |
||
463 | |||
464 | if (!band->scan) { |
||
465 | av_log(avctx, AV_LOG_ERROR, "band->scan not set\n"); |
||
466 | return AVERROR_INVALIDDATA; |
||
467 | } |
||
468 | |||
469 | return 0; |
||
470 | } |
||
471 | |||
472 | |||
473 | /** |
||
474 | * Decode information (block type, cbp, quant delta, motion vector) |
||
475 | * for all macroblocks in the current tile. |
||
476 | * |
||
477 | * @param[in,out] ctx pointer to the decoder context |
||
478 | * @param[in,out] band pointer to the band descriptor |
||
479 | * @param[in,out] tile pointer to the tile descriptor |
||
480 | * @param[in] avctx pointer to the AVCodecContext |
||
481 | * @return result code: 0 = OK, negative number = error |
||
482 | */ |
||
483 | static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, |
||
484 | IVITile *tile, AVCodecContext *avctx) |
||
485 | { |
||
486 | int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb, |
||
487 | mv_scale, mb_type_bits, s; |
||
488 | IVIMbInfo *mb, *ref_mb; |
||
489 | int row_offset = band->mb_size * band->pitch; |
||
490 | |||
491 | mb = tile->mbs; |
||
492 | ref_mb = tile->ref_mbs; |
||
493 | offs = tile->ypos * band->pitch + tile->xpos; |
||
494 | |||
495 | blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
||
496 | mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1; |
||
497 | |||
498 | /* scale factor for motion vectors */ |
||
499 | mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
||
500 | mv_x = mv_y = 0; |
||
501 | |||
502 | if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) { |
||
503 | av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs); |
||
504 | return -1; |
||
505 | } |
||
506 | |||
507 | for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) { |
||
508 | mb_offset = offs; |
||
509 | |||
510 | for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) { |
||
511 | mb->xpos = x; |
||
512 | mb->ypos = y; |
||
513 | mb->buf_offs = mb_offset; |
||
514 | |||
515 | if (get_bits1(&ctx->gb)) { |
||
516 | if (ctx->frame_type == FRAMETYPE_INTRA) { |
||
517 | av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); |
||
518 | return AVERROR_INVALIDDATA; |
||
519 | } |
||
520 | mb->type = 1; /* empty macroblocks are always INTER */ |
||
521 | mb->cbp = 0; /* all blocks are empty */ |
||
522 | |||
523 | mb->q_delta = 0; |
||
524 | if (!band->plane && !band->band_num && ctx->in_q) { |
||
525 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
||
526 | IVI_VLC_BITS, 1); |
||
527 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
||
528 | } |
||
529 | |||
530 | mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ |
||
531 | if (band->inherit_mv && ref_mb) { |
||
532 | /* motion vector inheritance */ |
||
533 | if (mv_scale) { |
||
534 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
||
535 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
||
536 | } else { |
||
537 | mb->mv_x = ref_mb->mv_x; |
||
538 | mb->mv_y = ref_mb->mv_y; |
||
539 | } |
||
540 | } |
||
541 | } else { |
||
542 | if (band->inherit_mv) { |
||
543 | /* copy mb_type from corresponding reference mb */ |
||
544 | if (!ref_mb) { |
||
545 | av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n"); |
||
546 | return AVERROR_INVALIDDATA; |
||
547 | } |
||
548 | mb->type = ref_mb->type; |
||
549 | } else if (ctx->frame_type == FRAMETYPE_INTRA || |
||
550 | ctx->frame_type == FRAMETYPE_INTRA1) { |
||
551 | mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
||
552 | } else { |
||
553 | mb->type = get_bits(&ctx->gb, mb_type_bits); |
||
554 | } |
||
555 | |||
556 | mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
||
557 | |||
558 | mb->q_delta = 0; |
||
559 | if (band->inherit_qdelta) { |
||
560 | if (ref_mb) mb->q_delta = ref_mb->q_delta; |
||
561 | } else if (mb->cbp || (!band->plane && !band->band_num && |
||
562 | ctx->in_q)) { |
||
563 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
||
564 | IVI_VLC_BITS, 1); |
||
565 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
||
566 | } |
||
567 | |||
568 | if (!mb->type) { |
||
569 | mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ |
||
570 | } else { |
||
571 | if (band->inherit_mv) { |
||
572 | if (ref_mb) |
||
573 | /* motion vector inheritance */ |
||
574 | if (mv_scale) { |
||
575 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
||
576 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
||
577 | } else { |
||
578 | mb->mv_x = ref_mb->mv_x; |
||
579 | mb->mv_y = ref_mb->mv_y; |
||
580 | } |
||
581 | } else { |
||
582 | /* decode motion vector deltas */ |
||
583 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
||
584 | IVI_VLC_BITS, 1); |
||
585 | mv_y += IVI_TOSIGNED(mv_delta); |
||
586 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
||
587 | IVI_VLC_BITS, 1); |
||
588 | mv_x += IVI_TOSIGNED(mv_delta); |
||
589 | mb->mv_x = mv_x; |
||
590 | mb->mv_y = mv_y; |
||
591 | } |
||
592 | } |
||
593 | } |
||
594 | |||
595 | s= band->is_halfpel; |
||
596 | if (mb->type) |
||
597 | if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
||
598 | x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
||
599 | + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) { |
||
600 | av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
||
601 | return AVERROR_INVALIDDATA; |
||
602 | } |
||
603 | |||
604 | mb++; |
||
605 | if (ref_mb) |
||
606 | ref_mb++; |
||
607 | mb_offset += band->mb_size; |
||
608 | } |
||
609 | |||
610 | offs += row_offset; |
||
611 | } |
||
612 | |||
613 | align_get_bits(&ctx->gb); |
||
614 | |||
615 | return 0; |
||
616 | } |
||
617 | |||
618 | |||
619 | /** |
||
620 | * Rearrange decoding and reference buffers. |
||
621 | * |
||
622 | * @param[in,out] ctx pointer to the decoder context |
||
623 | */ |
||
624 | static void switch_buffers(IVI45DecContext *ctx) |
||
625 | { |
||
626 | switch (ctx->prev_frame_type) { |
||
627 | case FRAMETYPE_INTRA: |
||
628 | case FRAMETYPE_INTRA1: |
||
629 | case FRAMETYPE_INTER: |
||
630 | ctx->buf_switch ^= 1; |
||
631 | ctx->dst_buf = ctx->buf_switch; |
||
632 | ctx->ref_buf = ctx->buf_switch ^ 1; |
||
633 | break; |
||
634 | case FRAMETYPE_INTER_NOREF: |
||
635 | break; |
||
636 | } |
||
637 | |||
638 | switch (ctx->frame_type) { |
||
639 | case FRAMETYPE_INTRA: |
||
640 | case FRAMETYPE_INTRA1: |
||
641 | ctx->buf_switch = 0; |
||
642 | /* FALLTHROUGH */ |
||
643 | case FRAMETYPE_INTER: |
||
644 | ctx->dst_buf = ctx->buf_switch; |
||
645 | ctx->ref_buf = ctx->buf_switch ^ 1; |
||
646 | break; |
||
647 | case FRAMETYPE_INTER_NOREF: |
||
648 | case FRAMETYPE_NULL_FIRST: |
||
649 | case FRAMETYPE_NULL_LAST: |
||
650 | break; |
||
651 | } |
||
652 | } |
||
653 | |||
654 | |||
655 | static int is_nonnull_frame(IVI45DecContext *ctx) |
||
656 | { |
||
657 | return ctx->frame_type < FRAMETYPE_NULL_FIRST; |
||
658 | } |
||
659 | |||
660 | |||
661 | static av_cold int decode_init(AVCodecContext *avctx) |
||
662 | { |
||
663 | IVI45DecContext *ctx = avctx->priv_data; |
||
664 | |||
665 | ff_ivi_init_static_vlc(); |
||
666 | |||
667 | /* copy rvmap tables in our context so we can apply changes to them */ |
||
668 | memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); |
||
669 | |||
670 | /* Force allocation of the internal buffers */ |
||
671 | /* during picture header decoding. */ |
||
672 | ctx->pic_conf.pic_width = 0; |
||
673 | ctx->pic_conf.pic_height = 0; |
||
674 | |||
675 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
||
676 | |||
677 | ctx->decode_pic_hdr = decode_pic_hdr; |
||
678 | ctx->decode_band_hdr = decode_band_hdr; |
||
679 | ctx->decode_mb_info = decode_mb_info; |
||
680 | ctx->switch_buffers = switch_buffers; |
||
681 | ctx->is_nonnull_frame = is_nonnull_frame; |
||
682 | |||
683 | return 0; |
||
684 | } |
||
685 | |||
686 | |||
687 | AVCodec ff_indeo4_decoder = { |
||
688 | .name = "indeo4", |
||
689 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"), |
||
690 | .type = AVMEDIA_TYPE_VIDEO, |
||
691 | .id = AV_CODEC_ID_INDEO4, |
||
692 | .priv_data_size = sizeof(IVI45DecContext), |
||
693 | .init = decode_init, |
||
694 | .close = ff_ivi_decode_close, |
||
695 | .decode = ff_ivi_decode_frame, |
||
696 | .capabilities = CODEC_CAP_DR1, |
||
697 | };>>>>>>>>>=>>>=>>=>><>>>>>>>> |