Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/indeo3.c |
Date: | 2022-07-04 00:18:54 |
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Lines: | 381 | 483 | 78.9% |
Branches: | 243 | 375 | 64.8% |
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1 | /* | ||
2 | * Indeo Video v3 compatible decoder | ||
3 | * Copyright (c) 2009 - 2011 Maxim Poliakovski | ||
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 | /** | ||
23 | * @file | ||
24 | * This is a decoder for Intel Indeo Video v3. | ||
25 | * It is based on vector quantization, run-length coding and motion compensation. | ||
26 | * Known container formats: .avi and .mov | ||
27 | * Known FOURCCs: 'IV31', 'IV32' | ||
28 | * | ||
29 | * @see http://wiki.multimedia.cx/index.php?title=Indeo_3 | ||
30 | */ | ||
31 | |||
32 | #include "libavutil/imgutils.h" | ||
33 | #include "libavutil/intreadwrite.h" | ||
34 | #include "libavutil/thread.h" | ||
35 | #include "avcodec.h" | ||
36 | #include "codec_internal.h" | ||
37 | #include "copy_block.h" | ||
38 | #include "bytestream.h" | ||
39 | #include "get_bits.h" | ||
40 | #include "hpeldsp.h" | ||
41 | #include "internal.h" | ||
42 | |||
43 | #include "indeo3data.h" | ||
44 | |||
45 | /* RLE opcodes. */ | ||
46 | enum { | ||
47 | RLE_ESC_F9 = 249, ///< same as RLE_ESC_FA + do the same with next block | ||
48 | RLE_ESC_FA = 250, ///< INTRA: skip block, INTER: copy data from reference | ||
49 | RLE_ESC_FB = 251, ///< apply null delta to N blocks / skip N blocks | ||
50 | RLE_ESC_FC = 252, ///< same as RLE_ESC_FD + do the same with next block | ||
51 | RLE_ESC_FD = 253, ///< apply null delta to all remaining lines of this block | ||
52 | RLE_ESC_FE = 254, ///< apply null delta to all lines up to the 3rd line | ||
53 | RLE_ESC_FF = 255 ///< apply null delta to all lines up to the 2nd line | ||
54 | }; | ||
55 | |||
56 | |||
57 | /* Some constants for parsing frame bitstream flags. */ | ||
58 | #define BS_8BIT_PEL (1 << 1) ///< 8-bit pixel bitdepth indicator | ||
59 | #define BS_KEYFRAME (1 << 2) ///< intra frame indicator | ||
60 | #define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator | ||
61 | #define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator | ||
62 | #define BS_NONREF (1 << 8) ///< nonref (discardable) frame indicator | ||
63 | #define BS_BUFFER 9 ///< indicates which of two frame buffers should be used | ||
64 | |||
65 | |||
66 | typedef struct Plane { | ||
67 | uint8_t *buffers[2]; | ||
68 | uint8_t *pixels[2]; ///< pointer to the actual pixel data of the buffers above | ||
69 | uint32_t width; | ||
70 | uint32_t height; | ||
71 | ptrdiff_t pitch; | ||
72 | } Plane; | ||
73 | |||
74 | #define CELL_STACK_MAX 20 | ||
75 | |||
76 | typedef struct Cell { | ||
77 | int16_t xpos; ///< cell coordinates in 4x4 blocks | ||
78 | int16_t ypos; | ||
79 | int16_t width; ///< cell width in 4x4 blocks | ||
80 | int16_t height; ///< cell height in 4x4 blocks | ||
81 | uint8_t tree; ///< tree id: 0- MC tree, 1 - VQ tree | ||
82 | const int8_t *mv_ptr; ///< ptr to the motion vector if any | ||
83 | } Cell; | ||
84 | |||
85 | typedef struct Indeo3DecodeContext { | ||
86 | AVCodecContext *avctx; | ||
87 | HpelDSPContext hdsp; | ||
88 | |||
89 | GetBitContext gb; | ||
90 | int need_resync; | ||
91 | int skip_bits; | ||
92 | const uint8_t *next_cell_data; | ||
93 | const uint8_t *last_byte; | ||
94 | const int8_t *mc_vectors; | ||
95 | unsigned num_vectors; ///< number of motion vectors in mc_vectors | ||
96 | |||
97 | int16_t width, height; | ||
98 | uint32_t frame_num; ///< current frame number (zero-based) | ||
99 | int data_size; ///< size of the frame data in bytes | ||
100 | uint16_t frame_flags; ///< frame properties | ||
101 | uint8_t cb_offset; ///< needed for selecting VQ tables | ||
102 | uint8_t buf_sel; ///< active frame buffer: 0 - primary, 1 -secondary | ||
103 | const uint8_t *y_data_ptr; | ||
104 | const uint8_t *v_data_ptr; | ||
105 | const uint8_t *u_data_ptr; | ||
106 | int32_t y_data_size; | ||
107 | int32_t v_data_size; | ||
108 | int32_t u_data_size; | ||
109 | const uint8_t *alt_quant; ///< secondary VQ table set for the modes 1 and 4 | ||
110 | Plane planes[3]; | ||
111 | } Indeo3DecodeContext; | ||
112 | |||
113 | |||
114 | static uint8_t requant_tab[8][128]; | ||
115 | |||
116 | /* | ||
117 | * Build the static requantization table. | ||
118 | * This table is used to remap pixel values according to a specific | ||
119 | * quant index and thus avoid overflows while adding deltas. | ||
120 | */ | ||
121 | 2 | static av_cold void build_requant_tab(void) | |
122 | { | ||
123 | static const int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 }; | ||
124 | static const int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 }; | ||
125 | |||
126 | int i, j, step; | ||
127 | |||
128 |
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18 | for (i = 0; i < 8; i++) { |
129 | 16 | step = i + 2; | |
130 |
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2064 | for (j = 0; j < 128; j++) |
131 | 2048 | requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i]; | |
132 | } | ||
133 | |||
134 | /* some last elements calculated above will have values >= 128 */ | ||
135 | /* pixel values shall never exceed 127 so set them to non-overflowing values */ | ||
136 | /* according with the quantization step of the respective section */ | ||
137 | 2 | requant_tab[0][127] = 126; | |
138 | 2 | requant_tab[1][119] = 118; | |
139 | 2 | requant_tab[1][120] = 118; | |
140 | 2 | requant_tab[2][126] = 124; | |
141 | 2 | requant_tab[2][127] = 124; | |
142 | 2 | requant_tab[6][124] = 120; | |
143 | 2 | requant_tab[6][125] = 120; | |
144 | 2 | requant_tab[6][126] = 120; | |
145 | 2 | requant_tab[6][127] = 120; | |
146 | |||
147 | /* Patch for compatibility with the Intel's binary decoders */ | ||
148 | 2 | requant_tab[1][7] = 10; | |
149 | 2 | requant_tab[4][8] = 10; | |
150 | 2 | } | |
151 | |||
152 | |||
153 | 4 | static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx) | |
154 | { | ||
155 | int p; | ||
156 | |||
157 | 4 | ctx->width = ctx->height = 0; | |
158 | |||
159 |
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16 | for (p = 0; p < 3; p++) { |
160 | 12 | av_freep(&ctx->planes[p].buffers[0]); | |
161 | 12 | av_freep(&ctx->planes[p].buffers[1]); | |
162 | 12 | ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0; | |
163 | } | ||
164 | 4 | } | |
165 | |||
166 | |||
167 | 4 | static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx, | |
168 | AVCodecContext *avctx, int luma_width, int luma_height) | ||
169 | { | ||
170 | int p, chroma_width, chroma_height; | ||
171 | int luma_size, chroma_size; | ||
172 | ptrdiff_t luma_pitch, chroma_pitch; | ||
173 | |||
174 |
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4 | if (luma_width < 16 || luma_width > 640 || |
175 |
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4 | luma_height < 16 || luma_height > 480 || |
176 |
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4 | luma_width & 1 || luma_height & 1) { |
177 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n", | |
178 | luma_width, luma_height); | ||
179 | ✗ | return AVERROR_INVALIDDATA; | |
180 | } | ||
181 | |||
182 | 4 | ctx->width = luma_width ; | |
183 | 4 | ctx->height = luma_height; | |
184 | |||
185 | 4 | chroma_width = FFALIGN(luma_width >> 2, 4); | |
186 | 4 | chroma_height = FFALIGN(luma_height >> 2, 4); | |
187 | |||
188 | 4 | luma_pitch = FFALIGN(luma_width, 16); | |
189 | 4 | chroma_pitch = FFALIGN(chroma_width, 16); | |
190 | |||
191 | /* Calculate size of the luminance plane. */ | ||
192 | /* Add one line more for INTRA prediction. */ | ||
193 | 4 | luma_size = luma_pitch * (luma_height + 1); | |
194 | |||
195 | /* Calculate size of a chrominance planes. */ | ||
196 | /* Add one line more for INTRA prediction. */ | ||
197 | 4 | chroma_size = chroma_pitch * (chroma_height + 1); | |
198 | |||
199 | /* allocate frame buffers */ | ||
200 |
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16 | for (p = 0; p < 3; p++) { |
201 |
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12 | ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch; |
202 |
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12 | ctx->planes[p].width = !p ? luma_width : chroma_width; |
203 |
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12 | ctx->planes[p].height = !p ? luma_height : chroma_height; |
204 | |||
205 |
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12 | ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size); |
206 |
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12 | ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size); |
207 | |||
208 |
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12 | if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1]) |
209 | ✗ | return AVERROR(ENOMEM); | |
210 | |||
211 | /* fill the INTRA prediction lines with the middle pixel value = 64 */ | ||
212 | 12 | memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch); | |
213 | 12 | memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch); | |
214 | |||
215 | /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */ | ||
216 | 12 | ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch; | |
217 | 12 | ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch; | |
218 | 12 | memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height); | |
219 | 12 | memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height); | |
220 | } | ||
221 | |||
222 | 4 | return 0; | |
223 | } | ||
224 | |||
225 | /** | ||
226 | * Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into | ||
227 | * the cell(x, y) in the current frame. | ||
228 | * | ||
229 | * @param ctx pointer to the decoder context | ||
230 | * @param plane pointer to the plane descriptor | ||
231 | * @param cell pointer to the cell descriptor | ||
232 | */ | ||
233 | 1683 | static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell) | |
234 | { | ||
235 | int h, w, mv_x, mv_y, offset, offset_dst; | ||
236 | uint8_t *src, *dst; | ||
237 | |||
238 | /* setup output and reference pointers */ | ||
239 | 1683 | offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2); | |
240 | 1683 | dst = plane->pixels[ctx->buf_sel] + offset_dst; | |
241 |
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1683 | if(cell->mv_ptr){ |
242 | 1683 | mv_y = cell->mv_ptr[0]; | |
243 | 1683 | mv_x = cell->mv_ptr[1]; | |
244 | }else | ||
245 | ✗ | mv_x= mv_y= 0; | |
246 | |||
247 | /* -1 because there is an extra line on top for prediction */ | ||
248 |
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1683 | if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 || |
249 |
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1683 | ((cell->ypos + cell->height) << 2) + mv_y > plane->height || |
250 |
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1683 | ((cell->xpos + cell->width) << 2) + mv_x > plane->width) { |
251 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
252 | "Motion vectors point out of the frame.\n"); | ||
253 | ✗ | return AVERROR_INVALIDDATA; | |
254 | } | ||
255 | |||
256 | 1683 | offset = offset_dst + mv_y * plane->pitch + mv_x; | |
257 | 1683 | src = plane->pixels[ctx->buf_sel ^ 1] + offset; | |
258 | |||
259 | 1683 | h = cell->height << 2; | |
260 | |||
261 |
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4624 | for (w = cell->width; w > 0;) { |
262 | /* copy using 16xH blocks */ | ||
263 |
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2941 | if (!((cell->xpos << 2) & 15) && w >= 4) { |
264 |
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1682 | for (; w >= 4; src += 16, dst += 16, w -= 4) |
265 | 841 | ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h); | |
266 | } | ||
267 | |||
268 | /* copy using 8xH blocks */ | ||
269 |
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2941 | if (!((cell->xpos << 2) & 7) && w >= 2) { |
270 | 2519 | ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h); | |
271 | 2519 | w -= 2; | |
272 | 2519 | src += 8; | |
273 | 2519 | dst += 8; | |
274 |
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422 | } else if (w >= 1) { |
275 | ✗ | ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h); | |
276 | ✗ | w--; | |
277 | ✗ | src += 4; | |
278 | ✗ | dst += 4; | |
279 | } | ||
280 | } | ||
281 | |||
282 | 1683 | return 0; | |
283 | } | ||
284 | |||
285 | |||
286 | /* Average 4/8 pixels at once without rounding using SWAR */ | ||
287 | #define AVG_32(dst, src, ref) \ | ||
288 | AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL) | ||
289 | |||
290 | #define AVG_64(dst, src, ref) \ | ||
291 | AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL) | ||
292 | |||
293 | |||
294 | /* | ||
295 | * Replicate each even pixel as follows: | ||
296 | * ABCDEFGH -> AACCEEGG | ||
297 | */ | ||
298 | 3811 | static inline uint64_t replicate64(uint64_t a) { | |
299 | #if HAVE_BIGENDIAN | ||
300 | a &= 0xFF00FF00FF00FF00ULL; | ||
301 | a |= a >> 8; | ||
302 | #else | ||
303 | 3811 | a &= 0x00FF00FF00FF00FFULL; | |
304 | 3811 | a |= a << 8; | |
305 | #endif | ||
306 | 3811 | return a; | |
307 | } | ||
308 | |||
309 | 12140 | static inline uint32_t replicate32(uint32_t a) { | |
310 | #if HAVE_BIGENDIAN | ||
311 | a &= 0xFF00FF00UL; | ||
312 | a |= a >> 8; | ||
313 | #else | ||
314 | 12140 | a &= 0x00FF00FFUL; | |
315 | 12140 | a |= a << 8; | |
316 | #endif | ||
317 | 12140 | return a; | |
318 | } | ||
319 | |||
320 | |||
321 | /* Fill n lines with 64-bit pixel value pix */ | ||
322 | 17347 | static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n, | |
323 | int32_t row_offset) | ||
324 | { | ||
325 |
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128722 | for (; n > 0; dst += row_offset, n--) |
326 | 111375 | AV_WN64A(dst, pix); | |
327 | 17347 | } | |
328 | |||
329 | |||
330 | /* Error codes for cell decoding. */ | ||
331 | enum { | ||
332 | IV3_NOERR = 0, | ||
333 | IV3_BAD_RLE = 1, | ||
334 | IV3_BAD_DATA = 2, | ||
335 | IV3_BAD_COUNTER = 3, | ||
336 | IV3_UNSUPPORTED = 4, | ||
337 | IV3_OUT_OF_DATA = 5 | ||
338 | }; | ||
339 | |||
340 | |||
341 | #define BUFFER_PRECHECK \ | ||
342 | if (*data_ptr >= last_ptr) \ | ||
343 | return IV3_OUT_OF_DATA; \ | ||
344 | |||
345 | #define RLE_BLOCK_COPY \ | ||
346 | if (cell->mv_ptr || !skip_flag) \ | ||
347 | copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom) | ||
348 | |||
349 | #define RLE_BLOCK_COPY_8 \ | ||
350 | pix64 = AV_RN64(ref);\ | ||
351 | if (is_first_row) {/* special prediction case: top line of a cell */\ | ||
352 | pix64 = replicate64(pix64);\ | ||
353 | fill_64(dst + row_offset, pix64, 7, row_offset);\ | ||
354 | AVG_64(dst, ref, dst + row_offset);\ | ||
355 | } else \ | ||
356 | fill_64(dst, pix64, 8, row_offset) | ||
357 | |||
358 | #define RLE_LINES_COPY \ | ||
359 | copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom) | ||
360 | |||
361 | #define RLE_LINES_COPY_M10 \ | ||
362 | pix64 = AV_RN64(ref);\ | ||
363 | if (is_top_of_cell) {\ | ||
364 | pix64 = replicate64(pix64);\ | ||
365 | fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\ | ||
366 | AVG_64(dst, ref, dst + row_offset);\ | ||
367 | } else \ | ||
368 | fill_64(dst, pix64, num_lines << 1, row_offset) | ||
369 | |||
370 | #define APPLY_DELTA_4 \ | ||
371 | AV_WN16A(dst + line_offset ,\ | ||
372 | (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | ||
373 | AV_WN16A(dst + line_offset + 2,\ | ||
374 | (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | ||
375 | if (mode >= 3) {\ | ||
376 | if (is_top_of_cell && !cell->ypos) {\ | ||
377 | AV_COPY32U(dst, dst + row_offset);\ | ||
378 | } else {\ | ||
379 | AVG_32(dst, ref, dst + row_offset);\ | ||
380 | }\ | ||
381 | } | ||
382 | |||
383 | #define APPLY_DELTA_8 \ | ||
384 | /* apply two 32-bit VQ deltas to next even line */\ | ||
385 | if (is_top_of_cell) { \ | ||
386 | AV_WN32A(dst + row_offset , \ | ||
387 | (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | ||
388 | AV_WN32A(dst + row_offset + 4, \ | ||
389 | (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | ||
390 | } else { \ | ||
391 | AV_WN32A(dst + row_offset , \ | ||
392 | (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | ||
393 | AV_WN32A(dst + row_offset + 4, \ | ||
394 | (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | ||
395 | } \ | ||
396 | /* odd lines are not coded but rather interpolated/replicated */\ | ||
397 | /* first line of the cell on the top of image? - replicate */\ | ||
398 | /* otherwise - interpolate */\ | ||
399 | if (is_top_of_cell && !cell->ypos) {\ | ||
400 | AV_COPY64U(dst, dst + row_offset);\ | ||
401 | } else \ | ||
402 | AVG_64(dst, ref, dst + row_offset); | ||
403 | |||
404 | |||
405 | #define APPLY_DELTA_1011_INTER \ | ||
406 | if (mode == 10) { \ | ||
407 | AV_WN32A(dst , \ | ||
408 | (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | ||
409 | AV_WN32A(dst + 4 , \ | ||
410 | (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | ||
411 | AV_WN32A(dst + row_offset , \ | ||
412 | (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | ||
413 | AV_WN32A(dst + row_offset + 4, \ | ||
414 | (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | ||
415 | } else { \ | ||
416 | AV_WN16A(dst , \ | ||
417 | (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | ||
418 | AV_WN16A(dst + 2 , \ | ||
419 | (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | ||
420 | AV_WN16A(dst + row_offset , \ | ||
421 | (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | ||
422 | AV_WN16A(dst + row_offset + 2, \ | ||
423 | (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | ||
424 | } | ||
425 | |||
426 | |||
427 | 15944 | static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell, | |
428 | uint8_t *block, uint8_t *ref_block, | ||
429 | ptrdiff_t row_offset, int h_zoom, int v_zoom, int mode, | ||
430 | const vqEntry *delta[2], int swap_quads[2], | ||
431 | const uint8_t **data_ptr, const uint8_t *last_ptr) | ||
432 | { | ||
433 | int x, y, line, num_lines; | ||
434 | 15944 | int rle_blocks = 0; | |
435 | uint8_t code, *dst, *ref; | ||
436 | const vqEntry *delta_tab; | ||
437 | unsigned int dyad1, dyad2; | ||
438 | uint64_t pix64; | ||
439 | 15944 | int skip_flag = 0, is_top_of_cell, is_first_row = 1; | |
440 | int blk_row_offset, line_offset; | ||
441 | |||
442 | 15944 | blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2); | |
443 |
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15944 | line_offset = v_zoom ? row_offset : 0; |
444 | |||
445 |
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15944 | if (cell->height & v_zoom || cell->width & h_zoom) |
446 | ✗ | return IV3_BAD_DATA; | |
447 | |||
448 |
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93487 | for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) { |
449 |
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427098 | for (x = 0; x < cell->width; x += 1 + h_zoom) { |
450 | 349555 | ref = ref_block; | |
451 | 349555 | dst = block; | |
452 | |||
453 |
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349555 | if (rle_blocks > 0) { |
454 |
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76314 | if (mode <= 4) { |
455 |
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60984 | RLE_BLOCK_COPY; |
456 |
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15330 | } else if (mode == 10 && !cell->mv_ptr) { |
457 |
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8469 | RLE_BLOCK_COPY_8; |
458 | } | ||
459 | 76314 | rle_blocks--; | |
460 | } else { | ||
461 |
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1187685 | for (line = 0; line < 4;) { |
462 | 914444 | num_lines = 1; | |
463 |
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914444 | is_top_of_cell = is_first_row && !line; |
464 | |||
465 | /* select primary VQ table for odd, secondary for even lines */ | ||
466 |
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914444 | if (mode <= 4) |
467 | 842209 | delta_tab = delta[line & 1]; | |
468 | else | ||
469 | 72235 | delta_tab = delta[1]; | |
470 |
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914444 | BUFFER_PRECHECK; |
471 | 914444 | code = bytestream_get_byte(data_ptr); | |
472 |
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914444 | if (code < 248) { |
473 |
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809297 | if (code < delta_tab->num_dyads) { |
474 |
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342912 | BUFFER_PRECHECK; |
475 | 342912 | dyad1 = bytestream_get_byte(data_ptr); | |
476 | 342912 | dyad2 = code; | |
477 |
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342912 | if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248) |
478 | ✗ | return IV3_BAD_DATA; | |
479 | } else { | ||
480 | /* process QUADS */ | ||
481 | 466385 | code -= delta_tab->num_dyads; | |
482 | 466385 | dyad1 = code / delta_tab->quad_exp; | |
483 | 466385 | dyad2 = code % delta_tab->quad_exp; | |
484 |
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466385 | if (swap_quads[line & 1]) |
485 | ✗ | FFSWAP(unsigned int, dyad1, dyad2); | |
486 | } | ||
487 |
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809297 | if (mode <= 4) { |
488 |
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748407 | APPLY_DELTA_4; |
489 |
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60890 | } else if (mode == 10 && !cell->mv_ptr) { |
490 |
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59579 | APPLY_DELTA_8; |
491 | } else { | ||
492 |
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1311 | APPLY_DELTA_1011_INTER; |
493 | } | ||
494 | } else { | ||
495 | /* process RLE codes */ | ||
496 |
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105147 | switch (code) { |
497 | 11658 | case RLE_ESC_FC: | |
498 | 11658 | skip_flag = 0; | |
499 | 11658 | rle_blocks = 1; | |
500 | 11658 | code = 253; | |
501 | /* FALLTHROUGH */ | ||
502 | 88796 | case RLE_ESC_FF: | |
503 | case RLE_ESC_FE: | ||
504 | case RLE_ESC_FD: | ||
505 | 88796 | num_lines = 257 - code - line; | |
506 |
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88796 | if (num_lines <= 0) |
507 | ✗ | return IV3_BAD_RLE; | |
508 |
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88796 | if (mode <= 4) { |
509 | 80567 | RLE_LINES_COPY; | |
510 |
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8229 | } else if (mode == 10 && !cell->mv_ptr) { |
511 |
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7274 | RLE_LINES_COPY_M10; |
512 | } | ||
513 | 88796 | break; | |
514 | 14291 | case RLE_ESC_FB: | |
515 |
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14291 | BUFFER_PRECHECK; |
516 | 14291 | code = bytestream_get_byte(data_ptr); | |
517 | 14291 | rle_blocks = (code & 0x1F) - 1; /* set block counter */ | |
518 |
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14291 | if (code >= 64 || rle_blocks < 0) |
519 | ✗ | return IV3_BAD_COUNTER; | |
520 | 14291 | skip_flag = code & 0x20; | |
521 | 14291 | num_lines = 4 - line; /* enforce next block processing */ | |
522 |
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14291 | if (mode >= 10 || (cell->mv_ptr || !skip_flag)) { |
523 |
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14291 | if (mode <= 4) { |
524 | 11441 | RLE_LINES_COPY; | |
525 |
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2850 | } else if (mode == 10 && !cell->mv_ptr) { |
526 |
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1604 | RLE_LINES_COPY_M10; |
527 | } | ||
528 | } | ||
529 | 14291 | break; | |
530 | 570 | case RLE_ESC_F9: | |
531 | 570 | skip_flag = 1; | |
532 | 570 | rle_blocks = 1; | |
533 | /* FALLTHROUGH */ | ||
534 | 2060 | case RLE_ESC_FA: | |
535 |
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2060 | if (line) |
536 | ✗ | return IV3_BAD_RLE; | |
537 | 2060 | num_lines = 4; /* enforce next block processing */ | |
538 |
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2060 | if (cell->mv_ptr) { |
539 |
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2060 | if (mode <= 4) { |
540 | 1794 | RLE_LINES_COPY; | |
541 |
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266 | } else if (mode == 10 && !cell->mv_ptr) { |
542 | ✗ | RLE_LINES_COPY_M10; | |
543 | } | ||
544 | } | ||
545 | 2060 | break; | |
546 | ✗ | default: | |
547 | ✗ | return IV3_UNSUPPORTED; | |
548 | } | ||
549 | } | ||
550 | |||
551 | 914444 | line += num_lines; | |
552 | 914444 | ref += row_offset * (num_lines << v_zoom); | |
553 | 914444 | dst += row_offset * (num_lines << v_zoom); | |
554 | } | ||
555 | } | ||
556 | |||
557 | /* move to next horizontal block */ | ||
558 | 349555 | block += 4 << h_zoom; | |
559 | 349555 | ref_block += 4 << h_zoom; | |
560 | } | ||
561 | |||
562 | /* move to next line of blocks */ | ||
563 | 77543 | ref_block += blk_row_offset; | |
564 | 77543 | block += blk_row_offset; | |
565 | } | ||
566 | 15944 | return IV3_NOERR; | |
567 | } | ||
568 | |||
569 | |||
570 | /** | ||
571 | * Decode a vector-quantized cell. | ||
572 | * It consists of several routines, each of which handles one or more "modes" | ||
573 | * with which a cell can be encoded. | ||
574 | * | ||
575 | * @param ctx pointer to the decoder context | ||
576 | * @param avctx ptr to the AVCodecContext | ||
577 | * @param plane pointer to the plane descriptor | ||
578 | * @param cell pointer to the cell descriptor | ||
579 | * @param data_ptr pointer to the compressed data | ||
580 | * @param last_ptr pointer to the last byte to catch reads past end of buffer | ||
581 | * @return number of consumed bytes or negative number in case of error | ||
582 | */ | ||
583 | 15944 | static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx, | |
584 | Plane *plane, Cell *cell, const uint8_t *data_ptr, | ||
585 | const uint8_t *last_ptr) | ||
586 | { | ||
587 | int x, mv_x, mv_y, mode, vq_index, prim_indx, second_indx; | ||
588 | int zoom_fac; | ||
589 | 15944 | int offset, error = 0, swap_quads[2]; | |
590 | 15944 | uint8_t code, *block, *ref_block = 0; | |
591 | const vqEntry *delta[2]; | ||
592 | 15944 | const uint8_t *data_start = data_ptr; | |
593 | |||
594 | /* get coding mode and VQ table index from the VQ descriptor byte */ | ||
595 | 15944 | code = *data_ptr++; | |
596 | 15944 | mode = code >> 4; | |
597 | 15944 | vq_index = code & 0xF; | |
598 | |||
599 | /* setup output and reference pointers */ | ||
600 | 15944 | offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2); | |
601 | 15944 | block = plane->pixels[ctx->buf_sel] + offset; | |
602 | |||
603 |
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15944 | if (!cell->mv_ptr) { |
604 | /* use previous line as reference for INTRA cells */ | ||
605 | 12410 | ref_block = block - plane->pitch; | |
606 |
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3534 | } else if (mode >= 10) { |
607 | /* for mode 10 and 11 INTER first copy the predicted cell into the current one */ | ||
608 | /* so we don't need to do data copying for each RLE code later */ | ||
609 | 1227 | int ret = copy_cell(ctx, plane, cell); | |
610 |
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1227 | if (ret < 0) |
611 | ✗ | return ret; | |
612 | } else { | ||
613 | /* set the pointer to the reference pixels for modes 0-4 INTER */ | ||
614 | 2307 | mv_y = cell->mv_ptr[0]; | |
615 | 2307 | mv_x = cell->mv_ptr[1]; | |
616 | |||
617 | /* -1 because there is an extra line on top for prediction */ | ||
618 |
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2307 | if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 || |
619 |
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2307 | ((cell->ypos + cell->height) << 2) + mv_y > plane->height || |
620 |
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2307 | ((cell->xpos + cell->width) << 2) + mv_x > plane->width) { |
621 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
622 | "Motion vectors point out of the frame.\n"); | ||
623 | ✗ | return AVERROR_INVALIDDATA; | |
624 | } | ||
625 | |||
626 | 2307 | offset += mv_y * plane->pitch + mv_x; | |
627 | 2307 | ref_block = plane->pixels[ctx->buf_sel ^ 1] + offset; | |
628 | } | ||
629 | |||
630 | /* select VQ tables as follows: */ | ||
631 | /* modes 0 and 3 use only the primary table for all lines in a block */ | ||
632 | /* while modes 1 and 4 switch between primary and secondary tables on alternate lines */ | ||
633 |
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15944 | if (mode == 1 || mode == 4) { |
634 | ✗ | code = ctx->alt_quant[vq_index]; | |
635 | ✗ | prim_indx = (code >> 4) + ctx->cb_offset; | |
636 | ✗ | second_indx = (code & 0xF) + ctx->cb_offset; | |
637 | } else { | ||
638 | 15944 | vq_index += ctx->cb_offset; | |
639 | 15944 | prim_indx = second_indx = vq_index; | |
640 | } | ||
641 | |||
642 |
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15944 | if (prim_indx >= 24 || second_indx >= 24) { |
643 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid VQ table indexes! Primary: %d, secondary: %d!\n", | |
644 | prim_indx, second_indx); | ||
645 | ✗ | return AVERROR_INVALIDDATA; | |
646 | } | ||
647 | |||
648 | 15944 | delta[0] = &vq_tab[second_indx]; | |
649 | 15944 | delta[1] = &vq_tab[prim_indx]; | |
650 | 15944 | swap_quads[0] = second_indx >= 16; | |
651 | 15944 | swap_quads[1] = prim_indx >= 16; | |
652 | |||
653 | /* requantize the prediction if VQ index of this cell differs from VQ index */ | ||
654 | /* of the predicted cell in order to avoid overflows. */ | ||
655 |
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15944 | if (vq_index >= 8 && ref_block) { |
656 |
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263506 | for (x = 0; x < cell->width << 2; x++) |
657 | 251096 | ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127]; | |
658 | } | ||
659 | |||
660 | 15944 | error = IV3_NOERR; | |
661 | |||
662 |
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15944 | switch (mode) { |
663 | 10783 | case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/ | |
664 | case 1: | ||
665 | case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/ | ||
666 | case 4: | ||
667 |
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10783 | if (mode >= 3 && cell->mv_ptr) { |
668 | ✗ | av_log(avctx, AV_LOG_ERROR, "Attempt to apply Mode 3/4 to an INTER cell!\n"); | |
669 | ✗ | return AVERROR_INVALIDDATA; | |
670 | } | ||
671 | |||
672 | 10783 | zoom_fac = mode >= 3; | |
673 | 10783 | error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch, | |
674 | 0, zoom_fac, mode, delta, swap_quads, | ||
675 | &data_ptr, last_ptr); | ||
676 | 10783 | break; | |
677 | 5161 | case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/ | |
678 | case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/ | ||
679 |
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5161 | if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */ |
680 | 3934 | error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch, | |
681 | 1, 1, mode, delta, swap_quads, | ||
682 | &data_ptr, last_ptr); | ||
683 | } else { /* mode 10 and 11 INTER processing */ | ||
684 |
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1227 | if (mode == 11 && !cell->mv_ptr) { |
685 | ✗ | av_log(avctx, AV_LOG_ERROR, "Attempt to use Mode 11 for an INTRA cell!\n"); | |
686 | ✗ | return AVERROR_INVALIDDATA; | |
687 | } | ||
688 | |||
689 | 1227 | zoom_fac = mode == 10; | |
690 | 1227 | error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch, | |
691 | zoom_fac, 1, mode, delta, swap_quads, | ||
692 | &data_ptr, last_ptr); | ||
693 | } | ||
694 | 5161 | break; | |
695 | ✗ | default: | |
696 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported coding mode: %d\n", mode); | |
697 | ✗ | return AVERROR_INVALIDDATA; | |
698 | }//switch mode | ||
699 | |||
700 |
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15944 | switch (error) { |
701 | ✗ | case IV3_BAD_RLE: | |
702 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE code %X is not allowed at the current line\n", | |
703 | ✗ | mode, data_ptr[-1]); | |
704 | ✗ | return AVERROR_INVALIDDATA; | |
705 | ✗ | case IV3_BAD_DATA: | |
706 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mode %d: invalid VQ data\n", mode); | |
707 | ✗ | return AVERROR_INVALIDDATA; | |
708 | ✗ | case IV3_BAD_COUNTER: | |
709 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE-FB invalid counter: %d\n", mode, code); | |
710 | ✗ | return AVERROR_INVALIDDATA; | |
711 | ✗ | case IV3_UNSUPPORTED: | |
712 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mode %d: unsupported RLE code: %X\n", mode, data_ptr[-1]); | |
713 | ✗ | return AVERROR_INVALIDDATA; | |
714 | ✗ | case IV3_OUT_OF_DATA: | |
715 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mode %d: attempt to read past end of buffer\n", mode); | |
716 | ✗ | return AVERROR_INVALIDDATA; | |
717 | } | ||
718 | |||
719 | 15944 | return data_ptr - data_start; /* report number of bytes consumed from the input buffer */ | |
720 | } | ||
721 | |||
722 | |||
723 | /* Binary tree codes. */ | ||
724 | enum { | ||
725 | H_SPLIT = 0, | ||
726 | V_SPLIT = 1, | ||
727 | INTRA_NULL = 2, | ||
728 | INTER_DATA = 3 | ||
729 | }; | ||
730 | |||
731 | |||
732 | #define SPLIT_CELL(size, new_size) (new_size) = ((size) > 2) ? ((((size) + 2) >> 2) << 1) : 1 | ||
733 | |||
734 | #define UPDATE_BITPOS(n) \ | ||
735 | ctx->skip_bits += (n); \ | ||
736 | ctx->need_resync = 1 | ||
737 | |||
738 | #define RESYNC_BITSTREAM \ | ||
739 | if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \ | ||
740 | skip_bits_long(&ctx->gb, ctx->skip_bits); \ | ||
741 | ctx->skip_bits = 0; \ | ||
742 | ctx->need_resync = 0; \ | ||
743 | } | ||
744 | |||
745 | #define CHECK_CELL \ | ||
746 | if (curr_cell.xpos + curr_cell.width > (plane->width >> 2) || \ | ||
747 | curr_cell.ypos + curr_cell.height > (plane->height >> 2)) { \ | ||
748 | av_log(avctx, AV_LOG_ERROR, "Invalid cell: x=%d, y=%d, w=%d, h=%d\n", \ | ||
749 | curr_cell.xpos, curr_cell.ypos, curr_cell.width, curr_cell.height); \ | ||
750 | return AVERROR_INVALIDDATA; \ | ||
751 | } | ||
752 | |||
753 | |||
754 | 16400 | static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx, | |
755 | Plane *plane, int code, Cell *ref_cell, | ||
756 | const int depth, const int strip_width) | ||
757 | { | ||
758 | Cell curr_cell; | ||
759 | int bytes_used, ret; | ||
760 | |||
761 |
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16400 | if (depth <= 0) { |
762 | ✗ | av_log(avctx, AV_LOG_ERROR, "Stack overflow (corrupted binary tree)!\n"); | |
763 | ✗ | return AVERROR_INVALIDDATA; // unwind recursion | |
764 | } | ||
765 | |||
766 | 16400 | curr_cell = *ref_cell; // clone parent cell | |
767 |
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16400 | if (code == H_SPLIT) { |
768 |
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5560 | SPLIT_CELL(ref_cell->height, curr_cell.height); |
769 | 5560 | ref_cell->ypos += curr_cell.height; | |
770 | 5560 | ref_cell->height -= curr_cell.height; | |
771 |
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5560 | if (ref_cell->height <= 0 || curr_cell.height <= 0) |
772 | ✗ | return AVERROR_INVALIDDATA; | |
773 |
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10840 | } else if (code == V_SPLIT) { |
774 |
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10420 | if (curr_cell.width > strip_width) { |
775 | /* split strip */ | ||
776 |
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300 | curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width; |
777 | } else | ||
778 |
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10120 | SPLIT_CELL(ref_cell->width, curr_cell.width); |
779 | 10420 | ref_cell->xpos += curr_cell.width; | |
780 | 10420 | ref_cell->width -= curr_cell.width; | |
781 |
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10420 | if (ref_cell->width <= 0 || curr_cell.width <= 0) |
782 | ✗ | return AVERROR_INVALIDDATA; | |
783 | } | ||
784 | |||
785 |
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37989 | while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */ |
786 |
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37989 | RESYNC_BITSTREAM; |
787 |
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37989 | switch (code = get_bits(&ctx->gb, 2)) { |
788 | 15980 | case H_SPLIT: | |
789 | case V_SPLIT: | ||
790 |
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15980 | if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width)) |
791 | ✗ | return AVERROR_INVALIDDATA; | |
792 | 15980 | break; | |
793 | 2829 | case INTRA_NULL: | |
794 |
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2829 | if (!curr_cell.tree) { /* MC tree INTRA code */ |
795 | 2373 | curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */ | |
796 | 2373 | curr_cell.tree = 1; /* enter the VQ tree */ | |
797 | } else { /* VQ tree NULL code */ | ||
798 |
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456 | RESYNC_BITSTREAM; |
799 | 456 | code = get_bits(&ctx->gb, 2); | |
800 |
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456 | if (code >= 2) { |
801 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code); | |
802 | ✗ | return AVERROR_INVALIDDATA; | |
803 | } | ||
804 |
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456 | if (code == 1) |
805 | ✗ | av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n"); | |
806 | |||
807 |
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456 | CHECK_CELL |
808 |
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456 | if (!curr_cell.mv_ptr) |
809 | ✗ | return AVERROR_INVALIDDATA; | |
810 | |||
811 | 456 | ret = copy_cell(ctx, plane, &curr_cell); | |
812 | 456 | return ret; | |
813 | } | ||
814 | 2373 | break; | |
815 | 19180 | case INTER_DATA: | |
816 |
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19180 | if (!curr_cell.tree) { /* MC tree INTER code */ |
817 | unsigned mv_idx; | ||
818 | /* get motion vector index and setup the pointer to the mv set */ | ||
819 |
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3236 | if (!ctx->need_resync) |
820 | 1544 | ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3]; | |
821 |
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3236 | if (ctx->next_cell_data >= ctx->last_byte) { |
822 | ✗ | av_log(avctx, AV_LOG_ERROR, "motion vector out of array\n"); | |
823 | ✗ | return AVERROR_INVALIDDATA; | |
824 | } | ||
825 | 3236 | mv_idx = *(ctx->next_cell_data++); | |
826 |
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3236 | if (mv_idx >= ctx->num_vectors) { |
827 | ✗ | av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n"); | |
828 | ✗ | return AVERROR_INVALIDDATA; | |
829 | } | ||
830 | 3236 | curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1]; | |
831 | 3236 | curr_cell.tree = 1; /* enter the VQ tree */ | |
832 | 3236 | UPDATE_BITPOS(8); | |
833 | } else { /* VQ tree DATA code */ | ||
834 |
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15944 | if (!ctx->need_resync) |
835 | 7503 | ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3]; | |
836 | |||
837 |
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15944 | CHECK_CELL |
838 | 15944 | bytes_used = decode_cell(ctx, avctx, plane, &curr_cell, | |
839 | ctx->next_cell_data, ctx->last_byte); | ||
840 |
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15944 | if (bytes_used < 0) |
841 | ✗ | return AVERROR_INVALIDDATA; | |
842 | |||
843 | 15944 | UPDATE_BITPOS(bytes_used << 3); | |
844 | 15944 | ctx->next_cell_data += bytes_used; | |
845 | 15944 | return 0; | |
846 | } | ||
847 | 3236 | break; | |
848 | } | ||
849 | }//while | ||
850 | |||
851 | ✗ | return AVERROR_INVALIDDATA; | |
852 | } | ||
853 | |||
854 | |||
855 | 420 | static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx, | |
856 | Plane *plane, const uint8_t *data, int32_t data_size, | ||
857 | int32_t strip_width) | ||
858 | { | ||
859 | Cell curr_cell; | ||
860 | unsigned num_vectors; | ||
861 | |||
862 | /* each plane data starts with mc_vector_count field, */ | ||
863 | /* an optional array of motion vectors followed by the vq data */ | ||
864 | 420 | num_vectors = bytestream_get_le32(&data); data_size -= 4; | |
865 |
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420 | if (num_vectors > 256) { |
866 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
867 | "Read invalid number of motion vectors %d\n", num_vectors); | ||
868 | ✗ | return AVERROR_INVALIDDATA; | |
869 | } | ||
870 |
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420 | if (num_vectors * 2 > data_size) |
871 | ✗ | return AVERROR_INVALIDDATA; | |
872 | |||
873 | 420 | ctx->num_vectors = num_vectors; | |
874 |
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420 | ctx->mc_vectors = num_vectors ? data : 0; |
875 | |||
876 | /* init the bitreader */ | ||
877 | 420 | init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3); | |
878 | 420 | ctx->skip_bits = 0; | |
879 | 420 | ctx->need_resync = 0; | |
880 | |||
881 | 420 | ctx->last_byte = data + data_size; | |
882 | |||
883 | /* initialize the 1st cell and set its dimensions to whole plane */ | ||
884 | 420 | curr_cell.xpos = curr_cell.ypos = 0; | |
885 | 420 | curr_cell.width = plane->width >> 2; | |
886 | 420 | curr_cell.height = plane->height >> 2; | |
887 | 420 | curr_cell.tree = 0; // we are in the MC tree now | |
888 | 420 | curr_cell.mv_ptr = 0; // no motion vector = INTRA cell | |
889 | |||
890 | 420 | return parse_bintree(ctx, avctx, plane, INTRA_NULL, &curr_cell, CELL_STACK_MAX, strip_width); | |
891 | } | ||
892 | |||
893 | |||
894 | #define OS_HDR_ID MKBETAG('F', 'R', 'M', 'H') | ||
895 | |||
896 | 140 | static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx, | |
897 | const uint8_t *buf, int buf_size) | ||
898 | { | ||
899 | GetByteContext gb; | ||
900 | const uint8_t *bs_hdr; | ||
901 | uint32_t frame_num, word2, check_sum, data_size; | ||
902 | int y_offset, u_offset, v_offset; | ||
903 | uint32_t starts[3], ends[3]; | ||
904 | uint16_t height, width; | ||
905 | int i, j; | ||
906 | |||
907 | 140 | bytestream2_init(&gb, buf, buf_size); | |
908 | |||
909 | /* parse and check the OS header */ | ||
910 | 140 | frame_num = bytestream2_get_le32(&gb); | |
911 | 140 | word2 = bytestream2_get_le32(&gb); | |
912 | 140 | check_sum = bytestream2_get_le32(&gb); | |
913 | 140 | data_size = bytestream2_get_le32(&gb); | |
914 | |||
915 |
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140 | if ((frame_num ^ word2 ^ data_size ^ OS_HDR_ID) != check_sum) { |
916 | ✗ | av_log(avctx, AV_LOG_ERROR, "OS header checksum mismatch!\n"); | |
917 | ✗ | return AVERROR_INVALIDDATA; | |
918 | } | ||
919 | |||
920 | /* parse the bitstream header */ | ||
921 | 140 | bs_hdr = gb.buffer; | |
922 | |||
923 |
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140 | if (bytestream2_get_le16(&gb) != 32) { |
924 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n"); | |
925 | ✗ | return AVERROR_INVALIDDATA; | |
926 | } | ||
927 | |||
928 | 140 | ctx->frame_num = frame_num; | |
929 | 140 | ctx->frame_flags = bytestream2_get_le16(&gb); | |
930 | 140 | ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3; | |
931 | 140 | ctx->cb_offset = bytestream2_get_byte(&gb); | |
932 | |||
933 |
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140 | if (ctx->data_size == 16) |
934 | ✗ | return 4; | |
935 |
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140 | ctx->data_size = FFMIN(ctx->data_size, buf_size - 16); |
936 | |||
937 | 140 | bytestream2_skip(&gb, 3); // skip reserved byte and checksum | |
938 | |||
939 | /* check frame dimensions */ | ||
940 | 140 | height = bytestream2_get_le16(&gb); | |
941 | 140 | width = bytestream2_get_le16(&gb); | |
942 |
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140 | if (av_image_check_size(width, height, 0, avctx)) |
943 | ✗ | return AVERROR_INVALIDDATA; | |
944 | |||
945 |
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140 | if (width != ctx->width || height != ctx->height) { |
946 | int res; | ||
947 | |||
948 | ff_dlog(avctx, "Frame dimensions changed!\n"); | ||
949 | |||
950 | ✗ | if (width < 16 || width > 640 || | |
951 | ✗ | height < 16 || height > 480 || | |
952 | ✗ | width & 3 || height & 3) { | |
953 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
954 | "Invalid picture dimensions: %d x %d!\n", width, height); | ||
955 | ✗ | return AVERROR_INVALIDDATA; | |
956 | } | ||
957 | ✗ | free_frame_buffers(ctx); | |
958 | ✗ | if ((res = allocate_frame_buffers(ctx, avctx, width, height)) < 0) | |
959 | ✗ | return res; | |
960 | ✗ | if ((res = ff_set_dimensions(avctx, width, height)) < 0) | |
961 | ✗ | return res; | |
962 | } | ||
963 | |||
964 | 140 | y_offset = bytestream2_get_le32(&gb); | |
965 | 140 | v_offset = bytestream2_get_le32(&gb); | |
966 | 140 | u_offset = bytestream2_get_le32(&gb); | |
967 | 140 | bytestream2_skip(&gb, 4); | |
968 | |||
969 | /* unfortunately there is no common order of planes in the buffer */ | ||
970 | /* so we use that sorting algo for determining planes data sizes */ | ||
971 | 140 | starts[0] = y_offset; | |
972 | 140 | starts[1] = v_offset; | |
973 | 140 | starts[2] = u_offset; | |
974 | |||
975 |
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560 | for (j = 0; j < 3; j++) { |
976 | 420 | ends[j] = ctx->data_size; | |
977 |
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1680 | for (i = 2; i >= 0; i--) |
978 |
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1260 | if (starts[i] < ends[j] && starts[i] > starts[j]) |
979 | 280 | ends[j] = starts[i]; | |
980 | } | ||
981 | |||
982 | 140 | ctx->y_data_size = ends[0] - starts[0]; | |
983 | 140 | ctx->v_data_size = ends[1] - starts[1]; | |
984 | 140 | ctx->u_data_size = ends[2] - starts[2]; | |
985 |
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140 | if (FFMIN3(y_offset, v_offset, u_offset) < 0 || |
986 |
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140 | FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 || |
987 |
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140 | FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 || |
988 |
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140 | FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) { |
989 | ✗ | av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n"); | |
990 | ✗ | return AVERROR_INVALIDDATA; | |
991 | } | ||
992 | |||
993 | 140 | ctx->y_data_ptr = bs_hdr + y_offset; | |
994 | 140 | ctx->v_data_ptr = bs_hdr + v_offset; | |
995 | 140 | ctx->u_data_ptr = bs_hdr + u_offset; | |
996 | 140 | ctx->alt_quant = gb.buffer; | |
997 | |||
998 |
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140 | if (ctx->data_size == 16) { |
999 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n"); | |
1000 | ✗ | return 16; | |
1001 | } | ||
1002 | |||
1003 |
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140 | if (ctx->frame_flags & BS_8BIT_PEL) { |
1004 | ✗ | avpriv_request_sample(avctx, "8-bit pixel format"); | |
1005 | ✗ | return AVERROR_PATCHWELCOME; | |
1006 | } | ||
1007 | |||
1008 |
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140 | if (ctx->frame_flags & BS_MV_X_HALF || ctx->frame_flags & BS_MV_Y_HALF) { |
1009 | ✗ | avpriv_request_sample(avctx, "Halfpel motion vectors"); | |
1010 | ✗ | return AVERROR_PATCHWELCOME; | |
1011 | } | ||
1012 | |||
1013 | 140 | return 0; | |
1014 | } | ||
1015 | |||
1016 | |||
1017 | /** | ||
1018 | * Convert and output the current plane. | ||
1019 | * All pixel values will be upsampled by shifting right by one bit. | ||
1020 | * | ||
1021 | * @param[in] plane pointer to the descriptor of the plane being processed | ||
1022 | * @param[in] buf_sel indicates which frame buffer the input data stored in | ||
1023 | * @param[out] dst pointer to the buffer receiving converted pixels | ||
1024 | * @param[in] dst_pitch pitch for moving to the next y line | ||
1025 | * @param[in] dst_height output plane height | ||
1026 | */ | ||
1027 | 420 | static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, | |
1028 | ptrdiff_t dst_pitch, int dst_height) | ||
1029 | { | ||
1030 | int x,y; | ||
1031 | 420 | const uint8_t *src = plane->pixels[buf_sel]; | |
1032 | 420 | ptrdiff_t pitch = plane->pitch; | |
1033 | |||
1034 | 420 | dst_height = FFMIN(dst_height, plane->height); | |
1035 |
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35820 | for (y = 0; y < dst_height; y++) { |
1036 | /* convert four pixels at once using SWAR */ | ||
1037 |
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1943400 | for (x = 0; x < plane->width >> 2; x++) { |
1038 | 1908000 | AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1); | |
1039 | 1908000 | src += 4; | |
1040 | 1908000 | dst += 4; | |
1041 | } | ||
1042 | |||
1043 |
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35400 | for (x <<= 2; x < plane->width; x++) |
1044 | ✗ | *dst++ = *src++ << 1; | |
1045 | |||
1046 | 35400 | src += pitch - plane->width; | |
1047 | 35400 | dst += dst_pitch - plane->width; | |
1048 | } | ||
1049 | 420 | } | |
1050 | |||
1051 | |||
1052 | 4 | static av_cold int decode_init(AVCodecContext *avctx) | |
1053 | { | ||
1054 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
1055 | 4 | Indeo3DecodeContext *ctx = avctx->priv_data; | |
1056 | |||
1057 | 4 | ctx->avctx = avctx; | |
1058 | 4 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; | |
1059 | |||
1060 | 4 | ff_thread_once(&init_static_once, build_requant_tab); | |
1061 | |||
1062 | 4 | ff_hpeldsp_init(&ctx->hdsp, avctx->flags); | |
1063 | |||
1064 | 4 | return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height); | |
1065 | } | ||
1066 | |||
1067 | |||
1068 | 140 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
1069 | int *got_frame, AVPacket *avpkt) | ||
1070 | { | ||
1071 | 140 | Indeo3DecodeContext *ctx = avctx->priv_data; | |
1072 | 140 | const uint8_t *buf = avpkt->data; | |
1073 | 140 | int buf_size = avpkt->size; | |
1074 | int res; | ||
1075 | |||
1076 | 140 | res = decode_frame_headers(ctx, avctx, buf, buf_size); | |
1077 |
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140 | if (res < 0) |
1078 | ✗ | return res; | |
1079 | |||
1080 | /* skip sync(null) frames */ | ||
1081 |
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140 | if (res) { |
1082 | // we have processed 16 bytes but no data was decoded | ||
1083 | ✗ | *got_frame = 0; | |
1084 | ✗ | return buf_size; | |
1085 | } | ||
1086 | |||
1087 | /* skip droppable INTER frames if requested */ | ||
1088 |
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140 | if (ctx->frame_flags & BS_NONREF && |
1089 |
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32 | (avctx->skip_frame >= AVDISCARD_NONREF)) |
1090 | ✗ | return 0; | |
1091 | |||
1092 | /* skip INTER frames if requested */ | ||
1093 |
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140 | if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY) |
1094 | ✗ | return 0; | |
1095 | |||
1096 | /* use BS_BUFFER flag for buffer switching */ | ||
1097 | 140 | ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1; | |
1098 | |||
1099 |
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140 | if ((res = ff_get_buffer(avctx, frame, 0)) < 0) |
1100 | ✗ | return res; | |
1101 | |||
1102 | /* decode luma plane */ | ||
1103 |
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140 | if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40))) |
1104 | ✗ | return res; | |
1105 | |||
1106 | /* decode chroma planes */ | ||
1107 |
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140 | if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10))) |
1108 | ✗ | return res; | |
1109 | |||
1110 |
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140 | if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10))) |
1111 | ✗ | return res; | |
1112 | |||
1113 | 140 | output_plane(&ctx->planes[0], ctx->buf_sel, | |
1114 | 140 | frame->data[0], frame->linesize[0], | |
1115 | avctx->height); | ||
1116 | 140 | output_plane(&ctx->planes[1], ctx->buf_sel, | |
1117 | 140 | frame->data[1], frame->linesize[1], | |
1118 | 140 | (avctx->height + 3) >> 2); | |
1119 | 140 | output_plane(&ctx->planes[2], ctx->buf_sel, | |
1120 | 140 | frame->data[2], frame->linesize[2], | |
1121 | 140 | (avctx->height + 3) >> 2); | |
1122 | |||
1123 | 140 | *got_frame = 1; | |
1124 | |||
1125 | 140 | return buf_size; | |
1126 | } | ||
1127 | |||
1128 | |||
1129 | 4 | static av_cold int decode_close(AVCodecContext *avctx) | |
1130 | { | ||
1131 | 4 | free_frame_buffers(avctx->priv_data); | |
1132 | |||
1133 | 4 | return 0; | |
1134 | } | ||
1135 | |||
1136 | const FFCodec ff_indeo3_decoder = { | ||
1137 | .p.name = "indeo3", | ||
1138 | .p.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"), | ||
1139 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
1140 | .p.id = AV_CODEC_ID_INDEO3, | ||
1141 | .priv_data_size = sizeof(Indeo3DecodeContext), | ||
1142 | .init = decode_init, | ||
1143 | .close = decode_close, | ||
1144 | FF_CODEC_DECODE_CB(decode_frame), | ||
1145 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
1146 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, | ||
1147 | }; | ||
1148 |