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2ba45a60 DM |
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 "avcodec.h" | |
35 | #include "copy_block.h" | |
36 | #include "bytestream.h" | |
37 | #include "get_bits.h" | |
38 | #include "hpeldsp.h" | |
39 | #include "internal.h" | |
40 | ||
41 | #include "indeo3data.h" | |
42 | ||
43 | /* RLE opcodes. */ | |
44 | enum { | |
45 | RLE_ESC_F9 = 249, ///< same as RLE_ESC_FA + do the same with next block | |
46 | RLE_ESC_FA = 250, ///< INTRA: skip block, INTER: copy data from reference | |
47 | RLE_ESC_FB = 251, ///< apply null delta to N blocks / skip N blocks | |
48 | RLE_ESC_FC = 252, ///< same as RLE_ESC_FD + do the same with next block | |
49 | RLE_ESC_FD = 253, ///< apply null delta to all remaining lines of this block | |
50 | RLE_ESC_FE = 254, ///< apply null delta to all lines up to the 3rd line | |
51 | RLE_ESC_FF = 255 ///< apply null delta to all lines up to the 2nd line | |
52 | }; | |
53 | ||
54 | ||
55 | /* Some constants for parsing frame bitstream flags. */ | |
56 | #define BS_8BIT_PEL (1 << 1) ///< 8bit pixel bitdepth indicator | |
57 | #define BS_KEYFRAME (1 << 2) ///< intra frame indicator | |
58 | #define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator | |
59 | #define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator | |
60 | #define BS_NONREF (1 << 8) ///< nonref (discardable) frame indicator | |
61 | #define BS_BUFFER 9 ///< indicates which of two frame buffers should be used | |
62 | ||
63 | ||
64 | typedef struct Plane { | |
65 | uint8_t *buffers[2]; | |
66 | uint8_t *pixels[2]; ///< pointer to the actual pixel data of the buffers above | |
67 | uint32_t width; | |
68 | uint32_t height; | |
69 | uint32_t pitch; | |
70 | } Plane; | |
71 | ||
72 | #define CELL_STACK_MAX 20 | |
73 | ||
74 | typedef struct Cell { | |
75 | int16_t xpos; ///< cell coordinates in 4x4 blocks | |
76 | int16_t ypos; | |
77 | int16_t width; ///< cell width in 4x4 blocks | |
78 | int16_t height; ///< cell height in 4x4 blocks | |
79 | uint8_t tree; ///< tree id: 0- MC tree, 1 - VQ tree | |
80 | const int8_t *mv_ptr; ///< ptr to the motion vector if any | |
81 | } Cell; | |
82 | ||
83 | typedef struct Indeo3DecodeContext { | |
84 | AVCodecContext *avctx; | |
85 | HpelDSPContext hdsp; | |
86 | ||
87 | GetBitContext gb; | |
88 | int need_resync; | |
89 | int skip_bits; | |
90 | const uint8_t *next_cell_data; | |
91 | const uint8_t *last_byte; | |
92 | const int8_t *mc_vectors; | |
93 | unsigned num_vectors; ///< number of motion vectors in mc_vectors | |
94 | ||
95 | int16_t width, height; | |
96 | uint32_t frame_num; ///< current frame number (zero-based) | |
092a9121 | 97 | int data_size; ///< size of the frame data in bytes |
2ba45a60 DM |
98 | uint16_t frame_flags; ///< frame properties |
99 | uint8_t cb_offset; ///< needed for selecting VQ tables | |
100 | uint8_t buf_sel; ///< active frame buffer: 0 - primary, 1 -secondary | |
101 | const uint8_t *y_data_ptr; | |
102 | const uint8_t *v_data_ptr; | |
103 | const uint8_t *u_data_ptr; | |
104 | int32_t y_data_size; | |
105 | int32_t v_data_size; | |
106 | int32_t u_data_size; | |
107 | const uint8_t *alt_quant; ///< secondary VQ table set for the modes 1 and 4 | |
108 | Plane planes[3]; | |
109 | } Indeo3DecodeContext; | |
110 | ||
111 | ||
112 | static uint8_t requant_tab[8][128]; | |
113 | ||
114 | /* | |
115 | * Build the static requantization table. | |
116 | * This table is used to remap pixel values according to a specific | |
117 | * quant index and thus avoid overflows while adding deltas. | |
118 | */ | |
119 | static av_cold void build_requant_tab(void) | |
120 | { | |
121 | static const int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 }; | |
122 | static const int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 }; | |
123 | ||
124 | int i, j, step; | |
125 | ||
126 | for (i = 0; i < 8; i++) { | |
127 | step = i + 2; | |
128 | for (j = 0; j < 128; j++) | |
129 | requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i]; | |
130 | } | |
131 | ||
132 | /* some last elements calculated above will have values >= 128 */ | |
133 | /* pixel values shall never exceed 127 so set them to non-overflowing values */ | |
134 | /* according with the quantization step of the respective section */ | |
135 | requant_tab[0][127] = 126; | |
136 | requant_tab[1][119] = 118; | |
137 | requant_tab[1][120] = 118; | |
138 | requant_tab[2][126] = 124; | |
139 | requant_tab[2][127] = 124; | |
140 | requant_tab[6][124] = 120; | |
141 | requant_tab[6][125] = 120; | |
142 | requant_tab[6][126] = 120; | |
143 | requant_tab[6][127] = 120; | |
144 | ||
145 | /* Patch for compatibility with the Intel's binary decoders */ | |
146 | requant_tab[1][7] = 10; | |
147 | requant_tab[4][8] = 10; | |
148 | } | |
149 | ||
150 | ||
151 | static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx) | |
152 | { | |
153 | int p; | |
154 | ||
155 | ctx->width = ctx->height = 0; | |
156 | ||
157 | for (p = 0; p < 3; p++) { | |
158 | av_freep(&ctx->planes[p].buffers[0]); | |
159 | av_freep(&ctx->planes[p].buffers[1]); | |
160 | ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0; | |
161 | } | |
162 | } | |
163 | ||
164 | ||
165 | static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx, | |
166 | AVCodecContext *avctx, int luma_width, int luma_height) | |
167 | { | |
168 | int p, chroma_width, chroma_height; | |
169 | int luma_pitch, chroma_pitch, luma_size, chroma_size; | |
170 | ||
171 | if (luma_width < 16 || luma_width > 640 || | |
172 | luma_height < 16 || luma_height > 480 || | |
173 | luma_width & 3 || luma_height & 3) { | |
174 | av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n", | |
175 | luma_width, luma_height); | |
176 | return AVERROR_INVALIDDATA; | |
177 | } | |
178 | ||
179 | ctx->width = luma_width ; | |
180 | ctx->height = luma_height; | |
181 | ||
182 | chroma_width = FFALIGN(luma_width >> 2, 4); | |
183 | chroma_height = FFALIGN(luma_height >> 2, 4); | |
184 | ||
185 | luma_pitch = FFALIGN(luma_width, 16); | |
186 | chroma_pitch = FFALIGN(chroma_width, 16); | |
187 | ||
188 | /* Calculate size of the luminance plane. */ | |
189 | /* Add one line more for INTRA prediction. */ | |
190 | luma_size = luma_pitch * (luma_height + 1); | |
191 | ||
192 | /* Calculate size of a chrominance planes. */ | |
193 | /* Add one line more for INTRA prediction. */ | |
194 | chroma_size = chroma_pitch * (chroma_height + 1); | |
195 | ||
196 | /* allocate frame buffers */ | |
197 | for (p = 0; p < 3; p++) { | |
198 | ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch; | |
199 | ctx->planes[p].width = !p ? luma_width : chroma_width; | |
200 | ctx->planes[p].height = !p ? luma_height : chroma_height; | |
201 | ||
202 | ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size); | |
203 | ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size); | |
204 | ||
205 | if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1]) { | |
206 | free_frame_buffers(ctx); | |
207 | return AVERROR(ENOMEM); | |
208 | } | |
209 | ||
210 | /* fill the INTRA prediction lines with the middle pixel value = 64 */ | |
211 | memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch); | |
212 | memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch); | |
213 | ||
214 | /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */ | |
215 | ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch; | |
216 | ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch; | |
217 | memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height); | |
218 | memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height); | |
219 | } | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | /** | |
225 | * Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into | |
226 | * the cell(x, y) in the current frame. | |
227 | * | |
228 | * @param ctx pointer to the decoder context | |
229 | * @param plane pointer to the plane descriptor | |
230 | * @param cell pointer to the cell descriptor | |
231 | */ | |
232 | static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell) | |
233 | { | |
234 | int h, w, mv_x, mv_y, offset, offset_dst; | |
235 | uint8_t *src, *dst; | |
236 | ||
237 | /* setup output and reference pointers */ | |
238 | offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2); | |
239 | dst = plane->pixels[ctx->buf_sel] + offset_dst; | |
240 | if(cell->mv_ptr){ | |
241 | mv_y = cell->mv_ptr[0]; | |
242 | mv_x = cell->mv_ptr[1]; | |
243 | }else | |
244 | mv_x= mv_y= 0; | |
245 | ||
246 | /* -1 because there is an extra line on top for prediction */ | |
247 | if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 || | |
248 | ((cell->ypos + cell->height) << 2) + mv_y > plane->height || | |
249 | ((cell->xpos + cell->width) << 2) + mv_x > plane->width) { | |
250 | av_log(ctx->avctx, AV_LOG_ERROR, | |
251 | "Motion vectors point out of the frame.\n"); | |
252 | return AVERROR_INVALIDDATA; | |
253 | } | |
254 | ||
255 | offset = offset_dst + mv_y * plane->pitch + mv_x; | |
256 | src = plane->pixels[ctx->buf_sel ^ 1] + offset; | |
257 | ||
258 | h = cell->height << 2; | |
259 | ||
260 | for (w = cell->width; w > 0;) { | |
261 | /* copy using 16xH blocks */ | |
262 | if (!((cell->xpos << 2) & 15) && w >= 4) { | |
263 | for (; w >= 4; src += 16, dst += 16, w -= 4) | |
264 | ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h); | |
265 | } | |
266 | ||
267 | /* copy using 8xH blocks */ | |
268 | if (!((cell->xpos << 2) & 7) && w >= 2) { | |
269 | ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h); | |
270 | w -= 2; | |
271 | src += 8; | |
272 | dst += 8; | |
273 | } else if (w >= 1) { | |
274 | ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h); | |
275 | w--; | |
276 | src += 4; | |
277 | dst += 4; | |
278 | } | |
279 | } | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | ||
285 | /* Average 4/8 pixels at once without rounding using SWAR */ | |
286 | #define AVG_32(dst, src, ref) \ | |
287 | AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL) | |
288 | ||
289 | #define AVG_64(dst, src, ref) \ | |
290 | AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL) | |
291 | ||
292 | ||
293 | /* | |
294 | * Replicate each even pixel as follows: | |
295 | * ABCDEFGH -> AACCEEGG | |
296 | */ | |
297 | static inline uint64_t replicate64(uint64_t a) { | |
298 | #if HAVE_BIGENDIAN | |
299 | a &= 0xFF00FF00FF00FF00ULL; | |
300 | a |= a >> 8; | |
301 | #else | |
302 | a &= 0x00FF00FF00FF00FFULL; | |
303 | a |= a << 8; | |
304 | #endif | |
305 | return a; | |
306 | } | |
307 | ||
308 | static inline uint32_t replicate32(uint32_t a) { | |
309 | #if HAVE_BIGENDIAN | |
310 | a &= 0xFF00FF00UL; | |
311 | a |= a >> 8; | |
312 | #else | |
313 | a &= 0x00FF00FFUL; | |
314 | a |= a << 8; | |
315 | #endif | |
316 | return a; | |
317 | } | |
318 | ||
319 | ||
320 | /* Fill n lines with 64bit pixel value pix */ | |
321 | static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n, | |
322 | int32_t row_offset) | |
323 | { | |
324 | for (; n > 0; dst += row_offset, n--) | |
325 | AV_WN64A(dst, pix); | |
326 | } | |
327 | ||
328 | ||
329 | /* Error codes for cell decoding. */ | |
330 | enum { | |
331 | IV3_NOERR = 0, | |
332 | IV3_BAD_RLE = 1, | |
333 | IV3_BAD_DATA = 2, | |
334 | IV3_BAD_COUNTER = 3, | |
335 | IV3_UNSUPPORTED = 4, | |
336 | IV3_OUT_OF_DATA = 5 | |
337 | }; | |
338 | ||
339 | ||
340 | #define BUFFER_PRECHECK \ | |
341 | if (*data_ptr >= last_ptr) \ | |
342 | return IV3_OUT_OF_DATA; \ | |
343 | ||
344 | #define RLE_BLOCK_COPY \ | |
345 | if (cell->mv_ptr || !skip_flag) \ | |
346 | copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom) | |
347 | ||
348 | #define RLE_BLOCK_COPY_8 \ | |
349 | pix64 = AV_RN64(ref);\ | |
350 | if (is_first_row) {/* special prediction case: top line of a cell */\ | |
351 | pix64 = replicate64(pix64);\ | |
352 | fill_64(dst + row_offset, pix64, 7, row_offset);\ | |
353 | AVG_64(dst, ref, dst + row_offset);\ | |
354 | } else \ | |
355 | fill_64(dst, pix64, 8, row_offset) | |
356 | ||
357 | #define RLE_LINES_COPY \ | |
358 | copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom) | |
359 | ||
360 | #define RLE_LINES_COPY_M10 \ | |
361 | pix64 = AV_RN64(ref);\ | |
362 | if (is_top_of_cell) {\ | |
363 | pix64 = replicate64(pix64);\ | |
364 | fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\ | |
365 | AVG_64(dst, ref, dst + row_offset);\ | |
366 | } else \ | |
367 | fill_64(dst, pix64, num_lines << 1, row_offset) | |
368 | ||
369 | #define APPLY_DELTA_4 \ | |
370 | AV_WN16A(dst + line_offset ,\ | |
371 | (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | |
372 | AV_WN16A(dst + line_offset + 2,\ | |
373 | (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | |
374 | if (mode >= 3) {\ | |
375 | if (is_top_of_cell && !cell->ypos) {\ | |
376 | AV_COPY32U(dst, dst + row_offset);\ | |
377 | } else {\ | |
378 | AVG_32(dst, ref, dst + row_offset);\ | |
379 | }\ | |
380 | } | |
381 | ||
382 | #define APPLY_DELTA_8 \ | |
383 | /* apply two 32-bit VQ deltas to next even line */\ | |
384 | if (is_top_of_cell) { \ | |
385 | AV_WN32A(dst + row_offset , \ | |
386 | (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | |
387 | AV_WN32A(dst + row_offset + 4, \ | |
388 | (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | |
389 | } else { \ | |
390 | AV_WN32A(dst + row_offset , \ | |
391 | (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | |
392 | AV_WN32A(dst + row_offset + 4, \ | |
393 | (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | |
394 | } \ | |
395 | /* odd lines are not coded but rather interpolated/replicated */\ | |
396 | /* first line of the cell on the top of image? - replicate */\ | |
397 | /* otherwise - interpolate */\ | |
398 | if (is_top_of_cell && !cell->ypos) {\ | |
399 | AV_COPY64U(dst, dst + row_offset);\ | |
400 | } else \ | |
401 | AVG_64(dst, ref, dst + row_offset); | |
402 | ||
403 | ||
404 | #define APPLY_DELTA_1011_INTER \ | |
405 | if (mode == 10) { \ | |
406 | AV_WN32A(dst , \ | |
407 | (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | |
408 | AV_WN32A(dst + 4 , \ | |
409 | (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | |
410 | AV_WN32A(dst + row_offset , \ | |
411 | (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\ | |
412 | AV_WN32A(dst + row_offset + 4, \ | |
413 | (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\ | |
414 | } else { \ | |
415 | AV_WN16A(dst , \ | |
416 | (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | |
417 | AV_WN16A(dst + 2 , \ | |
418 | (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | |
419 | AV_WN16A(dst + row_offset , \ | |
420 | (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\ | |
421 | AV_WN16A(dst + row_offset + 2, \ | |
422 | (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\ | |
423 | } | |
424 | ||
425 | ||
426 | static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell, | |
427 | uint8_t *block, uint8_t *ref_block, | |
428 | int pitch, int h_zoom, int v_zoom, int mode, | |
429 | const vqEntry *delta[2], int swap_quads[2], | |
430 | const uint8_t **data_ptr, const uint8_t *last_ptr) | |
431 | { | |
432 | int x, y, line, num_lines; | |
433 | int rle_blocks = 0; | |
434 | uint8_t code, *dst, *ref; | |
435 | const vqEntry *delta_tab; | |
436 | unsigned int dyad1, dyad2; | |
437 | uint64_t pix64; | |
438 | int skip_flag = 0, is_top_of_cell, is_first_row = 1; | |
439 | int row_offset, blk_row_offset, line_offset; | |
440 | ||
441 | row_offset = pitch; | |
442 | blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2); | |
443 | line_offset = v_zoom ? row_offset : 0; | |
444 | ||
445 | if (cell->height & v_zoom || cell->width & h_zoom) | |
446 | return IV3_BAD_DATA; | |
447 | ||
448 | for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) { | |
449 | for (x = 0; x < cell->width; x += 1 + h_zoom) { | |
450 | ref = ref_block; | |
451 | dst = block; | |
452 | ||
453 | if (rle_blocks > 0) { | |
454 | if (mode <= 4) { | |
455 | RLE_BLOCK_COPY; | |
456 | } else if (mode == 10 && !cell->mv_ptr) { | |
457 | RLE_BLOCK_COPY_8; | |
458 | } | |
459 | rle_blocks--; | |
460 | } else { | |
461 | for (line = 0; line < 4;) { | |
462 | num_lines = 1; | |
463 | is_top_of_cell = is_first_row && !line; | |
464 | ||
465 | /* select primary VQ table for odd, secondary for even lines */ | |
466 | if (mode <= 4) | |
467 | delta_tab = delta[line & 1]; | |
468 | else | |
469 | delta_tab = delta[1]; | |
470 | BUFFER_PRECHECK; | |
471 | code = bytestream_get_byte(data_ptr); | |
472 | if (code < 248) { | |
473 | if (code < delta_tab->num_dyads) { | |
474 | BUFFER_PRECHECK; | |
475 | dyad1 = bytestream_get_byte(data_ptr); | |
476 | dyad2 = code; | |
477 | if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248) | |
478 | return IV3_BAD_DATA; | |
479 | } else { | |
480 | /* process QUADS */ | |
481 | code -= delta_tab->num_dyads; | |
482 | dyad1 = code / delta_tab->quad_exp; | |
483 | dyad2 = code % delta_tab->quad_exp; | |
484 | if (swap_quads[line & 1]) | |
485 | FFSWAP(unsigned int, dyad1, dyad2); | |
486 | } | |
487 | if (mode <= 4) { | |
488 | APPLY_DELTA_4; | |
489 | } else if (mode == 10 && !cell->mv_ptr) { | |
490 | APPLY_DELTA_8; | |
491 | } else { | |
492 | APPLY_DELTA_1011_INTER; | |
493 | } | |
494 | } else { | |
495 | /* process RLE codes */ | |
496 | switch (code) { | |
497 | case RLE_ESC_FC: | |
498 | skip_flag = 0; | |
499 | rle_blocks = 1; | |
500 | code = 253; | |
501 | /* FALLTHROUGH */ | |
502 | case RLE_ESC_FF: | |
503 | case RLE_ESC_FE: | |
504 | case RLE_ESC_FD: | |
505 | num_lines = 257 - code - line; | |
506 | if (num_lines <= 0) | |
507 | return IV3_BAD_RLE; | |
508 | if (mode <= 4) { | |
509 | RLE_LINES_COPY; | |
510 | } else if (mode == 10 && !cell->mv_ptr) { | |
511 | RLE_LINES_COPY_M10; | |
512 | } | |
513 | break; | |
514 | case RLE_ESC_FB: | |
515 | BUFFER_PRECHECK; | |
516 | code = bytestream_get_byte(data_ptr); | |
517 | rle_blocks = (code & 0x1F) - 1; /* set block counter */ | |
518 | if (code >= 64 || rle_blocks < 0) | |
519 | return IV3_BAD_COUNTER; | |
520 | skip_flag = code & 0x20; | |
521 | num_lines = 4 - line; /* enforce next block processing */ | |
522 | if (mode >= 10 || (cell->mv_ptr || !skip_flag)) { | |
523 | if (mode <= 4) { | |
524 | RLE_LINES_COPY; | |
525 | } else if (mode == 10 && !cell->mv_ptr) { | |
526 | RLE_LINES_COPY_M10; | |
527 | } | |
528 | } | |
529 | break; | |
530 | case RLE_ESC_F9: | |
531 | skip_flag = 1; | |
532 | rle_blocks = 1; | |
533 | /* FALLTHROUGH */ | |
534 | case RLE_ESC_FA: | |
535 | if (line) | |
536 | return IV3_BAD_RLE; | |
537 | num_lines = 4; /* enforce next block processing */ | |
538 | if (cell->mv_ptr) { | |
539 | if (mode <= 4) { | |
540 | RLE_LINES_COPY; | |
541 | } else if (mode == 10 && !cell->mv_ptr) { | |
542 | RLE_LINES_COPY_M10; | |
543 | } | |
544 | } | |
545 | break; | |
546 | default: | |
547 | return IV3_UNSUPPORTED; | |
548 | } | |
549 | } | |
550 | ||
551 | line += num_lines; | |
552 | ref += row_offset * (num_lines << v_zoom); | |
553 | dst += row_offset * (num_lines << v_zoom); | |
554 | } | |
555 | } | |
556 | ||
557 | /* move to next horizontal block */ | |
558 | block += 4 << h_zoom; | |
559 | ref_block += 4 << h_zoom; | |
560 | } | |
561 | ||
562 | /* move to next line of blocks */ | |
563 | ref_block += blk_row_offset; | |
564 | block += blk_row_offset; | |
565 | } | |
566 | 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 | 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 | int offset, error = 0, swap_quads[2]; | |
590 | uint8_t code, *block, *ref_block = 0; | |
591 | const vqEntry *delta[2]; | |
592 | const uint8_t *data_start = data_ptr; | |
593 | ||
594 | /* get coding mode and VQ table index from the VQ descriptor byte */ | |
595 | code = *data_ptr++; | |
596 | mode = code >> 4; | |
597 | vq_index = code & 0xF; | |
598 | ||
599 | /* setup output and reference pointers */ | |
600 | offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2); | |
601 | block = plane->pixels[ctx->buf_sel] + offset; | |
602 | ||
603 | if (!cell->mv_ptr) { | |
604 | /* use previous line as reference for INTRA cells */ | |
605 | ref_block = block - plane->pitch; | |
606 | } 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 | int ret = copy_cell(ctx, plane, cell); | |
610 | if (ret < 0) | |
611 | return ret; | |
612 | } else { | |
613 | /* set the pointer to the reference pixels for modes 0-4 INTER */ | |
614 | mv_y = cell->mv_ptr[0]; | |
615 | mv_x = cell->mv_ptr[1]; | |
616 | ||
617 | /* -1 because there is an extra line on top for prediction */ | |
618 | if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 || | |
619 | ((cell->ypos + cell->height) << 2) + mv_y > plane->height || | |
620 | ((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 | offset += mv_y * plane->pitch + mv_x; | |
627 | 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 | 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 | vq_index += ctx->cb_offset; | |
639 | prim_indx = second_indx = vq_index; | |
640 | } | |
641 | ||
642 | 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 | delta[0] = &vq_tab[second_indx]; | |
649 | delta[1] = &vq_tab[prim_indx]; | |
650 | swap_quads[0] = second_indx >= 16; | |
651 | 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 | if (vq_index >= 8 && ref_block) { | |
656 | for (x = 0; x < cell->width << 2; x++) | |
657 | ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127]; | |
658 | } | |
659 | ||
660 | error = IV3_NOERR; | |
661 | ||
662 | switch (mode) { | |
663 | case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/ | |
664 | case 1: | |
665 | case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/ | |
666 | case 4: | |
667 | 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 | zoom_fac = mode >= 3; | |
673 | 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 | break; | |
677 | case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/ | |
678 | case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/ | |
679 | if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */ | |
680 | 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 | 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 | zoom_fac = mode == 10; | |
690 | 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 | 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 | 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 | 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 | 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 | 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 | curr_cell = *ref_cell; // clone parent cell | |
767 | if (code == H_SPLIT) { | |
768 | SPLIT_CELL(ref_cell->height, curr_cell.height); | |
769 | ref_cell->ypos += curr_cell.height; | |
770 | ref_cell->height -= curr_cell.height; | |
771 | if (ref_cell->height <= 0 || curr_cell.height <= 0) | |
772 | return AVERROR_INVALIDDATA; | |
773 | } else if (code == V_SPLIT) { | |
774 | if (curr_cell.width > strip_width) { | |
775 | /* split strip */ | |
776 | curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width; | |
777 | } else | |
778 | SPLIT_CELL(ref_cell->width, curr_cell.width); | |
779 | ref_cell->xpos += curr_cell.width; | |
780 | ref_cell->width -= curr_cell.width; | |
781 | if (ref_cell->width <= 0 || curr_cell.width <= 0) | |
782 | return AVERROR_INVALIDDATA; | |
783 | } | |
784 | ||
785 | while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */ | |
786 | RESYNC_BITSTREAM; | |
787 | switch (code = get_bits(&ctx->gb, 2)) { | |
788 | case H_SPLIT: | |
789 | case V_SPLIT: | |
790 | if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width)) | |
791 | return AVERROR_INVALIDDATA; | |
792 | break; | |
793 | case INTRA_NULL: | |
794 | if (!curr_cell.tree) { /* MC tree INTRA code */ | |
795 | curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */ | |
796 | curr_cell.tree = 1; /* enter the VQ tree */ | |
797 | } else { /* VQ tree NULL code */ | |
798 | RESYNC_BITSTREAM; | |
799 | code = get_bits(&ctx->gb, 2); | |
800 | if (code >= 2) { | |
801 | av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code); | |
802 | return AVERROR_INVALIDDATA; | |
803 | } | |
804 | if (code == 1) | |
805 | av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n"); | |
806 | ||
807 | CHECK_CELL | |
808 | if (!curr_cell.mv_ptr) | |
809 | return AVERROR_INVALIDDATA; | |
810 | ||
811 | ret = copy_cell(ctx, plane, &curr_cell); | |
812 | return ret; | |
813 | } | |
814 | break; | |
815 | case INTER_DATA: | |
816 | 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 | if (!ctx->need_resync) | |
820 | ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3]; | |
821 | 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 | mv_idx = *(ctx->next_cell_data++); | |
826 | 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 | curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1]; | |
831 | curr_cell.tree = 1; /* enter the VQ tree */ | |
832 | UPDATE_BITPOS(8); | |
833 | } else { /* VQ tree DATA code */ | |
834 | if (!ctx->need_resync) | |
835 | ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3]; | |
836 | ||
837 | CHECK_CELL | |
838 | bytes_used = decode_cell(ctx, avctx, plane, &curr_cell, | |
839 | ctx->next_cell_data, ctx->last_byte); | |
840 | if (bytes_used < 0) | |
841 | return AVERROR_INVALIDDATA; | |
842 | ||
843 | UPDATE_BITPOS(bytes_used << 3); | |
844 | ctx->next_cell_data += bytes_used; | |
845 | return 0; | |
846 | } | |
847 | break; | |
848 | } | |
849 | }//while | |
850 | ||
851 | return AVERROR_INVALIDDATA; | |
852 | } | |
853 | ||
854 | ||
855 | 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 | num_vectors = bytestream_get_le32(&data); data_size -= 4; | |
865 | 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 | if (num_vectors * 2 > data_size) | |
871 | return AVERROR_INVALIDDATA; | |
872 | ||
873 | ctx->num_vectors = num_vectors; | |
874 | ctx->mc_vectors = num_vectors ? data : 0; | |
875 | ||
876 | /* init the bitreader */ | |
877 | init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3); | |
878 | ctx->skip_bits = 0; | |
879 | ctx->need_resync = 0; | |
880 | ||
881 | ctx->last_byte = data + data_size; | |
882 | ||
883 | /* initialize the 1st cell and set its dimensions to whole plane */ | |
884 | curr_cell.xpos = curr_cell.ypos = 0; | |
885 | curr_cell.width = plane->width >> 2; | |
886 | curr_cell.height = plane->height >> 2; | |
887 | curr_cell.tree = 0; // we are in the MC tree now | |
888 | curr_cell.mv_ptr = 0; // no motion vector = INTRA cell | |
889 | ||
890 | 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 | 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; | |
092a9121 DM |
902 | int y_offset, u_offset, v_offset; |
903 | uint32_t starts[3], ends[3]; | |
2ba45a60 DM |
904 | uint16_t height, width; |
905 | int i, j; | |
906 | ||
907 | bytestream2_init(&gb, buf, buf_size); | |
908 | ||
909 | /* parse and check the OS header */ | |
910 | frame_num = bytestream2_get_le32(&gb); | |
911 | word2 = bytestream2_get_le32(&gb); | |
912 | check_sum = bytestream2_get_le32(&gb); | |
913 | data_size = bytestream2_get_le32(&gb); | |
914 | ||
915 | 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 | bs_hdr = gb.buffer; | |
922 | ||
923 | if (bytestream2_get_le16(&gb) != 32) { | |
924 | av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n"); | |
925 | return AVERROR_INVALIDDATA; | |
926 | } | |
927 | ||
928 | ctx->frame_num = frame_num; | |
929 | ctx->frame_flags = bytestream2_get_le16(&gb); | |
930 | ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3; | |
931 | ctx->cb_offset = bytestream2_get_byte(&gb); | |
932 | ||
933 | if (ctx->data_size == 16) | |
934 | return 4; | |
935 | ctx->data_size = FFMIN(ctx->data_size, buf_size - 16); | |
936 | ||
937 | bytestream2_skip(&gb, 3); // skip reserved byte and checksum | |
938 | ||
939 | /* check frame dimensions */ | |
940 | height = bytestream2_get_le16(&gb); | |
941 | width = bytestream2_get_le16(&gb); | |
942 | if (av_image_check_size(width, height, 0, avctx)) | |
943 | return AVERROR_INVALIDDATA; | |
944 | ||
945 | if (width != ctx->width || height != ctx->height) { | |
946 | int res; | |
947 | ||
948 | av_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 | y_offset = bytestream2_get_le32(&gb); | |
965 | v_offset = bytestream2_get_le32(&gb); | |
966 | u_offset = bytestream2_get_le32(&gb); | |
967 | 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 | starts[0] = y_offset; | |
972 | starts[1] = v_offset; | |
973 | starts[2] = u_offset; | |
974 | ||
975 | for (j = 0; j < 3; j++) { | |
976 | ends[j] = ctx->data_size; | |
977 | for (i = 2; i >= 0; i--) | |
978 | if (starts[i] < ends[j] && starts[i] > starts[j]) | |
979 | ends[j] = starts[i]; | |
980 | } | |
981 | ||
982 | ctx->y_data_size = ends[0] - starts[0]; | |
983 | ctx->v_data_size = ends[1] - starts[1]; | |
984 | ctx->u_data_size = ends[2] - starts[2]; | |
092a9121 DM |
985 | if (FFMIN3(y_offset, v_offset, u_offset) < 0 || |
986 | FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 || | |
2ba45a60 DM |
987 | FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 || |
988 | 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 | ctx->y_data_ptr = bs_hdr + y_offset; | |
994 | ctx->v_data_ptr = bs_hdr + v_offset; | |
995 | ctx->u_data_ptr = bs_hdr + u_offset; | |
996 | ctx->alt_quant = gb.buffer; | |
997 | ||
998 | if (ctx->data_size == 16) { | |
999 | av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n"); | |
1000 | return 16; | |
1001 | } | |
1002 | ||
1003 | if (ctx->frame_flags & BS_8BIT_PEL) { | |
1004 | avpriv_request_sample(avctx, "8-bit pixel format"); | |
1005 | return AVERROR_PATCHWELCOME; | |
1006 | } | |
1007 | ||
1008 | 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 | 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 | static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, | |
1028 | int dst_pitch, int dst_height) | |
1029 | { | |
1030 | int x,y; | |
1031 | const uint8_t *src = plane->pixels[buf_sel]; | |
1032 | uint32_t pitch = plane->pitch; | |
1033 | ||
1034 | dst_height = FFMIN(dst_height, plane->height); | |
1035 | for (y = 0; y < dst_height; y++) { | |
1036 | /* convert four pixels at once using SWAR */ | |
1037 | for (x = 0; x < plane->width >> 2; x++) { | |
1038 | AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1); | |
1039 | src += 4; | |
1040 | dst += 4; | |
1041 | } | |
1042 | ||
1043 | for (x <<= 2; x < plane->width; x++) | |
1044 | *dst++ = *src++ << 1; | |
1045 | ||
1046 | src += pitch - plane->width; | |
1047 | dst += dst_pitch - plane->width; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | ||
1052 | static av_cold int decode_init(AVCodecContext *avctx) | |
1053 | { | |
1054 | Indeo3DecodeContext *ctx = avctx->priv_data; | |
1055 | ||
1056 | ctx->avctx = avctx; | |
1057 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; | |
1058 | ||
1059 | build_requant_tab(); | |
1060 | ||
1061 | ff_hpeldsp_init(&ctx->hdsp, avctx->flags); | |
1062 | ||
1063 | return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height); | |
1064 | } | |
1065 | ||
1066 | ||
1067 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
1068 | AVPacket *avpkt) | |
1069 | { | |
1070 | Indeo3DecodeContext *ctx = avctx->priv_data; | |
1071 | const uint8_t *buf = avpkt->data; | |
1072 | int buf_size = avpkt->size; | |
1073 | AVFrame *frame = data; | |
1074 | int res; | |
1075 | ||
1076 | res = decode_frame_headers(ctx, avctx, buf, buf_size); | |
1077 | if (res < 0) | |
1078 | return res; | |
1079 | ||
1080 | /* skip sync(null) frames */ | |
1081 | 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 | if (ctx->frame_flags & BS_NONREF && | |
1089 | (avctx->skip_frame >= AVDISCARD_NONREF)) | |
1090 | return 0; | |
1091 | ||
1092 | /* skip INTER frames if requested */ | |
1093 | if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY) | |
1094 | return 0; | |
1095 | ||
1096 | /* use BS_BUFFER flag for buffer switching */ | |
1097 | ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1; | |
1098 | ||
1099 | if ((res = ff_get_buffer(avctx, frame, 0)) < 0) | |
1100 | return res; | |
1101 | ||
1102 | /* decode luma plane */ | |
1103 | 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 | if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10))) | |
1108 | return res; | |
1109 | ||
1110 | if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10))) | |
1111 | return res; | |
1112 | ||
1113 | output_plane(&ctx->planes[0], ctx->buf_sel, | |
1114 | frame->data[0], frame->linesize[0], | |
1115 | avctx->height); | |
1116 | output_plane(&ctx->planes[1], ctx->buf_sel, | |
1117 | frame->data[1], frame->linesize[1], | |
1118 | (avctx->height + 3) >> 2); | |
1119 | output_plane(&ctx->planes[2], ctx->buf_sel, | |
1120 | frame->data[2], frame->linesize[2], | |
1121 | (avctx->height + 3) >> 2); | |
1122 | ||
1123 | *got_frame = 1; | |
1124 | ||
1125 | return buf_size; | |
1126 | } | |
1127 | ||
1128 | ||
1129 | static av_cold int decode_close(AVCodecContext *avctx) | |
1130 | { | |
1131 | free_frame_buffers(avctx->priv_data); | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | AVCodec ff_indeo3_decoder = { | |
1137 | .name = "indeo3", | |
1138 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"), | |
1139 | .type = AVMEDIA_TYPE_VIDEO, | |
1140 | .id = AV_CODEC_ID_INDEO3, | |
1141 | .priv_data_size = sizeof(Indeo3DecodeContext), | |
1142 | .init = decode_init, | |
1143 | .close = decode_close, | |
1144 | .decode = decode_frame, | |
1145 | .capabilities = CODEC_CAP_DR1, | |
1146 | }; |