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1 | /* |
2 | * VC3/DNxHD decoder. | |
3 | * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> | |
4 | * Copyright (c) 2011 MirriAd Ltd | |
5 | * | |
6 | * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com> | |
7 | * | |
8 | * This file is part of FFmpeg. | |
9 | * | |
10 | * FFmpeg is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU Lesser General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2.1 of the License, or (at your option) any later version. | |
14 | * | |
15 | * FFmpeg is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public | |
21 | * License along with FFmpeg; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | */ | |
24 | ||
25 | #include "libavutil/imgutils.h" | |
26 | #include "libavutil/timer.h" | |
27 | #include "avcodec.h" | |
28 | #include "blockdsp.h" | |
29 | #include "get_bits.h" | |
30 | #include "dnxhddata.h" | |
31 | #include "idctdsp.h" | |
32 | #include "internal.h" | |
33 | #include "thread.h" | |
34 | ||
35 | typedef struct DNXHDContext { | |
36 | AVCodecContext *avctx; | |
37 | GetBitContext gb; | |
38 | BlockDSPContext bdsp; | |
39 | int64_t cid; ///< compression id | |
40 | unsigned int width, height; | |
41 | enum AVPixelFormat pix_fmt; | |
42 | unsigned int mb_width, mb_height; | |
43 | uint32_t mb_scan_index[68]; /* max for 1080p */ | |
44 | int cur_field; ///< current interlaced field | |
45 | VLC ac_vlc, dc_vlc, run_vlc; | |
46 | int last_dc[3]; | |
47 | IDCTDSPContext idsp; | |
48 | DECLARE_ALIGNED(16, int16_t, blocks)[12][64]; | |
49 | ScanTable scantable; | |
50 | const CIDEntry *cid_table; | |
51 | int bit_depth; // 8, 10 or 0 if not initialized at all. | |
52 | int is_444; | |
53 | void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block, | |
54 | int n, int qscale); | |
55 | int last_qscale; | |
56 | int luma_scale[64]; | |
57 | int chroma_scale[64]; | |
58 | } DNXHDContext; | |
59 | ||
60 | #define DNXHD_VLC_BITS 9 | |
61 | #define DNXHD_DC_VLC_BITS 7 | |
62 | ||
63 | static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, | |
64 | int n, int qscale); | |
65 | static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, | |
66 | int n, int qscale); | |
67 | static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, | |
68 | int n, int qscale); | |
69 | ||
70 | static av_cold int dnxhd_decode_init(AVCodecContext *avctx) | |
71 | { | |
72 | DNXHDContext *ctx = avctx->priv_data; | |
73 | ||
74 | ctx->avctx = avctx; | |
75 | ctx->cid = -1; | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid) | |
80 | { | |
81 | if (cid != ctx->cid) { | |
82 | int index; | |
83 | ||
84 | if ((index = ff_dnxhd_get_cid_table(cid)) < 0) { | |
85 | av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid); | |
86 | return AVERROR(ENOSYS); | |
87 | } | |
88 | if (ff_dnxhd_cid_table[index].bit_depth != ctx->bit_depth) { | |
89 | av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, ctx->bit_depth); | |
90 | return AVERROR_INVALIDDATA; | |
91 | } | |
92 | ctx->cid_table = &ff_dnxhd_cid_table[index]; | |
93 | ||
94 | ff_free_vlc(&ctx->ac_vlc); | |
95 | ff_free_vlc(&ctx->dc_vlc); | |
96 | ff_free_vlc(&ctx->run_vlc); | |
97 | ||
98 | init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257, | |
99 | ctx->cid_table->ac_bits, 1, 1, | |
100 | ctx->cid_table->ac_codes, 2, 2, 0); | |
101 | init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4, | |
102 | ctx->cid_table->dc_bits, 1, 1, | |
103 | ctx->cid_table->dc_codes, 1, 1, 0); | |
104 | init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62, | |
105 | ctx->cid_table->run_bits, 1, 1, | |
106 | ctx->cid_table->run_codes, 2, 2, 0); | |
107 | ||
108 | ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, | |
109 | ff_zigzag_direct); | |
110 | ctx->cid = cid; | |
111 | } | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, | |
116 | const uint8_t *buf, int buf_size, | |
117 | int first_field) | |
118 | { | |
119 | static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 }; | |
120 | static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 }; | |
121 | int i, cid, ret; | |
122 | ||
123 | if (buf_size < 0x280) | |
124 | return AVERROR_INVALIDDATA; | |
125 | ||
126 | if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) { | |
127 | av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n"); | |
128 | return AVERROR_INVALIDDATA; | |
129 | } | |
130 | if (buf[5] & 2) { /* interlaced */ | |
131 | ctx->cur_field = buf[5] & 1; | |
132 | frame->interlaced_frame = 1; | |
133 | frame->top_field_first = first_field ^ ctx->cur_field; | |
134 | av_log(ctx->avctx, AV_LOG_DEBUG, | |
135 | "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field); | |
136 | } | |
137 | ||
138 | ctx->height = AV_RB16(buf + 0x18); | |
139 | ctx->width = AV_RB16(buf + 0x1a); | |
140 | ||
141 | av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height); | |
142 | ||
143 | ctx->is_444 = 0; | |
144 | if (buf[0x4] == 0x2) { | |
145 | ctx->pix_fmt = AV_PIX_FMT_YUV444P10; | |
146 | ctx->avctx->bits_per_raw_sample = 10; | |
147 | if (ctx->bit_depth != 10) { | |
148 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); | |
149 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); | |
150 | ctx->bit_depth = 10; | |
151 | ctx->decode_dct_block = dnxhd_decode_dct_block_10_444; | |
152 | } | |
153 | ctx->is_444 = 1; | |
154 | } else if (buf[0x21] & 0x40) { | |
155 | ctx->pix_fmt = AV_PIX_FMT_YUV422P10; | |
156 | ctx->avctx->bits_per_raw_sample = 10; | |
157 | if (ctx->bit_depth != 10) { | |
158 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); | |
159 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); | |
160 | ctx->bit_depth = 10; | |
161 | ctx->decode_dct_block = dnxhd_decode_dct_block_10; | |
162 | } | |
163 | } else { | |
164 | ctx->pix_fmt = AV_PIX_FMT_YUV422P; | |
165 | ctx->avctx->bits_per_raw_sample = 8; | |
166 | if (ctx->bit_depth != 8) { | |
167 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); | |
168 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); | |
169 | ctx->bit_depth = 8; | |
170 | ctx->decode_dct_block = dnxhd_decode_dct_block_8; | |
171 | } | |
172 | } | |
173 | ||
174 | cid = AV_RB32(buf + 0x28); | |
175 | av_dlog(ctx->avctx, "compression id %d\n", cid); | |
176 | ||
177 | if ((ret = dnxhd_init_vlc(ctx, cid)) < 0) | |
178 | return ret; | |
179 | ||
180 | if (buf_size < ctx->cid_table->coding_unit_size) { | |
181 | av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n"); | |
182 | return AVERROR_INVALIDDATA; | |
183 | } | |
184 | ||
185 | ctx->mb_width = ctx->width >> 4; | |
186 | ctx->mb_height = buf[0x16d]; | |
187 | ||
188 | av_dlog(ctx->avctx, | |
189 | "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height); | |
190 | ||
191 | if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame) | |
192 | ctx->height <<= 1; | |
193 | ||
194 | if (ctx->mb_height > 68 || | |
195 | (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) { | |
196 | av_log(ctx->avctx, AV_LOG_ERROR, | |
197 | "mb height too big: %d\n", ctx->mb_height); | |
198 | return AVERROR_INVALIDDATA; | |
199 | } | |
200 | ||
201 | for (i = 0; i < ctx->mb_height; i++) { | |
202 | ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2)); | |
203 | av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]); | |
204 | if (buf_size < ctx->mb_scan_index[i] + 0x280LL) { | |
205 | av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n"); | |
206 | return AVERROR_INVALIDDATA; | |
207 | } | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx, | |
214 | int16_t *block, int n, | |
215 | int qscale, | |
216 | int index_bits, | |
217 | int level_bias, | |
218 | int level_shift) | |
219 | { | |
220 | int i, j, index1, index2, len, flags; | |
221 | int level, component, sign; | |
222 | const int *scale; | |
223 | const uint8_t *weight_matrix; | |
224 | const uint8_t *ac_level = ctx->cid_table->ac_level; | |
225 | const uint8_t *ac_flags = ctx->cid_table->ac_flags; | |
226 | const int eob_index = ctx->cid_table->eob_index; | |
227 | OPEN_READER(bs, &ctx->gb); | |
228 | ||
229 | if (!ctx->is_444) { | |
230 | if (n & 2) { | |
231 | component = 1 + (n & 1); | |
232 | scale = ctx->chroma_scale; | |
233 | weight_matrix = ctx->cid_table->chroma_weight; | |
234 | } else { | |
235 | component = 0; | |
236 | scale = ctx->luma_scale; | |
237 | weight_matrix = ctx->cid_table->luma_weight; | |
238 | } | |
239 | } else { | |
240 | component = (n >> 1) % 3; | |
241 | if (component) { | |
242 | scale = ctx->chroma_scale; | |
243 | weight_matrix = ctx->cid_table->chroma_weight; | |
244 | } else { | |
245 | scale = ctx->luma_scale; | |
246 | weight_matrix = ctx->cid_table->luma_weight; | |
247 | } | |
248 | } | |
249 | ||
250 | UPDATE_CACHE(bs, &ctx->gb); | |
251 | GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1); | |
252 | if (len) { | |
253 | level = GET_CACHE(bs, &ctx->gb); | |
254 | LAST_SKIP_BITS(bs, &ctx->gb, len); | |
255 | sign = ~level >> 31; | |
256 | level = (NEG_USR32(sign ^ level, len) ^ sign) - sign; | |
257 | ctx->last_dc[component] += level; | |
258 | } | |
259 | block[0] = ctx->last_dc[component]; | |
260 | ||
261 | i = 0; | |
262 | ||
263 | UPDATE_CACHE(bs, &ctx->gb); | |
264 | GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table, | |
265 | DNXHD_VLC_BITS, 2); | |
266 | ||
267 | while (index1 != eob_index) { | |
268 | level = ac_level[index1]; | |
269 | flags = ac_flags[index1]; | |
270 | ||
271 | sign = SHOW_SBITS(bs, &ctx->gb, 1); | |
272 | SKIP_BITS(bs, &ctx->gb, 1); | |
273 | ||
274 | if (flags & 1) { | |
275 | level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 7; | |
276 | SKIP_BITS(bs, &ctx->gb, index_bits); | |
277 | } | |
278 | ||
279 | if (flags & 2) { | |
280 | UPDATE_CACHE(bs, &ctx->gb); | |
281 | GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table, | |
282 | DNXHD_VLC_BITS, 2); | |
283 | i += ctx->cid_table->run[index2]; | |
284 | } | |
285 | ||
286 | if (++i > 63) { | |
287 | av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i); | |
288 | break; | |
289 | } | |
290 | ||
291 | j = ctx->scantable.permutated[i]; | |
292 | level *= scale[i]; | |
293 | if (level_bias < 32 || weight_matrix[i] != level_bias) | |
294 | level += level_bias; | |
295 | level >>= level_shift; | |
296 | ||
297 | block[j] = (level ^ sign) - sign; | |
298 | ||
299 | UPDATE_CACHE(bs, &ctx->gb); | |
300 | GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table, | |
301 | DNXHD_VLC_BITS, 2); | |
302 | } | |
303 | ||
304 | CLOSE_READER(bs, &ctx->gb); | |
305 | } | |
306 | ||
307 | static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, | |
308 | int n, int qscale) | |
309 | { | |
310 | dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6); | |
311 | } | |
312 | ||
313 | static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, | |
314 | int n, int qscale) | |
315 | { | |
316 | dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4); | |
317 | } | |
318 | ||
319 | static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, | |
320 | int n, int qscale) | |
321 | { | |
322 | dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6); | |
323 | } | |
324 | ||
325 | static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, | |
326 | int x, int y) | |
327 | { | |
328 | int shift1 = ctx->bit_depth == 10; | |
329 | int dct_linesize_luma = frame->linesize[0]; | |
330 | int dct_linesize_chroma = frame->linesize[1]; | |
331 | uint8_t *dest_y, *dest_u, *dest_v; | |
332 | int dct_y_offset, dct_x_offset; | |
333 | int qscale, i; | |
334 | ||
335 | qscale = get_bits(&ctx->gb, 11); | |
336 | skip_bits1(&ctx->gb); | |
337 | ||
338 | if (qscale != ctx->last_qscale) { | |
339 | for (i = 0; i < 64; i++) { | |
340 | ctx->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i]; | |
341 | ctx->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i]; | |
342 | } | |
343 | ctx->last_qscale = qscale; | |
344 | } | |
345 | ||
346 | for (i = 0; i < 8; i++) { | |
347 | ctx->bdsp.clear_block(ctx->blocks[i]); | |
348 | ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale); | |
349 | } | |
350 | if (ctx->is_444) { | |
351 | for (; i < 12; i++) { | |
352 | ctx->bdsp.clear_block(ctx->blocks[i]); | |
353 | ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale); | |
354 | } | |
355 | } | |
356 | ||
357 | if (frame->interlaced_frame) { | |
358 | dct_linesize_luma <<= 1; | |
359 | dct_linesize_chroma <<= 1; | |
360 | } | |
361 | ||
362 | dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1)); | |
363 | dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); | |
364 | dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); | |
365 | ||
366 | if (ctx->cur_field) { | |
367 | dest_y += frame->linesize[0]; | |
368 | dest_u += frame->linesize[1]; | |
369 | dest_v += frame->linesize[2]; | |
370 | } | |
371 | ||
372 | dct_y_offset = dct_linesize_luma << 3; | |
373 | dct_x_offset = 8 << shift1; | |
374 | if (!ctx->is_444) { | |
375 | ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]); | |
376 | ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]); | |
377 | ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]); | |
378 | ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]); | |
379 | ||
380 | if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) { | |
381 | dct_y_offset = dct_linesize_chroma << 3; | |
382 | ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]); | |
383 | ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]); | |
384 | ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]); | |
385 | ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]); | |
386 | } | |
387 | } else { | |
388 | ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]); | |
389 | ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]); | |
390 | ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]); | |
391 | ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]); | |
392 | ||
393 | if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) { | |
394 | dct_y_offset = dct_linesize_chroma << 3; | |
395 | ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]); | |
396 | ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]); | |
397 | ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]); | |
398 | ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]); | |
399 | ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]); | |
400 | ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]); | |
401 | ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]); | |
402 | ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]); | |
403 | } | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame, | |
410 | const uint8_t *buf, int buf_size) | |
411 | { | |
412 | int x, y; | |
413 | for (y = 0; y < ctx->mb_height; y++) { | |
414 | ctx->last_dc[0] = | |
415 | ctx->last_dc[1] = | |
416 | ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1) | |
417 | init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3); | |
418 | for (x = 0; x < ctx->mb_width; x++) { | |
419 | //START_TIMER; | |
420 | dnxhd_decode_macroblock(ctx, frame, x, y); | |
421 | //STOP_TIMER("decode macroblock"); | |
422 | } | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, | |
428 | int *got_frame, AVPacket *avpkt) | |
429 | { | |
430 | const uint8_t *buf = avpkt->data; | |
431 | int buf_size = avpkt->size; | |
432 | DNXHDContext *ctx = avctx->priv_data; | |
433 | ThreadFrame frame = { .f = data }; | |
434 | AVFrame *picture = data; | |
435 | int first_field = 1; | |
436 | int ret; | |
437 | ||
438 | av_dlog(avctx, "frame size %d\n", buf_size); | |
439 | ||
440 | decode_coding_unit: | |
441 | if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0) | |
442 | return ret; | |
443 | ||
444 | if ((avctx->width || avctx->height) && | |
445 | (ctx->width != avctx->width || ctx->height != avctx->height)) { | |
446 | av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n", | |
447 | avctx->width, avctx->height, ctx->width, ctx->height); | |
448 | first_field = 1; | |
449 | } | |
450 | if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) { | |
451 | av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n", | |
452 | av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt)); | |
453 | first_field = 1; | |
454 | } | |
455 | ||
456 | avctx->pix_fmt = ctx->pix_fmt; | |
457 | ret = ff_set_dimensions(avctx, ctx->width, ctx->height); | |
458 | if (ret < 0) | |
459 | return ret; | |
460 | ||
461 | if (first_field) { | |
462 | if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) | |
463 | return ret; | |
464 | picture->pict_type = AV_PICTURE_TYPE_I; | |
465 | picture->key_frame = 1; | |
466 | } | |
467 | ||
468 | dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280); | |
469 | ||
470 | if (first_field && picture->interlaced_frame) { | |
471 | buf += ctx->cid_table->coding_unit_size; | |
472 | buf_size -= ctx->cid_table->coding_unit_size; | |
473 | first_field = 0; | |
474 | goto decode_coding_unit; | |
475 | } | |
476 | ||
477 | *got_frame = 1; | |
478 | return avpkt->size; | |
479 | } | |
480 | ||
481 | static av_cold int dnxhd_decode_close(AVCodecContext *avctx) | |
482 | { | |
483 | DNXHDContext *ctx = avctx->priv_data; | |
484 | ||
485 | ff_free_vlc(&ctx->ac_vlc); | |
486 | ff_free_vlc(&ctx->dc_vlc); | |
487 | ff_free_vlc(&ctx->run_vlc); | |
488 | return 0; | |
489 | } | |
490 | ||
491 | AVCodec ff_dnxhd_decoder = { | |
492 | .name = "dnxhd", | |
493 | .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"), | |
494 | .type = AVMEDIA_TYPE_VIDEO, | |
495 | .id = AV_CODEC_ID_DNXHD, | |
496 | .priv_data_size = sizeof(DNXHDContext), | |
497 | .init = dnxhd_decode_init, | |
498 | .close = dnxhd_decode_close, | |
499 | .decode = dnxhd_decode_frame, | |
500 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, | |
501 | }; |