3 * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4 * Copyright (c) 2011 MirriAd Ltd
6 * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
8 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/imgutils.h"
26 #include "libavutil/timer.h"
30 #include "dnxhddata.h"
35 typedef struct DNXHDContext {
36 AVCodecContext *avctx;
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;
48 DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
50 const CIDEntry *cid_table;
51 int bit_depth; // 8, 10 or 0 if not initialized at all.
53 void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
60 #define DNXHD_VLC_BITS 9
61 #define DNXHD_DC_VLC_BITS 7
63 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
65 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
67 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
70 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
72 DNXHDContext *ctx = avctx->priv_data;
79 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid)
81 if (cid != ctx->cid) {
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);
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;
92 ctx->cid_table = &ff_dnxhd_cid_table[index];
94 ff_free_vlc(&ctx->ac_vlc);
95 ff_free_vlc(&ctx->dc_vlc);
96 ff_free_vlc(&ctx->run_vlc);
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);
108 ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
115 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
116 const uint8_t *buf, int buf_size,
119 static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
120 static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
123 if (buf_size < 0x280) {
124 av_log(ctx->avctx, AV_LOG_ERROR, "buffer too small (%d < 640).\n",
126 return AVERROR_INVALIDDATA;
129 if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
130 av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n");
131 return AVERROR_INVALIDDATA;
133 if (buf[5] & 2) { /* interlaced */
134 ctx->cur_field = buf[5] & 1;
135 frame->interlaced_frame = 1;
136 frame->top_field_first = first_field ^ ctx->cur_field;
137 av_log(ctx->avctx, AV_LOG_DEBUG,
138 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
143 ctx->height = AV_RB16(buf + 0x18);
144 ctx->width = AV_RB16(buf + 0x1a);
146 av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
148 if (!ctx->bit_depth) {
149 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
150 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
152 if (buf[0x21] == 0x58) { /* 10 bit */
153 ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 10;
155 if (buf[0x4] == 0x2) {
156 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
157 ctx->pix_fmt = AV_PIX_FMT_YUV444P10;
160 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
161 ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
164 } else if (buf[0x21] == 0x38) { /* 8 bit */
165 ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 8;
167 ctx->pix_fmt = AV_PIX_FMT_YUV422P;
169 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
171 av_log(ctx->avctx, AV_LOG_ERROR, "invalid bit depth value (%d).\n",
173 return AVERROR_INVALIDDATA;
176 cid = AV_RB32(buf + 0x28);
177 av_dlog(ctx->avctx, "compression id %d\n", cid);
179 if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
182 // make sure profile size constraints are respected
183 // DNx100 allows 1920->1440 and 1280->960 subsampling
184 if (ctx->width != ctx->cid_table->width) {
185 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
186 &ctx->avctx->sample_aspect_ratio.den,
187 ctx->width, ctx->cid_table->width, 255);
188 ctx->width = ctx->cid_table->width;
191 if (buf_size < ctx->cid_table->coding_unit_size) {
192 av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %d).\n",
193 buf_size, ctx->cid_table->coding_unit_size);
194 return AVERROR_INVALIDDATA;
197 ctx->mb_width = ctx->width >> 4;
198 ctx->mb_height = buf[0x16d];
201 "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
203 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
206 if (ctx->mb_height > 68 ||
207 (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
208 av_log(ctx->avctx, AV_LOG_ERROR,
209 "mb height too big: %d\n", ctx->mb_height);
210 return AVERROR_INVALIDDATA;
213 for (i = 0; i < ctx->mb_height; i++) {
214 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
215 av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
216 if (buf_size < ctx->mb_scan_index[i] + 0x280LL) {
217 av_log(ctx->avctx, AV_LOG_ERROR,
218 "invalid mb scan index (%d < %d).\n",
219 buf_size, ctx->mb_scan_index[i] + 0x280);
220 return AVERROR_INVALIDDATA;
227 static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx,
228 int16_t *block, int n,
234 int i, j, index1, index2, len, flags;
235 int level, component, sign;
237 const uint8_t *weight_matrix;
238 const uint8_t *ac_level = ctx->cid_table->ac_level;
239 const uint8_t *ac_flags = ctx->cid_table->ac_flags;
240 const int eob_index = ctx->cid_table->eob_index;
241 OPEN_READER(bs, &ctx->gb);
245 component = 1 + (n & 1);
246 scale = ctx->chroma_scale;
247 weight_matrix = ctx->cid_table->chroma_weight;
250 scale = ctx->luma_scale;
251 weight_matrix = ctx->cid_table->luma_weight;
254 component = (n >> 1) % 3;
256 scale = ctx->chroma_scale;
257 weight_matrix = ctx->cid_table->chroma_weight;
259 scale = ctx->luma_scale;
260 weight_matrix = ctx->cid_table->luma_weight;
264 UPDATE_CACHE(bs, &ctx->gb);
265 GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
267 level = GET_CACHE(bs, &ctx->gb);
268 LAST_SKIP_BITS(bs, &ctx->gb, len);
270 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
271 ctx->last_dc[component] += level;
273 block[0] = ctx->last_dc[component];
277 UPDATE_CACHE(bs, &ctx->gb);
278 GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
281 while (index1 != eob_index) {
282 level = ac_level[index1];
283 flags = ac_flags[index1];
285 sign = SHOW_SBITS(bs, &ctx->gb, 1);
286 SKIP_BITS(bs, &ctx->gb, 1);
289 level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 7;
290 SKIP_BITS(bs, &ctx->gb, index_bits);
294 UPDATE_CACHE(bs, &ctx->gb);
295 GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
297 i += ctx->cid_table->run[index2];
301 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
305 j = ctx->scantable.permutated[i];
307 if (level_bias < 32 || weight_matrix[i] != level_bias)
309 level >>= level_shift;
311 block[j] = (level ^ sign) - sign;
313 UPDATE_CACHE(bs, &ctx->gb);
314 GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
318 CLOSE_READER(bs, &ctx->gb);
321 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
324 dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
327 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
330 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
333 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
336 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
339 static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame,
342 int shift1 = ctx->bit_depth == 10;
343 int dct_linesize_luma = frame->linesize[0];
344 int dct_linesize_chroma = frame->linesize[1];
345 uint8_t *dest_y, *dest_u, *dest_v;
346 int dct_y_offset, dct_x_offset;
349 qscale = get_bits(&ctx->gb, 11);
350 skip_bits1(&ctx->gb);
352 if (qscale != ctx->last_qscale) {
353 for (i = 0; i < 64; i++) {
354 ctx->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
355 ctx->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
357 ctx->last_qscale = qscale;
360 for (i = 0; i < 8; i++) {
361 ctx->bdsp.clear_block(ctx->blocks[i]);
362 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
365 for (; i < 12; i++) {
366 ctx->bdsp.clear_block(ctx->blocks[i]);
367 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
371 if (frame->interlaced_frame) {
372 dct_linesize_luma <<= 1;
373 dct_linesize_chroma <<= 1;
376 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
377 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
378 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
380 if (frame->interlaced_frame && ctx->cur_field) {
381 dest_y += frame->linesize[0];
382 dest_u += frame->linesize[1];
383 dest_v += frame->linesize[2];
386 dct_y_offset = dct_linesize_luma << 3;
387 dct_x_offset = 8 << shift1;
389 ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
390 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
391 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
392 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
394 if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
395 dct_y_offset = dct_linesize_chroma << 3;
396 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
397 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
398 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
399 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
402 ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
403 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
404 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
405 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
407 if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
408 dct_y_offset = dct_linesize_chroma << 3;
409 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
410 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
411 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
412 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
413 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
414 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
415 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
416 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
423 static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame,
424 const uint8_t *buf, int buf_size)
427 for (y = 0; y < ctx->mb_height; y++) {
430 ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
431 init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
432 for (x = 0; x < ctx->mb_width; x++) {
434 dnxhd_decode_macroblock(ctx, frame, x, y);
435 //STOP_TIMER("decode macroblock");
441 static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
442 int *got_frame, AVPacket *avpkt)
444 const uint8_t *buf = avpkt->data;
445 int buf_size = avpkt->size;
446 DNXHDContext *ctx = avctx->priv_data;
447 ThreadFrame frame = { .f = data };
448 AVFrame *picture = data;
452 av_dlog(avctx, "frame size %d\n", buf_size);
455 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
458 if ((avctx->width || avctx->height) &&
459 (ctx->width != avctx->width || ctx->height != avctx->height)) {
460 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
461 avctx->width, avctx->height, ctx->width, ctx->height);
464 if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
465 av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
466 av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
470 avctx->pix_fmt = ctx->pix_fmt;
471 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
476 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
478 picture->pict_type = AV_PICTURE_TYPE_I;
479 picture->key_frame = 1;
482 dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280);
484 if (first_field && picture->interlaced_frame) {
485 buf += ctx->cid_table->coding_unit_size;
486 buf_size -= ctx->cid_table->coding_unit_size;
488 goto decode_coding_unit;
495 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
497 DNXHDContext *ctx = avctx->priv_data;
499 ff_free_vlc(&ctx->ac_vlc);
500 ff_free_vlc(&ctx->dc_vlc);
501 ff_free_vlc(&ctx->run_vlc);
505 AVCodec ff_dnxhd_decoder = {
507 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
508 .type = AVMEDIA_TYPE_VIDEO,
509 .id = AV_CODEC_ID_DNXHD,
510 .priv_data_size = sizeof(DNXHDContext),
511 .init = dnxhd_decode_init,
512 .close = dnxhd_decode_close,
513 .decode = dnxhd_decode_frame,
514 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,