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 Libav.
10 * Libav 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 * Libav 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 Libav; 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 int cid; ///< compression id
40 unsigned int width, height;
41 unsigned int mb_width, mb_height;
42 uint32_t mb_scan_index[68]; /* max for 1080p */
43 int cur_field; ///< current interlaced field
44 VLC ac_vlc, dc_vlc, run_vlc;
47 DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
49 const CIDEntry *cid_table;
50 int bit_depth; // 8, 10 or 0 if not initialized at all.
53 void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
57 #define DNXHD_VLC_BITS 9
58 #define DNXHD_DC_VLC_BITS 7
60 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
62 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
64 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
67 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
69 DNXHDContext *ctx = avctx->priv_data;
75 static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
77 if (cid != ctx->cid) {
80 if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
81 av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
82 return AVERROR(ENOSYS);
84 ctx->cid_table = &ff_dnxhd_cid_table[index];
85 av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %d.\n", cid);
87 ff_free_vlc(&ctx->ac_vlc);
88 ff_free_vlc(&ctx->dc_vlc);
89 ff_free_vlc(&ctx->run_vlc);
91 init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
92 ctx->cid_table->ac_bits, 1, 1,
93 ctx->cid_table->ac_codes, 2, 2, 0);
94 init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
95 ctx->cid_table->dc_bits, 1, 1,
96 ctx->cid_table->dc_codes, 1, 1, 0);
97 init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
98 ctx->cid_table->run_bits, 1, 1,
99 ctx->cid_table->run_codes, 2, 2, 0);
101 ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
108 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
109 const uint8_t *buf, int buf_size,
112 static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
113 static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
115 int old_bit_depth = ctx->bit_depth;
117 if (buf_size < 0x280) {
118 av_log(ctx->avctx, AV_LOG_ERROR, "buffer too small (%d < 640).\n",
120 return AVERROR_INVALIDDATA;
123 if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
124 av_log(ctx->avctx, AV_LOG_ERROR,
125 "unknown header 0x%02"PRIX8" 0x%02"PRIX8" 0x%02"PRIX8" 0x%02"PRIX8" 0x%02"PRIX8"\n",
126 buf[0], buf[1], buf[2], buf[3], buf[4]);
127 return AVERROR_INVALIDDATA;
129 if (buf[5] & 2) { /* interlaced */
130 ctx->cur_field = buf[5] & 1;
131 frame->interlaced_frame = 1;
132 frame->top_field_first = first_field ^ ctx->cur_field;
133 av_log(ctx->avctx, AV_LOG_DEBUG,
134 "interlaced %"PRId8", cur field %d\n", buf[5] & 3, ctx->cur_field);
136 ctx->mbaff = buf[0x6] & 32;
138 ctx->height = AV_RB16(buf + 0x18);
139 ctx->width = AV_RB16(buf + 0x1a);
141 ff_dlog(ctx->avctx, "width %u, height %u\n", ctx->width, ctx->height);
143 if (buf[0x21] == 0x58) { /* 10 bit */
144 ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 10;
146 if (buf[0x4] == 0x2) {
147 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
148 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
151 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
152 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
154 } else if (buf[0x21] == 0x38) { /* 8 bit */
155 ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 8;
157 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
158 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
160 av_log(ctx->avctx, AV_LOG_ERROR, "invalid bit depth value (%"PRId8").\n",
162 return AVERROR_INVALIDDATA;
164 if (ctx->bit_depth != old_bit_depth) {
165 ff_blockdsp_init(&ctx->bdsp);
166 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
169 cid = AV_RB32(buf + 0x28);
170 ff_dlog(ctx->avctx, "compression id %d\n", cid);
172 if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
174 if (ctx->mbaff && ctx->cid_table->cid != 1260)
175 av_log(ctx->avctx, AV_LOG_WARNING,
176 "Adaptive MB interlace flag in an unsupported profile.\n");
178 // make sure profile size constraints are respected
179 // DNx100 allows 1920->1440 and 1280->960 subsampling
180 if (ctx->width != ctx->cid_table->width) {
181 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
182 &ctx->avctx->sample_aspect_ratio.den,
183 ctx->width, ctx->cid_table->width, 255);
184 ctx->width = ctx->cid_table->width;
187 if (buf_size < ctx->cid_table->coding_unit_size) {
188 av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
189 buf_size, ctx->cid_table->coding_unit_size);
190 return AVERROR_INVALIDDATA;
193 ctx->mb_width = ctx->width >> 4;
194 ctx->mb_height = buf[0x16d];
197 "mb width %u, mb height %u\n", ctx->mb_width, ctx->mb_height);
199 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
202 if (ctx->mb_height > 68 ||
203 (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
204 av_log(ctx->avctx, AV_LOG_ERROR,
205 "mb height too big: %u\n", ctx->mb_height);
206 return AVERROR_INVALIDDATA;
209 for (i = 0; i < ctx->mb_height; i++) {
210 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
211 ff_dlog(ctx->avctx, "mb scan index %"PRIu32"\n", ctx->mb_scan_index[i]);
212 if (buf_size < ctx->mb_scan_index[i] + 0x280) {
213 av_log(ctx->avctx, AV_LOG_ERROR,
214 "invalid mb scan index (%d < %"PRIu32").\n",
215 buf_size, ctx->mb_scan_index[i] + 0x280);
216 return AVERROR_INVALIDDATA;
223 static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx,
224 int16_t *block, int n,
230 int i, j, index1, index2, len;
231 int level, component, sign;
232 const uint8_t *weight_matrix;
233 OPEN_READER(bs, &ctx->gb);
237 component = 1 + (n & 1);
238 weight_matrix = ctx->cid_table->chroma_weight;
241 weight_matrix = ctx->cid_table->luma_weight;
244 component = (n >> 1) % 3;
246 weight_matrix = ctx->cid_table->chroma_weight;
248 weight_matrix = ctx->cid_table->luma_weight;
252 UPDATE_CACHE(bs, &ctx->gb);
253 GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
255 level = GET_CACHE(bs, &ctx->gb);
256 LAST_SKIP_BITS(bs, &ctx->gb, len);
258 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
259 ctx->last_dc[component] += level;
261 block[0] = ctx->last_dc[component];
264 UPDATE_CACHE(bs, &ctx->gb);
265 GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
267 level = ctx->cid_table->ac_level[index1];
268 if (!level) /* EOB */
271 sign = SHOW_SBITS(bs, &ctx->gb, 1);
272 SKIP_BITS(bs, &ctx->gb, 1);
274 if (ctx->cid_table->ac_index_flag[index1]) {
275 level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 6;
276 SKIP_BITS(bs, &ctx->gb, index_bits);
279 if (ctx->cid_table->ac_run_flag[index1]) {
280 UPDATE_CACHE(bs, &ctx->gb);
281 GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
283 i += ctx->cid_table->run[index2];
287 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
291 j = ctx->scantable.permutated[i];
292 level = (2 * level + 1) * qscale * weight_matrix[i];
293 if (level_bias < 32 || weight_matrix[i] != level_bias)
295 level >>= level_shift;
297 block[j] = (level ^ sign) - sign;
300 CLOSE_READER(bs, &ctx->gb);
303 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
306 dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
309 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
312 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
315 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
318 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
321 static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame,
324 int shift1 = ctx->bit_depth == 10;
325 int dct_linesize_luma = frame->linesize[0];
326 int dct_linesize_chroma = frame->linesize[1];
327 uint8_t *dest_y, *dest_u, *dest_v;
328 int dct_y_offset, dct_x_offset;
330 int interlaced_mb = 0;
333 interlaced_mb = get_bits1(&ctx->gb);
334 qscale = get_bits(&ctx->gb, 10);
336 qscale = get_bits(&ctx->gb, 11);
338 skip_bits1(&ctx->gb);
340 for (i = 0; i < 8; i++) {
341 ctx->bdsp.clear_block(ctx->blocks[i]);
342 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
345 for (; i < 12; i++) {
346 ctx->bdsp.clear_block(ctx->blocks[i]);
347 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
351 if (frame->interlaced_frame) {
352 dct_linesize_luma <<= 1;
353 dct_linesize_chroma <<= 1;
356 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
357 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
358 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
360 if (ctx->cur_field) {
361 dest_y += frame->linesize[0];
362 dest_u += frame->linesize[1];
363 dest_v += frame->linesize[2];
366 dct_linesize_luma <<= 1;
367 dct_linesize_chroma <<= 1;
370 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
371 dct_x_offset = 8 << shift1;
373 ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
374 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
375 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
376 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
378 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
379 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
380 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
381 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
382 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
383 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
386 ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
387 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
388 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
389 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
391 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
392 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
393 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
394 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
395 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
396 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
397 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
398 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
399 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
400 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
407 static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame,
408 const uint8_t *buf, int buf_size)
411 for (y = 0; y < ctx->mb_height; y++) {
414 ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
415 init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
416 for (x = 0; x < ctx->mb_width; x++) {
418 dnxhd_decode_macroblock(ctx, frame, x, y);
419 //STOP_TIMER("decode macroblock");
425 static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
426 int *got_frame, AVPacket *avpkt)
428 const uint8_t *buf = avpkt->data;
429 int buf_size = avpkt->size;
430 DNXHDContext *ctx = avctx->priv_data;
437 ff_dlog(avctx, "frame size %d\n", buf_size);
440 if ((ret = dnxhd_decode_header(ctx, tf.f, buf, buf_size, first_field)) < 0)
443 if ((avctx->width || avctx->height) &&
444 (ctx->width != avctx->width || ctx->height != avctx->height)) {
445 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
446 avctx->width, avctx->height, ctx->width, ctx->height);
450 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
455 if ((ret = ff_thread_get_buffer(avctx, &tf, 0)) < 0) {
456 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
459 tf.f->pict_type = AV_PICTURE_TYPE_I;
463 dnxhd_decode_macroblocks(ctx, tf.f, buf + 0x280, buf_size - 0x280);
465 if (first_field && tf.f->interlaced_frame) {
466 buf += ctx->cid_table->coding_unit_size;
467 buf_size -= ctx->cid_table->coding_unit_size;
469 goto decode_coding_unit;
476 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
478 DNXHDContext *ctx = avctx->priv_data;
480 ff_free_vlc(&ctx->ac_vlc);
481 ff_free_vlc(&ctx->dc_vlc);
482 ff_free_vlc(&ctx->run_vlc);
486 AVCodec ff_dnxhd_decoder = {
488 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
489 .type = AVMEDIA_TYPE_VIDEO,
490 .id = AV_CODEC_ID_DNXHD,
491 .priv_data_size = sizeof(DNXHDContext),
492 .init = dnxhd_decode_init,
493 .close = dnxhd_decode_close,
494 .decode = dnxhd_decode_frame,
495 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,