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"
34 typedef struct DNXHDContext {
35 AVCodecContext *avctx;
38 int cid; ///< compression id
39 unsigned int width, height;
40 unsigned int mb_width, mb_height;
41 uint32_t mb_scan_index[68]; /* max for 1080p */
42 int cur_field; ///< current interlaced field
43 VLC ac_vlc, dc_vlc, run_vlc;
46 DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
48 const CIDEntry *cid_table;
49 int bit_depth; // 8, 10 or 0 if not initialized at all.
51 void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
55 #define DNXHD_VLC_BITS 9
56 #define DNXHD_DC_VLC_BITS 7
58 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
60 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
62 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
65 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
67 DNXHDContext *ctx = avctx->priv_data;
73 static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
75 if (cid != ctx->cid) {
78 if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
79 av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
80 return AVERROR(ENOSYS);
82 ctx->cid_table = &ff_dnxhd_cid_table[index];
84 ff_free_vlc(&ctx->ac_vlc);
85 ff_free_vlc(&ctx->dc_vlc);
86 ff_free_vlc(&ctx->run_vlc);
88 init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
89 ctx->cid_table->ac_bits, 1, 1,
90 ctx->cid_table->ac_codes, 2, 2, 0);
91 init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
92 ctx->cid_table->dc_bits, 1, 1,
93 ctx->cid_table->dc_codes, 1, 1, 0);
94 init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
95 ctx->cid_table->run_bits, 1, 1,
96 ctx->cid_table->run_codes, 2, 2, 0);
98 ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable,
105 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
106 const uint8_t *buf, int buf_size,
109 static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
110 static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
113 if (buf_size < 0x280)
114 return AVERROR_INVALIDDATA;
116 if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
117 av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n");
118 return AVERROR_INVALIDDATA;
120 if (buf[5] & 2) { /* interlaced */
121 ctx->cur_field = buf[5] & 1;
122 frame->interlaced_frame = 1;
123 frame->top_field_first = first_field ^ ctx->cur_field;
124 av_log(ctx->avctx, AV_LOG_DEBUG,
125 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
128 ctx->height = AV_RB16(buf + 0x18);
129 ctx->width = AV_RB16(buf + 0x1a);
131 av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
134 if (buf[0x4] == 0x2) {
135 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
136 ctx->avctx->bits_per_raw_sample = 10;
137 if (ctx->bit_depth != 10) {
138 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
139 ff_dsputil_init(&ctx->dsp, ctx->avctx);
141 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
144 } else if (buf[0x21] & 0x40) {
145 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
146 ctx->avctx->bits_per_raw_sample = 10;
147 if (ctx->bit_depth != 10) {
148 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
149 ff_dsputil_init(&ctx->dsp, ctx->avctx);
151 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
154 ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
155 ctx->avctx->bits_per_raw_sample = 8;
156 if (ctx->bit_depth != 8) {
157 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
158 ff_dsputil_init(&ctx->dsp, ctx->avctx);
160 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
164 cid = AV_RB32(buf + 0x28);
165 av_dlog(ctx->avctx, "compression id %d\n", cid);
167 if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
170 if (buf_size < ctx->cid_table->coding_unit_size) {
171 av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n");
172 return AVERROR_INVALIDDATA;
175 ctx->mb_width = ctx->width >> 4;
176 ctx->mb_height = buf[0x16d];
179 "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
181 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
184 if (ctx->mb_height > 68 ||
185 (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
186 av_log(ctx->avctx, AV_LOG_ERROR,
187 "mb height too big: %d\n", ctx->mb_height);
188 return AVERROR_INVALIDDATA;
191 for (i = 0; i < ctx->mb_height; i++) {
192 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
193 av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
194 if (buf_size < ctx->mb_scan_index[i] + 0x280) {
195 av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n");
196 return AVERROR_INVALIDDATA;
203 static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx,
204 int16_t *block, int n,
210 int i, j, index1, index2, len;
211 int level, component, sign;
212 const uint8_t *weight_matrix;
213 OPEN_READER(bs, &ctx->gb);
217 component = 1 + (n & 1);
218 weight_matrix = ctx->cid_table->chroma_weight;
221 weight_matrix = ctx->cid_table->luma_weight;
224 component = (n >> 1) % 3;
226 weight_matrix = ctx->cid_table->chroma_weight;
228 weight_matrix = ctx->cid_table->luma_weight;
232 UPDATE_CACHE(bs, &ctx->gb);
233 GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
235 level = GET_CACHE(bs, &ctx->gb);
236 LAST_SKIP_BITS(bs, &ctx->gb, len);
238 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
239 ctx->last_dc[component] += level;
241 block[0] = ctx->last_dc[component];
244 UPDATE_CACHE(bs, &ctx->gb);
245 GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
247 level = ctx->cid_table->ac_level[index1];
248 if (!level) /* EOB */
251 sign = SHOW_SBITS(bs, &ctx->gb, 1);
252 SKIP_BITS(bs, &ctx->gb, 1);
254 if (ctx->cid_table->ac_index_flag[index1]) {
255 level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 6;
256 SKIP_BITS(bs, &ctx->gb, index_bits);
259 if (ctx->cid_table->ac_run_flag[index1]) {
260 UPDATE_CACHE(bs, &ctx->gb);
261 GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
263 i += ctx->cid_table->run[index2];
267 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
271 j = ctx->scantable.permutated[i];
272 level = (2 * level + 1) * qscale * weight_matrix[i];
273 if (level_bias < 32 || weight_matrix[i] != level_bias)
275 level >>= level_shift;
277 block[j] = (level ^ sign) - sign;
280 CLOSE_READER(bs, &ctx->gb);
283 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
286 dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
289 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
292 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
295 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
298 dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
301 static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame,
304 int shift1 = ctx->bit_depth == 10;
305 int dct_linesize_luma = frame->linesize[0];
306 int dct_linesize_chroma = frame->linesize[1];
307 uint8_t *dest_y, *dest_u, *dest_v;
308 int dct_y_offset, dct_x_offset;
311 qscale = get_bits(&ctx->gb, 11);
312 skip_bits1(&ctx->gb);
314 for (i = 0; i < 8; i++) {
315 ctx->bdsp.clear_block(ctx->blocks[i]);
316 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
319 for (; i < 12; i++) {
320 ctx->bdsp.clear_block(ctx->blocks[i]);
321 ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
325 if (frame->interlaced_frame) {
326 dct_linesize_luma <<= 1;
327 dct_linesize_chroma <<= 1;
330 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
331 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
332 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
334 if (ctx->cur_field) {
335 dest_y += frame->linesize[0];
336 dest_u += frame->linesize[1];
337 dest_v += frame->linesize[2];
340 dct_y_offset = dct_linesize_luma << 3;
341 dct_x_offset = 8 << shift1;
343 ctx->dsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
344 ctx->dsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
345 ctx->dsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
346 ctx->dsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
348 if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
349 dct_y_offset = dct_linesize_chroma << 3;
350 ctx->dsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
351 ctx->dsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
352 ctx->dsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
353 ctx->dsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
356 ctx->dsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
357 ctx->dsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
358 ctx->dsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
359 ctx->dsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
361 if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
362 dct_y_offset = dct_linesize_chroma << 3;
363 ctx->dsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
364 ctx->dsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
365 ctx->dsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
366 ctx->dsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
367 ctx->dsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
368 ctx->dsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
369 ctx->dsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
370 ctx->dsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
377 static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame,
378 const uint8_t *buf, int buf_size)
381 for (y = 0; y < ctx->mb_height; y++) {
384 ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
385 init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
386 for (x = 0; x < ctx->mb_width; x++) {
388 dnxhd_decode_macroblock(ctx, frame, x, y);
389 //STOP_TIMER("decode macroblock");
395 static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
396 int *got_frame, AVPacket *avpkt)
398 const uint8_t *buf = avpkt->data;
399 int buf_size = avpkt->size;
400 DNXHDContext *ctx = avctx->priv_data;
401 AVFrame *picture = data;
405 av_dlog(avctx, "frame size %d\n", buf_size);
408 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
411 if ((avctx->width || avctx->height) &&
412 (ctx->width != avctx->width || ctx->height != avctx->height)) {
413 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
414 avctx->width, avctx->height, ctx->width, ctx->height);
418 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
423 if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) {
424 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
427 picture->pict_type = AV_PICTURE_TYPE_I;
428 picture->key_frame = 1;
431 dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280);
433 if (first_field && picture->interlaced_frame) {
434 buf += ctx->cid_table->coding_unit_size;
435 buf_size -= ctx->cid_table->coding_unit_size;
437 goto decode_coding_unit;
444 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
446 DNXHDContext *ctx = avctx->priv_data;
448 ff_free_vlc(&ctx->ac_vlc);
449 ff_free_vlc(&ctx->dc_vlc);
450 ff_free_vlc(&ctx->run_vlc);
454 AVCodec ff_dnxhd_decoder = {
456 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
457 .type = AVMEDIA_TYPE_VIDEO,
458 .id = AV_CODEC_ID_DNXHD,
459 .priv_data_size = sizeof(DNXHDContext),
460 .init = dnxhd_decode_init,
461 .close = dnxhd_decode_close,
462 .decode = dnxhd_decode_frame,
463 .capabilities = CODEC_CAP_DR1,