FFmpeg: libavcodec/libxavs.c Source File

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libxavs.c

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1 /*

2 * AVS encoding using the xavs library

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 */

22 #include <stdio.h>

23 #include <stdlib.h>

24 #include <string.h>

25 #include <math.h>

26 #include <stdint.h>

27 #include <float.h>

28 #include <xavs.h>

29 #include "avcodec.h"

30 #include "internal.h"

31 #include "libavutil/internal.h"

32 #include "libavutil/mem.h"

33 #include "libavutil/opt.h"

35 #define END_OF_STREAM 0x001

37 #define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */

38 #define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */

39 #define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/

41 typedef struct XavsContext {

42 AVClass *class;

43 xavs_param_t params;

44 xavs_t *enc;

45 xavs_picture_t pic;

46 uint8_t *sei;

47 int sei_size;

48 int end_of_stream;

49 float crf;

50 int cqp;

51 int b_bias;

52 float cplxblur;

53 int direct_pred;

54 int aud;

55 int fast_pskip;

56 int mbtree;

57 int mixed_refs;

59 int64_t *pts_buffer;

60 int out_frame_count;

61 } XavsContext;

63 static void XAVS_log(void *p, int level, const char *fmt, va_list args)

64 {

65 static const int level_map[] = {

66 [XAVS_LOG_ERROR] = AV_LOG_ERROR,

67 [XAVS_LOG_WARNING] = AV_LOG_WARNING,

68 [XAVS_LOG_INFO] = AV_LOG_INFO,

69 [XAVS_LOG_DEBUG] = AV_LOG_DEBUG

70 };

72 if (level < 0 || level > XAVS_LOG_DEBUG)

73 return;

75 av_vlog(p, level_map[level], fmt, args);

76 }

78 static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,

79 xavs_nal_t *nals, int nnal)

80 {

81 XavsContext *x4 = ctx->priv_data;

82 uint8_t *p;

83 int i, s, ret, size = x4->sei_size + FF_MIN_BUFFER_SIZE;

85 if (!nnal)

86 return 0;

88 for (i = 0; i < nnal; i++)

89 size += nals[i].i_payload;

91 if ((ret = ff_alloc_packet2(ctx, pkt, size)) < 0)

92 return ret;

93 p = pkt->data;

95 /* Write the SEI as part of the first frame. */

96 if (x4->sei_size > 0 && nnal > 0) {

97 memcpy(p, x4->sei, x4->sei_size);

98 p += x4->sei_size;

99 x4->sei_size = 0;

100 }

101

102 for (i = 0; i < nnal; i++) {

103 s = xavs_nal_encode(p, &size, 1, nals + i);

104 if (s < 0)

105 return -1;

106 p += s;

107 }

108 pkt->size = p - pkt->data;

109

110 return 1;

111 }

112

113 static int XAVS_frame(AVCodecContext *avctx, AVPacket *pkt,

114 const AVFrame *frame, int *got_packet)

115 {

116 XavsContext *x4 = avctx->priv_data;

117 xavs_nal_t *nal;

118 int nnal, i, ret;

119 xavs_picture_t pic_out;

120

121 x4->pic.img.i_csp = XAVS_CSP_I420;

122 x4->pic.img.i_plane = 3;

123

124 if (frame) {

125 for (i = 0; i < 3; i++) {

126 x4->pic.img.plane[i] = frame->data[i];

127 x4->pic.img.i_stride[i] = frame->linesize[i];

128 }

129

130 x4->pic.i_pts = frame->pts;

131 x4->pic.i_type = XAVS_TYPE_AUTO;

132 x4->pts_buffer[avctx->frame_number % (avctx->max_b_frames+1)] = frame->pts;

133 }

134

135 if (xavs_encoder_encode(x4->enc, &nal, &nnal,

136 frame? &x4->pic: NULL, &pic_out) < 0)

137 return -1;

138

139 ret = encode_nals(avctx, pkt, nal, nnal);

140

141 if (ret < 0)

142 return -1;

143

144 if (!ret) {

145 if (!frame && !(x4->end_of_stream)) {

146 if ((ret = ff_alloc_packet2(avctx, pkt, 4)) < 0)

147 return ret;

148

149 pkt->data[0] = 0x0;

150 pkt->data[1] = 0x0;

151 pkt->data[2] = 0x01;

152 pkt->data[3] = 0xb1;

153 pkt->dts = 2*x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)] -

154 x4->pts_buffer[(x4->out_frame_count-2)%(avctx->max_b_frames+1)];

155 x4->end_of_stream = END_OF_STREAM;

156 *got_packet = 1;

157 }

158 return 0;

159 }

160

161 avctx->coded_frame->pts = pic_out.i_pts;

162 pkt->pts = pic_out.i_pts;

163 if (avctx->has_b_frames) {

164 if (!x4->out_frame_count)

165 pkt->dts = pkt->pts - (x4->pts_buffer[1] - x4->pts_buffer[0]);

166 else

167 pkt->dts = x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)];

168 } else

169 pkt->dts = pkt->pts;

170

171 switch (pic_out.i_type) {

172 case XAVS_TYPE_IDR:

173 case XAVS_TYPE_I:

174 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

175 break;

176 case XAVS_TYPE_P:

177 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;

178 break;

179 case XAVS_TYPE_B:

180 case XAVS_TYPE_BREF:

181 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;

182 break;

183 }

184

185 /* There is no IDR frame in AVS JiZhun */

186 /* Sequence header is used as a flag */

187 if (pic_out.i_type == XAVS_TYPE_I) {

188 avctx->coded_frame->key_frame = 1;

189 pkt->flags |= AV_PKT_FLAG_KEY;

190 }

191

192 avctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

193

194 x4->out_frame_count++;

195 *got_packet = ret;

196 return 0;

197 }

198

199 static av_cold int XAVS_close(AVCodecContext *avctx)

200 {

201 XavsContext *x4 = avctx->priv_data;

202

203 av_freep(&avctx->extradata);

204 av_freep(&x4->sei);

205 av_freep(&x4->pts_buffer);

206

207 if (x4->enc)

208 xavs_encoder_close(x4->enc);

209

210 av_frame_free(&avctx->coded_frame);

211

212 return 0;

213 }

214

215 static av_cold int XAVS_init(AVCodecContext *avctx)

216 {

217 XavsContext *x4 = avctx->priv_data;

218

219 x4->sei_size = 0;

220 xavs_param_default(&x4->params);

221

222 x4->params.pf_log = XAVS_log;

223 x4->params.p_log_private = avctx;

224 x4->params.i_keyint_max = avctx->gop_size;

225 if (avctx->bit_rate) {

226 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;

227 x4->params.rc.i_rc_method = XAVS_RC_ABR;

228 }

229 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;

230 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;

231 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;

232 if (avctx->flags & CODEC_FLAG_PASS2) {

233 x4->params.rc.b_stat_read = 1;

234 } else {

235 if (x4->crf >= 0) {

236 x4->params.rc.i_rc_method = XAVS_RC_CRF;

237 x4->params.rc.f_rf_constant = x4->crf;

238 } else if (x4->cqp >= 0) {

239 x4->params.rc.i_rc_method = XAVS_RC_CQP;

240 x4->params.rc.i_qp_constant = x4->cqp;

241 }

242 }

243

244 if (x4->aud >= 0)

245 x4->params.b_aud = x4->aud;

246 if (x4->mbtree >= 0)

247 x4->params.rc.b_mb_tree = x4->mbtree;

248 if (x4->direct_pred >= 0)

249 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;

250 if (x4->fast_pskip >= 0)

251 x4->params.analyse.b_fast_pskip = x4->fast_pskip;

252 if (x4->mixed_refs >= 0)

253 x4->params.analyse.b_mixed_references = x4->mixed_refs;

254 if (x4->b_bias != INT_MIN)

255 x4->params.i_bframe_bias = x4->b_bias;

256 if (x4->cplxblur >= 0)

257 x4->params.rc.f_complexity_blur = x4->cplxblur;

258

259 x4->params.i_bframe = avctx->max_b_frames;

260 /* cabac is not included in AVS JiZhun Profile */

261 x4->params.b_cabac = 0;

262

263 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;

264

265 avctx->has_b_frames = !!avctx->max_b_frames;

266

267 /* AVS doesn't allow B picture as reference */

268 /* The max allowed reference frame number of B is 2 */

269 x4->params.i_keyint_min = avctx->keyint_min;

270 if (x4->params.i_keyint_min > x4->params.i_keyint_max)

271 x4->params.i_keyint_min = x4->params.i_keyint_max;

272

273 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;

274

275 // x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;

276

277 x4->params.rc.i_qp_min = avctx->qmin;

278 x4->params.rc.i_qp_max = avctx->qmax;

279 x4->params.rc.i_qp_step = avctx->max_qdiff;

280

281 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */

282 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */

283

284 x4->params.i_frame_reference = avctx->refs;

285

286 x4->params.i_width = avctx->width;

287 x4->params.i_height = avctx->height;

288 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;

289 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;

290 /* This is only used for counting the fps */

291 x4->params.i_fps_num = avctx->time_base.den;

292 x4->params.i_fps_den = avctx->time_base.num;

293 x4->params.analyse.inter = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16;

294

295 switch (avctx->me_method) {

296 case ME_EPZS:

297 x4->params.analyse.i_me_method = XAVS_ME_DIA;

298 break;

299 case ME_HEX:

300 x4->params.analyse.i_me_method = XAVS_ME_HEX;

301 break;

302 case ME_UMH:

303 x4->params.analyse.i_me_method = XAVS_ME_UMH;

304 break;

305 case ME_FULL:

306 x4->params.analyse.i_me_method = XAVS_ME_ESA;

307 break;

308 case ME_TESA:

309 x4->params.analyse.i_me_method = XAVS_ME_TESA;

310 break;

311 default:

312 x4->params.analyse.i_me_method = XAVS_ME_HEX;

313 }

314

315 x4->params.analyse.i_me_range = avctx->me_range;

316 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;

317

318 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;

319 /* AVS P2 only enables 8x8 transform */

320 x4->params.analyse.b_transform_8x8 = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT;

321

322 x4->params.analyse.i_trellis = avctx->trellis;

323 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;

324

325 if (avctx->level > 0)

326 x4->params.i_level_idc = avctx->level;

327

328 if (avctx->bit_rate > 0)

329 x4->params.rc.f_rate_tolerance =

330 (float)avctx->bit_rate_tolerance/avctx->bit_rate;

331

332 if ((avctx->rc_buffer_size) &&

333 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {

334 x4->params.rc.f_vbv_buffer_init =

335 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;

336 } else

337 x4->params.rc.f_vbv_buffer_init = 0.9;

338

339 /* TAG:do we have MB tree RC method */

340 /* what is the RC method we are now using? Default NO */

341 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);

342 x4->params.rc.f_pb_factor = avctx->b_quant_factor;

343 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;

344

345 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;

346 x4->params.i_log_level = XAVS_LOG_DEBUG;

347 x4->params.i_threads = avctx->thread_count;

348 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;

349

350 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

351 x4->params.b_repeat_headers = 0;

352

353 x4->enc = xavs_encoder_open(&x4->params);

354 if (!x4->enc)

355 return -1;

356

357 if (!(x4->pts_buffer = av_mallocz_array((avctx->max_b_frames+1), sizeof(*x4->pts_buffer))))

358 return AVERROR(ENOMEM);

359

360 avctx->coded_frame = av_frame_alloc();

361 if (!avctx->coded_frame)

362 return AVERROR(ENOMEM);

363

364 /* TAG: Do we have GLOBAL HEADER in AVS */

365 /* We Have PPS and SPS in AVS */

366 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER && 0) {

367 xavs_nal_t *nal;

368 int nnal, s, i, size;

369 uint8_t *p;

370

371 s = xavs_encoder_headers(x4->enc, &nal, &nnal);

372

373 avctx->extradata = p = av_malloc(s);

374 for (i = 0; i < nnal; i++) {

375 /* Don't put the SEI in extradata. */

376 if (nal[i].i_type == NAL_SEI) {

377 x4->sei = av_malloc( 5 + nal[i].i_payload * 4 / 3 );

378 if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nal + i) < 0)

379 return -1;

380

381 continue;

382 }

383 size = xavs_nal_encode(p, &s, 1, nal + i);

384 if (size < 0)

385 return -1;

386 p += size;

387 }

388 avctx->extradata_size = p - avctx->extradata;

389 }

390 return 0;

391 }

392

393 #define OFFSET(x) offsetof(XavsContext, x)

394 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

395 static const AVOption options[] = {

396 { "crf", "Select the quality for constant quality mode", OFFSET(crf), AV_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, VE },

397 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, INT_MAX, VE },

398 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), AV_OPT_TYPE_INT, {.i64 = INT_MIN}, INT_MIN, INT_MAX, VE },

399 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, VE},

400 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },

401 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },

402 { "spatial", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },

403 { "temporal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },

404 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },

405 { "aud", "Use access unit delimiters.", OFFSET(aud), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE},

406 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE},

407 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE },

408 { "fast-pskip", NULL, OFFSET(fast_pskip), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE},

409 { NULL },

410 };

411

412 static const AVClass xavs_class = {

413 .class_name = "libxavs",

414 .item_name = av_default_item_name,

415 .option = options,

416 .version = LIBAVUTIL_VERSION_INT,

417 };

418

419 static const AVCodecDefault xavs_defaults[] = {

420 { "b", "0" },

421 { NULL },

422 };

423

424 AVCodec ff_libxavs_encoder = {

425 .name = "libxavs",

426 .long_name = NULL_IF_CONFIG_SMALL("libxavs Chinese AVS (Audio Video Standard)"),

427 .type = AVMEDIA_TYPE_VIDEO,

428 .id = AV_CODEC_ID_CAVS,

429 .priv_data_size = sizeof(XavsContext),

430 .init = XAVS_init,

431 .encode2 = XAVS_frame,

432 .close = XAVS_close,

433 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

434 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },

435 .priv_class = &xavs_class,

436 .defaults = xavs_defaults,

437 };

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