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 AVFrame out_pic;

49 int end_of_stream;

50 float crf;

51 int cqp;

52 int b_bias;

53 float cplxblur;

54 int direct_pred;

55 int aud;

56 int fast_pskip;

57 int mbtree;

58 int mixed_refs;

60 int64_t *pts_buffer;

61 int out_frame_count;

62 } XavsContext;

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

65 {

66 static const int level_map[] = {

67 [XAVS_LOG_ERROR] = AV_LOG_ERROR,

68 [XAVS_LOG_WARNING] = AV_LOG_WARNING,

69 [XAVS_LOG_INFO] = AV_LOG_INFO,

70 [XAVS_LOG_DEBUG] = AV_LOG_DEBUG

71 };

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

74 return;

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

77 }

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

80 xavs_nal_t *nals, int nnal)

81 {

82 XavsContext *x4 = ctx->priv_data;

83 uint8_t *p;

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

86 if (!nnal)

87 return 0;

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

90 size += nals[i].i_payload;

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

93 return ret;

94 p = pkt->data;

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

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

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

99 p += x4->sei_size;

100 x4->sei_size = 0;

101 }

102

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

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

105 if (s < 0)

106 return -1;

107 p += s;

108 }

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

110

111 return 1;

112 }

113

114 static int XAVS_frame(AVCodecContext *ctx, AVPacket *pkt,

115 const AVFrame *frame, int *got_packet)

116 {

117 XavsContext *x4 = ctx->priv_data;

118 xavs_nal_t *nal;

119 int nnal, i, ret;

120 xavs_picture_t pic_out;

121

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

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

124

125 if (frame) {

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

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

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

129 }

130

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

132 x4->pic.i_type = XAVS_TYPE_AUTO;

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

134 }

135

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

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

138 return -1;

139

140 ret = encode_nals(ctx, pkt, nal, nnal);

141

142 if (ret < 0)

143 return -1;

144

145 if (!ret) {

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

147 if ((ret = ff_alloc_packet2(ctx, pkt, 4)) < 0)

148 return ret;

149

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

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

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

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

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

155 x4->pts_buffer[(x4->out_frame_count-2)%(ctx->max_b_frames+1)];

156 x4->end_of_stream = END_OF_STREAM;

157 *got_packet = 1;

158 }

159 return 0;

160 }

161

162 x4->out_pic.pts = pic_out.i_pts;

163 pkt->pts = pic_out.i_pts;

164 if (ctx->has_b_frames) {

165 if (!x4->out_frame_count)

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

167 else

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

169 } else

170 pkt->dts = pkt->pts;

171

172 switch (pic_out.i_type) {

173 case XAVS_TYPE_IDR:

174 case XAVS_TYPE_I:

175 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

176 break;

177 case XAVS_TYPE_P:

178 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

179 break;

180 case XAVS_TYPE_B:

181 case XAVS_TYPE_BREF:

182 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

183 break;

184 }

185

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

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

188 if (pic_out.i_type == XAVS_TYPE_I) {

189 x4->out_pic.key_frame = 1;

190 pkt->flags |= AV_PKT_FLAG_KEY;

191 }

192

193 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

194

195 x4->out_frame_count++;

196 *got_packet = ret;

197 return 0;

198 }

199

200 static av_cold int XAVS_close(AVCodecContext *avctx)

201 {

202 XavsContext *x4 = avctx->priv_data;

203

204 av_freep(&avctx->extradata);

205 av_free(x4->sei);

206 av_freep(&x4->pts_buffer);

207

208 if (x4->enc)

209 xavs_encoder_close(x4->enc);

210

211 return 0;

212 }

213

214 static av_cold int XAVS_init(AVCodecContext *avctx)

215 {

216 XavsContext *x4 = avctx->priv_data;

217

218 x4->sei_size = 0;

219 xavs_param_default(&x4->params);

220

221 x4->params.pf_log = XAVS_log;

222 x4->params.p_log_private = avctx;

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

224 if (avctx->bit_rate) {

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

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

227 }

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

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

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

231 if (avctx->flags & CODEC_FLAG_PASS2) {

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

233 } else {

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

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

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

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

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

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

240 }

241 }

242

243 if (x4->aud >= 0)

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

245 if (x4->mbtree >= 0)

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

247 if (x4->direct_pred >= 0)

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

249 if (x4->fast_pskip >= 0)

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

251 if (x4->mixed_refs >= 0)

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

253 if (x4->b_bias != INT_MIN)

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

255 if (x4->cplxblur >= 0)

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

257

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

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

260 x4->params.b_cabac = 0;

261

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

263

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

265

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

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

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

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

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

271

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

273

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

275

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

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

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

279

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

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

282

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

284

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

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

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

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

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

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

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

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

293

294 switch (avctx->me_method) {

295 case ME_EPZS:

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

297 break;

298 case ME_HEX:

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

300 break;

301 case ME_UMH:

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

303 break;

304 case ME_FULL:

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

306 break;

307 case ME_TESA:

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

309 break;

310 default:

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

312 }

313

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

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

316

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

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

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

320

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

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

323

324 if (avctx->level > 0)

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

326

327 x4->params.rc.f_rate_tolerance =

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

329

330 if ((avctx->rc_buffer_size) &&

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

332 x4->params.rc.f_vbv_buffer_init =

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

334 } else

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

336

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

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

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

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

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

342

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

344 x4->params.i_log_level = XAVS_LOG_DEBUG;

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

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

347

348 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

349 x4->params.b_repeat_headers = 0;

350

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

352 if (!x4->enc)

353 return -1;

354

355 if (!(x4->pts_buffer = av_mallocz((avctx->max_b_frames+1) * sizeof(*x4->pts_buffer))))

356 return AVERROR(ENOMEM);

357

358 avctx->coded_frame = &x4->out_pic;

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

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

361 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {

362 xavs_nal_t *nal;

363 int nnal, s, i, size;

364 uint8_t *p;

365

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

367

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

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

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

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

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

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

374 return -1;

375

376 continue;

377 }

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

379 if (size < 0)

380 return -1;

381 p += size;

382 }

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

384 }

385 return 0;

386 }

387

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

389 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

390 static const AVOption options[] = {

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

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

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

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

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

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

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

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

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

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

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

402 { "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 },

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

404 { NULL },

405 };

406

407 static const AVClass xavs_class = {

408 .class_name = "libxavs",

409 .item_name = av_default_item_name,

410 .option = options,

411 .version = LIBAVUTIL_VERSION_INT,

412 };

413

414 static const AVCodecDefault xavs_defaults[] = {

415 { "b", "0" },

416 { NULL },

417 };

418

419 AVCodec ff_libxavs_encoder = {

420 .name = "libxavs",

421 .type = AVMEDIA_TYPE_VIDEO,

422 .id = AV_CODEC_ID_CAVS,

423 .priv_data_size = sizeof(XavsContext),

424 .init = XAVS_init,

425 .encode2 = XAVS_frame,

426 .close = XAVS_close,

427 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

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

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

430 .priv_class = &xavs_class,

431 .defaults = xavs_defaults,

432 };

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