Libav 0.7.1
|
00001 /* 00002 * AVS encoding using the xavs library 00003 * Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com> 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include <stdio.h> 00023 #include <stdlib.h> 00024 #include <string.h> 00025 #include <math.h> 00026 #include <stdint.h> 00027 #include <xavs.h> 00028 #include "avcodec.h" 00029 00030 #define END_OF_STREAM 0x001 00031 00032 #define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */ 00033 #define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */ 00034 #define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/ 00035 00036 typedef struct XavsContext { 00037 xavs_param_t params; 00038 xavs_t *enc; 00039 xavs_picture_t pic; 00040 uint8_t *sei; 00041 int sei_size; 00042 AVFrame out_pic; 00043 int end_of_stream; 00044 } XavsContext; 00045 00046 static void XAVS_log(void *p, int level, const char *fmt, va_list args) 00047 { 00048 static const int level_map[] = { 00049 [XAVS_LOG_ERROR] = AV_LOG_ERROR, 00050 [XAVS_LOG_WARNING] = AV_LOG_WARNING, 00051 [XAVS_LOG_INFO] = AV_LOG_INFO, 00052 [XAVS_LOG_DEBUG] = AV_LOG_DEBUG 00053 }; 00054 00055 if (level < 0 || level > XAVS_LOG_DEBUG) 00056 return; 00057 00058 av_vlog(p, level_map[level], fmt, args); 00059 } 00060 00061 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, 00062 int size, xavs_nal_t *nals, 00063 int nnal, int skip_sei) 00064 { 00065 XavsContext *x4 = ctx->priv_data; 00066 uint8_t *p = buf; 00067 int i, s; 00068 00069 /* Write the SEI as part of the first frame. */ 00070 if (x4->sei_size > 0 && nnal > 0) { 00071 memcpy(p, x4->sei, x4->sei_size); 00072 p += x4->sei_size; 00073 x4->sei_size = 0; 00074 } 00075 00076 for (i = 0; i < nnal; i++) { 00077 /* Don't put the SEI in extradata. */ 00078 if (skip_sei && nals[i].i_type == NAL_SEI) { 00079 x4->sei = av_malloc( 5 + nals[i].i_payload * 4 / 3 ); 00080 if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nals + i) < 0) 00081 return -1; 00082 00083 continue; 00084 } 00085 s = xavs_nal_encode(p, &size, 1, nals + i); 00086 if (s < 0) 00087 return -1; 00088 p += s; 00089 } 00090 00091 return p - buf; 00092 } 00093 00094 static int XAVS_frame(AVCodecContext *ctx, uint8_t *buf, 00095 int bufsize, void *data) 00096 { 00097 XavsContext *x4 = ctx->priv_data; 00098 AVFrame *frame = data; 00099 xavs_nal_t *nal; 00100 int nnal, i; 00101 xavs_picture_t pic_out; 00102 00103 x4->pic.img.i_csp = XAVS_CSP_I420; 00104 x4->pic.img.i_plane = 3; 00105 00106 if (frame) { 00107 for (i = 0; i < 3; i++) { 00108 x4->pic.img.plane[i] = frame->data[i]; 00109 x4->pic.img.i_stride[i] = frame->linesize[i]; 00110 } 00111 00112 x4->pic.i_pts = frame->pts; 00113 x4->pic.i_type = XAVS_TYPE_AUTO; 00114 } 00115 00116 if (xavs_encoder_encode(x4->enc, &nal, &nnal, 00117 frame? &x4->pic: NULL, &pic_out) < 0) 00118 return -1; 00119 00120 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0); 00121 00122 if (bufsize < 0) 00123 return -1; 00124 00125 if (!bufsize && !frame && !(x4->end_of_stream)){ 00126 buf[bufsize] = 0x0; 00127 buf[bufsize+1] = 0x0; 00128 buf[bufsize+2] = 0x01; 00129 buf[bufsize+3] = 0xb1; 00130 bufsize += 4; 00131 x4->end_of_stream = END_OF_STREAM; 00132 return bufsize; 00133 } 00134 /* FIXME: libxavs now provides DTS */ 00135 /* but AVFrame doesn't have a field for it. */ 00136 x4->out_pic.pts = pic_out.i_pts; 00137 00138 switch (pic_out.i_type) { 00139 case XAVS_TYPE_IDR: 00140 case XAVS_TYPE_I: 00141 x4->out_pic.pict_type = AV_PICTURE_TYPE_I; 00142 break; 00143 case XAVS_TYPE_P: 00144 x4->out_pic.pict_type = AV_PICTURE_TYPE_P; 00145 break; 00146 case XAVS_TYPE_B: 00147 case XAVS_TYPE_BREF: 00148 x4->out_pic.pict_type = AV_PICTURE_TYPE_B; 00149 break; 00150 } 00151 00152 /* There is no IDR frame in AVS JiZhun */ 00153 /* Sequence header is used as a flag */ 00154 x4->out_pic.key_frame = pic_out.i_type == XAVS_TYPE_I; 00155 00156 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; 00157 00158 return bufsize; 00159 } 00160 00161 static av_cold int XAVS_close(AVCodecContext *avctx) 00162 { 00163 XavsContext *x4 = avctx->priv_data; 00164 00165 av_freep(&avctx->extradata); 00166 av_free(x4->sei); 00167 00168 if (x4->enc) 00169 xavs_encoder_close(x4->enc); 00170 00171 return 0; 00172 } 00173 00174 static av_cold int XAVS_init(AVCodecContext *avctx) 00175 { 00176 XavsContext *x4 = avctx->priv_data; 00177 00178 x4->sei_size = 0; 00179 xavs_param_default(&x4->params); 00180 00181 x4->params.pf_log = XAVS_log; 00182 x4->params.p_log_private = avctx; 00183 x4->params.i_keyint_max = avctx->gop_size; 00184 x4->params.rc.i_bitrate = avctx->bit_rate / 1000; 00185 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; 00186 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; 00187 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1; 00188 if (avctx->flags & CODEC_FLAG_PASS2) { 00189 x4->params.rc.b_stat_read = 1; 00190 } else { 00191 if (avctx->crf) { 00192 x4->params.rc.i_rc_method = XAVS_RC_CRF; 00193 x4->params.rc.f_rf_constant = avctx->crf; 00194 } else if (avctx->cqp > -1) { 00195 x4->params.rc.i_rc_method = XAVS_RC_CQP; 00196 x4->params.rc.i_qp_constant = avctx->cqp; 00197 } 00198 } 00199 00200 /* if neither crf nor cqp modes are selected we have to enable the RC */ 00201 /* we do it this way because we cannot check if the bitrate has been set */ 00202 if (!(avctx->crf || (avctx->cqp > -1))) 00203 x4->params.rc.i_rc_method = XAVS_RC_ABR; 00204 00205 x4->params.i_bframe = avctx->max_b_frames; 00206 /* cabac is not included in AVS JiZhun Profile */ 00207 x4->params.b_cabac = 0; 00208 00209 x4->params.i_bframe_adaptive = avctx->b_frame_strategy; 00210 x4->params.i_bframe_bias = avctx->bframebias; 00211 00212 avctx->has_b_frames = !!avctx->max_b_frames; 00213 00214 /* AVS doesn't allow B picture as reference */ 00215 /* The max allowed reference frame number of B is 2 */ 00216 x4->params.i_keyint_min = avctx->keyint_min; 00217 if (x4->params.i_keyint_min > x4->params.i_keyint_max) 00218 x4->params.i_keyint_min = x4->params.i_keyint_max; 00219 00220 x4->params.i_scenecut_threshold = avctx->scenechange_threshold; 00221 00222 // x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER; 00223 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha; 00224 x4->params.i_deblocking_filter_beta = avctx->deblockbeta; 00225 00226 x4->params.rc.i_qp_min = avctx->qmin; 00227 x4->params.rc.i_qp_max = avctx->qmax; 00228 x4->params.rc.i_qp_step = avctx->max_qdiff; 00229 00230 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ 00231 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ 00232 x4->params.rc.f_complexity_blur = avctx->complexityblur; 00233 00234 x4->params.i_frame_reference = avctx->refs; 00235 00236 x4->params.i_width = avctx->width; 00237 x4->params.i_height = avctx->height; 00238 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; 00239 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; 00240 /* This is only used for counting the fps */ 00241 x4->params.i_fps_num = avctx->time_base.den; 00242 x4->params.i_fps_den = avctx->time_base.num; 00243 x4->params.analyse.inter = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16; 00244 if (avctx->partitions) { 00245 if (avctx->partitions & XAVS_PART_I8X8) 00246 x4->params.analyse.inter |= XAVS_ANALYSE_I8x8; 00247 00248 if (avctx->partitions & XAVS_PART_P8X8) 00249 x4->params.analyse.inter |= XAVS_ANALYSE_PSUB16x16; 00250 00251 if (avctx->partitions & XAVS_PART_B8X8) 00252 x4->params.analyse.inter |= XAVS_ANALYSE_BSUB16x16; 00253 } 00254 00255 x4->params.analyse.i_direct_mv_pred = avctx->directpred; 00256 00257 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED; 00258 00259 switch (avctx->me_method) { 00260 case ME_EPZS: 00261 x4->params.analyse.i_me_method = XAVS_ME_DIA; 00262 break; 00263 case ME_HEX: 00264 x4->params.analyse.i_me_method = XAVS_ME_HEX; 00265 break; 00266 case ME_UMH: 00267 x4->params.analyse.i_me_method = XAVS_ME_UMH; 00268 break; 00269 case ME_FULL: 00270 x4->params.analyse.i_me_method = XAVS_ME_ESA; 00271 break; 00272 case ME_TESA: 00273 x4->params.analyse.i_me_method = XAVS_ME_TESA; 00274 break; 00275 default: 00276 x4->params.analyse.i_me_method = XAVS_ME_HEX; 00277 } 00278 00279 x4->params.analyse.i_me_range = avctx->me_range; 00280 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; 00281 00282 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS; 00283 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA; 00284 /* AVS P2 only enables 8x8 transform */ 00285 x4->params.analyse.b_transform_8x8 = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT; 00286 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP; 00287 00288 x4->params.analyse.i_trellis = avctx->trellis; 00289 x4->params.analyse.i_noise_reduction = avctx->noise_reduction; 00290 00291 if (avctx->level > 0) 00292 x4->params.i_level_idc = avctx->level; 00293 00294 x4->params.rc.f_rate_tolerance = 00295 (float)avctx->bit_rate_tolerance/avctx->bit_rate; 00296 00297 if ((avctx->rc_buffer_size) && 00298 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) { 00299 x4->params.rc.f_vbv_buffer_init = 00300 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size; 00301 } else 00302 x4->params.rc.f_vbv_buffer_init = 0.9; 00303 00304 /* TAG:do we have MB tree RC method */ 00305 /* what is the RC method we are now using? Default NO */ 00306 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE); 00307 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor); 00308 x4->params.rc.f_pb_factor = avctx->b_quant_factor; 00309 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; 00310 00311 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR; 00312 x4->params.i_log_level = XAVS_LOG_DEBUG; 00313 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD; 00314 x4->params.i_threads = avctx->thread_count; 00315 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT; 00316 00317 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) 00318 x4->params.b_repeat_headers = 0; 00319 00320 x4->enc = xavs_encoder_open(&x4->params); 00321 if (!x4->enc) 00322 return -1; 00323 00324 avctx->coded_frame = &x4->out_pic; 00325 /* TAG: Do we have GLOBAL HEADER in AVS */ 00326 /* We Have PPS and SPS in AVS */ 00327 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { 00328 xavs_nal_t *nal; 00329 int nnal, s; 00330 00331 s = xavs_encoder_headers(x4->enc, &nal, &nnal); 00332 00333 avctx->extradata = av_malloc(s); 00334 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1); 00335 } 00336 return 0; 00337 } 00338 00339 AVCodec ff_libxavs_encoder = { 00340 .name = "libxavs", 00341 .type = AVMEDIA_TYPE_VIDEO, 00342 .id = CODEC_ID_CAVS, 00343 .priv_data_size = sizeof(XavsContext), 00344 .init = XAVS_init, 00345 .encode = XAVS_frame, 00346 .close = XAVS_close, 00347 .capabilities = CODEC_CAP_DELAY, 00348 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE }, 00349 .long_name = NULL_IF_CONFIG_SMALL("libxavs - the Chinese Audio Video Standard Encoder"), 00350 }; 00351