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  1. /*
  2.  * AVS encoding using the xavs library
  3.  * Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com>
  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.  */
  21.  
  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"
  34.  
  35. #define END_OF_STREAM 0x001
  36.  
  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*/
  40.  
  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 motion_est;
  57.     int mbtree;
  58.     int mixed_refs;
  59.  
  60.     int64_t *pts_buffer;
  61.     int out_frame_count;
  62. } XavsContext;
  63.  
  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.     };
  72.  
  73.     if (level < 0 || level > XAVS_LOG_DEBUG)
  74.         return;
  75.  
  76.     av_vlog(p, level_map[level], fmt, args);
  77. }
  78.  
  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 + AV_INPUT_BUFFER_MIN_SIZE;
  85.  
  86.     if (!nnal)
  87.         return 0;
  88.  
  89.     for (i = 0; i < nnal; i++)
  90.         size += nals[i].i_payload;
  91.  
  92.     if ((ret = ff_alloc_packet2(ctx, pkt, size, 0)) < 0)
  93.         return ret;
  94.     p = pkt->data;
  95.  
  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 *avctx, AVPacket *pkt,
  115.                       const AVFrame *frame, int *got_packet)
  116. {
  117.     XavsContext *x4 = avctx->priv_data;
  118.     xavs_nal_t *nal;
  119.     int nnal, i, ret;
  120.     xavs_picture_t pic_out;
  121.     int pict_type;
  122.  
  123.     x4->pic.img.i_csp   = XAVS_CSP_I420;
  124.     x4->pic.img.i_plane = 3;
  125.  
  126.     if (frame) {
  127.        for (i = 0; i < 3; i++) {
  128.             x4->pic.img.plane[i] = frame->data[i];
  129.             x4->pic.img.i_stride[i] = frame->linesize[i];
  130.        }
  131.  
  132.         x4->pic.i_pts  = frame->pts;
  133.         x4->pic.i_type = XAVS_TYPE_AUTO;
  134.         x4->pts_buffer[avctx->frame_number % (avctx->max_b_frames+1)] = frame->pts;
  135.     }
  136.  
  137.     if (xavs_encoder_encode(x4->enc, &nal, &nnal,
  138.                             frame? &x4->pic: NULL, &pic_out) < 0)
  139.     return -1;
  140.  
  141.     ret = encode_nals(avctx, pkt, nal, nnal);
  142.  
  143.     if (ret < 0)
  144.         return -1;
  145.  
  146.     if (!ret) {
  147.         if (!frame && !(x4->end_of_stream)) {
  148.             if ((ret = ff_alloc_packet2(avctx, pkt, 4, 0)) < 0)
  149.                 return ret;
  150.  
  151.             pkt->data[0] = 0x0;
  152.             pkt->data[1] = 0x0;
  153.             pkt->data[2] = 0x01;
  154.             pkt->data[3] = 0xb1;
  155.             pkt->dts = 2*x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)] -
  156.                          x4->pts_buffer[(x4->out_frame_count-2)%(avctx->max_b_frames+1)];
  157.             x4->end_of_stream = END_OF_STREAM;
  158.             *got_packet = 1;
  159.         }
  160.         return 0;
  161.     }
  162.  
  163. #if FF_API_CODED_FRAME
  164. FF_DISABLE_DEPRECATION_WARNINGS
  165.     avctx->coded_frame->pts = pic_out.i_pts;
  166. FF_ENABLE_DEPRECATION_WARNINGS
  167. #endif
  168.     pkt->pts = pic_out.i_pts;
  169.     if (avctx->has_b_frames) {
  170.         if (!x4->out_frame_count)
  171.             pkt->dts = pkt->pts - (x4->pts_buffer[1] - x4->pts_buffer[0]);
  172.         else
  173.             pkt->dts = x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)];
  174.     } else
  175.         pkt->dts = pkt->pts;
  176.  
  177.     switch (pic_out.i_type) {
  178.     case XAVS_TYPE_IDR:
  179.     case XAVS_TYPE_I:
  180.         pict_type = AV_PICTURE_TYPE_I;
  181.         break;
  182.     case XAVS_TYPE_P:
  183.         pict_type = AV_PICTURE_TYPE_P;
  184.         break;
  185.     case XAVS_TYPE_B:
  186.     case XAVS_TYPE_BREF:
  187.         pict_type = AV_PICTURE_TYPE_B;
  188.         break;
  189.     default:
  190.         pict_type = AV_PICTURE_TYPE_NONE;
  191.     }
  192. #if FF_API_CODED_FRAME
  193. FF_DISABLE_DEPRECATION_WARNINGS
  194.     avctx->coded_frame->pict_type = pict_type;
  195. FF_ENABLE_DEPRECATION_WARNINGS
  196. #endif
  197.  
  198.     /* There is no IDR frame in AVS JiZhun */
  199.     /* Sequence header is used as a flag */
  200.     if (pic_out.i_type == XAVS_TYPE_I) {
  201. #if FF_API_CODED_FRAME
  202. FF_DISABLE_DEPRECATION_WARNINGS
  203.         avctx->coded_frame->key_frame = 1;
  204. FF_ENABLE_DEPRECATION_WARNINGS
  205. #endif
  206.         pkt->flags |= AV_PKT_FLAG_KEY;
  207.     }
  208.  
  209. #if FF_API_CODED_FRAME
  210. FF_DISABLE_DEPRECATION_WARNINGS
  211.     avctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
  212. FF_ENABLE_DEPRECATION_WARNINGS
  213. #endif
  214.  
  215.     ff_side_data_set_encoder_stats(pkt, (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA, NULL, 0, pict_type);
  216.  
  217.     x4->out_frame_count++;
  218.     *got_packet = ret;
  219.     return 0;
  220. }
  221.  
  222. static av_cold int XAVS_close(AVCodecContext *avctx)
  223. {
  224.     XavsContext *x4 = avctx->priv_data;
  225.  
  226.     av_freep(&avctx->extradata);
  227.     av_freep(&x4->sei);
  228.     av_freep(&x4->pts_buffer);
  229.  
  230.     if (x4->enc)
  231.         xavs_encoder_close(x4->enc);
  232.  
  233.     return 0;
  234. }
  235.  
  236. static av_cold int XAVS_init(AVCodecContext *avctx)
  237. {
  238.     XavsContext *x4 = avctx->priv_data;
  239.  
  240.     x4->sei_size = 0;
  241.     xavs_param_default(&x4->params);
  242.  
  243.     x4->params.pf_log               = XAVS_log;
  244.     x4->params.p_log_private        = avctx;
  245.     x4->params.i_keyint_max         = avctx->gop_size;
  246.     if (avctx->bit_rate) {
  247.         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
  248.         x4->params.rc.i_rc_method = XAVS_RC_ABR;
  249.     }
  250.     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
  251.     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
  252.     x4->params.rc.b_stat_write      = avctx->flags & AV_CODEC_FLAG_PASS1;
  253.     if (avctx->flags & AV_CODEC_FLAG_PASS2) {
  254.         x4->params.rc.b_stat_read = 1;
  255.     } else {
  256.         if (x4->crf >= 0) {
  257.             x4->params.rc.i_rc_method   = XAVS_RC_CRF;
  258.             x4->params.rc.f_rf_constant = x4->crf;
  259.         } else if (x4->cqp >= 0) {
  260.             x4->params.rc.i_rc_method   = XAVS_RC_CQP;
  261.             x4->params.rc.i_qp_constant = x4->cqp;
  262.         }
  263.     }
  264.  
  265.     if (x4->aud >= 0)
  266.         x4->params.b_aud                      = x4->aud;
  267.     if (x4->mbtree >= 0)
  268.         x4->params.rc.b_mb_tree               = x4->mbtree;
  269.     if (x4->direct_pred >= 0)
  270.         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
  271.     if (x4->fast_pskip >= 0)
  272.         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
  273.     if (x4->motion_est >= 0)
  274.         x4->params.analyse.i_me_method        = x4->motion_est;
  275.     if (x4->mixed_refs >= 0)
  276.         x4->params.analyse.b_mixed_references = x4->mixed_refs;
  277.     if (x4->b_bias != INT_MIN)
  278.         x4->params.i_bframe_bias              = x4->b_bias;
  279.     if (x4->cplxblur >= 0)
  280.         x4->params.rc.f_complexity_blur = x4->cplxblur;
  281.  
  282. #if FF_API_MOTION_EST
  283. FF_DISABLE_DEPRECATION_WARNINGS
  284.     if (x4->motion_est < 0) {
  285.         switch (avctx->me_method) {
  286.         case  ME_EPZS:
  287.             x4->params.analyse.i_me_method = XAVS_ME_DIA;
  288.             break;
  289.         case  ME_HEX:
  290.             x4->params.analyse.i_me_method = XAVS_ME_HEX;
  291.             break;
  292.         case  ME_UMH:
  293.             x4->params.analyse.i_me_method = XAVS_ME_UMH;
  294.             break;
  295.         case  ME_FULL:
  296.             x4->params.analyse.i_me_method = XAVS_ME_ESA;
  297.             break;
  298.         case  ME_TESA:
  299.             x4->params.analyse.i_me_method = XAVS_ME_TESA;
  300.             break;
  301.         default:
  302.             x4->params.analyse.i_me_method = XAVS_ME_HEX;
  303.         }
  304.     }
  305. FF_ENABLE_DEPRECATION_WARNINGS
  306. #endif
  307.  
  308.     x4->params.i_bframe          = avctx->max_b_frames;
  309.     /* cabac is not included in AVS JiZhun Profile */
  310.     x4->params.b_cabac           = 0;
  311.  
  312.     x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
  313.  
  314.     avctx->has_b_frames          = !!avctx->max_b_frames;
  315.  
  316.     /* AVS doesn't allow B picture as reference */
  317.     /* The max allowed reference frame number of B is 2 */
  318.     x4->params.i_keyint_min      = avctx->keyint_min;
  319.     if (x4->params.i_keyint_min > x4->params.i_keyint_max)
  320.         x4->params.i_keyint_min = x4->params.i_keyint_max;
  321.  
  322.     x4->params.i_scenecut_threshold        = avctx->scenechange_threshold;
  323.  
  324.    // x4->params.b_deblocking_filter       = avctx->flags & AV_CODEC_FLAG_LOOP_FILTER;
  325.  
  326.     x4->params.rc.i_qp_min                 = avctx->qmin;
  327.     x4->params.rc.i_qp_max                 = avctx->qmax;
  328.     x4->params.rc.i_qp_step                = avctx->max_qdiff;
  329.  
  330.     x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
  331.     x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
  332.  
  333.     x4->params.i_frame_reference    = avctx->refs;
  334.  
  335.     x4->params.i_width              = avctx->width;
  336.     x4->params.i_height             = avctx->height;
  337.     x4->params.vui.i_sar_width      = avctx->sample_aspect_ratio.num;
  338.     x4->params.vui.i_sar_height     = avctx->sample_aspect_ratio.den;
  339.     /* This is only used for counting the fps */
  340.     x4->params.i_fps_num            = avctx->time_base.den;
  341.     x4->params.i_fps_den            = avctx->time_base.num;
  342.     x4->params.analyse.inter        = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16;
  343.  
  344.     x4->params.analyse.i_me_range = avctx->me_range;
  345.     x4->params.analyse.i_subpel_refine    = avctx->me_subpel_quality;
  346.  
  347.     x4->params.analyse.b_chroma_me        = avctx->me_cmp & FF_CMP_CHROMA;
  348.     /* AVS P2 only enables 8x8 transform */
  349.     x4->params.analyse.b_transform_8x8    = 1; //avctx->flags2 & AV_CODEC_FLAG2_8X8DCT;
  350.  
  351.     x4->params.analyse.i_trellis          = avctx->trellis;
  352.     x4->params.analyse.i_noise_reduction  = avctx->noise_reduction;
  353.  
  354.     if (avctx->level > 0)
  355.         x4->params.i_level_idc = avctx->level;
  356.  
  357.     if (avctx->bit_rate > 0)
  358.         x4->params.rc.f_rate_tolerance =
  359.             (float)avctx->bit_rate_tolerance / avctx->bit_rate;
  360.  
  361.     if ((avctx->rc_buffer_size) &&
  362.         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
  363.         x4->params.rc.f_vbv_buffer_init =
  364.             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
  365.     } else
  366.         x4->params.rc.f_vbv_buffer_init = 0.9;
  367.  
  368.     /* TAG:do we have MB tree RC method */
  369.     /* what is the RC method we are now using? Default NO */
  370.     x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
  371.     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
  372.     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
  373.  
  374.     x4->params.analyse.b_psnr = avctx->flags & AV_CODEC_FLAG_PSNR;
  375.     x4->params.i_log_level    = XAVS_LOG_DEBUG;
  376.     x4->params.i_threads      = avctx->thread_count;
  377.     x4->params.b_interlaced   = avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT;
  378.  
  379.     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
  380.         x4->params.b_repeat_headers = 0;
  381.  
  382.     x4->enc = xavs_encoder_open(&x4->params);
  383.     if (!x4->enc)
  384.         return -1;
  385.  
  386.     if (!(x4->pts_buffer = av_mallocz_array((avctx->max_b_frames+1), sizeof(*x4->pts_buffer))))
  387.         return AVERROR(ENOMEM);
  388.  
  389.     /* TAG: Do we have GLOBAL HEADER in AVS */
  390.     /* We Have PPS and SPS in AVS */
  391.     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER && 0) {
  392.         xavs_nal_t *nal;
  393.         int nnal, s, i, size;
  394.         uint8_t *p;
  395.  
  396.         s = xavs_encoder_headers(x4->enc, &nal, &nnal);
  397.  
  398.         avctx->extradata = p = av_malloc(s);
  399.         for (i = 0; i < nnal; i++) {
  400.             /* Don't put the SEI in extradata. */
  401.             if (nal[i].i_type == NAL_SEI) {
  402.                 x4->sei = av_malloc( 5 + nal[i].i_payload * 4 / 3 );
  403.                 if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nal + i) < 0)
  404.                     return -1;
  405.  
  406.                 continue;
  407.             }
  408.             size = xavs_nal_encode(p, &s, 1, nal + i);
  409.             if (size < 0)
  410.                 return -1;
  411.             p += size;
  412.         }
  413.         avctx->extradata_size = p - avctx->extradata;
  414.     }
  415.     return 0;
  416. }
  417.  
  418. #define OFFSET(x) offsetof(XavsContext, x)
  419. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
  420. static const AVOption options[] = {
  421.     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE },
  422.     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, INT_MAX, VE },
  423.     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    {.i64 = INT_MIN}, INT_MIN, INT_MAX, VE },
  424.     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE},
  425.     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },
  426.     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
  427.     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
  428.     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
  429.     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
  430.     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
  431.     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
  432.     { "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 },
  433.     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
  434.     { "motion-est",   "Set motion estimation method",                     OFFSET(motion_est),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, XAVS_ME_TESA, VE, "motion-est"},
  435.     { "dia",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_DIA },               INT_MIN, INT_MAX, VE, "motion-est" },
  436.     { "hex",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_HEX },               INT_MIN, INT_MAX, VE, "motion-est" },
  437.     { "umh",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_UMH },               INT_MIN, INT_MAX, VE, "motion-est" },
  438.     { "esa",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_ESA },               INT_MIN, INT_MAX, VE, "motion-est" },
  439.     { "tesa",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_TESA },              INT_MIN, INT_MAX, VE, "motion-est" },
  440.  
  441.     { NULL },
  442. };
  443.  
  444. static const AVClass xavs_class = {
  445.     .class_name = "libxavs",
  446.     .item_name  = av_default_item_name,
  447.     .option     = options,
  448.     .version    = LIBAVUTIL_VERSION_INT,
  449. };
  450.  
  451. static const AVCodecDefault xavs_defaults[] = {
  452.     { "b",                "0" },
  453.     { NULL },
  454. };
  455.  
  456. AVCodec ff_libxavs_encoder = {
  457.     .name           = "libxavs",
  458.     .long_name      = NULL_IF_CONFIG_SMALL("libxavs Chinese AVS (Audio Video Standard)"),
  459.     .type           = AVMEDIA_TYPE_VIDEO,
  460.     .id             = AV_CODEC_ID_CAVS,
  461.     .priv_data_size = sizeof(XavsContext),
  462.     .init           = XAVS_init,
  463.     .encode2        = XAVS_frame,
  464.     .close          = XAVS_close,
  465.     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
  466.     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
  467.     .priv_class     = &xavs_class,
  468.     .defaults       = xavs_defaults,
  469. };
  470.