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  1. /*
  2.  * Xvid rate control wrapper for lavc video encoders
  3.  *
  4.  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "config.h"
  24.  
  25. #if HAVE_IO_H
  26. #include <io.h>
  27. #endif
  28.  
  29. #if HAVE_UNISTD_H
  30. #include <unistd.h>
  31. #endif
  32.  
  33. #include <xvid.h>
  34.  
  35. #include "libavutil/attributes.h"
  36. #include "libavutil/file.h"
  37.  
  38. #include "avcodec.h"
  39. #include "libxvid.h"
  40. #include "mpegvideo.h"
  41.  
  42. av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
  43. {
  44.     char *tmp_name;
  45.     int fd, i;
  46.     xvid_plg_create_t xvid_plg_create = { 0 };
  47.     xvid_plugin_2pass2_t xvid_2pass2  = { 0 };
  48.  
  49.     fd = av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
  50.     if (fd < 0) {
  51.         av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
  52.         return fd;
  53.     }
  54.  
  55.     for (i = 0; i < s->rc_context.num_entries; i++) {
  56.         static const char frame_types[] = " ipbs";
  57.         char tmp[256];
  58.         RateControlEntry *rce;
  59.  
  60.         rce = &s->rc_context.entry[i];
  61.  
  62.         snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
  63.                  frame_types[rce->pict_type],
  64.                  (int) lrintf(rce->qscale / FF_QP2LAMBDA),
  65.                  rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
  66.                  rce->skip_count,
  67.                  (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits + 7) / 8,
  68.                  (rce->header_bits + rce->mv_bits + 7) / 8);
  69.  
  70.         if (write(fd, tmp, strlen(tmp)) < 0) {
  71.             int ret = AVERROR(errno);
  72.             av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", av_err2str(ret));
  73.             av_free(tmp_name);
  74.             close(fd);
  75.             return ret;
  76.         }
  77.     }
  78.  
  79.     close(fd);
  80.  
  81.     xvid_2pass2.version     = XVID_MAKE_VERSION(1, 1, 0);
  82.     xvid_2pass2.filename    = tmp_name;
  83.     xvid_2pass2.bitrate     = s->avctx->bit_rate;
  84.     xvid_2pass2.vbv_size    = s->avctx->rc_buffer_size;
  85.     xvid_2pass2.vbv_maxrate = s->avctx->rc_max_rate;
  86.     xvid_2pass2.vbv_initial = s->avctx->rc_initial_buffer_occupancy;
  87.  
  88.     xvid_plg_create.version = XVID_MAKE_VERSION(1, 1, 0);
  89.     xvid_plg_create.fbase   = s->avctx->time_base.den;
  90.     xvid_plg_create.fincr   = s->avctx->time_base.num;
  91.     xvid_plg_create.param   = &xvid_2pass2;
  92.  
  93.     if (xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create,
  94.                            &s->rc_context.non_lavc_opaque) < 0) {
  95.         av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
  96.         return -1;
  97.     }
  98.     return 0;
  99. }
  100.  
  101. float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run)
  102. {
  103.     xvid_plg_data_t xvid_plg_data = { 0 };
  104.  
  105.     xvid_plg_data.version       = XVID_MAKE_VERSION(1, 1, 0);
  106.     xvid_plg_data.width         = s->width;
  107.     xvid_plg_data.height        = s->height;
  108.     xvid_plg_data.mb_width      = s->mb_width;
  109.     xvid_plg_data.mb_height     = s->mb_height;
  110.     xvid_plg_data.fbase         = s->avctx->time_base.den;
  111.     xvid_plg_data.fincr         = s->avctx->time_base.num;
  112.     xvid_plg_data.min_quant[0]  = s->avctx->qmin;
  113.     xvid_plg_data.min_quant[1]  = s->avctx->qmin;
  114.     xvid_plg_data.min_quant[2]  = s->avctx->qmin;   // FIXME i/b factor & offset
  115.     xvid_plg_data.max_quant[0]  = s->avctx->qmax;
  116.     xvid_plg_data.max_quant[1]  = s->avctx->qmax;
  117.     xvid_plg_data.max_quant[2]  = s->avctx->qmax;   // FIXME i/b factor & offset
  118.     xvid_plg_data.bquant_offset = 0;      //  100 * s->avctx->b_quant_offset;
  119.     xvid_plg_data.bquant_ratio  = 100;    //      * s->avctx->b_quant_factor;
  120.  
  121.     if (!s->rc_context.dry_run_qscale) {
  122.         if (s->picture_number) {
  123.             xvid_plg_data.length        =
  124.             xvid_plg_data.stats.length  = (s->frame_bits + 7) / 8;
  125.             xvid_plg_data.frame_num     = s->rc_context.last_picture_number;
  126.             xvid_plg_data.quant         = s->qscale;
  127.             xvid_plg_data.type          = s->last_pict_type;
  128.             if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
  129.                                    XVID_PLG_AFTER, &xvid_plg_data, NULL)) {
  130.                 av_log(s->avctx, AV_LOG_ERROR,
  131.                        "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
  132.                 return -1;
  133.             }
  134.         }
  135.         s->rc_context.last_picture_number =
  136.         xvid_plg_data.frame_num           = s->picture_number;
  137.         xvid_plg_data.quant               = 0;
  138.         if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
  139.                                XVID_PLG_BEFORE, &xvid_plg_data, NULL)) {
  140.             av_log(s->avctx, AV_LOG_ERROR,
  141.                    "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
  142.             return -1;
  143.         }
  144.         s->rc_context.dry_run_qscale = xvid_plg_data.quant;
  145.     }
  146.     xvid_plg_data.quant = s->rc_context.dry_run_qscale;
  147.     if (!dry_run)
  148.         s->rc_context.dry_run_qscale = 0;
  149.  
  150.     // FIXME this is not exactly identical to Xvid
  151.     if (s->pict_type == AV_PICTURE_TYPE_B)
  152.         return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor +
  153.             s->avctx->b_quant_offset;
  154.     else
  155.         return xvid_plg_data.quant * FF_QP2LAMBDA;
  156. }
  157.  
  158. av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
  159. {
  160.     xvid_plg_destroy_t xvid_plg_destroy;
  161.  
  162.     xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY,
  163.                        &xvid_plg_destroy, NULL);
  164. }
  165.