git.sesse.net Git - ffmpeg/blob - fftools/ffmpeg_filter.c

   1 /*
   2  * ffmpeg filter configuration
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <stdint.h>
  22
  23 #include "ffmpeg.h"
  24
  25 #include "libavfilter/avfilter.h"
  26 #include "libavfilter/buffersink.h"
  27 #include "libavfilter/buffersrc.h"
  28
  29 #include "libavresample/avresample.h"
  30
  31 #include "libavutil/avassert.h"
  32 #include "libavutil/avstring.h"
  33 #include "libavutil/bprint.h"
  34 #include "libavutil/channel_layout.h"
  35 #include "libavutil/display.h"
  36 #include "libavutil/opt.h"
  37 #include "libavutil/pixdesc.h"
  38 #include "libavutil/pixfmt.h"
  39 #include "libavutil/imgutils.h"
  40 #include "libavutil/samplefmt.h"
  41
  42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
  43 {
  44     static const enum AVPixelFormat mjpeg_formats[] =
  45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
  46           AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
  47           AV_PIX_FMT_NONE };
  48     static const enum AVPixelFormat ljpeg_formats[] =
  49         { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
  50           AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
  51           AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
  52           AV_PIX_FMT_NONE};
  53
  54     if (codec_id == AV_CODEC_ID_MJPEG) {
  55         return mjpeg_formats;
  56     } else if (codec_id == AV_CODEC_ID_LJPEG) {
  57         return ljpeg_formats;
  58     } else {
  59         return default_formats;
  60     }
  61 }
  62
  63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
  64 {
  65     if (codec && codec->pix_fmts) {
  66         const enum AVPixelFormat *p = codec->pix_fmts;
  67         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
  68         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
  69         enum AVPixelFormat best= AV_PIX_FMT_NONE;
  70
  71         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
  72             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
  73         }
  74         for (; *p != AV_PIX_FMT_NONE; p++) {
  75             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
  76             if (*p == target)
  77                 break;
  78         }
  79         if (*p == AV_PIX_FMT_NONE) {
  80             if (target != AV_PIX_FMT_NONE)
  81                 av_log(NULL, AV_LOG_WARNING,
  82                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
  83                        av_get_pix_fmt_name(target),
  84                        codec->name,
  85                        av_get_pix_fmt_name(best));
  86             return best;
  87         }
  88     }
  89     return target;
  90 }
  91
  92 void choose_sample_fmt(AVStream *st, AVCodec *codec)
  93 {
  94     if (codec && codec->sample_fmts) {
  95         const enum AVSampleFormat *p = codec->sample_fmts;
  96         for (; *p != -1; p++) {
  97             if (*p == st->codecpar->format)
  98                 break;
  99         }
 100         if (*p == -1) {
 101             if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
 102                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
 103             if(av_get_sample_fmt_name(st->codecpar->format))
 104             av_log(NULL, AV_LOG_WARNING,
 105                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
 106                    av_get_sample_fmt_name(st->codecpar->format),
 107                    codec->name,
 108                    av_get_sample_fmt_name(codec->sample_fmts[0]));
 109             st->codecpar->format = codec->sample_fmts[0];
 110         }
 111     }
 112 }
 113
 114 static char *choose_pix_fmts(OutputFilter *ofilter)
 115 {
 116     OutputStream *ost = ofilter->ost;
 117     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
 118     if (strict_dict)
 119         // used by choose_pixel_fmt() and below
 120         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
 121
 122      if (ost->keep_pix_fmt) {
 123         avfilter_graph_set_auto_convert(ofilter->graph->graph,
 124                                             AVFILTER_AUTO_CONVERT_NONE);
 125         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 126             return NULL;
 127         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 128     }
 129     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 130         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 131     } else if (ost->enc && ost->enc->pix_fmts) {
 132         const enum AVPixelFormat *p;
 133         AVIOContext *s = NULL;
 134         uint8_t *ret;
 135         int len;
 136
 137         if (avio_open_dyn_buf(&s) < 0)
 138             exit_program(1);
 139
 140         p = ost->enc->pix_fmts;
 141         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
 142             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
 143         }
 144
 145         for (; *p != AV_PIX_FMT_NONE; p++) {
 146             const char *name = av_get_pix_fmt_name(*p);
 147             avio_printf(s, "%s|", name);
 148         }
 149         len = avio_close_dyn_buf(s, &ret);
 150         ret[len - 1] = 0;
 151         return ret;
 152     } else
 153         return NULL;
 154 }
 155
 156 /* Define a function for building a string containing a list of
 157  * allowed formats. */
 158 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 159 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 160 {                                                                              \
 161     if (ofilter->var != none) {                                                \
 162         get_name(ofilter->var);                                                \
 163         return av_strdup(name);                                                \
 164     } else if (ofilter->supported_list) {                                      \
 165         const type *p;                                                         \
 166         AVIOContext *s = NULL;                                                 \
 167         uint8_t *ret;                                                          \
 168         int len;                                                               \
 169                                                                                \
 170         if (avio_open_dyn_buf(&s) < 0)                                         \
 171             exit_program(1);                                                           \
 172                                                                                \
 173         for (p = ofilter->supported_list; *p != none; p++) {                   \
 174             get_name(*p);                                                      \
 175             avio_printf(s, "%s|", name);                                       \
 176         }                                                                      \
 177         len = avio_close_dyn_buf(s, &ret);                                     \
 178         ret[len - 1] = 0;                                                      \
 179         return ret;                                                            \
 180     } else                                                                     \
 181         return NULL;                                                           \
 182 }
 183
 184 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 185 //                  GET_PIX_FMT_NAME)
 186
 187 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 188                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 189
 190 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 191                   GET_SAMPLE_RATE_NAME)
 192
 193 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 194                   GET_CH_LAYOUT_NAME)
 195
 196 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 197 {
 198     FilterGraph *fg = av_mallocz(sizeof(*fg));
 199
 200     if (!fg)
 201         exit_program(1);
 202     fg->index = nb_filtergraphs;
 203
 204     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 205     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 206         exit_program(1);
 207     fg->outputs[0]->ost   = ost;
 208     fg->outputs[0]->graph = fg;
 209     fg->outputs[0]->format = -1;
 210
 211     ost->filter = fg->outputs[0];
 212
 213     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 214     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 215         exit_program(1);
 216     fg->inputs[0]->ist   = ist;
 217     fg->inputs[0]->graph = fg;
 218     fg->inputs[0]->format = -1;
 219
 220     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 221     if (!fg->inputs[0]->frame_queue)
 222         exit_program(1);
 223
 224     GROW_ARRAY(ist->filters, ist->nb_filters);
 225     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 226
 227     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 228     filtergraphs[nb_filtergraphs - 1] = fg;
 229
 230     return 0;
 231 }
 232
 233 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 234 {
 235     AVFilterContext *ctx = inout->filter_ctx;
 236     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 237     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 238     AVIOContext *pb;
 239     uint8_t *res = NULL;
 240
 241     if (avio_open_dyn_buf(&pb) < 0)
 242         exit_program(1);
 243
 244     avio_printf(pb, "%s", ctx->filter->name);
 245     if (nb_pads > 1)
 246         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 247     avio_w8(pb, 0);
 248     avio_close_dyn_buf(pb, &res);
 249     return res;
 250 }
 251
 252 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 253 {
 254     InputStream *ist = NULL;
 255     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 256     int i;
 257
 258     // TODO: support other filter types
 259     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 260         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 261                "currently.\n");
 262         exit_program(1);
 263     }
 264
 265     if (in->name) {
 266         AVFormatContext *s;
 267         AVStream       *st = NULL;
 268         char *p;
 269         int file_idx = strtol(in->name, &p, 0);
 270
 271         if (file_idx < 0 || file_idx >= nb_input_files) {
 272             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 273                    file_idx, fg->graph_desc);
 274             exit_program(1);
 275         }
 276         s = input_files[file_idx]->ctx;
 277
 278         for (i = 0; i < s->nb_streams; i++) {
 279             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 280             if (stream_type != type &&
 281                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 282                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 283                 continue;
 284             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 285                 st = s->streams[i];
 286                 break;
 287             }
 288         }
 289         if (!st) {
 290             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 291                    "matches no streams.\n", p, fg->graph_desc);
 292             exit_program(1);
 293         }
 294         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 295     } else {
 296         /* find the first unused stream of corresponding type */
 297         for (i = 0; i < nb_input_streams; i++) {
 298             ist = input_streams[i];
 299             if (ist->dec_ctx->codec_type == type && ist->discard)
 300                 break;
 301         }
 302         if (i == nb_input_streams) {
 303             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 304                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 305                    in->filter_ctx->name);
 306             exit_program(1);
 307         }
 308     }
 309     av_assert0(ist);
 310
 311     ist->discard         = 0;
 312     ist->decoding_needed |= DECODING_FOR_FILTER;
 313     ist->st->discard = AVDISCARD_NONE;
 314
 315     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 316     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 317         exit_program(1);
 318     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 319     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 320     fg->inputs[fg->nb_inputs - 1]->format = -1;
 321     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 322     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 323
 324     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 325     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 326         exit_program(1);
 327
 328     GROW_ARRAY(ist->filters, ist->nb_filters);
 329     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 330 }
 331
 332 int init_complex_filtergraph(FilterGraph *fg)
 333 {
 334     AVFilterInOut *inputs, *outputs, *cur;
 335     AVFilterGraph *graph;
 336     int ret = 0;
 337
 338     /* this graph is only used for determining the kinds of inputs
 339      * and outputs we have, and is discarded on exit from this function */
 340     graph = avfilter_graph_alloc();
 341     if (!graph)
 342         return AVERROR(ENOMEM);
 343     graph->nb_threads = 1;
 344
 345     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 346     if (ret < 0)
 347         goto fail;
 348
 349     for (cur = inputs; cur; cur = cur->next)
 350         init_input_filter(fg, cur);
 351
 352     for (cur = outputs; cur;) {
 353         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 354         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 355         if (!fg->outputs[fg->nb_outputs - 1])
 356             exit_program(1);
 357
 358         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 359         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 360         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 361                                                                          cur->pad_idx);
 362         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 363         cur = cur->next;
 364         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 365     }
 366
 367 fail:
 368     avfilter_inout_free(&inputs);
 369     avfilter_graph_free(&graph);
 370     return ret;
 371 }
 372
 373 static int insert_trim(int64_t start_time, int64_t duration,
 374                        AVFilterContext **last_filter, int *pad_idx,
 375                        const char *filter_name)
 376 {
 377     AVFilterGraph *graph = (*last_filter)->graph;
 378     AVFilterContext *ctx;
 379     const AVFilter *trim;
 380     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 381     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 382     int ret = 0;
 383
 384     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 385         return 0;
 386
 387     trim = avfilter_get_by_name(name);
 388     if (!trim) {
 389         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 390                "recording time.\n", name);
 391         return AVERROR_FILTER_NOT_FOUND;
 392     }
 393
 394     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 395     if (!ctx)
 396         return AVERROR(ENOMEM);
 397
 398     if (duration != INT64_MAX) {
 399         ret = av_opt_set_int(ctx, "durationi", duration,
 400                                 AV_OPT_SEARCH_CHILDREN);
 401     }
 402     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 403         ret = av_opt_set_int(ctx, "starti", start_time,
 404                                 AV_OPT_SEARCH_CHILDREN);
 405     }
 406     if (ret < 0) {
 407         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 408         return ret;
 409     }
 410
 411     ret = avfilter_init_str(ctx, NULL);
 412     if (ret < 0)
 413         return ret;
 414
 415     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 416     if (ret < 0)
 417         return ret;
 418
 419     *last_filter = ctx;
 420     *pad_idx     = 0;
 421     return 0;
 422 }
 423
 424 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 425                          const char *filter_name, const char *args)
 426 {
 427     AVFilterGraph *graph = (*last_filter)->graph;
 428     AVFilterContext *ctx;
 429     int ret;
 430
 431     ret = avfilter_graph_create_filter(&ctx,
 432                                        avfilter_get_by_name(filter_name),
 433                                        filter_name, args, NULL, graph);
 434     if (ret < 0)
 435         return ret;
 436
 437     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 438     if (ret < 0)
 439         return ret;
 440
 441     *last_filter = ctx;
 442     *pad_idx     = 0;
 443     return 0;
 444 }
 445
 446 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 447 {
 448     char *pix_fmts;
 449     OutputStream *ost = ofilter->ost;
 450     OutputFile    *of = output_files[ost->file_index];
 451     AVFilterContext *last_filter = out->filter_ctx;
 452     int pad_idx = out->pad_idx;
 453     int ret;
 454     char name[255];
 455
 456     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 457     ret = avfilter_graph_create_filter(&ofilter->filter,
 458                                        avfilter_get_by_name("buffersink"),
 459                                        name, NULL, NULL, fg->graph);
 460
 461     if (ret < 0)
 462         return ret;
 463
 464     if (ofilter->width || ofilter->height) {
 465         char args[255];
 466         AVFilterContext *filter;
 467         AVDictionaryEntry *e = NULL;
 468
 469         snprintf(args, sizeof(args), "%d:%d",
 470                  ofilter->width, ofilter->height);
 471
 472         while ((e = av_dict_get(ost->sws_dict, "", e,
 473                                 AV_DICT_IGNORE_SUFFIX))) {
 474             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 475         }
 476
 477         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 478                  ost->file_index, ost->index);
 479         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 480                                                 name, args, NULL, fg->graph)) < 0)
 481             return ret;
 482         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 483             return ret;
 484
 485         last_filter = filter;
 486         pad_idx = 0;
 487     }
 488
 489     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 490         AVFilterContext *filter;
 491         snprintf(name, sizeof(name), "format_out_%d_%d",
 492                  ost->file_index, ost->index);
 493         ret = avfilter_graph_create_filter(&filter,
 494                                            avfilter_get_by_name("format"),
 495                                            "format", pix_fmts, NULL, fg->graph);
 496         av_freep(&pix_fmts);
 497         if (ret < 0)
 498             return ret;
 499         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 500             return ret;
 501
 502         last_filter = filter;
 503         pad_idx     = 0;
 504     }
 505
 506     if (ost->frame_rate.num && 0) {
 507         AVFilterContext *fps;
 508         char args[255];
 509
 510         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 511                  ost->frame_rate.den);
 512         snprintf(name, sizeof(name), "fps_out_%d_%d",
 513                  ost->file_index, ost->index);
 514         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 515                                            name, args, NULL, fg->graph);
 516         if (ret < 0)
 517             return ret;
 518
 519         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 520         if (ret < 0)
 521             return ret;
 522         last_filter = fps;
 523         pad_idx = 0;
 524     }
 525
 526     snprintf(name, sizeof(name), "trim_out_%d_%d",
 527              ost->file_index, ost->index);
 528     ret = insert_trim(of->start_time, of->recording_time,
 529                       &last_filter, &pad_idx, name);
 530     if (ret < 0)
 531         return ret;
 532
 533
 534     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 535         return ret;
 536
 537     return 0;
 538 }
 539
 540 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 541 {
 542     OutputStream *ost = ofilter->ost;
 543     OutputFile    *of = output_files[ost->file_index];
 544     AVCodecContext *codec  = ost->enc_ctx;
 545     AVFilterContext *last_filter = out->filter_ctx;
 546     int pad_idx = out->pad_idx;
 547     char *sample_fmts, *sample_rates, *channel_layouts;
 548     char name[255];
 549     int ret;
 550
 551     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 552     ret = avfilter_graph_create_filter(&ofilter->filter,
 553                                        avfilter_get_by_name("abuffersink"),
 554                                        name, NULL, NULL, fg->graph);
 555     if (ret < 0)
 556         return ret;
 557     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 558         return ret;
 559
 560 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 561     AVFilterContext *filt_ctx;                                              \
 562                                                                             \
 563     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 564            "similarly to -af " filter_name "=%s.\n", arg);                  \
 565                                                                             \
 566     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 567                                        avfilter_get_by_name(filter_name),   \
 568                                        filter_name, arg, NULL, fg->graph);  \
 569     if (ret < 0)                                                            \
 570         return ret;                                                         \
 571                                                                             \
 572     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 573     if (ret < 0)                                                            \
 574         return ret;                                                         \
 575                                                                             \
 576     last_filter = filt_ctx;                                                 \
 577     pad_idx = 0;                                                            \
 578 } while (0)
 579     if (ost->audio_channels_mapped) {
 580         int i;
 581         AVBPrint pan_buf;
 582         av_bprint_init(&pan_buf, 256, 8192);
 583         av_bprintf(&pan_buf, "0x%"PRIx64,
 584                    av_get_default_channel_layout(ost->audio_channels_mapped));
 585         for (i = 0; i < ost->audio_channels_mapped; i++)
 586             if (ost->audio_channels_map[i] != -1)
 587                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 588
 589         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 590         av_bprint_finalize(&pan_buf, NULL);
 591     }
 592
 593     if (codec->channels && !codec->channel_layout)
 594         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 595
 596     sample_fmts     = choose_sample_fmts(ofilter);
 597     sample_rates    = choose_sample_rates(ofilter);
 598     channel_layouts = choose_channel_layouts(ofilter);
 599     if (sample_fmts || sample_rates || channel_layouts) {
 600         AVFilterContext *format;
 601         char args[256];
 602         args[0] = 0;
 603
 604         if (sample_fmts)
 605             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 606                             sample_fmts);
 607         if (sample_rates)
 608             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 609                             sample_rates);
 610         if (channel_layouts)
 611             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 612                             channel_layouts);
 613
 614         av_freep(&sample_fmts);
 615         av_freep(&sample_rates);
 616         av_freep(&channel_layouts);
 617
 618         snprintf(name, sizeof(name), "format_out_%d_%d",
 619                  ost->file_index, ost->index);
 620         ret = avfilter_graph_create_filter(&format,
 621                                            avfilter_get_by_name("aformat"),
 622                                            name, args, NULL, fg->graph);
 623         if (ret < 0)
 624             return ret;
 625
 626         ret = avfilter_link(last_filter, pad_idx, format, 0);
 627         if (ret < 0)
 628             return ret;
 629
 630         last_filter = format;
 631         pad_idx = 0;
 632     }
 633
 634     if (audio_volume != 256 && 0) {
 635         char args[256];
 636
 637         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 638         AUTO_INSERT_FILTER("-vol", "volume", args);
 639     }
 640
 641     if (ost->apad && of->shortest) {
 642         char args[256];
 643         int i;
 644
 645         for (i=0; i<of->ctx->nb_streams; i++)
 646             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 647                 break;
 648
 649         if (i<of->ctx->nb_streams) {
 650             snprintf(args, sizeof(args), "%s", ost->apad);
 651             AUTO_INSERT_FILTER("-apad", "apad", args);
 652         }
 653     }
 654
 655     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 656              ost->file_index, ost->index);
 657     ret = insert_trim(of->start_time, of->recording_time,
 658                       &last_filter, &pad_idx, name);
 659     if (ret < 0)
 660         return ret;
 661
 662     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 663         return ret;
 664
 665     return 0;
 666 }
 667
 668 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 669 {
 670     if (!ofilter->ost) {
 671         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 672         exit_program(1);
 673     }
 674
 675     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 676     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 677     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 678     default: av_assert0(0);
 679     }
 680 }
 681
 682 void check_filter_outputs(void)
 683 {
 684     int i;
 685     for (i = 0; i < nb_filtergraphs; i++) {
 686         int n;
 687         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 688             OutputFilter *output = filtergraphs[i]->outputs[n];
 689             if (!output->ost) {
 690                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 691                 exit_program(1);
 692             }
 693         }
 694     }
 695 }
 696
 697 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 698 {
 699     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 700     int i, w, h;
 701
 702     /* Compute the size of the canvas for the subtitles stream.
 703        If the subtitles codecpar has set a size, use it. Otherwise use the
 704        maximum dimensions of the video streams in the same file. */
 705     w = ifilter->width;
 706     h = ifilter->height;
 707     if (!(w && h)) {
 708         for (i = 0; i < avf->nb_streams; i++) {
 709             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 710                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 711                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 712             }
 713         }
 714         if (!(w && h)) {
 715             w = FFMAX(w, 720);
 716             h = FFMAX(h, 576);
 717         }
 718         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 719     }
 720     ist->sub2video.w = ifilter->width  = w;
 721     ist->sub2video.h = ifilter->height = h;
 722
 723     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 724     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 725
 726     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 727        palettes for all rectangles are identical or compatible */
 728     ifilter->format = AV_PIX_FMT_RGB32;
 729
 730     ist->sub2video.frame = av_frame_alloc();
 731     if (!ist->sub2video.frame)
 732         return AVERROR(ENOMEM);
 733     ist->sub2video.last_pts = INT64_MIN;
 734     return 0;
 735 }
 736
 737 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 738                                         AVFilterInOut *in)
 739 {
 740     AVFilterContext *last_filter;
 741     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 742     InputStream *ist = ifilter->ist;
 743     InputFile     *f = input_files[ist->file_index];
 744     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 745                                          ist->st->time_base;
 746     AVRational fr = ist->framerate;
 747     AVRational sar;
 748     AVBPrint args;
 749     char name[255];
 750     int ret, pad_idx = 0;
 751     int64_t tsoffset = 0;
 752     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 753
 754     if (!par)
 755         return AVERROR(ENOMEM);
 756     memset(par, 0, sizeof(*par));
 757     par->format = AV_PIX_FMT_NONE;
 758
 759     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 760         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 761         ret = AVERROR(EINVAL);
 762         goto fail;
 763     }
 764
 765     if (!fr.num)
 766         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 767
 768     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 769         ret = sub2video_prepare(ist, ifilter);
 770         if (ret < 0)
 771             goto fail;
 772     }
 773
 774     sar = ifilter->sample_aspect_ratio;
 775     if(!sar.den)
 776         sar = (AVRational){0,1};
 777     av_bprint_init(&args, 0, 1);
 778     av_bprintf(&args,
 779              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 780              "pixel_aspect=%d/%d:sws_param=flags=%d",
 781              ifilter->width, ifilter->height, ifilter->format,
 782              tb.num, tb.den, sar.num, sar.den,
 783              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
 784     if (fr.num && fr.den)
 785         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 786     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 787              ist->file_index, ist->st->index);
 788
 789
 790     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 791                                             args.str, NULL, fg->graph)) < 0)
 792         goto fail;
 793     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 794     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 795     if (ret < 0)
 796         goto fail;
 797     av_freep(&par);
 798     last_filter = ifilter->filter;
 799
 800     if (ist->autorotate) {
 801         double theta = get_rotation(ist->st);
 802
 803         if (fabs(theta - 90) < 1.0) {
 804             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 805         } else if (fabs(theta - 180) < 1.0) {
 806             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 807             if (ret < 0)
 808                 return ret;
 809             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 810         } else if (fabs(theta - 270) < 1.0) {
 811             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 812         } else if (fabs(theta) > 1.0) {
 813             char rotate_buf[64];
 814             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 815             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 816         }
 817         if (ret < 0)
 818             return ret;
 819     }
 820
 821     if (do_deinterlace) {
 822         AVFilterContext *yadif;
 823
 824         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 825                  ist->file_index, ist->st->index);
 826         if ((ret = avfilter_graph_create_filter(&yadif,
 827                                                 avfilter_get_by_name("yadif"),
 828                                                 name, "", NULL,
 829                                                 fg->graph)) < 0)
 830             return ret;
 831
 832         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 833             return ret;
 834
 835         last_filter = yadif;
 836     }
 837
 838     snprintf(name, sizeof(name), "trim_in_%d_%d",
 839              ist->file_index, ist->st->index);
 840     if (copy_ts) {
 841         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 842         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 843             tsoffset += f->ctx->start_time;
 844     }
 845     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 846                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 847                       &last_filter, &pad_idx, name);
 848     if (ret < 0)
 849         return ret;
 850
 851     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 852         return ret;
 853     return 0;
 854 fail:
 855     av_freep(&par);
 856
 857     return ret;
 858 }
 859
 860 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 861                                         AVFilterInOut *in)
 862 {
 863     AVFilterContext *last_filter;
 864     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 865     InputStream *ist = ifilter->ist;
 866     InputFile     *f = input_files[ist->file_index];
 867     AVBPrint args;
 868     char name[255];
 869     int ret, pad_idx = 0;
 870     int64_t tsoffset = 0;
 871
 872     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 873         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 874         return AVERROR(EINVAL);
 875     }
 876
 877     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 878     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 879              1, ifilter->sample_rate,
 880              ifilter->sample_rate,
 881              av_get_sample_fmt_name(ifilter->format));
 882     if (ifilter->channel_layout)
 883         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 884                    ifilter->channel_layout);
 885     else
 886         av_bprintf(&args, ":channels=%d", ifilter->channels);
 887     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 888              ist->file_index, ist->st->index);
 889
 890     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 891                                             name, args.str, NULL,
 892                                             fg->graph)) < 0)
 893         return ret;
 894     last_filter = ifilter->filter;
 895
 896 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 897     AVFilterContext *filt_ctx;                                              \
 898                                                                             \
 899     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 900            "similarly to -af " filter_name "=%s.\n", arg);                  \
 901                                                                             \
 902     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 903                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 904     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 905                                        avfilter_get_by_name(filter_name),   \
 906                                        name, arg, NULL, fg->graph);         \
 907     if (ret < 0)                                                            \
 908         return ret;                                                         \
 909                                                                             \
 910     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 911     if (ret < 0)                                                            \
 912         return ret;                                                         \
 913                                                                             \
 914     last_filter = filt_ctx;                                                 \
 915 } while (0)
 916
 917     if (audio_sync_method > 0) {
 918         char args[256] = {0};
 919
 920         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 921         if (audio_drift_threshold != 0.1)
 922             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 923         if (!fg->reconfiguration)
 924             av_strlcatf(args, sizeof(args), ":first_pts=0");
 925         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 926     }
 927
 928 //     if (ost->audio_channels_mapped) {
 929 //         int i;
 930 //         AVBPrint pan_buf;
 931 //         av_bprint_init(&pan_buf, 256, 8192);
 932 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 933 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 934 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 935 //             if (ost->audio_channels_map[i] != -1)
 936 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 937 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 938 //         av_bprint_finalize(&pan_buf, NULL);
 939 //     }
 940
 941     if (audio_volume != 256) {
 942         char args[256];
 943
 944         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 945                "audio filter instead.\n");
 946
 947         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 948         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 949     }
 950
 951     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 952              ist->file_index, ist->st->index);
 953     if (copy_ts) {
 954         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 955         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 956             tsoffset += f->ctx->start_time;
 957     }
 958     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 959                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 960                       &last_filter, &pad_idx, name);
 961     if (ret < 0)
 962         return ret;
 963
 964     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 965         return ret;
 966
 967     return 0;
 968 }
 969
 970 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 971                                   AVFilterInOut *in)
 972 {
 973     if (!ifilter->ist->dec) {
 974         av_log(NULL, AV_LOG_ERROR,
 975                "No decoder for stream #%d:%d, filtering impossible\n",
 976                ifilter->ist->file_index, ifilter->ist->st->index);
 977         return AVERROR_DECODER_NOT_FOUND;
 978     }
 979     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 980     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 981     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 982     default: av_assert0(0);
 983     }
 984 }
 985
 986 static void cleanup_filtergraph(FilterGraph *fg)
 987 {
 988     int i;
 989     for (i = 0; i < fg->nb_outputs; i++)
 990         fg->outputs[i]->filter = (AVFilterContext *)NULL;
 991     for (i = 0; i < fg->nb_inputs; i++)
 992         fg->inputs[i]->filter = (AVFilterContext *)NULL;
 993     avfilter_graph_free(&fg->graph);
 994 }
 995
 996 int configure_filtergraph(FilterGraph *fg)
 997 {
 998     AVFilterInOut *inputs, *outputs, *cur;
 999     int ret, i, simple = filtergraph_is_simple(fg);
1000     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1001                                       fg->graph_desc;
1002
1003     cleanup_filtergraph(fg);
1004     if (!(fg->graph = avfilter_graph_alloc()))
1005         return AVERROR(ENOMEM);
1006
1007     if (simple) {
1008         OutputStream *ost = fg->outputs[0]->ost;
1009         char args[512];
1010         AVDictionaryEntry *e = NULL;
1011
1012         fg->graph->nb_threads = filter_nbthreads;
1013
1014         args[0] = 0;
1015         while ((e = av_dict_get(ost->sws_dict, "", e,
1016                                 AV_DICT_IGNORE_SUFFIX))) {
1017             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1018         }
1019         if (strlen(args))
1020             args[strlen(args)-1] = 0;
1021         fg->graph->scale_sws_opts = av_strdup(args);
1022
1023         args[0] = 0;
1024         while ((e = av_dict_get(ost->swr_opts, "", e,
1025                                 AV_DICT_IGNORE_SUFFIX))) {
1026             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1027         }
1028         if (strlen(args))
1029             args[strlen(args)-1] = 0;
1030         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1031
1032         args[0] = '\0';
1033         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1034                                 AV_DICT_IGNORE_SUFFIX))) {
1035             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1036         }
1037         if (strlen(args))
1038             args[strlen(args) - 1] = '\0';
1039
1040         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1041         if (e)
1042             av_opt_set(fg->graph, "threads", e->value, 0);
1043     } else {
1044         fg->graph->nb_threads = filter_complex_nbthreads;
1045     }
1046
1047     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1048         goto fail;
1049
1050     if (filter_hw_device || hw_device_ctx) {
1051         AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1052                                                : hw_device_ctx;
1053         for (i = 0; i < fg->graph->nb_filters; i++) {
1054             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1055             if (!fg->graph->filters[i]->hw_device_ctx) {
1056                 ret = AVERROR(ENOMEM);
1057                 goto fail;
1058             }
1059         }
1060     }
1061
1062     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1063         const char *num_inputs;
1064         const char *num_outputs;
1065         if (!outputs) {
1066             num_outputs = "0";
1067         } else if (outputs->next) {
1068             num_outputs = ">1";
1069         } else {
1070             num_outputs = "1";
1071         }
1072         if (!inputs) {
1073             num_inputs = "0";
1074         } else if (inputs->next) {
1075             num_inputs = ">1";
1076         } else {
1077             num_inputs = "1";
1078         }
1079         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1080                "to have exactly 1 input and 1 output."
1081                " However, it had %s input(s) and %s output(s)."
1082                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1083                graph_desc, num_inputs, num_outputs);
1084         ret = AVERROR(EINVAL);
1085         goto fail;
1086     }
1087
1088     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1089         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1090             avfilter_inout_free(&inputs);
1091             avfilter_inout_free(&outputs);
1092             goto fail;
1093         }
1094     avfilter_inout_free(&inputs);
1095
1096     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1097         configure_output_filter(fg, fg->outputs[i], cur);
1098     avfilter_inout_free(&outputs);
1099
1100     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1101         goto fail;
1102
1103     /* limit the lists of allowed formats to the ones selected, to
1104      * make sure they stay the same if the filtergraph is reconfigured later */
1105     for (i = 0; i < fg->nb_outputs; i++) {
1106         OutputFilter *ofilter = fg->outputs[i];
1107         AVFilterContext *sink = ofilter->filter;
1108
1109         ofilter->format = av_buffersink_get_format(sink);
1110
1111         ofilter->width  = av_buffersink_get_w(sink);
1112         ofilter->height = av_buffersink_get_h(sink);
1113
1114         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1115         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1116     }
1117
1118     fg->reconfiguration = 1;
1119
1120     for (i = 0; i < fg->nb_outputs; i++) {
1121         OutputStream *ost = fg->outputs[i]->ost;
1122         if (!ost->enc) {
1123             /* identical to the same check in ffmpeg.c, needed because
1124                complex filter graphs are initialized earlier */
1125             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1126                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1127             ret = AVERROR(EINVAL);
1128             goto fail;
1129         }
1130         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1131             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1132             av_buffersink_set_frame_size(ost->filter->filter,
1133                                          ost->enc_ctx->frame_size);
1134     }
1135
1136     for (i = 0; i < fg->nb_inputs; i++) {
1137         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1138             AVFrame *tmp;
1139             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1140             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1141             av_frame_free(&tmp);
1142             if (ret < 0)
1143                 goto fail;
1144         }
1145     }
1146
1147     /* send the EOFs for the finished inputs */
1148     for (i = 0; i < fg->nb_inputs; i++) {
1149         if (fg->inputs[i]->eof) {
1150             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1151             if (ret < 0)
1152                 goto fail;
1153         }
1154     }
1155
1156     /* process queued up subtitle packets */
1157     for (i = 0; i < fg->nb_inputs; i++) {
1158         InputStream *ist = fg->inputs[i]->ist;
1159         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1160             while (av_fifo_size(ist->sub2video.sub_queue)) {
1161                 AVSubtitle tmp;
1162                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1163                 sub2video_update(ist, &tmp);
1164                 avsubtitle_free(&tmp);
1165             }
1166         }
1167     }
1168
1169     return 0;
1170
1171 fail:
1172     cleanup_filtergraph(fg);
1173     return ret;
1174 }
1175
1176 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1177 {
1178     av_buffer_unref(&ifilter->hw_frames_ctx);
1179
1180     ifilter->format = frame->format;
1181
1182     ifilter->width               = frame->width;
1183     ifilter->height              = frame->height;
1184     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1185
1186     ifilter->sample_rate         = frame->sample_rate;
1187     ifilter->channels            = frame->channels;
1188     ifilter->channel_layout      = frame->channel_layout;
1189
1190     if (frame->hw_frames_ctx) {
1191         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1192         if (!ifilter->hw_frames_ctx)
1193             return AVERROR(ENOMEM);
1194     }
1195
1196     return 0;
1197 }
1198
1199 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1200 {
1201     int i;
1202     for (i = 0; i < fg->nb_inputs; i++)
1203         if (fg->inputs[i]->ist == ist)
1204             return 1;
1205     return 0;
1206 }
1207
1208 int filtergraph_is_simple(FilterGraph *fg)
1209 {
1210     return !fg->graph_desc;
1211 }