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         //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
  69         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
  70         enum AVPixelFormat best= AV_PIX_FMT_NONE;
  71
  72         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
  73             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
  74         }
  75         for (; *p != AV_PIX_FMT_NONE; p++) {
  76             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
  77             if (*p == target)
  78                 break;
  79         }
  80         if (*p == AV_PIX_FMT_NONE) {
  81             if (target != AV_PIX_FMT_NONE)
  82                 av_log(NULL, AV_LOG_WARNING,
  83                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
  84                        av_get_pix_fmt_name(target),
  85                        codec->name,
  86                        av_get_pix_fmt_name(best));
  87             return best;
  88         }
  89     }
  90     return target;
  91 }
  92
  93 void choose_sample_fmt(AVStream *st, AVCodec *codec)
  94 {
  95     if (codec && codec->sample_fmts) {
  96         const enum AVSampleFormat *p = codec->sample_fmts;
  97         for (; *p != -1; p++) {
  98             if (*p == st->codecpar->format)
  99                 break;
 100         }
 101         if (*p == -1) {
 102             if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
 103                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
 104             if(av_get_sample_fmt_name(st->codecpar->format))
 105             av_log(NULL, AV_LOG_WARNING,
 106                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
 107                    av_get_sample_fmt_name(st->codecpar->format),
 108                    codec->name,
 109                    av_get_sample_fmt_name(codec->sample_fmts[0]));
 110             st->codecpar->format = codec->sample_fmts[0];
 111         }
 112     }
 113 }
 114
 115 static char *choose_pix_fmts(OutputFilter *ofilter)
 116 {
 117     OutputStream *ost = ofilter->ost;
 118     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
 119     if (strict_dict)
 120         // used by choose_pixel_fmt() and below
 121         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
 122
 123      if (ost->keep_pix_fmt) {
 124         avfilter_graph_set_auto_convert(ofilter->graph->graph,
 125                                             AVFILTER_AUTO_CONVERT_NONE);
 126         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 127             return NULL;
 128         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 129     }
 130     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 131         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 132     } else if (ost->enc && ost->enc->pix_fmts) {
 133         const enum AVPixelFormat *p;
 134         AVIOContext *s = NULL;
 135         uint8_t *ret;
 136         int len;
 137
 138         if (avio_open_dyn_buf(&s) < 0)
 139             exit_program(1);
 140
 141         p = ost->enc->pix_fmts;
 142         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
 143             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
 144         }
 145
 146         for (; *p != AV_PIX_FMT_NONE; p++) {
 147             const char *name = av_get_pix_fmt_name(*p);
 148             avio_printf(s, "%s|", name);
 149         }
 150         len = avio_close_dyn_buf(s, &ret);
 151         ret[len - 1] = 0;
 152         return ret;
 153     } else
 154         return NULL;
 155 }
 156
 157 /* Define a function for building a string containing a list of
 158  * allowed formats. */
 159 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 160 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 161 {                                                                              \
 162     if (ofilter->var != none) {                                                \
 163         get_name(ofilter->var);                                                \
 164         return av_strdup(name);                                                \
 165     } else if (ofilter->supported_list) {                                      \
 166         const type *p;                                                         \
 167         AVIOContext *s = NULL;                                                 \
 168         uint8_t *ret;                                                          \
 169         int len;                                                               \
 170                                                                                \
 171         if (avio_open_dyn_buf(&s) < 0)                                         \
 172             exit_program(1);                                                           \
 173                                                                                \
 174         for (p = ofilter->supported_list; *p != none; p++) {                   \
 175             get_name(*p);                                                      \
 176             avio_printf(s, "%s|", name);                                       \
 177         }                                                                      \
 178         len = avio_close_dyn_buf(s, &ret);                                     \
 179         ret[len - 1] = 0;                                                      \
 180         return ret;                                                            \
 181     } else                                                                     \
 182         return NULL;                                                           \
 183 }
 184
 185 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 186 //                  GET_PIX_FMT_NAME)
 187
 188 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 189                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 190
 191 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 192                   GET_SAMPLE_RATE_NAME)
 193
 194 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 195                   GET_CH_LAYOUT_NAME)
 196
 197 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 198 {
 199     FilterGraph *fg = av_mallocz(sizeof(*fg));
 200
 201     if (!fg)
 202         exit_program(1);
 203     fg->index = nb_filtergraphs;
 204
 205     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 206     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 207         exit_program(1);
 208     fg->outputs[0]->ost   = ost;
 209     fg->outputs[0]->graph = fg;
 210     fg->outputs[0]->format = -1;
 211
 212     ost->filter = fg->outputs[0];
 213
 214     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 215     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 216         exit_program(1);
 217     fg->inputs[0]->ist   = ist;
 218     fg->inputs[0]->graph = fg;
 219     fg->inputs[0]->format = -1;
 220
 221     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 222     if (!fg->inputs[0]->frame_queue)
 223         exit_program(1);
 224
 225     GROW_ARRAY(ist->filters, ist->nb_filters);
 226     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 227
 228     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 229     filtergraphs[nb_filtergraphs - 1] = fg;
 230
 231     return 0;
 232 }
 233
 234 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 235 {
 236     AVFilterContext *ctx = inout->filter_ctx;
 237     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 238     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 239     AVIOContext *pb;
 240     uint8_t *res = NULL;
 241
 242     if (avio_open_dyn_buf(&pb) < 0)
 243         exit_program(1);
 244
 245     avio_printf(pb, "%s", ctx->filter->name);
 246     if (nb_pads > 1)
 247         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 248     avio_w8(pb, 0);
 249     avio_close_dyn_buf(pb, &res);
 250     return res;
 251 }
 252
 253 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 254 {
 255     InputStream *ist = NULL;
 256     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 257     int i;
 258
 259     // TODO: support other filter types
 260     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 261         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 262                "currently.\n");
 263         exit_program(1);
 264     }
 265
 266     if (in->name) {
 267         AVFormatContext *s;
 268         AVStream       *st = NULL;
 269         char *p;
 270         int file_idx = strtol(in->name, &p, 0);
 271
 272         if (file_idx < 0 || file_idx >= nb_input_files) {
 273             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 274                    file_idx, fg->graph_desc);
 275             exit_program(1);
 276         }
 277         s = input_files[file_idx]->ctx;
 278
 279         for (i = 0; i < s->nb_streams; i++) {
 280             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 281             if (stream_type != type &&
 282                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 283                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 284                 continue;
 285             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 286                 st = s->streams[i];
 287                 break;
 288             }
 289         }
 290         if (!st) {
 291             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 292                    "matches no streams.\n", p, fg->graph_desc);
 293             exit_program(1);
 294         }
 295         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 296     } else {
 297         /* find the first unused stream of corresponding type */
 298         for (i = 0; i < nb_input_streams; i++) {
 299             ist = input_streams[i];
 300             if (ist->dec_ctx->codec_type == type && ist->discard)
 301                 break;
 302         }
 303         if (i == nb_input_streams) {
 304             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 305                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 306                    in->filter_ctx->name);
 307             exit_program(1);
 308         }
 309     }
 310     av_assert0(ist);
 311
 312     ist->discard         = 0;
 313     ist->decoding_needed |= DECODING_FOR_FILTER;
 314     ist->st->discard = AVDISCARD_NONE;
 315
 316     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 317     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 318         exit_program(1);
 319     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 320     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 321     fg->inputs[fg->nb_inputs - 1]->format = -1;
 322     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 323     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 324
 325     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 326     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 327         exit_program(1);
 328
 329     GROW_ARRAY(ist->filters, ist->nb_filters);
 330     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 331 }
 332
 333 int init_complex_filtergraph(FilterGraph *fg)
 334 {
 335     AVFilterInOut *inputs, *outputs, *cur;
 336     AVFilterGraph *graph;
 337     int ret = 0;
 338
 339     /* this graph is only used for determining the kinds of inputs
 340      * and outputs we have, and is discarded on exit from this function */
 341     graph = avfilter_graph_alloc();
 342     if (!graph)
 343         return AVERROR(ENOMEM);
 344     graph->nb_threads = 1;
 345
 346     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 347     if (ret < 0)
 348         goto fail;
 349
 350     for (cur = inputs; cur; cur = cur->next)
 351         init_input_filter(fg, cur);
 352
 353     for (cur = outputs; cur;) {
 354         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 355         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 356         if (!fg->outputs[fg->nb_outputs - 1])
 357             exit_program(1);
 358
 359         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 360         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 361         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 362                                                                          cur->pad_idx);
 363         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 364         cur = cur->next;
 365         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 366     }
 367
 368 fail:
 369     avfilter_inout_free(&inputs);
 370     avfilter_graph_free(&graph);
 371     return ret;
 372 }
 373
 374 static int insert_trim(int64_t start_time, int64_t duration,
 375                        AVFilterContext **last_filter, int *pad_idx,
 376                        const char *filter_name)
 377 {
 378     AVFilterGraph *graph = (*last_filter)->graph;
 379     AVFilterContext *ctx;
 380     const AVFilter *trim;
 381     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 382     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 383     int ret = 0;
 384
 385     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 386         return 0;
 387
 388     trim = avfilter_get_by_name(name);
 389     if (!trim) {
 390         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 391                "recording time.\n", name);
 392         return AVERROR_FILTER_NOT_FOUND;
 393     }
 394
 395     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 396     if (!ctx)
 397         return AVERROR(ENOMEM);
 398
 399     if (duration != INT64_MAX) {
 400         ret = av_opt_set_int(ctx, "durationi", duration,
 401                                 AV_OPT_SEARCH_CHILDREN);
 402     }
 403     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 404         ret = av_opt_set_int(ctx, "starti", start_time,
 405                                 AV_OPT_SEARCH_CHILDREN);
 406     }
 407     if (ret < 0) {
 408         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 409         return ret;
 410     }
 411
 412     ret = avfilter_init_str(ctx, NULL);
 413     if (ret < 0)
 414         return ret;
 415
 416     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 417     if (ret < 0)
 418         return ret;
 419
 420     *last_filter = ctx;
 421     *pad_idx     = 0;
 422     return 0;
 423 }
 424
 425 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 426                          const char *filter_name, const char *args)
 427 {
 428     AVFilterGraph *graph = (*last_filter)->graph;
 429     AVFilterContext *ctx;
 430     int ret;
 431
 432     ret = avfilter_graph_create_filter(&ctx,
 433                                        avfilter_get_by_name(filter_name),
 434                                        filter_name, args, NULL, graph);
 435     if (ret < 0)
 436         return ret;
 437
 438     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 439     if (ret < 0)
 440         return ret;
 441
 442     *last_filter = ctx;
 443     *pad_idx     = 0;
 444     return 0;
 445 }
 446
 447 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 448 {
 449     char *pix_fmts;
 450     OutputStream *ost = ofilter->ost;
 451     OutputFile    *of = output_files[ost->file_index];
 452     AVFilterContext *last_filter = out->filter_ctx;
 453     int pad_idx = out->pad_idx;
 454     int ret;
 455     char name[255];
 456
 457     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 458     ret = avfilter_graph_create_filter(&ofilter->filter,
 459                                        avfilter_get_by_name("buffersink"),
 460                                        name, NULL, NULL, fg->graph);
 461
 462     if (ret < 0)
 463         return ret;
 464
 465     if (ofilter->width || ofilter->height) {
 466         char args[255];
 467         AVFilterContext *filter;
 468         AVDictionaryEntry *e = NULL;
 469
 470         snprintf(args, sizeof(args), "%d:%d",
 471                  ofilter->width, ofilter->height);
 472
 473         while ((e = av_dict_get(ost->sws_dict, "", e,
 474                                 AV_DICT_IGNORE_SUFFIX))) {
 475             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 476         }
 477
 478         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 479                  ost->file_index, ost->index);
 480         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 481                                                 name, args, NULL, fg->graph)) < 0)
 482             return ret;
 483         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 484             return ret;
 485
 486         last_filter = filter;
 487         pad_idx = 0;
 488     }
 489
 490     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 491         AVFilterContext *filter;
 492         snprintf(name, sizeof(name), "format_out_%d_%d",
 493                  ost->file_index, ost->index);
 494         ret = avfilter_graph_create_filter(&filter,
 495                                            avfilter_get_by_name("format"),
 496                                            "format", pix_fmts, NULL, fg->graph);
 497         av_freep(&pix_fmts);
 498         if (ret < 0)
 499             return ret;
 500         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 501             return ret;
 502
 503         last_filter = filter;
 504         pad_idx     = 0;
 505     }
 506
 507     if (ost->frame_rate.num && 0) {
 508         AVFilterContext *fps;
 509         char args[255];
 510
 511         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 512                  ost->frame_rate.den);
 513         snprintf(name, sizeof(name), "fps_out_%d_%d",
 514                  ost->file_index, ost->index);
 515         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 516                                            name, args, NULL, fg->graph);
 517         if (ret < 0)
 518             return ret;
 519
 520         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 521         if (ret < 0)
 522             return ret;
 523         last_filter = fps;
 524         pad_idx = 0;
 525     }
 526
 527     snprintf(name, sizeof(name), "trim_out_%d_%d",
 528              ost->file_index, ost->index);
 529     ret = insert_trim(of->start_time, of->recording_time,
 530                       &last_filter, &pad_idx, name);
 531     if (ret < 0)
 532         return ret;
 533
 534
 535     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 536         return ret;
 537
 538     return 0;
 539 }
 540
 541 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 542 {
 543     OutputStream *ost = ofilter->ost;
 544     OutputFile    *of = output_files[ost->file_index];
 545     AVCodecContext *codec  = ost->enc_ctx;
 546     AVFilterContext *last_filter = out->filter_ctx;
 547     int pad_idx = out->pad_idx;
 548     char *sample_fmts, *sample_rates, *channel_layouts;
 549     char name[255];
 550     int ret;
 551
 552     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 553     ret = avfilter_graph_create_filter(&ofilter->filter,
 554                                        avfilter_get_by_name("abuffersink"),
 555                                        name, NULL, NULL, fg->graph);
 556     if (ret < 0)
 557         return ret;
 558     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 559         return ret;
 560
 561 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 562     AVFilterContext *filt_ctx;                                              \
 563                                                                             \
 564     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 565            "similarly to -af " filter_name "=%s.\n", arg);                  \
 566                                                                             \
 567     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 568                                        avfilter_get_by_name(filter_name),   \
 569                                        filter_name, arg, NULL, fg->graph);  \
 570     if (ret < 0)                                                            \
 571         return ret;                                                         \
 572                                                                             \
 573     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 574     if (ret < 0)                                                            \
 575         return ret;                                                         \
 576                                                                             \
 577     last_filter = filt_ctx;                                                 \
 578     pad_idx = 0;                                                            \
 579 } while (0)
 580     if (ost->audio_channels_mapped) {
 581         int i;
 582         AVBPrint pan_buf;
 583         av_bprint_init(&pan_buf, 256, 8192);
 584         av_bprintf(&pan_buf, "0x%"PRIx64,
 585                    av_get_default_channel_layout(ost->audio_channels_mapped));
 586         for (i = 0; i < ost->audio_channels_mapped; i++)
 587             if (ost->audio_channels_map[i] != -1)
 588                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 589
 590         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 591         av_bprint_finalize(&pan_buf, NULL);
 592     }
 593
 594     if (codec->channels && !codec->channel_layout)
 595         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 596
 597     sample_fmts     = choose_sample_fmts(ofilter);
 598     sample_rates    = choose_sample_rates(ofilter);
 599     channel_layouts = choose_channel_layouts(ofilter);
 600     if (sample_fmts || sample_rates || channel_layouts) {
 601         AVFilterContext *format;
 602         char args[256];
 603         args[0] = 0;
 604
 605         if (sample_fmts)
 606             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 607                             sample_fmts);
 608         if (sample_rates)
 609             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 610                             sample_rates);
 611         if (channel_layouts)
 612             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 613                             channel_layouts);
 614
 615         av_freep(&sample_fmts);
 616         av_freep(&sample_rates);
 617         av_freep(&channel_layouts);
 618
 619         snprintf(name, sizeof(name), "format_out_%d_%d",
 620                  ost->file_index, ost->index);
 621         ret = avfilter_graph_create_filter(&format,
 622                                            avfilter_get_by_name("aformat"),
 623                                            name, args, NULL, fg->graph);
 624         if (ret < 0)
 625             return ret;
 626
 627         ret = avfilter_link(last_filter, pad_idx, format, 0);
 628         if (ret < 0)
 629             return ret;
 630
 631         last_filter = format;
 632         pad_idx = 0;
 633     }
 634
 635     if (audio_volume != 256 && 0) {
 636         char args[256];
 637
 638         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 639         AUTO_INSERT_FILTER("-vol", "volume", args);
 640     }
 641
 642     if (ost->apad && of->shortest) {
 643         char args[256];
 644         int i;
 645
 646         for (i=0; i<of->ctx->nb_streams; i++)
 647             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 648                 break;
 649
 650         if (i<of->ctx->nb_streams) {
 651             snprintf(args, sizeof(args), "%s", ost->apad);
 652             AUTO_INSERT_FILTER("-apad", "apad", args);
 653         }
 654     }
 655
 656     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 657              ost->file_index, ost->index);
 658     ret = insert_trim(of->start_time, of->recording_time,
 659                       &last_filter, &pad_idx, name);
 660     if (ret < 0)
 661         return ret;
 662
 663     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 664         return ret;
 665
 666     return 0;
 667 }
 668
 669 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 670 {
 671     if (!ofilter->ost) {
 672         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 673         exit_program(1);
 674     }
 675
 676     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 677     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 678     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 679     default: av_assert0(0);
 680     }
 681 }
 682
 683 void check_filter_outputs(void)
 684 {
 685     int i;
 686     for (i = 0; i < nb_filtergraphs; i++) {
 687         int n;
 688         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 689             OutputFilter *output = filtergraphs[i]->outputs[n];
 690             if (!output->ost) {
 691                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 692                 exit_program(1);
 693             }
 694         }
 695     }
 696 }
 697
 698 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 699 {
 700     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 701     int i, w, h;
 702
 703     /* Compute the size of the canvas for the subtitles stream.
 704        If the subtitles codecpar has set a size, use it. Otherwise use the
 705        maximum dimensions of the video streams in the same file. */
 706     w = ifilter->width;
 707     h = ifilter->height;
 708     if (!(w && h)) {
 709         for (i = 0; i < avf->nb_streams; i++) {
 710             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 711                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 712                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 713             }
 714         }
 715         if (!(w && h)) {
 716             w = FFMAX(w, 720);
 717             h = FFMAX(h, 576);
 718         }
 719         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 720     }
 721     ist->sub2video.w = ifilter->width  = w;
 722     ist->sub2video.h = ifilter->height = h;
 723
 724     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 725     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 726
 727     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 728        palettes for all rectangles are identical or compatible */
 729     ifilter->format = AV_PIX_FMT_RGB32;
 730
 731     ist->sub2video.frame = av_frame_alloc();
 732     if (!ist->sub2video.frame)
 733         return AVERROR(ENOMEM);
 734     ist->sub2video.last_pts = INT64_MIN;
 735     return 0;
 736 }
 737
 738 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 739                                         AVFilterInOut *in)
 740 {
 741     AVFilterContext *last_filter;
 742     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 743     InputStream *ist = ifilter->ist;
 744     InputFile     *f = input_files[ist->file_index];
 745     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 746                                          ist->st->time_base;
 747     AVRational fr = ist->framerate;
 748     AVRational sar;
 749     AVBPrint args;
 750     char name[255];
 751     int ret, pad_idx = 0;
 752     int64_t tsoffset = 0;
 753     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 754
 755     if (!par)
 756         return AVERROR(ENOMEM);
 757     memset(par, 0, sizeof(*par));
 758     par->format = AV_PIX_FMT_NONE;
 759
 760     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 761         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 762         ret = AVERROR(EINVAL);
 763         goto fail;
 764     }
 765
 766     if (!fr.num)
 767         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 768
 769     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 770         ret = sub2video_prepare(ist, ifilter);
 771         if (ret < 0)
 772             goto fail;
 773     }
 774
 775     sar = ifilter->sample_aspect_ratio;
 776     if(!sar.den)
 777         sar = (AVRational){0,1};
 778     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 779     av_bprintf(&args,
 780              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 781              "pixel_aspect=%d/%d:sws_param=flags=%d",
 782              ifilter->width, ifilter->height, ifilter->format,
 783              tb.num, tb.den, sar.num, sar.den,
 784              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
 785     if (fr.num && fr.den)
 786         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 787     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 788              ist->file_index, ist->st->index);
 789
 790
 791     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 792                                             args.str, NULL, fg->graph)) < 0)
 793         goto fail;
 794     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 795     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 796     if (ret < 0)
 797         goto fail;
 798     av_freep(&par);
 799     last_filter = ifilter->filter;
 800
 801     if (ist->autorotate) {
 802         double theta = get_rotation(ist->st);
 803
 804         if (fabs(theta - 90) < 1.0) {
 805             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 806         } else if (fabs(theta - 180) < 1.0) {
 807             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 808             if (ret < 0)
 809                 return ret;
 810             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 811         } else if (fabs(theta - 270) < 1.0) {
 812             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 813         } else if (fabs(theta) > 1.0) {
 814             char rotate_buf[64];
 815             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 816             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 817         }
 818         if (ret < 0)
 819             return ret;
 820     }
 821
 822     if (do_deinterlace) {
 823         AVFilterContext *yadif;
 824
 825         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 826                  ist->file_index, ist->st->index);
 827         if ((ret = avfilter_graph_create_filter(&yadif,
 828                                                 avfilter_get_by_name("yadif"),
 829                                                 name, "", NULL,
 830                                                 fg->graph)) < 0)
 831             return ret;
 832
 833         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 834             return ret;
 835
 836         last_filter = yadif;
 837     }
 838
 839     snprintf(name, sizeof(name), "trim_in_%d_%d",
 840              ist->file_index, ist->st->index);
 841     if (copy_ts) {
 842         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 843         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 844             tsoffset += f->ctx->start_time;
 845     }
 846     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 847                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 848                       &last_filter, &pad_idx, name);
 849     if (ret < 0)
 850         return ret;
 851
 852     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 853         return ret;
 854     return 0;
 855 fail:
 856     av_freep(&par);
 857
 858     return ret;
 859 }
 860
 861 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 862                                         AVFilterInOut *in)
 863 {
 864     AVFilterContext *last_filter;
 865     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 866     InputStream *ist = ifilter->ist;
 867     InputFile     *f = input_files[ist->file_index];
 868     AVBPrint args;
 869     char name[255];
 870     int ret, pad_idx = 0;
 871     int64_t tsoffset = 0;
 872
 873     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 874         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 875         return AVERROR(EINVAL);
 876     }
 877
 878     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 879     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 880              1, ifilter->sample_rate,
 881              ifilter->sample_rate,
 882              av_get_sample_fmt_name(ifilter->format));
 883     if (ifilter->channel_layout)
 884         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 885                    ifilter->channel_layout);
 886     else
 887         av_bprintf(&args, ":channels=%d", ifilter->channels);
 888     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 889              ist->file_index, ist->st->index);
 890
 891     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 892                                             name, args.str, NULL,
 893                                             fg->graph)) < 0)
 894         return ret;
 895     last_filter = ifilter->filter;
 896
 897 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 898     AVFilterContext *filt_ctx;                                              \
 899                                                                             \
 900     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 901            "similarly to -af " filter_name "=%s.\n", arg);                  \
 902                                                                             \
 903     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 904                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 905     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 906                                        avfilter_get_by_name(filter_name),   \
 907                                        name, arg, NULL, fg->graph);         \
 908     if (ret < 0)                                                            \
 909         return ret;                                                         \
 910                                                                             \
 911     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 912     if (ret < 0)                                                            \
 913         return ret;                                                         \
 914                                                                             \
 915     last_filter = filt_ctx;                                                 \
 916 } while (0)
 917
 918     if (audio_sync_method > 0) {
 919         char args[256] = {0};
 920
 921         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 922         if (audio_drift_threshold != 0.1)
 923             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 924         if (!fg->reconfiguration)
 925             av_strlcatf(args, sizeof(args), ":first_pts=0");
 926         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 927     }
 928
 929 //     if (ost->audio_channels_mapped) {
 930 //         int i;
 931 //         AVBPrint pan_buf;
 932 //         av_bprint_init(&pan_buf, 256, 8192);
 933 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 934 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 935 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 936 //             if (ost->audio_channels_map[i] != -1)
 937 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 938 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 939 //         av_bprint_finalize(&pan_buf, NULL);
 940 //     }
 941
 942     if (audio_volume != 256) {
 943         char args[256];
 944
 945         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 946                "audio filter instead.\n");
 947
 948         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 949         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 950     }
 951
 952     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 953              ist->file_index, ist->st->index);
 954     if (copy_ts) {
 955         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 956         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 957             tsoffset += f->ctx->start_time;
 958     }
 959     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 960                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 961                       &last_filter, &pad_idx, name);
 962     if (ret < 0)
 963         return ret;
 964
 965     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 966         return ret;
 967
 968     return 0;
 969 }
 970
 971 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 972                                   AVFilterInOut *in)
 973 {
 974     if (!ifilter->ist->dec) {
 975         av_log(NULL, AV_LOG_ERROR,
 976                "No decoder for stream #%d:%d, filtering impossible\n",
 977                ifilter->ist->file_index, ifilter->ist->st->index);
 978         return AVERROR_DECODER_NOT_FOUND;
 979     }
 980     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 981     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 982     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 983     default: av_assert0(0);
 984     }
 985 }
 986
 987 static void cleanup_filtergraph(FilterGraph *fg)
 988 {
 989     int i;
 990     for (i = 0; i < fg->nb_outputs; i++)
 991         fg->outputs[i]->filter = (AVFilterContext *)NULL;
 992     for (i = 0; i < fg->nb_inputs; i++)
 993         fg->inputs[i]->filter = (AVFilterContext *)NULL;
 994     avfilter_graph_free(&fg->graph);
 995 }
 996
 997 int configure_filtergraph(FilterGraph *fg)
 998 {
 999     AVFilterInOut *inputs, *outputs, *cur;
1000     int ret, i, simple = filtergraph_is_simple(fg);
1001     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1002                                       fg->graph_desc;
1003
1004     cleanup_filtergraph(fg);
1005     if (!(fg->graph = avfilter_graph_alloc()))
1006         return AVERROR(ENOMEM);
1007
1008     if (simple) {
1009         OutputStream *ost = fg->outputs[0]->ost;
1010         char args[512];
1011         AVDictionaryEntry *e = NULL;
1012
1013         fg->graph->nb_threads = filter_nbthreads;
1014
1015         args[0] = 0;
1016         while ((e = av_dict_get(ost->sws_dict, "", e,
1017                                 AV_DICT_IGNORE_SUFFIX))) {
1018             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1019         }
1020         if (strlen(args))
1021             args[strlen(args)-1] = 0;
1022         fg->graph->scale_sws_opts = av_strdup(args);
1023
1024         args[0] = 0;
1025         while ((e = av_dict_get(ost->swr_opts, "", e,
1026                                 AV_DICT_IGNORE_SUFFIX))) {
1027             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1028         }
1029         if (strlen(args))
1030             args[strlen(args)-1] = 0;
1031         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1032
1033         args[0] = '\0';
1034         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1035                                 AV_DICT_IGNORE_SUFFIX))) {
1036             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1037         }
1038         if (strlen(args))
1039             args[strlen(args) - 1] = '\0';
1040
1041         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1042         if (e)
1043             av_opt_set(fg->graph, "threads", e->value, 0);
1044     } else {
1045         fg->graph->nb_threads = filter_complex_nbthreads;
1046     }
1047
1048     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1049         goto fail;
1050
1051     if (filter_hw_device || hw_device_ctx) {
1052         AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1053                                                : hw_device_ctx;
1054         for (i = 0; i < fg->graph->nb_filters; i++) {
1055             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1056             if (!fg->graph->filters[i]->hw_device_ctx) {
1057                 ret = AVERROR(ENOMEM);
1058                 goto fail;
1059             }
1060         }
1061     }
1062
1063     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1064         const char *num_inputs;
1065         const char *num_outputs;
1066         if (!outputs) {
1067             num_outputs = "0";
1068         } else if (outputs->next) {
1069             num_outputs = ">1";
1070         } else {
1071             num_outputs = "1";
1072         }
1073         if (!inputs) {
1074             num_inputs = "0";
1075         } else if (inputs->next) {
1076             num_inputs = ">1";
1077         } else {
1078             num_inputs = "1";
1079         }
1080         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1081                "to have exactly 1 input and 1 output."
1082                " However, it had %s input(s) and %s output(s)."
1083                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1084                graph_desc, num_inputs, num_outputs);
1085         ret = AVERROR(EINVAL);
1086         goto fail;
1087     }
1088
1089     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1090         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1091             avfilter_inout_free(&inputs);
1092             avfilter_inout_free(&outputs);
1093             goto fail;
1094         }
1095     avfilter_inout_free(&inputs);
1096
1097     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1098         configure_output_filter(fg, fg->outputs[i], cur);
1099     avfilter_inout_free(&outputs);
1100
1101     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1102         goto fail;
1103
1104     /* limit the lists of allowed formats to the ones selected, to
1105      * make sure they stay the same if the filtergraph is reconfigured later */
1106     for (i = 0; i < fg->nb_outputs; i++) {
1107         OutputFilter *ofilter = fg->outputs[i];
1108         AVFilterContext *sink = ofilter->filter;
1109
1110         ofilter->format = av_buffersink_get_format(sink);
1111
1112         ofilter->width  = av_buffersink_get_w(sink);
1113         ofilter->height = av_buffersink_get_h(sink);
1114
1115         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1116         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1117     }
1118
1119     fg->reconfiguration = 1;
1120
1121     for (i = 0; i < fg->nb_outputs; i++) {
1122         OutputStream *ost = fg->outputs[i]->ost;
1123         if (!ost->enc) {
1124             /* identical to the same check in ffmpeg.c, needed because
1125                complex filter graphs are initialized earlier */
1126             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1127                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1128             ret = AVERROR(EINVAL);
1129             goto fail;
1130         }
1131         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1132             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1133             av_buffersink_set_frame_size(ost->filter->filter,
1134                                          ost->enc_ctx->frame_size);
1135     }
1136
1137     for (i = 0; i < fg->nb_inputs; i++) {
1138         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1139             AVFrame *tmp;
1140             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1141             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1142             av_frame_free(&tmp);
1143             if (ret < 0)
1144                 goto fail;
1145         }
1146     }
1147
1148     /* send the EOFs for the finished inputs */
1149     for (i = 0; i < fg->nb_inputs; i++) {
1150         if (fg->inputs[i]->eof) {
1151             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1152             if (ret < 0)
1153                 goto fail;
1154         }
1155     }
1156
1157     /* process queued up subtitle packets */
1158     for (i = 0; i < fg->nb_inputs; i++) {
1159         InputStream *ist = fg->inputs[i]->ist;
1160         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1161             while (av_fifo_size(ist->sub2video.sub_queue)) {
1162                 AVSubtitle tmp;
1163                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1164                 sub2video_update(ist, &tmp);
1165                 avsubtitle_free(&tmp);
1166             }
1167         }
1168     }
1169
1170     return 0;
1171
1172 fail:
1173     cleanup_filtergraph(fg);
1174     return ret;
1175 }
1176
1177 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1178 {
1179     av_buffer_unref(&ifilter->hw_frames_ctx);
1180
1181     ifilter->format = frame->format;
1182
1183     ifilter->width               = frame->width;
1184     ifilter->height              = frame->height;
1185     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1186
1187     ifilter->sample_rate         = frame->sample_rate;
1188     ifilter->channels            = frame->channels;
1189     ifilter->channel_layout      = frame->channel_layout;
1190
1191     if (frame->hw_frames_ctx) {
1192         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1193         if (!ifilter->hw_frames_ctx)
1194             return AVERROR(ENOMEM);
1195     }
1196
1197     return 0;
1198 }
1199
1200 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1201 {
1202     int i;
1203     for (i = 0; i < fg->nb_inputs; i++)
1204         if (fg->inputs[i]->ist == ist)
1205             return 1;
1206     return 0;
1207 }
1208
1209 int filtergraph_is_simple(FilterGraph *fg)
1210 {
1211     return !fg->graph_desc;
1212 }