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             const AVCodecDescriptor *desc = avcodec_descriptor_get(codec->id);
 103             if(desc && (desc->props & AV_CODEC_PROP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
 104                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
 105             if(av_get_sample_fmt_name(st->codecpar->format))
 106             av_log(NULL, AV_LOG_WARNING,
 107                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
 108                    av_get_sample_fmt_name(st->codecpar->format),
 109                    codec->name,
 110                    av_get_sample_fmt_name(codec->sample_fmts[0]));
 111             st->codecpar->format = codec->sample_fmts[0];
 112         }
 113     }
 114 }
 115
 116 static char *choose_pix_fmts(OutputFilter *ofilter)
 117 {
 118     OutputStream *ost = ofilter->ost;
 119     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
 120     if (strict_dict)
 121         // used by choose_pixel_fmt() and below
 122         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
 123
 124      if (ost->keep_pix_fmt) {
 125         avfilter_graph_set_auto_convert(ofilter->graph->graph,
 126                                             AVFILTER_AUTO_CONVERT_NONE);
 127         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 128             return NULL;
 129         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 130     }
 131     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 132         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 133     } else if (ost->enc && ost->enc->pix_fmts) {
 134         const enum AVPixelFormat *p;
 135         AVIOContext *s = NULL;
 136         uint8_t *ret;
 137         int len;
 138
 139         if (avio_open_dyn_buf(&s) < 0)
 140             exit_program(1);
 141
 142         p = ost->enc->pix_fmts;
 143         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
 144             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
 145         }
 146
 147         for (; *p != AV_PIX_FMT_NONE; p++) {
 148             const char *name = av_get_pix_fmt_name(*p);
 149             avio_printf(s, "%s|", name);
 150         }
 151         len = avio_close_dyn_buf(s, &ret);
 152         ret[len - 1] = 0;
 153         return ret;
 154     } else
 155         return NULL;
 156 }
 157
 158 /* Define a function for building a string containing a list of
 159  * allowed formats. */
 160 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 161 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 162 {                                                                              \
 163     if (ofilter->var != none) {                                                \
 164         get_name(ofilter->var);                                                \
 165         return av_strdup(name);                                                \
 166     } else if (ofilter->supported_list) {                                      \
 167         const type *p;                                                         \
 168         AVIOContext *s = NULL;                                                 \
 169         uint8_t *ret;                                                          \
 170         int len;                                                               \
 171                                                                                \
 172         if (avio_open_dyn_buf(&s) < 0)                                         \
 173             exit_program(1);                                                           \
 174                                                                                \
 175         for (p = ofilter->supported_list; *p != none; p++) {                   \
 176             get_name(*p);                                                      \
 177             avio_printf(s, "%s|", name);                                       \
 178         }                                                                      \
 179         len = avio_close_dyn_buf(s, &ret);                                     \
 180         ret[len - 1] = 0;                                                      \
 181         return ret;                                                            \
 182     } else                                                                     \
 183         return NULL;                                                           \
 184 }
 185
 186 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 187 //                  GET_PIX_FMT_NAME)
 188
 189 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 190                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 191
 192 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 193                   GET_SAMPLE_RATE_NAME)
 194
 195 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 196                   GET_CH_LAYOUT_NAME)
 197
 198 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 199 {
 200     FilterGraph *fg = av_mallocz(sizeof(*fg));
 201
 202     if (!fg)
 203         exit_program(1);
 204     fg->index = nb_filtergraphs;
 205
 206     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 207     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 208         exit_program(1);
 209     fg->outputs[0]->ost   = ost;
 210     fg->outputs[0]->graph = fg;
 211     fg->outputs[0]->format = -1;
 212
 213     ost->filter = fg->outputs[0];
 214
 215     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 216     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 217         exit_program(1);
 218     fg->inputs[0]->ist   = ist;
 219     fg->inputs[0]->graph = fg;
 220     fg->inputs[0]->format = -1;
 221
 222     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 223     if (!fg->inputs[0]->frame_queue)
 224         exit_program(1);
 225
 226     GROW_ARRAY(ist->filters, ist->nb_filters);
 227     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 228
 229     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 230     filtergraphs[nb_filtergraphs - 1] = fg;
 231
 232     return 0;
 233 }
 234
 235 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 236 {
 237     AVFilterContext *ctx = inout->filter_ctx;
 238     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 239     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 240     AVIOContext *pb;
 241     uint8_t *res = NULL;
 242
 243     if (avio_open_dyn_buf(&pb) < 0)
 244         exit_program(1);
 245
 246     avio_printf(pb, "%s", ctx->filter->name);
 247     if (nb_pads > 1)
 248         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 249     avio_w8(pb, 0);
 250     avio_close_dyn_buf(pb, &res);
 251     return res;
 252 }
 253
 254 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 255 {
 256     InputStream *ist = NULL;
 257     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 258     int i;
 259
 260     // TODO: support other filter types
 261     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 262         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 263                "currently.\n");
 264         exit_program(1);
 265     }
 266
 267     if (in->name) {
 268         AVFormatContext *s;
 269         AVStream       *st = NULL;
 270         char *p;
 271         int file_idx = strtol(in->name, &p, 0);
 272
 273         if (file_idx < 0 || file_idx >= nb_input_files) {
 274             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 275                    file_idx, fg->graph_desc);
 276             exit_program(1);
 277         }
 278         s = input_files[file_idx]->ctx;
 279
 280         for (i = 0; i < s->nb_streams; i++) {
 281             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 282             if (stream_type != type &&
 283                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 284                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 285                 continue;
 286             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 287                 st = s->streams[i];
 288                 break;
 289             }
 290         }
 291         if (!st) {
 292             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 293                    "matches no streams.\n", p, fg->graph_desc);
 294             exit_program(1);
 295         }
 296         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 297         if (ist->user_set_discard == AVDISCARD_ALL) {
 298             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 299                    "matches a disabled input stream.\n", p, fg->graph_desc);
 300             exit_program(1);
 301         }
 302     } else {
 303         /* find the first unused stream of corresponding type */
 304         for (i = 0; i < nb_input_streams; i++) {
 305             ist = input_streams[i];
 306             if (ist->user_set_discard == AVDISCARD_ALL)
 307                 continue;
 308             if (ist->dec_ctx->codec_type == type && ist->discard)
 309                 break;
 310         }
 311         if (i == nb_input_streams) {
 312             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 313                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 314                    in->filter_ctx->name);
 315             exit_program(1);
 316         }
 317     }
 318     av_assert0(ist);
 319
 320     ist->discard         = 0;
 321     ist->decoding_needed |= DECODING_FOR_FILTER;
 322     ist->st->discard = AVDISCARD_NONE;
 323
 324     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 325     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 326         exit_program(1);
 327     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 328     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 329     fg->inputs[fg->nb_inputs - 1]->format = -1;
 330     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 331     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 332
 333     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 334     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 335         exit_program(1);
 336
 337     GROW_ARRAY(ist->filters, ist->nb_filters);
 338     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 339 }
 340
 341 int init_complex_filtergraph(FilterGraph *fg)
 342 {
 343     AVFilterInOut *inputs, *outputs, *cur;
 344     AVFilterGraph *graph;
 345     int ret = 0;
 346
 347     /* this graph is only used for determining the kinds of inputs
 348      * and outputs we have, and is discarded on exit from this function */
 349     graph = avfilter_graph_alloc();
 350     if (!graph)
 351         return AVERROR(ENOMEM);
 352     graph->nb_threads = 1;
 353
 354     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 355     if (ret < 0)
 356         goto fail;
 357
 358     for (cur = inputs; cur; cur = cur->next)
 359         init_input_filter(fg, cur);
 360
 361     for (cur = outputs; cur;) {
 362         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 363         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 364         if (!fg->outputs[fg->nb_outputs - 1])
 365             exit_program(1);
 366
 367         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 368         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 369         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 370                                                                          cur->pad_idx);
 371         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 372         cur = cur->next;
 373         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 374     }
 375
 376 fail:
 377     avfilter_inout_free(&inputs);
 378     avfilter_graph_free(&graph);
 379     return ret;
 380 }
 381
 382 static int insert_trim(int64_t start_time, int64_t duration,
 383                        AVFilterContext **last_filter, int *pad_idx,
 384                        const char *filter_name)
 385 {
 386     AVFilterGraph *graph = (*last_filter)->graph;
 387     AVFilterContext *ctx;
 388     const AVFilter *trim;
 389     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 390     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 391     int ret = 0;
 392
 393     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 394         return 0;
 395
 396     trim = avfilter_get_by_name(name);
 397     if (!trim) {
 398         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 399                "recording time.\n", name);
 400         return AVERROR_FILTER_NOT_FOUND;
 401     }
 402
 403     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 404     if (!ctx)
 405         return AVERROR(ENOMEM);
 406
 407     if (duration != INT64_MAX) {
 408         ret = av_opt_set_int(ctx, "durationi", duration,
 409                                 AV_OPT_SEARCH_CHILDREN);
 410     }
 411     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 412         ret = av_opt_set_int(ctx, "starti", start_time,
 413                                 AV_OPT_SEARCH_CHILDREN);
 414     }
 415     if (ret < 0) {
 416         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 417         return ret;
 418     }
 419
 420     ret = avfilter_init_str(ctx, NULL);
 421     if (ret < 0)
 422         return ret;
 423
 424     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 425     if (ret < 0)
 426         return ret;
 427
 428     *last_filter = ctx;
 429     *pad_idx     = 0;
 430     return 0;
 431 }
 432
 433 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 434                          const char *filter_name, const char *args)
 435 {
 436     AVFilterGraph *graph = (*last_filter)->graph;
 437     AVFilterContext *ctx;
 438     int ret;
 439
 440     ret = avfilter_graph_create_filter(&ctx,
 441                                        avfilter_get_by_name(filter_name),
 442                                        filter_name, args, NULL, graph);
 443     if (ret < 0)
 444         return ret;
 445
 446     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 447     if (ret < 0)
 448         return ret;
 449
 450     *last_filter = ctx;
 451     *pad_idx     = 0;
 452     return 0;
 453 }
 454
 455 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 456 {
 457     char *pix_fmts;
 458     OutputStream *ost = ofilter->ost;
 459     OutputFile    *of = output_files[ost->file_index];
 460     AVFilterContext *last_filter = out->filter_ctx;
 461     int pad_idx = out->pad_idx;
 462     int ret;
 463     char name[255];
 464
 465     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 466     ret = avfilter_graph_create_filter(&ofilter->filter,
 467                                        avfilter_get_by_name("buffersink"),
 468                                        name, NULL, NULL, fg->graph);
 469
 470     if (ret < 0)
 471         return ret;
 472
 473     if (ofilter->width || ofilter->height) {
 474         char args[255];
 475         AVFilterContext *filter;
 476         AVDictionaryEntry *e = NULL;
 477
 478         snprintf(args, sizeof(args), "%d:%d",
 479                  ofilter->width, ofilter->height);
 480
 481         while ((e = av_dict_get(ost->sws_dict, "", e,
 482                                 AV_DICT_IGNORE_SUFFIX))) {
 483             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 484         }
 485
 486         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 487                  ost->file_index, ost->index);
 488         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 489                                                 name, args, NULL, fg->graph)) < 0)
 490             return ret;
 491         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 492             return ret;
 493
 494         last_filter = filter;
 495         pad_idx = 0;
 496     }
 497
 498     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 499         AVFilterContext *filter;
 500         snprintf(name, sizeof(name), "format_out_%d_%d",
 501                  ost->file_index, ost->index);
 502         ret = avfilter_graph_create_filter(&filter,
 503                                            avfilter_get_by_name("format"),
 504                                            "format", pix_fmts, NULL, fg->graph);
 505         av_freep(&pix_fmts);
 506         if (ret < 0)
 507             return ret;
 508         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 509             return ret;
 510
 511         last_filter = filter;
 512         pad_idx     = 0;
 513     }
 514
 515     if (ost->frame_rate.num && 0) {
 516         AVFilterContext *fps;
 517         char args[255];
 518
 519         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 520                  ost->frame_rate.den);
 521         snprintf(name, sizeof(name), "fps_out_%d_%d",
 522                  ost->file_index, ost->index);
 523         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 524                                            name, args, NULL, fg->graph);
 525         if (ret < 0)
 526             return ret;
 527
 528         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 529         if (ret < 0)
 530             return ret;
 531         last_filter = fps;
 532         pad_idx = 0;
 533     }
 534
 535     snprintf(name, sizeof(name), "trim_out_%d_%d",
 536              ost->file_index, ost->index);
 537     ret = insert_trim(of->start_time, of->recording_time,
 538                       &last_filter, &pad_idx, name);
 539     if (ret < 0)
 540         return ret;
 541
 542
 543     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 544         return ret;
 545
 546     return 0;
 547 }
 548
 549 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 550 {
 551     OutputStream *ost = ofilter->ost;
 552     OutputFile    *of = output_files[ost->file_index];
 553     AVCodecContext *codec  = ost->enc_ctx;
 554     AVFilterContext *last_filter = out->filter_ctx;
 555     int pad_idx = out->pad_idx;
 556     char *sample_fmts, *sample_rates, *channel_layouts;
 557     char name[255];
 558     int ret;
 559
 560     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 561     ret = avfilter_graph_create_filter(&ofilter->filter,
 562                                        avfilter_get_by_name("abuffersink"),
 563                                        name, NULL, NULL, fg->graph);
 564     if (ret < 0)
 565         return ret;
 566     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 567         return ret;
 568
 569 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 570     AVFilterContext *filt_ctx;                                              \
 571                                                                             \
 572     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 573            "similarly to -af " filter_name "=%s.\n", arg);                  \
 574                                                                             \
 575     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 576                                        avfilter_get_by_name(filter_name),   \
 577                                        filter_name, arg, NULL, fg->graph);  \
 578     if (ret < 0)                                                            \
 579         return ret;                                                         \
 580                                                                             \
 581     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 582     if (ret < 0)                                                            \
 583         return ret;                                                         \
 584                                                                             \
 585     last_filter = filt_ctx;                                                 \
 586     pad_idx = 0;                                                            \
 587 } while (0)
 588     if (ost->audio_channels_mapped) {
 589         int i;
 590         AVBPrint pan_buf;
 591         av_bprint_init(&pan_buf, 256, 8192);
 592         av_bprintf(&pan_buf, "0x%"PRIx64,
 593                    av_get_default_channel_layout(ost->audio_channels_mapped));
 594         for (i = 0; i < ost->audio_channels_mapped; i++)
 595             if (ost->audio_channels_map[i] != -1)
 596                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 597
 598         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 599         av_bprint_finalize(&pan_buf, NULL);
 600     }
 601
 602     if (codec->channels && !codec->channel_layout)
 603         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 604
 605     sample_fmts     = choose_sample_fmts(ofilter);
 606     sample_rates    = choose_sample_rates(ofilter);
 607     channel_layouts = choose_channel_layouts(ofilter);
 608     if (sample_fmts || sample_rates || channel_layouts) {
 609         AVFilterContext *format;
 610         char args[256];
 611         args[0] = 0;
 612
 613         if (sample_fmts)
 614             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 615                             sample_fmts);
 616         if (sample_rates)
 617             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 618                             sample_rates);
 619         if (channel_layouts)
 620             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 621                             channel_layouts);
 622
 623         av_freep(&sample_fmts);
 624         av_freep(&sample_rates);
 625         av_freep(&channel_layouts);
 626
 627         snprintf(name, sizeof(name), "format_out_%d_%d",
 628                  ost->file_index, ost->index);
 629         ret = avfilter_graph_create_filter(&format,
 630                                            avfilter_get_by_name("aformat"),
 631                                            name, args, NULL, fg->graph);
 632         if (ret < 0)
 633             return ret;
 634
 635         ret = avfilter_link(last_filter, pad_idx, format, 0);
 636         if (ret < 0)
 637             return ret;
 638
 639         last_filter = format;
 640         pad_idx = 0;
 641     }
 642
 643     if (audio_volume != 256 && 0) {
 644         char args[256];
 645
 646         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 647         AUTO_INSERT_FILTER("-vol", "volume", args);
 648     }
 649
 650     if (ost->apad && of->shortest) {
 651         char args[256];
 652         int i;
 653
 654         for (i=0; i<of->ctx->nb_streams; i++)
 655             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 656                 break;
 657
 658         if (i<of->ctx->nb_streams) {
 659             snprintf(args, sizeof(args), "%s", ost->apad);
 660             AUTO_INSERT_FILTER("-apad", "apad", args);
 661         }
 662     }
 663
 664     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 665              ost->file_index, ost->index);
 666     ret = insert_trim(of->start_time, of->recording_time,
 667                       &last_filter, &pad_idx, name);
 668     if (ret < 0)
 669         return ret;
 670
 671     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 672         return ret;
 673
 674     return 0;
 675 }
 676
 677 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 678 {
 679     if (!ofilter->ost) {
 680         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 681         exit_program(1);
 682     }
 683
 684     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 685     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 686     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 687     default: av_assert0(0);
 688     }
 689 }
 690
 691 void check_filter_outputs(void)
 692 {
 693     int i;
 694     for (i = 0; i < nb_filtergraphs; i++) {
 695         int n;
 696         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 697             OutputFilter *output = filtergraphs[i]->outputs[n];
 698             if (!output->ost) {
 699                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 700                 exit_program(1);
 701             }
 702         }
 703     }
 704 }
 705
 706 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 707 {
 708     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 709     int i, w, h;
 710
 711     /* Compute the size of the canvas for the subtitles stream.
 712        If the subtitles codecpar has set a size, use it. Otherwise use the
 713        maximum dimensions of the video streams in the same file. */
 714     w = ifilter->width;
 715     h = ifilter->height;
 716     if (!(w && h)) {
 717         for (i = 0; i < avf->nb_streams; i++) {
 718             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 719                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 720                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 721             }
 722         }
 723         if (!(w && h)) {
 724             w = FFMAX(w, 720);
 725             h = FFMAX(h, 576);
 726         }
 727         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 728     }
 729     ist->sub2video.w = ifilter->width  = w;
 730     ist->sub2video.h = ifilter->height = h;
 731
 732     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 733     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 734
 735     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 736        palettes for all rectangles are identical or compatible */
 737     ifilter->format = AV_PIX_FMT_RGB32;
 738
 739     ist->sub2video.frame = av_frame_alloc();
 740     if (!ist->sub2video.frame)
 741         return AVERROR(ENOMEM);
 742     ist->sub2video.last_pts = INT64_MIN;
 743     ist->sub2video.end_pts  = INT64_MIN;
 744
 745     /* sub2video structure has been (re-)initialized.
 746        Mark it as such so that the system will be
 747        initialized with the first received heartbeat. */
 748     ist->sub2video.initialize = 1;
 749
 750     return 0;
 751 }
 752
 753 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 754                                         AVFilterInOut *in)
 755 {
 756     AVFilterContext *last_filter;
 757     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 758     InputStream *ist = ifilter->ist;
 759     InputFile     *f = input_files[ist->file_index];
 760     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 761                                          ist->st->time_base;
 762     AVRational fr = ist->framerate;
 763     AVRational sar;
 764     AVBPrint args;
 765     char name[255];
 766     int ret, pad_idx = 0;
 767     int64_t tsoffset = 0;
 768     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 769
 770     if (!par)
 771         return AVERROR(ENOMEM);
 772     memset(par, 0, sizeof(*par));
 773     par->format = AV_PIX_FMT_NONE;
 774
 775     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 776         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 777         ret = AVERROR(EINVAL);
 778         goto fail;
 779     }
 780
 781     if (!fr.num)
 782         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 783
 784     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 785         ret = sub2video_prepare(ist, ifilter);
 786         if (ret < 0)
 787             goto fail;
 788     }
 789
 790     sar = ifilter->sample_aspect_ratio;
 791     if(!sar.den)
 792         sar = (AVRational){0,1};
 793     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 794     av_bprintf(&args,
 795              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 796              "pixel_aspect=%d/%d",
 797              ifilter->width, ifilter->height, ifilter->format,
 798              tb.num, tb.den, sar.num, sar.den);
 799     if (fr.num && fr.den)
 800         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 801     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 802              ist->file_index, ist->st->index);
 803
 804
 805     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 806                                             args.str, NULL, fg->graph)) < 0)
 807         goto fail;
 808     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 809     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 810     if (ret < 0)
 811         goto fail;
 812     av_freep(&par);
 813     last_filter = ifilter->filter;
 814
 815     if (ist->autorotate) {
 816         double theta = get_rotation(ist->st);
 817
 818         if (fabs(theta - 90) < 1.0) {
 819             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 820         } else if (fabs(theta - 180) < 1.0) {
 821             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 822             if (ret < 0)
 823                 return ret;
 824             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 825         } else if (fabs(theta - 270) < 1.0) {
 826             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 827         } else if (fabs(theta) > 1.0) {
 828             char rotate_buf[64];
 829             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 830             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 831         }
 832         if (ret < 0)
 833             return ret;
 834     }
 835
 836     if (do_deinterlace) {
 837         AVFilterContext *yadif;
 838
 839         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 840                  ist->file_index, ist->st->index);
 841         if ((ret = avfilter_graph_create_filter(&yadif,
 842                                                 avfilter_get_by_name("yadif"),
 843                                                 name, "", NULL,
 844                                                 fg->graph)) < 0)
 845             return ret;
 846
 847         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 848             return ret;
 849
 850         last_filter = yadif;
 851     }
 852
 853     snprintf(name, sizeof(name), "trim_in_%d_%d",
 854              ist->file_index, ist->st->index);
 855     if (copy_ts) {
 856         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 857         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 858             tsoffset += f->ctx->start_time;
 859     }
 860     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 861                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 862                       &last_filter, &pad_idx, name);
 863     if (ret < 0)
 864         return ret;
 865
 866     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 867         return ret;
 868     return 0;
 869 fail:
 870     av_freep(&par);
 871
 872     return ret;
 873 }
 874
 875 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 876                                         AVFilterInOut *in)
 877 {
 878     AVFilterContext *last_filter;
 879     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 880     InputStream *ist = ifilter->ist;
 881     InputFile     *f = input_files[ist->file_index];
 882     AVBPrint args;
 883     char name[255];
 884     int ret, pad_idx = 0;
 885     int64_t tsoffset = 0;
 886
 887     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 888         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 889         return AVERROR(EINVAL);
 890     }
 891
 892     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 893     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 894              1, ifilter->sample_rate,
 895              ifilter->sample_rate,
 896              av_get_sample_fmt_name(ifilter->format));
 897     if (ifilter->channel_layout)
 898         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 899                    ifilter->channel_layout);
 900     else
 901         av_bprintf(&args, ":channels=%d", ifilter->channels);
 902     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 903              ist->file_index, ist->st->index);
 904
 905     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 906                                             name, args.str, NULL,
 907                                             fg->graph)) < 0)
 908         return ret;
 909     last_filter = ifilter->filter;
 910
 911 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 912     AVFilterContext *filt_ctx;                                              \
 913                                                                             \
 914     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 915            "similarly to -af " filter_name "=%s.\n", arg);                  \
 916                                                                             \
 917     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 918                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 919     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 920                                        avfilter_get_by_name(filter_name),   \
 921                                        name, arg, NULL, fg->graph);         \
 922     if (ret < 0)                                                            \
 923         return ret;                                                         \
 924                                                                             \
 925     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 926     if (ret < 0)                                                            \
 927         return ret;                                                         \
 928                                                                             \
 929     last_filter = filt_ctx;                                                 \
 930 } while (0)
 931
 932     if (audio_sync_method > 0) {
 933         char args[256] = {0};
 934
 935         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 936         if (audio_drift_threshold != 0.1)
 937             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 938         if (!fg->reconfiguration)
 939             av_strlcatf(args, sizeof(args), ":first_pts=0");
 940         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 941     }
 942
 943 //     if (ost->audio_channels_mapped) {
 944 //         int i;
 945 //         AVBPrint pan_buf;
 946 //         av_bprint_init(&pan_buf, 256, 8192);
 947 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 948 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 949 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 950 //             if (ost->audio_channels_map[i] != -1)
 951 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 952 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 953 //         av_bprint_finalize(&pan_buf, NULL);
 954 //     }
 955
 956     if (audio_volume != 256) {
 957         char args[256];
 958
 959         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 960                "audio filter instead.\n");
 961
 962         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 963         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 964     }
 965
 966     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 967              ist->file_index, ist->st->index);
 968     if (copy_ts) {
 969         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 970         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 971             tsoffset += f->ctx->start_time;
 972     }
 973     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 974                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 975                       &last_filter, &pad_idx, name);
 976     if (ret < 0)
 977         return ret;
 978
 979     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 980         return ret;
 981
 982     return 0;
 983 }
 984
 985 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 986                                   AVFilterInOut *in)
 987 {
 988     if (!ifilter->ist->dec) {
 989         av_log(NULL, AV_LOG_ERROR,
 990                "No decoder for stream #%d:%d, filtering impossible\n",
 991                ifilter->ist->file_index, ifilter->ist->st->index);
 992         return AVERROR_DECODER_NOT_FOUND;
 993     }
 994     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 995     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 996     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 997     default: av_assert0(0);
 998     }
 999 }
1000
1001 static void cleanup_filtergraph(FilterGraph *fg)
1002 {
1003     int i;
1004     for (i = 0; i < fg->nb_outputs; i++)
1005         fg->outputs[i]->filter = (AVFilterContext *)NULL;
1006     for (i = 0; i < fg->nb_inputs; i++)
1007         fg->inputs[i]->filter = (AVFilterContext *)NULL;
1008     avfilter_graph_free(&fg->graph);
1009 }
1010
1011 int configure_filtergraph(FilterGraph *fg)
1012 {
1013     AVFilterInOut *inputs, *outputs, *cur;
1014     int ret, i, simple = filtergraph_is_simple(fg);
1015     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1016                                       fg->graph_desc;
1017
1018     cleanup_filtergraph(fg);
1019     if (!(fg->graph = avfilter_graph_alloc()))
1020         return AVERROR(ENOMEM);
1021
1022     if (simple) {
1023         OutputStream *ost = fg->outputs[0]->ost;
1024         char args[512];
1025         AVDictionaryEntry *e = NULL;
1026
1027         fg->graph->nb_threads = filter_nbthreads;
1028
1029         args[0] = 0;
1030         while ((e = av_dict_get(ost->sws_dict, "", e,
1031                                 AV_DICT_IGNORE_SUFFIX))) {
1032             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1033         }
1034         if (strlen(args))
1035             args[strlen(args)-1] = 0;
1036         fg->graph->scale_sws_opts = av_strdup(args);
1037
1038         args[0] = 0;
1039         while ((e = av_dict_get(ost->swr_opts, "", e,
1040                                 AV_DICT_IGNORE_SUFFIX))) {
1041             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1042         }
1043         if (strlen(args))
1044             args[strlen(args)-1] = 0;
1045         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1046
1047         args[0] = '\0';
1048         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1049                                 AV_DICT_IGNORE_SUFFIX))) {
1050             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1051         }
1052         if (strlen(args))
1053             args[strlen(args) - 1] = '\0';
1054
1055         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1056         if (e)
1057             av_opt_set(fg->graph, "threads", e->value, 0);
1058     } else {
1059         fg->graph->nb_threads = filter_complex_nbthreads;
1060     }
1061
1062     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1063         goto fail;
1064
1065     ret = hw_device_setup_for_filter(fg);
1066     if (ret < 0)
1067         goto fail;
1068
1069     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1070         const char *num_inputs;
1071         const char *num_outputs;
1072         if (!outputs) {
1073             num_outputs = "0";
1074         } else if (outputs->next) {
1075             num_outputs = ">1";
1076         } else {
1077             num_outputs = "1";
1078         }
1079         if (!inputs) {
1080             num_inputs = "0";
1081         } else if (inputs->next) {
1082             num_inputs = ">1";
1083         } else {
1084             num_inputs = "1";
1085         }
1086         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1087                "to have exactly 1 input and 1 output."
1088                " However, it had %s input(s) and %s output(s)."
1089                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1090                graph_desc, num_inputs, num_outputs);
1091         ret = AVERROR(EINVAL);
1092         goto fail;
1093     }
1094
1095     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1096         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1097             avfilter_inout_free(&inputs);
1098             avfilter_inout_free(&outputs);
1099             goto fail;
1100         }
1101     avfilter_inout_free(&inputs);
1102
1103     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1104         configure_output_filter(fg, fg->outputs[i], cur);
1105     avfilter_inout_free(&outputs);
1106
1107     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1108         goto fail;
1109
1110     /* limit the lists of allowed formats to the ones selected, to
1111      * make sure they stay the same if the filtergraph is reconfigured later */
1112     for (i = 0; i < fg->nb_outputs; i++) {
1113         OutputFilter *ofilter = fg->outputs[i];
1114         AVFilterContext *sink = ofilter->filter;
1115
1116         ofilter->format = av_buffersink_get_format(sink);
1117
1118         ofilter->width  = av_buffersink_get_w(sink);
1119         ofilter->height = av_buffersink_get_h(sink);
1120
1121         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1122         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1123     }
1124
1125     fg->reconfiguration = 1;
1126
1127     for (i = 0; i < fg->nb_outputs; i++) {
1128         OutputStream *ost = fg->outputs[i]->ost;
1129         if (!ost->enc) {
1130             /* identical to the same check in ffmpeg.c, needed because
1131                complex filter graphs are initialized earlier */
1132             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1133                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1134             ret = AVERROR(EINVAL);
1135             goto fail;
1136         }
1137         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1138             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1139             av_buffersink_set_frame_size(ost->filter->filter,
1140                                          ost->enc_ctx->frame_size);
1141     }
1142
1143     for (i = 0; i < fg->nb_inputs; i++) {
1144         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1145             AVFrame *tmp;
1146             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1147             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1148             av_frame_free(&tmp);
1149             if (ret < 0)
1150                 goto fail;
1151         }
1152     }
1153
1154     /* send the EOFs for the finished inputs */
1155     for (i = 0; i < fg->nb_inputs; i++) {
1156         if (fg->inputs[i]->eof) {
1157             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1158             if (ret < 0)
1159                 goto fail;
1160         }
1161     }
1162
1163     /* process queued up subtitle packets */
1164     for (i = 0; i < fg->nb_inputs; i++) {
1165         InputStream *ist = fg->inputs[i]->ist;
1166         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1167             while (av_fifo_size(ist->sub2video.sub_queue)) {
1168                 AVSubtitle tmp;
1169                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1170                 sub2video_update(ist, INT64_MIN, &tmp);
1171                 avsubtitle_free(&tmp);
1172             }
1173         }
1174     }
1175
1176     return 0;
1177
1178 fail:
1179     cleanup_filtergraph(fg);
1180     return ret;
1181 }
1182
1183 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1184 {
1185     av_buffer_unref(&ifilter->hw_frames_ctx);
1186
1187     ifilter->format = frame->format;
1188
1189     ifilter->width               = frame->width;
1190     ifilter->height              = frame->height;
1191     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1192
1193     ifilter->sample_rate         = frame->sample_rate;
1194     ifilter->channels            = frame->channels;
1195     ifilter->channel_layout      = frame->channel_layout;
1196
1197     if (frame->hw_frames_ctx) {
1198         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1199         if (!ifilter->hw_frames_ctx)
1200             return AVERROR(ENOMEM);
1201     }
1202
1203     return 0;
1204 }
1205
1206 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1207 {
1208     int i;
1209     for (i = 0; i < fg->nb_inputs; i++)
1210         if (fg->inputs[i]->ist == ist)
1211             return 1;
1212     return 0;
1213 }
1214
1215 int filtergraph_is_simple(FilterGraph *fg)
1216 {
1217     return !fg->graph_desc;
1218 }