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         if (ist->user_set_discard == AVDISCARD_ALL) {
 297             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 298                    "matches a disabled input stream.\n", p, fg->graph_desc);
 299             exit_program(1);
 300         }
 301     } else {
 302         /* find the first unused stream of corresponding type */
 303         for (i = 0; i < nb_input_streams; i++) {
 304             ist = input_streams[i];
 305             if (ist->user_set_discard == AVDISCARD_ALL)
 306                 continue;
 307             if (ist->dec_ctx->codec_type == type && ist->discard)
 308                 break;
 309         }
 310         if (i == nb_input_streams) {
 311             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 312                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 313                    in->filter_ctx->name);
 314             exit_program(1);
 315         }
 316     }
 317     av_assert0(ist);
 318
 319     ist->discard         = 0;
 320     ist->decoding_needed |= DECODING_FOR_FILTER;
 321     ist->st->discard = AVDISCARD_NONE;
 322
 323     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 324     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 325         exit_program(1);
 326     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 327     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 328     fg->inputs[fg->nb_inputs - 1]->format = -1;
 329     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 330     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 331
 332     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 333     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 334         exit_program(1);
 335
 336     GROW_ARRAY(ist->filters, ist->nb_filters);
 337     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 338 }
 339
 340 int init_complex_filtergraph(FilterGraph *fg)
 341 {
 342     AVFilterInOut *inputs, *outputs, *cur;
 343     AVFilterGraph *graph;
 344     int ret = 0;
 345
 346     /* this graph is only used for determining the kinds of inputs
 347      * and outputs we have, and is discarded on exit from this function */
 348     graph = avfilter_graph_alloc();
 349     if (!graph)
 350         return AVERROR(ENOMEM);
 351     graph->nb_threads = 1;
 352
 353     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 354     if (ret < 0)
 355         goto fail;
 356
 357     for (cur = inputs; cur; cur = cur->next)
 358         init_input_filter(fg, cur);
 359
 360     for (cur = outputs; cur;) {
 361         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 362         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 363         if (!fg->outputs[fg->nb_outputs - 1])
 364             exit_program(1);
 365
 366         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 367         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 368         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 369                                                                          cur->pad_idx);
 370         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 371         cur = cur->next;
 372         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 373     }
 374
 375 fail:
 376     avfilter_inout_free(&inputs);
 377     avfilter_graph_free(&graph);
 378     return ret;
 379 }
 380
 381 static int insert_trim(int64_t start_time, int64_t duration,
 382                        AVFilterContext **last_filter, int *pad_idx,
 383                        const char *filter_name)
 384 {
 385     AVFilterGraph *graph = (*last_filter)->graph;
 386     AVFilterContext *ctx;
 387     const AVFilter *trim;
 388     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 389     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 390     int ret = 0;
 391
 392     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 393         return 0;
 394
 395     trim = avfilter_get_by_name(name);
 396     if (!trim) {
 397         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 398                "recording time.\n", name);
 399         return AVERROR_FILTER_NOT_FOUND;
 400     }
 401
 402     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 403     if (!ctx)
 404         return AVERROR(ENOMEM);
 405
 406     if (duration != INT64_MAX) {
 407         ret = av_opt_set_int(ctx, "durationi", duration,
 408                                 AV_OPT_SEARCH_CHILDREN);
 409     }
 410     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 411         ret = av_opt_set_int(ctx, "starti", start_time,
 412                                 AV_OPT_SEARCH_CHILDREN);
 413     }
 414     if (ret < 0) {
 415         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 416         return ret;
 417     }
 418
 419     ret = avfilter_init_str(ctx, NULL);
 420     if (ret < 0)
 421         return ret;
 422
 423     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 424     if (ret < 0)
 425         return ret;
 426
 427     *last_filter = ctx;
 428     *pad_idx     = 0;
 429     return 0;
 430 }
 431
 432 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 433                          const char *filter_name, const char *args)
 434 {
 435     AVFilterGraph *graph = (*last_filter)->graph;
 436     AVFilterContext *ctx;
 437     int ret;
 438
 439     ret = avfilter_graph_create_filter(&ctx,
 440                                        avfilter_get_by_name(filter_name),
 441                                        filter_name, args, NULL, graph);
 442     if (ret < 0)
 443         return ret;
 444
 445     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 446     if (ret < 0)
 447         return ret;
 448
 449     *last_filter = ctx;
 450     *pad_idx     = 0;
 451     return 0;
 452 }
 453
 454 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 455 {
 456     char *pix_fmts;
 457     OutputStream *ost = ofilter->ost;
 458     OutputFile    *of = output_files[ost->file_index];
 459     AVFilterContext *last_filter = out->filter_ctx;
 460     int pad_idx = out->pad_idx;
 461     int ret;
 462     char name[255];
 463
 464     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 465     ret = avfilter_graph_create_filter(&ofilter->filter,
 466                                        avfilter_get_by_name("buffersink"),
 467                                        name, NULL, NULL, fg->graph);
 468
 469     if (ret < 0)
 470         return ret;
 471
 472     if (ofilter->width || ofilter->height) {
 473         char args[255];
 474         AVFilterContext *filter;
 475         AVDictionaryEntry *e = NULL;
 476
 477         snprintf(args, sizeof(args), "%d:%d",
 478                  ofilter->width, ofilter->height);
 479
 480         while ((e = av_dict_get(ost->sws_dict, "", e,
 481                                 AV_DICT_IGNORE_SUFFIX))) {
 482             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 483         }
 484
 485         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 486                  ost->file_index, ost->index);
 487         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 488                                                 name, args, NULL, fg->graph)) < 0)
 489             return ret;
 490         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 491             return ret;
 492
 493         last_filter = filter;
 494         pad_idx = 0;
 495     }
 496
 497     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 498         AVFilterContext *filter;
 499         snprintf(name, sizeof(name), "format_out_%d_%d",
 500                  ost->file_index, ost->index);
 501         ret = avfilter_graph_create_filter(&filter,
 502                                            avfilter_get_by_name("format"),
 503                                            "format", pix_fmts, NULL, fg->graph);
 504         av_freep(&pix_fmts);
 505         if (ret < 0)
 506             return ret;
 507         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 508             return ret;
 509
 510         last_filter = filter;
 511         pad_idx     = 0;
 512     }
 513
 514     if (ost->frame_rate.num && 0) {
 515         AVFilterContext *fps;
 516         char args[255];
 517
 518         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 519                  ost->frame_rate.den);
 520         snprintf(name, sizeof(name), "fps_out_%d_%d",
 521                  ost->file_index, ost->index);
 522         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 523                                            name, args, NULL, fg->graph);
 524         if (ret < 0)
 525             return ret;
 526
 527         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 528         if (ret < 0)
 529             return ret;
 530         last_filter = fps;
 531         pad_idx = 0;
 532     }
 533
 534     snprintf(name, sizeof(name), "trim_out_%d_%d",
 535              ost->file_index, ost->index);
 536     ret = insert_trim(of->start_time, of->recording_time,
 537                       &last_filter, &pad_idx, name);
 538     if (ret < 0)
 539         return ret;
 540
 541
 542     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 543         return ret;
 544
 545     return 0;
 546 }
 547
 548 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 549 {
 550     OutputStream *ost = ofilter->ost;
 551     OutputFile    *of = output_files[ost->file_index];
 552     AVCodecContext *codec  = ost->enc_ctx;
 553     AVFilterContext *last_filter = out->filter_ctx;
 554     int pad_idx = out->pad_idx;
 555     char *sample_fmts, *sample_rates, *channel_layouts;
 556     char name[255];
 557     int ret;
 558
 559     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 560     ret = avfilter_graph_create_filter(&ofilter->filter,
 561                                        avfilter_get_by_name("abuffersink"),
 562                                        name, NULL, NULL, fg->graph);
 563     if (ret < 0)
 564         return ret;
 565     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 566         return ret;
 567
 568 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 569     AVFilterContext *filt_ctx;                                              \
 570                                                                             \
 571     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 572            "similarly to -af " filter_name "=%s.\n", arg);                  \
 573                                                                             \
 574     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 575                                        avfilter_get_by_name(filter_name),   \
 576                                        filter_name, arg, NULL, fg->graph);  \
 577     if (ret < 0)                                                            \
 578         return ret;                                                         \
 579                                                                             \
 580     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 581     if (ret < 0)                                                            \
 582         return ret;                                                         \
 583                                                                             \
 584     last_filter = filt_ctx;                                                 \
 585     pad_idx = 0;                                                            \
 586 } while (0)
 587     if (ost->audio_channels_mapped) {
 588         int i;
 589         AVBPrint pan_buf;
 590         av_bprint_init(&pan_buf, 256, 8192);
 591         av_bprintf(&pan_buf, "0x%"PRIx64,
 592                    av_get_default_channel_layout(ost->audio_channels_mapped));
 593         for (i = 0; i < ost->audio_channels_mapped; i++)
 594             if (ost->audio_channels_map[i] != -1)
 595                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 596
 597         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 598         av_bprint_finalize(&pan_buf, NULL);
 599     }
 600
 601     if (codec->channels && !codec->channel_layout)
 602         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 603
 604     sample_fmts     = choose_sample_fmts(ofilter);
 605     sample_rates    = choose_sample_rates(ofilter);
 606     channel_layouts = choose_channel_layouts(ofilter);
 607     if (sample_fmts || sample_rates || channel_layouts) {
 608         AVFilterContext *format;
 609         char args[256];
 610         args[0] = 0;
 611
 612         if (sample_fmts)
 613             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 614                             sample_fmts);
 615         if (sample_rates)
 616             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 617                             sample_rates);
 618         if (channel_layouts)
 619             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 620                             channel_layouts);
 621
 622         av_freep(&sample_fmts);
 623         av_freep(&sample_rates);
 624         av_freep(&channel_layouts);
 625
 626         snprintf(name, sizeof(name), "format_out_%d_%d",
 627                  ost->file_index, ost->index);
 628         ret = avfilter_graph_create_filter(&format,
 629                                            avfilter_get_by_name("aformat"),
 630                                            name, args, NULL, fg->graph);
 631         if (ret < 0)
 632             return ret;
 633
 634         ret = avfilter_link(last_filter, pad_idx, format, 0);
 635         if (ret < 0)
 636             return ret;
 637
 638         last_filter = format;
 639         pad_idx = 0;
 640     }
 641
 642     if (audio_volume != 256 && 0) {
 643         char args[256];
 644
 645         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 646         AUTO_INSERT_FILTER("-vol", "volume", args);
 647     }
 648
 649     if (ost->apad && of->shortest) {
 650         char args[256];
 651         int i;
 652
 653         for (i=0; i<of->ctx->nb_streams; i++)
 654             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 655                 break;
 656
 657         if (i<of->ctx->nb_streams) {
 658             snprintf(args, sizeof(args), "%s", ost->apad);
 659             AUTO_INSERT_FILTER("-apad", "apad", args);
 660         }
 661     }
 662
 663     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 664              ost->file_index, ost->index);
 665     ret = insert_trim(of->start_time, of->recording_time,
 666                       &last_filter, &pad_idx, name);
 667     if (ret < 0)
 668         return ret;
 669
 670     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 671         return ret;
 672
 673     return 0;
 674 }
 675
 676 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 677 {
 678     if (!ofilter->ost) {
 679         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 680         exit_program(1);
 681     }
 682
 683     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 684     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 685     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 686     default: av_assert0(0);
 687     }
 688 }
 689
 690 void check_filter_outputs(void)
 691 {
 692     int i;
 693     for (i = 0; i < nb_filtergraphs; i++) {
 694         int n;
 695         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 696             OutputFilter *output = filtergraphs[i]->outputs[n];
 697             if (!output->ost) {
 698                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 699                 exit_program(1);
 700             }
 701         }
 702     }
 703 }
 704
 705 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 706 {
 707     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 708     int i, w, h;
 709
 710     /* Compute the size of the canvas for the subtitles stream.
 711        If the subtitles codecpar has set a size, use it. Otherwise use the
 712        maximum dimensions of the video streams in the same file. */
 713     w = ifilter->width;
 714     h = ifilter->height;
 715     if (!(w && h)) {
 716         for (i = 0; i < avf->nb_streams; i++) {
 717             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 718                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 719                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 720             }
 721         }
 722         if (!(w && h)) {
 723             w = FFMAX(w, 720);
 724             h = FFMAX(h, 576);
 725         }
 726         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 727     }
 728     ist->sub2video.w = ifilter->width  = w;
 729     ist->sub2video.h = ifilter->height = h;
 730
 731     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 732     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 733
 734     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 735        palettes for all rectangles are identical or compatible */
 736     ifilter->format = AV_PIX_FMT_RGB32;
 737
 738     ist->sub2video.frame = av_frame_alloc();
 739     if (!ist->sub2video.frame)
 740         return AVERROR(ENOMEM);
 741     ist->sub2video.last_pts = INT64_MIN;
 742     ist->sub2video.end_pts  = INT64_MIN;
 743     return 0;
 744 }
 745
 746 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 747                                         AVFilterInOut *in)
 748 {
 749     AVFilterContext *last_filter;
 750     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 751     InputStream *ist = ifilter->ist;
 752     InputFile     *f = input_files[ist->file_index];
 753     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 754                                          ist->st->time_base;
 755     AVRational fr = ist->framerate;
 756     AVRational sar;
 757     AVBPrint args;
 758     char name[255];
 759     int ret, pad_idx = 0;
 760     int64_t tsoffset = 0;
 761     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 762
 763     if (!par)
 764         return AVERROR(ENOMEM);
 765     memset(par, 0, sizeof(*par));
 766     par->format = AV_PIX_FMT_NONE;
 767
 768     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 769         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 770         ret = AVERROR(EINVAL);
 771         goto fail;
 772     }
 773
 774     if (!fr.num)
 775         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 776
 777     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 778         ret = sub2video_prepare(ist, ifilter);
 779         if (ret < 0)
 780             goto fail;
 781     }
 782
 783     sar = ifilter->sample_aspect_ratio;
 784     if(!sar.den)
 785         sar = (AVRational){0,1};
 786     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 787     av_bprintf(&args,
 788              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 789              "pixel_aspect=%d/%d:sws_param=flags=%d",
 790              ifilter->width, ifilter->height, ifilter->format,
 791              tb.num, tb.den, sar.num, sar.den,
 792              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
 793     if (fr.num && fr.den)
 794         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 795     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 796              ist->file_index, ist->st->index);
 797
 798
 799     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 800                                             args.str, NULL, fg->graph)) < 0)
 801         goto fail;
 802     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 803     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 804     if (ret < 0)
 805         goto fail;
 806     av_freep(&par);
 807     last_filter = ifilter->filter;
 808
 809     if (ist->autorotate) {
 810         double theta = get_rotation(ist->st);
 811
 812         if (fabs(theta - 90) < 1.0) {
 813             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 814         } else if (fabs(theta - 180) < 1.0) {
 815             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 816             if (ret < 0)
 817                 return ret;
 818             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 819         } else if (fabs(theta - 270) < 1.0) {
 820             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 821         } else if (fabs(theta) > 1.0) {
 822             char rotate_buf[64];
 823             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 824             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 825         }
 826         if (ret < 0)
 827             return ret;
 828     }
 829
 830     if (do_deinterlace) {
 831         AVFilterContext *yadif;
 832
 833         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 834                  ist->file_index, ist->st->index);
 835         if ((ret = avfilter_graph_create_filter(&yadif,
 836                                                 avfilter_get_by_name("yadif"),
 837                                                 name, "", NULL,
 838                                                 fg->graph)) < 0)
 839             return ret;
 840
 841         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 842             return ret;
 843
 844         last_filter = yadif;
 845     }
 846
 847     snprintf(name, sizeof(name), "trim_in_%d_%d",
 848              ist->file_index, ist->st->index);
 849     if (copy_ts) {
 850         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 851         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 852             tsoffset += f->ctx->start_time;
 853     }
 854     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 855                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 856                       &last_filter, &pad_idx, name);
 857     if (ret < 0)
 858         return ret;
 859
 860     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 861         return ret;
 862     return 0;
 863 fail:
 864     av_freep(&par);
 865
 866     return ret;
 867 }
 868
 869 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 870                                         AVFilterInOut *in)
 871 {
 872     AVFilterContext *last_filter;
 873     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 874     InputStream *ist = ifilter->ist;
 875     InputFile     *f = input_files[ist->file_index];
 876     AVBPrint args;
 877     char name[255];
 878     int ret, pad_idx = 0;
 879     int64_t tsoffset = 0;
 880
 881     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 882         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 883         return AVERROR(EINVAL);
 884     }
 885
 886     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 887     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 888              1, ifilter->sample_rate,
 889              ifilter->sample_rate,
 890              av_get_sample_fmt_name(ifilter->format));
 891     if (ifilter->channel_layout)
 892         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 893                    ifilter->channel_layout);
 894     else
 895         av_bprintf(&args, ":channels=%d", ifilter->channels);
 896     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 897              ist->file_index, ist->st->index);
 898
 899     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 900                                             name, args.str, NULL,
 901                                             fg->graph)) < 0)
 902         return ret;
 903     last_filter = ifilter->filter;
 904
 905 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 906     AVFilterContext *filt_ctx;                                              \
 907                                                                             \
 908     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 909            "similarly to -af " filter_name "=%s.\n", arg);                  \
 910                                                                             \
 911     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 912                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 913     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 914                                        avfilter_get_by_name(filter_name),   \
 915                                        name, arg, NULL, fg->graph);         \
 916     if (ret < 0)                                                            \
 917         return ret;                                                         \
 918                                                                             \
 919     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 920     if (ret < 0)                                                            \
 921         return ret;                                                         \
 922                                                                             \
 923     last_filter = filt_ctx;                                                 \
 924 } while (0)
 925
 926     if (audio_sync_method > 0) {
 927         char args[256] = {0};
 928
 929         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 930         if (audio_drift_threshold != 0.1)
 931             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 932         if (!fg->reconfiguration)
 933             av_strlcatf(args, sizeof(args), ":first_pts=0");
 934         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 935     }
 936
 937 //     if (ost->audio_channels_mapped) {
 938 //         int i;
 939 //         AVBPrint pan_buf;
 940 //         av_bprint_init(&pan_buf, 256, 8192);
 941 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 942 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 943 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 944 //             if (ost->audio_channels_map[i] != -1)
 945 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 946 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 947 //         av_bprint_finalize(&pan_buf, NULL);
 948 //     }
 949
 950     if (audio_volume != 256) {
 951         char args[256];
 952
 953         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 954                "audio filter instead.\n");
 955
 956         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 957         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 958     }
 959
 960     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 961              ist->file_index, ist->st->index);
 962     if (copy_ts) {
 963         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 964         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 965             tsoffset += f->ctx->start_time;
 966     }
 967     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 968                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 969                       &last_filter, &pad_idx, name);
 970     if (ret < 0)
 971         return ret;
 972
 973     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 974         return ret;
 975
 976     return 0;
 977 }
 978
 979 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 980                                   AVFilterInOut *in)
 981 {
 982     if (!ifilter->ist->dec) {
 983         av_log(NULL, AV_LOG_ERROR,
 984                "No decoder for stream #%d:%d, filtering impossible\n",
 985                ifilter->ist->file_index, ifilter->ist->st->index);
 986         return AVERROR_DECODER_NOT_FOUND;
 987     }
 988     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 989     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 990     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 991     default: av_assert0(0);
 992     }
 993 }
 994
 995 static void cleanup_filtergraph(FilterGraph *fg)
 996 {
 997     int i;
 998     for (i = 0; i < fg->nb_outputs; i++)
 999         fg->outputs[i]->filter = (AVFilterContext *)NULL;
1000     for (i = 0; i < fg->nb_inputs; i++)
1001         fg->inputs[i]->filter = (AVFilterContext *)NULL;
1002     avfilter_graph_free(&fg->graph);
1003 }
1004
1005 int configure_filtergraph(FilterGraph *fg)
1006 {
1007     AVFilterInOut *inputs, *outputs, *cur;
1008     int ret, i, simple = filtergraph_is_simple(fg);
1009     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1010                                       fg->graph_desc;
1011
1012     cleanup_filtergraph(fg);
1013     if (!(fg->graph = avfilter_graph_alloc()))
1014         return AVERROR(ENOMEM);
1015
1016     if (simple) {
1017         OutputStream *ost = fg->outputs[0]->ost;
1018         char args[512];
1019         AVDictionaryEntry *e = NULL;
1020
1021         fg->graph->nb_threads = filter_nbthreads;
1022
1023         args[0] = 0;
1024         while ((e = av_dict_get(ost->sws_dict, "", e,
1025                                 AV_DICT_IGNORE_SUFFIX))) {
1026             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1027         }
1028         if (strlen(args))
1029             args[strlen(args)-1] = 0;
1030         fg->graph->scale_sws_opts = av_strdup(args);
1031
1032         args[0] = 0;
1033         while ((e = av_dict_get(ost->swr_opts, "", e,
1034                                 AV_DICT_IGNORE_SUFFIX))) {
1035             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1036         }
1037         if (strlen(args))
1038             args[strlen(args)-1] = 0;
1039         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1040
1041         args[0] = '\0';
1042         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1043                                 AV_DICT_IGNORE_SUFFIX))) {
1044             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1045         }
1046         if (strlen(args))
1047             args[strlen(args) - 1] = '\0';
1048
1049         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1050         if (e)
1051             av_opt_set(fg->graph, "threads", e->value, 0);
1052     } else {
1053         fg->graph->nb_threads = filter_complex_nbthreads;
1054     }
1055
1056     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1057         goto fail;
1058
1059     if (filter_hw_device || hw_device_ctx) {
1060         AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1061                                                : hw_device_ctx;
1062         for (i = 0; i < fg->graph->nb_filters; i++) {
1063             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1064             if (!fg->graph->filters[i]->hw_device_ctx) {
1065                 ret = AVERROR(ENOMEM);
1066                 goto fail;
1067             }
1068         }
1069     }
1070
1071     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1072         const char *num_inputs;
1073         const char *num_outputs;
1074         if (!outputs) {
1075             num_outputs = "0";
1076         } else if (outputs->next) {
1077             num_outputs = ">1";
1078         } else {
1079             num_outputs = "1";
1080         }
1081         if (!inputs) {
1082             num_inputs = "0";
1083         } else if (inputs->next) {
1084             num_inputs = ">1";
1085         } else {
1086             num_inputs = "1";
1087         }
1088         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1089                "to have exactly 1 input and 1 output."
1090                " However, it had %s input(s) and %s output(s)."
1091                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1092                graph_desc, num_inputs, num_outputs);
1093         ret = AVERROR(EINVAL);
1094         goto fail;
1095     }
1096
1097     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1098         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1099             avfilter_inout_free(&inputs);
1100             avfilter_inout_free(&outputs);
1101             goto fail;
1102         }
1103     avfilter_inout_free(&inputs);
1104
1105     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1106         configure_output_filter(fg, fg->outputs[i], cur);
1107     avfilter_inout_free(&outputs);
1108
1109     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1110         goto fail;
1111
1112     /* limit the lists of allowed formats to the ones selected, to
1113      * make sure they stay the same if the filtergraph is reconfigured later */
1114     for (i = 0; i < fg->nb_outputs; i++) {
1115         OutputFilter *ofilter = fg->outputs[i];
1116         AVFilterContext *sink = ofilter->filter;
1117
1118         ofilter->format = av_buffersink_get_format(sink);
1119
1120         ofilter->width  = av_buffersink_get_w(sink);
1121         ofilter->height = av_buffersink_get_h(sink);
1122
1123         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1124         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1125     }
1126
1127     fg->reconfiguration = 1;
1128
1129     for (i = 0; i < fg->nb_outputs; i++) {
1130         OutputStream *ost = fg->outputs[i]->ost;
1131         if (!ost->enc) {
1132             /* identical to the same check in ffmpeg.c, needed because
1133                complex filter graphs are initialized earlier */
1134             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1135                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1136             ret = AVERROR(EINVAL);
1137             goto fail;
1138         }
1139         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1140             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1141             av_buffersink_set_frame_size(ost->filter->filter,
1142                                          ost->enc_ctx->frame_size);
1143     }
1144
1145     for (i = 0; i < fg->nb_inputs; i++) {
1146         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1147             AVFrame *tmp;
1148             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1149             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1150             av_frame_free(&tmp);
1151             if (ret < 0)
1152                 goto fail;
1153         }
1154     }
1155
1156     /* send the EOFs for the finished inputs */
1157     for (i = 0; i < fg->nb_inputs; i++) {
1158         if (fg->inputs[i]->eof) {
1159             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1160             if (ret < 0)
1161                 goto fail;
1162         }
1163     }
1164
1165     /* process queued up subtitle packets */
1166     for (i = 0; i < fg->nb_inputs; i++) {
1167         InputStream *ist = fg->inputs[i]->ist;
1168         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1169             while (av_fifo_size(ist->sub2video.sub_queue)) {
1170                 AVSubtitle tmp;
1171                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1172                 sub2video_update(ist, &tmp);
1173                 avsubtitle_free(&tmp);
1174             }
1175         }
1176     }
1177
1178     return 0;
1179
1180 fail:
1181     cleanup_filtergraph(fg);
1182     return ret;
1183 }
1184
1185 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1186 {
1187     av_buffer_unref(&ifilter->hw_frames_ctx);
1188
1189     ifilter->format = frame->format;
1190
1191     ifilter->width               = frame->width;
1192     ifilter->height              = frame->height;
1193     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1194
1195     ifilter->sample_rate         = frame->sample_rate;
1196     ifilter->channels            = frame->channels;
1197     ifilter->channel_layout      = frame->channel_layout;
1198
1199     if (frame->hw_frames_ctx) {
1200         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1201         if (!ifilter->hw_frames_ctx)
1202             return AVERROR(ENOMEM);
1203     }
1204
1205     return 0;
1206 }
1207
1208 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1209 {
1210     int i;
1211     for (i = 0; i < fg->nb_inputs; i++)
1212         if (fg->inputs[i]->ist == ist)
1213             return 1;
1214     return 0;
1215 }
1216
1217 int filtergraph_is_simple(FilterGraph *fg)
1218 {
1219     return !fg->graph_desc;
1220 }