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 // FIXME: YUV420P etc. are actually supported with full color range,
  43 // yet the latter information isn't available here.
  44 static const enum AVPixelFormat *get_compliance_normal_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
  45 {
  46     static const enum AVPixelFormat mjpeg_formats[] =
  47         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
  48           AV_PIX_FMT_NONE };
  49
  50     if (codec_id == AV_CODEC_ID_MJPEG) {
  51         return mjpeg_formats;
  52     } else {
  53         return default_formats;
  54     }
  55 }
  56
  57 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
  58                                     const AVCodec *codec, enum AVPixelFormat target)
  59 {
  60     if (codec && codec->pix_fmts) {
  61         const enum AVPixelFormat *p = codec->pix_fmts;
  62         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
  63         //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
  64         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
  65         enum AVPixelFormat best= AV_PIX_FMT_NONE;
  66
  67         if (enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
  68             p = get_compliance_normal_pix_fmts(enc_ctx->codec_id, p);
  69         }
  70         for (; *p != AV_PIX_FMT_NONE; p++) {
  71             best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
  72             if (*p == target)
  73                 break;
  74         }
  75         if (*p == AV_PIX_FMT_NONE) {
  76             if (target != AV_PIX_FMT_NONE)
  77                 av_log(NULL, AV_LOG_WARNING,
  78                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
  79                        av_get_pix_fmt_name(target),
  80                        codec->name,
  81                        av_get_pix_fmt_name(best));
  82             return best;
  83         }
  84     }
  85     return target;
  86 }
  87
  88 static char *choose_pix_fmts(OutputFilter *ofilter)
  89 {
  90     OutputStream *ost = ofilter->ost;
  91     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
  92     if (strict_dict)
  93         // used by choose_pixel_fmt() and below
  94         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
  95
  96      if (ost->keep_pix_fmt) {
  97         avfilter_graph_set_auto_convert(ofilter->graph->graph,
  98                                             AVFILTER_AUTO_CONVERT_NONE);
  99         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 100             return NULL;
 101         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 102     }
 103     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 104         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 105     } else if (ost->enc && ost->enc->pix_fmts) {
 106         const enum AVPixelFormat *p;
 107         AVIOContext *s = NULL;
 108         uint8_t *ret;
 109         int len;
 110
 111         if (avio_open_dyn_buf(&s) < 0)
 112             exit_program(1);
 113
 114         p = ost->enc->pix_fmts;
 115         if (ost->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 116             p = get_compliance_normal_pix_fmts(ost->enc_ctx->codec_id, p);
 117         }
 118
 119         for (; *p != AV_PIX_FMT_NONE; p++) {
 120             const char *name = av_get_pix_fmt_name(*p);
 121             avio_printf(s, "%s|", name);
 122         }
 123         len = avio_close_dyn_buf(s, &ret);
 124         ret[len - 1] = 0;
 125         return ret;
 126     } else
 127         return NULL;
 128 }
 129
 130 /* Define a function for building a string containing a list of
 131  * allowed formats. */
 132 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 133 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 134 {                                                                              \
 135     if (ofilter->var != none) {                                                \
 136         get_name(ofilter->var);                                                \
 137         return av_strdup(name);                                                \
 138     } else if (ofilter->supported_list) {                                      \
 139         const type *p;                                                         \
 140         AVIOContext *s = NULL;                                                 \
 141         uint8_t *ret;                                                          \
 142         int len;                                                               \
 143                                                                                \
 144         if (avio_open_dyn_buf(&s) < 0)                                         \
 145             exit_program(1);                                                           \
 146                                                                                \
 147         for (p = ofilter->supported_list; *p != none; p++) {                   \
 148             get_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 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 159 //                  GET_PIX_FMT_NAME)
 160
 161 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 162                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 163
 164 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 165                   GET_SAMPLE_RATE_NAME)
 166
 167 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 168                   GET_CH_LAYOUT_NAME)
 169
 170 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 171 {
 172     FilterGraph *fg = av_mallocz(sizeof(*fg));
 173
 174     if (!fg)
 175         exit_program(1);
 176     fg->index = nb_filtergraphs;
 177
 178     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 179     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 180         exit_program(1);
 181     fg->outputs[0]->ost   = ost;
 182     fg->outputs[0]->graph = fg;
 183     fg->outputs[0]->format = -1;
 184
 185     ost->filter = fg->outputs[0];
 186
 187     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 188     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 189         exit_program(1);
 190     fg->inputs[0]->ist   = ist;
 191     fg->inputs[0]->graph = fg;
 192     fg->inputs[0]->format = -1;
 193
 194     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 195     if (!fg->inputs[0]->frame_queue)
 196         exit_program(1);
 197
 198     GROW_ARRAY(ist->filters, ist->nb_filters);
 199     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 200
 201     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 202     filtergraphs[nb_filtergraphs - 1] = fg;
 203
 204     return 0;
 205 }
 206
 207 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 208 {
 209     AVFilterContext *ctx = inout->filter_ctx;
 210     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 211     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 212     AVIOContext *pb;
 213     uint8_t *res = NULL;
 214
 215     if (avio_open_dyn_buf(&pb) < 0)
 216         exit_program(1);
 217
 218     avio_printf(pb, "%s", ctx->filter->name);
 219     if (nb_pads > 1)
 220         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 221     avio_w8(pb, 0);
 222     avio_close_dyn_buf(pb, &res);
 223     return res;
 224 }
 225
 226 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 227 {
 228     InputStream *ist = NULL;
 229     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 230     int i;
 231
 232     // TODO: support other filter types
 233     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 234         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 235                "currently.\n");
 236         exit_program(1);
 237     }
 238
 239     if (in->name) {
 240         AVFormatContext *s;
 241         AVStream       *st = NULL;
 242         char *p;
 243         int file_idx = strtol(in->name, &p, 0);
 244
 245         if (file_idx < 0 || file_idx >= nb_input_files) {
 246             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 247                    file_idx, fg->graph_desc);
 248             exit_program(1);
 249         }
 250         s = input_files[file_idx]->ctx;
 251
 252         for (i = 0; i < s->nb_streams; i++) {
 253             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 254             if (stream_type != type &&
 255                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 256                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 257                 continue;
 258             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 259                 st = s->streams[i];
 260                 break;
 261             }
 262         }
 263         if (!st) {
 264             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 265                    "matches no streams.\n", p, fg->graph_desc);
 266             exit_program(1);
 267         }
 268         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 269         if (ist->user_set_discard == AVDISCARD_ALL) {
 270             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 271                    "matches a disabled input stream.\n", p, fg->graph_desc);
 272             exit_program(1);
 273         }
 274     } else {
 275         /* find the first unused stream of corresponding type */
 276         for (i = 0; i < nb_input_streams; i++) {
 277             ist = input_streams[i];
 278             if (ist->user_set_discard == AVDISCARD_ALL)
 279                 continue;
 280             if (ist->dec_ctx->codec_type == type && ist->discard)
 281                 break;
 282         }
 283         if (i == nb_input_streams) {
 284             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 285                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 286                    in->filter_ctx->name);
 287             exit_program(1);
 288         }
 289     }
 290     av_assert0(ist);
 291
 292     ist->discard         = 0;
 293     ist->decoding_needed |= DECODING_FOR_FILTER;
 294     ist->st->discard = AVDISCARD_NONE;
 295
 296     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 297     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 298         exit_program(1);
 299     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 300     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 301     fg->inputs[fg->nb_inputs - 1]->format = -1;
 302     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 303     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 304
 305     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 306     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 307         exit_program(1);
 308
 309     GROW_ARRAY(ist->filters, ist->nb_filters);
 310     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 311 }
 312
 313 int init_complex_filtergraph(FilterGraph *fg)
 314 {
 315     AVFilterInOut *inputs, *outputs, *cur;
 316     AVFilterGraph *graph;
 317     int ret = 0;
 318
 319     /* this graph is only used for determining the kinds of inputs
 320      * and outputs we have, and is discarded on exit from this function */
 321     graph = avfilter_graph_alloc();
 322     if (!graph)
 323         return AVERROR(ENOMEM);
 324     graph->nb_threads = 1;
 325
 326     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 327     if (ret < 0)
 328         goto fail;
 329
 330     for (cur = inputs; cur; cur = cur->next)
 331         init_input_filter(fg, cur);
 332
 333     for (cur = outputs; cur;) {
 334         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 335         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 336         if (!fg->outputs[fg->nb_outputs - 1])
 337             exit_program(1);
 338
 339         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 340         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 341         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 342                                                                          cur->pad_idx);
 343         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 344         cur = cur->next;
 345         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 346     }
 347
 348 fail:
 349     avfilter_inout_free(&inputs);
 350     avfilter_graph_free(&graph);
 351     return ret;
 352 }
 353
 354 static int insert_trim(int64_t start_time, int64_t duration,
 355                        AVFilterContext **last_filter, int *pad_idx,
 356                        const char *filter_name)
 357 {
 358     AVFilterGraph *graph = (*last_filter)->graph;
 359     AVFilterContext *ctx;
 360     const AVFilter *trim;
 361     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 362     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 363     int ret = 0;
 364
 365     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 366         return 0;
 367
 368     trim = avfilter_get_by_name(name);
 369     if (!trim) {
 370         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 371                "recording time.\n", name);
 372         return AVERROR_FILTER_NOT_FOUND;
 373     }
 374
 375     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 376     if (!ctx)
 377         return AVERROR(ENOMEM);
 378
 379     if (duration != INT64_MAX) {
 380         ret = av_opt_set_int(ctx, "durationi", duration,
 381                                 AV_OPT_SEARCH_CHILDREN);
 382     }
 383     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 384         ret = av_opt_set_int(ctx, "starti", start_time,
 385                                 AV_OPT_SEARCH_CHILDREN);
 386     }
 387     if (ret < 0) {
 388         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 389         return ret;
 390     }
 391
 392     ret = avfilter_init_str(ctx, NULL);
 393     if (ret < 0)
 394         return ret;
 395
 396     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 397     if (ret < 0)
 398         return ret;
 399
 400     *last_filter = ctx;
 401     *pad_idx     = 0;
 402     return 0;
 403 }
 404
 405 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 406                          const char *filter_name, const char *args)
 407 {
 408     AVFilterGraph *graph = (*last_filter)->graph;
 409     AVFilterContext *ctx;
 410     int ret;
 411
 412     ret = avfilter_graph_create_filter(&ctx,
 413                                        avfilter_get_by_name(filter_name),
 414                                        filter_name, args, NULL, graph);
 415     if (ret < 0)
 416         return ret;
 417
 418     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 419     if (ret < 0)
 420         return ret;
 421
 422     *last_filter = ctx;
 423     *pad_idx     = 0;
 424     return 0;
 425 }
 426
 427 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 428 {
 429     char *pix_fmts;
 430     OutputStream *ost = ofilter->ost;
 431     OutputFile    *of = output_files[ost->file_index];
 432     AVFilterContext *last_filter = out->filter_ctx;
 433     int pad_idx = out->pad_idx;
 434     int ret;
 435     char name[255];
 436
 437     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 438     ret = avfilter_graph_create_filter(&ofilter->filter,
 439                                        avfilter_get_by_name("buffersink"),
 440                                        name, NULL, NULL, fg->graph);
 441
 442     if (ret < 0)
 443         return ret;
 444
 445     if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
 446         char args[255];
 447         AVFilterContext *filter;
 448         AVDictionaryEntry *e = NULL;
 449
 450         snprintf(args, sizeof(args), "%d:%d",
 451                  ofilter->width, ofilter->height);
 452
 453         while ((e = av_dict_get(ost->sws_dict, "", e,
 454                                 AV_DICT_IGNORE_SUFFIX))) {
 455             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 456         }
 457
 458         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 459                  ost->file_index, ost->index);
 460         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 461                                                 name, args, NULL, fg->graph)) < 0)
 462             return ret;
 463         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 464             return ret;
 465
 466         last_filter = filter;
 467         pad_idx = 0;
 468     }
 469
 470     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 471         AVFilterContext *filter;
 472         snprintf(name, sizeof(name), "format_out_%d_%d",
 473                  ost->file_index, ost->index);
 474         ret = avfilter_graph_create_filter(&filter,
 475                                            avfilter_get_by_name("format"),
 476                                            "format", pix_fmts, NULL, fg->graph);
 477         av_freep(&pix_fmts);
 478         if (ret < 0)
 479             return ret;
 480         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 481             return ret;
 482
 483         last_filter = filter;
 484         pad_idx     = 0;
 485     }
 486
 487     if (ost->frame_rate.num && 0) {
 488         AVFilterContext *fps;
 489         char args[255];
 490
 491         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 492                  ost->frame_rate.den);
 493         snprintf(name, sizeof(name), "fps_out_%d_%d",
 494                  ost->file_index, ost->index);
 495         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 496                                            name, args, NULL, fg->graph);
 497         if (ret < 0)
 498             return ret;
 499
 500         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 501         if (ret < 0)
 502             return ret;
 503         last_filter = fps;
 504         pad_idx = 0;
 505     }
 506
 507     snprintf(name, sizeof(name), "trim_out_%d_%d",
 508              ost->file_index, ost->index);
 509     ret = insert_trim(of->start_time, of->recording_time,
 510                       &last_filter, &pad_idx, name);
 511     if (ret < 0)
 512         return ret;
 513
 514
 515     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 516         return ret;
 517
 518     return 0;
 519 }
 520
 521 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 522 {
 523     OutputStream *ost = ofilter->ost;
 524     OutputFile    *of = output_files[ost->file_index];
 525     AVCodecContext *codec  = ost->enc_ctx;
 526     AVFilterContext *last_filter = out->filter_ctx;
 527     int pad_idx = out->pad_idx;
 528     char *sample_fmts, *sample_rates, *channel_layouts;
 529     char name[255];
 530     int ret;
 531
 532     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 533     ret = avfilter_graph_create_filter(&ofilter->filter,
 534                                        avfilter_get_by_name("abuffersink"),
 535                                        name, NULL, NULL, fg->graph);
 536     if (ret < 0)
 537         return ret;
 538     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 539         return ret;
 540
 541 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 542     AVFilterContext *filt_ctx;                                              \
 543                                                                             \
 544     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 545            "similarly to -af " filter_name "=%s.\n", arg);                  \
 546                                                                             \
 547     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 548                                        avfilter_get_by_name(filter_name),   \
 549                                        filter_name, arg, NULL, fg->graph);  \
 550     if (ret < 0)                                                            \
 551         return ret;                                                         \
 552                                                                             \
 553     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 554     if (ret < 0)                                                            \
 555         return ret;                                                         \
 556                                                                             \
 557     last_filter = filt_ctx;                                                 \
 558     pad_idx = 0;                                                            \
 559 } while (0)
 560     if (ost->audio_channels_mapped) {
 561         int i;
 562         AVBPrint pan_buf;
 563         av_bprint_init(&pan_buf, 256, 8192);
 564         av_bprintf(&pan_buf, "0x%"PRIx64,
 565                    av_get_default_channel_layout(ost->audio_channels_mapped));
 566         for (i = 0; i < ost->audio_channels_mapped; i++)
 567             if (ost->audio_channels_map[i] != -1)
 568                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 569
 570         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 571         av_bprint_finalize(&pan_buf, NULL);
 572     }
 573
 574     if (codec->channels && !codec->channel_layout)
 575         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 576
 577     sample_fmts     = choose_sample_fmts(ofilter);
 578     sample_rates    = choose_sample_rates(ofilter);
 579     channel_layouts = choose_channel_layouts(ofilter);
 580     if (sample_fmts || sample_rates || channel_layouts) {
 581         AVFilterContext *format;
 582         char args[256];
 583         args[0] = 0;
 584
 585         if (sample_fmts)
 586             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 587                             sample_fmts);
 588         if (sample_rates)
 589             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 590                             sample_rates);
 591         if (channel_layouts)
 592             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 593                             channel_layouts);
 594
 595         av_freep(&sample_fmts);
 596         av_freep(&sample_rates);
 597         av_freep(&channel_layouts);
 598
 599         snprintf(name, sizeof(name), "format_out_%d_%d",
 600                  ost->file_index, ost->index);
 601         ret = avfilter_graph_create_filter(&format,
 602                                            avfilter_get_by_name("aformat"),
 603                                            name, args, NULL, fg->graph);
 604         if (ret < 0)
 605             return ret;
 606
 607         ret = avfilter_link(last_filter, pad_idx, format, 0);
 608         if (ret < 0)
 609             return ret;
 610
 611         last_filter = format;
 612         pad_idx = 0;
 613     }
 614
 615     if (ost->apad && of->shortest) {
 616         char args[256];
 617         int i;
 618
 619         for (i=0; i<of->ctx->nb_streams; i++)
 620             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 621                 break;
 622
 623         if (i<of->ctx->nb_streams) {
 624             snprintf(args, sizeof(args), "%s", ost->apad);
 625             AUTO_INSERT_FILTER("-apad", "apad", args);
 626         }
 627     }
 628
 629     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 630              ost->file_index, ost->index);
 631     ret = insert_trim(of->start_time, of->recording_time,
 632                       &last_filter, &pad_idx, name);
 633     if (ret < 0)
 634         return ret;
 635
 636     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 637         return ret;
 638
 639     return 0;
 640 }
 641
 642 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
 643                                    AVFilterInOut *out)
 644 {
 645     if (!ofilter->ost) {
 646         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 647         exit_program(1);
 648     }
 649
 650     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 651     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 652     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 653     default: av_assert0(0);
 654     }
 655 }
 656
 657 void check_filter_outputs(void)
 658 {
 659     int i;
 660     for (i = 0; i < nb_filtergraphs; i++) {
 661         int n;
 662         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 663             OutputFilter *output = filtergraphs[i]->outputs[n];
 664             if (!output->ost) {
 665                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 666                 exit_program(1);
 667             }
 668         }
 669     }
 670 }
 671
 672 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 673 {
 674     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 675     int i, w, h;
 676
 677     /* Compute the size of the canvas for the subtitles stream.
 678        If the subtitles codecpar has set a size, use it. Otherwise use the
 679        maximum dimensions of the video streams in the same file. */
 680     w = ifilter->width;
 681     h = ifilter->height;
 682     if (!(w && h)) {
 683         for (i = 0; i < avf->nb_streams; i++) {
 684             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 685                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 686                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 687             }
 688         }
 689         if (!(w && h)) {
 690             w = FFMAX(w, 720);
 691             h = FFMAX(h, 576);
 692         }
 693         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 694     }
 695     ist->sub2video.w = ifilter->width  = w;
 696     ist->sub2video.h = ifilter->height = h;
 697
 698     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 699     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 700
 701     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 702        palettes for all rectangles are identical or compatible */
 703     ifilter->format = AV_PIX_FMT_RGB32;
 704
 705     ist->sub2video.frame = av_frame_alloc();
 706     if (!ist->sub2video.frame)
 707         return AVERROR(ENOMEM);
 708     ist->sub2video.last_pts = INT64_MIN;
 709     ist->sub2video.end_pts  = INT64_MIN;
 710
 711     /* sub2video structure has been (re-)initialized.
 712        Mark it as such so that the system will be
 713        initialized with the first received heartbeat. */
 714     ist->sub2video.initialize = 1;
 715
 716     return 0;
 717 }
 718
 719 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 720                                         AVFilterInOut *in)
 721 {
 722     AVFilterContext *last_filter;
 723     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 724     InputStream *ist = ifilter->ist;
 725     InputFile     *f = input_files[ist->file_index];
 726     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 727                                          ist->st->time_base;
 728     AVRational fr = ist->framerate;
 729     AVRational sar;
 730     AVBPrint args;
 731     char name[255];
 732     int ret, pad_idx = 0;
 733     int64_t tsoffset = 0;
 734     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 735
 736     if (!par)
 737         return AVERROR(ENOMEM);
 738     memset(par, 0, sizeof(*par));
 739     par->format = AV_PIX_FMT_NONE;
 740
 741     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 742         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 743         ret = AVERROR(EINVAL);
 744         goto fail;
 745     }
 746
 747     if (!fr.num)
 748         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 749
 750     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 751         ret = sub2video_prepare(ist, ifilter);
 752         if (ret < 0)
 753             goto fail;
 754     }
 755
 756     sar = ifilter->sample_aspect_ratio;
 757     if(!sar.den)
 758         sar = (AVRational){0,1};
 759     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 760     av_bprintf(&args,
 761              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 762              "pixel_aspect=%d/%d",
 763              ifilter->width, ifilter->height, ifilter->format,
 764              tb.num, tb.den, sar.num, sar.den);
 765     if (fr.num && fr.den)
 766         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 767     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 768              ist->file_index, ist->st->index);
 769
 770
 771     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 772                                             args.str, NULL, fg->graph)) < 0)
 773         goto fail;
 774     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 775     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 776     if (ret < 0)
 777         goto fail;
 778     av_freep(&par);
 779     last_filter = ifilter->filter;
 780
 781     if (ist->autorotate) {
 782         double theta = get_rotation(ist->st);
 783
 784         if (fabs(theta - 90) < 1.0) {
 785             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 786         } else if (fabs(theta - 180) < 1.0) {
 787             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 788             if (ret < 0)
 789                 return ret;
 790             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 791         } else if (fabs(theta - 270) < 1.0) {
 792             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 793         } else if (fabs(theta) > 1.0) {
 794             char rotate_buf[64];
 795             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 796             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 797         }
 798         if (ret < 0)
 799             return ret;
 800     }
 801
 802     if (do_deinterlace) {
 803         AVFilterContext *yadif;
 804
 805         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 806                  ist->file_index, ist->st->index);
 807         if ((ret = avfilter_graph_create_filter(&yadif,
 808                                                 avfilter_get_by_name("yadif"),
 809                                                 name, "", NULL,
 810                                                 fg->graph)) < 0)
 811             return ret;
 812
 813         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 814             return ret;
 815
 816         last_filter = yadif;
 817     }
 818
 819     snprintf(name, sizeof(name), "trim_in_%d_%d",
 820              ist->file_index, ist->st->index);
 821     if (copy_ts) {
 822         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 823         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 824             tsoffset += f->ctx->start_time;
 825     }
 826     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 827                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 828                       &last_filter, &pad_idx, name);
 829     if (ret < 0)
 830         return ret;
 831
 832     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 833         return ret;
 834     return 0;
 835 fail:
 836     av_freep(&par);
 837
 838     return ret;
 839 }
 840
 841 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 842                                         AVFilterInOut *in)
 843 {
 844     AVFilterContext *last_filter;
 845     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 846     InputStream *ist = ifilter->ist;
 847     InputFile     *f = input_files[ist->file_index];
 848     AVBPrint args;
 849     char name[255];
 850     int ret, pad_idx = 0;
 851     int64_t tsoffset = 0;
 852
 853     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 854         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 855         return AVERROR(EINVAL);
 856     }
 857
 858     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 859     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 860              1, ifilter->sample_rate,
 861              ifilter->sample_rate,
 862              av_get_sample_fmt_name(ifilter->format));
 863     if (ifilter->channel_layout)
 864         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 865                    ifilter->channel_layout);
 866     else
 867         av_bprintf(&args, ":channels=%d", ifilter->channels);
 868     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 869              ist->file_index, ist->st->index);
 870
 871     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 872                                             name, args.str, NULL,
 873                                             fg->graph)) < 0)
 874         return ret;
 875     last_filter = ifilter->filter;
 876
 877 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 878     AVFilterContext *filt_ctx;                                              \
 879                                                                             \
 880     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 881            "similarly to -af " filter_name "=%s.\n", arg);                  \
 882                                                                             \
 883     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 884                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 885     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 886                                        avfilter_get_by_name(filter_name),   \
 887                                        name, arg, NULL, fg->graph);         \
 888     if (ret < 0)                                                            \
 889         return ret;                                                         \
 890                                                                             \
 891     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 892     if (ret < 0)                                                            \
 893         return ret;                                                         \
 894                                                                             \
 895     last_filter = filt_ctx;                                                 \
 896 } while (0)
 897
 898     if (audio_sync_method > 0) {
 899         char args[256] = {0};
 900
 901         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 902         if (audio_drift_threshold != 0.1)
 903             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 904         if (!fg->reconfiguration)
 905             av_strlcatf(args, sizeof(args), ":first_pts=0");
 906         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 907     }
 908
 909 //     if (ost->audio_channels_mapped) {
 910 //         int i;
 911 //         AVBPrint pan_buf;
 912 //         av_bprint_init(&pan_buf, 256, 8192);
 913 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 914 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 915 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 916 //             if (ost->audio_channels_map[i] != -1)
 917 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 918 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 919 //         av_bprint_finalize(&pan_buf, NULL);
 920 //     }
 921
 922     if (audio_volume != 256) {
 923         char args[256];
 924
 925         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 926                "audio filter instead.\n");
 927
 928         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 929         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 930     }
 931
 932     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 933              ist->file_index, ist->st->index);
 934     if (copy_ts) {
 935         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 936         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 937             tsoffset += f->ctx->start_time;
 938     }
 939     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 940                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 941                       &last_filter, &pad_idx, name);
 942     if (ret < 0)
 943         return ret;
 944
 945     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 946         return ret;
 947
 948     return 0;
 949 }
 950
 951 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 952                                   AVFilterInOut *in)
 953 {
 954     if (!ifilter->ist->dec) {
 955         av_log(NULL, AV_LOG_ERROR,
 956                "No decoder for stream #%d:%d, filtering impossible\n",
 957                ifilter->ist->file_index, ifilter->ist->st->index);
 958         return AVERROR_DECODER_NOT_FOUND;
 959     }
 960     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 961     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 962     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 963     default: av_assert0(0);
 964     }
 965 }
 966
 967 static void cleanup_filtergraph(FilterGraph *fg)
 968 {
 969     int i;
 970     for (i = 0; i < fg->nb_outputs; i++)
 971         fg->outputs[i]->filter = (AVFilterContext *)NULL;
 972     for (i = 0; i < fg->nb_inputs; i++)
 973         fg->inputs[i]->filter = (AVFilterContext *)NULL;
 974     avfilter_graph_free(&fg->graph);
 975 }
 976
 977 int configure_filtergraph(FilterGraph *fg)
 978 {
 979     AVFilterInOut *inputs, *outputs, *cur;
 980     int ret, i, simple = filtergraph_is_simple(fg);
 981     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
 982                                       fg->graph_desc;
 983
 984     cleanup_filtergraph(fg);
 985     if (!(fg->graph = avfilter_graph_alloc()))
 986         return AVERROR(ENOMEM);
 987
 988     if (simple) {
 989         OutputStream *ost = fg->outputs[0]->ost;
 990         char args[512];
 991         AVDictionaryEntry *e = NULL;
 992
 993         fg->graph->nb_threads = filter_nbthreads;
 994
 995         args[0] = 0;
 996         while ((e = av_dict_get(ost->sws_dict, "", e,
 997                                 AV_DICT_IGNORE_SUFFIX))) {
 998             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
 999         }
1000         if (strlen(args))
1001             args[strlen(args)-1] = 0;
1002         fg->graph->scale_sws_opts = av_strdup(args);
1003
1004         args[0] = 0;
1005         while ((e = av_dict_get(ost->swr_opts, "", e,
1006                                 AV_DICT_IGNORE_SUFFIX))) {
1007             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1008         }
1009         if (strlen(args))
1010             args[strlen(args)-1] = 0;
1011         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1012
1013         args[0] = '\0';
1014         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1015                                 AV_DICT_IGNORE_SUFFIX))) {
1016             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017         }
1018         if (strlen(args))
1019             args[strlen(args) - 1] = '\0';
1020
1021         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1022         if (e)
1023             av_opt_set(fg->graph, "threads", e->value, 0);
1024     } else {
1025         fg->graph->nb_threads = filter_complex_nbthreads;
1026     }
1027
1028     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1029         goto fail;
1030
1031     ret = hw_device_setup_for_filter(fg);
1032     if (ret < 0)
1033         goto fail;
1034
1035     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1036         const char *num_inputs;
1037         const char *num_outputs;
1038         if (!outputs) {
1039             num_outputs = "0";
1040         } else if (outputs->next) {
1041             num_outputs = ">1";
1042         } else {
1043             num_outputs = "1";
1044         }
1045         if (!inputs) {
1046             num_inputs = "0";
1047         } else if (inputs->next) {
1048             num_inputs = ">1";
1049         } else {
1050             num_inputs = "1";
1051         }
1052         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1053                "to have exactly 1 input and 1 output."
1054                " However, it had %s input(s) and %s output(s)."
1055                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1056                graph_desc, num_inputs, num_outputs);
1057         ret = AVERROR(EINVAL);
1058         goto fail;
1059     }
1060
1061     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1062         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1063             avfilter_inout_free(&inputs);
1064             avfilter_inout_free(&outputs);
1065             goto fail;
1066         }
1067     avfilter_inout_free(&inputs);
1068
1069     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1070         configure_output_filter(fg, fg->outputs[i], cur);
1071     avfilter_inout_free(&outputs);
1072
1073     if (!auto_conversion_filters)
1074         avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1075     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1076         goto fail;
1077
1078     /* limit the lists of allowed formats to the ones selected, to
1079      * make sure they stay the same if the filtergraph is reconfigured later */
1080     for (i = 0; i < fg->nb_outputs; i++) {
1081         OutputFilter *ofilter = fg->outputs[i];
1082         AVFilterContext *sink = ofilter->filter;
1083
1084         ofilter->format = av_buffersink_get_format(sink);
1085
1086         ofilter->width  = av_buffersink_get_w(sink);
1087         ofilter->height = av_buffersink_get_h(sink);
1088
1089         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1090         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1091     }
1092
1093     fg->reconfiguration = 1;
1094
1095     for (i = 0; i < fg->nb_outputs; i++) {
1096         OutputStream *ost = fg->outputs[i]->ost;
1097         if (!ost->enc) {
1098             /* identical to the same check in ffmpeg.c, needed because
1099                complex filter graphs are initialized earlier */
1100             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1101                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1102             ret = AVERROR(EINVAL);
1103             goto fail;
1104         }
1105         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1106             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1107             av_buffersink_set_frame_size(ost->filter->filter,
1108                                          ost->enc_ctx->frame_size);
1109     }
1110
1111     for (i = 0; i < fg->nb_inputs; i++) {
1112         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1113             AVFrame *tmp;
1114             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1115             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1116             av_frame_free(&tmp);
1117             if (ret < 0)
1118                 goto fail;
1119         }
1120     }
1121
1122     /* send the EOFs for the finished inputs */
1123     for (i = 0; i < fg->nb_inputs; i++) {
1124         if (fg->inputs[i]->eof) {
1125             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1126             if (ret < 0)
1127                 goto fail;
1128         }
1129     }
1130
1131     /* process queued up subtitle packets */
1132     for (i = 0; i < fg->nb_inputs; i++) {
1133         InputStream *ist = fg->inputs[i]->ist;
1134         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1135             while (av_fifo_size(ist->sub2video.sub_queue)) {
1136                 AVSubtitle tmp;
1137                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1138                 sub2video_update(ist, INT64_MIN, &tmp);
1139                 avsubtitle_free(&tmp);
1140             }
1141         }
1142     }
1143
1144     return 0;
1145
1146 fail:
1147     cleanup_filtergraph(fg);
1148     return ret;
1149 }
1150
1151 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1152 {
1153     av_buffer_unref(&ifilter->hw_frames_ctx);
1154
1155     ifilter->format = frame->format;
1156
1157     ifilter->width               = frame->width;
1158     ifilter->height              = frame->height;
1159     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1160
1161     ifilter->sample_rate         = frame->sample_rate;
1162     ifilter->channels            = frame->channels;
1163     ifilter->channel_layout      = frame->channel_layout;
1164
1165     if (frame->hw_frames_ctx) {
1166         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1167         if (!ifilter->hw_frames_ctx)
1168             return AVERROR(ENOMEM);
1169     }
1170
1171     return 0;
1172 }
1173
1174 int filtergraph_is_simple(FilterGraph *fg)
1175 {
1176     return !fg->graph_desc;
1177 }