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