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 "libavutil/avassert.h"
  30 #include "libavutil/avstring.h"
  31 #include "libavutil/bprint.h"
  32 #include "libavutil/channel_layout.h"
  33 #include "libavutil/display.h"
  34 #include "libavutil/opt.h"
  35 #include "libavutil/pixdesc.h"
  36 #include "libavutil/pixfmt.h"
  37 #include "libavutil/imgutils.h"
  38 #include "libavutil/samplefmt.h"
  39
  40 // FIXME: YUV420P etc. are actually supported with full color range,
  41 // yet the latter information isn't available here.
  42 static const enum AVPixelFormat *get_compliance_normal_pix_fmts(const AVCodec *codec, const enum AVPixelFormat default_formats[])
  43 {
  44     static const enum AVPixelFormat mjpeg_formats[] =
  45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
  46           AV_PIX_FMT_NONE };
  47
  48     if (!strcmp(codec->name, "mjpeg")) {
  49         return mjpeg_formats;
  50     } else {
  51         return default_formats;
  52     }
  53 }
  54
  55 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
  56                                     const AVCodec *codec, enum AVPixelFormat target)
  57 {
  58     if (codec && codec->pix_fmts) {
  59         const enum AVPixelFormat *p = codec->pix_fmts;
  60         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
  61         //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
  62         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
  63         enum AVPixelFormat best= AV_PIX_FMT_NONE;
  64
  65         if (enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
  66             p = get_compliance_normal_pix_fmts(codec, p);
  67         }
  68         for (; *p != AV_PIX_FMT_NONE; p++) {
  69             best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
  70             if (*p == target)
  71                 break;
  72         }
  73         if (*p == AV_PIX_FMT_NONE) {
  74             if (target != AV_PIX_FMT_NONE)
  75                 av_log(NULL, AV_LOG_WARNING,
  76                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
  77                        av_get_pix_fmt_name(target),
  78                        codec->name,
  79                        av_get_pix_fmt_name(best));
  80             return best;
  81         }
  82     }
  83     return target;
  84 }
  85
  86 static char *choose_pix_fmts(OutputFilter *ofilter)
  87 {
  88     OutputStream *ost = ofilter->ost;
  89     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
  90     if (strict_dict)
  91         // used by choose_pixel_fmt() and below
  92         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
  93
  94      if (ost->keep_pix_fmt) {
  95         avfilter_graph_set_auto_convert(ofilter->graph->graph,
  96                                             AVFILTER_AUTO_CONVERT_NONE);
  97         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
  98             return NULL;
  99         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 100     }
 101     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 102         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 103     } else if (ost->enc && ost->enc->pix_fmts) {
 104         const enum AVPixelFormat *p;
 105         AVIOContext *s = NULL;
 106         uint8_t *ret;
 107         int len;
 108
 109         if (avio_open_dyn_buf(&s) < 0)
 110             exit_program(1);
 111
 112         p = ost->enc->pix_fmts;
 113         if (ost->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 114             p = get_compliance_normal_pix_fmts(ost->enc, p);
 115         }
 116
 117         for (; *p != AV_PIX_FMT_NONE; p++) {
 118             const char *name = av_get_pix_fmt_name(*p);
 119             avio_printf(s, "%s|", name);
 120         }
 121         len = avio_close_dyn_buf(s, &ret);
 122         ret[len - 1] = 0;
 123         return ret;
 124     } else
 125         return NULL;
 126 }
 127
 128 /* Define a function for appending a list of allowed formats
 129  * to an AVBPrint. If nonempty, the list will have a header. */
 130 #define DEF_CHOOSE_FORMAT(name, type, var, supported_list, none, printf_format, get_name) \
 131 static void choose_ ## name (OutputFilter *ofilter, AVBPrint *bprint)          \
 132 {                                                                              \
 133     if (ofilter->var == none && !ofilter->supported_list)                      \
 134         return;                                                                \
 135     av_bprintf(bprint, #name "=");                                             \
 136     if (ofilter->var != none) {                                                \
 137         av_bprintf(bprint, printf_format, get_name(ofilter->var));             \
 138     } else {                                                                   \
 139         const type *p;                                                         \
 140                                                                                \
 141         for (p = ofilter->supported_list; *p != none; p++) {                   \
 142             av_bprintf(bprint, printf_format "|", get_name(*p));               \
 143         }                                                                      \
 144         if (bprint->len > 0)                                                   \
 145             bprint->str[--bprint->len] = '\0';                                 \
 146     }                                                                          \
 147     av_bprint_chars(bprint, ':', 1);                                           \
 148 }
 149
 150 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 151 //                  GET_PIX_FMT_NAME)
 152
 153 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 154                   AV_SAMPLE_FMT_NONE, "%s", av_get_sample_fmt_name)
 155
 156 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 157                   "%d", )
 158
 159 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 160                   "0x%"PRIx64, )
 161
 162 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 163 {
 164     FilterGraph *fg = av_mallocz(sizeof(*fg));
 165
 166     if (!fg)
 167         exit_program(1);
 168     fg->index = nb_filtergraphs;
 169
 170     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 171     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 172         exit_program(1);
 173     fg->outputs[0]->ost   = ost;
 174     fg->outputs[0]->graph = fg;
 175     fg->outputs[0]->format = -1;
 176
 177     ost->filter = fg->outputs[0];
 178
 179     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 180     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 181         exit_program(1);
 182     fg->inputs[0]->ist   = ist;
 183     fg->inputs[0]->graph = fg;
 184     fg->inputs[0]->format = -1;
 185
 186     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 187     if (!fg->inputs[0]->frame_queue)
 188         exit_program(1);
 189
 190     GROW_ARRAY(ist->filters, ist->nb_filters);
 191     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 192
 193     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 194     filtergraphs[nb_filtergraphs - 1] = fg;
 195
 196     return 0;
 197 }
 198
 199 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 200 {
 201     AVFilterContext *ctx = inout->filter_ctx;
 202     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 203     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 204     AVIOContext *pb;
 205     uint8_t *res = NULL;
 206
 207     if (avio_open_dyn_buf(&pb) < 0)
 208         exit_program(1);
 209
 210     avio_printf(pb, "%s", ctx->filter->name);
 211     if (nb_pads > 1)
 212         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 213     avio_w8(pb, 0);
 214     avio_close_dyn_buf(pb, &res);
 215     return res;
 216 }
 217
 218 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 219 {
 220     InputStream *ist = NULL;
 221     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 222     int i;
 223
 224     // TODO: support other filter types
 225     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 226         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 227                "currently.\n");
 228         exit_program(1);
 229     }
 230
 231     if (in->name) {
 232         AVFormatContext *s;
 233         AVStream       *st = NULL;
 234         char *p;
 235         int file_idx = strtol(in->name, &p, 0);
 236
 237         if (file_idx < 0 || file_idx >= nb_input_files) {
 238             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 239                    file_idx, fg->graph_desc);
 240             exit_program(1);
 241         }
 242         s = input_files[file_idx]->ctx;
 243
 244         for (i = 0; i < s->nb_streams; i++) {
 245             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 246             if (stream_type != type &&
 247                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 248                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 249                 continue;
 250             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 251                 st = s->streams[i];
 252                 break;
 253             }
 254         }
 255         if (!st) {
 256             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 257                    "matches no streams.\n", p, fg->graph_desc);
 258             exit_program(1);
 259         }
 260         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 261         if (ist->user_set_discard == AVDISCARD_ALL) {
 262             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 263                    "matches a disabled input stream.\n", p, fg->graph_desc);
 264             exit_program(1);
 265         }
 266     } else {
 267         /* find the first unused stream of corresponding type */
 268         for (i = 0; i < nb_input_streams; i++) {
 269             ist = input_streams[i];
 270             if (ist->user_set_discard == AVDISCARD_ALL)
 271                 continue;
 272             if (ist->dec_ctx->codec_type == type && ist->discard)
 273                 break;
 274         }
 275         if (i == nb_input_streams) {
 276             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 277                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 278                    in->filter_ctx->name);
 279             exit_program(1);
 280         }
 281     }
 282     av_assert0(ist);
 283
 284     ist->discard         = 0;
 285     ist->decoding_needed |= DECODING_FOR_FILTER;
 286     ist->st->discard = AVDISCARD_NONE;
 287
 288     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 289     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 290         exit_program(1);
 291     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 292     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 293     fg->inputs[fg->nb_inputs - 1]->format = -1;
 294     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 295     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 296
 297     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 298     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 299         exit_program(1);
 300
 301     GROW_ARRAY(ist->filters, ist->nb_filters);
 302     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 303 }
 304
 305 int init_complex_filtergraph(FilterGraph *fg)
 306 {
 307     AVFilterInOut *inputs, *outputs, *cur;
 308     AVFilterGraph *graph;
 309     int ret = 0;
 310
 311     /* this graph is only used for determining the kinds of inputs
 312      * and outputs we have, and is discarded on exit from this function */
 313     graph = avfilter_graph_alloc();
 314     if (!graph)
 315         return AVERROR(ENOMEM);
 316     graph->nb_threads = 1;
 317
 318     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 319     if (ret < 0)
 320         goto fail;
 321
 322     for (cur = inputs; cur; cur = cur->next)
 323         init_input_filter(fg, cur);
 324
 325     for (cur = outputs; cur;) {
 326         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 327         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 328         if (!fg->outputs[fg->nb_outputs - 1])
 329             exit_program(1);
 330
 331         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 332         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 333         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 334                                                                          cur->pad_idx);
 335         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 336         cur = cur->next;
 337         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 338     }
 339
 340 fail:
 341     avfilter_inout_free(&inputs);
 342     avfilter_graph_free(&graph);
 343     return ret;
 344 }
 345
 346 static int insert_trim(int64_t start_time, int64_t duration,
 347                        AVFilterContext **last_filter, int *pad_idx,
 348                        const char *filter_name)
 349 {
 350     AVFilterGraph *graph = (*last_filter)->graph;
 351     AVFilterContext *ctx;
 352     const AVFilter *trim;
 353     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 354     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 355     int ret = 0;
 356
 357     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 358         return 0;
 359
 360     trim = avfilter_get_by_name(name);
 361     if (!trim) {
 362         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 363                "recording time.\n", name);
 364         return AVERROR_FILTER_NOT_FOUND;
 365     }
 366
 367     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 368     if (!ctx)
 369         return AVERROR(ENOMEM);
 370
 371     if (duration != INT64_MAX) {
 372         ret = av_opt_set_int(ctx, "durationi", duration,
 373                                 AV_OPT_SEARCH_CHILDREN);
 374     }
 375     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 376         ret = av_opt_set_int(ctx, "starti", start_time,
 377                                 AV_OPT_SEARCH_CHILDREN);
 378     }
 379     if (ret < 0) {
 380         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 381         return ret;
 382     }
 383
 384     ret = avfilter_init_str(ctx, NULL);
 385     if (ret < 0)
 386         return ret;
 387
 388     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 389     if (ret < 0)
 390         return ret;
 391
 392     *last_filter = ctx;
 393     *pad_idx     = 0;
 394     return 0;
 395 }
 396
 397 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 398                          const char *filter_name, const char *args)
 399 {
 400     AVFilterGraph *graph = (*last_filter)->graph;
 401     AVFilterContext *ctx;
 402     int ret;
 403
 404     ret = avfilter_graph_create_filter(&ctx,
 405                                        avfilter_get_by_name(filter_name),
 406                                        filter_name, args, NULL, graph);
 407     if (ret < 0)
 408         return ret;
 409
 410     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 411     if (ret < 0)
 412         return ret;
 413
 414     *last_filter = ctx;
 415     *pad_idx     = 0;
 416     return 0;
 417 }
 418
 419 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 420 {
 421     char *pix_fmts;
 422     OutputStream *ost = ofilter->ost;
 423     OutputFile    *of = output_files[ost->file_index];
 424     AVFilterContext *last_filter = out->filter_ctx;
 425     int pad_idx = out->pad_idx;
 426     int ret;
 427     char name[255];
 428
 429     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 430     ret = avfilter_graph_create_filter(&ofilter->filter,
 431                                        avfilter_get_by_name("buffersink"),
 432                                        name, NULL, NULL, fg->graph);
 433
 434     if (ret < 0)
 435         return ret;
 436
 437     if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
 438         char args[255];
 439         AVFilterContext *filter;
 440         AVDictionaryEntry *e = NULL;
 441
 442         snprintf(args, sizeof(args), "%d:%d",
 443                  ofilter->width, ofilter->height);
 444
 445         while ((e = av_dict_get(ost->sws_dict, "", e,
 446                                 AV_DICT_IGNORE_SUFFIX))) {
 447             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 448         }
 449
 450         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 451                  ost->file_index, ost->index);
 452         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 453                                                 name, args, NULL, fg->graph)) < 0)
 454             return ret;
 455         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 456             return ret;
 457
 458         last_filter = filter;
 459         pad_idx = 0;
 460     }
 461
 462     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 463         AVFilterContext *filter;
 464
 465         ret = avfilter_graph_create_filter(&filter,
 466                                            avfilter_get_by_name("format"),
 467                                            "format", pix_fmts, NULL, fg->graph);
 468         av_freep(&pix_fmts);
 469         if (ret < 0)
 470             return ret;
 471         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 472             return ret;
 473
 474         last_filter = filter;
 475         pad_idx     = 0;
 476     }
 477
 478     if (ost->frame_rate.num && 0) {
 479         AVFilterContext *fps;
 480         char args[255];
 481
 482         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 483                  ost->frame_rate.den);
 484         snprintf(name, sizeof(name), "fps_out_%d_%d",
 485                  ost->file_index, ost->index);
 486         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 487                                            name, args, NULL, fg->graph);
 488         if (ret < 0)
 489             return ret;
 490
 491         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 492         if (ret < 0)
 493             return ret;
 494         last_filter = fps;
 495         pad_idx = 0;
 496     }
 497
 498     snprintf(name, sizeof(name), "trim_out_%d_%d",
 499              ost->file_index, ost->index);
 500     ret = insert_trim(of->start_time, of->recording_time,
 501                       &last_filter, &pad_idx, name);
 502     if (ret < 0)
 503         return ret;
 504
 505
 506     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 507         return ret;
 508
 509     return 0;
 510 }
 511
 512 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 513 {
 514     OutputStream *ost = ofilter->ost;
 515     OutputFile    *of = output_files[ost->file_index];
 516     AVCodecContext *codec  = ost->enc_ctx;
 517     AVFilterContext *last_filter = out->filter_ctx;
 518     int pad_idx = out->pad_idx;
 519     AVBPrint args;
 520     char name[255];
 521     int ret;
 522
 523     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 524     ret = avfilter_graph_create_filter(&ofilter->filter,
 525                                        avfilter_get_by_name("abuffersink"),
 526                                        name, NULL, NULL, fg->graph);
 527     if (ret < 0)
 528         return ret;
 529     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 530         return ret;
 531
 532 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 533     AVFilterContext *filt_ctx;                                              \
 534                                                                             \
 535     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 536            "similarly to -af " filter_name "=%s.\n", arg);                  \
 537                                                                             \
 538     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 539                                        avfilter_get_by_name(filter_name),   \
 540                                        filter_name, arg, NULL, fg->graph);  \
 541     if (ret < 0)                                                            \
 542         goto fail;                                                          \
 543                                                                             \
 544     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 545     if (ret < 0)                                                            \
 546         goto fail;                                                          \
 547                                                                             \
 548     last_filter = filt_ctx;                                                 \
 549     pad_idx = 0;                                                            \
 550 } while (0)
 551     av_bprint_init(&args, 0, AV_BPRINT_SIZE_UNLIMITED);
 552     if (ost->audio_channels_mapped) {
 553         int i;
 554         av_bprintf(&args, "0x%"PRIx64,
 555                    av_get_default_channel_layout(ost->audio_channels_mapped));
 556         for (i = 0; i < ost->audio_channels_mapped; i++)
 557             if (ost->audio_channels_map[i] != -1)
 558                 av_bprintf(&args, "|c%d=c%d", i, ost->audio_channels_map[i]);
 559
 560         AUTO_INSERT_FILTER("-map_channel", "pan", args.str);
 561         av_bprint_clear(&args);
 562     }
 563
 564     if (codec->channels && !codec->channel_layout)
 565         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 566
 567     choose_sample_fmts(ofilter,     &args);
 568     choose_sample_rates(ofilter,    &args);
 569     choose_channel_layouts(ofilter, &args);
 570     if (!av_bprint_is_complete(&args)) {
 571         ret = AVERROR(ENOMEM);
 572         goto fail;
 573     }
 574     if (args.len) {
 575         AVFilterContext *format;
 576
 577         snprintf(name, sizeof(name), "format_out_%d_%d",
 578                  ost->file_index, ost->index);
 579         ret = avfilter_graph_create_filter(&format,
 580                                            avfilter_get_by_name("aformat"),
 581                                            name, args.str, NULL, fg->graph);
 582         if (ret < 0)
 583             goto fail;
 584
 585         ret = avfilter_link(last_filter, pad_idx, format, 0);
 586         if (ret < 0)
 587             goto fail;
 588
 589         last_filter = format;
 590         pad_idx = 0;
 591     }
 592
 593     if (ost->apad && of->shortest) {
 594         int i;
 595
 596         for (i=0; i<of->ctx->nb_streams; i++)
 597             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 598                 break;
 599
 600         if (i<of->ctx->nb_streams) {
 601             AUTO_INSERT_FILTER("-apad", "apad", ost->apad);
 602         }
 603     }
 604
 605     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 606              ost->file_index, ost->index);
 607     ret = insert_trim(of->start_time, of->recording_time,
 608                       &last_filter, &pad_idx, name);
 609     if (ret < 0)
 610         goto fail;
 611
 612     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 613         goto fail;
 614 fail:
 615     av_bprint_finalize(&args, NULL);
 616
 617     return ret;
 618 }
 619
 620 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
 621                                    AVFilterInOut *out)
 622 {
 623     if (!ofilter->ost) {
 624         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 625         exit_program(1);
 626     }
 627
 628     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 629     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 630     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 631     default: av_assert0(0);
 632     }
 633 }
 634
 635 void check_filter_outputs(void)
 636 {
 637     int i;
 638     for (i = 0; i < nb_filtergraphs; i++) {
 639         int n;
 640         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 641             OutputFilter *output = filtergraphs[i]->outputs[n];
 642             if (!output->ost) {
 643                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 644                 exit_program(1);
 645             }
 646         }
 647     }
 648 }
 649
 650 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 651 {
 652     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 653     int i, w, h;
 654
 655     /* Compute the size of the canvas for the subtitles stream.
 656        If the subtitles codecpar has set a size, use it. Otherwise use the
 657        maximum dimensions of the video streams in the same file. */
 658     w = ifilter->width;
 659     h = ifilter->height;
 660     if (!(w && h)) {
 661         for (i = 0; i < avf->nb_streams; i++) {
 662             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 663                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 664                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 665             }
 666         }
 667         if (!(w && h)) {
 668             w = FFMAX(w, 720);
 669             h = FFMAX(h, 576);
 670         }
 671         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 672     }
 673     ist->sub2video.w = ifilter->width  = w;
 674     ist->sub2video.h = ifilter->height = h;
 675
 676     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 677     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 678
 679     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 680        palettes for all rectangles are identical or compatible */
 681     ifilter->format = AV_PIX_FMT_RGB32;
 682
 683     ist->sub2video.frame = av_frame_alloc();
 684     if (!ist->sub2video.frame)
 685         return AVERROR(ENOMEM);
 686     ist->sub2video.last_pts = INT64_MIN;
 687     ist->sub2video.end_pts  = INT64_MIN;
 688
 689     /* sub2video structure has been (re-)initialized.
 690        Mark it as such so that the system will be
 691        initialized with the first received heartbeat. */
 692     ist->sub2video.initialize = 1;
 693
 694     return 0;
 695 }
 696
 697 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 698                                         AVFilterInOut *in)
 699 {
 700     AVFilterContext *last_filter;
 701     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 702     InputStream *ist = ifilter->ist;
 703     InputFile     *f = input_files[ist->file_index];
 704     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 705                                          ist->st->time_base;
 706     AVRational fr = ist->framerate;
 707     AVRational sar;
 708     AVBPrint args;
 709     char name[255];
 710     int ret, pad_idx = 0;
 711     int64_t tsoffset = 0;
 712     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 713
 714     if (!par)
 715         return AVERROR(ENOMEM);
 716     memset(par, 0, sizeof(*par));
 717     par->format = AV_PIX_FMT_NONE;
 718
 719     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 720         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 721         ret = AVERROR(EINVAL);
 722         goto fail;
 723     }
 724
 725     if (!fr.num)
 726         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 727
 728     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 729         ret = sub2video_prepare(ist, ifilter);
 730         if (ret < 0)
 731             goto fail;
 732     }
 733
 734     sar = ifilter->sample_aspect_ratio;
 735     if(!sar.den)
 736         sar = (AVRational){0,1};
 737     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 738     av_bprintf(&args,
 739              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 740              "pixel_aspect=%d/%d",
 741              ifilter->width, ifilter->height, ifilter->format,
 742              tb.num, tb.den, sar.num, sar.den);
 743     if (fr.num && fr.den)
 744         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 745     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 746              ist->file_index, ist->st->index);
 747
 748
 749     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 750                                             args.str, NULL, fg->graph)) < 0)
 751         goto fail;
 752     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 753     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 754     if (ret < 0)
 755         goto fail;
 756     av_freep(&par);
 757     last_filter = ifilter->filter;
 758
 759     if (ist->autorotate) {
 760         double theta = get_rotation(ist->st);
 761
 762         if (fabs(theta - 90) < 1.0) {
 763             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 764         } else if (fabs(theta - 180) < 1.0) {
 765             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 766             if (ret < 0)
 767                 return ret;
 768             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 769         } else if (fabs(theta - 270) < 1.0) {
 770             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 771         } else if (fabs(theta) > 1.0) {
 772             char rotate_buf[64];
 773             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 774             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 775         }
 776         if (ret < 0)
 777             return ret;
 778     }
 779
 780     if (do_deinterlace) {
 781         AVFilterContext *yadif;
 782
 783         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 784                  ist->file_index, ist->st->index);
 785         if ((ret = avfilter_graph_create_filter(&yadif,
 786                                                 avfilter_get_by_name("yadif"),
 787                                                 name, "", NULL,
 788                                                 fg->graph)) < 0)
 789             return ret;
 790
 791         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 792             return ret;
 793
 794         last_filter = yadif;
 795     }
 796
 797     snprintf(name, sizeof(name), "trim_in_%d_%d",
 798              ist->file_index, ist->st->index);
 799     if (copy_ts) {
 800         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 801         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 802             tsoffset += f->ctx->start_time;
 803     }
 804     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 805                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 806                       &last_filter, &pad_idx, name);
 807     if (ret < 0)
 808         return ret;
 809
 810     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 811         return ret;
 812     return 0;
 813 fail:
 814     av_freep(&par);
 815
 816     return ret;
 817 }
 818
 819 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 820                                         AVFilterInOut *in)
 821 {
 822     AVFilterContext *last_filter;
 823     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 824     InputStream *ist = ifilter->ist;
 825     InputFile     *f = input_files[ist->file_index];
 826     AVBPrint args;
 827     char name[255];
 828     int ret, pad_idx = 0;
 829     int64_t tsoffset = 0;
 830
 831     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 832         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 833         return AVERROR(EINVAL);
 834     }
 835
 836     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 837     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 838              1, ifilter->sample_rate,
 839              ifilter->sample_rate,
 840              av_get_sample_fmt_name(ifilter->format));
 841     if (ifilter->channel_layout)
 842         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 843                    ifilter->channel_layout);
 844     else
 845         av_bprintf(&args, ":channels=%d", ifilter->channels);
 846     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 847              ist->file_index, ist->st->index);
 848
 849     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 850                                             name, args.str, NULL,
 851                                             fg->graph)) < 0)
 852         return ret;
 853     last_filter = ifilter->filter;
 854
 855 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 856     AVFilterContext *filt_ctx;                                              \
 857                                                                             \
 858     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 859            "similarly to -af " filter_name "=%s.\n", arg);                  \
 860                                                                             \
 861     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 862                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 863     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 864                                        avfilter_get_by_name(filter_name),   \
 865                                        name, arg, NULL, fg->graph);         \
 866     if (ret < 0)                                                            \
 867         return ret;                                                         \
 868                                                                             \
 869     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 870     if (ret < 0)                                                            \
 871         return ret;                                                         \
 872                                                                             \
 873     last_filter = filt_ctx;                                                 \
 874 } while (0)
 875
 876     if (audio_sync_method > 0) {
 877         char args[256] = {0};
 878
 879         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 880         if (audio_drift_threshold != 0.1)
 881             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 882         if (!fg->reconfiguration)
 883             av_strlcatf(args, sizeof(args), ":first_pts=0");
 884         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 885     }
 886
 887 //     if (ost->audio_channels_mapped) {
 888 //         int i;
 889 //         AVBPrint pan_buf;
 890 //         av_bprint_init(&pan_buf, 256, 8192);
 891 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 892 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 893 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 894 //             if (ost->audio_channels_map[i] != -1)
 895 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 896 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 897 //         av_bprint_finalize(&pan_buf, NULL);
 898 //     }
 899
 900     if (audio_volume != 256) {
 901         char args[256];
 902
 903         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 904                "audio filter instead.\n");
 905
 906         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 907         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 908     }
 909
 910     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 911              ist->file_index, ist->st->index);
 912     if (copy_ts) {
 913         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 914         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 915             tsoffset += f->ctx->start_time;
 916     }
 917     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 918                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 919                       &last_filter, &pad_idx, name);
 920     if (ret < 0)
 921         return ret;
 922
 923     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 924         return ret;
 925
 926     return 0;
 927 }
 928
 929 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 930                                   AVFilterInOut *in)
 931 {
 932     if (!ifilter->ist->dec) {
 933         av_log(NULL, AV_LOG_ERROR,
 934                "No decoder for stream #%d:%d, filtering impossible\n",
 935                ifilter->ist->file_index, ifilter->ist->st->index);
 936         return AVERROR_DECODER_NOT_FOUND;
 937     }
 938     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 939     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 940     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 941     default: av_assert0(0);
 942     }
 943 }
 944
 945 static void cleanup_filtergraph(FilterGraph *fg)
 946 {
 947     int i;
 948     for (i = 0; i < fg->nb_outputs; i++)
 949         fg->outputs[i]->filter = (AVFilterContext *)NULL;
 950     for (i = 0; i < fg->nb_inputs; i++)
 951         fg->inputs[i]->filter = (AVFilterContext *)NULL;
 952     avfilter_graph_free(&fg->graph);
 953 }
 954
 955 int configure_filtergraph(FilterGraph *fg)
 956 {
 957     AVFilterInOut *inputs, *outputs, *cur;
 958     int ret, i, simple = filtergraph_is_simple(fg);
 959     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
 960                                       fg->graph_desc;
 961
 962     cleanup_filtergraph(fg);
 963     if (!(fg->graph = avfilter_graph_alloc()))
 964         return AVERROR(ENOMEM);
 965
 966     if (simple) {
 967         OutputStream *ost = fg->outputs[0]->ost;
 968         char args[512];
 969         AVDictionaryEntry *e = NULL;
 970
 971         fg->graph->nb_threads = filter_nbthreads;
 972
 973         args[0] = 0;
 974         while ((e = av_dict_get(ost->sws_dict, "", e,
 975                                 AV_DICT_IGNORE_SUFFIX))) {
 976             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
 977         }
 978         if (strlen(args))
 979             args[strlen(args)-1] = 0;
 980         fg->graph->scale_sws_opts = av_strdup(args);
 981
 982         args[0] = 0;
 983         while ((e = av_dict_get(ost->swr_opts, "", e,
 984                                 AV_DICT_IGNORE_SUFFIX))) {
 985             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
 986         }
 987         if (strlen(args))
 988             args[strlen(args)-1] = 0;
 989         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
 990
 991         args[0] = '\0';
 992         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
 993                                 AV_DICT_IGNORE_SUFFIX))) {
 994             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
 995         }
 996         if (strlen(args))
 997             args[strlen(args) - 1] = '\0';
 998
 999         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1000         if (e)
1001             av_opt_set(fg->graph, "threads", e->value, 0);
1002     } else {
1003         fg->graph->nb_threads = filter_complex_nbthreads;
1004     }
1005
1006     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1007         goto fail;
1008
1009     ret = hw_device_setup_for_filter(fg);
1010     if (ret < 0)
1011         goto fail;
1012
1013     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1014         const char *num_inputs;
1015         const char *num_outputs;
1016         if (!outputs) {
1017             num_outputs = "0";
1018         } else if (outputs->next) {
1019             num_outputs = ">1";
1020         } else {
1021             num_outputs = "1";
1022         }
1023         if (!inputs) {
1024             num_inputs = "0";
1025         } else if (inputs->next) {
1026             num_inputs = ">1";
1027         } else {
1028             num_inputs = "1";
1029         }
1030         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1031                "to have exactly 1 input and 1 output."
1032                " However, it had %s input(s) and %s output(s)."
1033                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1034                graph_desc, num_inputs, num_outputs);
1035         ret = AVERROR(EINVAL);
1036         goto fail;
1037     }
1038
1039     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1040         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1041             avfilter_inout_free(&inputs);
1042             avfilter_inout_free(&outputs);
1043             goto fail;
1044         }
1045     avfilter_inout_free(&inputs);
1046
1047     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1048         configure_output_filter(fg, fg->outputs[i], cur);
1049     avfilter_inout_free(&outputs);
1050
1051     if (!auto_conversion_filters)
1052         avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1053     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1054         goto fail;
1055
1056     /* limit the lists of allowed formats to the ones selected, to
1057      * make sure they stay the same if the filtergraph is reconfigured later */
1058     for (i = 0; i < fg->nb_outputs; i++) {
1059         OutputFilter *ofilter = fg->outputs[i];
1060         AVFilterContext *sink = ofilter->filter;
1061
1062         ofilter->format = av_buffersink_get_format(sink);
1063
1064         ofilter->width  = av_buffersink_get_w(sink);
1065         ofilter->height = av_buffersink_get_h(sink);
1066
1067         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1068         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1069     }
1070
1071     fg->reconfiguration = 1;
1072
1073     for (i = 0; i < fg->nb_outputs; i++) {
1074         OutputStream *ost = fg->outputs[i]->ost;
1075         if (!ost->enc) {
1076             /* identical to the same check in ffmpeg.c, needed because
1077                complex filter graphs are initialized earlier */
1078             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1079                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1080             ret = AVERROR(EINVAL);
1081             goto fail;
1082         }
1083         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1084             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1085             av_buffersink_set_frame_size(ost->filter->filter,
1086                                          ost->enc_ctx->frame_size);
1087     }
1088
1089     for (i = 0; i < fg->nb_inputs; i++) {
1090         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1091             AVFrame *tmp;
1092             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1093             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1094             av_frame_free(&tmp);
1095             if (ret < 0)
1096                 goto fail;
1097         }
1098     }
1099
1100     /* send the EOFs for the finished inputs */
1101     for (i = 0; i < fg->nb_inputs; i++) {
1102         if (fg->inputs[i]->eof) {
1103             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1104             if (ret < 0)
1105                 goto fail;
1106         }
1107     }
1108
1109     /* process queued up subtitle packets */
1110     for (i = 0; i < fg->nb_inputs; i++) {
1111         InputStream *ist = fg->inputs[i]->ist;
1112         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1113             while (av_fifo_size(ist->sub2video.sub_queue)) {
1114                 AVSubtitle tmp;
1115                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1116                 sub2video_update(ist, INT64_MIN, &tmp);
1117                 avsubtitle_free(&tmp);
1118             }
1119         }
1120     }
1121
1122     return 0;
1123
1124 fail:
1125     cleanup_filtergraph(fg);
1126     return ret;
1127 }
1128
1129 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1130 {
1131     av_buffer_unref(&ifilter->hw_frames_ctx);
1132
1133     ifilter->format = frame->format;
1134
1135     ifilter->width               = frame->width;
1136     ifilter->height              = frame->height;
1137     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1138
1139     ifilter->sample_rate         = frame->sample_rate;
1140     ifilter->channels            = frame->channels;
1141     ifilter->channel_layout      = frame->channel_layout;
1142
1143     if (frame->hw_frames_ctx) {
1144         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1145         if (!ifilter->hw_frames_ctx)
1146             return AVERROR(ENOMEM);
1147     }
1148
1149     return 0;
1150 }
1151
1152 int filtergraph_is_simple(FilterGraph *fg)
1153 {
1154     return !fg->graph_desc;
1155 }