git.sesse.net Git - ffmpeg/blob - fftools/ffmpeg_filter.c

   1 /*
   2  * ffmpeg filter configuration
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <stdint.h>
  22
  23 #include "ffmpeg.h"
  24
  25 #include "libavfilter/avfilter.h"
  26 #include "libavfilter/buffersink.h"
  27 #include "libavfilter/buffersrc.h"
  28
  29 #include "libavresample/avresample.h"
  30
  31 #include "libavutil/avassert.h"
  32 #include "libavutil/avstring.h"
  33 #include "libavutil/bprint.h"
  34 #include "libavutil/channel_layout.h"
  35 #include "libavutil/display.h"
  36 #include "libavutil/opt.h"
  37 #include "libavutil/pixdesc.h"
  38 #include "libavutil/pixfmt.h"
  39 #include "libavutil/imgutils.h"
  40 #include "libavutil/samplefmt.h"
  41
  42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
  43 {
  44     static const enum AVPixelFormat mjpeg_formats[] =
  45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
  46           AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
  47           AV_PIX_FMT_NONE };
  48     static const enum AVPixelFormat ljpeg_formats[] =
  49         { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
  50           AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
  51           AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
  52           AV_PIX_FMT_NONE};
  53
  54     if (codec_id == AV_CODEC_ID_MJPEG) {
  55         return mjpeg_formats;
  56     } else if (codec_id == AV_CODEC_ID_LJPEG) {
  57         return ljpeg_formats;
  58     } else {
  59         return default_formats;
  60     }
  61 }
  62
  63 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
  64                                     const AVCodec *codec, enum AVPixelFormat target)
  65 {
  66     if (codec && codec->pix_fmts) {
  67         const enum AVPixelFormat *p = codec->pix_fmts;
  68         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
  69         //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
  70         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
  71         enum AVPixelFormat best= AV_PIX_FMT_NONE;
  72
  73         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
  74             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
  75         }
  76         for (; *p != AV_PIX_FMT_NONE; p++) {
  77             best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
  78             if (*p == target)
  79                 break;
  80         }
  81         if (*p == AV_PIX_FMT_NONE) {
  82             if (target != AV_PIX_FMT_NONE)
  83                 av_log(NULL, AV_LOG_WARNING,
  84                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
  85                        av_get_pix_fmt_name(target),
  86                        codec->name,
  87                        av_get_pix_fmt_name(best));
  88             return best;
  89         }
  90     }
  91     return target;
  92 }
  93
  94 static char *choose_pix_fmts(OutputFilter *ofilter)
  95 {
  96     OutputStream *ost = ofilter->ost;
  97     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
  98     if (strict_dict)
  99         // used by choose_pixel_fmt() and below
 100         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
 101
 102      if (ost->keep_pix_fmt) {
 103         avfilter_graph_set_auto_convert(ofilter->graph->graph,
 104                                             AVFILTER_AUTO_CONVERT_NONE);
 105         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 106             return NULL;
 107         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 108     }
 109     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 110         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 111     } else if (ost->enc && ost->enc->pix_fmts) {
 112         const enum AVPixelFormat *p;
 113         AVIOContext *s = NULL;
 114         uint8_t *ret;
 115         int len;
 116
 117         if (avio_open_dyn_buf(&s) < 0)
 118             exit_program(1);
 119
 120         p = ost->enc->pix_fmts;
 121         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
 122             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
 123         }
 124
 125         for (; *p != AV_PIX_FMT_NONE; p++) {
 126             const char *name = av_get_pix_fmt_name(*p);
 127             avio_printf(s, "%s|", name);
 128         }
 129         len = avio_close_dyn_buf(s, &ret);
 130         ret[len - 1] = 0;
 131         return ret;
 132     } else
 133         return NULL;
 134 }
 135
 136 /* Define a function for building a string containing a list of
 137  * allowed formats. */
 138 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 139 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 140 {                                                                              \
 141     if (ofilter->var != none) {                                                \
 142         get_name(ofilter->var);                                                \
 143         return av_strdup(name);                                                \
 144     } else if (ofilter->supported_list) {                                      \
 145         const type *p;                                                         \
 146         AVIOContext *s = NULL;                                                 \
 147         uint8_t *ret;                                                          \
 148         int len;                                                               \
 149                                                                                \
 150         if (avio_open_dyn_buf(&s) < 0)                                         \
 151             exit_program(1);                                                           \
 152                                                                                \
 153         for (p = ofilter->supported_list; *p != none; p++) {                   \
 154             get_name(*p);                                                      \
 155             avio_printf(s, "%s|", name);                                       \
 156         }                                                                      \
 157         len = avio_close_dyn_buf(s, &ret);                                     \
 158         ret[len - 1] = 0;                                                      \
 159         return ret;                                                            \
 160     } else                                                                     \
 161         return NULL;                                                           \
 162 }
 163
 164 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 165 //                  GET_PIX_FMT_NAME)
 166
 167 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 168                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 169
 170 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 171                   GET_SAMPLE_RATE_NAME)
 172
 173 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 174                   GET_CH_LAYOUT_NAME)
 175
 176 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 177 {
 178     FilterGraph *fg = av_mallocz(sizeof(*fg));
 179
 180     if (!fg)
 181         exit_program(1);
 182     fg->index = nb_filtergraphs;
 183
 184     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 185     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 186         exit_program(1);
 187     fg->outputs[0]->ost   = ost;
 188     fg->outputs[0]->graph = fg;
 189     fg->outputs[0]->format = -1;
 190
 191     ost->filter = fg->outputs[0];
 192
 193     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 194     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 195         exit_program(1);
 196     fg->inputs[0]->ist   = ist;
 197     fg->inputs[0]->graph = fg;
 198     fg->inputs[0]->format = -1;
 199
 200     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 201     if (!fg->inputs[0]->frame_queue)
 202         exit_program(1);
 203
 204     GROW_ARRAY(ist->filters, ist->nb_filters);
 205     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 206
 207     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 208     filtergraphs[nb_filtergraphs - 1] = fg;
 209
 210     return 0;
 211 }
 212
 213 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 214 {
 215     AVFilterContext *ctx = inout->filter_ctx;
 216     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 217     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 218     AVIOContext *pb;
 219     uint8_t *res = NULL;
 220
 221     if (avio_open_dyn_buf(&pb) < 0)
 222         exit_program(1);
 223
 224     avio_printf(pb, "%s", ctx->filter->name);
 225     if (nb_pads > 1)
 226         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 227     avio_w8(pb, 0);
 228     avio_close_dyn_buf(pb, &res);
 229     return res;
 230 }
 231
 232 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 233 {
 234     InputStream *ist = NULL;
 235     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 236     int i;
 237
 238     // TODO: support other filter types
 239     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 240         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 241                "currently.\n");
 242         exit_program(1);
 243     }
 244
 245     if (in->name) {
 246         AVFormatContext *s;
 247         AVStream       *st = NULL;
 248         char *p;
 249         int file_idx = strtol(in->name, &p, 0);
 250
 251         if (file_idx < 0 || file_idx >= nb_input_files) {
 252             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 253                    file_idx, fg->graph_desc);
 254             exit_program(1);
 255         }
 256         s = input_files[file_idx]->ctx;
 257
 258         for (i = 0; i < s->nb_streams; i++) {
 259             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 260             if (stream_type != type &&
 261                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 262                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 263                 continue;
 264             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 265                 st = s->streams[i];
 266                 break;
 267             }
 268         }
 269         if (!st) {
 270             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 271                    "matches no streams.\n", p, fg->graph_desc);
 272             exit_program(1);
 273         }
 274         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 275         if (ist->user_set_discard == AVDISCARD_ALL) {
 276             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 277                    "matches a disabled input stream.\n", p, fg->graph_desc);
 278             exit_program(1);
 279         }
 280     } else {
 281         /* find the first unused stream of corresponding type */
 282         for (i = 0; i < nb_input_streams; i++) {
 283             ist = input_streams[i];
 284             if (ist->user_set_discard == AVDISCARD_ALL)
 285                 continue;
 286             if (ist->dec_ctx->codec_type == type && ist->discard)
 287                 break;
 288         }
 289         if (i == nb_input_streams) {
 290             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 291                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 292                    in->filter_ctx->name);
 293             exit_program(1);
 294         }
 295     }
 296     av_assert0(ist);
 297
 298     ist->discard         = 0;
 299     ist->decoding_needed |= DECODING_FOR_FILTER;
 300     ist->st->discard = AVDISCARD_NONE;
 301
 302     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 303     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 304         exit_program(1);
 305     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 306     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 307     fg->inputs[fg->nb_inputs - 1]->format = -1;
 308     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 309     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 310
 311     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 312     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 313         exit_program(1);
 314
 315     GROW_ARRAY(ist->filters, ist->nb_filters);
 316     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 317 }
 318
 319 int init_complex_filtergraph(FilterGraph *fg)
 320 {
 321     AVFilterInOut *inputs, *outputs, *cur;
 322     AVFilterGraph *graph;
 323     int ret = 0;
 324
 325     /* this graph is only used for determining the kinds of inputs
 326      * and outputs we have, and is discarded on exit from this function */
 327     graph = avfilter_graph_alloc();
 328     if (!graph)
 329         return AVERROR(ENOMEM);
 330     graph->nb_threads = 1;
 331
 332     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 333     if (ret < 0)
 334         goto fail;
 335
 336     for (cur = inputs; cur; cur = cur->next)
 337         init_input_filter(fg, cur);
 338
 339     for (cur = outputs; cur;) {
 340         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 341         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 342         if (!fg->outputs[fg->nb_outputs - 1])
 343             exit_program(1);
 344
 345         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 346         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 347         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 348                                                                          cur->pad_idx);
 349         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 350         cur = cur->next;
 351         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 352     }
 353
 354 fail:
 355     avfilter_inout_free(&inputs);
 356     avfilter_graph_free(&graph);
 357     return ret;
 358 }
 359
 360 static int insert_trim(int64_t start_time, int64_t duration,
 361                        AVFilterContext **last_filter, int *pad_idx,
 362                        const char *filter_name)
 363 {
 364     AVFilterGraph *graph = (*last_filter)->graph;
 365     AVFilterContext *ctx;
 366     const AVFilter *trim;
 367     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 368     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 369     int ret = 0;
 370
 371     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 372         return 0;
 373
 374     trim = avfilter_get_by_name(name);
 375     if (!trim) {
 376         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 377                "recording time.\n", name);
 378         return AVERROR_FILTER_NOT_FOUND;
 379     }
 380
 381     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 382     if (!ctx)
 383         return AVERROR(ENOMEM);
 384
 385     if (duration != INT64_MAX) {
 386         ret = av_opt_set_int(ctx, "durationi", duration,
 387                                 AV_OPT_SEARCH_CHILDREN);
 388     }
 389     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 390         ret = av_opt_set_int(ctx, "starti", start_time,
 391                                 AV_OPT_SEARCH_CHILDREN);
 392     }
 393     if (ret < 0) {
 394         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 395         return ret;
 396     }
 397
 398     ret = avfilter_init_str(ctx, NULL);
 399     if (ret < 0)
 400         return ret;
 401
 402     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 403     if (ret < 0)
 404         return ret;
 405
 406     *last_filter = ctx;
 407     *pad_idx     = 0;
 408     return 0;
 409 }
 410
 411 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 412                          const char *filter_name, const char *args)
 413 {
 414     AVFilterGraph *graph = (*last_filter)->graph;
 415     AVFilterContext *ctx;
 416     int ret;
 417
 418     ret = avfilter_graph_create_filter(&ctx,
 419                                        avfilter_get_by_name(filter_name),
 420                                        filter_name, args, NULL, graph);
 421     if (ret < 0)
 422         return ret;
 423
 424     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 425     if (ret < 0)
 426         return ret;
 427
 428     *last_filter = ctx;
 429     *pad_idx     = 0;
 430     return 0;
 431 }
 432
 433 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 434 {
 435     char *pix_fmts;
 436     OutputStream *ost = ofilter->ost;
 437     OutputFile    *of = output_files[ost->file_index];
 438     AVFilterContext *last_filter = out->filter_ctx;
 439     int pad_idx = out->pad_idx;
 440     int ret;
 441     char name[255];
 442
 443     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 444     ret = avfilter_graph_create_filter(&ofilter->filter,
 445                                        avfilter_get_by_name("buffersink"),
 446                                        name, NULL, NULL, fg->graph);
 447
 448     if (ret < 0)
 449         return ret;
 450
 451     if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
 452         char args[255];
 453         AVFilterContext *filter;
 454         AVDictionaryEntry *e = NULL;
 455
 456         snprintf(args, sizeof(args), "%d:%d",
 457                  ofilter->width, ofilter->height);
 458
 459         while ((e = av_dict_get(ost->sws_dict, "", e,
 460                                 AV_DICT_IGNORE_SUFFIX))) {
 461             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 462         }
 463
 464         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 465                  ost->file_index, ost->index);
 466         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 467                                                 name, args, NULL, fg->graph)) < 0)
 468             return ret;
 469         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 470             return ret;
 471
 472         last_filter = filter;
 473         pad_idx = 0;
 474     }
 475
 476     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 477         AVFilterContext *filter;
 478         snprintf(name, sizeof(name), "format_out_%d_%d",
 479                  ost->file_index, ost->index);
 480         ret = avfilter_graph_create_filter(&filter,
 481                                            avfilter_get_by_name("format"),
 482                                            "format", pix_fmts, NULL, fg->graph);
 483         av_freep(&pix_fmts);
 484         if (ret < 0)
 485             return ret;
 486         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 487             return ret;
 488
 489         last_filter = filter;
 490         pad_idx     = 0;
 491     }
 492
 493     if (ost->frame_rate.num && 0) {
 494         AVFilterContext *fps;
 495         char args[255];
 496
 497         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 498                  ost->frame_rate.den);
 499         snprintf(name, sizeof(name), "fps_out_%d_%d",
 500                  ost->file_index, ost->index);
 501         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 502                                            name, args, NULL, fg->graph);
 503         if (ret < 0)
 504             return ret;
 505
 506         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 507         if (ret < 0)
 508             return ret;
 509         last_filter = fps;
 510         pad_idx = 0;
 511     }
 512
 513     snprintf(name, sizeof(name), "trim_out_%d_%d",
 514              ost->file_index, ost->index);
 515     ret = insert_trim(of->start_time, of->recording_time,
 516                       &last_filter, &pad_idx, name);
 517     if (ret < 0)
 518         return ret;
 519
 520
 521     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 522         return ret;
 523
 524     return 0;
 525 }
 526
 527 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 528 {
 529     OutputStream *ost = ofilter->ost;
 530     OutputFile    *of = output_files[ost->file_index];
 531     AVCodecContext *codec  = ost->enc_ctx;
 532     AVFilterContext *last_filter = out->filter_ctx;
 533     int pad_idx = out->pad_idx;
 534     char *sample_fmts, *sample_rates, *channel_layouts;
 535     char name[255];
 536     int ret;
 537
 538     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 539     ret = avfilter_graph_create_filter(&ofilter->filter,
 540                                        avfilter_get_by_name("abuffersink"),
 541                                        name, NULL, NULL, fg->graph);
 542     if (ret < 0)
 543         return ret;
 544     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 545         return ret;
 546
 547 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 548     AVFilterContext *filt_ctx;                                              \
 549                                                                             \
 550     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 551            "similarly to -af " filter_name "=%s.\n", arg);                  \
 552                                                                             \
 553     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 554                                        avfilter_get_by_name(filter_name),   \
 555                                        filter_name, arg, NULL, fg->graph);  \
 556     if (ret < 0)                                                            \
 557         return ret;                                                         \
 558                                                                             \
 559     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 560     if (ret < 0)                                                            \
 561         return ret;                                                         \
 562                                                                             \
 563     last_filter = filt_ctx;                                                 \
 564     pad_idx = 0;                                                            \
 565 } while (0)
 566     if (ost->audio_channels_mapped) {
 567         int i;
 568         AVBPrint pan_buf;
 569         av_bprint_init(&pan_buf, 256, 8192);
 570         av_bprintf(&pan_buf, "0x%"PRIx64,
 571                    av_get_default_channel_layout(ost->audio_channels_mapped));
 572         for (i = 0; i < ost->audio_channels_mapped; i++)
 573             if (ost->audio_channels_map[i] != -1)
 574                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 575
 576         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 577         av_bprint_finalize(&pan_buf, NULL);
 578     }
 579
 580     if (codec->channels && !codec->channel_layout)
 581         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 582
 583     sample_fmts     = choose_sample_fmts(ofilter);
 584     sample_rates    = choose_sample_rates(ofilter);
 585     channel_layouts = choose_channel_layouts(ofilter);
 586     if (sample_fmts || sample_rates || channel_layouts) {
 587         AVFilterContext *format;
 588         char args[256];
 589         args[0] = 0;
 590
 591         if (sample_fmts)
 592             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 593                             sample_fmts);
 594         if (sample_rates)
 595             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 596                             sample_rates);
 597         if (channel_layouts)
 598             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 599                             channel_layouts);
 600
 601         av_freep(&sample_fmts);
 602         av_freep(&sample_rates);
 603         av_freep(&channel_layouts);
 604
 605         snprintf(name, sizeof(name), "format_out_%d_%d",
 606                  ost->file_index, ost->index);
 607         ret = avfilter_graph_create_filter(&format,
 608                                            avfilter_get_by_name("aformat"),
 609                                            name, args, NULL, fg->graph);
 610         if (ret < 0)
 611             return ret;
 612
 613         ret = avfilter_link(last_filter, pad_idx, format, 0);
 614         if (ret < 0)
 615             return ret;
 616
 617         last_filter = format;
 618         pad_idx = 0;
 619     }
 620
 621     if (ost->apad && of->shortest) {
 622         char args[256];
 623         int i;
 624
 625         for (i=0; i<of->ctx->nb_streams; i++)
 626             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 627                 break;
 628
 629         if (i<of->ctx->nb_streams) {
 630             snprintf(args, sizeof(args), "%s", ost->apad);
 631             AUTO_INSERT_FILTER("-apad", "apad", args);
 632         }
 633     }
 634
 635     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 636              ost->file_index, ost->index);
 637     ret = insert_trim(of->start_time, of->recording_time,
 638                       &last_filter, &pad_idx, name);
 639     if (ret < 0)
 640         return ret;
 641
 642     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 643         return ret;
 644
 645     return 0;
 646 }
 647
 648 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
 649                                    AVFilterInOut *out)
 650 {
 651     if (!ofilter->ost) {
 652         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 653         exit_program(1);
 654     }
 655
 656     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 657     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 658     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 659     default: av_assert0(0);
 660     }
 661 }
 662
 663 void check_filter_outputs(void)
 664 {
 665     int i;
 666     for (i = 0; i < nb_filtergraphs; i++) {
 667         int n;
 668         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 669             OutputFilter *output = filtergraphs[i]->outputs[n];
 670             if (!output->ost) {
 671                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 672                 exit_program(1);
 673             }
 674         }
 675     }
 676 }
 677
 678 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 679 {
 680     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 681     int i, w, h;
 682
 683     /* Compute the size of the canvas for the subtitles stream.
 684        If the subtitles codecpar has set a size, use it. Otherwise use the
 685        maximum dimensions of the video streams in the same file. */
 686     w = ifilter->width;
 687     h = ifilter->height;
 688     if (!(w && h)) {
 689         for (i = 0; i < avf->nb_streams; i++) {
 690             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 691                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 692                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 693             }
 694         }
 695         if (!(w && h)) {
 696             w = FFMAX(w, 720);
 697             h = FFMAX(h, 576);
 698         }
 699         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 700     }
 701     ist->sub2video.w = ifilter->width  = w;
 702     ist->sub2video.h = ifilter->height = h;
 703
 704     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 705     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 706
 707     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 708        palettes for all rectangles are identical or compatible */
 709     ifilter->format = AV_PIX_FMT_RGB32;
 710
 711     ist->sub2video.frame = av_frame_alloc();
 712     if (!ist->sub2video.frame)
 713         return AVERROR(ENOMEM);
 714     ist->sub2video.last_pts = INT64_MIN;
 715     ist->sub2video.end_pts  = INT64_MIN;
 716
 717     /* sub2video structure has been (re-)initialized.
 718        Mark it as such so that the system will be
 719        initialized with the first received heartbeat. */
 720     ist->sub2video.initialize = 1;
 721
 722     return 0;
 723 }
 724
 725 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 726                                         AVFilterInOut *in)
 727 {
 728     AVFilterContext *last_filter;
 729     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 730     InputStream *ist = ifilter->ist;
 731     InputFile     *f = input_files[ist->file_index];
 732     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 733                                          ist->st->time_base;
 734     AVRational fr = ist->framerate;
 735     AVRational sar;
 736     AVBPrint args;
 737     char name[255];
 738     int ret, pad_idx = 0;
 739     int64_t tsoffset = 0;
 740     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 741
 742     if (!par)
 743         return AVERROR(ENOMEM);
 744     memset(par, 0, sizeof(*par));
 745     par->format = AV_PIX_FMT_NONE;
 746
 747     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 748         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 749         ret = AVERROR(EINVAL);
 750         goto fail;
 751     }
 752
 753     if (!fr.num)
 754         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 755
 756     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 757         ret = sub2video_prepare(ist, ifilter);
 758         if (ret < 0)
 759             goto fail;
 760     }
 761
 762     sar = ifilter->sample_aspect_ratio;
 763     if(!sar.den)
 764         sar = (AVRational){0,1};
 765     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 766     av_bprintf(&args,
 767              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 768              "pixel_aspect=%d/%d",
 769              ifilter->width, ifilter->height, ifilter->format,
 770              tb.num, tb.den, sar.num, sar.den);
 771     if (fr.num && fr.den)
 772         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 773     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 774              ist->file_index, ist->st->index);
 775
 776
 777     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 778                                             args.str, NULL, fg->graph)) < 0)
 779         goto fail;
 780     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 781     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 782     if (ret < 0)
 783         goto fail;
 784     av_freep(&par);
 785     last_filter = ifilter->filter;
 786
 787     if (ist->autorotate) {
 788         double theta = get_rotation(ist->st);
 789
 790         if (fabs(theta - 90) < 1.0) {
 791             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 792         } else if (fabs(theta - 180) < 1.0) {
 793             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 794             if (ret < 0)
 795                 return ret;
 796             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 797         } else if (fabs(theta - 270) < 1.0) {
 798             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 799         } else if (fabs(theta) > 1.0) {
 800             char rotate_buf[64];
 801             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 802             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 803         }
 804         if (ret < 0)
 805             return ret;
 806     }
 807
 808     if (do_deinterlace) {
 809         AVFilterContext *yadif;
 810
 811         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 812                  ist->file_index, ist->st->index);
 813         if ((ret = avfilter_graph_create_filter(&yadif,
 814                                                 avfilter_get_by_name("yadif"),
 815                                                 name, "", NULL,
 816                                                 fg->graph)) < 0)
 817             return ret;
 818
 819         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 820             return ret;
 821
 822         last_filter = yadif;
 823     }
 824
 825     snprintf(name, sizeof(name), "trim_in_%d_%d",
 826              ist->file_index, ist->st->index);
 827     if (copy_ts) {
 828         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 829         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 830             tsoffset += f->ctx->start_time;
 831     }
 832     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 833                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 834                       &last_filter, &pad_idx, name);
 835     if (ret < 0)
 836         return ret;
 837
 838     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 839         return ret;
 840     return 0;
 841 fail:
 842     av_freep(&par);
 843
 844     return ret;
 845 }
 846
 847 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 848                                         AVFilterInOut *in)
 849 {
 850     AVFilterContext *last_filter;
 851     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 852     InputStream *ist = ifilter->ist;
 853     InputFile     *f = input_files[ist->file_index];
 854     AVBPrint args;
 855     char name[255];
 856     int ret, pad_idx = 0;
 857     int64_t tsoffset = 0;
 858
 859     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 860         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 861         return AVERROR(EINVAL);
 862     }
 863
 864     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 865     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 866              1, ifilter->sample_rate,
 867              ifilter->sample_rate,
 868              av_get_sample_fmt_name(ifilter->format));
 869     if (ifilter->channel_layout)
 870         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 871                    ifilter->channel_layout);
 872     else
 873         av_bprintf(&args, ":channels=%d", ifilter->channels);
 874     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 875              ist->file_index, ist->st->index);
 876
 877     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 878                                             name, args.str, NULL,
 879                                             fg->graph)) < 0)
 880         return ret;
 881     last_filter = ifilter->filter;
 882
 883 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 884     AVFilterContext *filt_ctx;                                              \
 885                                                                             \
 886     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 887            "similarly to -af " filter_name "=%s.\n", arg);                  \
 888                                                                             \
 889     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 890                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 891     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 892                                        avfilter_get_by_name(filter_name),   \
 893                                        name, arg, NULL, fg->graph);         \
 894     if (ret < 0)                                                            \
 895         return ret;                                                         \
 896                                                                             \
 897     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 898     if (ret < 0)                                                            \
 899         return ret;                                                         \
 900                                                                             \
 901     last_filter = filt_ctx;                                                 \
 902 } while (0)
 903
 904     if (audio_sync_method > 0) {
 905         char args[256] = {0};
 906
 907         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 908         if (audio_drift_threshold != 0.1)
 909             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 910         if (!fg->reconfiguration)
 911             av_strlcatf(args, sizeof(args), ":first_pts=0");
 912         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 913     }
 914
 915 //     if (ost->audio_channels_mapped) {
 916 //         int i;
 917 //         AVBPrint pan_buf;
 918 //         av_bprint_init(&pan_buf, 256, 8192);
 919 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 920 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 921 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 922 //             if (ost->audio_channels_map[i] != -1)
 923 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 924 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 925 //         av_bprint_finalize(&pan_buf, NULL);
 926 //     }
 927
 928     if (audio_volume != 256) {
 929         char args[256];
 930
 931         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 932                "audio filter instead.\n");
 933
 934         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 935         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 936     }
 937
 938     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 939              ist->file_index, ist->st->index);
 940     if (copy_ts) {
 941         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 942         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 943             tsoffset += f->ctx->start_time;
 944     }
 945     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 946                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 947                       &last_filter, &pad_idx, name);
 948     if (ret < 0)
 949         return ret;
 950
 951     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 952         return ret;
 953
 954     return 0;
 955 }
 956
 957 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 958                                   AVFilterInOut *in)
 959 {
 960     if (!ifilter->ist->dec) {
 961         av_log(NULL, AV_LOG_ERROR,
 962                "No decoder for stream #%d:%d, filtering impossible\n",
 963                ifilter->ist->file_index, ifilter->ist->st->index);
 964         return AVERROR_DECODER_NOT_FOUND;
 965     }
 966     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 967     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 968     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 969     default: av_assert0(0);
 970     }
 971 }
 972
 973 static void cleanup_filtergraph(FilterGraph *fg)
 974 {
 975     int i;
 976     for (i = 0; i < fg->nb_outputs; i++)
 977         fg->outputs[i]->filter = (AVFilterContext *)NULL;
 978     for (i = 0; i < fg->nb_inputs; i++)
 979         fg->inputs[i]->filter = (AVFilterContext *)NULL;
 980     avfilter_graph_free(&fg->graph);
 981 }
 982
 983 int configure_filtergraph(FilterGraph *fg)
 984 {
 985     AVFilterInOut *inputs, *outputs, *cur;
 986     int ret, i, simple = filtergraph_is_simple(fg);
 987     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
 988                                       fg->graph_desc;
 989
 990     cleanup_filtergraph(fg);
 991     if (!(fg->graph = avfilter_graph_alloc()))
 992         return AVERROR(ENOMEM);
 993
 994     if (simple) {
 995         OutputStream *ost = fg->outputs[0]->ost;
 996         char args[512];
 997         AVDictionaryEntry *e = NULL;
 998
 999         fg->graph->nb_threads = filter_nbthreads;
1000
1001         args[0] = 0;
1002         while ((e = av_dict_get(ost->sws_dict, "", e,
1003                                 AV_DICT_IGNORE_SUFFIX))) {
1004             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1005         }
1006         if (strlen(args))
1007             args[strlen(args)-1] = 0;
1008         fg->graph->scale_sws_opts = av_strdup(args);
1009
1010         args[0] = 0;
1011         while ((e = av_dict_get(ost->swr_opts, "", e,
1012                                 AV_DICT_IGNORE_SUFFIX))) {
1013             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1014         }
1015         if (strlen(args))
1016             args[strlen(args)-1] = 0;
1017         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1018
1019         args[0] = '\0';
1020         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1021                                 AV_DICT_IGNORE_SUFFIX))) {
1022             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1023         }
1024         if (strlen(args))
1025             args[strlen(args) - 1] = '\0';
1026
1027         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1028         if (e)
1029             av_opt_set(fg->graph, "threads", e->value, 0);
1030     } else {
1031         fg->graph->nb_threads = filter_complex_nbthreads;
1032     }
1033
1034     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1035         goto fail;
1036
1037     ret = hw_device_setup_for_filter(fg);
1038     if (ret < 0)
1039         goto fail;
1040
1041     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1042         const char *num_inputs;
1043         const char *num_outputs;
1044         if (!outputs) {
1045             num_outputs = "0";
1046         } else if (outputs->next) {
1047             num_outputs = ">1";
1048         } else {
1049             num_outputs = "1";
1050         }
1051         if (!inputs) {
1052             num_inputs = "0";
1053         } else if (inputs->next) {
1054             num_inputs = ">1";
1055         } else {
1056             num_inputs = "1";
1057         }
1058         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1059                "to have exactly 1 input and 1 output."
1060                " However, it had %s input(s) and %s output(s)."
1061                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1062                graph_desc, num_inputs, num_outputs);
1063         ret = AVERROR(EINVAL);
1064         goto fail;
1065     }
1066
1067     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1068         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1069             avfilter_inout_free(&inputs);
1070             avfilter_inout_free(&outputs);
1071             goto fail;
1072         }
1073     avfilter_inout_free(&inputs);
1074
1075     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1076         configure_output_filter(fg, fg->outputs[i], cur);
1077     avfilter_inout_free(&outputs);
1078
1079     if (!auto_conversion_filters)
1080         avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1081     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1082         goto fail;
1083
1084     /* limit the lists of allowed formats to the ones selected, to
1085      * make sure they stay the same if the filtergraph is reconfigured later */
1086     for (i = 0; i < fg->nb_outputs; i++) {
1087         OutputFilter *ofilter = fg->outputs[i];
1088         AVFilterContext *sink = ofilter->filter;
1089
1090         ofilter->format = av_buffersink_get_format(sink);
1091
1092         ofilter->width  = av_buffersink_get_w(sink);
1093         ofilter->height = av_buffersink_get_h(sink);
1094
1095         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1096         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1097     }
1098
1099     fg->reconfiguration = 1;
1100
1101     for (i = 0; i < fg->nb_outputs; i++) {
1102         OutputStream *ost = fg->outputs[i]->ost;
1103         if (!ost->enc) {
1104             /* identical to the same check in ffmpeg.c, needed because
1105                complex filter graphs are initialized earlier */
1106             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1107                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1108             ret = AVERROR(EINVAL);
1109             goto fail;
1110         }
1111         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1112             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1113             av_buffersink_set_frame_size(ost->filter->filter,
1114                                          ost->enc_ctx->frame_size);
1115     }
1116
1117     for (i = 0; i < fg->nb_inputs; i++) {
1118         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1119             AVFrame *tmp;
1120             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1121             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1122             av_frame_free(&tmp);
1123             if (ret < 0)
1124                 goto fail;
1125         }
1126     }
1127
1128     /* send the EOFs for the finished inputs */
1129     for (i = 0; i < fg->nb_inputs; i++) {
1130         if (fg->inputs[i]->eof) {
1131             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1132             if (ret < 0)
1133                 goto fail;
1134         }
1135     }
1136
1137     /* process queued up subtitle packets */
1138     for (i = 0; i < fg->nb_inputs; i++) {
1139         InputStream *ist = fg->inputs[i]->ist;
1140         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1141             while (av_fifo_size(ist->sub2video.sub_queue)) {
1142                 AVSubtitle tmp;
1143                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1144                 sub2video_update(ist, INT64_MIN, &tmp);
1145                 avsubtitle_free(&tmp);
1146             }
1147         }
1148     }
1149
1150     return 0;
1151
1152 fail:
1153     cleanup_filtergraph(fg);
1154     return ret;
1155 }
1156
1157 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1158 {
1159     av_buffer_unref(&ifilter->hw_frames_ctx);
1160
1161     ifilter->format = frame->format;
1162
1163     ifilter->width               = frame->width;
1164     ifilter->height              = frame->height;
1165     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1166
1167     ifilter->sample_rate         = frame->sample_rate;
1168     ifilter->channels            = frame->channels;
1169     ifilter->channel_layout      = frame->channel_layout;
1170
1171     if (frame->hw_frames_ctx) {
1172         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1173         if (!ifilter->hw_frames_ctx)
1174             return AVERROR(ENOMEM);
1175     }
1176
1177     return 0;
1178 }
1179
1180 int filtergraph_is_simple(FilterGraph *fg)
1181 {
1182     return !fg->graph_desc;
1183 }