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

   1 /*
   2  * ffmpeg filter configuration
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <stdint.h>
  22
  23 #include "ffmpeg.h"
  24
  25 #include "libavfilter/avfilter.h"
  26 #include "libavfilter/buffersink.h"
  27 #include "libavfilter/buffersrc.h"
  28
  29 #include "libavresample/avresample.h"
  30
  31 #include "libavutil/avassert.h"
  32 #include "libavutil/avstring.h"
  33 #include "libavutil/bprint.h"
  34 #include "libavutil/channel_layout.h"
  35 #include "libavutil/display.h"
  36 #include "libavutil/opt.h"
  37 #include "libavutil/pixdesc.h"
  38 #include "libavutil/pixfmt.h"
  39 #include "libavutil/imgutils.h"
  40 #include "libavutil/samplefmt.h"
  41
  42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
  43 {
  44     static const enum AVPixelFormat mjpeg_formats[] =
  45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
  46           AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
  47           AV_PIX_FMT_NONE };
  48     static const enum AVPixelFormat ljpeg_formats[] =
  49         { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
  50           AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
  51           AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
  52           AV_PIX_FMT_NONE};
  53
  54     if (codec_id == AV_CODEC_ID_MJPEG) {
  55         return mjpeg_formats;
  56     } else if (codec_id == AV_CODEC_ID_LJPEG) {
  57         return ljpeg_formats;
  58     } else {
  59         return default_formats;
  60     }
  61 }
  62
  63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
  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= avcodec_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 void choose_sample_fmt(AVStream *st, const AVCodec *codec)
  95 {
  96     if (codec && codec->sample_fmts) {
  97         const enum AVSampleFormat *p = codec->sample_fmts;
  98         for (; *p != -1; p++) {
  99             if (*p == st->codecpar->format)
 100                 break;
 101         }
 102         if (*p == -1) {
 103             const AVCodecDescriptor *desc = avcodec_descriptor_get(codec->id);
 104             if(desc && (desc->props & AV_CODEC_PROP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
 105                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
 106             if(av_get_sample_fmt_name(st->codecpar->format))
 107             av_log(NULL, AV_LOG_WARNING,
 108                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
 109                    av_get_sample_fmt_name(st->codecpar->format),
 110                    codec->name,
 111                    av_get_sample_fmt_name(codec->sample_fmts[0]));
 112             st->codecpar->format = codec->sample_fmts[0];
 113         }
 114     }
 115 }
 116
 117 static char *choose_pix_fmts(OutputFilter *ofilter)
 118 {
 119     OutputStream *ost = ofilter->ost;
 120     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
 121     if (strict_dict)
 122         // used by choose_pixel_fmt() and below
 123         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
 124
 125      if (ost->keep_pix_fmt) {
 126         avfilter_graph_set_auto_convert(ofilter->graph->graph,
 127                                             AVFILTER_AUTO_CONVERT_NONE);
 128         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
 129             return NULL;
 130         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
 131     }
 132     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
 133         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
 134     } else if (ost->enc && ost->enc->pix_fmts) {
 135         const enum AVPixelFormat *p;
 136         AVIOContext *s = NULL;
 137         uint8_t *ret;
 138         int len;
 139
 140         if (avio_open_dyn_buf(&s) < 0)
 141             exit_program(1);
 142
 143         p = ost->enc->pix_fmts;
 144         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
 145             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
 146         }
 147
 148         for (; *p != AV_PIX_FMT_NONE; p++) {
 149             const char *name = av_get_pix_fmt_name(*p);
 150             avio_printf(s, "%s|", name);
 151         }
 152         len = avio_close_dyn_buf(s, &ret);
 153         ret[len - 1] = 0;
 154         return ret;
 155     } else
 156         return NULL;
 157 }
 158
 159 /* Define a function for building a string containing a list of
 160  * allowed formats. */
 161 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
 162 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
 163 {                                                                              \
 164     if (ofilter->var != none) {                                                \
 165         get_name(ofilter->var);                                                \
 166         return av_strdup(name);                                                \
 167     } else if (ofilter->supported_list) {                                      \
 168         const type *p;                                                         \
 169         AVIOContext *s = NULL;                                                 \
 170         uint8_t *ret;                                                          \
 171         int len;                                                               \
 172                                                                                \
 173         if (avio_open_dyn_buf(&s) < 0)                                         \
 174             exit_program(1);                                                           \
 175                                                                                \
 176         for (p = ofilter->supported_list; *p != none; p++) {                   \
 177             get_name(*p);                                                      \
 178             avio_printf(s, "%s|", name);                                       \
 179         }                                                                      \
 180         len = avio_close_dyn_buf(s, &ret);                                     \
 181         ret[len - 1] = 0;                                                      \
 182         return ret;                                                            \
 183     } else                                                                     \
 184         return NULL;                                                           \
 185 }
 186
 187 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
 188 //                  GET_PIX_FMT_NAME)
 189
 190 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
 191                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
 192
 193 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
 194                   GET_SAMPLE_RATE_NAME)
 195
 196 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 197                   GET_CH_LAYOUT_NAME)
 198
 199 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 200 {
 201     FilterGraph *fg = av_mallocz(sizeof(*fg));
 202
 203     if (!fg)
 204         exit_program(1);
 205     fg->index = nb_filtergraphs;
 206
 207     GROW_ARRAY(fg->outputs, fg->nb_outputs);
 208     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
 209         exit_program(1);
 210     fg->outputs[0]->ost   = ost;
 211     fg->outputs[0]->graph = fg;
 212     fg->outputs[0]->format = -1;
 213
 214     ost->filter = fg->outputs[0];
 215
 216     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 217     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
 218         exit_program(1);
 219     fg->inputs[0]->ist   = ist;
 220     fg->inputs[0]->graph = fg;
 221     fg->inputs[0]->format = -1;
 222
 223     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 224     if (!fg->inputs[0]->frame_queue)
 225         exit_program(1);
 226
 227     GROW_ARRAY(ist->filters, ist->nb_filters);
 228     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
 229
 230     GROW_ARRAY(filtergraphs, nb_filtergraphs);
 231     filtergraphs[nb_filtergraphs - 1] = fg;
 232
 233     return 0;
 234 }
 235
 236 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
 237 {
 238     AVFilterContext *ctx = inout->filter_ctx;
 239     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
 240     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
 241     AVIOContext *pb;
 242     uint8_t *res = NULL;
 243
 244     if (avio_open_dyn_buf(&pb) < 0)
 245         exit_program(1);
 246
 247     avio_printf(pb, "%s", ctx->filter->name);
 248     if (nb_pads > 1)
 249         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
 250     avio_w8(pb, 0);
 251     avio_close_dyn_buf(pb, &res);
 252     return res;
 253 }
 254
 255 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 256 {
 257     InputStream *ist = NULL;
 258     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
 259     int i;
 260
 261     // TODO: support other filter types
 262     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
 263         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
 264                "currently.\n");
 265         exit_program(1);
 266     }
 267
 268     if (in->name) {
 269         AVFormatContext *s;
 270         AVStream       *st = NULL;
 271         char *p;
 272         int file_idx = strtol(in->name, &p, 0);
 273
 274         if (file_idx < 0 || file_idx >= nb_input_files) {
 275             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
 276                    file_idx, fg->graph_desc);
 277             exit_program(1);
 278         }
 279         s = input_files[file_idx]->ctx;
 280
 281         for (i = 0; i < s->nb_streams; i++) {
 282             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
 283             if (stream_type != type &&
 284                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
 285                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
 286                 continue;
 287             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
 288                 st = s->streams[i];
 289                 break;
 290             }
 291         }
 292         if (!st) {
 293             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 294                    "matches no streams.\n", p, fg->graph_desc);
 295             exit_program(1);
 296         }
 297         ist = input_streams[input_files[file_idx]->ist_index + st->index];
 298         if (ist->user_set_discard == AVDISCARD_ALL) {
 299             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
 300                    "matches a disabled input stream.\n", p, fg->graph_desc);
 301             exit_program(1);
 302         }
 303     } else {
 304         /* find the first unused stream of corresponding type */
 305         for (i = 0; i < nb_input_streams; i++) {
 306             ist = input_streams[i];
 307             if (ist->user_set_discard == AVDISCARD_ALL)
 308                 continue;
 309             if (ist->dec_ctx->codec_type == type && ist->discard)
 310                 break;
 311         }
 312         if (i == nb_input_streams) {
 313             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
 314                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
 315                    in->filter_ctx->name);
 316             exit_program(1);
 317         }
 318     }
 319     av_assert0(ist);
 320
 321     ist->discard         = 0;
 322     ist->decoding_needed |= DECODING_FOR_FILTER;
 323     ist->st->discard = AVDISCARD_NONE;
 324
 325     GROW_ARRAY(fg->inputs, fg->nb_inputs);
 326     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
 327         exit_program(1);
 328     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
 329     fg->inputs[fg->nb_inputs - 1]->graph = fg;
 330     fg->inputs[fg->nb_inputs - 1]->format = -1;
 331     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
 332     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 333
 334     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
 335     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
 336         exit_program(1);
 337
 338     GROW_ARRAY(ist->filters, ist->nb_filters);
 339     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
 340 }
 341
 342 int init_complex_filtergraph(FilterGraph *fg)
 343 {
 344     AVFilterInOut *inputs, *outputs, *cur;
 345     AVFilterGraph *graph;
 346     int ret = 0;
 347
 348     /* this graph is only used for determining the kinds of inputs
 349      * and outputs we have, and is discarded on exit from this function */
 350     graph = avfilter_graph_alloc();
 351     if (!graph)
 352         return AVERROR(ENOMEM);
 353     graph->nb_threads = 1;
 354
 355     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
 356     if (ret < 0)
 357         goto fail;
 358
 359     for (cur = inputs; cur; cur = cur->next)
 360         init_input_filter(fg, cur);
 361
 362     for (cur = outputs; cur;) {
 363         GROW_ARRAY(fg->outputs, fg->nb_outputs);
 364         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
 365         if (!fg->outputs[fg->nb_outputs - 1])
 366             exit_program(1);
 367
 368         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
 369         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
 370         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
 371                                                                          cur->pad_idx);
 372         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
 373         cur = cur->next;
 374         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
 375     }
 376
 377 fail:
 378     avfilter_inout_free(&inputs);
 379     avfilter_graph_free(&graph);
 380     return ret;
 381 }
 382
 383 static int insert_trim(int64_t start_time, int64_t duration,
 384                        AVFilterContext **last_filter, int *pad_idx,
 385                        const char *filter_name)
 386 {
 387     AVFilterGraph *graph = (*last_filter)->graph;
 388     AVFilterContext *ctx;
 389     const AVFilter *trim;
 390     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
 391     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
 392     int ret = 0;
 393
 394     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
 395         return 0;
 396
 397     trim = avfilter_get_by_name(name);
 398     if (!trim) {
 399         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
 400                "recording time.\n", name);
 401         return AVERROR_FILTER_NOT_FOUND;
 402     }
 403
 404     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
 405     if (!ctx)
 406         return AVERROR(ENOMEM);
 407
 408     if (duration != INT64_MAX) {
 409         ret = av_opt_set_int(ctx, "durationi", duration,
 410                                 AV_OPT_SEARCH_CHILDREN);
 411     }
 412     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
 413         ret = av_opt_set_int(ctx, "starti", start_time,
 414                                 AV_OPT_SEARCH_CHILDREN);
 415     }
 416     if (ret < 0) {
 417         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
 418         return ret;
 419     }
 420
 421     ret = avfilter_init_str(ctx, NULL);
 422     if (ret < 0)
 423         return ret;
 424
 425     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 426     if (ret < 0)
 427         return ret;
 428
 429     *last_filter = ctx;
 430     *pad_idx     = 0;
 431     return 0;
 432 }
 433
 434 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
 435                          const char *filter_name, const char *args)
 436 {
 437     AVFilterGraph *graph = (*last_filter)->graph;
 438     AVFilterContext *ctx;
 439     int ret;
 440
 441     ret = avfilter_graph_create_filter(&ctx,
 442                                        avfilter_get_by_name(filter_name),
 443                                        filter_name, args, NULL, graph);
 444     if (ret < 0)
 445         return ret;
 446
 447     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
 448     if (ret < 0)
 449         return ret;
 450
 451     *last_filter = ctx;
 452     *pad_idx     = 0;
 453     return 0;
 454 }
 455
 456 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 457 {
 458     char *pix_fmts;
 459     OutputStream *ost = ofilter->ost;
 460     OutputFile    *of = output_files[ost->file_index];
 461     AVFilterContext *last_filter = out->filter_ctx;
 462     int pad_idx = out->pad_idx;
 463     int ret;
 464     char name[255];
 465
 466     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 467     ret = avfilter_graph_create_filter(&ofilter->filter,
 468                                        avfilter_get_by_name("buffersink"),
 469                                        name, NULL, NULL, fg->graph);
 470
 471     if (ret < 0)
 472         return ret;
 473
 474     if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
 475         char args[255];
 476         AVFilterContext *filter;
 477         AVDictionaryEntry *e = NULL;
 478
 479         snprintf(args, sizeof(args), "%d:%d",
 480                  ofilter->width, ofilter->height);
 481
 482         while ((e = av_dict_get(ost->sws_dict, "", e,
 483                                 AV_DICT_IGNORE_SUFFIX))) {
 484             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
 485         }
 486
 487         snprintf(name, sizeof(name), "scaler_out_%d_%d",
 488                  ost->file_index, ost->index);
 489         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
 490                                                 name, args, NULL, fg->graph)) < 0)
 491             return ret;
 492         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 493             return ret;
 494
 495         last_filter = filter;
 496         pad_idx = 0;
 497     }
 498
 499     if ((pix_fmts = choose_pix_fmts(ofilter))) {
 500         AVFilterContext *filter;
 501         snprintf(name, sizeof(name), "format_out_%d_%d",
 502                  ost->file_index, ost->index);
 503         ret = avfilter_graph_create_filter(&filter,
 504                                            avfilter_get_by_name("format"),
 505                                            "format", pix_fmts, NULL, fg->graph);
 506         av_freep(&pix_fmts);
 507         if (ret < 0)
 508             return ret;
 509         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
 510             return ret;
 511
 512         last_filter = filter;
 513         pad_idx     = 0;
 514     }
 515
 516     if (ost->frame_rate.num && 0) {
 517         AVFilterContext *fps;
 518         char args[255];
 519
 520         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
 521                  ost->frame_rate.den);
 522         snprintf(name, sizeof(name), "fps_out_%d_%d",
 523                  ost->file_index, ost->index);
 524         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
 525                                            name, args, NULL, fg->graph);
 526         if (ret < 0)
 527             return ret;
 528
 529         ret = avfilter_link(last_filter, pad_idx, fps, 0);
 530         if (ret < 0)
 531             return ret;
 532         last_filter = fps;
 533         pad_idx = 0;
 534     }
 535
 536     snprintf(name, sizeof(name), "trim_out_%d_%d",
 537              ost->file_index, ost->index);
 538     ret = insert_trim(of->start_time, of->recording_time,
 539                       &last_filter, &pad_idx, name);
 540     if (ret < 0)
 541         return ret;
 542
 543
 544     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 545         return ret;
 546
 547     return 0;
 548 }
 549
 550 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 551 {
 552     OutputStream *ost = ofilter->ost;
 553     OutputFile    *of = output_files[ost->file_index];
 554     AVCodecContext *codec  = ost->enc_ctx;
 555     AVFilterContext *last_filter = out->filter_ctx;
 556     int pad_idx = out->pad_idx;
 557     char *sample_fmts, *sample_rates, *channel_layouts;
 558     char name[255];
 559     int ret;
 560
 561     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
 562     ret = avfilter_graph_create_filter(&ofilter->filter,
 563                                        avfilter_get_by_name("abuffersink"),
 564                                        name, NULL, NULL, fg->graph);
 565     if (ret < 0)
 566         return ret;
 567     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
 568         return ret;
 569
 570 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
 571     AVFilterContext *filt_ctx;                                              \
 572                                                                             \
 573     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 574            "similarly to -af " filter_name "=%s.\n", arg);                  \
 575                                                                             \
 576     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 577                                        avfilter_get_by_name(filter_name),   \
 578                                        filter_name, arg, NULL, fg->graph);  \
 579     if (ret < 0)                                                            \
 580         return ret;                                                         \
 581                                                                             \
 582     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
 583     if (ret < 0)                                                            \
 584         return ret;                                                         \
 585                                                                             \
 586     last_filter = filt_ctx;                                                 \
 587     pad_idx = 0;                                                            \
 588 } while (0)
 589     if (ost->audio_channels_mapped) {
 590         int i;
 591         AVBPrint pan_buf;
 592         av_bprint_init(&pan_buf, 256, 8192);
 593         av_bprintf(&pan_buf, "0x%"PRIx64,
 594                    av_get_default_channel_layout(ost->audio_channels_mapped));
 595         for (i = 0; i < ost->audio_channels_mapped; i++)
 596             if (ost->audio_channels_map[i] != -1)
 597                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
 598
 599         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
 600         av_bprint_finalize(&pan_buf, NULL);
 601     }
 602
 603     if (codec->channels && !codec->channel_layout)
 604         codec->channel_layout = av_get_default_channel_layout(codec->channels);
 605
 606     sample_fmts     = choose_sample_fmts(ofilter);
 607     sample_rates    = choose_sample_rates(ofilter);
 608     channel_layouts = choose_channel_layouts(ofilter);
 609     if (sample_fmts || sample_rates || channel_layouts) {
 610         AVFilterContext *format;
 611         char args[256];
 612         args[0] = 0;
 613
 614         if (sample_fmts)
 615             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
 616                             sample_fmts);
 617         if (sample_rates)
 618             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
 619                             sample_rates);
 620         if (channel_layouts)
 621             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
 622                             channel_layouts);
 623
 624         av_freep(&sample_fmts);
 625         av_freep(&sample_rates);
 626         av_freep(&channel_layouts);
 627
 628         snprintf(name, sizeof(name), "format_out_%d_%d",
 629                  ost->file_index, ost->index);
 630         ret = avfilter_graph_create_filter(&format,
 631                                            avfilter_get_by_name("aformat"),
 632                                            name, args, NULL, fg->graph);
 633         if (ret < 0)
 634             return ret;
 635
 636         ret = avfilter_link(last_filter, pad_idx, format, 0);
 637         if (ret < 0)
 638             return ret;
 639
 640         last_filter = format;
 641         pad_idx = 0;
 642     }
 643
 644     if (audio_volume != 256 && 0) {
 645         char args[256];
 646
 647         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 648         AUTO_INSERT_FILTER("-vol", "volume", args);
 649     }
 650
 651     if (ost->apad && of->shortest) {
 652         char args[256];
 653         int i;
 654
 655         for (i=0; i<of->ctx->nb_streams; i++)
 656             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
 657                 break;
 658
 659         if (i<of->ctx->nb_streams) {
 660             snprintf(args, sizeof(args), "%s", ost->apad);
 661             AUTO_INSERT_FILTER("-apad", "apad", args);
 662         }
 663     }
 664
 665     snprintf(name, sizeof(name), "trim for output stream %d:%d",
 666              ost->file_index, ost->index);
 667     ret = insert_trim(of->start_time, of->recording_time,
 668                       &last_filter, &pad_idx, name);
 669     if (ret < 0)
 670         return ret;
 671
 672     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
 673         return ret;
 674
 675     return 0;
 676 }
 677
 678 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 679 {
 680     if (!ofilter->ost) {
 681         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
 682         exit_program(1);
 683     }
 684
 685     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
 686     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
 687     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
 688     default: av_assert0(0);
 689     }
 690 }
 691
 692 void check_filter_outputs(void)
 693 {
 694     int i;
 695     for (i = 0; i < nb_filtergraphs; i++) {
 696         int n;
 697         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
 698             OutputFilter *output = filtergraphs[i]->outputs[n];
 699             if (!output->ost) {
 700                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
 701                 exit_program(1);
 702             }
 703         }
 704     }
 705 }
 706
 707 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
 708 {
 709     AVFormatContext *avf = input_files[ist->file_index]->ctx;
 710     int i, w, h;
 711
 712     /* Compute the size of the canvas for the subtitles stream.
 713        If the subtitles codecpar has set a size, use it. Otherwise use the
 714        maximum dimensions of the video streams in the same file. */
 715     w = ifilter->width;
 716     h = ifilter->height;
 717     if (!(w && h)) {
 718         for (i = 0; i < avf->nb_streams; i++) {
 719             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 720                 w = FFMAX(w, avf->streams[i]->codecpar->width);
 721                 h = FFMAX(h, avf->streams[i]->codecpar->height);
 722             }
 723         }
 724         if (!(w && h)) {
 725             w = FFMAX(w, 720);
 726             h = FFMAX(h, 576);
 727         }
 728         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
 729     }
 730     ist->sub2video.w = ifilter->width  = w;
 731     ist->sub2video.h = ifilter->height = h;
 732
 733     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
 734     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
 735
 736     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
 737        palettes for all rectangles are identical or compatible */
 738     ifilter->format = AV_PIX_FMT_RGB32;
 739
 740     ist->sub2video.frame = av_frame_alloc();
 741     if (!ist->sub2video.frame)
 742         return AVERROR(ENOMEM);
 743     ist->sub2video.last_pts = INT64_MIN;
 744     ist->sub2video.end_pts  = INT64_MIN;
 745
 746     /* sub2video structure has been (re-)initialized.
 747        Mark it as such so that the system will be
 748        initialized with the first received heartbeat. */
 749     ist->sub2video.initialize = 1;
 750
 751     return 0;
 752 }
 753
 754 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
 755                                         AVFilterInOut *in)
 756 {
 757     AVFilterContext *last_filter;
 758     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
 759     InputStream *ist = ifilter->ist;
 760     InputFile     *f = input_files[ist->file_index];
 761     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
 762                                          ist->st->time_base;
 763     AVRational fr = ist->framerate;
 764     AVRational sar;
 765     AVBPrint args;
 766     char name[255];
 767     int ret, pad_idx = 0;
 768     int64_t tsoffset = 0;
 769     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
 770
 771     if (!par)
 772         return AVERROR(ENOMEM);
 773     memset(par, 0, sizeof(*par));
 774     par->format = AV_PIX_FMT_NONE;
 775
 776     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
 777         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
 778         ret = AVERROR(EINVAL);
 779         goto fail;
 780     }
 781
 782     if (!fr.num)
 783         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 784
 785     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 786         ret = sub2video_prepare(ist, ifilter);
 787         if (ret < 0)
 788             goto fail;
 789     }
 790
 791     sar = ifilter->sample_aspect_ratio;
 792     if(!sar.den)
 793         sar = (AVRational){0,1};
 794     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 795     av_bprintf(&args,
 796              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
 797              "pixel_aspect=%d/%d",
 798              ifilter->width, ifilter->height, ifilter->format,
 799              tb.num, tb.den, sar.num, sar.den);
 800     if (fr.num && fr.den)
 801         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
 802     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
 803              ist->file_index, ist->st->index);
 804
 805
 806     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
 807                                             args.str, NULL, fg->graph)) < 0)
 808         goto fail;
 809     par->hw_frames_ctx = ifilter->hw_frames_ctx;
 810     ret = av_buffersrc_parameters_set(ifilter->filter, par);
 811     if (ret < 0)
 812         goto fail;
 813     av_freep(&par);
 814     last_filter = ifilter->filter;
 815
 816     if (ist->autorotate) {
 817         double theta = get_rotation(ist->st);
 818
 819         if (fabs(theta - 90) < 1.0) {
 820             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
 821         } else if (fabs(theta - 180) < 1.0) {
 822             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
 823             if (ret < 0)
 824                 return ret;
 825             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
 826         } else if (fabs(theta - 270) < 1.0) {
 827             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
 828         } else if (fabs(theta) > 1.0) {
 829             char rotate_buf[64];
 830             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
 831             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
 832         }
 833         if (ret < 0)
 834             return ret;
 835     }
 836
 837     if (do_deinterlace) {
 838         AVFilterContext *yadif;
 839
 840         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
 841                  ist->file_index, ist->st->index);
 842         if ((ret = avfilter_graph_create_filter(&yadif,
 843                                                 avfilter_get_by_name("yadif"),
 844                                                 name, "", NULL,
 845                                                 fg->graph)) < 0)
 846             return ret;
 847
 848         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
 849             return ret;
 850
 851         last_filter = yadif;
 852     }
 853
 854     snprintf(name, sizeof(name), "trim_in_%d_%d",
 855              ist->file_index, ist->st->index);
 856     if (copy_ts) {
 857         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 858         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 859             tsoffset += f->ctx->start_time;
 860     }
 861     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 862                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 863                       &last_filter, &pad_idx, name);
 864     if (ret < 0)
 865         return ret;
 866
 867     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 868         return ret;
 869     return 0;
 870 fail:
 871     av_freep(&par);
 872
 873     return ret;
 874 }
 875
 876 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
 877                                         AVFilterInOut *in)
 878 {
 879     AVFilterContext *last_filter;
 880     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
 881     InputStream *ist = ifilter->ist;
 882     InputFile     *f = input_files[ist->file_index];
 883     AVBPrint args;
 884     char name[255];
 885     int ret, pad_idx = 0;
 886     int64_t tsoffset = 0;
 887
 888     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
 889         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
 890         return AVERROR(EINVAL);
 891     }
 892
 893     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
 894     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
 895              1, ifilter->sample_rate,
 896              ifilter->sample_rate,
 897              av_get_sample_fmt_name(ifilter->format));
 898     if (ifilter->channel_layout)
 899         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
 900                    ifilter->channel_layout);
 901     else
 902         av_bprintf(&args, ":channels=%d", ifilter->channels);
 903     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
 904              ist->file_index, ist->st->index);
 905
 906     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
 907                                             name, args.str, NULL,
 908                                             fg->graph)) < 0)
 909         return ret;
 910     last_filter = ifilter->filter;
 911
 912 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
 913     AVFilterContext *filt_ctx;                                              \
 914                                                                             \
 915     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
 916            "similarly to -af " filter_name "=%s.\n", arg);                  \
 917                                                                             \
 918     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
 919                 fg->index, filter_name, ist->file_index, ist->st->index);   \
 920     ret = avfilter_graph_create_filter(&filt_ctx,                           \
 921                                        avfilter_get_by_name(filter_name),   \
 922                                        name, arg, NULL, fg->graph);         \
 923     if (ret < 0)                                                            \
 924         return ret;                                                         \
 925                                                                             \
 926     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
 927     if (ret < 0)                                                            \
 928         return ret;                                                         \
 929                                                                             \
 930     last_filter = filt_ctx;                                                 \
 931 } while (0)
 932
 933     if (audio_sync_method > 0) {
 934         char args[256] = {0};
 935
 936         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
 937         if (audio_drift_threshold != 0.1)
 938             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
 939         if (!fg->reconfiguration)
 940             av_strlcatf(args, sizeof(args), ":first_pts=0");
 941         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
 942     }
 943
 944 //     if (ost->audio_channels_mapped) {
 945 //         int i;
 946 //         AVBPrint pan_buf;
 947 //         av_bprint_init(&pan_buf, 256, 8192);
 948 //         av_bprintf(&pan_buf, "0x%"PRIx64,
 949 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
 950 //         for (i = 0; i < ost->audio_channels_mapped; i++)
 951 //             if (ost->audio_channels_map[i] != -1)
 952 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
 953 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
 954 //         av_bprint_finalize(&pan_buf, NULL);
 955 //     }
 956
 957     if (audio_volume != 256) {
 958         char args[256];
 959
 960         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
 961                "audio filter instead.\n");
 962
 963         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
 964         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
 965     }
 966
 967     snprintf(name, sizeof(name), "trim for input stream %d:%d",
 968              ist->file_index, ist->st->index);
 969     if (copy_ts) {
 970         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
 971         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
 972             tsoffset += f->ctx->start_time;
 973     }
 974     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
 975                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
 976                       &last_filter, &pad_idx, name);
 977     if (ret < 0)
 978         return ret;
 979
 980     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
 981         return ret;
 982
 983     return 0;
 984 }
 985
 986 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
 987                                   AVFilterInOut *in)
 988 {
 989     if (!ifilter->ist->dec) {
 990         av_log(NULL, AV_LOG_ERROR,
 991                "No decoder for stream #%d:%d, filtering impossible\n",
 992                ifilter->ist->file_index, ifilter->ist->st->index);
 993         return AVERROR_DECODER_NOT_FOUND;
 994     }
 995     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
 996     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
 997     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
 998     default: av_assert0(0);
 999     }
1000 }
1001
1002 static void cleanup_filtergraph(FilterGraph *fg)
1003 {
1004     int i;
1005     for (i = 0; i < fg->nb_outputs; i++)
1006         fg->outputs[i]->filter = (AVFilterContext *)NULL;
1007     for (i = 0; i < fg->nb_inputs; i++)
1008         fg->inputs[i]->filter = (AVFilterContext *)NULL;
1009     avfilter_graph_free(&fg->graph);
1010 }
1011
1012 int configure_filtergraph(FilterGraph *fg)
1013 {
1014     AVFilterInOut *inputs, *outputs, *cur;
1015     int ret, i, simple = filtergraph_is_simple(fg);
1016     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1017                                       fg->graph_desc;
1018
1019     cleanup_filtergraph(fg);
1020     if (!(fg->graph = avfilter_graph_alloc()))
1021         return AVERROR(ENOMEM);
1022
1023     if (simple) {
1024         OutputStream *ost = fg->outputs[0]->ost;
1025         char args[512];
1026         AVDictionaryEntry *e = NULL;
1027
1028         fg->graph->nb_threads = filter_nbthreads;
1029
1030         args[0] = 0;
1031         while ((e = av_dict_get(ost->sws_dict, "", e,
1032                                 AV_DICT_IGNORE_SUFFIX))) {
1033             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1034         }
1035         if (strlen(args))
1036             args[strlen(args)-1] = 0;
1037         fg->graph->scale_sws_opts = av_strdup(args);
1038
1039         args[0] = 0;
1040         while ((e = av_dict_get(ost->swr_opts, "", e,
1041                                 AV_DICT_IGNORE_SUFFIX))) {
1042             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1043         }
1044         if (strlen(args))
1045             args[strlen(args)-1] = 0;
1046         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1047
1048         args[0] = '\0';
1049         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1050                                 AV_DICT_IGNORE_SUFFIX))) {
1051             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1052         }
1053         if (strlen(args))
1054             args[strlen(args) - 1] = '\0';
1055
1056         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1057         if (e)
1058             av_opt_set(fg->graph, "threads", e->value, 0);
1059     } else {
1060         fg->graph->nb_threads = filter_complex_nbthreads;
1061     }
1062
1063     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1064         goto fail;
1065
1066     ret = hw_device_setup_for_filter(fg);
1067     if (ret < 0)
1068         goto fail;
1069
1070     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1071         const char *num_inputs;
1072         const char *num_outputs;
1073         if (!outputs) {
1074             num_outputs = "0";
1075         } else if (outputs->next) {
1076             num_outputs = ">1";
1077         } else {
1078             num_outputs = "1";
1079         }
1080         if (!inputs) {
1081             num_inputs = "0";
1082         } else if (inputs->next) {
1083             num_inputs = ">1";
1084         } else {
1085             num_inputs = "1";
1086         }
1087         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1088                "to have exactly 1 input and 1 output."
1089                " However, it had %s input(s) and %s output(s)."
1090                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1091                graph_desc, num_inputs, num_outputs);
1092         ret = AVERROR(EINVAL);
1093         goto fail;
1094     }
1095
1096     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1097         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1098             avfilter_inout_free(&inputs);
1099             avfilter_inout_free(&outputs);
1100             goto fail;
1101         }
1102     avfilter_inout_free(&inputs);
1103
1104     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1105         configure_output_filter(fg, fg->outputs[i], cur);
1106     avfilter_inout_free(&outputs);
1107
1108     if (!auto_conversion_filters)
1109         avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1110     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1111         goto fail;
1112
1113     /* limit the lists of allowed formats to the ones selected, to
1114      * make sure they stay the same if the filtergraph is reconfigured later */
1115     for (i = 0; i < fg->nb_outputs; i++) {
1116         OutputFilter *ofilter = fg->outputs[i];
1117         AVFilterContext *sink = ofilter->filter;
1118
1119         ofilter->format = av_buffersink_get_format(sink);
1120
1121         ofilter->width  = av_buffersink_get_w(sink);
1122         ofilter->height = av_buffersink_get_h(sink);
1123
1124         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1125         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1126     }
1127
1128     fg->reconfiguration = 1;
1129
1130     for (i = 0; i < fg->nb_outputs; i++) {
1131         OutputStream *ost = fg->outputs[i]->ost;
1132         if (!ost->enc) {
1133             /* identical to the same check in ffmpeg.c, needed because
1134                complex filter graphs are initialized earlier */
1135             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1136                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1137             ret = AVERROR(EINVAL);
1138             goto fail;
1139         }
1140         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1141             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1142             av_buffersink_set_frame_size(ost->filter->filter,
1143                                          ost->enc_ctx->frame_size);
1144     }
1145
1146     for (i = 0; i < fg->nb_inputs; i++) {
1147         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1148             AVFrame *tmp;
1149             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1150             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1151             av_frame_free(&tmp);
1152             if (ret < 0)
1153                 goto fail;
1154         }
1155     }
1156
1157     /* send the EOFs for the finished inputs */
1158     for (i = 0; i < fg->nb_inputs; i++) {
1159         if (fg->inputs[i]->eof) {
1160             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1161             if (ret < 0)
1162                 goto fail;
1163         }
1164     }
1165
1166     /* process queued up subtitle packets */
1167     for (i = 0; i < fg->nb_inputs; i++) {
1168         InputStream *ist = fg->inputs[i]->ist;
1169         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1170             while (av_fifo_size(ist->sub2video.sub_queue)) {
1171                 AVSubtitle tmp;
1172                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1173                 sub2video_update(ist, INT64_MIN, &tmp);
1174                 avsubtitle_free(&tmp);
1175             }
1176         }
1177     }
1178
1179     return 0;
1180
1181 fail:
1182     cleanup_filtergraph(fg);
1183     return ret;
1184 }
1185
1186 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1187 {
1188     av_buffer_unref(&ifilter->hw_frames_ctx);
1189
1190     ifilter->format = frame->format;
1191
1192     ifilter->width               = frame->width;
1193     ifilter->height              = frame->height;
1194     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1195
1196     ifilter->sample_rate         = frame->sample_rate;
1197     ifilter->channels            = frame->channels;
1198     ifilter->channel_layout      = frame->channel_layout;
1199
1200     if (frame->hw_frames_ctx) {
1201         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1202         if (!ifilter->hw_frames_ctx)
1203             return AVERROR(ENOMEM);
1204     }
1205
1206     return 0;
1207 }
1208
1209 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1210 {
1211     int i;
1212     for (i = 0; i < fg->nb_inputs; i++)
1213         if (fg->inputs[i]->ist == ist)
1214             return 1;
1215     return 0;
1216 }
1217
1218 int filtergraph_is_simple(FilterGraph *fg)
1219 {
1220     return !fg->graph_desc;
1221 }