chasing indexing error

1 files changed, 0 insertions, 928 deletions

diff --git a/ffmpeg/ffmpeg_filter.c b/ffmpeg/ffmpeg_filter.c
deleted file mode 100644
index 9d945fc..0000000
--- a/ffmpeg/ffmpeg_filter.c
+++ /dev/null
@@ -1,928 +0,0 @@
-/*
- * ffmpeg filter configuration
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdint.h>
-
-#include "ffmpeg.h"
-
-#include "libavfilter/avfilter.h"
-#include "libavfilter/buffersink.h"
-
-#include "libavresample/avresample.h"
-
-#include "libavutil/avassert.h"
-#include "libavutil/avstring.h"
-#include "libavutil/bprint.h"
-#include "libavutil/channel_layout.h"
-#include "libavutil/opt.h"
-#include "libavutil/pixdesc.h"
-#include "libavutil/pixfmt.h"
-#include "libavutil/imgutils.h"
-#include "libavutil/samplefmt.h"
-
-enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target)
-{
-    if (codec && codec->pix_fmts) {
-        const enum AVPixelFormat *p = codec->pix_fmts;
-        const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
-        int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
-        enum AVPixelFormat best= AV_PIX_FMT_NONE;
-        if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
-            if (st->codec->codec_id == AV_CODEC_ID_MJPEG) {
-                p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
-            } else if (st->codec->codec_id == AV_CODEC_ID_LJPEG) {
-                p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
-                                                 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
-            }
-        }
-        for (; *p != AV_PIX_FMT_NONE; p++) {
-            best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
-            if (*p == target)
-                break;
-        }
-        if (*p == AV_PIX_FMT_NONE) {
-            if (target != AV_PIX_FMT_NONE)
-                av_log(NULL, AV_LOG_WARNING,
-                       "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
-                       av_get_pix_fmt_name(target),
-                       codec->name,
-                       av_get_pix_fmt_name(best));
-            return best;
-        }
-    }
-    return target;
-}
-
-void choose_sample_fmt(AVStream *st, AVCodec *codec)
-{
-    if (codec && codec->sample_fmts) {
-        const enum AVSampleFormat *p = codec->sample_fmts;
-        for (; *p != -1; p++) {
-            if (*p == st->codec->sample_fmt)
-                break;
-        }
-        if (*p == -1) {
-            if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
-                av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
-            if(av_get_sample_fmt_name(st->codec->sample_fmt))
-            av_log(NULL, AV_LOG_WARNING,
-                   "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
-                   av_get_sample_fmt_name(st->codec->sample_fmt),
-                   codec->name,
-                   av_get_sample_fmt_name(codec->sample_fmts[0]));
-            st->codec->sample_fmt = codec->sample_fmts[0];
-        }
-    }
-}
-
-static char *choose_pix_fmts(OutputStream *ost)
-{
-    AVDictionaryEntry *strict_dict = av_dict_get(ost->opts, "strict", NULL, 0);
-    if (strict_dict)
-        // used by choose_pixel_fmt() and below
-        av_opt_set(ost->st->codec, "strict", strict_dict->value, 0);
-
-     if (ost->keep_pix_fmt) {
-        if (ost->filter)
-            avfilter_graph_set_auto_convert(ost->filter->graph->graph,
-                                            AVFILTER_AUTO_CONVERT_NONE);
-        if (ost->st->codec->pix_fmt == AV_PIX_FMT_NONE)
-            return NULL;
-        return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
-    }
-    if (ost->st->codec->pix_fmt != AV_PIX_FMT_NONE) {
-        return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
-    } else if (ost->enc && ost->enc->pix_fmts) {
-        const enum AVPixelFormat *p;
-        AVIOContext *s = NULL;
-        uint8_t *ret;
-        int len;
-
-        if (avio_open_dyn_buf(&s) < 0)
-            exit_program(1);
-
-        p = ost->enc->pix_fmts;
-        if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
-            if (ost->st->codec->codec_id == AV_CODEC_ID_MJPEG) {
-                p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
-            } else if (ost->st->codec->codec_id == AV_CODEC_ID_LJPEG) {
-                p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
-                                                    AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
-            }
-        }
-
-        for (; *p != AV_PIX_FMT_NONE; p++) {
-            const char *name = av_get_pix_fmt_name(*p);
-            avio_printf(s, "%s|", name);
-        }
-        len = avio_close_dyn_buf(s, &ret);
-        ret[len - 1] = 0;
-        return ret;
-    } else
-        return NULL;
-}
-
-/* Define a function for building a string containing a list of
- * allowed formats. */
-#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name)           \
-static char *choose_ ## var ## s(OutputStream *ost)                            \
-{                                                                              \
-    if (ost->st->codec->var != none) {                                         \
-        get_name(ost->st->codec->var);                                         \
-        return av_strdup(name);                                                \
-    } else if (ost->enc && ost->enc->supported_list) {                         \
-        const type *p;                                                         \
-        AVIOContext *s = NULL;                                                 \
-        uint8_t *ret;                                                          \
-        int len;                                                               \
-                                                                               \
-        if (avio_open_dyn_buf(&s) < 0)                                         \
-            exit_program(1);                                                           \
-                                                                               \
-        for (p = ost->enc->supported_list; *p != none; p++) {                  \
-            get_name(*p);                                                      \
-            avio_printf(s, "%s|", name);                                       \
-        }                                                                      \
-        len = avio_close_dyn_buf(s, &ret);                                     \
-        ret[len - 1] = 0;                                                      \
-        return ret;                                                            \
-    } else                                                                     \
-        return NULL;                                                           \
-}
-
-// DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
-//                   GET_PIX_FMT_NAME)
-
-DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
-                  AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
-
-DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
-                  GET_SAMPLE_RATE_NAME)
-
-DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
-                  GET_CH_LAYOUT_NAME)
-
-FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
-{
-    FilterGraph *fg = av_mallocz(sizeof(*fg));
-
-    if (!fg)
-        exit_program(1);
-    fg->index = nb_filtergraphs;
-
-    GROW_ARRAY(fg->outputs, fg->nb_outputs);
-    if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
-        exit_program(1);
-    fg->outputs[0]->ost   = ost;
-    fg->outputs[0]->graph = fg;
-
-    ost->filter = fg->outputs[0];
-
-    GROW_ARRAY(fg->inputs, fg->nb_inputs);
-    if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
-        exit_program(1);
-    fg->inputs[0]->ist   = ist;
-    fg->inputs[0]->graph = fg;
-
-    GROW_ARRAY(ist->filters, ist->nb_filters);
-    ist->filters[ist->nb_filters - 1] = fg->inputs[0];
-
-    GROW_ARRAY(filtergraphs, nb_filtergraphs);
-    filtergraphs[nb_filtergraphs - 1] = fg;
-
-    return fg;
-}
-
-static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
-{
-    InputStream *ist = NULL;
-    enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
-    int i;
-
-    // TODO: support other filter types
-    if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
-        av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
-               "currently.\n");
-        exit_program(1);
-    }
-
-    if (in->name) {
-        AVFormatContext *s;
-        AVStream       *st = NULL;
-        char *p;
-        int file_idx = strtol(in->name, &p, 0);
-
-        if (file_idx < 0 || file_idx >= nb_input_files) {
-            av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
-                   file_idx, fg->graph_desc);
-            exit_program(1);
-        }
-        s = input_files[file_idx]->ctx;
-
-        for (i = 0; i < s->nb_streams; i++) {
-            enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
-            if (stream_type != type &&
-                !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
-                  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
-                continue;
-            if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
-                st = s->streams[i];
-                break;
-            }
-        }
-        if (!st) {
-            av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
-                   "matches no streams.\n", p, fg->graph_desc);
-            exit_program(1);
-        }
-        ist = input_streams[input_files[file_idx]->ist_index + st->index];
-    } else {
-        /* find the first unused stream of corresponding type */
-        for (i = 0; i < nb_input_streams; i++) {
-            ist = input_streams[i];
-            if (ist->st->codec->codec_type == type && ist->discard)
-                break;
-        }
-        if (i == nb_input_streams) {
-            av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
-                   "unlabeled input pad %d on filter %s\n", in->pad_idx,
-                   in->filter_ctx->name);
-            exit_program(1);
-        }
-    }
-    av_assert0(ist);
-
-    ist->discard         = 0;
-    ist->decoding_needed++;
-    ist->st->discard = AVDISCARD_NONE;
-
-    GROW_ARRAY(fg->inputs, fg->nb_inputs);
-    if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
-        exit_program(1);
-    fg->inputs[fg->nb_inputs - 1]->ist   = ist;
-    fg->inputs[fg->nb_inputs - 1]->graph = fg;
-
-    GROW_ARRAY(ist->filters, ist->nb_filters);
-    ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
-}
-
-static int insert_trim(int64_t start_time, int64_t duration,
-                       AVFilterContext **last_filter, int *pad_idx,
-                       const char *filter_name)
-{
-    AVFilterGraph *graph = (*last_filter)->graph;
-    AVFilterContext *ctx;
-    const AVFilter *trim;
-    enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
-    const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
-    int ret = 0;
-
-    if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
-        return 0;
-
-    trim = avfilter_get_by_name(name);
-    if (!trim) {
-        av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
-               "recording time.\n", name);
-        return AVERROR_FILTER_NOT_FOUND;
-    }
-
-    ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
-    if (!ctx)
-        return AVERROR(ENOMEM);
-
-    if (duration != INT64_MAX) {
-        ret = av_opt_set_int(ctx, "durationi", duration,
-                                AV_OPT_SEARCH_CHILDREN);
-    }
-    if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
-        ret = av_opt_set_int(ctx, "starti", start_time,
-                                AV_OPT_SEARCH_CHILDREN);
-    }
-    if (ret < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
-        return ret;
-    }
-
-    ret = avfilter_init_str(ctx, NULL);
-    if (ret < 0)
-        return ret;
-
-    ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
-    if (ret < 0)
-        return ret;
-
-    *last_filter = ctx;
-    *pad_idx     = 0;
-    return 0;
-}
-
-static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
-    char *pix_fmts;
-    OutputStream *ost = ofilter->ost;
-    OutputFile    *of = output_files[ost->file_index];
-    AVCodecContext *codec = ost->st->codec;
-    AVFilterContext *last_filter = out->filter_ctx;
-    int pad_idx = out->pad_idx;
-    int ret;
-    char name[255];
-
-    snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
-    ret = avfilter_graph_create_filter(&ofilter->filter,
-                                       avfilter_get_by_name("buffersink"),
-                                       name, NULL, NULL, fg->graph);
-
-    if (ret < 0)
-        return ret;
-
-    if (codec->width || codec->height) {
-        char args[255];
-        AVFilterContext *filter;
-
-        snprintf(args, sizeof(args), "%d:%d:0x%X",
-                 codec->width,
-                 codec->height,
-                 (unsigned)ost->sws_flags);
-        snprintf(name, sizeof(name), "scaler for output stream %d:%d",
-                 ost->file_index, ost->index);
-        if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
-                                                name, args, NULL, fg->graph)) < 0)
-            return ret;
-        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
-            return ret;
-
-        last_filter = filter;
-        pad_idx = 0;
-    }
-
-    if ((pix_fmts = choose_pix_fmts(ost))) {
-        AVFilterContext *filter;
-        snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
-                 ost->file_index, ost->index);
-        ret = avfilter_graph_create_filter(&filter,
-                                                avfilter_get_by_name("format"),
-                                                "format", pix_fmts, NULL,
-                                                fg->graph);
-        av_freep(&pix_fmts);
-        if (ret < 0)
-            return ret;
-        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
-            return ret;
-
-        last_filter = filter;
-        pad_idx     = 0;
-    }
-
-    if (ost->frame_rate.num && 0) {
-        AVFilterContext *fps;
-        char args[255];
-
-        snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
-                 ost->frame_rate.den);
-        snprintf(name, sizeof(name), "fps for output stream %d:%d",
-                 ost->file_index, ost->index);
-        ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
-                                           name, args, NULL, fg->graph);
-        if (ret < 0)
-            return ret;
-
-        ret = avfilter_link(last_filter, pad_idx, fps, 0);
-        if (ret < 0)
-            return ret;
-        last_filter = fps;
-        pad_idx = 0;
-    }
-
-    snprintf(name, sizeof(name), "trim for output stream %d:%d",
-             ost->file_index, ost->index);
-    ret = insert_trim(of->start_time, of->recording_time,
-                      &last_filter, &pad_idx, name);
-    if (ret < 0)
-        return ret;
-
-
-    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
-        return ret;
-
-    return 0;
-}
-
-static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
-    OutputStream *ost = ofilter->ost;
-    OutputFile    *of = output_files[ost->file_index];
-    AVCodecContext *codec  = ost->st->codec;
-    AVFilterContext *last_filter = out->filter_ctx;
-    int pad_idx = out->pad_idx;
-    char *sample_fmts, *sample_rates, *channel_layouts;
-    char name[255];
-    int ret;
-
-    snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
-    ret = avfilter_graph_create_filter(&ofilter->filter,
-                                       avfilter_get_by_name("abuffersink"),
-                                       name, NULL, NULL, fg->graph);
-    if (ret < 0)
-        return ret;
-    if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
-        return ret;
-
-#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
-    AVFilterContext *filt_ctx;                                              \
-                                                                            \
-    av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
-           "similarly to -af " filter_name "=%s.\n", arg);                  \
-                                                                            \
-    ret = avfilter_graph_create_filter(&filt_ctx,                           \
-                                       avfilter_get_by_name(filter_name),   \
-                                       filter_name, arg, NULL, fg->graph);  \
-    if (ret < 0)                                                            \
-        return ret;                                                         \
-                                                                            \
-    ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
-    if (ret < 0)                                                            \
-        return ret;                                                         \
-                                                                            \
-    last_filter = filt_ctx;                                                 \
-    pad_idx = 0;                                                            \
-} while (0)
-    if (ost->audio_channels_mapped) {
-        int i;
-        AVBPrint pan_buf;
-        av_bprint_init(&pan_buf, 256, 8192);
-        av_bprintf(&pan_buf, "0x%"PRIx64,
-                   av_get_default_channel_layout(ost->audio_channels_mapped));
-        for (i = 0; i < ost->audio_channels_mapped; i++)
-            if (ost->audio_channels_map[i] != -1)
-                av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
-
-        AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
-        av_bprint_finalize(&pan_buf, NULL);
-    }
-
-    if (codec->channels && !codec->channel_layout)
-        codec->channel_layout = av_get_default_channel_layout(codec->channels);
-
-    sample_fmts     = choose_sample_fmts(ost);
-    sample_rates    = choose_sample_rates(ost);
-    channel_layouts = choose_channel_layouts(ost);
-    if (sample_fmts || sample_rates || channel_layouts) {
-        AVFilterContext *format;
-        char args[256];
-        args[0] = 0;
-
-        if (sample_fmts)
-            av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
-                            sample_fmts);
-        if (sample_rates)
-            av_strlcatf(args, sizeof(args), "sample_rates=%s:",
-                            sample_rates);
-        if (channel_layouts)
-            av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
-                            channel_layouts);
-
-        av_freep(&sample_fmts);
-        av_freep(&sample_rates);
-        av_freep(&channel_layouts);
-
-        snprintf(name, sizeof(name), "audio format for output stream %d:%d",
-                 ost->file_index, ost->index);
-        ret = avfilter_graph_create_filter(&format,
-                                           avfilter_get_by_name("aformat"),
-                                           name, args, NULL, fg->graph);
-        if (ret < 0)
-            return ret;
-
-        ret = avfilter_link(last_filter, pad_idx, format, 0);
-        if (ret < 0)
-            return ret;
-
-        last_filter = format;
-        pad_idx = 0;
-    }
-
-    if (audio_volume != 256 && 0) {
-        char args[256];
-
-        snprintf(args, sizeof(args), "%f", audio_volume / 256.);
-        AUTO_INSERT_FILTER("-vol", "volume", args);
-    }
-
-    if (ost->apad && of->shortest) {
-        char args[256];
-        int i;
-
-        for (i=0; i<of->ctx->nb_streams; i++)
-            if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
-                break;
-
-        if (i<of->ctx->nb_streams) {
-            snprintf(args, sizeof(args), "%s", ost->apad);
-            AUTO_INSERT_FILTER("-apad", "apad", args);
-        }
-    }
-
-    snprintf(name, sizeof(name), "trim for output stream %d:%d",
-             ost->file_index, ost->index);
-    ret = insert_trim(of->start_time, of->recording_time,
-                      &last_filter, &pad_idx, name);
-    if (ret < 0)
-        return ret;
-
-    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
-        return ret;
-
-    return 0;
-}
-
-#define DESCRIBE_FILTER_LINK(f, inout, in)                         \
-{                                                                  \
-    AVFilterContext *ctx = inout->filter_ctx;                      \
-    AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
-    int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;   \
-    AVIOContext *pb;                                               \
-                                                                   \
-    if (avio_open_dyn_buf(&pb) < 0)                                \
-        exit_program(1);                                           \
-                                                                   \
-    avio_printf(pb, "%s", ctx->filter->name);                      \
-    if (nb_pads > 1)                                               \
-        avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
-    avio_w8(pb, 0);                                                \
-    avio_close_dyn_buf(pb, &f->name);                              \
-}
-
-int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
-    av_freep(&ofilter->name);
-    DESCRIBE_FILTER_LINK(ofilter, out, 0);
-
-    switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
-    case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
-    case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
-    default: av_assert0(0);
-    }
-}
-
-static int sub2video_prepare(InputStream *ist)
-{
-    AVFormatContext *avf = input_files[ist->file_index]->ctx;
-    int i, w, h;
-
-    /* Compute the size of the canvas for the subtitles stream.
-       If the subtitles codec has set a size, use it. Otherwise use the
-       maximum dimensions of the video streams in the same file. */
-    w = ist->st->codec->width;
-    h = ist->st->codec->height;
-    if (!(w && h)) {
-        for (i = 0; i < avf->nb_streams; i++) {
-            if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
-                w = FFMAX(w, avf->streams[i]->codec->width);
-                h = FFMAX(h, avf->streams[i]->codec->height);
-            }
-        }
-        if (!(w && h)) {
-            w = FFMAX(w, 720);
-            h = FFMAX(h, 576);
-        }
-        av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
-    }
-    ist->sub2video.w = ist->st->codec->width  = ist->resample_width  = w;
-    ist->sub2video.h = ist->st->codec->height = ist->resample_height = h;
-
-    /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
-       palettes for all rectangles are identical or compatible */
-    ist->resample_pix_fmt = ist->st->codec->pix_fmt = AV_PIX_FMT_RGB32;
-
-    ist->sub2video.frame = av_frame_alloc();
-    if (!ist->sub2video.frame)
-        return AVERROR(ENOMEM);
-    return 0;
-}
-
-static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
-                                        AVFilterInOut *in)
-{
-    AVFilterContext *last_filter;
-    const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
-    InputStream *ist = ifilter->ist;
-    InputFile     *f = input_files[ist->file_index];
-    AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
-                                         ist->st->time_base;
-    AVRational fr = ist->framerate;
-    AVRational sar;
-    AVBPrint args;
-    char name[255];
-    int ret, pad_idx = 0;
-
-    if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
-        av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
-        return AVERROR(EINVAL);
-    }
-
-    if (!fr.num)
-        fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
-
-    if (ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
-        ret = sub2video_prepare(ist);
-        if (ret < 0)
-            return ret;
-    }
-
-    sar = ist->st->sample_aspect_ratio.num ?
-          ist->st->sample_aspect_ratio :
-          ist->st->codec->sample_aspect_ratio;
-    if(!sar.den)
-        sar = (AVRational){0,1};
-    av_bprint_init(&args, 0, 1);
-    av_bprintf(&args,
-             "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
-             "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
-             ist->resample_height,
-             ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
-             tb.num, tb.den, sar.num, sar.den,
-             SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
-    if (fr.num && fr.den)
-        av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
-    snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
-             ist->file_index, ist->st->index);
-
-    if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
-                                            args.str, NULL, fg->graph)) < 0)
-        return ret;
-    last_filter = ifilter->filter;
-
-    if (ist->framerate.num) {
-        AVFilterContext *setpts;
-
-        snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
-                 ist->file_index, ist->st->index);
-        if ((ret = avfilter_graph_create_filter(&setpts,
-                                                avfilter_get_by_name("setpts"),
-                                                name, "N", NULL,
-                                                fg->graph)) < 0)
-            return ret;
-
-        if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
-            return ret;
-
-        last_filter = setpts;
-    }
-
-    if (do_deinterlace) {
-        AVFilterContext *yadif;
-
-        snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
-                 ist->file_index, ist->st->index);
-        if ((ret = avfilter_graph_create_filter(&yadif,
-                                                avfilter_get_by_name("yadif"),
-                                                name, "", NULL,
-                                                fg->graph)) < 0)
-            return ret;
-
-        if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
-            return ret;
-
-        last_filter = yadif;
-    }
-
-    snprintf(name, sizeof(name), "trim for input stream %d:%d",
-             ist->file_index, ist->st->index);
-    ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
-                      AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
-    if (ret < 0)
-        return ret;
-
-    if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
-        return ret;
-    return 0;
-}
-
-static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
-                                        AVFilterInOut *in)
-{
-    AVFilterContext *last_filter;
-    const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
-    InputStream *ist = ifilter->ist;
-    InputFile     *f = input_files[ist->file_index];
-    AVBPrint args;
-    char name[255];
-    int ret, pad_idx = 0;
-
-    if (ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
-        av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
-        return AVERROR(EINVAL);
-    }
-
-    av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
-    av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
-             1, ist->st->codec->sample_rate,
-             ist->st->codec->sample_rate,
-             av_get_sample_fmt_name(ist->st->codec->sample_fmt));
-    if (ist->st->codec->channel_layout)
-        av_bprintf(&args, ":channel_layout=0x%"PRIx64,
-                   ist->st->codec->channel_layout);
-    else
-        av_bprintf(&args, ":channels=%d", ist->st->codec->channels);
-    snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
-             ist->file_index, ist->st->index);
-
-    if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
-                                            name, args.str, NULL,
-                                            fg->graph)) < 0)
-        return ret;
-    last_filter = ifilter->filter;
-
-#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
-    AVFilterContext *filt_ctx;                                              \
-                                                                            \
-    av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
-           "similarly to -af " filter_name "=%s.\n", arg);                  \
-                                                                            \
-    snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
-                fg->index, filter_name, ist->file_index, ist->st->index);   \
-    ret = avfilter_graph_create_filter(&filt_ctx,                           \
-                                       avfilter_get_by_name(filter_name),   \
-                                       name, arg, NULL, fg->graph);         \
-    if (ret < 0)                                                            \
-        return ret;                                                         \
-                                                                            \
-    ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
-    if (ret < 0)                                                            \
-        return ret;                                                         \
-                                                                            \
-    last_filter = filt_ctx;                                                 \
-} while (0)
-
-    if (audio_sync_method > 0) {
-        char args[256] = {0};
-
-        av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
-        if (audio_drift_threshold != 0.1)
-            av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
-        if (!fg->reconfiguration)
-            av_strlcatf(args, sizeof(args), ":first_pts=0");
-        AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
-    }
-
-//     if (ost->audio_channels_mapped) {
-//         int i;
-//         AVBPrint pan_buf;
-//         av_bprint_init(&pan_buf, 256, 8192);
-//         av_bprintf(&pan_buf, "0x%"PRIx64,
-//                    av_get_default_channel_layout(ost->audio_channels_mapped));
-//         for (i = 0; i < ost->audio_channels_mapped; i++)
-//             if (ost->audio_channels_map[i] != -1)
-//                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
-//         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
-//         av_bprint_finalize(&pan_buf, NULL);
-//     }
-
-    if (audio_volume != 256) {
-        char args[256];
-
-        av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
-               "audio filter instead.\n");
-
-        snprintf(args, sizeof(args), "%f", audio_volume / 256.);
-        AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
-    }
-
-    snprintf(name, sizeof(name), "trim for input stream %d:%d",
-             ist->file_index, ist->st->index);
-    ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
-                      AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
-    if (ret < 0)
-        return ret;
-
-    if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
-        return ret;
-
-    return 0;
-}
-
-static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
-                                  AVFilterInOut *in)
-{
-    av_freep(&ifilter->name);
-    DESCRIBE_FILTER_LINK(ifilter, in, 1);
-
-    switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
-    case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
-    case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
-    default: av_assert0(0);
-    }
-}
-
-int configure_filtergraph(FilterGraph *fg)
-{
-    AVFilterInOut *inputs, *outputs, *cur;
-    int ret, i, init = !fg->graph, simple = !fg->graph_desc;
-    const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
-                                      fg->graph_desc;
-
-    avfilter_graph_free(&fg->graph);
-    if (!(fg->graph = avfilter_graph_alloc()))
-        return AVERROR(ENOMEM);
-
-    if (simple) {
-        OutputStream *ost = fg->outputs[0]->ost;
-        char args[512];
-        AVDictionaryEntry *e = NULL;
-
-        snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
-        fg->graph->scale_sws_opts = av_strdup(args);
-
-        args[0] = 0;
-        while ((e = av_dict_get(ost->swr_opts, "", e,
-                                AV_DICT_IGNORE_SUFFIX))) {
-            av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
-        }
-        if (strlen(args))
-            args[strlen(args)-1] = 0;
-        av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
-
-        args[0] = '\0';
-        while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
-                                AV_DICT_IGNORE_SUFFIX))) {
-            av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
-        }
-        if (strlen(args))
-            args[strlen(args) - 1] = '\0';
-        fg->graph->resample_lavr_opts = av_strdup(args);
-
-        e = av_dict_get(ost->opts, "threads", NULL, 0);
-        if (e)
-            av_opt_set(fg->graph, "threads", e->value, 0);
-    }
-
-    if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
-        return ret;
-
-    if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
-        av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
-               "exactly one input and output.\n", graph_desc);
-        return AVERROR(EINVAL);
-    }
-
-    for (cur = inputs; !simple && init && cur; cur = cur->next)
-        init_input_filter(fg, cur);
-
-    for (cur = inputs, i = 0; cur; cur = cur->next, i++)
-        if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
-            return ret;
-    avfilter_inout_free(&inputs);
-
-    if (!init || simple) {
-        /* we already know the mappings between lavfi outputs and output streams,
-         * so we can finish the setup */
-        for (cur = outputs, i = 0; cur; cur = cur->next, i++)
-            configure_output_filter(fg, fg->outputs[i], cur);
-        avfilter_inout_free(&outputs);
-
-        if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
-            return ret;
-    } else {
-        /* wait until output mappings are processed */
-        for (cur = outputs; cur;) {
-            GROW_ARRAY(fg->outputs, fg->nb_outputs);
-            if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
-                exit_program(1);
-            fg->outputs[fg->nb_outputs - 1]->graph   = fg;
-            fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
-            cur = cur->next;
-            fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
-        }
-    }
-
-    fg->reconfiguration = 1;
-    return 0;
-}
-
-int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
-{
-    int i;
-    for (i = 0; i < fg->nb_inputs; i++)
-        if (fg->inputs[i]->ist == ist)
-            return 1;
-    return 0;
-}
-