diff options
Diffstat (limited to 'ffmpeg_filter.c')
| -rw-r--r-- | ffmpeg_filter.c | 928 |
1 files changed, 928 insertions, 0 deletions
diff --git a/ffmpeg_filter.c b/ffmpeg_filter.c new file mode 100644 index 0000000000..9d945fca49 --- /dev/null +++ b/ffmpeg_filter.c @@ -0,0 +1,928 @@ +/* + * 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; +} + |