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575 lines
21 KiB
575 lines
21 KiB
/* |
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* avconv filter configuration |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avconv.h" |
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#include "libavfilter/avfilter.h" |
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#include "libavfilter/avfiltergraph.h" |
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#include "libavresample/avresample.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/pixfmt.h" |
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#include "libavutil/samplefmt.h" |
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|
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/* Define a function for building a string containing a list of |
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* allowed formats. */ |
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#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator)\ |
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static char *choose_ ## var ## s(OutputStream *ost) \ |
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{ \ |
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if (ost->st->codec->var != none) { \ |
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get_name(ost->st->codec->var); \ |
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return av_strdup(name); \ |
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} else if (ost->enc->supported_list) { \ |
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const type *p; \ |
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AVIOContext *s = NULL; \ |
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uint8_t *ret; \ |
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int len; \ |
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\ |
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if (avio_open_dyn_buf(&s) < 0) \ |
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exit(1); \ |
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\ |
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for (p = ost->enc->supported_list; *p != none; p++) { \ |
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get_name(*p); \ |
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avio_printf(s, "%s" separator, name); \ |
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} \ |
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len = avio_close_dyn_buf(s, &ret); \ |
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ret[len - 1] = 0; \ |
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return ret; \ |
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} else \ |
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return NULL; \ |
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} |
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DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE, |
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GET_PIX_FMT_NAME, ":") |
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DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts, |
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AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",") |
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DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0, |
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GET_SAMPLE_RATE_NAME, ",") |
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DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0, |
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GET_CH_LAYOUT_NAME, ",") |
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FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost) |
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{ |
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FilterGraph *fg = av_mallocz(sizeof(*fg)); |
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if (!fg) |
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exit(1); |
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fg->index = nb_filtergraphs; |
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GROW_ARRAY(fg->outputs, fg->nb_outputs); |
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if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0])))) |
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exit(1); |
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fg->outputs[0]->ost = ost; |
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fg->outputs[0]->graph = fg; |
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ost->filter = fg->outputs[0]; |
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GROW_ARRAY(fg->inputs, fg->nb_inputs); |
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if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0])))) |
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exit(1); |
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fg->inputs[0]->ist = ist; |
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fg->inputs[0]->graph = fg; |
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GROW_ARRAY(ist->filters, ist->nb_filters); |
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ist->filters[ist->nb_filters - 1] = fg->inputs[0]; |
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GROW_ARRAY(filtergraphs, nb_filtergraphs); |
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filtergraphs[nb_filtergraphs - 1] = fg; |
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return fg; |
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} |
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static void init_input_filter(FilterGraph *fg, AVFilterInOut *in) |
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{ |
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InputStream *ist = NULL; |
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enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx); |
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int i; |
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// TODO: support other filter types |
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if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) { |
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av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported " |
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"currently.\n"); |
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exit(1); |
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} |
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if (in->name) { |
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AVFormatContext *s; |
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AVStream *st = NULL; |
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char *p; |
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int file_idx = strtol(in->name, &p, 0); |
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if (file_idx < 0 || file_idx >= nb_input_files) { |
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av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n", |
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file_idx, fg->graph_desc); |
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exit(1); |
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} |
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s = input_files[file_idx]->ctx; |
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for (i = 0; i < s->nb_streams; i++) { |
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if (s->streams[i]->codec->codec_type != type) |
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continue; |
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if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) { |
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st = s->streams[i]; |
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break; |
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} |
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} |
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if (!st) { |
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av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s " |
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"matches no streams.\n", p, fg->graph_desc); |
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exit(1); |
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} |
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ist = input_streams[input_files[file_idx]->ist_index + st->index]; |
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} else { |
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/* find the first unused stream of corresponding type */ |
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for (i = 0; i < nb_input_streams; i++) { |
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ist = input_streams[i]; |
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if (ist->st->codec->codec_type == type && ist->discard) |
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break; |
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} |
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if (i == nb_input_streams) { |
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av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for " |
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"unlabeled input pad %d on filter %s", in->pad_idx, |
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in->filter_ctx->name); |
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exit(1); |
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} |
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} |
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av_assert0(ist); |
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ist->discard = 0; |
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ist->decoding_needed = 1; |
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ist->st->discard = AVDISCARD_NONE; |
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GROW_ARRAY(fg->inputs, fg->nb_inputs); |
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if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0])))) |
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exit(1); |
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fg->inputs[fg->nb_inputs - 1]->ist = ist; |
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fg->inputs[fg->nb_inputs - 1]->graph = fg; |
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GROW_ARRAY(ist->filters, ist->nb_filters); |
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ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1]; |
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} |
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static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) |
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{ |
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char *pix_fmts; |
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OutputStream *ost = ofilter->ost; |
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AVCodecContext *codec = ost->st->codec; |
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AVFilterContext *last_filter = out->filter_ctx; |
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int pad_idx = out->pad_idx; |
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int ret; |
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char name[255]; |
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snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index); |
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ret = avfilter_graph_create_filter(&ofilter->filter, |
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avfilter_get_by_name("buffersink"), |
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name, NULL, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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if (codec->width || codec->height) { |
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char args[255]; |
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AVFilterContext *filter; |
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snprintf(args, sizeof(args), "%d:%d:flags=0x%X", |
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codec->width, |
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codec->height, |
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(unsigned)ost->sws_flags); |
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snprintf(name, sizeof(name), "scaler for output stream %d:%d", |
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ost->file_index, ost->index); |
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if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"), |
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name, args, NULL, fg->graph)) < 0) |
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return ret; |
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if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0) |
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return ret; |
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last_filter = filter; |
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pad_idx = 0; |
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} |
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if ((pix_fmts = choose_pix_fmts(ost))) { |
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AVFilterContext *filter; |
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snprintf(name, sizeof(name), "pixel format for output stream %d:%d", |
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ost->file_index, ost->index); |
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if ((ret = avfilter_graph_create_filter(&filter, |
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avfilter_get_by_name("format"), |
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"format", pix_fmts, NULL, |
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fg->graph)) < 0) |
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return ret; |
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if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0) |
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return ret; |
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last_filter = filter; |
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pad_idx = 0; |
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av_freep(&pix_fmts); |
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} |
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if (ost->frame_rate.num) { |
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AVFilterContext *fps; |
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char args[255]; |
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snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num, |
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ost->frame_rate.den); |
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snprintf(name, sizeof(name), "fps for output stream %d:%d", |
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ost->file_index, ost->index); |
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ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"), |
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name, args, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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ret = avfilter_link(last_filter, pad_idx, fps, 0); |
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if (ret < 0) |
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return ret; |
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last_filter = fps; |
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pad_idx = 0; |
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} |
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if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0) |
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return ret; |
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return 0; |
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} |
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static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) |
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{ |
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OutputStream *ost = ofilter->ost; |
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AVCodecContext *codec = ost->st->codec; |
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AVFilterContext *last_filter = out->filter_ctx; |
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int pad_idx = out->pad_idx; |
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char *sample_fmts, *sample_rates, *channel_layouts; |
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char name[255]; |
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int ret; |
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snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index); |
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ret = avfilter_graph_create_filter(&ofilter->filter, |
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avfilter_get_by_name("abuffersink"), |
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name, NULL, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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if (codec->channels && !codec->channel_layout) |
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codec->channel_layout = av_get_default_channel_layout(codec->channels); |
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sample_fmts = choose_sample_fmts(ost); |
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sample_rates = choose_sample_rates(ost); |
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channel_layouts = choose_channel_layouts(ost); |
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if (sample_fmts || sample_rates || channel_layouts) { |
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AVFilterContext *format; |
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char args[256]; |
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int len = 0; |
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if (sample_fmts) |
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len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:", |
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sample_fmts); |
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if (sample_rates) |
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len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:", |
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sample_rates); |
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if (channel_layouts) |
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len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:", |
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channel_layouts); |
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args[len - 1] = 0; |
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av_freep(&sample_fmts); |
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av_freep(&sample_rates); |
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av_freep(&channel_layouts); |
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snprintf(name, sizeof(name), "audio format for output stream %d:%d", |
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ost->file_index, ost->index); |
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ret = avfilter_graph_create_filter(&format, |
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avfilter_get_by_name("aformat"), |
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name, args, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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ret = avfilter_link(last_filter, pad_idx, format, 0); |
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if (ret < 0) |
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return ret; |
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last_filter = format; |
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pad_idx = 0; |
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} |
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if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0) |
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return ret; |
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return 0; |
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} |
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#define DESCRIBE_FILTER_LINK(f, inout, in) \ |
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{ \ |
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AVFilterContext *ctx = inout->filter_ctx; \ |
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AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \ |
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int nb_pads = in ? ctx->input_count : ctx->output_count; \ |
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AVIOContext *pb; \ |
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\ |
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if (avio_open_dyn_buf(&pb) < 0) \ |
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exit(1); \ |
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\ |
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avio_printf(pb, "%s", ctx->filter->name); \ |
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if (nb_pads > 1) \ |
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avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\ |
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avio_w8(pb, 0); \ |
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avio_close_dyn_buf(pb, &f->name); \ |
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} |
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int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) |
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{ |
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av_freep(&ofilter->name); |
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DESCRIBE_FILTER_LINK(ofilter, out, 0); |
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switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) { |
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case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out); |
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case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out); |
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default: av_assert0(0); |
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} |
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} |
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static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, |
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AVFilterInOut *in) |
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{ |
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AVFilterContext *first_filter = in->filter_ctx; |
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AVFilter *filter = avfilter_get_by_name("buffer"); |
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InputStream *ist = ifilter->ist; |
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AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) : |
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ist->st->time_base; |
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AVRational sar; |
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char args[255], name[255]; |
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int pad_idx = in->pad_idx; |
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int ret; |
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sar = ist->st->sample_aspect_ratio.num ? |
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ist->st->sample_aspect_ratio : |
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ist->st->codec->sample_aspect_ratio; |
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snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width, |
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ist->st->codec->height, ist->st->codec->pix_fmt, |
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tb.num, tb.den, sar.num, sar.den); |
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snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index, |
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ist->file_index, ist->st->index); |
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if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name, |
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args, NULL, fg->graph)) < 0) |
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return ret; |
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if (ist->framerate.num) { |
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AVFilterContext *setpts; |
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snprintf(name, sizeof(name), "force CFR for input from stream %d:%d", |
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ist->file_index, ist->st->index); |
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if ((ret = avfilter_graph_create_filter(&setpts, |
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avfilter_get_by_name("setpts"), |
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name, "N", NULL, |
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fg->graph)) < 0) |
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return ret; |
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if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0) |
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return ret; |
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first_filter = setpts; |
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pad_idx = 0; |
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} |
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if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0) |
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return ret; |
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return 0; |
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} |
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static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, |
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AVFilterInOut *in) |
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{ |
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AVFilterContext *first_filter = in->filter_ctx; |
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AVFilter *filter = avfilter_get_by_name("abuffer"); |
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InputStream *ist = ifilter->ist; |
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int pad_idx = in->pad_idx; |
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char args[255], name[255]; |
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int ret; |
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snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s" |
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":channel_layout=0x%"PRIx64, |
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1, ist->st->codec->sample_rate, |
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ist->st->codec->sample_rate, |
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av_get_sample_fmt_name(ist->st->codec->sample_fmt), |
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ist->st->codec->channel_layout); |
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snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index, |
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ist->file_index, ist->st->index); |
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if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, |
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name, args, NULL, |
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fg->graph)) < 0) |
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return ret; |
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if (audio_sync_method > 0) { |
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AVFilterContext *async; |
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int len = 0; |
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av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the " |
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"asyncts audio filter instead.\n"); |
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if (audio_sync_method > 1) |
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len += snprintf(args + len, sizeof(args) - len, "compensate=1:" |
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"max_comp=%d:", audio_sync_method); |
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snprintf(args + len, sizeof(args) - len, "min_delta=%f", |
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audio_drift_threshold); |
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snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d", |
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fg->index, ist->file_index, ist->st->index); |
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ret = avfilter_graph_create_filter(&async, |
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avfilter_get_by_name("asyncts"), |
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name, args, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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|
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ret = avfilter_link(async, 0, first_filter, pad_idx); |
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if (ret < 0) |
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return ret; |
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first_filter = async; |
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pad_idx = 0; |
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} |
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if (audio_volume != 256) { |
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AVFilterContext *volume; |
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|
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av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume " |
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"audio filter instead.\n"); |
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|
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snprintf(args, sizeof(args), "volume=%f", audio_volume / 256.0); |
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|
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snprintf(name, sizeof(name), "graph %d volume for input stream %d:%d", |
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fg->index, ist->file_index, ist->st->index); |
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ret = avfilter_graph_create_filter(&volume, |
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avfilter_get_by_name("volume"), |
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name, args, NULL, fg->graph); |
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if (ret < 0) |
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return ret; |
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|
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ret = avfilter_link(volume, 0, first_filter, pad_idx); |
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if (ret < 0) |
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return ret; |
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first_filter = volume; |
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pad_idx = 0; |
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} |
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if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0) |
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return ret; |
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|
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return 0; |
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} |
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|
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static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter, |
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AVFilterInOut *in) |
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{ |
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av_freep(&ifilter->name); |
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DESCRIBE_FILTER_LINK(ifilter, in, 1); |
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|
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switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) { |
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case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in); |
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case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in); |
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default: av_assert0(0); |
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} |
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} |
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|
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int configure_filtergraph(FilterGraph *fg) |
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{ |
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AVFilterInOut *inputs, *outputs, *cur; |
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int ret, i, init = !fg->graph, simple = !fg->graph_desc; |
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const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter : |
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fg->graph_desc; |
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|
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avfilter_graph_free(&fg->graph); |
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if (!(fg->graph = avfilter_graph_alloc())) |
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return AVERROR(ENOMEM); |
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|
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if (simple) { |
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OutputStream *ost = fg->outputs[0]->ost; |
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char args[512]; |
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AVDictionaryEntry *e = NULL; |
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const AVClass *rc = avresample_get_class(); |
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|
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snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags); |
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fg->graph->scale_sws_opts = av_strdup(args); |
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|
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args[0] = '\0'; |
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while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e, |
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AV_DICT_IGNORE_SUFFIX))) { |
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av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); |
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} |
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if (strlen(args)) |
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args[strlen(args) - 1] = '\0'; |
|
fg->graph->resample_lavr_opts = av_strdup(args); |
|
} |
|
|
|
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(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; |
|
} |
|
} |
|
|
|
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; |
|
} |
|
|
|
|