547 lines
21 KiB
C
547 lines
21 KiB
C
/*
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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 "libavutil/audioconvert.h"
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#include "libavutil/avassert.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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*/
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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_program(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 PixelFormat, pix_fmt, pix_fmts, 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_program(1);
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fg->index = nb_filtergraphs;
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fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
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fg->nb_outputs + 1);
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if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
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exit_program(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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fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
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fg->nb_inputs + 1);
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if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
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exit_program(1);
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fg->inputs[0]->ist = ist;
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fg->inputs[0]->graph = fg;
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ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
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&ist->nb_filters, ist->nb_filters + 1);
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ist->filters[ist->nb_filters - 1] = fg->inputs[0];
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filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
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&nb_filtergraphs, nb_filtergraphs + 1);
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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_program(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_program(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_program(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_program(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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fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
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&fg->nb_inputs, fg->nb_inputs + 1);
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if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
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exit_program(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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ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
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&ist->nb_filters, ist->nb_filters + 1);
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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_program(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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char args[256];
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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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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 ((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_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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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);
|
|
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[255];
|
|
snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
|
|
fg->graph->scale_sws_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;) {
|
|
fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
|
|
&fg->nb_outputs, fg->nb_outputs + 1);
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|