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889 lines
34 KiB
889 lines
34 KiB
/* |
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* ffmpeg filter configuration |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "ffmpeg.h" |
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|
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#include "libavfilter/avfilter.h" |
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#include "libavfilter/buffersink.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/bprint.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/imgutils.h" |
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#include "libavutil/samplefmt.h" |
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enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target) |
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{ |
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if (codec && codec->pix_fmts) { |
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const enum AVPixelFormat *p = codec->pix_fmts; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target); |
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int has_alpha = desc ? desc->nb_components % 2 == 0 : 0; |
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enum AVPixelFormat best= AV_PIX_FMT_NONE; |
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if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) { |
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if (st->codec->codec_id == AV_CODEC_ID_MJPEG) { |
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p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE }; |
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} else if (st->codec->codec_id == AV_CODEC_ID_LJPEG) { |
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p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE }; |
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} |
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} |
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for (; *p != AV_PIX_FMT_NONE; p++) { |
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best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL); |
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if (*p == target) |
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break; |
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} |
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if (*p == AV_PIX_FMT_NONE) { |
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if (target != AV_PIX_FMT_NONE) |
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av_log(NULL, AV_LOG_WARNING, |
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"Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n", |
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av_get_pix_fmt_name(target), |
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codec->name, |
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av_get_pix_fmt_name(best)); |
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return best; |
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} |
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} |
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return target; |
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} |
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void choose_sample_fmt(AVStream *st, AVCodec *codec) |
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{ |
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if (codec && codec->sample_fmts) { |
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const enum AVSampleFormat *p = codec->sample_fmts; |
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for (; *p != -1; p++) { |
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if (*p == st->codec->sample_fmt) |
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break; |
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} |
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if (*p == -1) { |
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if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0])) |
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av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n"); |
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if(av_get_sample_fmt_name(st->codec->sample_fmt)) |
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av_log(NULL, AV_LOG_WARNING, |
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"Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n", |
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av_get_sample_fmt_name(st->codec->sample_fmt), |
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codec->name, |
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av_get_sample_fmt_name(codec->sample_fmts[0])); |
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st->codec->sample_fmt = codec->sample_fmts[0]; |
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} |
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} |
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} |
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static char *choose_pix_fmts(OutputStream *ost) |
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{ |
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if (ost->keep_pix_fmt) { |
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if (ost->filter) |
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avfilter_graph_set_auto_convert(ost->filter->graph->graph, |
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AVFILTER_AUTO_CONVERT_NONE); |
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if (ost->st->codec->pix_fmt == AV_PIX_FMT_NONE) |
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return NULL; |
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return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt)); |
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} |
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if (ost->st->codec->pix_fmt != AV_PIX_FMT_NONE) { |
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return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt))); |
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} else if (ost->enc && ost->enc->pix_fmts) { |
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const enum AVPixelFormat *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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if (avio_open_dyn_buf(&s) < 0) |
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exit_program(1); |
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p = ost->enc->pix_fmts; |
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if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) { |
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if (ost->st->codec->codec_id == AV_CODEC_ID_MJPEG) { |
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p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE }; |
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} else if (ost->st->codec->codec_id == AV_CODEC_ID_LJPEG) { |
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p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE }; |
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} |
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} |
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for (; *p != AV_PIX_FMT_NONE; p++) { |
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const char *name = av_get_pix_fmt_name(*p); |
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avio_printf(s, "%s|", 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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/* 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) \ |
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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 && 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|", 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_program(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_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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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_program(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_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 filtergraph 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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enum AVMediaType stream_type = s->streams[i]->codec->codec_type; |
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if (stream_type != type && |
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!(stream_type == AVMEDIA_TYPE_SUBTITLE && |
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type == AVMEDIA_TYPE_VIDEO /* sub2video hack */)) |
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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\n", 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++; |
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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_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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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 insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pad_idx) |
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{ |
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OutputFile *of = output_files[ost->file_index]; |
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AVFilterGraph *graph = (*last_filter)->graph; |
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AVFilterContext *ctx; |
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const AVFilter *trim; |
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const char *name = ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO ? "trim" : "atrim"; |
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char filter_name[128]; |
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int ret = 0; |
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if (of->recording_time == INT64_MAX && !of->start_time) |
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return 0; |
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// Use with duration and without output starttime is buggy with trim filters |
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if (!of->start_time) |
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return 0; |
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trim = avfilter_get_by_name(name); |
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if (!trim) { |
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av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit " |
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"recording time.\n", name); |
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return AVERROR_FILTER_NOT_FOUND; |
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} |
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snprintf(filter_name, sizeof(filter_name), "%s for output stream %d:%d", |
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name, ost->file_index, ost->index); |
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ctx = avfilter_graph_alloc_filter(graph, trim, filter_name); |
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if (!ctx) |
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return AVERROR(ENOMEM); |
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if (of->recording_time != INT64_MAX) { |
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ret = av_opt_set_double(ctx, "duration", (double)of->recording_time / 1e6, |
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AV_OPT_SEARCH_CHILDREN); |
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} |
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if (ret >= 0 && of->start_time) { |
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ret = av_opt_set_double(ctx, "start", (double)of->start_time / 1e6, |
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AV_OPT_SEARCH_CHILDREN); |
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} |
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if (ret < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name); |
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return ret; |
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} |
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ret = avfilter_init_str(ctx, NULL); |
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if (ret < 0) |
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return ret; |
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ret = avfilter_link(*last_filter, *pad_idx, ctx, 0); |
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if (ret < 0) |
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return ret; |
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*last_filter = ctx; |
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*pad_idx = 0; |
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return 0; |
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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: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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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); |
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av_freep(&pix_fmts); |
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if (ret < 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 (ost->frame_rate.num && 0) { |
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AVFilterContext *fps; |
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char args[255]; |
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|
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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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ret = insert_trim(ost, &last_filter, &pad_idx); |
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if (ret < 0) |
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return ret; |
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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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OutputFile *of = output_files[ost->file_index]; |
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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 ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0) |
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return ret; |
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|
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#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \ |
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AVFilterContext *filt_ctx; \ |
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\ |
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av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \ |
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"similarly to -af " filter_name "=%s.\n", arg); \ |
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\ |
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ret = avfilter_graph_create_filter(&filt_ctx, \ |
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avfilter_get_by_name(filter_name), \ |
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filter_name, arg, 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(last_filter, pad_idx, filt_ctx, 0); \ |
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if (ret < 0) \ |
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return ret; \ |
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\ |
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last_filter = filt_ctx; \ |
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pad_idx = 0; \ |
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} while (0) |
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if (ost->audio_channels_mapped) { |
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int i; |
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AVBPrint pan_buf; |
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av_bprint_init(&pan_buf, 256, 8192); |
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av_bprintf(&pan_buf, "0x%"PRIx64, |
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av_get_default_channel_layout(ost->audio_channels_mapped)); |
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for (i = 0; i < ost->audio_channels_mapped; i++) |
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if (ost->audio_channels_map[i] != -1) |
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av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]); |
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|
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AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str); |
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av_bprint_finalize(&pan_buf, NULL); |
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} |
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|
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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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|
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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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args[0] = 0; |
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|
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if (sample_fmts) |
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av_strlcatf(args, sizeof(args), "sample_fmts=%s:", |
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sample_fmts); |
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if (sample_rates) |
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av_strlcatf(args, sizeof(args), "sample_rates=%s:", |
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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); |
|
} |
|
} |
|
|
|
ret = insert_trim(ost, &last_filter, &pad_idx); |
|
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->input_count : ctx->output_count; \ |
|
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 *first_filter = in->filter_ctx; |
|
const AVFilter *buffer_filt = avfilter_get_by_name("buffer"); |
|
InputStream *ist = ifilter->ist; |
|
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 pad_idx = in->pad_idx; |
|
int ret; |
|
|
|
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->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; |
|
|
|
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(setpts, 0, first_filter, pad_idx)) < 0) |
|
return ret; |
|
|
|
first_filter = setpts; |
|
pad_idx = 0; |
|
} |
|
|
|
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(yadif, 0, first_filter, pad_idx)) < 0) |
|
return ret; |
|
|
|
first_filter = yadif; |
|
pad_idx = 0; |
|
} |
|
|
|
if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0) |
|
return ret; |
|
return 0; |
|
} |
|
|
|
static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, |
|
AVFilterInOut *in) |
|
{ |
|
AVFilterContext *first_filter = in->filter_ctx; |
|
const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer"); |
|
InputStream *ist = ifilter->ist; |
|
int pad_idx = in->pad_idx; |
|
AVBPrint args; |
|
char name[255]; |
|
int ret; |
|
|
|
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; |
|
|
|
#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(filt_ctx, 0, first_filter, pad_idx); \ |
|
if (ret < 0) \ |
|
return ret; \ |
|
\ |
|
first_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); |
|
} |
|
if ((ret = avfilter_link(ifilter->filter, 0, first_filter, 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); |
|
} |
|
|
|
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; |
|
} |
|
|
|
|