forked from KolibriOS/kolibrios
504 lines
16 KiB
C
504 lines
16 KiB
C
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/*
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* Tee pseudo-muxer
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* Copyright (c) 2012 Nicolas George
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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 License
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* 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
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* GNU 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 License
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* along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avutil.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#define MAX_SLAVES 16
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typedef struct {
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AVFormatContext *avf;
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AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
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/** map from input to output streams indexes,
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* disabled output streams are set to -1 */
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int *stream_map;
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} TeeSlave;
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typedef struct TeeContext {
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const AVClass *class;
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unsigned nb_slaves;
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TeeSlave slaves[MAX_SLAVES];
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} TeeContext;
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static const char *const slave_delim = "|";
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static const char *const slave_opt_open = "[";
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static const char *const slave_opt_close = "]";
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static const char *const slave_opt_delim = ":]"; /* must have the close too */
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static const char *const slave_bsfs_spec_sep = "/";
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static const AVClass tee_muxer_class = {
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.class_name = "Tee muxer",
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.item_name = av_default_item_name,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static int parse_slave_options(void *log, char *slave,
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AVDictionary **options, char **filename)
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{
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const char *p;
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char *key, *val;
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int ret;
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if (!strspn(slave, slave_opt_open)) {
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*filename = slave;
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return 0;
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}
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p = slave + 1;
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if (strspn(p, slave_opt_close)) {
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*filename = (char *)p + 1;
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return 0;
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}
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while (1) {
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ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
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if (ret < 0) {
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av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
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goto fail;
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}
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ret = av_dict_set(options, key, val,
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AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
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if (ret < 0)
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goto fail;
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if (strspn(p, slave_opt_close))
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break;
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p++;
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}
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*filename = (char *)p + 1;
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return 0;
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fail:
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av_dict_free(options);
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return ret;
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}
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/**
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* Parse list of bitstream filters and add them to the list of filters
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* pointed to by bsfs.
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*
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* The list must be specified in the form:
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* BSFS ::= BSF[,BSFS]
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*/
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static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
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AVBitStreamFilterContext **bsfs)
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{
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char *bsf_name, *buf, *dup, *saveptr;
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int ret = 0;
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if (!(dup = buf = av_strdup(bsfs_spec)))
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return AVERROR(ENOMEM);
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while (bsf_name = av_strtok(buf, ",", &saveptr)) {
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AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);
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if (!bsf) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Cannot initialize bitstream filter with name '%s', "
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"unknown filter or internal error happened\n",
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bsf_name);
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ret = AVERROR_UNKNOWN;
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goto end;
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}
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/* append bsf context to the list of bsf contexts */
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*bsfs = bsf;
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bsfs = &bsf->next;
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buf = NULL;
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}
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end:
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av_free(dup);
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return ret;
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}
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static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
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{
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int i, ret;
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AVDictionary *options = NULL;
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AVDictionaryEntry *entry;
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char *filename;
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char *format = NULL, *select = NULL;
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AVFormatContext *avf2 = NULL;
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AVStream *st, *st2;
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int stream_count;
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if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
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return ret;
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#define STEAL_OPTION(option, field) do { \
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if ((entry = av_dict_get(options, option, NULL, 0))) { \
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field = entry->value; \
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entry->value = NULL; /* prevent it from being freed */ \
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av_dict_set(&options, option, NULL, 0); \
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} \
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} while (0)
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STEAL_OPTION("f", format);
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STEAL_OPTION("select", select);
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ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
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if (ret < 0)
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goto end;
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av_dict_copy(&avf2->metadata, avf->metadata, 0);
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tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
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if (!tee_slave->stream_map) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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stream_count = 0;
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for (i = 0; i < avf->nb_streams; i++) {
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st = avf->streams[i];
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if (select) {
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ret = avformat_match_stream_specifier(avf, avf->streams[i], select);
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if (ret < 0) {
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av_log(avf, AV_LOG_ERROR,
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"Invalid stream specifier '%s' for output '%s'\n",
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select, slave);
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goto end;
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}
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if (ret == 0) { /* no match */
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tee_slave->stream_map[i] = -1;
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continue;
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}
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}
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tee_slave->stream_map[i] = stream_count++;
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if (!(st2 = avformat_new_stream(avf2, NULL))) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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st2->id = st->id;
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st2->r_frame_rate = st->r_frame_rate;
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st2->time_base = st->time_base;
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st2->start_time = st->start_time;
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st2->duration = st->duration;
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st2->nb_frames = st->nb_frames;
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st2->disposition = st->disposition;
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st2->sample_aspect_ratio = st->sample_aspect_ratio;
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st2->avg_frame_rate = st->avg_frame_rate;
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av_dict_copy(&st2->metadata, st->metadata, 0);
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if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)
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goto end;
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}
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if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
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if ((ret = avio_open(&avf2->pb, filename, AVIO_FLAG_WRITE)) < 0) {
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av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",
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slave, av_err2str(ret));
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goto end;
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}
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}
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if ((ret = avformat_write_header(avf2, &options)) < 0) {
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av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
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slave, av_err2str(ret));
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goto end;
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}
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tee_slave->avf = avf2;
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tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));
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if (!tee_slave->bsfs) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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entry = NULL;
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while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
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const char *spec = entry->key + strlen("bsfs");
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if (*spec) {
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if (strspn(spec, slave_bsfs_spec_sep) != 1) {
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av_log(avf, AV_LOG_ERROR,
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"Specifier separator in '%s' is '%c', but only characters '%s' "
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"are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
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return AVERROR(EINVAL);
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}
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spec++; /* consume separator */
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}
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for (i = 0; i < avf2->nb_streams; i++) {
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ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
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if (ret < 0) {
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av_log(avf, AV_LOG_ERROR,
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"Invalid stream specifier '%s' in bsfs option '%s' for slave "
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"output '%s'\n", spec, entry->key, filename);
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goto end;
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}
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if (ret > 0) {
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av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
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"output '%s'\n", spec, entry->value, i, filename);
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if (tee_slave->bsfs[i]) {
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av_log(avf, AV_LOG_WARNING,
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"Duplicate bsfs specification associated to stream %d of slave "
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"output '%s', filters will be ignored\n", i, filename);
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continue;
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}
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ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
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if (ret < 0) {
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av_log(avf, AV_LOG_ERROR,
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"Error parsing bitstream filter sequence '%s' associated to "
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"stream %d of slave output '%s'\n", entry->value, i, filename);
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goto end;
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}
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}
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}
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av_dict_set(&options, entry->key, NULL, 0);
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}
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if (options) {
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entry = NULL;
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while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
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av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
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ret = AVERROR_OPTION_NOT_FOUND;
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goto end;
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}
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end:
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av_free(format);
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av_free(select);
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av_dict_free(&options);
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return ret;
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}
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static void close_slaves(AVFormatContext *avf)
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{
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TeeContext *tee = avf->priv_data;
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AVFormatContext *avf2;
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unsigned i, j;
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for (i = 0; i < tee->nb_slaves; i++) {
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avf2 = tee->slaves[i].avf;
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for (j = 0; j < avf2->nb_streams; j++) {
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AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];
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while (bsf) {
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bsf_next = bsf->next;
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av_bitstream_filter_close(bsf);
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bsf = bsf_next;
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}
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}
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av_freep(&tee->slaves[i].stream_map);
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av_freep(&tee->slaves[i].bsfs);
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avio_closep(&avf2->pb);
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avformat_free_context(avf2);
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tee->slaves[i].avf = NULL;
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}
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}
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static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
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{
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int i;
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av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
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slave->avf->filename, slave->avf->oformat->name);
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for (i = 0; i < slave->avf->nb_streams; i++) {
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AVStream *st = slave->avf->streams[i];
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AVBitStreamFilterContext *bsf = slave->bsfs[i];
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av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
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i, avcodec_get_name(st->codec->codec_id),
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av_get_media_type_string(st->codec->codec_type));
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if (bsf) {
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av_log(log_ctx, log_level, " bsfs:");
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while (bsf) {
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av_log(log_ctx, log_level, "%s%s",
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bsf->filter->name, bsf->next ? "," : "");
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bsf = bsf->next;
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}
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}
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av_log(log_ctx, log_level, "\n");
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}
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}
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static int tee_write_header(AVFormatContext *avf)
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{
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TeeContext *tee = avf->priv_data;
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unsigned nb_slaves = 0, i;
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const char *filename = avf->filename;
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char *slaves[MAX_SLAVES];
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int ret;
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while (*filename) {
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if (nb_slaves == MAX_SLAVES) {
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av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",
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MAX_SLAVES);
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ret = AVERROR_PATCHWELCOME;
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goto fail;
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}
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if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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if (strspn(filename, slave_delim))
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filename++;
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}
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for (i = 0; i < nb_slaves; i++) {
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if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)
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goto fail;
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||
|
|
log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
|
||
|
|
av_freep(&slaves[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
tee->nb_slaves = nb_slaves;
|
||
|
|
|
||
|
|
for (i = 0; i < avf->nb_streams; i++) {
|
||
|
|
int j, mapped = 0;
|
||
|
|
for (j = 0; j < tee->nb_slaves; j++)
|
||
|
|
mapped += tee->slaves[j].stream_map[i] >= 0;
|
||
|
|
if (!mapped)
|
||
|
|
av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
|
||
|
|
"to any slave.\n", i);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail:
|
||
|
|
for (i = 0; i < nb_slaves; i++)
|
||
|
|
av_freep(&slaves[i]);
|
||
|
|
close_slaves(avf);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int filter_packet(void *log_ctx, AVPacket *pkt,
|
||
|
|
AVFormatContext *fmt_ctx, AVBitStreamFilterContext *bsf_ctx)
|
||
|
|
{
|
||
|
|
AVCodecContext *enc_ctx = fmt_ctx->streams[pkt->stream_index]->codec;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
while (bsf_ctx) {
|
||
|
|
AVPacket new_pkt = *pkt;
|
||
|
|
ret = av_bitstream_filter_filter(bsf_ctx, enc_ctx, NULL,
|
||
|
|
&new_pkt.data, &new_pkt.size,
|
||
|
|
pkt->data, pkt->size,
|
||
|
|
pkt->flags & AV_PKT_FLAG_KEY);
|
||
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
||
|
|
if (ret == 0 && new_pkt.data != pkt->data
|
||
|
|
#if FF_API_DESTRUCT_PACKET
|
||
|
|
&& new_pkt.destruct
|
||
|
|
#endif
|
||
|
|
) {
|
||
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
||
|
|
if ((ret = av_copy_packet(&new_pkt, pkt)) < 0)
|
||
|
|
break;
|
||
|
|
ret = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret > 0) {
|
||
|
|
pkt->side_data = NULL;
|
||
|
|
pkt->side_data_elems = 0;
|
||
|
|
av_free_packet(pkt);
|
||
|
|
new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
|
||
|
|
av_buffer_default_free, NULL, 0);
|
||
|
|
if (!new_pkt.buf)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (ret < 0) {
|
||
|
|
av_log(log_ctx, AV_LOG_ERROR,
|
||
|
|
"Failed to filter bitstream with filter %s for stream %d in file '%s' with codec %s\n",
|
||
|
|
bsf_ctx->filter->name, pkt->stream_index, fmt_ctx->filename,
|
||
|
|
avcodec_get_name(enc_ctx->codec_id));
|
||
|
|
}
|
||
|
|
*pkt = new_pkt;
|
||
|
|
|
||
|
|
bsf_ctx = bsf_ctx->next;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tee_write_trailer(AVFormatContext *avf)
|
||
|
|
{
|
||
|
|
TeeContext *tee = avf->priv_data;
|
||
|
|
AVFormatContext *avf2;
|
||
|
|
int ret_all = 0, ret;
|
||
|
|
unsigned i;
|
||
|
|
|
||
|
|
for (i = 0; i < tee->nb_slaves; i++) {
|
||
|
|
avf2 = tee->slaves[i].avf;
|
||
|
|
if ((ret = av_write_trailer(avf2)) < 0)
|
||
|
|
if (!ret_all)
|
||
|
|
ret_all = ret;
|
||
|
|
if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
|
||
|
|
if ((ret = avio_closep(&avf2->pb)) < 0)
|
||
|
|
if (!ret_all)
|
||
|
|
ret_all = ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
close_slaves(avf);
|
||
|
|
return ret_all;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
|
||
|
|
{
|
||
|
|
TeeContext *tee = avf->priv_data;
|
||
|
|
AVFormatContext *avf2;
|
||
|
|
AVPacket pkt2;
|
||
|
|
int ret_all = 0, ret;
|
||
|
|
unsigned i, s;
|
||
|
|
int s2;
|
||
|
|
AVRational tb, tb2;
|
||
|
|
|
||
|
|
for (i = 0; i < tee->nb_slaves; i++) {
|
||
|
|
avf2 = tee->slaves[i].avf;
|
||
|
|
s = pkt->stream_index;
|
||
|
|
s2 = tee->slaves[i].stream_map[s];
|
||
|
|
if (s2 < 0)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
|
||
|
|
(ret = av_dup_packet(&pkt2))< 0)
|
||
|
|
if (!ret_all) {
|
||
|
|
ret_all = ret;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
tb = avf ->streams[s ]->time_base;
|
||
|
|
tb2 = avf2->streams[s2]->time_base;
|
||
|
|
pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
|
||
|
|
pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
|
||
|
|
pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
|
||
|
|
pkt2.stream_index = s2;
|
||
|
|
|
||
|
|
filter_packet(avf2, &pkt2, avf2, tee->slaves[i].bsfs[s2]);
|
||
|
|
if ((ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
|
||
|
|
if (!ret_all)
|
||
|
|
ret_all = ret;
|
||
|
|
}
|
||
|
|
return ret_all;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVOutputFormat ff_tee_muxer = {
|
||
|
|
.name = "tee",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
|
||
|
|
.priv_data_size = sizeof(TeeContext),
|
||
|
|
.write_header = tee_write_header,
|
||
|
|
.write_trailer = tee_write_trailer,
|
||
|
|
.write_packet = tee_write_packet,
|
||
|
|
.priv_class = &tee_muxer_class,
|
||
|
|
.flags = AVFMT_NOFILE,
|
||
|
|
};
|