577 lines
17 KiB
C
577 lines
17 KiB
C
/*
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* Copyright (c) 2012 Stefano Sabatini
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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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/**
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* @file
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* send commands filter
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*/
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/file.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "avfiltergraph.h"
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#include "audio.h"
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#include "video.h"
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#define COMMAND_FLAG_ENTER 1
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#define COMMAND_FLAG_LEAVE 2
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static inline char *make_command_flags_str(AVBPrint *pbuf, int flags)
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{
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static const char * const flag_strings[] = { "enter", "leave" };
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int i, is_first = 1;
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av_bprint_init(pbuf, 0, AV_BPRINT_SIZE_AUTOMATIC);
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for (i = 0; i < FF_ARRAY_ELEMS(flag_strings); i++) {
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if (flags & 1<<i) {
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if (!is_first)
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av_bprint_chars(pbuf, '+', 1);
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av_bprintf(pbuf, "%s", flag_strings[i]);
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is_first = 0;
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}
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}
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return pbuf->str;
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}
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typedef struct {
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int flags;
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char *target, *command, *arg;
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int index;
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} Command;
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typedef struct {
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int64_t start_ts; ///< start timestamp expressed as microseconds units
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int64_t end_ts; ///< end timestamp expressed as microseconds units
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int index; ///< unique index for these interval commands
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Command *commands;
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int nb_commands;
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int enabled; ///< current time detected inside this interval
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} Interval;
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typedef struct {
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const AVClass *class;
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Interval *intervals;
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int nb_intervals;
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char *commands_filename;
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char *commands_str;
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} SendCmdContext;
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#define OFFSET(x) offsetof(SendCmdContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "commands", "set commands", OFFSET(commands_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
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{ "c", "set commands", OFFSET(commands_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
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{ "filename", "set commands file", OFFSET(commands_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
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{ "f", "set commands file", OFFSET(commands_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
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{NULL},
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};
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#define SPACES " \f\t\n\r"
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static void skip_comments(const char **buf)
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{
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while (**buf) {
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/* skip leading spaces */
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*buf += strspn(*buf, SPACES);
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if (**buf != '#')
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break;
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(*buf)++;
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/* skip comment until the end of line */
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*buf += strcspn(*buf, "\n");
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if (**buf)
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(*buf)++;
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}
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}
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#define COMMAND_DELIMS " \f\t\n\r,;"
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static int parse_command(Command *cmd, int cmd_count, int interval_count,
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const char **buf, void *log_ctx)
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{
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int ret;
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memset(cmd, 0, sizeof(Command));
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cmd->index = cmd_count;
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/* format: [FLAGS] target command arg */
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*buf += strspn(*buf, SPACES);
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/* parse flags */
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if (**buf == '[') {
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(*buf)++; /* skip "[" */
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while (**buf) {
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int len = strcspn(*buf, "|+]");
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if (!strncmp(*buf, "enter", strlen("enter"))) cmd->flags |= COMMAND_FLAG_ENTER;
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else if (!strncmp(*buf, "leave", strlen("leave"))) cmd->flags |= COMMAND_FLAG_LEAVE;
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else {
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char flag_buf[64];
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av_strlcpy(flag_buf, *buf, sizeof(flag_buf));
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av_log(log_ctx, AV_LOG_ERROR,
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"Unknown flag '%s' in interval #%d, command #%d\n",
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flag_buf, interval_count, cmd_count);
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return AVERROR(EINVAL);
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}
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*buf += len;
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if (**buf == ']')
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break;
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if (!strspn(*buf, "+|")) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid flags char '%c' in interval #%d, command #%d\n",
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**buf, interval_count, cmd_count);
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return AVERROR(EINVAL);
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}
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if (**buf)
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(*buf)++;
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}
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if (**buf != ']') {
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av_log(log_ctx, AV_LOG_ERROR,
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"Missing flag terminator or extraneous data found at the end of flags "
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"in interval #%d, command #%d\n", interval_count, cmd_count);
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return AVERROR(EINVAL);
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}
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(*buf)++; /* skip "]" */
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} else {
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cmd->flags = COMMAND_FLAG_ENTER;
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}
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*buf += strspn(*buf, SPACES);
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cmd->target = av_get_token(buf, COMMAND_DELIMS);
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if (!cmd->target || !cmd->target[0]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"No target specified in interval #%d, command #%d\n",
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interval_count, cmd_count);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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*buf += strspn(*buf, SPACES);
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cmd->command = av_get_token(buf, COMMAND_DELIMS);
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if (!cmd->command || !cmd->command[0]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"No command specified in interval #%d, command #%d\n",
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interval_count, cmd_count);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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*buf += strspn(*buf, SPACES);
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cmd->arg = av_get_token(buf, COMMAND_DELIMS);
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return 1;
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fail:
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av_freep(&cmd->target);
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av_freep(&cmd->command);
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av_freep(&cmd->arg);
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return ret;
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}
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static int parse_commands(Command **cmds, int *nb_cmds, int interval_count,
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const char **buf, void *log_ctx)
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{
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int cmd_count = 0;
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int ret, n = 0;
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AVBPrint pbuf;
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*cmds = NULL;
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*nb_cmds = 0;
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while (**buf) {
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Command cmd;
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if ((ret = parse_command(&cmd, cmd_count, interval_count, buf, log_ctx)) < 0)
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return ret;
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cmd_count++;
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/* (re)allocate commands array if required */
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if (*nb_cmds == n) {
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n = FFMAX(16, 2*n); /* first allocation = 16, or double the number */
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*cmds = av_realloc_f(*cmds, n, 2*sizeof(Command));
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if (!*cmds) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Could not (re)allocate command array\n");
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return AVERROR(ENOMEM);
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}
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}
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(*cmds)[(*nb_cmds)++] = cmd;
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*buf += strspn(*buf, SPACES);
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if (**buf && **buf != ';' && **buf != ',') {
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av_log(log_ctx, AV_LOG_ERROR,
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"Missing separator or extraneous data found at the end of "
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"interval #%d, in command #%d\n",
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interval_count, cmd_count);
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av_log(log_ctx, AV_LOG_ERROR,
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"Command was parsed as: flags:[%s] target:%s command:%s arg:%s\n",
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make_command_flags_str(&pbuf, cmd.flags), cmd.target, cmd.command, cmd.arg);
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return AVERROR(EINVAL);
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}
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if (**buf == ';')
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break;
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if (**buf == ',')
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(*buf)++;
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}
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return 0;
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}
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#define DELIMS " \f\t\n\r,;"
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static int parse_interval(Interval *interval, int interval_count,
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const char **buf, void *log_ctx)
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{
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char *intervalstr;
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int ret;
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*buf += strspn(*buf, SPACES);
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if (!**buf)
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return 0;
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/* reset data */
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memset(interval, 0, sizeof(Interval));
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interval->index = interval_count;
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/* format: INTERVAL COMMANDS */
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/* parse interval */
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intervalstr = av_get_token(buf, DELIMS);
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if (intervalstr && intervalstr[0]) {
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char *start, *end;
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start = av_strtok(intervalstr, "-", &end);
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if ((ret = av_parse_time(&interval->start_ts, start, 1)) < 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid start time specification '%s' in interval #%d\n",
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start, interval_count);
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goto end;
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}
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if (end) {
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if ((ret = av_parse_time(&interval->end_ts, end, 1)) < 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid end time specification '%s' in interval #%d\n",
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end, interval_count);
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goto end;
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}
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} else {
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interval->end_ts = INT64_MAX;
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}
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if (interval->end_ts < interval->start_ts) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid end time '%s' in interval #%d: "
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"cannot be lesser than start time '%s'\n",
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end, interval_count, start);
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ret = AVERROR(EINVAL);
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goto end;
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}
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} else {
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av_log(log_ctx, AV_LOG_ERROR,
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"No interval specified for interval #%d\n", interval_count);
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ret = AVERROR(EINVAL);
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goto end;
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}
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/* parse commands */
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ret = parse_commands(&interval->commands, &interval->nb_commands,
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interval_count, buf, log_ctx);
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end:
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av_free(intervalstr);
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return ret;
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}
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static int parse_intervals(Interval **intervals, int *nb_intervals,
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const char *buf, void *log_ctx)
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{
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int interval_count = 0;
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int ret, n = 0;
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*intervals = NULL;
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*nb_intervals = 0;
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while (1) {
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Interval interval;
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skip_comments(&buf);
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if (!(*buf))
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break;
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if ((ret = parse_interval(&interval, interval_count, &buf, log_ctx)) < 0)
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return ret;
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buf += strspn(buf, SPACES);
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if (*buf) {
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if (*buf != ';') {
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av_log(log_ctx, AV_LOG_ERROR,
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"Missing terminator or extraneous data found at the end of interval #%d\n",
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interval_count);
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return AVERROR(EINVAL);
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}
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buf++; /* skip ';' */
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}
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interval_count++;
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/* (re)allocate commands array if required */
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if (*nb_intervals == n) {
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n = FFMAX(16, 2*n); /* first allocation = 16, or double the number */
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*intervals = av_realloc_f(*intervals, n, 2*sizeof(Interval));
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if (!*intervals) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Could not (re)allocate intervals array\n");
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return AVERROR(ENOMEM);
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}
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}
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(*intervals)[(*nb_intervals)++] = interval;
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}
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return 0;
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}
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static int cmp_intervals(const void *a, const void *b)
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{
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const Interval *i1 = a;
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const Interval *i2 = b;
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int64_t ts_diff = i1->start_ts - i2->start_ts;
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int ret;
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ret = ts_diff > 0 ? 1 : ts_diff < 0 ? -1 : 0;
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return ret == 0 ? i1->index - i2->index : ret;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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SendCmdContext *sendcmd = ctx->priv;
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int ret, i, j;
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if (sendcmd->commands_filename && sendcmd->commands_str) {
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av_log(ctx, AV_LOG_ERROR,
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"Only one of the filename or commands options must be specified\n");
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return AVERROR(EINVAL);
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}
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if (sendcmd->commands_filename) {
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uint8_t *file_buf, *buf;
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size_t file_bufsize;
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ret = av_file_map(sendcmd->commands_filename,
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&file_buf, &file_bufsize, 0, ctx);
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if (ret < 0)
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return ret;
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/* create a 0-terminated string based on the read file */
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buf = av_malloc(file_bufsize + 1);
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if (!buf) {
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av_file_unmap(file_buf, file_bufsize);
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return AVERROR(ENOMEM);
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}
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memcpy(buf, file_buf, file_bufsize);
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buf[file_bufsize] = 0;
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av_file_unmap(file_buf, file_bufsize);
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sendcmd->commands_str = buf;
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}
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if ((ret = parse_intervals(&sendcmd->intervals, &sendcmd->nb_intervals,
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sendcmd->commands_str, ctx)) < 0)
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return ret;
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qsort(sendcmd->intervals, sendcmd->nb_intervals, sizeof(Interval), cmp_intervals);
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av_log(ctx, AV_LOG_DEBUG, "Parsed commands:\n");
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for (i = 0; i < sendcmd->nb_intervals; i++) {
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AVBPrint pbuf;
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Interval *interval = &sendcmd->intervals[i];
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av_log(ctx, AV_LOG_VERBOSE, "start_time:%f end_time:%f index:%d\n",
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(double)interval->start_ts/1000000, (double)interval->end_ts/1000000, interval->index);
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for (j = 0; j < interval->nb_commands; j++) {
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Command *cmd = &interval->commands[j];
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av_log(ctx, AV_LOG_VERBOSE,
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" [%s] target:%s command:%s arg:%s index:%d\n",
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make_command_flags_str(&pbuf, cmd->flags), cmd->target, cmd->command, cmd->arg, cmd->index);
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}
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}
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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SendCmdContext *sendcmd = ctx->priv;
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int i, j;
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for (i = 0; i < sendcmd->nb_intervals; i++) {
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Interval *interval = &sendcmd->intervals[i];
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for (j = 0; j < interval->nb_commands; j++) {
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Command *cmd = &interval->commands[j];
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av_free(cmd->target);
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av_free(cmd->command);
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av_free(cmd->arg);
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}
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av_free(interval->commands);
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}
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av_freep(&sendcmd->intervals);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *ref)
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{
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AVFilterContext *ctx = inlink->dst;
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SendCmdContext *sendcmd = ctx->priv;
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int64_t ts;
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int i, j, ret;
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if (ref->pts == AV_NOPTS_VALUE)
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goto end;
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ts = av_rescale_q(ref->pts, inlink->time_base, AV_TIME_BASE_Q);
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#define WITHIN_INTERVAL(ts, start_ts, end_ts) ((ts) >= (start_ts) && (ts) < (end_ts))
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for (i = 0; i < sendcmd->nb_intervals; i++) {
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Interval *interval = &sendcmd->intervals[i];
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int flags = 0;
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if (!interval->enabled && WITHIN_INTERVAL(ts, interval->start_ts, interval->end_ts)) {
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flags += COMMAND_FLAG_ENTER;
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interval->enabled = 1;
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}
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if (interval->enabled && !WITHIN_INTERVAL(ts, interval->start_ts, interval->end_ts)) {
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flags += COMMAND_FLAG_LEAVE;
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interval->enabled = 0;
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}
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if (flags) {
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AVBPrint pbuf;
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av_log(ctx, AV_LOG_VERBOSE,
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"[%s] interval #%d start_ts:%f end_ts:%f ts:%f\n",
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make_command_flags_str(&pbuf, flags), interval->index,
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(double)interval->start_ts/1000000, (double)interval->end_ts/1000000,
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(double)ts/1000000);
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for (j = 0; flags && j < interval->nb_commands; j++) {
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Command *cmd = &interval->commands[j];
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char buf[1024];
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if (cmd->flags & flags) {
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av_log(ctx, AV_LOG_VERBOSE,
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"Processing command #%d target:%s command:%s arg:%s\n",
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cmd->index, cmd->target, cmd->command, cmd->arg);
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ret = avfilter_graph_send_command(inlink->graph,
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cmd->target, cmd->command, cmd->arg,
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buf, sizeof(buf),
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AVFILTER_CMD_FLAG_ONE);
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av_log(ctx, AV_LOG_VERBOSE,
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"Command reply for command #%d: ret:%s res:%s\n",
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cmd->index, av_err2str(ret), buf);
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}
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}
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}
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}
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end:
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switch (inlink->type) {
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case AVMEDIA_TYPE_VIDEO:
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case AVMEDIA_TYPE_AUDIO:
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return ff_filter_frame(inlink->dst->outputs[0], ref);
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}
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return AVERROR(ENOSYS);
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}
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#if CONFIG_SENDCMD_FILTER
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#define sendcmd_options options
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AVFILTER_DEFINE_CLASS(sendcmd);
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static const AVFilterPad sendcmd_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad sendcmd_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_sendcmd = {
|
|
.name = "sendcmd",
|
|
.description = NULL_IF_CONFIG_SMALL("Send commands to filters."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(SendCmdContext),
|
|
.inputs = sendcmd_inputs,
|
|
.outputs = sendcmd_outputs,
|
|
.priv_class = &sendcmd_class,
|
|
};
|
|
|
|
#endif
|
|
|
|
#if CONFIG_ASENDCMD_FILTER
|
|
|
|
#define asendcmd_options options
|
|
AVFILTER_DEFINE_CLASS(asendcmd);
|
|
|
|
static const AVFilterPad asendcmd_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad asendcmd_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_af_asendcmd = {
|
|
.name = "asendcmd",
|
|
.description = NULL_IF_CONFIG_SMALL("Send commands to filters."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(SendCmdContext),
|
|
.inputs = asendcmd_inputs,
|
|
.outputs = asendcmd_outputs,
|
|
.priv_class = &asendcmd_class,
|
|
};
|
|
|
|
#endif
|