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FFmpeg/libavfilter/avf_concat.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

464 lines
16 KiB
C

/*
* Copyright (c) 2012 Nicolas George
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* concat audio-video filter
*/
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "audio.h"
#define TYPE_ALL 2
typedef struct ConcatContext {
const AVClass *class;
unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
unsigned nb_segments;
unsigned cur_idx; /**< index of the first input of current segment */
int64_t delta_ts; /**< timestamp to add to produce output timestamps */
unsigned nb_in_active; /**< number of active inputs in current segment */
unsigned unsafe;
struct concat_in {
int64_t pts;
int64_t nb_frames;
unsigned eof;
} *in;
} ConcatContext;
#define OFFSET(x) offsetof(ConcatContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define F AV_OPT_FLAG_FILTERING_PARAM
#define V AV_OPT_FLAG_VIDEO_PARAM
static const AVOption concat_options[] = {
{ "n", "specify the number of segments", OFFSET(nb_segments),
AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
{ "v", "specify the number of video streams",
OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
{ "a", "specify the number of audio streams",
OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
{ "unsafe", "enable unsafe mode",
OFFSET(unsafe),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
{ NULL }
};
AVFILTER_DEFINE_CLASS(concat);
static int query_formats(AVFilterContext *ctx)
{
ConcatContext *cat = ctx->priv;
unsigned type, nb_str, idx0 = 0, idx, str, seg;
AVFilterFormats *formats, *rates = NULL;
AVFilterChannelLayouts *layouts = NULL;
int ret;
for (type = 0; type < TYPE_ALL; type++) {
nb_str = cat->nb_streams[type];
for (str = 0; str < nb_str; str++) {
idx = idx0;
/* Set the output formats */
formats = ff_all_formats(type);
if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->incfg.formats)) < 0)
return ret;
if (type == AVMEDIA_TYPE_AUDIO) {
rates = ff_all_samplerates();
if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->incfg.samplerates)) < 0)
return ret;
layouts = ff_all_channel_layouts();
if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->incfg.channel_layouts)) < 0)
return ret;
}
/* Set the same formats for each corresponding input */
for (seg = 0; seg < cat->nb_segments; seg++) {
if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->outcfg.formats)) < 0)
return ret;
if (type == AVMEDIA_TYPE_AUDIO) {
if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->outcfg.samplerates)) < 0 ||
(ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->outcfg.channel_layouts)) < 0)
return ret;
}
idx += ctx->nb_outputs;
}
idx0++;
}
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ConcatContext *cat = ctx->priv;
unsigned out_no = FF_OUTLINK_IDX(outlink);
unsigned in_no = out_no, seg;
AVFilterLink *inlink = ctx->inputs[in_no];
/* enhancement: find a common one */
outlink->time_base = AV_TIME_BASE_Q;
outlink->w = inlink->w;
outlink->h = inlink->h;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->format = inlink->format;
outlink->frame_rate = inlink->frame_rate;
for (seg = 1; seg < cat->nb_segments; seg++) {
inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
if (outlink->frame_rate.num != inlink->frame_rate.num ||
outlink->frame_rate.den != inlink->frame_rate.den) {
av_log(ctx, AV_LOG_VERBOSE,
"Video inputs have different frame rates, output will be VFR\n");
outlink->frame_rate = av_make_q(1, 0);
break;
}
}
for (seg = 1; seg < cat->nb_segments; seg++) {
inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
if (!outlink->sample_aspect_ratio.num)
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
/* possible enhancement: unsafe mode, do not check */
if (outlink->w != inlink->w ||
outlink->h != inlink->h ||
outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
inlink->sample_aspect_ratio.num ||
outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
"(size %dx%d, SAR %d:%d) do not match the corresponding "
"output link %s parameters (%dx%d, SAR %d:%d)\n",
ctx->input_pads[in_no].name, inlink->w, inlink->h,
inlink->sample_aspect_ratio.num,
inlink->sample_aspect_ratio.den,
ctx->input_pads[out_no].name, outlink->w, outlink->h,
outlink->sample_aspect_ratio.num,
outlink->sample_aspect_ratio.den);
if (!cat->unsafe)
return AVERROR(EINVAL);
}
}
return 0;
}
static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
{
ConcatContext *cat = ctx->priv;
unsigned out_no = in_no % ctx->nb_outputs;
AVFilterLink * inlink = ctx-> inputs[ in_no];
AVFilterLink *outlink = ctx->outputs[out_no];
struct concat_in *in = &cat->in[in_no];
buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
buf->duration = av_rescale_q(buf->duration, inlink->time_base, outlink->time_base);
in->pts = buf->pts;
in->nb_frames++;
/* add duration to input PTS */
if (inlink->sample_rate)
/* use number of audio samples */
in->pts += av_rescale_q(buf->nb_samples,
av_make_q(1, inlink->sample_rate),
outlink->time_base);
else if (in->nb_frames >= 2)
/* use mean duration */
in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
buf->pts += cat->delta_ts;
return ff_filter_frame(outlink, buf);
}
static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
{
AVFilterContext *ctx = inlink->dst;
unsigned in_no = FF_INLINK_IDX(inlink);
AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
return ff_get_video_buffer(outlink, w, h);
}
static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
{
AVFilterContext *ctx = inlink->dst;
unsigned in_no = FF_INLINK_IDX(inlink);
AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
return ff_get_audio_buffer(outlink, nb_samples);
}
static void close_input(AVFilterContext *ctx, unsigned in_no)
{
ConcatContext *cat = ctx->priv;
cat->in[in_no].eof = 1;
cat->nb_in_active--;
av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
ctx->input_pads[in_no].name, cat->nb_in_active);
}
static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
{
ConcatContext *cat = ctx->priv;
unsigned i = cat->cur_idx;
unsigned imax = i + ctx->nb_outputs;
int64_t pts;
pts = cat->in[i++].pts;
for (; i < imax; i++)
pts = FFMAX(pts, cat->in[i].pts);
cat->delta_ts += pts;
*seg_delta = pts;
}
static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
int64_t seg_delta)
{
ConcatContext *cat = ctx->priv;
AVFilterLink *outlink = ctx->outputs[out_no];
int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
int64_t nb_samples, sent = 0;
int frame_nb_samples, ret;
AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
AVFrame *buf;
if (!rate_tb.den)
return AVERROR_BUG;
if (cat->in[in_no].pts < INT64_MIN + seg_delta)
return AVERROR_INVALIDDATA;
if (seg_delta < cat->in[in_no].pts)
return AVERROR_INVALIDDATA;
nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
outlink->time_base, rate_tb);
frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
while (nb_samples) {
frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
buf = ff_get_audio_buffer(outlink, frame_nb_samples);
if (!buf)
return AVERROR(ENOMEM);
av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
outlink->ch_layout.nb_channels, outlink->format);
buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
ret = ff_filter_frame(outlink, buf);
if (ret < 0)
return ret;
sent += frame_nb_samples;
nb_samples -= frame_nb_samples;
}
return 0;
}
static int flush_segment(AVFilterContext *ctx)
{
int ret;
ConcatContext *cat = ctx->priv;
unsigned str, str_max;
int64_t seg_delta;
find_next_delta_ts(ctx, &seg_delta);
cat->cur_idx += ctx->nb_outputs;
cat->nb_in_active = ctx->nb_outputs;
av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
cat->delta_ts);
if (cat->cur_idx < ctx->nb_inputs) {
/* pad audio streams with silence */
str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
for (; str < str_max; str++) {
ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
seg_delta);
if (ret < 0)
return ret;
}
}
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
ConcatContext *cat = ctx->priv;
unsigned seg, type, str;
int ret;
/* create input pads */
for (seg = 0; seg < cat->nb_segments; seg++) {
for (type = 0; type < TYPE_ALL; type++) {
for (str = 0; str < cat->nb_streams[type]; str++) {
AVFilterPad pad = {
.type = type,
};
if (type == AVMEDIA_TYPE_VIDEO)
pad.get_buffer.video = get_video_buffer;
else
pad.get_buffer.audio = get_audio_buffer;
pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
return ret;
}
}
}
/* create output pads */
for (type = 0; type < TYPE_ALL; type++) {
for (str = 0; str < cat->nb_streams[type]; str++) {
AVFilterPad pad = {
.type = type,
.config_props = config_output,
};
pad.name = av_asprintf("out:%c%d", "va"[type], str);
if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
return ret;
}
}
cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
if (!cat->in)
return AVERROR(ENOMEM);
cat->nb_in_active = ctx->nb_outputs;
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ConcatContext *cat = ctx->priv;
av_freep(&cat->in);
}
static int activate(AVFilterContext *ctx)
{
ConcatContext *cat = ctx->priv;
AVFrame *frame;
unsigned i, j;
int ret, status;
int64_t pts;
/* Forward status back */
for (i = 0; i < ctx->nb_outputs; i++) {
status = ff_outlink_get_status(ctx->outputs[i]);
if (!status)
continue;
for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
if (!cat->in[j].eof) {
cat->in[j].eof = 1;
ff_inlink_set_status(ctx->inputs[j], status);
return 0;
}
}
}
/* Forward available frames */
if (cat->cur_idx < ctx->nb_inputs) {
for (i = 0; i < ctx->nb_outputs; i++) {
ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
if (ret < 0)
return ret;
if (ret) {
ff_filter_set_ready(ctx, 10);
return push_frame(ctx, cat->cur_idx + i, frame);
}
}
}
/* Forward status change */
if (cat->cur_idx < ctx->nb_inputs) {
for (i = 0; i < ctx->nb_outputs; i++) {
AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
ret = ff_inlink_acknowledge_status(inlink, &status, &pts);
/* TODO use pts */
if (ret > 0) {
close_input(ctx, cat->cur_idx + i);
if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
int64_t eof_pts = cat->delta_ts;
eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
}
if (!cat->nb_in_active) {
ret = flush_segment(ctx);
if (ret < 0)
return ret;
}
ff_filter_set_ready(ctx, 10);
return 0;
}
}
}
ret = FFERROR_NOT_READY;
for (i = 0; i < ctx->nb_outputs; i++) {
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
if (cat->in[cat->cur_idx + i].eof) {
for (j = 0; j < ctx->nb_outputs; j++)
if (!cat->in[cat->cur_idx + j].eof)
ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
return 0;
} else {
ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
ret = 0;
}
}
}
return ret;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret = AVERROR(ENOSYS);
if (!strcmp(cmd, "next")) {
av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
return flush_segment(ctx);
}
return ret;
}
const AVFilter ff_avf_concat = {
.name = "concat",
.description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
.init = init,
.uninit = uninit,
.activate = activate,
.priv_size = sizeof(ConcatContext),
.inputs = NULL,
.outputs = NULL,
.priv_class = &concat_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
FILTER_QUERY_FUNC(query_formats),
.process_command = process_command,
};