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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavfilter/af_amerge.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

356 lines
11 KiB
C

/*
* Copyright (c) 2011 Nicolas George <nicolas.george@normalesup.org>
*
* 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
* Audio merging filter
*/
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "audio.h"
#include "formats.h"
#include "internal.h"
#define SWR_CH_MAX 64
typedef struct AMergeContext {
const AVClass *class;
int nb_inputs;
int route[SWR_CH_MAX]; /**< channels routing, see copy_samples */
int bps;
struct amerge_input {
int nb_ch; /**< number of channels for the input */
} *in;
} AMergeContext;
#define OFFSET(x) offsetof(AMergeContext, x)
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption amerge_options[] = {
{ "inputs", "specify the number of inputs", OFFSET(nb_inputs),
AV_OPT_TYPE_INT, { .i64 = 2 }, 1, SWR_CH_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(amerge);
static av_cold void uninit(AVFilterContext *ctx)
{
AMergeContext *s = ctx->priv;
av_freep(&s->in);
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVSampleFormat packed_sample_fmts[] = {
AV_SAMPLE_FMT_U8,
AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_S32,
AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_DBL,
AV_SAMPLE_FMT_NONE
};
AMergeContext *s = ctx->priv;
AVChannelLayout *inlayout[SWR_CH_MAX] = { NULL }, outlayout = { 0 };
uint64_t outmask = 0;
AVFilterChannelLayouts *layouts;
int i, ret, overlap = 0, nb_ch = 0;
for (i = 0; i < s->nb_inputs; i++) {
if (!ctx->inputs[i]->incfg.channel_layouts ||
!ctx->inputs[i]->incfg.channel_layouts->nb_channel_layouts) {
av_log(ctx, AV_LOG_WARNING,
"No channel layout for input %d\n", i + 1);
return AVERROR(EAGAIN);
}
inlayout[i] = &ctx->inputs[i]->incfg.channel_layouts->channel_layouts[0];
if (ctx->inputs[i]->incfg.channel_layouts->nb_channel_layouts > 1) {
char buf[256];
av_channel_layout_describe(inlayout[i], buf, sizeof(buf));
av_log(ctx, AV_LOG_INFO, "Using \"%s\" for input %d\n", buf, i + 1);
}
s->in[i].nb_ch = FF_LAYOUT2COUNT(inlayout[i]);
if (s->in[i].nb_ch) {
overlap++;
} else {
s->in[i].nb_ch = inlayout[i]->nb_channels;
if (av_channel_layout_subset(inlayout[i], outmask))
overlap++;
outmask |= inlayout[i]->order == AV_CHANNEL_ORDER_NATIVE ?
inlayout[i]->u.mask : 0;
}
nb_ch += s->in[i].nb_ch;
}
if (nb_ch > SWR_CH_MAX) {
av_log(ctx, AV_LOG_ERROR, "Too many channels (max %d)\n", SWR_CH_MAX);
return AVERROR(EINVAL);
}
if (overlap) {
av_log(ctx, AV_LOG_WARNING,
"Input channel layouts overlap: "
"output layout will be determined by the number of distinct input channels\n");
for (i = 0; i < nb_ch; i++)
s->route[i] = i;
av_channel_layout_default(&outlayout, nb_ch);
if (!KNOWN(&outlayout) && nb_ch)
av_channel_layout_from_mask(&outlayout, 0xFFFFFFFFFFFFFFFFULL >> (64 - nb_ch));
} else {
int *route[SWR_CH_MAX];
int c, out_ch_number = 0;
av_channel_layout_from_mask(&outlayout, outmask);
route[0] = s->route;
for (i = 1; i < s->nb_inputs; i++)
route[i] = route[i - 1] + s->in[i - 1].nb_ch;
for (c = 0; c < 64; c++)
for (i = 0; i < s->nb_inputs; i++)
if (av_channel_layout_index_from_channel(inlayout[i], c) >= 0)
*(route[i]++) = out_ch_number++;
}
if ((ret = ff_set_common_formats_from_list(ctx, packed_sample_fmts)) < 0)
return ret;
for (i = 0; i < s->nb_inputs; i++) {
layouts = NULL;
if ((ret = ff_add_channel_layout(&layouts, inlayout[i])) < 0)
return ret;
if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
return ret;
}
layouts = NULL;
if ((ret = ff_add_channel_layout(&layouts, &outlayout)) < 0)
return ret;
if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
return ret;
return ff_set_common_all_samplerates(ctx);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AMergeContext *s = ctx->priv;
AVBPrint bp;
int i;
s->bps = av_get_bytes_per_sample(outlink->format);
outlink->time_base = ctx->inputs[0]->time_base;
av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
for (i = 0; i < s->nb_inputs; i++) {
av_bprintf(&bp, "%sin%d:", i ? " + " : "", i);
av_channel_layout_describe_bprint(&ctx->inputs[i]->ch_layout, &bp);
}
av_bprintf(&bp, " -> out:");
av_channel_layout_describe_bprint(&outlink->ch_layout, &bp);
av_log(ctx, AV_LOG_VERBOSE, "%s\n", bp.str);
return 0;
}
/**
* Copy samples from several input streams to one output stream.
* @param nb_inputs number of inputs
* @param in inputs; used only for the nb_ch field;
* @param route routing values;
* input channel i goes to output channel route[i];
* i < in[0].nb_ch are the channels from the first output;
* i >= in[0].nb_ch are the channels from the second output
* @param ins pointer to the samples of each inputs, in packed format;
* will be left at the end of the copied samples
* @param outs pointer to the samples of the output, in packet format;
* must point to a buffer big enough;
* will be left at the end of the copied samples
* @param ns number of samples to copy
* @param bps bytes per sample
*/
static inline void copy_samples(int nb_inputs, struct amerge_input in[],
int *route, uint8_t *ins[],
uint8_t **outs, int ns, int bps)
{
int *route_cur;
int i, c, nb_ch = 0;
for (i = 0; i < nb_inputs; i++)
nb_ch += in[i].nb_ch;
while (ns--) {
route_cur = route;
for (i = 0; i < nb_inputs; i++) {
for (c = 0; c < in[i].nb_ch; c++) {
memcpy((*outs) + bps * *(route_cur++), ins[i], bps);
ins[i] += bps;
}
}
*outs += nb_ch * bps;
}
}
static void free_frames(int nb_inputs, AVFrame **input_frames)
{
int i;
for (i = 0; i < nb_inputs; i++)
av_frame_free(&input_frames[i]);
}
static int try_push_frame(AVFilterContext *ctx, int nb_samples)
{
AMergeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
int i, ret;
AVFrame *outbuf, *inbuf[SWR_CH_MAX] = { NULL };
uint8_t *outs, *ins[SWR_CH_MAX];
for (i = 0; i < ctx->nb_inputs; i++) {
ret = ff_inlink_consume_samples(ctx->inputs[i], nb_samples, nb_samples, &inbuf[i]);
if (ret < 0) {
free_frames(i, inbuf);
return ret;
}
ins[i] = inbuf[i]->data[0];
}
outbuf = ff_get_audio_buffer(outlink, nb_samples);
if (!outbuf) {
free_frames(s->nb_inputs, inbuf);
return AVERROR(ENOMEM);
}
outs = outbuf->data[0];
outbuf->pts = inbuf[0]->pts;
outbuf->nb_samples = nb_samples;
outbuf->duration = av_rescale_q(outbuf->nb_samples,
av_make_q(1, outlink->sample_rate),
outlink->time_base);
if ((ret = av_channel_layout_copy(&outbuf->ch_layout, &outlink->ch_layout)) < 0)
return ret;
while (nb_samples) {
/* Unroll the most common sample formats: speed +~350% for the loop,
+~13% overall (including two common decoders) */
switch (s->bps) {
case 1:
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 1);
break;
case 2:
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 2);
break;
case 4:
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 4);
break;
default:
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, s->bps);
break;
}
nb_samples = 0;
}
free_frames(s->nb_inputs, inbuf);
return ff_filter_frame(outlink, outbuf);
}
static int activate(AVFilterContext *ctx)
{
int i, status;
int ret, nb_samples;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
nb_samples = ff_inlink_queued_samples(ctx->inputs[0]);
for (i = 1; i < ctx->nb_inputs && nb_samples > 0; i++) {
nb_samples = FFMIN(ff_inlink_queued_samples(ctx->inputs[i]), nb_samples);
}
if (nb_samples) {
ret = try_push_frame(ctx, nb_samples);
if (ret < 0)
return ret;
}
for (i = 0; i < ctx->nb_inputs; i++) {
if (ff_inlink_queued_samples(ctx->inputs[i]))
continue;
if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) {
ff_outlink_set_status(ctx->outputs[0], status, pts);
return 0;
} else if (ff_outlink_frame_wanted(ctx->outputs[0])) {
ff_inlink_request_frame(ctx->inputs[i]);
return 0;
}
}
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
AMergeContext *s = ctx->priv;
int i, ret;
s->in = av_calloc(s->nb_inputs, sizeof(*s->in));
if (!s->in)
return AVERROR(ENOMEM);
for (i = 0; i < s->nb_inputs; i++) {
char *name = av_asprintf("in%d", i);
AVFilterPad pad = {
.name = name,
.type = AVMEDIA_TYPE_AUDIO,
};
if (!name)
return AVERROR(ENOMEM);
if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
return ret;
}
return 0;
}
static const AVFilterPad amerge_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_output,
},
};
const AVFilter ff_af_amerge = {
.name = "amerge",
.description = NULL_IF_CONFIG_SMALL("Merge two or more audio streams into "
"a single multi-channel stream."),
.priv_size = sizeof(AMergeContext),
.init = init,
.uninit = uninit,
.activate = activate,
.inputs = NULL,
FILTER_OUTPUTS(amerge_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &amerge_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};