This source file includes following definitions.
- process_frame
- activate
- config_output
- parse_definition
- parse_mapping
- process_command
- init
- uninit
- query_formats
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
typedef struct StreamSelectContext {
const AVClass *class;
int nb_inputs;
char *map_str;
int *map;
int nb_map;
int is_audio;
int64_t *last_pts;
AVFrame **frames;
FFFrameSync fs;
} StreamSelectContext;
#define OFFSET(x) offsetof(StreamSelectContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption streamselect_options[] = {
{ "inputs", "number of input streams", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags=FLAGS },
{ "map", "input indexes to remap to outputs", OFFSET(map_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags=TFLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(streamselect);
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
StreamSelectContext *s = fs->opaque;
AVFrame **in = s->frames;
int i, j, ret = 0, have_out = 0;
for (i = 0; i < ctx->nb_inputs; i++) {
if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
return ret;
}
for (j = 0; j < ctx->nb_inputs; j++) {
for (i = 0; i < s->nb_map; i++) {
if (s->map[i] == j) {
AVFrame *out;
if (s->is_audio && s->last_pts[j] == in[j]->pts &&
ctx->outputs[i]->frame_count_in > 0)
continue;
out = av_frame_clone(in[j]);
if (!out)
return AVERROR(ENOMEM);
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, ctx->outputs[i]->time_base);
s->last_pts[j] = in[j]->pts;
ret = ff_filter_frame(ctx->outputs[i], out);
have_out = 1;
if (ret < 0)
return ret;
}
}
}
if (!have_out)
ff_filter_set_ready(ctx, 100);
return ret;
}
static int activate(AVFilterContext *ctx)
{
StreamSelectContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
StreamSelectContext *s = ctx->priv;
const int outlink_idx = FF_OUTLINK_IDX(outlink);
const int inlink_idx = s->map[outlink_idx];
AVFilterLink *inlink = ctx->inputs[inlink_idx];
FFFrameSyncIn *in;
int i, ret;
av_log(ctx, AV_LOG_VERBOSE, "config output link %d "
"with settings from input link %d\n",
outlink_idx, inlink_idx);
switch (outlink->type) {
case AVMEDIA_TYPE_VIDEO:
outlink->w = inlink->w;
outlink->h = inlink->h;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->frame_rate = inlink->frame_rate;
break;
case AVMEDIA_TYPE_AUDIO:
outlink->sample_rate = inlink->sample_rate;
outlink->channels = inlink->channels;
outlink->channel_layout = inlink->channel_layout;
break;
}
outlink->time_base = inlink->time_base;
outlink->format = inlink->format;
if (s->fs.opaque == s)
return 0;
if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0)
return ret;
in = s->fs.in;
s->fs.opaque = s;
s->fs.on_event = process_frame;
for (i = 0; i < ctx->nb_inputs; i++) {
in[i].time_base = ctx->inputs[i]->time_base;
in[i].sync = 1;
in[i].before = EXT_STOP;
in[i].after = EXT_STOP;
}
s->frames = av_calloc(ctx->nb_inputs, sizeof(*s->frames));
if (!s->frames)
return AVERROR(ENOMEM);
return ff_framesync_configure(&s->fs);
}
static int parse_definition(AVFilterContext *ctx, int nb_pads, int is_input, int is_audio)
{
const char *padtype = is_input ? "in" : "out";
int i = 0, ret = 0;
for (i = 0; i < nb_pads; i++) {
AVFilterPad pad = { 0 };
pad.type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
pad.name = av_asprintf("%sput%d", padtype, i);
if (!pad.name)
return AVERROR(ENOMEM);
av_log(ctx, AV_LOG_DEBUG, "Add %s pad %s\n", padtype, pad.name);
if (is_input) {
ret = ff_insert_inpad(ctx, i, &pad);
} else {
pad.config_props = config_output;
ret = ff_insert_outpad(ctx, i, &pad);
}
if (ret < 0) {
av_freep(&pad.name);
return ret;
}
}
return 0;
}
static int parse_mapping(AVFilterContext *ctx, const char *map)
{
StreamSelectContext *s = ctx->priv;
int *new_map;
int new_nb_map = 0;
if (!map) {
av_log(ctx, AV_LOG_ERROR, "mapping definition is not set\n");
return AVERROR(EINVAL);
}
new_map = av_calloc(s->nb_inputs, sizeof(*new_map));
if (!new_map)
return AVERROR(ENOMEM);
while (1) {
char *p;
const int n = strtol(map, &p, 0);
av_log(ctx, AV_LOG_DEBUG, "n=%d map=%p p=%p\n", n, map, p);
if (map == p)
break;
map = p;
if (new_nb_map >= s->nb_inputs) {
av_log(ctx, AV_LOG_ERROR, "Unable to map more than the %d "
"input pads available\n", s->nb_inputs);
av_free(new_map);
return AVERROR(EINVAL);
}
if (n < 0 || n >= ctx->nb_inputs) {
av_log(ctx, AV_LOG_ERROR, "Input stream index %d doesn't exist "
"(there is only %d input streams defined)\n",
n, s->nb_inputs);
av_free(new_map);
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_VERBOSE, "Map input stream %d to output stream %d\n", n, new_nb_map);
new_map[new_nb_map++] = n;
}
if (!new_nb_map) {
av_log(ctx, AV_LOG_ERROR, "invalid mapping\n");
av_free(new_map);
return AVERROR(EINVAL);
}
av_freep(&s->map);
s->map = new_map;
s->nb_map = new_nb_map;
av_log(ctx, AV_LOG_VERBOSE, "%d map set\n", s->nb_map);
return 0;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
if (!strcmp(cmd, "map")) {
int ret = parse_mapping(ctx, args);
if (ret < 0)
return ret;
return avfilter_config_links(ctx);
}
return AVERROR(ENOSYS);
}
static av_cold int init(AVFilterContext *ctx)
{
StreamSelectContext *s = ctx->priv;
int ret, nb_outputs = 0;
char *map = s->map_str;
if (!strcmp(ctx->filter->name, "astreamselect"))
s->is_audio = 1;
for (; map;) {
char *p;
strtol(map, &p, 0);
if (map == p)
break;
nb_outputs++;
map = p;
}
s->last_pts = av_calloc(s->nb_inputs, sizeof(*s->last_pts));
if (!s->last_pts)
return AVERROR(ENOMEM);
if ((ret = parse_definition(ctx, s->nb_inputs, 1, s->is_audio)) < 0 ||
(ret = parse_definition(ctx, nb_outputs, 0, s->is_audio)) < 0)
return ret;
av_log(ctx, AV_LOG_DEBUG, "Configured with %d inpad and %d outpad\n",
ctx->nb_inputs, ctx->nb_outputs);
return parse_mapping(ctx, s->map_str);
}
static av_cold void uninit(AVFilterContext *ctx)
{
StreamSelectContext *s = ctx->priv;
av_freep(&s->last_pts);
av_freep(&s->map);
av_freep(&s->frames);
ff_framesync_uninit(&s->fs);
for (int i = 0; i < ctx->nb_inputs; i++)
av_freep(&ctx->input_pads[i].name);
for (int i = 0; i < ctx->nb_outputs; i++)
av_freep(&ctx->output_pads[i].name);
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats, *rates = NULL;
AVFilterChannelLayouts *layouts = NULL;
int ret, i;
for (i = 0; i < ctx->nb_inputs; i++) {
formats = ff_all_formats(ctx->inputs[i]->type);
if ((ret = ff_set_common_formats(ctx, formats)) < 0)
return ret;
if (ctx->inputs[i]->type == AVMEDIA_TYPE_AUDIO) {
rates = ff_all_samplerates();
if ((ret = ff_set_common_samplerates(ctx, rates)) < 0)
return ret;
layouts = ff_all_channel_counts();
if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
return ret;
}
}
return 0;
}
AVFilter ff_vf_streamselect = {
.name = "streamselect",
.description = NULL_IF_CONFIG_SMALL("Select video streams"),
.init = init,
.query_formats = query_formats,
.process_command = process_command,
.uninit = uninit,
.activate = activate,
.priv_size = sizeof(StreamSelectContext),
.priv_class = &streamselect_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};
#define astreamselect_options streamselect_options
AVFILTER_DEFINE_CLASS(astreamselect);
AVFilter ff_af_astreamselect = {
.name = "astreamselect",
.description = NULL_IF_CONFIG_SMALL("Select audio streams"),
.init = init,
.query_formats = query_formats,
.process_command = process_command,
.uninit = uninit,
.activate = activate,
.priv_size = sizeof(StreamSelectContext),
.priv_class = &astreamselect_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};