static int forward_status_change(AVFilterContext *filter, AVFilterLink *in)
{
unsigned out = 0, progress = 0;
int ret;
av_assert0(!in->status_out);
if (!filter->nb_outputs) {
/* not necessary with the current API and sinks */
return 0;
}
while (!in->status_out) {
if (!filter->outputs[out]->status_in) {
progress++;
ret = ff_request_frame_to_filter(filter->outputs[out]);
if (ret < 0)
return ret;
}
if (++out == filter->nb_outputs) {
if (!progress) {
/* Every output already closed: input no longer interesting
(example: overlay in shortest mode, other input closed). */
ff_avfilter_link_set_out_status(in, in->status_in, in->status_in_pts);
return 0;
}
progress = 0;
out = 0;
}
}
ff_filter_set_ready(filter, 200);
return 0;
}
int ff_filter_frame_to_filter(AVFilterLink *link)
{
AVFrame *frame;
AVFilterContext *dst = link->dst;
int ret;
av_assert1(ff_framequeue_queued_frames(&link->fifo));
if (link->min_samples) {
int min = link->min_samples;
if (link->status_in)
min = FFMIN(min, ff_framequeue_queued_samples(&link->fifo));
ret = take_samples(link, min, link->max_samples, &frame);
if (ret < 0)
return ret;
} else {
frame = ff_framequeue_take(&link->fifo);
}
/* The filter will soon have received a new frame, that may allow it to
produce one or more: unblock its outputs. */
filter_unblock(dst);
ret = ff_filter_frame_framed(link, frame);
if (ret < 0 && ret != link->status_out) {
ff_avfilter_link_set_out_status(link, ret, AV_NOPTS_VALUE);
} else {
/* Run once again, to see if several frames were available, or if
the input status has also changed, or any other reason. */
ff_filter_set_ready(dst, 300);
}
return ret;
}
void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
{
av_assert0(!link->frame_wanted_out);
av_assert0(!link->status_out);
link->status_out = status;
if (pts != AV_NOPTS_VALUE)
ff_update_link_current_pts(link, pts);
filter_unblock(link->dst);
ff_filter_set_ready(link->src, 200);
}
static int activate(AVFilterContext *ctx)
{
FPSContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
int ret;
int again = 0;
int64_t status_pts;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
/* No buffered status: normal operation */
if (!s->status) {
/* Read available input frames if we have room */
while (s->frames_count < 2 && ff_inlink_check_available_frame(inlink)) {
ret = read_frame(ctx, s, inlink, outlink);
if (ret < 0)
return ret;
}
/* We do not yet have enough frames to produce output */
if (s->frames_count < 2) {
/* Check if we've hit EOF (or otherwise that an error status is set) */
ret = ff_inlink_acknowledge_status(inlink, &s->status, &status_pts);
if (ret > 0)
update_eof_pts(ctx, s, inlink, outlink, status_pts);
if (!ret) {
/* If someone wants us to output, we'd better ask for more input */
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return 0;
}
}
}
/* Buffered frames are available, so generate an output frame */
if (s->frames_count > 0) {
ret = write_frame(ctx, s, outlink, &again);
/* Couldn't generate a frame, so schedule us to perform another step */
if (again)
ff_filter_set_ready(ctx, 100);
return ret;
}
/* No frames left, so forward the status */
if (s->status && s->frames_count == 0) {
ff_outlink_set_status(outlink, s->status, s->next_pts);
return 0;
}
return FFERROR_NOT_READY;
}
void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
{
if (link->status_in == status)
return;
av_assert0(!link->status_in);
link->status_in = status;
link->status_in_pts = pts;
link->frame_wanted_out = 0;
link->frame_blocked_in = 0;
filter_unblock(link->dst);
ff_filter_set_ready(link->dst, 200);
}
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
{
int ret;
FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
/* Consistency checks */
if (link->type == AVMEDIA_TYPE_VIDEO) {
if (strcmp(link->dst->filter->name, "buffersink") &&
strcmp(link->dst->filter->name, "format") &&
strcmp(link->dst->filter->name, "idet") &&
strcmp(link->dst->filter->name, "null") &&
strcmp(link->dst->filter->name, "scale")) {
av_assert1(frame->format == link->format);
av_assert1(frame->width == link->w);
av_assert1(frame->height == link->h);
}
} else {
if (frame->format != link->format) {
av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
goto error;
}
if (av_frame_get_channels(frame) != link->channels) {
av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
goto error;
}
if (frame->channel_layout != link->channel_layout) {
av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
goto error;
}
if (frame->sample_rate != link->sample_rate) {
av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
goto error;
}
}
link->frame_blocked_in = link->frame_wanted_out = 0;
link->frame_count_in++;
filter_unblock(link->dst);
ret = ff_framequeue_add(&link->fifo, frame);
if (ret < 0) {
av_frame_free(&frame);
return ret;
}
ff_filter_set_ready(link->dst, 300);
return 0;
error:
av_frame_free(&frame);
return AVERROR_PATCHWELCOME;
}
int ff_request_frame(AVFilterLink *link)
{
FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
if (link->status_out)
return link->status_out;
if (link->status_in) {
if (ff_framequeue_queued_frames(&link->fifo)) {
av_assert1(!link->frame_wanted_out);
av_assert1(link->dst->ready >= 300);
return 0;
} else {
/* Acknowledge status change. Filters using ff_request_frame() will
handle the change automatically. Filters can also check the
status directly but none do yet. */
ff_avfilter_link_set_out_status(link, link->status_in, link->status_in_pts);
return link->status_out;
}
}
link->frame_wanted_out = 1;
ff_filter_set_ready(link->src, 100);
return 0;
}
static int activate(AVFilterContext *ctx)
{
AudioFIRContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
int ret, status, available, wanted;
AVFrame *in = NULL;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
if (s->response)
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[1], ctx);
if (!s->eof_coeffs) {
AVFrame *ir = NULL;
ret = check_ir(ctx->inputs[1], ir);
if (ret < 0)
return ret;
if (ff_outlink_get_status(ctx->inputs[1]) == AVERROR_EOF)
s->eof_coeffs = 1;
if (!s->eof_coeffs) {
if (ff_outlink_frame_wanted(ctx->outputs[0]))
ff_inlink_request_frame(ctx->inputs[1]);
else if (s->response && ff_outlink_frame_wanted(ctx->outputs[1]))
ff_inlink_request_frame(ctx->inputs[1]);
return 0;
}
}
if (!s->have_coeffs && s->eof_coeffs) {
ret = convert_coeffs(ctx);
if (ret < 0)
return ret;
}
available = ff_inlink_queued_samples(ctx->inputs[0]);
wanted = FFMAX(s->min_part_size, (available / s->min_part_size) * s->min_part_size);
ret = ff_inlink_consume_samples(ctx->inputs[0], wanted, wanted, &in);
if (ret > 0)
ret = fir_frame(s, in, outlink);
if (ret < 0)
return ret;
if (s->response && s->have_coeffs) {
int64_t old_pts = s->video->pts;
int64_t new_pts = av_rescale_q(s->pts, ctx->inputs[0]->time_base, ctx->outputs[1]->time_base);
if (ff_outlink_frame_wanted(ctx->outputs[1]) && old_pts < new_pts) {
s->video->pts = new_pts;
return ff_filter_frame(ctx->outputs[1], av_frame_clone(s->video));
}
}
if (ff_inlink_queued_samples(ctx->inputs[0]) >= s->min_part_size) {
ff_filter_set_ready(ctx, 10);
return 0;
}
if (ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
if (status == AVERROR_EOF) {
ff_outlink_set_status(ctx->outputs[0], status, pts);
if (s->response)
ff_outlink_set_status(ctx->outputs[1], status, pts);
return 0;
}
}
if (ff_outlink_frame_wanted(ctx->outputs[0]) &&
!ff_outlink_get_status(ctx->inputs[0])) {
ff_inlink_request_frame(ctx->inputs[0]);
return 0;
}
if (s->response &&
ff_outlink_frame_wanted(ctx->outputs[1]) &&
!ff_outlink_get_status(ctx->inputs[0])) {
ff_inlink_request_frame(ctx->inputs[0]);
return 0;
}
return FFERROR_NOT_READY;
}
