int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
{
BufferSinkContext *buf = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret;
AVFrame *cur_frame;
/* no picref available, fetch it from the filterchain */
if (!av_fifo_size(buf->fifo)) {
if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
return AVERROR(EAGAIN);
if ((ret = ff_request_frame(inlink)) < 0)
return ret;
}
if (!av_fifo_size(buf->fifo))
return AVERROR(EINVAL);
if (flags & AV_BUFFERSINK_FLAG_PEEK) {
cur_frame = *((AVFrame **)av_fifo_peek2(buf->fifo, 0));
av_frame_ref(frame, cur_frame); /* TODO check failure */
} else {
av_fifo_generic_read(buf->fifo, &cur_frame, sizeof(cur_frame), NULL);
av_frame_move_ref(frame, cur_frame);
av_frame_free(&cur_frame);
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
MixContext *s = ctx->priv;
int ret;
int wanted_samples;
ret = calc_active_inputs(s);
if (ret < 0)
return ret;
if (!(s->input_state[0] & INPUT_ON))
return request_samples(ctx, 1);
if (s->frame_list->nb_frames == 0) {
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF) {
s->input_state[0] = 0;
if (s->nb_inputs == 1)
return AVERROR_EOF;
return output_frame(ctx->outputs[0]);
}
return ret;
}
av_assert0(s->frame_list->nb_frames > 0);
wanted_samples = frame_list_next_frame_size(s->frame_list);
return request_samples(ctx, wanted_samples);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AudioEchoContext *s = ctx->priv;
int ret;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && !ctx->is_disabled && s->fade_out) {
int nb_samples = FFMIN(s->fade_out, 2048);
AVFrame *frame;
frame = ff_get_audio_buffer(outlink, nb_samples);
if (!frame)
return AVERROR(ENOMEM);
s->fade_out -= nb_samples;
av_samples_set_silence(frame->extended_data, 0,
frame->nb_samples,
outlink->channels,
frame->format);
s->echo_samples(s, s->delayptrs, frame->data, frame->data,
frame->nb_samples, outlink->channels);
frame->pts = s->next_pts;
if (s->next_pts != AV_NOPTS_VALUE)
s->next_pts += av_rescale_q(nb_samples, (AVRational){1, outlink->sample_rate}, outlink->time_base);
return ff_filter_frame(outlink, frame);
}
return ret;
}
static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
IDETContext *idet = ctx->priv;
do {
int ret;
if (idet->eof)
return AVERROR_EOF;
ret = ff_request_frame(link->src->inputs[0]);
if (ret == AVERROR_EOF && idet->cur) {
AVFrame *next = av_frame_clone(idet->next);
if (!next)
return AVERROR(ENOMEM);
filter_frame(link->src->inputs[0], next);
idet->eof = 1;
} else if (ret < 0) {
return ret;
}
} while (!idet->cur);
return 0;
}
static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0);
AVFilterContext *ctx = inlink->dst;
OverlayContext *over = ctx->priv;
if (!outpicref)
return AVERROR(ENOMEM);
outpicref->pts = av_rescale_q(outpicref->pts, ctx->inputs[MAIN]->time_base,
ctx->outputs[0]->time_base);
if (!over->overpicref || over->overpicref->pts < outpicref->pts) {
AVFilterBufferRef *old = over->overpicref;
over->overpicref = NULL;
ff_request_frame(ctx->inputs[OVERLAY]);
if (over->overpicref) {
if (old)
avfilter_unref_buffer(old);
} else
over->overpicref = old;
}
return ff_start_frame(inlink->dst->outputs[0], outpicref);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ResampleContext *s = ctx->priv;
int ret = 0;
s->got_output = 0;
while (ret >= 0 && !s->got_output)
ret = ff_request_frame(ctx->inputs[0]);
/* flush the lavr delay buffer */
if (ret == AVERROR_EOF && s->avr) {
AVFrame *frame;
int nb_samples = avresample_get_out_samples(s->avr, 0);
if (!nb_samples)
return ret;
frame = ff_get_audio_buffer(outlink, nb_samples);
if (!frame)
return AVERROR(ENOMEM);
ret = avresample_convert(s->avr, frame->extended_data,
frame->linesize[0], nb_samples,
NULL, 0, 0);
if (ret <= 0) {
av_frame_free(&frame);
return (ret == 0) ? AVERROR_EOF : ret;
}
frame->pts = s->next_pts;
return ff_filter_frame(outlink, frame);
}
return ret;
}
static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
ASyncContext *s = ctx->priv;
int ret = 0;
int nb_samples;
s->got_output = 0;
while (ret >= 0 && !s->got_output)
ret = ff_request_frame(ctx->inputs[0]);
/* flush the fifo */
if (ret == AVERROR_EOF) {
if (s->first_pts != AV_NOPTS_VALUE)
handle_trimming(ctx);
if (nb_samples = get_delay(s)) {
AVFrame *buf = ff_get_audio_buffer(link, nb_samples);
if (!buf)
return AVERROR(ENOMEM);
ret = avresample_convert(s->avr, buf->extended_data,
buf->linesize[0], nb_samples, NULL, 0, 0);
if (ret <= 0) {
av_frame_free(&buf);
return (ret < 0) ? ret : AVERROR_EOF;
}
buf->pts = s->pts;
return ff_filter_frame(link, buf);
}
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
SoxContext *sox = outlink->dst->priv;
sox_effect_t *effect = sox->effect;
size_t out_nb_samples = 1024;
AVFrame *outsamples;
int ret;
ret = ff_request_frame(outlink->src->inputs[0]);
if (ret == AVERROR_EOF) {
/* drain cached samples */
while (0) {
outsamples =
ff_get_audio_buffer(outlink, out_nb_samples);
ret = effect->handler.drain(sox->effect,
(int32_t *)outsamples->data[0], &out_nb_samples);
outsamples->nb_samples = out_nb_samples / effect->out_signal.channels;
ff_filter_frame(outlink, outsamples);
if (ret == SOX_EOF)
break;
}
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ZPContext *s = ctx->priv;
AVFrame *in = s->in;
double zoom, dx, dy;
int ret;
if (in) {
ret = output_single_frame(ctx, in, s->var_values, s->current_frame,
&zoom, &dx, &dy);
if (ret < 0)
goto fail;
}
if (s->current_frame >= s->nb_frames) {
s->x = dx;
s->y = dy;
s->prev_zoom = zoom;
s->prev_nb_frames = s->nb_frames;
s->nb_frames = 0;
s->current_frame = 0;
av_frame_free(&s->in);
ret = 0;
s->finished = 1;
ret = ff_request_frame(ctx->inputs[0]);
}
fail:
sws_freeContext(s->sws);
s->sws = NULL;
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LADSPAContext *s = ctx->priv;
AVFrame *out;
int64_t t;
int i;
if (ctx->nb_inputs)
return ff_request_frame(ctx->inputs[0]);
t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
if (s->duration >= 0 && t >= s->duration)
return AVERROR_EOF;
out = ff_get_audio_buffer(outlink, s->nb_samples);
if (!out)
return AVERROR(ENOMEM);
for (i = 0; i < s->nb_outputs; i++)
s->desc->connect_port(s->handles[0], s->opmap[i],
(LADSPA_Data*)out->extended_data[i]);
s->desc->run(s->handles[0], s->nb_samples);
for (i = 0; i < s->nb_outputcontrols; i++)
print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1);
out->sample_rate = s->sample_rate;
out->pts = s->pts;
s->pts += s->nb_samples;
return ff_filter_frame(outlink, out);
}
static int arequest_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LoopContext *s = ctx->priv;
int ret = 0;
if ((!s->size) ||
(s->nb_samples < s->size) ||
(s->nb_samples >= s->size && s->loop == 0)) {
int nb_samples = av_audio_fifo_size(s->left);
if (s->loop == 0 && nb_samples > 0) {
AVFrame *out;
out = ff_get_audio_buffer(outlink, nb_samples);
if (!out)
return AVERROR(ENOMEM);
av_audio_fifo_read(s->left, (void **)out->extended_data, nb_samples);
out->pts = s->pts;
s->pts += nb_samples;
ret = ff_filter_frame(outlink, out);
if (ret < 0)
return ret;
}
ret = ff_request_frame(ctx->inputs[0]);
} else {
ret = push_samples(ctx, 1024);
}
if (ret == AVERROR_EOF && s->nb_samples > 0 && s->loop != 0) {
ret = push_samples(ctx, outlink->sample_rate);
}
return ret;
}
int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
AVFilterBufferRef **bufref, int flags)
{
BufferSinkContext *buf = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret;
*bufref = NULL;
av_assert0( !strcmp(ctx->filter->name, "buffersink")
|| !strcmp(ctx->filter->name, "abuffersink")
|| !strcmp(ctx->filter->name, "ffbuffersink")
|| !strcmp(ctx->filter->name, "ffabuffersink"));
/* no picref available, fetch it from the filterchain */
if (!av_fifo_size(buf->fifo)) {
if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
return AVERROR(EAGAIN);
if ((ret = ff_request_frame(inlink)) < 0)
return ret;
}
if (!av_fifo_size(buf->fifo))
return AVERROR(EINVAL);
if (flags & AV_BUFFERSINK_FLAG_PEEK)
*bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0));
else
av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL);
return 0;
}
/**
* Requests a frame, if needed, from each input link other than the first.
*/
static int request_samples(AVFilterContext *ctx, int min_samples)
{
MixContext *s = ctx->priv;
int i, ret;
av_assert0(s->nb_inputs > 1);
for (i = 1; i < s->nb_inputs; i++) {
ret = 0;
if (!(s->input_state[i] & INPUT_ON))
continue;
if (av_audio_fifo_size(s->fifos[i]) >= min_samples)
continue;
ret = ff_request_frame(ctx->inputs[i]);
if (ret == AVERROR_EOF) {
s->input_state[i] |= INPUT_EOF;
if (av_audio_fifo_size(s->fifos[i]) == 0) {
s->input_state[i] = 0;
continue;
}
} else if (ret < 0)
return ret;
}
return output_frame(ctx->outputs[0]);
}
int ff_request_frame(AVFilterLink *link)
{
int ret = -1;
FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
if (link->closed)
return AVERROR_EOF;
av_assert0(!link->frame_requested);
link->frame_requested = 1;
while (link->frame_requested) {
if (link->srcpad->request_frame)
ret = link->srcpad->request_frame(link);
else if (link->src->inputs[0])
ret = ff_request_frame(link->src->inputs[0]);
if (ret == AVERROR_EOF && link->partial_buf) {
AVFrame *pbuf = link->partial_buf;
link->partial_buf = NULL;
ret = ff_filter_frame_framed(link, pbuf);
}
if (ret < 0) {
link->frame_requested = 0;
if (ret == AVERROR_EOF)
link->closed = 1;
} else {
av_assert0(!link->frame_requested ||
link->flags & FF_LINK_FLAG_REQUEST_LOOP);
}
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SilenceRemoveContext *s = ctx->priv;
int ret;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && (s->mode == SILENCE_COPY_FLUSH ||
s->mode == SILENCE_COPY)) {
int nbs = s->stop_holdoff_end - s->stop_holdoff_offset;
if (nbs) {
AVFrame *frame;
frame = ff_get_audio_buffer(outlink, nbs / outlink->channels);
if (!frame)
return AVERROR(ENOMEM);
memcpy(frame->data[0], &s->stop_holdoff[s->stop_holdoff_offset],
nbs * sizeof(double));
ret = ff_filter_frame(ctx->inputs[0], frame);
}
s->mode = SILENCE_STOP;
}
return ret;
}
int ff_yadif_request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
YADIFContext *yadif = ctx->priv;
int ret;
if (yadif->frame_pending) {
return_frame(ctx, 1);
return 0;
}
if (yadif->eof)
return AVERROR_EOF;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && yadif->cur) {
AVFrame *next = av_frame_clone(yadif->next);
if (!next)
return AVERROR(ENOMEM);
next->pts = yadif->next->pts * 2 - yadif->cur->pts;
ff_yadif_filter_frame(ctx->inputs[0], next);
yadif->eof = 1;
} else if (ret < 0) {
return ret;
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
FifoContext *fifo = outlink->src->priv;
BufPic *tmp;
int ret;
if (!fifo->root.next) {
if ((ret = ff_request_frame(outlink->src->inputs[0]) < 0))
return ret;
}
/* by doing this, we give ownership of the reference to the next filter,
* so we don't have to worry about dereferencing it ourselves. */
ff_start_frame(outlink, fifo->root.next->picref);
ff_draw_slice (outlink, 0, outlink->h, 1);
ff_end_frame (outlink);
if (fifo->last == fifo->root.next)
fifo->last = &fifo->root;
tmp = fifo->root.next->next;
av_free(fifo->root.next);
fifo->root.next = tmp;
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SelectContext *select = ctx->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
select->select = 0;
if (av_fifo_size(select->pending_frames)) {
AVFilterBufferRef *picref;
av_fifo_generic_read(select->pending_frames, &picref, sizeof(picref), NULL);
ff_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
ff_draw_slice(outlink, 0, outlink->h, 1);
ff_end_frame(outlink);
avfilter_unref_buffer(picref);
return 0;
}
while (!select->select) {
int ret = ff_request_frame(inlink);
if (ret < 0)
return ret;
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
FPSContext *s = ctx->priv;
int frames_out = s->frames_out;
int ret = 0;
while (ret >= 0 && s->frames_out == frames_out)
ret = ff_request_frame(ctx->inputs[0]);
/* flush the fifo */
if (ret == AVERROR_EOF && av_fifo_size(s->fifo)) {
int i;
for (i = 0; av_fifo_size(s->fifo); i++) {
AVFrame *buf;
av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
buf->pts = av_rescale_q(s->first_pts, ctx->inputs[0]->time_base,
outlink->time_base) + s->frames_out;
if ((ret = ff_filter_frame(outlink, buf)) < 0)
return ret;
s->frames_out++;
}
return 0;
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SpectrumSynthContext *s = ctx->priv;
int ret;
if (!s->magnitude) {
ret = ff_request_frame(ctx->inputs[0]);
if (ret < 0)
return ret;
}
if (!s->phase) {
ret = ff_request_frame(ctx->inputs[1]);
if (ret < 0)
return ret;
}
return 0;
}
int ff_request_frame(AVFilterLink *link)
{
FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
if (link->srcpad->request_frame)
return link->srcpad->request_frame(link);
else if (link->src->inputs[0])
return ff_request_frame(link->src->inputs[0]);
else return -1;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
InterlaceContext *s = ctx->priv;
int ret = 0;
s->got_output = 0;
while (ret >= 0 && !s->got_output)
ret = ff_request_frame(ctx->inputs[0]);
return ret;
}
static int request_frame(AVFilterLink *link)
{
ThumbContext *thumb = link->src->priv;
/* loop until a frame thumbnail is available (when a frame is queued,
* thumb->n is reset to zero) */
do {
int ret = ff_request_frame(link->src->inputs[0]);
if (ret < 0)
return ret;
} while (thumb->n);
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
BlackDetectContext *blackdetect = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret = ff_request_frame(inlink);
if (ret == AVERROR_EOF && blackdetect->black_started) {
// FIXME: black_end should be set to last_picref_pts + last_picref_duration
blackdetect->black_end = blackdetect->last_picref_pts;
check_black_end(ctx);
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SidechainCompressContext *s = ctx->priv;
int i;
/* get a frame on each input */
for (i = 0; i < 2; i++) {
AVFilterLink *inlink = ctx->inputs[i];
if (!av_audio_fifo_size(s->fifo[i]))
return ff_request_frame(inlink);
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AlphaMergeContext *merge = ctx->priv;
int in, ret;
merge->frame_requested = 1;
while (merge->frame_requested) {
in = ff_bufqueue_peek(&merge->queue_main, 0) ? 1 : 0;
ret = ff_request_frame(ctx->inputs[in]);
if (ret < 0)
return ret;
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SelectContext *select = ctx->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
int out_no = FF_OUTLINK_IDX(outlink);
do {
int ret = ff_request_frame(inlink);
if (ret < 0)
return ret;
} while (select->select_out != out_no);
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
FramepackContext *s = ctx->priv;
int ret, i;
/* get a frame on the either input, stop as soon as a video ends */
for (i = 0; i < 2; i++) {
if (!s->input_views[i]) {
ret = ff_request_frame(ctx->inputs[i]);
if (ret < 0)
return ret;
}
}
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TrimContext *s = ctx->priv;
int ret;
s->got_output = 0;
while (!s->got_output) {
if (s->eof)
return AVERROR_EOF;
ret = ff_request_frame(ctx->inputs[0]);
if (ret < 0)
return ret;
}
return 0;
}
int avfilter_graph_request_oldest(AVFilterGraph *graph)
{
while (graph->sink_links_count) {
AVFilterLink *oldest = graph->sink_links[0];
int r = ff_request_frame(oldest);
if (r != AVERROR_EOF)
return r;
av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
oldest->dst ? oldest->dst->name : "unknown",
oldest->dstpad ? oldest->dstpad->name : "unknown");
/* EOF: remove the link from the heap */
if (oldest->age_index < --graph->sink_links_count)
heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
oldest->age_index);
oldest->age_index = -1;
}
return AVERROR_EOF;
}
