int avfilter_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 avfilter_request_frame(link->src->inputs[0]);
else return -1;
}
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 AVERROR(EINVAL);
}
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
{
int (*filter_frame)(AVFilterLink *, AVFrame *);
AVFilterPad *dst = link->dstpad;
AVFrame *out;
FF_DPRINTF_START(NULL, filter_frame);
ff_dlog_link(NULL, link, 1);
if (!(filter_frame = dst->filter_frame))
filter_frame = default_filter_frame;
/* copy the frame if needed */
if (dst->needs_writable && !av_frame_is_writable(frame)) {
av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
out = ff_get_video_buffer(link, link->w, link->h);
break;
case AVMEDIA_TYPE_AUDIO:
out = ff_get_audio_buffer(link, frame->nb_samples);
break;
default: return AVERROR(EINVAL);
}
if (!out) {
av_frame_free(&frame);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, frame);
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
frame->format, frame->width, frame->height);
break;
case AVMEDIA_TYPE_AUDIO:
av_samples_copy(out->extended_data, frame->extended_data,
0, 0, frame->nb_samples,
av_get_channel_layout_nb_channels(frame->channel_layout),
frame->format);
break;
default: return AVERROR(EINVAL);
}
av_frame_free(&frame);
} else
out = frame;
return filter_frame(link, out);
}
void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
{
void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
AVFilterPad *dst = link->dstpad;
int64_t pts;
FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
if (!(filter_samples = dst->filter_samples))
filter_samples = ff_default_filter_samples;
/* prepare to copy the samples if the buffer has insufficient permissions */
if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
dst->rej_perms & samplesref->perms) {
int i, size, planar = av_sample_fmt_is_planar(samplesref->format);
int planes = !planar ? 1:
av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
av_log(link->dst, AV_LOG_DEBUG,
"Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
link->cur_buf = ff_default_get_audio_buffer(link, dst->min_perms,
samplesref->audio->nb_samples);
link->cur_buf->pts = samplesref->pts;
link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
/* Copy actual data into new samples buffer */
/* src can be larger than dst if it was allocated larger than necessary.
dst can be slightly larger due to extra alignment padding. */
size = FFMIN(samplesref->linesize[0], link->cur_buf->linesize[0]);
for (i = 0; samplesref->data[i] && i < 8; i++)
memcpy(link->cur_buf->data[i], samplesref->data[i], size);
for (i = 0; i < planes; i++)
memcpy(link->cur_buf->extended_data[i], samplesref->extended_data[i], size);
avfilter_unref_buffer(samplesref);
} else
link->cur_buf = samplesref;
pts = link->cur_buf->pts;
filter_samples(link, link->cur_buf);
ff_update_link_current_pts(link, pts);
}
