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v4l2: only produce data when needed

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We should only produce data when the io area status is NEED_BUFFER.
This commit is contained in:
Wim Taymans 2017-10-16 13:23:20 +02:00
parent 9706c191b9
commit 574c6d4b90
1 changed files with 7 additions and 3 deletions
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4
spa/plugins/v4l2/v4l2-utils.c
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@ -931,9 +931,13 @@ static int mmap_read(struct impl *this)
d[0].chunk->stride = state->fmt.fmt.pix.bytesperline; d[0].chunk->stride = state->fmt.fmt.pix.bytesperline;
b->outstanding = true; b->outstanding = true;
if (io->status == SPA_RESULT_NEED_BUFFER) {
io->buffer_id = b->outbuf->id; io->buffer_id = b->outbuf->id;
io->status = SPA_RESULT_HAVE_BUFFER; io->status = SPA_RESULT_HAVE_BUFFER;
this->callbacks->have_output(this->callbacks_data); this->callbacks->have_output(this->callbacks_data);
} else {
spa_v4l2_buffer_recycle(this, b->outbuf->id);
}
return SPA_RESULT_OK; return SPA_RESULT_OK;
} }