This disables forcing IDR frames at GOP size intervals on CODA7541 and CODA960,
which is only needed to work around a firmware bug on CodaDx6.
Instead, the V4L2_BUF_FLAG_KEYFRAME v4l2 buffer flag is cleared before marking
the source buffer done for dequeueing. Userspace can set it before queueing a
frame to force an IDR frame, to implement VFU (Video Fast Update).
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/media/platform/coda.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index 11e059d..cf75112 100644
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -1264,22 +1264,22 @@ static void coda_prepare_encode(struct coda_ctx *ctx)
* frame as IDR. This is a problem for some decoders that can't
* recover when a frame is lost.
*/
- if (src_buf->v4l2_buf.sequence % ctx->params.gop_size) {
- src_buf->v4l2_buf.flags |= V4L2_BUF_FLAG_PFRAME;
- src_buf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_KEYFRAME;
- } else {
+ if ((src_buf->v4l2_buf.sequence % ctx->params.gop_size) == 0)
src_buf->v4l2_buf.flags |= V4L2_BUF_FLAG_KEYFRAME;
+ if (src_buf->v4l2_buf.flags & V4L2_BUF_FLAG_KEYFRAME)
src_buf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_PFRAME;
- }
+ else
+ src_buf->v4l2_buf.flags |= V4L2_BUF_FLAG_PFRAME;
if (dev->devtype->product == CODA_960)
coda_set_gdi_regs(ctx);
/*
- * Copy headers at the beginning of the first frame for H.264 only.
- * In MPEG4 they are already copied by the coda.
+ * Copy headers in front of the first frame and forced I frames for
+ * H.264 only. In MPEG4 they are already copied by the CODA.
*/
- if (src_buf->v4l2_buf.sequence == 0) {
+ if (src_buf->v4l2_buf.sequence == 0 ||
+ src_buf->v4l2_buf.flags & V4L2_BUF_FLAG_KEYFRAME) {
pic_stream_buffer_addr =
vb2_dma_contig_plane_dma_addr(dst_buf, 0) +
ctx->vpu_header_size[0] +
@@ -3245,6 +3245,8 @@ static void coda_finish_encode(struct coda_ctx *ctx)
src_buf->v4l2_buf.flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
dst_buf->v4l2_buf.timecode = src_buf->v4l2_buf.timecode;
+ /* Clear keyframe flag so userspace can misuse it to force an IDR frame
*/
+ src_buf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_KEYFRAME;
v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
--
2.0.0.rc2
--
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