>
> Hi Frediano,
>
> On Tue, 2017-07-25 at 15:31 +0100, Frediano Ziglio wrote:
> > Using hardware encoders/decoders is possible that the output
> > stride of the image cannot be computed with a fixed formula
> > (width * 4). GStreamer in this case should set GstVideoMeta
> > information with the correct stride value.
> > Consider this value if present.
> > This fix a problem using NvDec encoder and Intel decoder.
> you mean NVENC encoder
>
correct :)
> >
> > Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
> > ---
> > src/channel-display-gst.c | 9 ++++++++-
> > src/channel-display-mjpeg.c | 2 +-
> > src/channel-display-priv.h | 2 +-
> > src/channel-display.c | 6 ++++--
> > 4 files changed, 14 insertions(+), 5 deletions(-)
> >
> > diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
> > index 03c6044..0abe706 100644
> > --- a/src/channel-display-gst.c
> > +++ b/src/channel-display-gst.c
> > @@ -26,6 +26,7 @@
> > #include <gst/gst.h>
> > #include <gst/app/gstappsrc.h>
> > #include <gst/app/gstappsink.h>
> > +#include <gst/video/gstvideometa.h>
> >
> >
> > /* GStreamer decoder implementation */
> > @@ -102,6 +103,12 @@ static void free_gst_frame(SpiceGstFrame *gstframe)
> >
> > static void schedule_frame(SpiceGstDecoder *decoder);
> >
> > +static int gst_buffer_get_stride(GstBuffer *buffer)
> I'd prefer to do in our namespace instead on gstreamer's
> > +{
> > + GstVideoMeta *video = gst_buffer_get_video_meta(buffer);
> > + return video ? video->stride[0] : 0;
> The documentation of GstVideoMeta says that the value of the stride may be
> invalid - do you know what is the value in that case?
>
> What about using some constant instead of 0 (respectively the invalid value)
> (SPICE_UNKNOWN_STRIDE)
>
No idea the gstreamer invalid value. Maybe n_planes == 0 ?
Where do you suggest to define it?
#define SPICE_UNKNOWN_STRIDE 0
in src/channel-display-priv.h ?
>
> > +}
> > +
> > /* main context */
> > static gboolean display_frame(gpointer video_decoder)
> > {
> > @@ -145,7 +152,7 @@ static gboolean display_frame(gpointer video_decoder)
> > }
> >
> > stream_display_frame(decoder->base.stream, gstframe->frame,
> > - width, height, mapinfo.data);
> > + width, height, gst_buffer_get_stride(buffer),
> > mapinfo.data);
> > gst_buffer_unmap(buffer, &mapinfo);
> >
> > error:
> > diff --git a/src/channel-display-mjpeg.c b/src/channel-display-mjpeg.c
> > index 3ba098c..6082511 100644
> > --- a/src/channel-display-mjpeg.c
> > +++ b/src/channel-display-mjpeg.c
> > @@ -176,7 +176,7 @@ static gboolean mjpeg_decoder_decode_frame(gpointer
> > video_decoder)
> >
> > /* Display the frame and dispose of it */
> > stream_display_frame(decoder->base.stream, decoder->cur_frame,
> > - width, height, decoder->out_frame);
> > + width, height, 0, decoder->out_frame);
>
> same here
>
> > free_spice_frame(decoder->cur_frame);
> > decoder->cur_frame = NULL;
> > decoder->timer_id = 0;
> > diff --git a/src/channel-display-priv.h b/src/channel-display-priv.h
> > index 04cb4d1..72e0840 100644
> > --- a/src/channel-display-priv.h
> > +++ b/src/channel-display-priv.h
> > @@ -192,7 +192,7 @@ G_STATIC_ASSERT(G_N_ELEMENTS(gst_opts) <=
> > SPICE_VIDEO_CODEC_TYPE_ENUM_END);
> >
> > guint32 stream_get_time(display_stream *st);
> > void stream_dropped_frame_on_playback(display_stream *st);
> > -void stream_display_frame(display_stream *st, SpiceFrame *frame, uint32_t
> > width, uint32_t height, uint8_t* data);
> > +void stream_display_frame(display_stream *st, SpiceFrame *frame, uint32_t
> > width, uint32_t height, int stride, uint8_t* data);
> > gint64 get_stream_id_by_stream(SpiceChannel *channel, display_stream *st);
> >
> >
> > diff --git a/src/channel-display.c b/src/channel-display.c
> > index 06ed18a..4eb665f 100644
> > --- a/src/channel-display.c
> > +++ b/src/channel-display.c
> > @@ -1312,9 +1312,11 @@ void stream_dropped_frame_on_playback(display_stream
> > *st)
> > /* main context */
> > G_GNUC_INTERNAL
> > void stream_display_frame(display_stream *st, SpiceFrame *frame,
> > - uint32_t width, uint32_t height, uint8_t *data)
> > + uint32_t width, uint32_t height, int stride,
> > uint8_t *data)
> > {
> > - int stride = width * sizeof(uint32_t);
> > + if (stride == 0) {
> and here
> > + stride = width * sizeof(uint32_t);
> > + }
> > if (!(st->flags & SPICE_STREAM_FLAGS_TOP_DOWN)) {
> > data += stride * (height - 1);
> > stride = -stride;
>
Frediano
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