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omxvideoenc/dec: declare latency on zynqultrascaleplus

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The OMX specification doesn't provide any API to expose the latency
introduced by encoders and decoders. We implemented this as a custom
extension as declaring the latency is needed for live pipelines like
video conferencing.

https://bugzilla.gnome.org/show_bug.cgi?id=785125
This commit is contained in:
Guillaume Desmottes 2017-07-06 14:19:19 +02:00 committed by Nicolas Dufresne
parent 0ee8213ab2
commit f2b0b66e39
2 changed files with 66 additions and 0 deletions
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33
omx/gstomxvideodec.c
View file

@ -1987,6 +1987,35 @@ gst_omx_video_dec_negotiate (GstOMXVideoDec * self)
return (err == OMX_ErrorNone);
}
#ifdef USE_OMX_TARGET_ZYNQ_USCALE_PLUS
static void
gst_omx_video_dec_set_latency (GstOMXVideoDec * self)
{
GstClockTime latency;
OMX_ALG_PARAM_REPORTED_LATENCY param;
OMX_ERRORTYPE err;
GST_OMX_INIT_STRUCT (&param);
err =
gst_omx_component_get_parameter (self->dec,
(OMX_INDEXTYPE) OMX_ALG_IndexParamReportedLatency, &param);
if (err != OMX_ErrorNone) {
GST_WARNING_OBJECT (self, "Couldn't retrieve latency: %s (0x%08x)",
gst_omx_error_to_string (err), err);
return;
}
GST_DEBUG_OBJECT (self, "retrieved latency of %d ms",
(guint32) param.nLatency);
/* Convert to ns */
latency = param.nLatency * GST_MSECOND;
gst_video_encoder_set_latency (GST_VIDEO_ENCODER (self), latency, latency);
}
#endif
static gboolean
gst_omx_video_dec_disable (GstOMXVideoDec * self)
{
@ -2282,6 +2311,10 @@ gst_omx_video_dec_set_format (GstVideoDecoder * decoder,
gst_buffer_replace (&self->codec_data, state->codec_data);
self->input_state = gst_video_codec_state_ref (state);
#ifdef USE_OMX_TARGET_ZYNQ_USCALE_PLUS
gst_omx_video_dec_set_latency (self);
#endif
self->downstream_flow_ret = GST_FLOW_OK;
return TRUE;
}

33
omx/gstomxvideoenc.c
View file

@ -944,6 +944,35 @@ gst_omx_video_enc_stop (GstVideoEncoder * encoder)
return TRUE;
}
#ifdef USE_OMX_TARGET_ZYNQ_USCALE_PLUS
static void
gst_omx_video_enc_set_latency (GstOMXVideoEnc * self)
{
GstClockTime latency;
OMX_ALG_PARAM_REPORTED_LATENCY param;
OMX_ERRORTYPE err;
GST_OMX_INIT_STRUCT (&param);
err =
gst_omx_component_get_parameter (self->enc,
(OMX_INDEXTYPE) OMX_ALG_IndexParamReportedLatency, &param);
if (err != OMX_ErrorNone) {
GST_WARNING_OBJECT (self, "Couldn't retrieve latency: %s (0x%08x)",
gst_omx_error_to_string (err), err);
return;
}
GST_DEBUG_OBJECT (self, "retrieved latency of %d ms",
(guint32) param.nLatency);
/* Convert to ns */
latency = param.nLatency * GST_MSECOND;
gst_video_encoder_set_latency (GST_VIDEO_ENCODER (self), latency, latency);
}
#endif
static gboolean
gst_omx_video_enc_disable (GstOMXVideoEnc * self)
{
@ -1329,6 +1358,10 @@ gst_omx_video_enc_set_format (GstVideoEncoder * encoder,
gst_video_codec_state_unref (self->input_state);
self->input_state = gst_video_codec_state_ref (state);
#ifdef USE_OMX_TARGET_ZYNQ_USCALE_PLUS
gst_omx_video_enc_set_latency (self);
#endif
self->downstream_flow_ret = GST_FLOW_OK;
return TRUE;
}