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applemedia: vtdec: report latency

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This commit is contained in:
Alessandro Decina 2013-12-11 08:10:19 +01:00
parent 733a780e9d
commit 596aa8e05a
1 changed files with 35 additions and 8 deletions

43
sys/applemedia/vtdec.c
View file

@ -74,6 +74,9 @@ static void gst_vtdec_session_output_callback (void
CMTime duration);
static gboolean compute_h264_decode_picture_buffer_length (GstVtdec * vtdec,
GstBuffer * codec_data, int *length);
static gboolean gst_vtdec_compute_reorder_queue_size (GstVtdec * vtdec,
CMVideoCodecType cm_format, GstBuffer * codec_data);
static void gst_vtdec_set_latency (GstVtdec * vtdec);
static GstStaticPadTemplate gst_vtdec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
@ -203,14 +206,10 @@ gst_vtdec_set_format (GstVideoDecoder * decoder, GstVideoCodecState * state)
gst_video_info_from_caps (&vtdec->video_info, state->caps);
if (cm_format == kCMVideoCodecType_H264) {
if (!compute_h264_decode_picture_buffer_length (vtdec, state->codec_data,
&vtdec->reorder_queue_frame_delay)) {
return FALSE;
}
} else {
vtdec->reorder_queue_frame_delay = 0;
}
if (!gst_vtdec_compute_reorder_queue_size (vtdec, cm_format,
state->codec_data))
return FALSE;
gst_vtdec_set_latency (vtdec);
if (state->codec_data) {
format_description = create_format_description_from_codec_data (vtdec,
@ -651,6 +650,22 @@ get_dpb_max_mb_s_from_level (int level)
}
}
static gboolean
gst_vtdec_compute_reorder_queue_size (GstVtdec * vtdec,
CMVideoCodecType cm_format, GstBuffer * codec_data)
{
if (cm_format == kCMVideoCodecType_H264) {
if (!compute_h264_decode_picture_buffer_length (vtdec, codec_data,
&vtdec->reorder_queue_frame_delay)) {
return FALSE;
}
} else {
vtdec->reorder_queue_frame_delay = 0;
}
return TRUE;
}
static gboolean
compute_h264_decode_picture_buffer_length (GstVtdec * vtdec,
GstBuffer * codec_data, int *length)
@ -679,3 +694,15 @@ compute_h264_decode_picture_buffer_length (GstVtdec * vtdec,
max_dpb_size_frames);
return TRUE;
}
static void
gst_vtdec_set_latency (GstVtdec * vtdec)
{
GstClockTime frame_duration = gst_util_uint64_scale (GST_SECOND,
vtdec->video_info.fps_d, vtdec->video_info.fps_n);
GstClockTime latency = frame_duration * vtdec->reorder_queue_frame_delay;
GST_INFO_OBJECT (vtdec, "setting latency frames:%d time:%" GST_TIME_FORMAT,
vtdec->reorder_queue_frame_delay, GST_TIME_ARGS (latency));
gst_video_decoder_set_latency (GST_VIDEO_DECODER (vtdec), latency, latency);
}