mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-28 04:31:06 +00:00
Code Issues 1 Projects Releases Wiki Activity

encoder: fix computation of max coded buffer size (again).

Browse source 
The previous fix was only valid to express the maximum size of the
macroblock layer, i.e. without any headers. Now, also account for
the slice headers and top picture header, but also any other header
we might stuff into the VA coded buffer, e.g. sequence headers.
This commit is contained in:
Gwenole Beauchesne 2013-12-05 18:13:54 +01:00
parent b864d1f71a
commit 2940a74ea4
2 changed files with 44 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
gst-libs/gst/vaapi/gstvaapiencoder_h264.c
View file

@ -1592,6 +1592,15 @@ gst_vaapi_encoder_h264_set_context_info (GstVaapiEncoder * base_encoder)
GstVaapiContextInfo *const cip = &base_encoder->context_info;
const guint DEFAULT_SURFACES_COUNT = 3;
/* Maximum sizes for common headers (in bits) */
enum {
MAX_SPS_HDR_SIZE = 16473,
MAX_VUI_PARAMS_SIZE = 210,
MAX_HRD_PARAMS_SIZE = 4103,
MAX_PPS_HDR_SIZE = 101,
MAX_SLICE_HDR_SIZE = 397 + 2572 + 6670 + 2402,
};
cip->profile = encoder->profile;
cip->ref_frames = (encoder->b_frame_num ? 2 : 1) + DEFAULT_SURFACES_COUNT;
@ -1600,6 +1609,19 @@ gst_vaapi_encoder_h264_set_context_info (GstVaapiEncoder * base_encoder)
/* XXX: check profile and compute RawMbBits */
base_encoder->codedbuf_size = (GST_ROUND_UP_16 (cip->width) *
GST_ROUND_UP_16 (cip->height) / 256) * 400;
/* Account for SPS header */
/* XXX: exclude scaling lists, MVC/SVC extensions */
base_encoder->codedbuf_size += 4 + GST_ROUND_UP_8 (MAX_SPS_HDR_SIZE +
MAX_VUI_PARAMS_SIZE + 2 * MAX_HRD_PARAMS_SIZE) / 8;
/* Account for PPS header */
/* XXX: exclude slice groups, scaling lists, MVC/SVC extensions */
base_encoder->codedbuf_size += 4 + GST_ROUND_UP_8 (MAX_PPS_HDR_SIZE) / 8;
/* Account for slice header. At most 200 slices are supported */
base_encoder->codedbuf_size += 200 * (4 +
GST_ROUND_UP_8 (MAX_SLICE_HDR_SIZE) / 8);
}
static GstCaps *

22
gst-libs/gst/vaapi/gstvaapiencoder_mpeg2.c
View file

@ -633,6 +633,16 @@ gst_vaapi_encoder_mpeg2_set_context_info (GstVaapiEncoder * base_encoder)
GstVaapiEncoderMpeg2 *const encoder = GST_VAAPI_ENCODER_MPEG2 (base_encoder);
GstVaapiContextInfo *const cip = &base_encoder->context_info;
/* Maximum sizes for common headers (in bytes) */
enum {
MAX_SEQ_HDR_SIZE = 140,
MAX_SEQ_EXT_SIZE = 10,
MAX_GOP_SIZE = 8,
MAX_PIC_HDR_SIZE = 10,
MAX_PIC_EXT_SIZE = 11,
MAX_SLICE_HDR_SIZE = 8,
};
cip->profile = to_vaapi_profile (encoder->profile);
cip->ref_frames = 2;
@ -640,6 +650,18 @@ gst_vaapi_encoder_mpeg2_set_context_info (GstVaapiEncoder * base_encoder)
have a limit of 4608 bits per macroblock. */
base_encoder->codedbuf_size = (GST_ROUND_UP_16 (cip->width) *
GST_ROUND_UP_16 (cip->height) / 256) * 576;
/* Account for Sequence, GOP, and Picture headers */
/* XXX: exclude unused Sequence Display Extension, Sequence Scalable
Extension, Quantization Matrix Extension, Picture Display Extension,
Picture Temporal Scalable Extension, Picture Spatial Scalable
Extension */
base_encoder->codedbuf_size += MAX_SEQ_HDR_SIZE + MAX_SEQ_EXT_SIZE +
MAX_GOP_SIZE + MAX_PIC_HDR_SIZE + MAX_PIC_EXT_SIZE;
/* Account for Slice headers. We use one slice per line of macroblock */
base_encoder->codedbuf_size += (GST_ROUND_UP_16 (cip->height) / 16) *
MAX_SLICE_HDR_SIZE;
}
static gboolean