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encoder: fix computation of max coded buffer size.

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Fix coded buffer size for each codec. A generic issue was that the
number of macroblocks was incorrectly computed. The second issue was
specific to MPEG-2 were the max number of bits per macroblock, and
as defined by the standard, was incorrectly mapped to the (lower)
H.264 requirement. i.e. 4608 bits vs. 3200 bits limit.
This commit is contained in:
Gwenole Beauchesne 2013-12-04 19:10:13 +01:00
parent fd9c855f14
commit b864d1f71a
3 changed files with 11 additions and 3 deletions
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3
gst-libs/gst/vaapi/gstvaapiencoder.c
View file

@ -371,9 +371,6 @@ gst_vaapi_encoder_set_format (GstVaapiEncoder * encoder,
if (!gst_vaapi_encoder_ensure_context (encoder))
goto error;
encoder->codedbuf_size = (GST_VAAPI_ENCODER_WIDTH (encoder) *
GST_VAAPI_ENCODER_HEIGHT (encoder) * 400) / (16 * 16);
encoder->codedbuf_pool = gst_vaapi_coded_buffer_pool_new (encoder,
encoder->codedbuf_size);
if (!encoder->codedbuf_pool) {

6
gst-libs/gst/vaapi/gstvaapiencoder_h264.c
View file

@ -1594,6 +1594,12 @@ gst_vaapi_encoder_h264_set_context_info (GstVaapiEncoder * base_encoder)
cip->profile = encoder->profile;
cip->ref_frames = (encoder->b_frame_num ? 2 : 1) + DEFAULT_SURFACES_COUNT;
/* Only YUV 4:2:0 formats are supported for now. This means that we
have a limit of 3200 bits per macroblock. */
/* XXX: check profile and compute RawMbBits */
base_encoder->codedbuf_size = (GST_ROUND_UP_16 (cip->width) *
GST_ROUND_UP_16 (cip->height) / 256) * 400;
}
static GstCaps *

5
gst-libs/gst/vaapi/gstvaapiencoder_mpeg2.c
View file

@ -635,6 +635,11 @@ gst_vaapi_encoder_mpeg2_set_context_info (GstVaapiEncoder * base_encoder)
cip->profile = to_vaapi_profile (encoder->profile);
cip->ref_frames = 2;
/* Only YUV 4:2:0 formats are supported for now. This means that we
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;
}
static gboolean