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cb9f98f0d5
We can avoid scanning for start codes again if the bitstream is fed in NALU chunks. Currently, we always scan for start codes, and keep track of remaining bits in a GstAdapter, even if, in practice, we are likely receiving one GstBuffer per NAL unit. i.e. h264parse with "nal" alignment. https://bugzilla.gnome.org/show_bug.cgi?id=723284 [use gst_adapter_available_fast() to determine the top buffer size] Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* gstvaapidecoder_h264.h - H.264 decoder
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*
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* Copyright (C) 2011-2013 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef GST_VAAPI_DECODER_H264_H
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#define GST_VAAPI_DECODER_H264_H
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#include <gst/vaapi/gstvaapidecoder.h>
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G_BEGIN_DECLS
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#define GST_VAAPI_DECODER_H264(decoder) \
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((GstVaapiDecoderH264 *)(decoder))
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typedef struct _GstVaapiDecoderH264 GstVaapiDecoderH264;
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/**
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* GstVaapiStreamAlignH264:
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* @GST_VAAPI_STREAM_ALIGN_H264_NONE: Generic H.264 stream buffers
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* @GST_VAAPI_STREAM_ALIGN_H264_NALU: H.264 stream buffers aligned NAL
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* unit boundaries
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* @GST_VAAPI_STREAM_ALIGN_H264_AU: H.264 stream buffers aligned on
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* access unit boundaries
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*
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* Set of possible buffer alignments for H.264 streams.
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*/
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typedef enum {
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GST_VAAPI_STREAM_ALIGN_H264_NONE,
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GST_VAAPI_STREAM_ALIGN_H264_NALU,
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GST_VAAPI_STREAM_ALIGN_H264_AU
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} GstVaapiStreamAlignH264;
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GstVaapiDecoder *
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gst_vaapi_decoder_h264_new(GstVaapiDisplay *display, GstCaps *caps);
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void
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gst_vaapi_decoder_h264_set_alignment(GstVaapiDecoderH264 *decoder,
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GstVaapiStreamAlignH264 alignment);
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G_END_DECLS
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#endif /* GST_VAAPI_DECODER_H264_H */
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