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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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