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91 lines
3.2 KiB
91 lines
3.2 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_CBS_INTERNAL_H |
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#define AVCODEC_CBS_INTERNAL_H |
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#include "avcodec.h" |
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#include "cbs.h" |
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#include "get_bits.h" |
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#include "put_bits.h" |
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typedef struct CodedBitstreamType { |
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enum AVCodecID codec_id; |
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size_t priv_data_size; |
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// Split frag->data into coded bitstream units, creating the |
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// frag->units array. Fill data but not content on each unit. |
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// header is set if the fragment came from a header block, which |
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// may require different parsing for some codecs (e.g. the AVCC |
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// header in H.264). |
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int (*split_fragment)(CodedBitstreamContext *ctx, |
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CodedBitstreamFragment *frag, |
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int header); |
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// Read the unit->data bitstream and decompose it, creating |
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// unit->content. |
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int (*read_unit)(CodedBitstreamContext *ctx, |
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CodedBitstreamUnit *unit); |
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// Write the unit->data bitstream from unit->content. |
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int (*write_unit)(CodedBitstreamContext *ctx, |
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CodedBitstreamUnit *unit); |
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// Read the data from all of frag->units and assemble it into |
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// a bitstream for the whole fragment. |
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int (*assemble_fragment)(CodedBitstreamContext *ctx, |
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CodedBitstreamFragment *frag); |
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// Free the content and data of a single unit. |
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void (*free_unit)(CodedBitstreamUnit *unit); |
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// Free the codec internal state. |
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void (*close)(CodedBitstreamContext *ctx); |
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} CodedBitstreamType; |
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// Helper functions for trace output. |
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void ff_cbs_trace_header(CodedBitstreamContext *ctx, |
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const char *name); |
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void ff_cbs_trace_syntax_element(CodedBitstreamContext *ctx, |
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int position, const char *name, |
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const char *bitstring, int64_t value); |
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// Helper functions for read/write of common bitstream elements, including |
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// generation of trace output. |
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int ff_cbs_read_unsigned(CodedBitstreamContext *ctx, GetBitContext *gbc, |
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int width, const char *name, uint32_t *write_to, |
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uint32_t range_min, uint32_t range_max); |
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int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc, |
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int width, const char *name, uint32_t value, |
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uint32_t range_min, uint32_t range_max); |
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extern const CodedBitstreamType ff_cbs_type_h264; |
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extern const CodedBitstreamType ff_cbs_type_h265; |
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extern const CodedBitstreamType ff_cbs_type_mpeg2; |
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#endif /* AVCODEC_CBS_INTERNAL_H */
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