mirror of https://github.com/FFmpeg/FFmpeg.git
It is only used by three of the thirty files that (potentially indirectly) include mpeg4audio.h. Twenty of these files won't have a put_bits.h inclusion any more after this patch. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>pull/388/head
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/*
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* MPEG-4 Audio PCE copying function |
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* |
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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_MPEG4AUDIO_COPY_PCE_H |
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#define AVCODEC_MPEG4AUDIO_COPY_PCE_H |
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#include "libavutil/attributes.h" |
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#include "get_bits.h" |
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#include "put_bits.h" |
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static av_always_inline unsigned int ff_pce_copy_bits(PutBitContext *pb, |
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GetBitContext *gb, |
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int bits) |
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{ |
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unsigned int el = get_bits(gb, bits); |
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put_bits(pb, bits, el); |
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return el; |
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} |
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static inline int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb) |
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{ |
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int five_bit_ch, four_bit_ch, comment_size, bits; |
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int offset = put_bits_count(pb); |
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ff_pce_copy_bits(pb, gb, 10); // Tag, Object Type, Frequency
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five_bit_ch = ff_pce_copy_bits(pb, gb, 4); // Front
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five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Side
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five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Back
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four_bit_ch = ff_pce_copy_bits(pb, gb, 2); // LFE
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four_bit_ch += ff_pce_copy_bits(pb, gb, 3); // Data
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five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Coupling
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if (ff_pce_copy_bits(pb, gb, 1)) // Mono Mixdown
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ff_pce_copy_bits(pb, gb, 4); |
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if (ff_pce_copy_bits(pb, gb, 1)) // Stereo Mixdown
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ff_pce_copy_bits(pb, gb, 4); |
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if (ff_pce_copy_bits(pb, gb, 1)) // Matrix Mixdown
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ff_pce_copy_bits(pb, gb, 3); |
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for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16) |
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ff_pce_copy_bits(pb, gb, 16); |
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if (bits) |
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ff_pce_copy_bits(pb, gb, bits); |
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align_put_bits(pb); |
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align_get_bits(gb); |
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comment_size = ff_pce_copy_bits(pb, gb, 8); |
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for (; comment_size > 0; comment_size--) |
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ff_pce_copy_bits(pb, gb, 8); |
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return put_bits_count(pb) - offset; |
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} |
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#endif /* AVCODEC_MPEG4AUDIO_COPY_PCE_H */ |
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