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a35917268d
This allows the compiler to remove the implicit "Do I need to output the PutBitContext buffer here?" checks. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/*
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* RV10 encoder
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* Copyright (c) 2000,2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer
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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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/**
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* @file
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* RV10 encoder
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*/
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#include "codec_internal.h"
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#include "mpegvideo.h"
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#include "mpegvideoenc.h"
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#include "put_bits.h"
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#include "rv10enc.h"
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int ff_rv10_encode_picture_header(MPVMainEncContext *const m)
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{
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MPVEncContext *const s = &m->s;
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int full_frame= 0;
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put_bits_assume_flushed(&s->pb);
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put_bits(&s->pb, 1, 1); /* marker */
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put_bits(&s->pb, 1, (s->c.pict_type == AV_PICTURE_TYPE_P));
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put_bits(&s->pb, 1, 0); /* not PB-mframe */
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put_bits(&s->pb, 5, s->c.qscale);
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if (s->c.pict_type == AV_PICTURE_TYPE_I) {
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/* specific MPEG like DC coding not used */
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}
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/* if multiple packets per frame are sent, the position at which
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to display the macroblocks is coded here */
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if(!full_frame){
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if (s->c.mb_width * s->c.mb_height >= (1U << 12)) {
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avpriv_report_missing_feature(s->c.avctx, "Encoding frames with %d (>= 4096) macroblocks",
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s->c.mb_width * s->c.mb_height);
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return AVERROR(ENOSYS);
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}
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put_bits(&s->pb, 6, 0); /* mb_x */
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put_bits(&s->pb, 6, 0); /* mb_y */
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put_bits(&s->pb, 12, s->c.mb_width * s->c.mb_height);
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}
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put_bits(&s->pb, 3, 0); /* ignored */
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return 0;
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}
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const FFCodec ff_rv10_encoder = {
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.p.name = "rv10",
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CODEC_LONG_NAME("RealVideo 1.0"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_RV10,
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.p.priv_class = &ff_mpv_enc_class,
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
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.priv_data_size = sizeof(MPVMainEncContext),
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.init = ff_mpv_encode_init,
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FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
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.close = ff_mpv_encode_end,
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
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CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
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.color_ranges = AVCOL_RANGE_MPEG,
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};
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