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https://github.com/FFmpeg/FFmpeg.git
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af9cac1be1
* commit '33d18982fa03feb061c8f744a4f0a9175c1f63ab': lavc: add a new bitstream filtering API Conversions-by: Hendrik Leppkes <h.leppkes@gmail.com> Conversions-by: Derek Buitenguis <derek.buitenhuis@gmail.com> Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* Copyright (c) 2008 Reimar Döffinger
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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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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "bsf.h"
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static int text2movsub(AVBSFContext *ctx, AVPacket *out)
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{
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AVPacket *in;
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int ret = 0;
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ret = ff_bsf_get_packet(ctx, &in);
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if (ret < 0)
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return ret;
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if (in->size > 0xffff) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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ret = av_new_packet(out, in->size + 2);
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if (ret < 0) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = av_packet_copy_props(out, in);
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if (ret < 0)
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goto fail;
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AV_WB16(out->data, in->size);
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memcpy(out->data + 2, in->data, in->size);
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fail:
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if (ret < 0)
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av_packet_unref(out);
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av_packet_free(&in);
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return ret;
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}
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const AVBitStreamFilter ff_text2movsub_bsf = {
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.name = "text2movsub",
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.filter = text2movsub,
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};
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static int mov2textsub(AVBSFContext *ctx, AVPacket *out)
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{
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AVPacket *in;
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int ret = 0;
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ret = ff_bsf_get_packet(ctx, &in);
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if (ret < 0)
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return ret;
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if (in->size < 2) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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ret = av_new_packet(out, FFMIN(in->size - 2, AV_RB16(in->data)));
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if (ret < 0)
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goto fail;
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ret = av_packet_copy_props(out, in);
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if (ret < 0)
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goto fail;
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memcpy(out->data, in->data + 2, out->size);
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fail:
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if (ret < 0)
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av_packet_unref(out);
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av_packet_free(&in);
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return ret;
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}
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const AVBitStreamFilter ff_mov2textsub_bsf = {
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.name = "mov2textsub",
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.filter = mov2textsub,
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};
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