mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 19:30:05 +00:00
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
/*
|
|
* Copyright (c) 2008 Reimar Döffinger
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avcodec.h"
|
|
#include "bsf.h"
|
|
|
|
static int text2movsub(AVBSFContext *ctx, AVPacket *out)
|
|
{
|
|
AVPacket *in;
|
|
int ret = 0;
|
|
|
|
ret = ff_bsf_get_packet(ctx, &in);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (in->size > 0xffff) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
ret = av_new_packet(out, in->size + 2);
|
|
if (ret < 0) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
ret = av_packet_copy_props(out, in);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
AV_WB16(out->data, in->size);
|
|
memcpy(out->data + 2, in->data, in->size);
|
|
|
|
fail:
|
|
if (ret < 0)
|
|
av_packet_unref(out);
|
|
av_packet_free(&in);
|
|
return ret;
|
|
}
|
|
|
|
const AVBitStreamFilter ff_text2movsub_bsf = {
|
|
.name = "text2movsub",
|
|
.filter = text2movsub,
|
|
};
|
|
|
|
static int mov2textsub(AVBSFContext *ctx, AVPacket *out)
|
|
{
|
|
AVPacket *in;
|
|
int ret = 0;
|
|
|
|
ret = ff_bsf_get_packet(ctx, &in);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (in->size < 2) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
ret = av_new_packet(out, FFMIN(in->size - 2, AV_RB16(in->data)));
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = av_packet_copy_props(out, in);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
memcpy(out->data, in->data + 2, out->size);
|
|
|
|
fail:
|
|
if (ret < 0)
|
|
av_packet_unref(out);
|
|
av_packet_free(&in);
|
|
return ret;
|
|
}
|
|
|
|
const AVBitStreamFilter ff_mov2textsub_bsf = {
|
|
.name = "mov2textsub",
|
|
.filter = mov2textsub,
|
|
};
|