aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* imx dump header bitstream filter
* Copyright (c) 2007 Baptiste Coudurier
*
* 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
*/
/**
* @file
* imx dump header bitstream filter
* modifies bitstream to fit in mov and be decoded by final cut pro decoder
*/
#include "avcodec.h"
#include "bsf.h"
#include "bytestream.h"
static int imx_dump_header(AVBSFContext *ctx, AVPacket *out)
{
/* MXF essence element key */
static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 };
AVPacket *in;
int ret = 0;
uint8_t *out_buf;
ret = ff_bsf_get_packet(ctx, &in);
if (ret < 0)
return ret;
ret = av_new_packet(out, in->size + 20);
if (ret < 0)
goto fail;
out_buf = out->data;
bytestream_put_buffer(&out_buf, imx_header, 16);
bytestream_put_byte(&out_buf, 0x83); /* KLV BER long form */
bytestream_put_be24(&out_buf, in->size);
bytestream_put_buffer(&out_buf, in->data, in->size);
ret = av_packet_copy_props(out, in);
if (ret < 0)
goto fail;
fail:
if (ret < 0)
av_packet_unref(out);
av_packet_free(&in);
return ret;
}
static const enum AVCodecID codec_ids[] = {
AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE,
};
const AVBitStreamFilter ff_imx_dump_header_bsf = {
.name = "imxdump",
.filter = imx_dump_header,
.codec_ids = codec_ids,
};
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