mirror of https://git.ffmpeg.org/ffmpeg.git
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
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/*
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* MXF muxer
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* Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
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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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* References
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* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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* SMPTE 377M MXF File Format Specifications
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* SMPTE 379M MXF Generic Container
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* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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* SMPTE RP210: SMPTE Metadata Dictionary
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* SMPTE RP224: Registry of SMPTE Universal Labels
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*/
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//#define DEBUG
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static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type)
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{
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const MXFCodecUL *uls = mxf_essence_container_uls;
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while (uls->id != CODEC_ID_NONE) {
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if (uls->id == type)
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break;
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uls++;
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}
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return uls;
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}
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static void mxf_free(AVFormatContext *s)
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{
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MXFContext *mxf = s->priv_data;
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AVStream *st;
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int i;
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av_freep(&mxf->reference.identification);
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av_freep(mxf->reference.package);
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av_freep(&mxf->reference.package);
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av_freep(&mxf->reference.content_storage);
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for (i = 0; i < s->nb_streams; i++) {
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st = s->streams[i];
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av_freep(&st->priv_data);
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}
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av_freep(mxf->reference.sub_desc);
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av_freep(&mxf->reference.sub_desc);
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av_freep(&mxf->reference.mul_desc);
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av_freep(&mxf->essence_container_uls);
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}
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static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
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{
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const MXFDataDefinitionUL *uls = mxf_data_definition_uls;
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while (uls->type != CODEC_TYPE_DATA) {
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if (type == uls->type)
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break;
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uls ++;
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}
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return uls;
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}
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static int mux_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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ByteIOContext *pb = s->pb;
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AVStream *st = s->streams[pkt->stream_index];
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MXFStreamContext *sc = st->priv_data;
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put_buffer(pb, sc->track_essence_element_key, 16); // write key
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klv_encode_ber_length(pb, pkt->size); // write length
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put_buffer(pb, pkt->data, pkt->size); // write value
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put_flush_packet(pb);
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return 0;
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}
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AVOutputFormat mxf_muxer = {
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"mxf",
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NULL_IF_CONFIG_SMALL("Material eXchange Format"),
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NULL,
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"mxf",
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sizeof(MXFContext),
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CODEC_ID_PCM_S16LE,
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CODEC_ID_MPEG2VIDEO,
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mux_write_header,
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mux_write_packet,
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mux_write_footer,
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};
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