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101 lines
2.9 KiB
101 lines
2.9 KiB
/* |
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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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