diff options
Diffstat (limited to 'libavformat')
-rw-r--r-- | libavformat/mxfenc.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c new file mode 100644 index 0000000000..913d984ae7 --- /dev/null +++ b/libavformat/mxfenc.c @@ -0,0 +1,101 @@ +/* + * MXF muxer + * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com> + * + * 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 + */ + +/* + * References + * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value + * SMPTE 377M MXF File Format Specifications + * SMPTE 379M MXF Generic Container + * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container + * SMPTE RP210: SMPTE Metadata Dictionary + * SMPTE RP224: Registry of SMPTE Universal Labels + */ + +//#define DEBUG + +static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type) +{ + const MXFCodecUL *uls = mxf_essence_container_uls; + while (uls->id != CODEC_ID_NONE) { + if (uls->id == type) + break; + uls++; + } + return uls; +} + +static void mxf_free(AVFormatContext *s) +{ + MXFContext *mxf = s->priv_data; + AVStream *st; + int i; + + av_freep(&mxf->reference.identification); + av_freep(mxf->reference.package); + av_freep(&mxf->reference.package); + av_freep(&mxf->reference.content_storage); + for (i = 0; i < s->nb_streams; i++) { + st = s->streams[i]; + av_freep(&st->priv_data); + } + av_freep(mxf->reference.sub_desc); + av_freep(&mxf->reference.sub_desc); + av_freep(&mxf->reference.mul_desc); + av_freep(&mxf->essence_container_uls); +} + +static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type) +{ + const MXFDataDefinitionUL *uls = mxf_data_definition_uls; + while (uls->type != CODEC_TYPE_DATA) { + if (type == uls->type) + break; + uls ++; + } + return uls; +} + +static int mux_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + ByteIOContext *pb = s->pb; + AVStream *st = s->streams[pkt->stream_index]; + MXFStreamContext *sc = st->priv_data; + + put_buffer(pb, sc->track_essence_element_key, 16); // write key + klv_encode_ber_length(pb, pkt->size); // write length + put_buffer(pb, pkt->data, pkt->size); // write value + + put_flush_packet(pb); + return 0; +} + +AVOutputFormat mxf_muxer = { + "mxf", + NULL_IF_CONFIG_SMALL("Material eXchange Format"), + NULL, + "mxf", + sizeof(MXFContext), + CODEC_ID_PCM_S16LE, + CODEC_ID_MPEG2VIDEO, + mux_write_header, + mux_write_packet, + mux_write_footer, +}; |