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author | Fabrice Bellard <fabrice@bellard.org> | 2002-11-25 19:07:40 +0000 |
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committer | Fabrice Bellard <fabrice@bellard.org> | 2002-11-25 19:07:40 +0000 |
commit | abac6175916c57f59ddb51ffe41bfd1d9851fe38 (patch) | |
tree | 8fc5b70a143f0f74468c353afbf043d7e104cdc0 /libavformat/dv.c | |
parent | 57fc25764261abe71b6cf7571eca182f8acf5795 (diff) | |
download | ffmpeg-streaming-abac6175916c57f59ddb51ffe41bfd1d9851fe38.zip ffmpeg-streaming-abac6175916c57f59ddb51ffe41bfd1d9851fe38.tar.gz |
renamed libav to libavformat
Originally committed as revision 1276 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/dv.c')
-rw-r--r-- | libavformat/dv.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/libavformat/dv.c b/libavformat/dv.c new file mode 100644 index 0000000..1f152a2 --- /dev/null +++ b/libavformat/dv.c @@ -0,0 +1,134 @@ +/* + * Raw DV format + * Copyright (c) 2002 Fabrice Bellard. + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include "avformat.h" + +#define NTSC_FRAME_SIZE 120000 +#define PAL_FRAME_SIZE 144000 + +typedef struct DVDemuxContext { + int is_audio; +} DVDemuxContext; + +/* raw input */ +static int dv_read_header(AVFormatContext *s, + AVFormatParameters *ap) +{ + AVStream *vst, *ast; + + vst = av_new_stream(s, 0); + if (!vst) + return AVERROR_NOMEM; + vst->codec.codec_type = CODEC_TYPE_VIDEO; + vst->codec.codec_id = CODEC_ID_DVVIDEO; + +#if 0 + ast = av_new_stream(s, 1); + if (!ast) + return AVERROR_NOMEM; + + ast->codec.codec_type = CODEC_TYPE_AUDIO; + ast->codec.codec_id = CODEC_ID_DVAUDIO; +#endif + return 0; +} + +/* XXX: build fake audio stream when DV audio decoder will be finished */ +static int dv_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + int ret, size, dsf; + uint8_t buf[4]; + + ret = get_buffer(&s->pb, buf, 4); + if (ret <= 0) + return -EIO; + dsf = buf[3] & 0x80; + if (!dsf) + size = NTSC_FRAME_SIZE; + else + size = PAL_FRAME_SIZE; + + if (av_new_packet(pkt, size) < 0) + return -EIO; + + pkt->stream_index = 0; + memcpy(pkt->data, buf, 4); + ret = get_buffer(&s->pb, pkt->data + 4, size - 4); + if (ret <= 0) { + av_free_packet(pkt); + return -EIO; + } + return ret; +} + +static int dv_read_close(AVFormatContext *s) +{ + return 0; +} + +static AVInputFormat dv_iformat = { + "dv", + "DV video format", + sizeof(DVDemuxContext), + NULL, + dv_read_header, + dv_read_packet, + dv_read_close, + .extensions = "dv", +}; + +#if 0 +int dv_write_header(struct AVFormatContext *s) +{ + return 0; +} + +int dv_write_packet(struct AVFormatContext *s, + int stream_index, + unsigned char *buf, int size, int force_pts) +{ + put_buffer(&s->pb, buf, size); + put_flush_packet(&s->pb); + return 0; +} + +int dv_write_trailer(struct AVFormatContext *s) +{ + return 0; +} + +AVOutputFormat dv_oformat = { + "dv", + "DV video format", + NULL, + "dv", + 0, + CODEC_ID_DVVIDEO, + CODEC_ID_DVAUDIO, + dv_write_header, + dv_write_packet, + dv_write_trailer, +}; +#endif + +int dv_init(void) +{ + av_register_input_format(&dv_iformat); + // av_register_output_format(&dv_oformat); + return 0; +} |