diff options
Diffstat (limited to 'ffmpeg1/libavformat/rawdec.c')
| -rw-r--r-- | ffmpeg1/libavformat/rawdec.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/rawdec.c b/ffmpeg1/libavformat/rawdec.c new file mode 100644 index 0000000..07c2782 --- /dev/null +++ b/ffmpeg1/libavformat/rawdec.c @@ -0,0 +1,162 @@ +/* + * RAW demuxers + * Copyright (c) 2001 Fabrice Bellard + * Copyright (c) 2005 Alex Beregszaszi + * + * 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 + */ + +#include "avformat.h" +#include "internal.h" +#include "avio_internal.h" +#include "rawdec.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" +#include "libavutil/pixdesc.h" +#include "libavutil/avassert.h" + +#define RAW_PACKET_SIZE 1024 + +int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt) +{ + int ret, size; + + size = RAW_PACKET_SIZE; + + if (av_new_packet(pkt, size) < 0) + return AVERROR(ENOMEM); + + pkt->pos= avio_tell(s->pb); + pkt->stream_index = 0; + ret = ffio_read_partial(s->pb, pkt->data, size); + if (ret < 0) { + av_free_packet(pkt); + return ret; + } + av_shrink_packet(pkt, ret); + return ret; +} + +int ff_raw_audio_read_header(AVFormatContext *s) +{ + AVStream *st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_id = s->iformat->raw_codec_id; + st->need_parsing = AVSTREAM_PARSE_FULL_RAW; + st->start_time = 0; + /* the parameters will be extracted from the compressed bitstream */ + + return 0; +} + +/* MPEG-1/H.263 input */ +int ff_raw_video_read_header(AVFormatContext *s) +{ + AVStream *st; + FFRawVideoDemuxerContext *s1 = s->priv_data; + AVRational framerate; + int ret = 0; + + + st = avformat_new_stream(s, NULL); + if (!st) { + ret = AVERROR(ENOMEM); + goto fail; + } + + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + st->codec->codec_id = s->iformat->raw_codec_id; + st->need_parsing = AVSTREAM_PARSE_FULL_RAW; + + if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) { + av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate); + goto fail; + } + + st->codec->time_base = av_inv_q(framerate); + avpriv_set_pts_info(st, 64, 1, 1200000); + +fail: + return ret; +} + +/* Note: Do not forget to add new entries to the Makefile as well. */ + +#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x) +#define DEC AV_OPT_FLAG_DECODING_PARAM +const AVOption ff_rawvideo_options[] = { + { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC}, + { NULL }, +}; + +#if CONFIG_LATM_DEMUXER +AVInputFormat ff_latm_demuxer = { + .name = "latm", + .long_name = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"), + .read_header = ff_raw_audio_read_header, + .read_packet = ff_raw_read_partial_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "latm", + .raw_codec_id = AV_CODEC_ID_AAC_LATM, +}; +#endif + +#if CONFIG_MJPEG_DEMUXER +FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG) +#endif + +#if CONFIG_MLP_DEMUXER +AVInputFormat ff_mlp_demuxer = { + .name = "mlp", + .long_name = NULL_IF_CONFIG_SMALL("raw MLP"), + .read_header = ff_raw_audio_read_header, + .read_packet = ff_raw_read_partial_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "mlp", + .raw_codec_id = AV_CODEC_ID_MLP, +}; +#endif + +#if CONFIG_TRUEHD_DEMUXER +AVInputFormat ff_truehd_demuxer = { + .name = "truehd", + .long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"), + .read_header = ff_raw_audio_read_header, + .read_packet = ff_raw_read_partial_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "thd", + .raw_codec_id = AV_CODEC_ID_TRUEHD, +}; +#endif + +#if CONFIG_SHORTEN_DEMUXER +AVInputFormat ff_shorten_demuxer = { + .name = "shn", + .long_name = NULL_IF_CONFIG_SMALL("raw Shorten"), + .read_header = ff_raw_audio_read_header, + .read_packet = ff_raw_read_partial_packet, + .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK, + .extensions = "shn", + .raw_codec_id = AV_CODEC_ID_SHORTEN, +}; +#endif + +#if CONFIG_VC1_DEMUXER +FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1) +#endif |