mirror of
https://github.com/FFmpeg/FFmpeg.git
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280 lines
8.1 KiB
C
280 lines
8.1 KiB
C
/*
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* RAW demuxers
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2005 Alex Beregszaszi
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#include "avformat.h"
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#include "avio_internal.h"
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#include "rawdec.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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/* raw input */
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int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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AVStream *st;
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enum CodecID id;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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id = s->iformat->value;
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if (id == CODEC_ID_RAWVIDEO) {
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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} else {
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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}
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st->codec->codec_id = id;
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switch(st->codec->codec_type) {
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case AVMEDIA_TYPE_AUDIO: {
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RawAudioDemuxerContext *s1 = s->priv_data;
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#if FF_API_FORMAT_PARAMETERS
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if (ap->sample_rate)
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st->codec->sample_rate = ap->sample_rate;
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if (ap->channels)
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st->codec->channels = ap->channels;
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else st->codec->channels = 1;
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#endif
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if (s1->sample_rate)
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st->codec->sample_rate = s1->sample_rate;
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if (s1->channels)
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st->codec->channels = s1->channels;
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st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
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assert(st->codec->bits_per_coded_sample > 0);
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st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
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av_set_pts_info(st, 64, 1, st->codec->sample_rate);
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break;
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}
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case AVMEDIA_TYPE_VIDEO: {
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FFRawVideoDemuxerContext *s1 = s->priv_data;
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int width = 0, height = 0, ret;
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if(ap->time_base.num)
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av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
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else
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av_set_pts_info(st, 64, 1, 25);
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if (s1->video_size) {
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ret = av_parse_video_size(&width, &height, s1->video_size);
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av_freep(&s1->video_size);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
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return ret;
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}
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}
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#if FF_API_FORMAT_PARAMETERS
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if (ap->width > 0)
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width = ap->width;
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if (ap->height > 0)
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height = ap->height;
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#endif
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st->codec->width = width;
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st->codec->height = height;
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st->codec->pix_fmt = ap->pix_fmt;
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if(st->codec->pix_fmt == PIX_FMT_NONE)
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st->codec->pix_fmt= PIX_FMT_YUV420P;
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break;
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}
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default:
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return -1;
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}
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return 0;
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}
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#define RAW_PACKET_SIZE 1024
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int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size;
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size = RAW_PACKET_SIZE;
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if (av_new_packet(pkt, size) < 0)
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return AVERROR(ENOMEM);
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pkt->pos= avio_tell(s->pb);
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pkt->stream_index = 0;
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ret = ffio_read_partial(s->pb, pkt->data, size);
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if (ret < 0) {
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av_free_packet(pkt);
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return ret;
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}
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pkt->size = ret;
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return ret;
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}
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int ff_raw_audio_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = s->iformat->value;
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st->need_parsing = AVSTREAM_PARSE_FULL;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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/* MPEG-1/H.263 input */
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int ff_raw_video_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = s->iformat->value;
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st->need_parsing = AVSTREAM_PARSE_FULL;
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/* for MJPEG, specify frame rate */
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/* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
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if (ap->time_base.num) {
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st->codec->time_base= ap->time_base;
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} else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
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st->codec->codec_id == CODEC_ID_MPEG4 ||
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st->codec->codec_id == CODEC_ID_DIRAC ||
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st->codec->codec_id == CODEC_ID_DNXHD ||
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st->codec->codec_id == CODEC_ID_VC1 ||
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st->codec->codec_id == CODEC_ID_H264) {
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st->codec->time_base= (AVRational){1,25};
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}
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av_set_pts_info(st, 64, 1, 1200000);
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return 0;
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}
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/* Note: Do not forget to add new entries to the Makefile as well. */
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static const AVOption audio_options[] = {
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{ "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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{ "channels", "", offsetof(RawAudioDemuxerContext, channels), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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{ NULL },
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};
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const AVClass ff_rawaudio_demuxer_class = {
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.class_name = "rawaudio demuxer",
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.item_name = av_default_item_name,
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.option = audio_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption video_options[] = {
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{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
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{ NULL },
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};
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#undef OFFSET
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#undef DEC
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const AVClass ff_rawvideo_demuxer_class = {
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.class_name = "rawvideo demuxer",
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.item_name = av_default_item_name,
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.option = video_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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#if CONFIG_G722_DEMUXER
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AVInputFormat ff_g722_demuxer = {
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"g722",
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NULL_IF_CONFIG_SMALL("raw G.722"),
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sizeof(RawAudioDemuxerContext),
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NULL,
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ff_raw_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "g722,722",
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.value = CODEC_ID_ADPCM_G722,
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.priv_class = &ff_rawaudio_demuxer_class,
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};
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#endif
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#if CONFIG_GSM_DEMUXER
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AVInputFormat ff_gsm_demuxer = {
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"gsm",
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NULL_IF_CONFIG_SMALL("raw GSM"),
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0,
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NULL,
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ff_raw_audio_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "gsm",
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.value = CODEC_ID_GSM,
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};
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#endif
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#if CONFIG_MJPEG_DEMUXER
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FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg", CODEC_ID_MJPEG)
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#endif
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#if CONFIG_MLP_DEMUXER
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AVInputFormat ff_mlp_demuxer = {
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"mlp",
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NULL_IF_CONFIG_SMALL("raw MLP"),
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0,
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NULL,
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ff_raw_audio_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "mlp",
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.value = CODEC_ID_MLP,
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};
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#endif
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#if CONFIG_TRUEHD_DEMUXER
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AVInputFormat ff_truehd_demuxer = {
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"truehd",
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NULL_IF_CONFIG_SMALL("raw TrueHD"),
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0,
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NULL,
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ff_raw_audio_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "thd",
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.value = CODEC_ID_TRUEHD,
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};
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#endif
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#if CONFIG_SHORTEN_DEMUXER
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AVInputFormat ff_shorten_demuxer = {
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"shn",
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NULL_IF_CONFIG_SMALL("raw Shorten"),
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0,
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NULL,
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ff_raw_audio_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "shn",
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.value = CODEC_ID_SHORTEN,
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};
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#endif
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#if CONFIG_VC1_DEMUXER
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FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", CODEC_ID_VC1)
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#endif
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