mirror of https://git.ffmpeg.org/ffmpeg.git
251 lines
7.5 KiB
C
251 lines
7.5 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 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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#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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#include "libavutil/pixdesc.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 = avformat_new_stream(s, NULL);
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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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st->codec->channels = 1;
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if (id == CODEC_ID_ADPCM_G722)
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st->codec->sample_rate = 16000;
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if (s1 && s1->sample_rate)
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st->codec->sample_rate = s1->sample_rate;
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if (st->codec->sample_rate <= 0) {
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av_log(s, AV_LOG_ERROR, "Invalid sample rate %d specified\n",
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st->codec->sample_rate);
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return AVERROR(EINVAL);
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}
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if (s1 && 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 = 0;
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enum PixelFormat pix_fmt;
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AVRational framerate;
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if (s1->video_size && (ret = av_parse_video_size(&width, &height, s1->video_size)) < 0) {
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av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
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goto fail;
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}
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if ((pix_fmt = av_get_pix_fmt(s1->pixel_format)) == PIX_FMT_NONE) {
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av_log(s, AV_LOG_ERROR, "No such pixel format: %s.\n", s1->pixel_format);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
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av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
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goto fail;
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}
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av_set_pts_info(st, 64, framerate.den, framerate.num);
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st->codec->width = width;
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st->codec->height = height;
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st->codec->pix_fmt = pix_fmt;
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fail:
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return ret;
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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 = avformat_new_stream(s, NULL);
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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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st->start_time = 0;
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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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FFRawVideoDemuxerContext *s1 = s->priv_data;
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AVRational framerate;
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int ret = 0;
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st = avformat_new_stream(s, NULL);
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if (!st) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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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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if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
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av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
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goto fail;
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}
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st->codec->time_base = (AVRational){framerate.den, framerate.num};
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av_set_pts_info(st, 64, 1, 1200000);
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fail:
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return ret;
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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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#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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const AVOption ff_rawvideo_options[] = {
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{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC},
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{ NULL },
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};
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#if CONFIG_G722_DEMUXER
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AVInputFormat ff_g722_demuxer = {
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.name = "g722",
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.long_name = NULL_IF_CONFIG_SMALL("raw G.722"),
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.read_header = ff_raw_read_header,
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.read_packet = 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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};
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#endif
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#if CONFIG_LATM_DEMUXER
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AVInputFormat ff_latm_demuxer = {
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.name = "latm",
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.long_name = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
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.read_header = ff_raw_audio_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "latm",
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.value = CODEC_ID_AAC_LATM,
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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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.name = "mlp",
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.long_name = NULL_IF_CONFIG_SMALL("raw MLP"),
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.read_header = ff_raw_audio_read_header,
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.read_packet = 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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.name = "truehd",
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.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"),
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.read_header = ff_raw_audio_read_header,
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.read_packet = 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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.name = "shn",
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.long_name = NULL_IF_CONFIG_SMALL("raw Shorten"),
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.read_header = ff_raw_audio_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,
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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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