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lavf: Add SMJPEG demuxer.
Signed-off-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Paul B Mahol
Michael Niedermayer
parent
9eae8396f1
commit
a4209ad631
@ -6,6 +6,7 @@ version next:
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- v410 Quicktime Uncompressed 4:4:4 10-bit encoder and decoder
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- SBaGen (SBG) binaural beats script demuxer
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- OpenMG Audio muxer
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- SMJPEG demuxer
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version 0.9:
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@ -317,6 +317,7 @@ library:
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@tab Used in Sierra CD-ROM games.
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@item Smacker @tab @tab X
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@tab Multimedia format used by many games.
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@item SMJPEG @tab @tab X
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@item Sony OpenMG (OMA) @tab X @tab X
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@tab Audio format used in Sony Sonic Stage and Sony Vegas.
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@item Sony PlayStation STR @tab @tab X
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@ -289,6 +289,7 @@ OBJS-$(CONFIG_SEGMENT_MUXER) += segment.o
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OBJS-$(CONFIG_SHORTEN_DEMUXER) += rawdec.o
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OBJS-$(CONFIG_SIFF_DEMUXER) += siff.o
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OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o
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OBJS-$(CONFIG_SMJPEG_DEMUXER) += smjpeg.o
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OBJS-$(CONFIG_SOL_DEMUXER) += sol.o pcm.o
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OBJS-$(CONFIG_SOX_DEMUXER) += soxdec.o pcm.o
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OBJS-$(CONFIG_SOX_MUXER) += soxenc.o
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@ -212,6 +212,7 @@ void av_register_all(void)
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REGISTER_DEMUXER (SHORTEN, shorten);
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REGISTER_DEMUXER (SIFF, siff);
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REGISTER_DEMUXER (SMACKER, smacker);
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REGISTER_DEMUXER (SMJPEG, smjpeg);
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REGISTER_DEMUXER (SOL, sol);
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REGISTER_MUXDEMUX (SOX, sox);
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REGISTER_MUXDEMUX (SPDIF, spdif);
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183
libavformat/smjpeg.c
Normal file
183
libavformat/smjpeg.c
Normal file
@ -0,0 +1,183 @@
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/*
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* SMJPEG demuxer
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* Copyright (c) 2011 Paul B Mahol
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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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/**
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* @file
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* This is a demuxer for Loki SDL MJPEG files
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "riff.h"
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static const AVCodecTag codec_smjpeg_tags[] = {
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{ CODEC_ID_ADPCM_IMA_SMJPEG, MKTAG('A', 'P', 'C', 'M') },
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{ CODEC_ID_PCM_S16LE, MKTAG('N', 'O', 'N', 'E') },
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{ CODEC_ID_MJPEG, MKTAG('J', 'F', 'I', 'F') },
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{ CODEC_ID_NONE, 0 },
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};
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typedef struct SMJPEGContext {
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int audio_stream_index;
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int video_stream_index;
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} SMJPEGContext;
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static int smjpeg_probe(AVProbeData *p)
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{
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if (!memcmp(p->buf, "\x0\xaSMJPEG", 8))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int smjpeg_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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SMJPEGContext *sc = s->priv_data;
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AVStream *ast = NULL, *vst = NULL;
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AVIOContext *pb = s->pb;
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uint32_t version, htype, hlength, duration;
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char *comment;
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avio_skip(pb, 8); // magic
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version = avio_rb32(pb);
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if (version) {
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av_log_ask_for_sample(s, "unknown version %d\n", version);
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}
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duration = avio_rb32(pb); // in msec
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while (!pb->eof_reached) {
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htype = avio_rl32(pb);
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switch (htype) {
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case MKTAG('_', 'T', 'X', 'T'):
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hlength = avio_rb32(pb);
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if (!hlength || hlength > 512)
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return AVERROR_INVALIDDATA;
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comment = av_malloc(hlength + 1);
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if (!comment)
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return AVERROR(ENOMEM);
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if (avio_read(pb, comment, hlength) != hlength) {
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av_freep(&comment);
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av_log(s, AV_LOG_ERROR, "error when reading comment\n");
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return AVERROR_INVALIDDATA;
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}
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comment[hlength] = 0;
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av_dict_set(&s->metadata, "comment", comment,
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AV_DICT_DONT_STRDUP_VAL);
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break;
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case MKTAG('_', 'S', 'N', 'D'):
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if (ast) {
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av_log_ask_for_sample(s, "multiple audio streams not supported\n");
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return AVERROR_INVALIDDATA;
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}
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hlength = avio_rb32(pb);
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if (hlength < 8)
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return AVERROR_INVALIDDATA;
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ast = avformat_new_stream(s, 0);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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ast->codec->sample_rate = avio_rb16(pb);
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ast->codec->bits_per_coded_sample = avio_r8(pb);
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ast->codec->channels = avio_r8(pb);
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ast->codec->codec_tag = avio_rl32(pb);
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ast->codec->codec_id = ff_codec_get_id(codec_smjpeg_tags,
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ast->codec->codec_tag);
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ast->duration = duration;
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sc->audio_stream_index = ast->index;
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avpriv_set_pts_info(ast, 32, 1, 1000);
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avio_skip(pb, hlength - 8);
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break;
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case MKTAG('_', 'V', 'I', 'D'):
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if (vst) {
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av_log_ask_for_sample(s, "multiple video streams not supported\n");
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return AVERROR_INVALIDDATA;
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}
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hlength = avio_rb32(pb);
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if (hlength < 12)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4); // number of frames
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vst = avformat_new_stream(s, 0);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codec->width = avio_rb16(pb);
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vst->codec->height = avio_rb16(pb);
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vst->codec->codec_tag = avio_rl32(pb);
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vst->codec->codec_id = ff_codec_get_id(codec_smjpeg_tags,
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vst->codec->codec_tag);
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vst->duration = duration;
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sc->video_stream_index = vst->index;
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avpriv_set_pts_info(vst, 32, 1, 1000);
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avio_skip(pb, hlength - 12);
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break;
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case MKTAG('H', 'E', 'N', 'D'):
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return 0;
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default:
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av_log(s, AV_LOG_ERROR, "unknown header %x\n", htype);
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return AVERROR_INVALIDDATA;
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}
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}
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return AVERROR_EOF;
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}
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static int smjpeg_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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SMJPEGContext *sc = s->priv_data;
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uint32_t dtype, ret, size, timestamp;
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if (s->pb->eof_reached)
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return AVERROR_EOF;
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dtype = avio_rl32(s->pb);
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switch (dtype) {
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case MKTAG('s', 'n', 'd', 'D'):
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timestamp = avio_rb32(s->pb);
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size = avio_rb32(s->pb);
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ret = av_get_packet(s->pb, pkt, size);
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pkt->stream_index = sc->audio_stream_index;
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pkt->pts = timestamp;
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break;
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case MKTAG('v', 'i', 'd', 'D'):
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timestamp = avio_rb32(s->pb);
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size = avio_rb32(s->pb);
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ret = av_get_packet(s->pb, pkt, size);
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pkt->stream_index = sc->video_stream_index;
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pkt->pts = timestamp;
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break;
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case MKTAG('D', 'O', 'N', 'E'):
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ret = AVERROR_EOF;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "unknown chunk %x\n", dtype);
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ret = AVERROR_INVALIDDATA;
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break;
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}
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return ret;
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}
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AVInputFormat ff_smjpeg_demuxer = {
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.name = "smjpeg",
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.long_name = NULL_IF_CONFIG_SMALL("Loki SDL MJPEG"),
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.priv_data_size = sizeof(SMJPEGContext),
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.read_probe = smjpeg_probe,
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.read_header = smjpeg_read_header,
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.read_packet = smjpeg_read_packet,
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.extensions = "mjpg",
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};
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@ -30,7 +30,7 @@
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#include "libavutil/avutil.h"
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#define LIBAVFORMAT_VERSION_MAJOR 53
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#define LIBAVFORMAT_VERSION_MINOR 27
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#define LIBAVFORMAT_VERSION_MINOR 28
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#define LIBAVFORMAT_VERSION_MICRO 100
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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