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https://github.com/FFmpeg/FFmpeg.git
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avformat: add 3dostr demuxer
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
3b1939bb66
commit
e99321a3b6
@ -20,7 +20,7 @@ version <next>:
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- selectivecolor filter
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- extensive native AAC encoder improvements
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- ADPCM PSX decoder
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- genh, vag, xvag, ads, msf & svag demuxer
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- 3dostr, genh, vag, xvag, ads, msf & svag demuxer
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- zscale filter
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- wve demuxer
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- zero-copy Intel QSV transcoding in ffmpeg
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@ -223,6 +223,7 @@ library:
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@multitable @columnfractions .4 .1 .1 .4
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@item Name @tab Encoding @tab Decoding @tab Comments
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@item 3dostr @tab @tab X
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@item 4xm @tab @tab X
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@tab 4X Technologies format, used in some games.
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@item 8088flex TMV @tab @tab X
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168
libavformat/3dostr.c
Normal file
168
libavformat/3dostr.c
Normal file
@ -0,0 +1,168 @@
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/*
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* 3DO STR demuxer
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* Copyright (c) 2015 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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#include "avformat.h"
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#include "internal.h"
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static int threedostr_probe(AVProbeData *p)
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{
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if (memcmp(p->buf, "CTRL", 4) &&
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memcmp(p->buf, "SHDR", 4) &&
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memcmp(p->buf, "SNDS", 4))
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return 0;
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return AVPROBE_SCORE_MAX / 3 * 2;
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}
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static int threedostr_read_header(AVFormatContext *s)
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{
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unsigned chunk, codec = 0, size, ctrl_size = -1, found_shdr = 0;
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AVStream *st;
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while (!avio_feof(s->pb) && !found_shdr) {
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chunk = avio_rl32(s->pb);
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size = avio_rb32(s->pb);
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if (size < 8)
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return AVERROR_INVALIDDATA;
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size -= 8;
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switch (chunk) {
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case MKTAG('C','T','R','L'):
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ctrl_size = size;
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break;
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case MKTAG('S','N','D','S'):
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if (size < 56)
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return AVERROR_INVALIDDATA;
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avio_skip(s->pb, 8);
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if (avio_rl32(s->pb) != MKTAG('S','H','D','R'))
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return AVERROR_INVALIDDATA;
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avio_skip(s->pb, 24);
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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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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->sample_rate = avio_rb32(s->pb);
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st->codec->channels = avio_rb32(s->pb);
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if (st->codec->channels <= 0)
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return AVERROR_INVALIDDATA;
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codec = avio_rl32(s->pb);
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avio_skip(s->pb, 4);
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if (ctrl_size == 20 || ctrl_size == 3 || ctrl_size == -1)
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st->duration = (avio_rb32(s->pb) - 1) / st->codec->channels;
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else
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st->duration = avio_rb32(s->pb) * 16 / st->codec->channels;
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size -= 56;
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found_shdr = 1;
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break;
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case MKTAG('S','H','D','R'):
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if (size > 0x78) {
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avio_skip(s->pb, 0x74);
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size -= 0x78;
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if (avio_rl32(s->pb) == MKTAG('C','T','R','L') && size > 4) {
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ctrl_size = avio_rb32(s->pb);
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size -= 4;;
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}
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}
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break;
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default:
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av_log(s, AV_LOG_DEBUG, "skipping unknown chunk: %X\n", chunk);
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break;
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}
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avio_skip(s->pb, size);
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}
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switch (codec) {
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case MKTAG('S','D','X','2'):
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st->codec->codec_id = AV_CODEC_ID_SDX2_DPCM;
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st->codec->block_align = 1 * st->codec->channels;
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break;
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default:
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avpriv_request_sample(s, "codec %X", codec);
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return AVERROR_PATCHWELCOME;
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}
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avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
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return 0;
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}
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static int threedostr_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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unsigned chunk, size, found_ssmp = 0;
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AVStream *st = s->streams[0];
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int64_t pos;
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int ret = 0;
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while (!found_ssmp) {
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if (avio_feof(s->pb))
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return AVERROR_EOF;
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pos = avio_tell(s->pb);
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chunk = avio_rl32(s->pb);
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size = avio_rb32(s->pb);
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if (!size)
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continue;
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if (size < 8)
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return AVERROR_INVALIDDATA;
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size -= 8;
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switch (chunk) {
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case MKTAG('S','N','D','S'):
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if (size <= 16)
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return AVERROR_INVALIDDATA;
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avio_skip(s->pb, 8);
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if (avio_rl32(s->pb) != MKTAG('S','S','M','P'))
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return AVERROR_INVALIDDATA;
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avio_skip(s->pb, 4);
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size -= 16;
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ret = av_get_packet(s->pb, pkt, size);
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pkt->pos = pos;
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pkt->stream_index = 0;
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pkt->duration = size / st->codec->channels;
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size = 0;
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found_ssmp = 1;
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break;
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default:
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av_log(s, AV_LOG_DEBUG, "skipping unknown chunk: %X\n", chunk);
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break;
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}
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avio_skip(s->pb, size);
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}
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return ret;
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}
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AVInputFormat ff_threedostr_demuxer = {
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.name = "3dostr",
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.long_name = NULL_IF_CONFIG_SMALL("3DO STR"),
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.read_probe = threedostr_probe,
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.read_header = threedostr_read_header,
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.read_packet = threedostr_read_packet,
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.extensions = "str",
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.flags = AVFMT_GENERIC_INDEX,
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};
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@ -435,6 +435,7 @@ OBJS-$(CONFIG_TAK_DEMUXER) += takdec.o apetag.o img2.o rawdec.o
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OBJS-$(CONFIG_TEDCAPTIONS_DEMUXER) += tedcaptionsdec.o subtitles.o
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OBJS-$(CONFIG_TEE_MUXER) += tee.o
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OBJS-$(CONFIG_THP_DEMUXER) += thp.o
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OBJS-$(CONFIG_THREEDOSTR_DEMUXER) += 3dostr.o
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OBJS-$(CONFIG_TIERTEXSEQ_DEMUXER) += tiertexseq.o
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OBJS-$(CONFIG_MKVTIMESTAMP_V2_MUXER) += mkvtimestamp_v2.o
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OBJS-$(CONFIG_TMV_DEMUXER) += tmv.o
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@ -303,6 +303,7 @@ void av_register_all(void)
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REGISTER_MUXER (TG2, tg2);
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REGISTER_MUXER (TGP, tgp);
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REGISTER_DEMUXER (THP, thp);
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REGISTER_DEMUXER (THREEDOSTR, threedostr);
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REGISTER_DEMUXER (TIERTEXSEQ, tiertexseq);
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REGISTER_MUXER (MKVTIMESTAMP_V2, mkvtimestamp_v2);
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REGISTER_DEMUXER (TMV, tmv);
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFORMAT_VERSION_MAJOR 57
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#define LIBAVFORMAT_VERSION_MINOR 11
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#define LIBAVFORMAT_VERSION_MINOR 12
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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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