yading@11: /*
yading@11:  * Beam Software SIFF demuxer
yading@11:  * Copyright (c) 2007 Konstantin Shishkov
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/channel_layout.h"
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "avio_internal.h"
yading@11: 
yading@11: enum SIFFTags{
yading@11:     TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
yading@11:     TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
yading@11:     TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
yading@11:     TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
yading@11:     TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
yading@11:     TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
yading@11: };
yading@11: 
yading@11: enum VBFlags{
yading@11:     VB_HAS_GMC     = 0x01,
yading@11:     VB_HAS_AUDIO   = 0x04,
yading@11:     VB_HAS_VIDEO   = 0x08,
yading@11:     VB_HAS_PALETTE = 0x10,
yading@11:     VB_HAS_LENGTH  = 0x20
yading@11: };
yading@11: 
yading@11: typedef struct SIFFContext{
yading@11:     int frames;
yading@11:     int cur_frame;
yading@11:     int rate;
yading@11:     int bits;
yading@11:     int block_align;
yading@11: 
yading@11:     int has_video;
yading@11:     int has_audio;
yading@11: 
yading@11:     int curstrm;
yading@11:     int pktsize;
yading@11:     int gmcsize;
yading@11:     int sndsize;
yading@11: 
yading@11:     int flags;
yading@11:     uint8_t gmc[4];
yading@11: }SIFFContext;
yading@11: 
yading@11: static int siff_probe(AVProbeData *p)
yading@11: {
yading@11:     uint32_t tag = AV_RL32(p->buf + 8);
yading@11:     /* check file header */
yading@11:     if (AV_RL32(p->buf) != TAG_SIFF ||
yading@11:         (tag != TAG_VBV1 && tag != TAG_SOUN))
yading@11:         return 0;
yading@11:     return AVPROBE_SCORE_MAX;
yading@11: }
yading@11: 
yading@11: static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
yading@11: {
yading@11:     AVStream *ast;
yading@11:     ast = avformat_new_stream(s, NULL);
yading@11:     if (!ast)
yading@11:         return AVERROR(ENOMEM);
yading@11:     ast->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
yading@11:     ast->codec->codec_id        = AV_CODEC_ID_PCM_U8;
yading@11:     ast->codec->channels        = 1;
yading@11:     ast->codec->channel_layout  = AV_CH_LAYOUT_MONO;
yading@11:     ast->codec->bits_per_coded_sample = 8;
yading@11:     ast->codec->sample_rate     = c->rate;
yading@11:     avpriv_set_pts_info(ast, 16, 1, c->rate);
yading@11:     ast->start_time = 0;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
yading@11: {
yading@11:     AVStream *st;
yading@11:     int width, height;
yading@11: 
yading@11:     if (avio_rl32(pb) != TAG_VBHD){
yading@11:         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     if(avio_rb32(pb) != 32){
yading@11:         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     if(avio_rl16(pb) != 1){
yading@11:         av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     width = avio_rl16(pb);
yading@11:     height = avio_rl16(pb);
yading@11:     avio_skip(pb, 4);
yading@11:     c->frames = avio_rl16(pb);
yading@11:     if(!c->frames){
yading@11:         av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     c->bits = avio_rl16(pb);
yading@11:     c->rate = avio_rl16(pb);
yading@11:     c->block_align = c->rate * (c->bits >> 3);
yading@11: 
yading@11:     avio_skip(pb, 16); //zeroes
yading@11: 
yading@11:     st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return AVERROR(ENOMEM);
yading@11:     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@11:     st->codec->codec_id   = AV_CODEC_ID_VB;
yading@11:     st->codec->codec_tag  = MKTAG('V', 'B', 'V', '1');
yading@11:     st->codec->width      = width;
yading@11:     st->codec->height     = height;
yading@11:     st->codec->pix_fmt    = AV_PIX_FMT_PAL8;
yading@11:     st->nb_frames         =
yading@11:     st->duration          = c->frames;
yading@11:     avpriv_set_pts_info(st, 16, 1, 12);
yading@11: 
yading@11:     c->cur_frame = 0;
yading@11:     c->has_video = 1;
yading@11:     c->has_audio = !!c->rate;
yading@11:     c->curstrm = -1;
yading@11:     if (c->has_audio && create_audio_stream(s, c) < 0)
yading@11:         return AVERROR(ENOMEM);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
yading@11: {
yading@11:     if (avio_rl32(pb) != TAG_SHDR){
yading@11:         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     if(avio_rb32(pb) != 8){
yading@11:         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     avio_skip(pb, 4); //unknown value
yading@11:     c->rate = avio_rl16(pb);
yading@11:     c->bits = avio_rl16(pb);
yading@11:     c->block_align = c->rate * (c->bits >> 3);
yading@11:     return create_audio_stream(s, c);
yading@11: }
yading@11: 
yading@11: static int siff_read_header(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     SIFFContext *c = s->priv_data;
yading@11:     uint32_t tag;
yading@11:     int ret;
yading@11: 
yading@11:     if (avio_rl32(pb) != TAG_SIFF)
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     avio_skip(pb, 4); //ignore size
yading@11:     tag = avio_rl32(pb);
yading@11: 
yading@11:     if (tag != TAG_VBV1 && tag != TAG_SOUN){
yading@11:         av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11: 
yading@11:     if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
yading@11:         return ret;
yading@11:     if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
yading@11:         return ret;
yading@11:     if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')){
yading@11:         av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11:     avio_skip(pb, 4); //ignore size
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     SIFFContext *c = s->priv_data;
yading@11:     int size;
yading@11: 
yading@11:     if (c->has_video){
yading@11:         if (c->cur_frame >= c->frames)
yading@11:             return AVERROR_EOF;
yading@11:         if (c->curstrm == -1){
yading@11:             c->pktsize = avio_rl32(s->pb) - 4;
yading@11:             c->flags = avio_rl16(s->pb);
yading@11:             c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
yading@11:             if (c->gmcsize)
yading@11:                 avio_read(s->pb, c->gmc, c->gmcsize);
yading@11:             c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
yading@11:             c->curstrm = !!(c->flags & VB_HAS_AUDIO);
yading@11:         }
yading@11: 
yading@11:         if (!c->curstrm){
yading@11:             size = c->pktsize - c->sndsize - c->gmcsize - 2;
yading@11:             size = ffio_limit(s->pb, size);
yading@11:             if(size < 0 || c->pktsize < c->sndsize)
yading@11:                 return AVERROR_INVALIDDATA;
yading@11:             if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
yading@11:                 return AVERROR(ENOMEM);
yading@11:             AV_WL16(pkt->data, c->flags);
yading@11:             if (c->gmcsize)
yading@11:                 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
yading@11:             avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
yading@11:             pkt->stream_index = 0;
yading@11:             c->curstrm = -1;
yading@11:         }else{
yading@11:             if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0)
yading@11:                 return AVERROR(EIO);
yading@11:             pkt->stream_index = 1;
yading@11:             pkt->duration     = size;
yading@11:             c->curstrm = 0;
yading@11:         }
yading@11:         if(!c->cur_frame || c->curstrm)
yading@11:             pkt->flags |= AV_PKT_FLAG_KEY;
yading@11:         if (c->curstrm == -1)
yading@11:             c->cur_frame++;
yading@11:     }else{
yading@11:         size = av_get_packet(s->pb, pkt, c->block_align);
yading@11:         if(!size)
yading@11:             return AVERROR_EOF;
yading@11:         if(size < 0)
yading@11:             return AVERROR(EIO);
yading@11:         pkt->duration = size;
yading@11:     }
yading@11:     return pkt->size;
yading@11: }
yading@11: 
yading@11: AVInputFormat ff_siff_demuxer = {
yading@11:     .name           = "siff",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
yading@11:     .priv_data_size = sizeof(SIFFContext),
yading@11:     .read_probe     = siff_probe,
yading@11:     .read_header    = siff_read_header,
yading@11:     .read_packet    = siff_read_packet,
yading@11:     .extensions     = "vb,son",
yading@11: };