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