diff options
Diffstat (limited to 'ffmpeg1/libavformat/siff.c')
| -rw-r--r-- | ffmpeg1/libavformat/siff.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/siff.c b/ffmpeg1/libavformat/siff.c new file mode 100644 index 0000000..c8b68ab --- /dev/null +++ b/ffmpeg1/libavformat/siff.c @@ -0,0 +1,252 @@ +/* + * 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); + avio_read(s->pb, pkt->data + 2 + c->gmcsize, size); + 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", +}; |