/src/ffmpeg/libavformat/siff.c

Source
/*
 * 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 "demux.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;
    unsigned int pktsize;
    int gmcsize;
    unsigned int sndsize;

    unsigned int flags;
    uint8_t gmc[4];
} SIFFContext;

static int siff_probe(const 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->codecpar->codec_type            = AVMEDIA_TYPE_AUDIO;
    ast->codecpar->codec_id              = AV_CODEC_ID_PCM_U8;
    ast->codecpar->ch_layout             = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
    ast->codecpar->bits_per_coded_sample = 8;
    ast->codecpar->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->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codecpar->codec_id   = AV_CODEC_ID_VB;
    st->codecpar->codec_tag  = MKTAG('V', 'B', 'V', '1');
    st->codecpar->width      = width;
    st->codecpar->height     = height;
    st->codecpar->format     = 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)
        return create_audio_stream(s, c);
    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 ret;

    if (c->has_video) {
        unsigned int size;
        if (c->cur_frame >= c->frames)
            return AVERROR_EOF;
        if (c->curstrm == -1) {
            unsigned pktsize = avio_rl32(s->pb);
            if (pktsize < 4)
                return AVERROR_INVALIDDATA;
            c->pktsize = pktsize - 4;
            c->flags   = avio_rl16(s->pb);
            if (c->flags & VB_HAS_AUDIO && !c->has_audio)
                return AVERROR_INVALIDDATA;
            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) {
            if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
                return AVERROR_INVALIDDATA;

            size = c->pktsize - c->sndsize - c->gmcsize - 2;
            size = ffio_limit(s->pb, size);
            if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
                return ret;
            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) {
                return AVERROR_INVALIDDATA;
            }
            pkt->stream_index = 0;
            c->curstrm        = -1;
        } else {
            int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
            if (pktsize < 0)
                return AVERROR_INVALIDDATA;
            pkt->stream_index = 1;
            pkt->duration     = pktsize;
            c->curstrm        = 0;
        }
        if (!c->cur_frame || c->curstrm)
            pkt->flags |= AV_PKT_FLAG_KEY;
        if (c->curstrm == -1)
            c->cur_frame++;
    } else {
        int pktsize = av_get_packet(s->pb, pkt, c->block_align);
        if (!pktsize)
            return AVERROR_EOF;
        if (pktsize <= 0)
            return AVERROR_INVALIDDATA;
        pkt->duration = pktsize;
    }
    return pkt->size;
}

const FFInputFormat ff_siff_demuxer = {
    .p.name         = "siff",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
    .p.extensions   = "vb,son",
    .priv_data_size = sizeof(SIFFContext),
    .read_probe     = siff_probe,
    .read_header    = siff_read_header,
    .read_packet    = siff_read_packet,
};

Coverage Report

Created: 2026-09-14 08:00

Line	Count	Source
1		/*
2		* Beam Software SIFF demuxer
3		* Copyright (c) 2007 Konstantin Shishkov
4		*
5		* This file is part of FFmpeg.
6		*
7		* FFmpeg is free software; you can redistribute it and/or
8		* modify it under the terms of the GNU Lesser General Public
9		* License as published by the Free Software Foundation; either
10		* version 2.1 of the License, or (at your option) any later version.
11		*
12		* FFmpeg is distributed in the hope that it will be useful,
13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15		* Lesser General Public License for more details.
16		*
17		* You should have received a copy of the GNU Lesser General Public
18		* License along with FFmpeg; if not, write to the Free Software
19		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20		*/
21
22		#include "libavutil/channel_layout.h"
23		#include "libavutil/intreadwrite.h"
24
25		#include "avformat.h"
26		#include "demux.h"
27		#include "internal.h"
28		#include "avio_internal.h"
29
30		enum SIFFTags {
31		TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
32		TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
33		TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
34		TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
35		TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
36		TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
37		};
38
39		enum VBFlags {
40		VB_HAS_GMC = 0x01,
41		VB_HAS_AUDIO = 0x04,
42		VB_HAS_VIDEO = 0x08,
43		VB_HAS_PALETTE = 0x10,
44		VB_HAS_LENGTH = 0x20
45		};
46
47		typedef struct SIFFContext {
48		int frames;
49		int cur_frame;
50		int rate;
51		int bits;
52		int block_align;
53
54		int has_video;
55		int has_audio;
56
57		int curstrm;
58		unsigned int pktsize;
59		int gmcsize;
60		unsigned int sndsize;
61
62		unsigned int flags;
63		uint8_t gmc[4];
64		} SIFFContext;
65
66		static int siff_probe(const AVProbeData *p)
67	964k	{
68	964k	uint32_t tag = AV_RL32(p->buf + 8);
69		/* check file header */
70	964k	if (AV_RL32(p->buf) != TAG_SIFF \|\|
71	394	(tag != TAG_VBV1 && tag != TAG_SOUN))
72	964k	return 0;
73	121	return AVPROBE_SCORE_MAX;
74	964k	}
75
76		static int create_audio_stream(AVFormatContext s, SIFFContext c)
77	1.55k	{
78	1.55k	AVStream *ast;
79	1.55k	ast = avformat_new_stream(s, NULL);
80	1.55k	if (!ast)
81	0	return AVERROR(ENOMEM);
82	1.55k	ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
83	1.55k	ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
84	1.55k	ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
85	1.55k	ast->codecpar->bits_per_coded_sample = 8;
86	1.55k	ast->codecpar->sample_rate = c->rate;
87	1.55k	avpriv_set_pts_info(ast, 16, 1, c->rate);
88	1.55k	ast->start_time = 0;
89	1.55k	return 0;
90	1.55k	}
91
92		static int siff_parse_vbv1(AVFormatContext s, SIFFContext c, AVIOContext *pb)
93	1.09k	{
94	1.09k	AVStream *st;
95	1.09k	int width, height;
96
97	1.09k	if (avio_rl32(pb) != TAG_VBHD) {
98	63	av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
99	63	return AVERROR_INVALIDDATA;
100	63	}
101	1.03k	if (avio_rb32(pb) != 32) {
102	46	av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
103	46	return AVERROR_INVALIDDATA;
104	46	}
105	990	if (avio_rl16(pb) != 1) {
106	19	av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
107	19	return AVERROR_INVALIDDATA;
108	19	}
109	971	width = avio_rl16(pb);
110	971	height = avio_rl16(pb);
111	971	avio_skip(pb, 4);
112	971	c->frames = avio_rl16(pb);
113	971	if (!c->frames) {
114	11	av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
115	11	return AVERROR_INVALIDDATA;
116	11	}
117	960	c->bits = avio_rl16(pb);
118	960	c->rate = avio_rl16(pb);
119	960	c->block_align = c->rate * (c->bits >> 3);
120
121	960	avio_skip(pb, 16); // zeroes
122
123	960	st = avformat_new_stream(s, NULL);
124	960	if (!st)
125	0	return AVERROR(ENOMEM);
126	960	st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
127	960	st->codecpar->codec_id = AV_CODEC_ID_VB;
128	960	st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
129	960	st->codecpar->width = width;
130	960	st->codecpar->height = height;
131	960	st->codecpar->format = AV_PIX_FMT_PAL8;
132	960	st->nb_frames =
133	960	st->duration = c->frames;
134	960	avpriv_set_pts_info(st, 16, 1, 12);
135
136	960	c->cur_frame = 0;
137	960	c->has_video = 1;
138	960	c->has_audio = !!c->rate;
139	960	c->curstrm = -1;
140	960	if (c->has_audio)
141	904	return create_audio_stream(s, c);
142	56	return 0;
143	960	}
144
145		static int siff_parse_soun(AVFormatContext s, SIFFContext c, AVIOContext *pb)
146	748	{
147	748	if (avio_rl32(pb) != TAG_SHDR) {
148	61	av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
149	61	return AVERROR_INVALIDDATA;
150	61	}
151	687	if (avio_rb32(pb) != 8) {
152	41	av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
153	41	return AVERROR_INVALIDDATA;
154	41	}
155	646	avio_skip(pb, 4); // unknown value
156	646	c->rate = avio_rl16(pb);
157	646	c->bits = avio_rl16(pb);
158	646	c->block_align = c->rate * (c->bits >> 3);
159	646	return create_audio_stream(s, c);
160	687	}
161
162		static int siff_read_header(AVFormatContext *s)
163	2.14k	{
164	2.14k	AVIOContext *pb = s->pb;
165	2.14k	SIFFContext *c = s->priv_data;
166	2.14k	uint32_t tag;
167	2.14k	int ret;
168
169	2.14k	if (avio_rl32(pb) != TAG_SIFF)
170	191	return AVERROR_INVALIDDATA;
171	1.95k	avio_skip(pb, 4); // ignore size
172	1.95k	tag = avio_rl32(pb);
173
174	1.95k	if (tag != TAG_VBV1 && tag != TAG_SOUN) {
175	109	av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
176	109	return AVERROR_INVALIDDATA;
177	109	}
178
179	1.84k	if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
180	139	return ret;
181	1.70k	if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
182	102	return ret;
183	1.60k	if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
184	122	av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
185	122	return AVERROR_INVALIDDATA;
186	122	}
187	1.48k	avio_skip(pb, 4); // ignore size
188
189	1.48k	return 0;
190	1.60k	}
191
192		static int siff_read_packet(AVFormatContext s, AVPacket pkt)
193	53.3k	{
194	53.3k	SIFFContext *c = s->priv_data;
195	53.3k	int ret;
196
197	53.3k	if (c->has_video) {
198	18.3k	unsigned int size;
199	18.3k	if (c->cur_frame >= c->frames)
200	8	return AVERROR_EOF;
201	18.3k	if (c->curstrm == -1) {
202	12.0k	unsigned pktsize = avio_rl32(s->pb);
203	12.0k	if (pktsize < 4)
204	353	return AVERROR_INVALIDDATA;
205	11.6k	c->pktsize = pktsize - 4;
206	11.6k	c->flags = avio_rl16(s->pb);
207	11.6k	if (c->flags & VB_HAS_AUDIO && !c->has_audio)
208	18	return AVERROR_INVALIDDATA;
209	11.6k	c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
210	11.6k	if (c->gmcsize)
211	1.92k	avio_read(s->pb, c->gmc, c->gmcsize);
212	11.6k	c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
213	11.6k	c->curstrm = !!(c->flags & VB_HAS_AUDIO);
214	11.6k	}
215
216	17.9k	if (!c->curstrm) {
217	12.0k	if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
218	285	return AVERROR_INVALIDDATA;
219
220	11.8k	size = c->pktsize - c->sndsize - c->gmcsize - 2;
221	11.8k	size = ffio_limit(s->pb, size);
222	11.8k	if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
223	246	return ret;
224	11.5k	AV_WL16(pkt->data, c->flags);
225	11.5k	if (c->gmcsize)
226	1.85k	memcpy(pkt->data + 2, c->gmc, c->gmcsize);
227	11.5k	if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
228	625	return AVERROR_INVALIDDATA;
229	625	}
230	10.9k	pkt->stream_index = 0;
231	10.9k	c->curstrm = -1;
232	10.9k	} else {
233	5.87k	int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
234	5.87k	if (pktsize < 0)
235	197	return AVERROR_INVALIDDATA;
236	5.68k	pkt->stream_index = 1;
237	5.68k	pkt->duration = pktsize;
238	5.68k	c->curstrm = 0;
239	5.68k	}
240	16.6k	if (!c->cur_frame \|\| c->curstrm)
241	11.3k	pkt->flags \|= AV_PKT_FLAG_KEY;
242	16.6k	if (c->curstrm == -1)
243	10.9k	c->cur_frame++;
244	35.0k	} else {
245	35.0k	int pktsize = av_get_packet(s->pb, pkt, c->block_align);
246	35.0k	if (!pktsize)
247	49	return AVERROR_EOF;
248	35.0k	if (pktsize <= 0)
249	882	return AVERROR_INVALIDDATA;
250	34.1k	pkt->duration = pktsize;
251	34.1k	}
252	50.7k	return pkt->size;
253	53.3k	}
254
255		const FFInputFormat ff_siff_demuxer = {
256		.p.name = "siff",
257		.p.long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
258		.p.extensions = "vb,son",
259		.priv_data_size = sizeof(SIFFContext),
260		.read_probe = siff_probe,
261		.read_header = siff_read_header,
262		.read_packet = siff_read_packet,
263		};