[deb_ffmpeg.git] / ffmpeg / libavformat / jvdec.c

/*
 * Bitmap Brothers JV demuxer
 * Copyright (c) 2005, 2011 Peter Ross <pross@xvid.org>
 *
 * 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
 */

/**
 * @file
 * Bitmap Brothers JV demuxer
 * @author Peter Ross <pross@xvid.org>
 */

#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"

#include "avformat.h"
#include "internal.h"

#define JV_PREAMBLE_SIZE 5

typedef struct {
    int audio_size;    /**< audio packet size (bytes) */
    int video_size;    /**< video packet size (bytes) */
    int palette_size;  /**< palette size (bytes) */
    int video_type;    /**< per-frame video compression type */
} JVFrame;

typedef struct {
    JVFrame *frames;
    enum {
        JV_AUDIO = 0,
        JV_VIDEO,
        JV_PADDING
    } state;
    int64_t pts;
} JVDemuxContext;

#define MAGIC " Compression by John M Phillips Copyright (C) 1995 The Bitmap Brothers Ltd."

static int read_probe(AVProbeData *pd)
{
    if (pd->buf[0] == 'J' && pd->buf[1] == 'V' && strlen(MAGIC) <= pd->buf_size - 4 &&
        !memcmp(pd->buf + 4, MAGIC, strlen(MAGIC)))
        return AVPROBE_SCORE_MAX;
    return 0;
}

static int read_close(AVFormatContext *s)
{
    JVDemuxContext *jv = s->priv_data;

    av_freep(&jv->frames);

    return 0;
}

static int read_header(AVFormatContext *s)
{
    JVDemuxContext *jv = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *vst, *ast;
    int64_t audio_pts = 0;
    int64_t offset;
    int i;

    avio_skip(pb, 80);

    ast = avformat_new_stream(s, NULL);
    vst = avformat_new_stream(s, NULL);
    if (!ast || !vst)
        return AVERROR(ENOMEM);

    vst->codec->codec_type  = AVMEDIA_TYPE_VIDEO;
    vst->codec->codec_id    = AV_CODEC_ID_JV;
    vst->codec->codec_tag   = 0; /* no fourcc */
    vst->codec->width       = avio_rl16(pb);
    vst->codec->height      = avio_rl16(pb);
    vst->duration           =
    vst->nb_frames          =
    ast->nb_index_entries   = avio_rl16(pb);
    avpriv_set_pts_info(vst, 64, avio_rl16(pb), 1000);

    avio_skip(pb, 4);

    ast->codec->codec_type     = AVMEDIA_TYPE_AUDIO;
    ast->codec->codec_id       = AV_CODEC_ID_PCM_U8;
    ast->codec->codec_tag      = 0; /* no fourcc */
    ast->codec->sample_rate    = avio_rl16(pb);
    ast->codec->channels       = 1;
    ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
    avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);

    avio_skip(pb, 10);

    ast->index_entries = av_malloc(ast->nb_index_entries *
                                   sizeof(*ast->index_entries));
    if (!ast->index_entries)
        return AVERROR(ENOMEM);

    jv->frames = av_malloc(ast->nb_index_entries * sizeof(JVFrame));
    if (!jv->frames)
        return AVERROR(ENOMEM);

    offset = 0x68 + ast->nb_index_entries * 16;
    for (i = 0; i < ast->nb_index_entries; i++) {
        AVIndexEntry *e   = ast->index_entries + i;
        JVFrame      *jvf = jv->frames + i;

        /* total frame size including audio, video, palette data and padding */
        e->size      = avio_rl32(pb);
        e->timestamp = i;
        e->pos       = offset;
        offset      += e->size;

        jvf->audio_size   = avio_rl32(pb);
        jvf->video_size   = avio_rl32(pb);
        jvf->palette_size = avio_r8(pb) ? 768 : 0;

        if ((jvf->video_size | jvf->audio_size) & ~0xFFFFFF ||
            e->size - jvf->audio_size
                    - jvf->video_size
                    - jvf->palette_size < 0) {
            if (s->error_recognition & AV_EF_EXPLODE) {
                read_close(s);
                return AVERROR_INVALIDDATA;
            }
            jvf->audio_size   =
            jvf->video_size   =
            jvf->palette_size = 0;
        }

        if (avio_r8(pb))
            av_log(s, AV_LOG_WARNING, "unsupported audio codec\n");

        jvf->video_type = avio_r8(pb);
        avio_skip(pb, 1);

        e->timestamp = jvf->audio_size ? audio_pts : AV_NOPTS_VALUE;
        audio_pts   += jvf->audio_size;

        e->flags = jvf->video_type != 1 ? AVINDEX_KEYFRAME : 0;
    }

    jv->state = JV_AUDIO;
    return 0;
}

static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
    JVDemuxContext *jv = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *ast = s->streams[0];

    while (!avio_feof(s->pb) && jv->pts < ast->nb_index_entries) {
        const AVIndexEntry *e   = ast->index_entries + jv->pts;
        const JVFrame      *jvf = jv->frames + jv->pts;

        switch (jv->state) {
        case JV_AUDIO:
            jv->state++;
            if (jvf->audio_size) {
                if (av_get_packet(s->pb, pkt, jvf->audio_size) < 0)
                    return AVERROR(ENOMEM);
                pkt->stream_index = 0;
                pkt->pts          = e->timestamp;
                pkt->flags       |= AV_PKT_FLAG_KEY;
                return 0;
            }
        case JV_VIDEO:
            jv->state++;
            if (jvf->video_size || jvf->palette_size) {
                int ret;
                int size = jvf->video_size + jvf->palette_size;
                if (av_new_packet(pkt, size + JV_PREAMBLE_SIZE))
                    return AVERROR(ENOMEM);

                AV_WL32(pkt->data, jvf->video_size);
                pkt->data[4] = jvf->video_type;
                ret = avio_read(pb, pkt->data + JV_PREAMBLE_SIZE, size);
                if (ret < 0)
                    return ret;
                if (ret < size) {
                    memset(pkt->data + JV_PREAMBLE_SIZE + ret, 0,
                           FF_INPUT_BUFFER_PADDING_SIZE);
                    pkt->flags |= AV_PKT_FLAG_CORRUPT;
                }
                pkt->size         = ret + JV_PREAMBLE_SIZE;
                pkt->stream_index = 1;
                pkt->pts          = jv->pts;
                if (jvf->video_type != 1)
                    pkt->flags |= AV_PKT_FLAG_KEY;
                return 0;
            }
        case JV_PADDING:
            avio_skip(pb, FFMAX(e->size - jvf->audio_size - jvf->video_size
                                        - jvf->palette_size, 0));
            jv->state = JV_AUDIO;
            jv->pts++;
        }
    }

    if (s->pb->eof_reached)
        return AVERROR_EOF;

    return AVERROR(EIO);
}

static int read_seek(AVFormatContext *s, int stream_index,
                     int64_t ts, int flags)
{
    JVDemuxContext *jv = s->priv_data;
    AVStream *ast = s->streams[0];
    int i;

    if (flags & (AVSEEK_FLAG_BYTE | AVSEEK_FLAG_FRAME))
        return AVERROR(ENOSYS);

    switch (stream_index) {
    case 0:
        i = av_index_search_timestamp(ast, ts, flags);
        break;
    case 1:
        i = ts;
        break;
    default:
        return 0;
    }

    if (i < 0 || i >= ast->nb_index_entries)
        return 0;
    if (avio_seek(s->pb, ast->index_entries[i].pos, SEEK_SET) < 0)
        return -1;

    jv->state = JV_AUDIO;
    jv->pts   = i;
    return 0;
}

AVInputFormat ff_jv_demuxer = {
    .name           = "jv",
    .long_name      = NULL_IF_CONFIG_SMALL("Bitmap Brothers JV"),
    .priv_data_size = sizeof(JVDemuxContext),
    .read_probe     = read_probe,
    .read_header    = read_header,
    .read_packet    = read_packet,
    .read_seek      = read_seek,
    .read_close     = read_close,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Bitmap Brothers JV demuxer
	3	* Copyright (c) 2005, 2011 Peter Ross <pross@xvid.org>
	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	/**
	23	* @file
	24	* Bitmap Brothers JV demuxer
	25	* @author Peter Ross <pross@xvid.org>
	26	*/
	27
	28	#include "libavutil/channel_layout.h"
	29	#include "libavutil/intreadwrite.h"
	30
	31	#include "avformat.h"
	32	#include "internal.h"
	33
	34	#define JV_PREAMBLE_SIZE 5
	35
	36	typedef struct {
	37	int audio_size; /*< audio packet size (bytes) /
	38	int video_size; /*< video packet size (bytes) /
	39	int palette_size; /*< palette size (bytes) /
	40	int video_type; /*< per-frame video compression type /
	41	} JVFrame;
	42
	43	typedef struct {
	44	JVFrame *frames;
	45	enum {
	46	JV_AUDIO = 0,
	47	JV_VIDEO,
	48	JV_PADDING
	49	} state;
	50	int64_t pts;
	51	} JVDemuxContext;
	52
	53	#define MAGIC " Compression by John M Phillips Copyright (C) 1995 The Bitmap Brothers Ltd."
	54
	55	static int read_probe(AVProbeData *pd)
	56	{
	57	if (pd->buf[0] == 'J' && pd->buf[1] == 'V' && strlen(MAGIC) <= pd->buf_size - 4 &&
	58	!memcmp(pd->buf + 4, MAGIC, strlen(MAGIC)))
	59	return AVPROBE_SCORE_MAX;
	60	return 0;
	61	}
	62
	63	static int read_close(AVFormatContext *s)
	64	{
65	JVDemuxContext *jv = s->priv_data;
66
67	av_freep(&jv->frames);
68
69	return 0;
70	}
71
72	static int read_header(AVFormatContext *s)
73	{
74	JVDemuxContext *jv = s->priv_data;
75	AVIOContext *pb = s->pb;
76	AVStream vst, ast;
77	int64_t audio_pts = 0;
78	int64_t offset;
79	int i;
80
81	avio_skip(pb, 80);
82
83	ast = avformat_new_stream(s, NULL);
84	vst = avformat_new_stream(s, NULL);
85	if (!ast \|\| !vst)
86	return AVERROR(ENOMEM);
87
88	vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
89	vst->codec->codec_id = AV_CODEC_ID_JV;
90	vst->codec->codec_tag = 0; /* no fourcc */
91	vst->codec->width = avio_rl16(pb);
92	vst->codec->height = avio_rl16(pb);
93	vst->duration =
94	vst->nb_frames =
95	ast->nb_index_entries = avio_rl16(pb);
96	avpriv_set_pts_info(vst, 64, avio_rl16(pb), 1000);
97
98	avio_skip(pb, 4);
99
100	ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
101	ast->codec->codec_id = AV_CODEC_ID_PCM_U8;
102	ast->codec->codec_tag = 0; /* no fourcc */
103	ast->codec->sample_rate = avio_rl16(pb);
104	ast->codec->channels = 1;
105	ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
106	avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
107
108	avio_skip(pb, 10);
109
110	ast->index_entries = av_malloc(ast->nb_index_entries *
111	sizeof(*ast->index_entries));
112	if (!ast->index_entries)
113	return AVERROR(ENOMEM);
114
115	jv->frames = av_malloc(ast->nb_index_entries * sizeof(JVFrame));
116	if (!jv->frames)
117	return AVERROR(ENOMEM);
118
119	offset = 0x68 + ast->nb_index_entries * 16;
120	for (i = 0; i < ast->nb_index_entries; i++) {
121	AVIndexEntry *e = ast->index_entries + i;
122	JVFrame *jvf = jv->frames + i;
123
124	/* total frame size including audio, video, palette data and padding */
125	e->size = avio_rl32(pb);
126	e->timestamp = i;
127	e->pos = offset;
128	offset += e->size;
129
130	jvf->audio_size = avio_rl32(pb);
131	jvf->video_size = avio_rl32(pb);
132	jvf->palette_size = avio_r8(pb) ? 768 : 0;
133
134	if ((jvf->video_size \| jvf->audio_size) & ~0xFFFFFF \|\|
135	e->size - jvf->audio_size
136	- jvf->video_size
137	- jvf->palette_size < 0) {
138	if (s->error_recognition & AV_EF_EXPLODE) {
139	read_close(s);
140	return AVERROR_INVALIDDATA;
141	}
142	jvf->audio_size =
143	jvf->video_size =
144	jvf->palette_size = 0;
145	}
146
147	if (avio_r8(pb))
148	av_log(s, AV_LOG_WARNING, "unsupported audio codec\n");
149
150	jvf->video_type = avio_r8(pb);
151	avio_skip(pb, 1);
152
153	e->timestamp = jvf->audio_size ? audio_pts : AV_NOPTS_VALUE;
154	audio_pts += jvf->audio_size;
155
156	e->flags = jvf->video_type != 1 ? AVINDEX_KEYFRAME : 0;
157	}
158
159	jv->state = JV_AUDIO;
160	return 0;
161	}
162
163	static int read_packet(AVFormatContext s, AVPacket pkt)
164	{
165	JVDemuxContext *jv = s->priv_data;
166	AVIOContext *pb = s->pb;
167	AVStream *ast = s->streams[0];
168
169	while (!avio_feof(s->pb) && jv->pts < ast->nb_index_entries) {
170	const AVIndexEntry *e = ast->index_entries + jv->pts;
171	const JVFrame *jvf = jv->frames + jv->pts;
172
173	switch (jv->state) {
174	case JV_AUDIO:
175	jv->state++;
176	if (jvf->audio_size) {
177	if (av_get_packet(s->pb, pkt, jvf->audio_size) < 0)
178	return AVERROR(ENOMEM);
179	pkt->stream_index = 0;
180	pkt->pts = e->timestamp;
181	pkt->flags \|= AV_PKT_FLAG_KEY;
182	return 0;
183	}
184	case JV_VIDEO:
185	jv->state++;
186	if (jvf->video_size \|\| jvf->palette_size) {
187	int ret;
188	int size = jvf->video_size + jvf->palette_size;
189	if (av_new_packet(pkt, size + JV_PREAMBLE_SIZE))
190	return AVERROR(ENOMEM);
191
192	AV_WL32(pkt->data, jvf->video_size);
193	pkt->data[4] = jvf->video_type;
194	ret = avio_read(pb, pkt->data + JV_PREAMBLE_SIZE, size);
195	if (ret < 0)
196	return ret;
197	if (ret < size) {
198	memset(pkt->data + JV_PREAMBLE_SIZE + ret, 0,
199	FF_INPUT_BUFFER_PADDING_SIZE);
200	pkt->flags \|= AV_PKT_FLAG_CORRUPT;
201	}
202	pkt->size = ret + JV_PREAMBLE_SIZE;
203	pkt->stream_index = 1;
204	pkt->pts = jv->pts;
205	if (jvf->video_type != 1)
206	pkt->flags \|= AV_PKT_FLAG_KEY;
207	return 0;
208	}
209	case JV_PADDING:
210	avio_skip(pb, FFMAX(e->size - jvf->audio_size - jvf->video_size
211	- jvf->palette_size, 0));
212	jv->state = JV_AUDIO;
213	jv->pts++;
214	}
215	}
216
217	if (s->pb->eof_reached)
218	return AVERROR_EOF;
219
220	return AVERROR(EIO);
221	}
222
223	static int read_seek(AVFormatContext *s, int stream_index,
224	int64_t ts, int flags)
225	{
226	JVDemuxContext *jv = s->priv_data;
227	AVStream *ast = s->streams[0];
228	int i;
229
230	if (flags & (AVSEEK_FLAG_BYTE \| AVSEEK_FLAG_FRAME))
231	return AVERROR(ENOSYS);
232
233	switch (stream_index) {
234	case 0:
235	i = av_index_search_timestamp(ast, ts, flags);
236	break;
237	case 1:
238	i = ts;
239	break;
240	default:
241	return 0;
242	}
243
244	if (i < 0 \|\| i >= ast->nb_index_entries)
245	return 0;
246	if (avio_seek(s->pb, ast->index_entries[i].pos, SEEK_SET) < 0)
247	return -1;
248
249	jv->state = JV_AUDIO;
250	jv->pts = i;
251	return 0;
252	}
253
254	AVInputFormat ff_jv_demuxer = {
255	.name = "jv",
256	.long_name = NULL_IF_CONFIG_SMALL("Bitmap Brothers JV"),
257	.priv_data_size = sizeof(JVDemuxContext),
258	.read_probe = read_probe,
259	.read_header = read_header,
260	.read_packet = read_packet,
261	.read_seek = read_seek,
262	.read_close = read_close,
263	};