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

/*
 * id RoQ (.roq) File Demuxer
 * Copyright (c) 2003 The FFmpeg Project
 *
 * 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
 * id RoQ format file demuxer
 * by Mike Melanson (melanson@pcisys.net)
 * for more information on the .roq file format, visit:
 *   http://www.csse.monash.edu.au/~timf/
 */

#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
#include "avio_internal.h"

#define RoQ_MAGIC_NUMBER 0x1084
#define RoQ_CHUNK_PREAMBLE_SIZE 8
#define RoQ_AUDIO_SAMPLE_RATE 22050
#define RoQ_CHUNKS_TO_SCAN 30

#define RoQ_INFO           0x1001
#define RoQ_QUAD_CODEBOOK  0x1002
#define RoQ_QUAD_VQ        0x1011
#define RoQ_SOUND_MONO     0x1020
#define RoQ_SOUND_STEREO   0x1021

typedef struct RoqDemuxContext {

    int frame_rate;
    int width;
    int height;
    int audio_channels;

    int video_stream_index;
    int audio_stream_index;

    int64_t video_pts;
    unsigned int audio_frame_count;

} RoqDemuxContext;

static int roq_probe(AVProbeData *p)
{
    if ((AV_RL16(&p->buf[0]) != RoQ_MAGIC_NUMBER) ||
        (AV_RL32(&p->buf[2]) != 0xFFFFFFFF))
        return 0;

    return AVPROBE_SCORE_MAX;
}

static int roq_read_header(AVFormatContext *s)
{
    RoqDemuxContext *roq = s->priv_data;
    AVIOContext *pb = s->pb;
    unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];

    /* get the main header */
    if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
        RoQ_CHUNK_PREAMBLE_SIZE)
        return AVERROR(EIO);
    roq->frame_rate = AV_RL16(&preamble[6]);

    /* init private context parameters */
    roq->width = roq->height = roq->audio_channels = roq->video_pts =
    roq->audio_frame_count = 0;
    roq->audio_stream_index = -1;
    roq->video_stream_index = -1;

    s->ctx_flags |= AVFMTCTX_NOHEADER;

    return 0;
}

static int roq_read_packet(AVFormatContext *s,
                           AVPacket *pkt)
{
    RoqDemuxContext *roq = s->priv_data;
    AVIOContext *pb = s->pb;
    int ret = 0;
    unsigned int chunk_size;
    unsigned int chunk_type;
    unsigned int codebook_size;
    unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
    int packet_read = 0;
    int64_t codebook_offset;

    while (!packet_read) {

        if (avio_feof(s->pb))
            return AVERROR(EIO);

        /* get the next chunk preamble */
        if ((ret = avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) !=
            RoQ_CHUNK_PREAMBLE_SIZE)
            return AVERROR(EIO);

        chunk_type = AV_RL16(&preamble[0]);
        chunk_size = AV_RL32(&preamble[2]);
        if(chunk_size > INT_MAX)
            return AVERROR_INVALIDDATA;

        chunk_size = ffio_limit(pb, chunk_size);

        switch (chunk_type) {

        case RoQ_INFO:
            if (roq->video_stream_index == -1) {
                AVStream *st = avformat_new_stream(s, NULL);
                if (!st)
                    return AVERROR(ENOMEM);
                avpriv_set_pts_info(st, 63, 1, roq->frame_rate);
                roq->video_stream_index = st->index;
                st->codec->codec_type   = AVMEDIA_TYPE_VIDEO;
                st->codec->codec_id     = AV_CODEC_ID_ROQ;
                st->codec->codec_tag    = 0;  /* no fourcc */

                if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != RoQ_CHUNK_PREAMBLE_SIZE)
                    return AVERROR(EIO);
                st->codec->width  = roq->width  = AV_RL16(preamble);
                st->codec->height = roq->height = AV_RL16(preamble + 2);
                break;
            }
            /* don't care about this chunk anymore */
            avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
            break;

        case RoQ_QUAD_CODEBOOK:
            if (roq->video_stream_index < 0)
                return AVERROR_INVALIDDATA;
            /* packet needs to contain both this codebook and next VQ chunk */
            codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
            codebook_size = chunk_size;
            avio_skip(pb, codebook_size);
            if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
                RoQ_CHUNK_PREAMBLE_SIZE)
                return AVERROR(EIO);
            chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 +
                codebook_size;

            /* rewind */
            avio_seek(pb, codebook_offset, SEEK_SET);

            /* load up the packet */
            ret= av_get_packet(pb, pkt, chunk_size);
            if (ret != chunk_size)
                return AVERROR(EIO);
            pkt->stream_index = roq->video_stream_index;
            pkt->pts = roq->video_pts++;

            packet_read = 1;
            break;

        case RoQ_SOUND_MONO:
        case RoQ_SOUND_STEREO:
            if (roq->audio_stream_index == -1) {
                AVStream *st = avformat_new_stream(s, NULL);
                if (!st)
                    return AVERROR(ENOMEM);
                avpriv_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE);
                roq->audio_stream_index = st->index;
                st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
                st->codec->codec_id = AV_CODEC_ID_ROQ_DPCM;
                st->codec->codec_tag = 0;  /* no tag */
                if (chunk_type == RoQ_SOUND_STEREO) {
                    st->codec->channels       = 2;
                    st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
                } else {
                    st->codec->channels       = 1;
                    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
                }
                roq->audio_channels    = st->codec->channels;
                st->codec->sample_rate = RoQ_AUDIO_SAMPLE_RATE;
                st->codec->bits_per_coded_sample = 16;
                st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
                    st->codec->bits_per_coded_sample;
                st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
            }
        case RoQ_QUAD_VQ:
            if (chunk_type == RoQ_QUAD_VQ) {
                if (roq->video_stream_index < 0)
                    return AVERROR_INVALIDDATA;
            }

            /* load up the packet */
            if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
                return AVERROR(EIO);
            /* copy over preamble */
            memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);

            if (chunk_type == RoQ_QUAD_VQ) {
                pkt->stream_index = roq->video_stream_index;
                pkt->pts = roq->video_pts++;
            } else {
                pkt->stream_index = roq->audio_stream_index;
                pkt->pts = roq->audio_frame_count;
                roq->audio_frame_count += (chunk_size / roq->audio_channels);
            }

            pkt->pos= avio_tell(pb);
            ret = avio_read(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE,
                chunk_size);
            if (ret != chunk_size)
                ret = AVERROR(EIO);

            packet_read = 1;
            break;

        default:
            av_log(s, AV_LOG_ERROR, "  unknown RoQ chunk (%04X)\n", chunk_type);
            return AVERROR_INVALIDDATA;
        }
    }

    return ret;
}

AVInputFormat ff_roq_demuxer = {
    .name           = "roq",
    .long_name      = NULL_IF_CONFIG_SMALL("id RoQ"),
    .priv_data_size = sizeof(RoqDemuxContext),
    .read_probe     = roq_probe,
    .read_header    = roq_read_header,
    .read_packet    = roq_read_packet,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* id RoQ (.roq) File Demuxer
	3	* Copyright (c) 2003 The FFmpeg Project
	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	* id RoQ format file demuxer
	25	* by Mike Melanson (melanson@pcisys.net)
	26	* for more information on the .roq file format, visit:
	27	* http://www.csse.monash.edu.au/~timf/
	28	*/
	29
	30	#include "libavutil/channel_layout.h"
	31	#include "libavutil/intreadwrite.h"
	32	#include "avformat.h"
	33	#include "internal.h"
	34	#include "avio_internal.h"
	35
	36	#define RoQ_MAGIC_NUMBER 0x1084
	37	#define RoQ_CHUNK_PREAMBLE_SIZE 8
	38	#define RoQ_AUDIO_SAMPLE_RATE 22050
	39	#define RoQ_CHUNKS_TO_SCAN 30
	40
	41	#define RoQ_INFO 0x1001
	42	#define RoQ_QUAD_CODEBOOK 0x1002
	43	#define RoQ_QUAD_VQ 0x1011
	44	#define RoQ_SOUND_MONO 0x1020
	45	#define RoQ_SOUND_STEREO 0x1021
	46
	47	typedef struct RoqDemuxContext {
	48
	49	int frame_rate;
	50	int width;
	51	int height;
	52	int audio_channels;
	53
	54	int video_stream_index;
	55	int audio_stream_index;
	56
	57	int64_t video_pts;
	58	unsigned int audio_frame_count;
	59
	60	} RoqDemuxContext;
	61
	62	static int roq_probe(AVProbeData *p)
	63	{
	64	if ((AV_RL16(&p->buf[0]) != RoQ_MAGIC_NUMBER) \|\|
65	(AV_RL32(&p->buf[2]) != 0xFFFFFFFF))
66	return 0;
67
68	return AVPROBE_SCORE_MAX;
69	}
70
71	static int roq_read_header(AVFormatContext *s)
72	{
73	RoqDemuxContext *roq = s->priv_data;
74	AVIOContext *pb = s->pb;
75	unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
76
77	/* get the main header */
78	if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
79	RoQ_CHUNK_PREAMBLE_SIZE)
80	return AVERROR(EIO);
81	roq->frame_rate = AV_RL16(&preamble[6]);
82
83	/* init private context parameters */
84	roq->width = roq->height = roq->audio_channels = roq->video_pts =
85	roq->audio_frame_count = 0;
86	roq->audio_stream_index = -1;
87	roq->video_stream_index = -1;
88
89	s->ctx_flags \|= AVFMTCTX_NOHEADER;
90
91	return 0;
92	}
93
94	static int roq_read_packet(AVFormatContext *s,
95	AVPacket *pkt)
96	{
97	RoqDemuxContext *roq = s->priv_data;
98	AVIOContext *pb = s->pb;
99	int ret = 0;
100	unsigned int chunk_size;
101	unsigned int chunk_type;
102	unsigned int codebook_size;
103	unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
104	int packet_read = 0;
105	int64_t codebook_offset;
106
107	while (!packet_read) {
108
109	if (avio_feof(s->pb))
110	return AVERROR(EIO);
111
112	/* get the next chunk preamble */
113	if ((ret = avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) !=
114	RoQ_CHUNK_PREAMBLE_SIZE)
115	return AVERROR(EIO);
116
117	chunk_type = AV_RL16(&preamble[0]);
118	chunk_size = AV_RL32(&preamble[2]);
119	if(chunk_size > INT_MAX)
120	return AVERROR_INVALIDDATA;
121
122	chunk_size = ffio_limit(pb, chunk_size);
123
124	switch (chunk_type) {
125
126	case RoQ_INFO:
127	if (roq->video_stream_index == -1) {
128	AVStream *st = avformat_new_stream(s, NULL);
129	if (!st)
130	return AVERROR(ENOMEM);
131	avpriv_set_pts_info(st, 63, 1, roq->frame_rate);
132	roq->video_stream_index = st->index;
133	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
134	st->codec->codec_id = AV_CODEC_ID_ROQ;
135	st->codec->codec_tag = 0; /* no fourcc */
136
137	if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != RoQ_CHUNK_PREAMBLE_SIZE)
138	return AVERROR(EIO);
139	st->codec->width = roq->width = AV_RL16(preamble);
140	st->codec->height = roq->height = AV_RL16(preamble + 2);
141	break;
142	}
143	/* don't care about this chunk anymore */
144	avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
145	break;
146
147	case RoQ_QUAD_CODEBOOK:
148	if (roq->video_stream_index < 0)
149	return AVERROR_INVALIDDATA;
150	/* packet needs to contain both this codebook and next VQ chunk */
151	codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
152	codebook_size = chunk_size;
153	avio_skip(pb, codebook_size);
154	if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
155	RoQ_CHUNK_PREAMBLE_SIZE)
156	return AVERROR(EIO);
157	chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 +
158	codebook_size;
159
160	/* rewind */
161	avio_seek(pb, codebook_offset, SEEK_SET);
162
163	/* load up the packet */
164	ret= av_get_packet(pb, pkt, chunk_size);
165	if (ret != chunk_size)
166	return AVERROR(EIO);
167	pkt->stream_index = roq->video_stream_index;
168	pkt->pts = roq->video_pts++;
169
170	packet_read = 1;
171	break;
172
173	case RoQ_SOUND_MONO:
174	case RoQ_SOUND_STEREO:
175	if (roq->audio_stream_index == -1) {
176	AVStream *st = avformat_new_stream(s, NULL);
177	if (!st)
178	return AVERROR(ENOMEM);
179	avpriv_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE);
180	roq->audio_stream_index = st->index;
181	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
182	st->codec->codec_id = AV_CODEC_ID_ROQ_DPCM;
183	st->codec->codec_tag = 0; /* no tag */
184	if (chunk_type == RoQ_SOUND_STEREO) {
185	st->codec->channels = 2;
186	st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
187	} else {
188	st->codec->channels = 1;
189	st->codec->channel_layout = AV_CH_LAYOUT_MONO;
190	}
191	roq->audio_channels = st->codec->channels;
192	st->codec->sample_rate = RoQ_AUDIO_SAMPLE_RATE;
193	st->codec->bits_per_coded_sample = 16;
194	st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
195	st->codec->bits_per_coded_sample;
196	st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
197	}
198	case RoQ_QUAD_VQ:
199	if (chunk_type == RoQ_QUAD_VQ) {
200	if (roq->video_stream_index < 0)
201	return AVERROR_INVALIDDATA;
202	}
203
204	/* load up the packet */
205	if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
206	return AVERROR(EIO);
207	/* copy over preamble */
208	memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
209
210	if (chunk_type == RoQ_QUAD_VQ) {
211	pkt->stream_index = roq->video_stream_index;
212	pkt->pts = roq->video_pts++;
213	} else {
214	pkt->stream_index = roq->audio_stream_index;
215	pkt->pts = roq->audio_frame_count;
216	roq->audio_frame_count += (chunk_size / roq->audio_channels);
217	}
218
219	pkt->pos= avio_tell(pb);
220	ret = avio_read(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE,
221	chunk_size);
222	if (ret != chunk_size)
223	ret = AVERROR(EIO);
224
225	packet_read = 1;
226	break;
227
228	default:
229	av_log(s, AV_LOG_ERROR, " unknown RoQ chunk (%04X)\n", chunk_type);
230	return AVERROR_INVALIDDATA;
231	}
232	}
233
234	return ret;
235	}
236
237	AVInputFormat ff_roq_demuxer = {
238	.name = "roq",
239	.long_name = NULL_IF_CONFIG_SMALL("id RoQ"),
240	.priv_data_size = sizeof(RoqDemuxContext),
241	.read_probe = roq_probe,
242	.read_header = roq_read_header,
243	.read_packet = roq_read_packet,
244	};