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

/*
 * THP Demuxer
 * Copyright (c) 2007 Marco Gerards
 *
 * 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/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "avformat.h"
#include "internal.h"

typedef struct ThpDemuxContext {
    int              version;
    unsigned         first_frame;
    unsigned         first_framesz;
    unsigned         last_frame;
    int              compoff;
    unsigned         framecnt;
    AVRational       fps;
    unsigned         frame;
    int64_t          next_frame;
    unsigned         next_framesz;
    int              video_stream_index;
    int              audio_stream_index;
    int              compcount;
    unsigned char    components[16];
    AVStream*        vst;
    int              has_audio;
    unsigned         audiosize;
} ThpDemuxContext;


static int thp_probe(AVProbeData *p)
{
    double d;
    /* check file header */
    if (AV_RL32(p->buf) != MKTAG('T', 'H', 'P', '\0'))
        return 0;

    d = av_int2float(AV_RB32(p->buf + 16));
    if (d < 0.1 || d > 1000 || isnan(d))
        return AVPROBE_SCORE_MAX/4;

    return AVPROBE_SCORE_MAX;
}

static int thp_read_header(AVFormatContext *s)
{
    ThpDemuxContext *thp = s->priv_data;
    AVStream *st;
    AVIOContext *pb = s->pb;
    int64_t fsize= avio_size(pb);
    int i;

    /* Read the file header.  */
                           avio_rb32(pb); /* Skip Magic.  */
    thp->version         = avio_rb32(pb);

                           avio_rb32(pb); /* Max buf size.  */
                           avio_rb32(pb); /* Max samples.  */

    thp->fps             = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
    thp->framecnt        = avio_rb32(pb);
    thp->first_framesz   = avio_rb32(pb);
    pb->maxsize          = avio_rb32(pb);
    if(fsize>0 && (!pb->maxsize || fsize < pb->maxsize))
        pb->maxsize= fsize;

    thp->compoff         = avio_rb32(pb);
                           avio_rb32(pb); /* offsetDataOffset.  */
    thp->first_frame     = avio_rb32(pb);
    thp->last_frame      = avio_rb32(pb);

    thp->next_framesz    = thp->first_framesz;
    thp->next_frame      = thp->first_frame;

    /* Read the component structure.  */
    avio_seek (pb, thp->compoff, SEEK_SET);
    thp->compcount       = avio_rb32(pb);

    /* Read the list of component types.  */
    avio_read(pb, thp->components, 16);

    for (i = 0; i < thp->compcount; i++) {
        if (thp->components[i] == 0) {
            if (thp->vst)
                break;

            /* Video component.  */
            st = avformat_new_stream(s, NULL);
            if (!st)
                return AVERROR(ENOMEM);

            /* The denominator and numerator are switched because 1/fps
               is required.  */
            avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
            st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
            st->codec->codec_id = AV_CODEC_ID_THP;
            st->codec->codec_tag = 0;  /* no fourcc */
            st->codec->width = avio_rb32(pb);
            st->codec->height = avio_rb32(pb);
            st->nb_frames =
            st->duration = thp->framecnt;
            thp->vst = st;
            thp->video_stream_index = st->index;

            if (thp->version == 0x11000)
                avio_rb32(pb); /* Unknown.  */
        } else if (thp->components[i] == 1) {
            if (thp->has_audio != 0)
                break;

            /* Audio component.  */
            st = avformat_new_stream(s, NULL);
            if (!st)
                return AVERROR(ENOMEM);

            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
            st->codec->codec_id = AV_CODEC_ID_ADPCM_THP;
            st->codec->codec_tag = 0;  /* no fourcc */
            st->codec->channels    = avio_rb32(pb); /* numChannels.  */
            st->codec->sample_rate = avio_rb32(pb); /* Frequency.  */

            avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

            thp->audio_stream_index = st->index;
            thp->has_audio = 1;
        }
    }

    return 0;
}

static int thp_read_packet(AVFormatContext *s,
                            AVPacket *pkt)
{
    ThpDemuxContext *thp = s->priv_data;
    AVIOContext *pb = s->pb;
    unsigned int size;
    int ret;

    if (thp->audiosize == 0) {
        /* Terminate when last frame is reached.  */
        if (thp->frame >= thp->framecnt)
            return AVERROR_EOF;

        avio_seek(pb, thp->next_frame, SEEK_SET);

        /* Locate the next frame and read out its size.  */
        thp->next_frame += FFMAX(thp->next_framesz, 1);
        thp->next_framesz = avio_rb32(pb);

                        avio_rb32(pb); /* Previous total size.  */
        size          = avio_rb32(pb); /* Total size of this frame.  */

        /* Store the audiosize so the next time this function is called,
           the audio can be read.  */
        if (thp->has_audio)
            thp->audiosize = avio_rb32(pb); /* Audio size.  */
        else
            thp->frame++;

        ret = av_get_packet(pb, pkt, size);
        if (ret != size) {
            av_free_packet(pkt);
            return AVERROR(EIO);
        }

        pkt->stream_index = thp->video_stream_index;
    } else {
        ret = av_get_packet(pb, pkt, thp->audiosize);
        if (ret != thp->audiosize) {
            av_free_packet(pkt);
            return AVERROR(EIO);
        }

        pkt->stream_index = thp->audio_stream_index;
        if (thp->audiosize >= 8)
            pkt->duration = AV_RB32(&pkt->data[4]);

        thp->audiosize = 0;
        thp->frame++;
    }

    return 0;
}

AVInputFormat ff_thp_demuxer = {
    .name           = "thp",
    .long_name      = NULL_IF_CONFIG_SMALL("THP"),
    .priv_data_size = sizeof(ThpDemuxContext),
    .read_probe     = thp_probe,
    .read_header    = thp_read_header,
    .read_packet    = thp_read_packet
};
Commit	Line	Data
	1	/*
	2	* THP Demuxer
	3	* Copyright (c) 2007 Marco Gerards
	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/intreadwrite.h"
	23	#include "libavutil/intfloat.h"
	24	#include "avformat.h"
	25	#include "internal.h"
	26
	27	typedef struct ThpDemuxContext {
	28	int version;
	29	unsigned first_frame;
	30	unsigned first_framesz;
	31	unsigned last_frame;
	32	int compoff;
	33	unsigned framecnt;
	34	AVRational fps;
	35	unsigned frame;
	36	int64_t next_frame;
	37	unsigned next_framesz;
	38	int video_stream_index;
	39	int audio_stream_index;
	40	int compcount;
	41	unsigned char components[16];
	42	AVStream* vst;
	43	int has_audio;
	44	unsigned audiosize;
	45	} ThpDemuxContext;
	46
	47
	48	static int thp_probe(AVProbeData *p)
	49	{
	50	double d;
	51	/* check file header */
	52	if (AV_RL32(p->buf) != MKTAG('T', 'H', 'P', '\0'))
	53	return 0;
	54
	55	d = av_int2float(AV_RB32(p->buf + 16));
	56	if (d < 0.1 \|\| d > 1000 \|\| isnan(d))
	57	return AVPROBE_SCORE_MAX/4;
	58
	59	return AVPROBE_SCORE_MAX;
	60	}
	61
	62	static int thp_read_header(AVFormatContext *s)
	63	{
	64	ThpDemuxContext *thp = s->priv_data;
	65	AVStream *st;
	66	AVIOContext *pb = s->pb;
	67	int64_t fsize= avio_size(pb);
	68	int i;
	69
	70	/* Read the file header. */
	71	avio_rb32(pb); /* Skip Magic. */
	72	thp->version = avio_rb32(pb);
	73
	74	avio_rb32(pb); /* Max buf size. */
	75	avio_rb32(pb); /* Max samples. */
	76
	77	thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
	78	thp->framecnt = avio_rb32(pb);
	79	thp->first_framesz = avio_rb32(pb);
	80	pb->maxsize = avio_rb32(pb);
	81	if(fsize>0 && (!pb->maxsize \|\| fsize < pb->maxsize))
	82	pb->maxsize= fsize;
	83
	84	thp->compoff = avio_rb32(pb);
	85	avio_rb32(pb); /* offsetDataOffset. */
	86	thp->first_frame = avio_rb32(pb);
	87	thp->last_frame = avio_rb32(pb);
	88
	89	thp->next_framesz = thp->first_framesz;
	90	thp->next_frame = thp->first_frame;
	91
	92	/* Read the component structure. */
	93	avio_seek (pb, thp->compoff, SEEK_SET);
	94	thp->compcount = avio_rb32(pb);
	95
	96	/* Read the list of component types. */
	97	avio_read(pb, thp->components, 16);
	98
	99	for (i = 0; i < thp->compcount; i++) {
	100	if (thp->components[i] == 0) {
	101	if (thp->vst)
	102	break;
	103
	104	/* Video component. */
	105	st = avformat_new_stream(s, NULL);
	106	if (!st)
	107	return AVERROR(ENOMEM);
	108
	109	/* The denominator and numerator are switched because 1/fps
	110	is required. */
	111	avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
	112	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
	113	st->codec->codec_id = AV_CODEC_ID_THP;
	114	st->codec->codec_tag = 0; /* no fourcc */
	115	st->codec->width = avio_rb32(pb);
	116	st->codec->height = avio_rb32(pb);
	117	st->nb_frames =
	118	st->duration = thp->framecnt;
	119	thp->vst = st;
	120	thp->video_stream_index = st->index;
	121
	122	if (thp->version == 0x11000)
	123	avio_rb32(pb); /* Unknown. */
	124	} else if (thp->components[i] == 1) {
	125	if (thp->has_audio != 0)
	126	break;
	127
	128	/* Audio component. */
	129	st = avformat_new_stream(s, NULL);
	130	if (!st)
	131	return AVERROR(ENOMEM);
	132
	133	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
	134	st->codec->codec_id = AV_CODEC_ID_ADPCM_THP;
	135	st->codec->codec_tag = 0; /* no fourcc */
	136	st->codec->channels = avio_rb32(pb); /* numChannels. */
	137	st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
	138
	139	avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
	140
	141	thp->audio_stream_index = st->index;
	142	thp->has_audio = 1;
	143	}
	144	}
	145
	146	return 0;
	147	}
	148
	149	static int thp_read_packet(AVFormatContext *s,
	150	AVPacket *pkt)
	151	{
	152	ThpDemuxContext *thp = s->priv_data;
	153	AVIOContext *pb = s->pb;
	154	unsigned int size;
	155	int ret;
	156
	157	if (thp->audiosize == 0) {
	158	/* Terminate when last frame is reached. */
	159	if (thp->frame >= thp->framecnt)
	160	return AVERROR_EOF;
	161
	162	avio_seek(pb, thp->next_frame, SEEK_SET);
	163
	164	/* Locate the next frame and read out its size. */
	165	thp->next_frame += FFMAX(thp->next_framesz, 1);
	166	thp->next_framesz = avio_rb32(pb);
	167
	168	avio_rb32(pb); /* Previous total size. */
	169	size = avio_rb32(pb); /* Total size of this frame. */
	170
	171	/* Store the audiosize so the next time this function is called,
	172	the audio can be read. */
	173	if (thp->has_audio)
	174	thp->audiosize = avio_rb32(pb); /* Audio size. */
	175	else
	176	thp->frame++;
	177
	178	ret = av_get_packet(pb, pkt, size);
	179	if (ret != size) {
	180	av_free_packet(pkt);
	181	return AVERROR(EIO);
	182	}
	183
	184	pkt->stream_index = thp->video_stream_index;
	185	} else {
	186	ret = av_get_packet(pb, pkt, thp->audiosize);
	187	if (ret != thp->audiosize) {
	188	av_free_packet(pkt);
	189	return AVERROR(EIO);
	190	}
	191
	192	pkt->stream_index = thp->audio_stream_index;
	193	if (thp->audiosize >= 8)
	194	pkt->duration = AV_RB32(&pkt->data[4]);
	195
	196	thp->audiosize = 0;
	197	thp->frame++;
	198	}
	199
	200	return 0;
	201	}
	202
	203	AVInputFormat ff_thp_demuxer = {
	204	.name = "thp",
	205	.long_name = NULL_IF_CONFIG_SMALL("THP"),
	206	.priv_data_size = sizeof(ThpDemuxContext),
	207	.read_probe = thp_probe,
	208	.read_header = thp_read_header,
	209	.read_packet = thp_read_packet
	210	};