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

/*
 * RAW demuxers
 * Copyright (c) 2001 Fabrice Bellard
 * Copyright (c) 2005 Alex Beregszaszi
 *
 * 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 "avformat.h"
#include "internal.h"
#include "avio_internal.h"
#include "rawdec.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"

#define RAW_PACKET_SIZE 1024

int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
{
    int ret, size;

    size = RAW_PACKET_SIZE;

    if (av_new_packet(pkt, size) < 0)
        return AVERROR(ENOMEM);

    pkt->pos= avio_tell(s->pb);
    pkt->stream_index = 0;
    ret = ffio_read_partial(s->pb, pkt->data, size);
    if (ret < 0) {
        av_free_packet(pkt);
        return ret;
    }
    av_shrink_packet(pkt, ret);
    return ret;
}

int ff_raw_audio_read_header(AVFormatContext *s)
{
    AVStream *st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = s->iformat->raw_codec_id;
    st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
    st->start_time = 0;
    /* the parameters will be extracted from the compressed bitstream */

    return 0;
}

/* MPEG-1/H.263 input */
int ff_raw_video_read_header(AVFormatContext *s)
{
    AVStream *st;
    FFRawVideoDemuxerContext *s1 = s->priv_data;
    int ret = 0;


    st = avformat_new_stream(s, NULL);
    if (!st) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = s->iformat->raw_codec_id;
    st->need_parsing = AVSTREAM_PARSE_FULL_RAW;

    st->codec->time_base = av_inv_q(s1->framerate);
    avpriv_set_pts_info(st, 64, 1, 1200000);

fail:
    return ret;
}

static int ff_raw_data_read_header(AVFormatContext *s)
{
    AVStream *st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
    st->codec->codec_id = s->iformat->raw_codec_id;
    st->start_time = 0;
    return 0;
}

/* Note: Do not forget to add new entries to the Makefile as well. */

#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
const AVOption ff_rawvideo_options[] = {
    { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC},
    { NULL },
};

#if CONFIG_DATA_DEMUXER
AVInputFormat ff_data_demuxer = {
    .name           = "data",
    .long_name      = NULL_IF_CONFIG_SMALL("raw data"),
    .read_header    = ff_raw_data_read_header,
    .read_packet    = ff_raw_read_partial_packet,
    .raw_codec_id   = AV_CODEC_ID_NONE,
};
#endif

#if CONFIG_LATM_DEMUXER

AVInputFormat ff_latm_demuxer = {
    .name           = "latm",
    .long_name      = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
    .read_header    = ff_raw_audio_read_header,
    .read_packet    = ff_raw_read_partial_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "latm",
    .raw_codec_id   = AV_CODEC_ID_AAC_LATM,
};
#endif

#if CONFIG_MJPEG_DEMUXER
static int mjpeg_probe(AVProbeData *p)
{
    int i;
    int state = -1;
    int nb_invalid = 0;
    int nb_frames = 0;

    for (i=0; i<p->buf_size-2; i++) {
        int c;
        if (p->buf[i] != 0xFF)
            continue;
        c = p->buf[i+1];
        switch (c) {
        case 0xD8:
            state = 0xD8;
            break;
        case 0xC0:
        case 0xC1:
        case 0xC2:
        case 0xC3:
        case 0xC5:
        case 0xC6:
        case 0xC7:
        case 0xF7:
            if (state == 0xD8) {
                state = 0xC0;
            } else
                nb_invalid++;
            break;
        case 0xDA:
            if (state == 0xC0) {
                state = 0xDA;
            } else
                nb_invalid++;
            break;
        case 0xD9:
            if (state == 0xDA) {
                state = 0xD9;
                nb_frames++;
            } else
                nb_invalid++;
            break;
        default:
            if (  (c >= 0x02 && c <= 0xBF)
                || c == 0xC8) {
                nb_invalid++;
            }
        }
    }

    if (nb_invalid*4 + 1 < nb_frames) {
        static const char ct_jpeg[] = "\r\nContent-Type: image/jpeg\r\n\r\n";
        int i;

        for (i=0; i<FFMIN(p->buf_size - sizeof(ct_jpeg), 100); i++)
            if (!memcmp(p->buf + i, ct_jpeg, sizeof(ct_jpeg) - 1))
                return AVPROBE_SCORE_EXTENSION;

        if (nb_invalid == 0 && nb_frames > 2)
            return AVPROBE_SCORE_EXTENSION / 2;
        return AVPROBE_SCORE_EXTENSION / 4;
    }

    return 0;
}

FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
#endif

#if CONFIG_MLP_DEMUXER
AVInputFormat ff_mlp_demuxer = {
    .name           = "mlp",
    .long_name      = NULL_IF_CONFIG_SMALL("raw MLP"),
    .read_header    = ff_raw_audio_read_header,
    .read_packet    = ff_raw_read_partial_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "mlp",
    .raw_codec_id   = AV_CODEC_ID_MLP,
};
#endif

#if CONFIG_TRUEHD_DEMUXER
AVInputFormat ff_truehd_demuxer = {
    .name           = "truehd",
    .long_name      = NULL_IF_CONFIG_SMALL("raw TrueHD"),
    .read_header    = ff_raw_audio_read_header,
    .read_packet    = ff_raw_read_partial_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "thd",
    .raw_codec_id   = AV_CODEC_ID_TRUEHD,
};
#endif

#if CONFIG_SHORTEN_DEMUXER
AVInputFormat ff_shorten_demuxer = {
    .name           = "shn",
    .long_name      = NULL_IF_CONFIG_SMALL("raw Shorten"),
    .read_header    = ff_raw_audio_read_header,
    .read_packet    = ff_raw_read_partial_packet,
    .flags          = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,
    .extensions     = "shn",
    .raw_codec_id   = AV_CODEC_ID_SHORTEN,
};
#endif

#if CONFIG_VC1_DEMUXER
FF_DEF_RAWVIDEO_DEMUXER2(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
#endif
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* RAW demuxers
	3	* Copyright (c) 2001 Fabrice Bellard
	4	* Copyright (c) 2005 Alex Beregszaszi
	5	*
	6	* This file is part of FFmpeg.
	7	*
	8	* FFmpeg is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2.1 of the License, or (at your option) any later version.
	12	*
	13	* FFmpeg is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with FFmpeg; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	#include "avformat.h"
	24	#include "internal.h"
	25	#include "avio_internal.h"
	26	#include "rawdec.h"
	27	#include "libavutil/opt.h"
	28	#include "libavutil/parseutils.h"
	29	#include "libavutil/pixdesc.h"
	30	#include "libavutil/avassert.h"
	31	#include "libavutil/intreadwrite.h"
	32
	33	#define RAW_PACKET_SIZE 1024
	34
	35	int ff_raw_read_partial_packet(AVFormatContext s, AVPacket pkt)
	36	{
	37	int ret, size;
	38
	39	size = RAW_PACKET_SIZE;
	40
	41	if (av_new_packet(pkt, size) < 0)
	42	return AVERROR(ENOMEM);
	43
	44	pkt->pos= avio_tell(s->pb);
	45	pkt->stream_index = 0;
	46	ret = ffio_read_partial(s->pb, pkt->data, size);
	47	if (ret < 0) {
	48	av_free_packet(pkt);
	49	return ret;
	50	}
	51	av_shrink_packet(pkt, ret);
	52	return ret;
	53	}
	54
	55	int ff_raw_audio_read_header(AVFormatContext *s)
	56	{
	57	AVStream *st = avformat_new_stream(s, NULL);
	58	if (!st)
	59	return AVERROR(ENOMEM);
	60	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
	61	st->codec->codec_id = s->iformat->raw_codec_id;
	62	st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
	63	st->start_time = 0;
	64	/* the parameters will be extracted from the compressed bitstream */
65
66	return 0;
67	}
68
69	/* MPEG-1/H.263 input */
70	int ff_raw_video_read_header(AVFormatContext *s)
71	{
72	AVStream *st;
73	FFRawVideoDemuxerContext *s1 = s->priv_data;
74	int ret = 0;
75
76
77	st = avformat_new_stream(s, NULL);
78	if (!st) {
79	ret = AVERROR(ENOMEM);
80	goto fail;
81	}
82
83	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
84	st->codec->codec_id = s->iformat->raw_codec_id;
85	st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
86
87	st->codec->time_base = av_inv_q(s1->framerate);
88	avpriv_set_pts_info(st, 64, 1, 1200000);
89
90	fail:
91	return ret;
92	}
93
94	static int ff_raw_data_read_header(AVFormatContext *s)
95	{
96	AVStream *st = avformat_new_stream(s, NULL);
97	if (!st)
98	return AVERROR(ENOMEM);
99	st->codec->codec_type = AVMEDIA_TYPE_DATA;
100	st->codec->codec_id = s->iformat->raw_codec_id;
101	st->start_time = 0;
102	return 0;
103	}
104
105	/* Note: Do not forget to add new entries to the Makefile as well. */
106
107	#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
108	#define DEC AV_OPT_FLAG_DECODING_PARAM
109	const AVOption ff_rawvideo_options[] = {
110	{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC},
111	{ NULL },
112	};
113
114	#if CONFIG_DATA_DEMUXER
115	AVInputFormat ff_data_demuxer = {
116	.name = "data",
117	.long_name = NULL_IF_CONFIG_SMALL("raw data"),
118	.read_header = ff_raw_data_read_header,
119	.read_packet = ff_raw_read_partial_packet,
120	.raw_codec_id = AV_CODEC_ID_NONE,
121	};
122	#endif
123
124	#if CONFIG_LATM_DEMUXER
125
126	AVInputFormat ff_latm_demuxer = {
127	.name = "latm",
128	.long_name = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
129	.read_header = ff_raw_audio_read_header,
130	.read_packet = ff_raw_read_partial_packet,
131	.flags = AVFMT_GENERIC_INDEX,
132	.extensions = "latm",
133	.raw_codec_id = AV_CODEC_ID_AAC_LATM,
134	};
135	#endif
136
137	#if CONFIG_MJPEG_DEMUXER
138	static int mjpeg_probe(AVProbeData *p)
139	{
140	int i;
141	int state = -1;
142	int nb_invalid = 0;
143	int nb_frames = 0;
144
145	for (i=0; i<p->buf_size-2; i++) {
146	int c;
147	if (p->buf[i] != 0xFF)
148	continue;
149	c = p->buf[i+1];
150	switch (c) {
151	case 0xD8:
152	state = 0xD8;
153	break;
154	case 0xC0:
155	case 0xC1:
156	case 0xC2:
157	case 0xC3:
158	case 0xC5:
159	case 0xC6:
160	case 0xC7:
161	case 0xF7:
162	if (state == 0xD8) {
163	state = 0xC0;
164	} else
165	nb_invalid++;
166	break;
167	case 0xDA:
168	if (state == 0xC0) {
169	state = 0xDA;
170	} else
171	nb_invalid++;
172	break;
173	case 0xD9:
174	if (state == 0xDA) {
175	state = 0xD9;
176	nb_frames++;
177	} else
178	nb_invalid++;
179	break;
180	default:
181	if ( (c >= 0x02 && c <= 0xBF)
182	\|\| c == 0xC8) {
183	nb_invalid++;
184	}
185	}
186	}
187
188	if (nb_invalid*4 + 1 < nb_frames) {
189	static const char ct_jpeg[] = "\r\nContent-Type: image/jpeg\r\n\r\n";
190	int i;
191
192	for (i=0; i<FFMIN(p->buf_size - sizeof(ct_jpeg), 100); i++)
193	if (!memcmp(p->buf + i, ct_jpeg, sizeof(ct_jpeg) - 1))
194	return AVPROBE_SCORE_EXTENSION;
195
196	if (nb_invalid == 0 && nb_frames > 2)
197	return AVPROBE_SCORE_EXTENSION / 2;
198	return AVPROBE_SCORE_EXTENSION / 4;
199	}
200
201	return 0;
202	}
203
204	FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX\|AVFMT_NOTIMESTAMPS)
205	#endif
206
207	#if CONFIG_MLP_DEMUXER
208	AVInputFormat ff_mlp_demuxer = {
209	.name = "mlp",
210	.long_name = NULL_IF_CONFIG_SMALL("raw MLP"),
211	.read_header = ff_raw_audio_read_header,
212	.read_packet = ff_raw_read_partial_packet,
213	.flags = AVFMT_GENERIC_INDEX,
214	.extensions = "mlp",
215	.raw_codec_id = AV_CODEC_ID_MLP,
216	};
217	#endif
218
219	#if CONFIG_TRUEHD_DEMUXER
220	AVInputFormat ff_truehd_demuxer = {
221	.name = "truehd",
222	.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"),
223	.read_header = ff_raw_audio_read_header,
224	.read_packet = ff_raw_read_partial_packet,
225	.flags = AVFMT_GENERIC_INDEX,
226	.extensions = "thd",
227	.raw_codec_id = AV_CODEC_ID_TRUEHD,
228	};
229	#endif
230
231	#if CONFIG_SHORTEN_DEMUXER
232	AVInputFormat ff_shorten_demuxer = {
233	.name = "shn",
234	.long_name = NULL_IF_CONFIG_SMALL("raw Shorten"),
235	.read_header = ff_raw_audio_read_header,
236	.read_packet = ff_raw_read_partial_packet,
237	.flags = AVFMT_NOBINSEARCH \| AVFMT_NOGENSEARCH \| AVFMT_NO_BYTE_SEEK,
238	.extensions = "shn",
239	.raw_codec_id = AV_CODEC_ID_SHORTEN,
240	};
241	#endif
242
243	#if CONFIG_VC1_DEMUXER
244	FF_DEF_RAWVIDEO_DEMUXER2(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1, AVFMT_GENERIC_INDEX\|AVFMT_NOTIMESTAMPS)
245	#endif