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

/*
 * Delphine Software International CIN File Demuxer
 * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
 *
 * 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
 * Delphine Software International CIN file demuxer
 */

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


typedef struct CinFileHeader {
    int video_frame_size;
    int video_frame_width;
    int video_frame_height;
    int audio_frequency;
    int audio_bits;
    int audio_stereo;
    int audio_frame_size;
} CinFileHeader;

typedef struct CinFrameHeader {
    int audio_frame_type;
    int video_frame_type;
    int pal_colors_count;
    int audio_frame_size;
    int video_frame_size;
} CinFrameHeader;

typedef struct CinDemuxContext {
    int audio_stream_index;
    int video_stream_index;
    CinFileHeader file_header;
    int64_t audio_stream_pts;
    int64_t video_stream_pts;
    CinFrameHeader frame_header;
    int audio_buffer_size;
} CinDemuxContext;


static int cin_probe(AVProbeData *p)
{
    /* header starts with this special marker */
    if (AV_RL32(&p->buf[0]) != 0x55AA0000)
        return 0;

    /* for accuracy, check some header field values */
    if (AV_RL32(&p->buf[12]) != 22050 || p->buf[16] != 16 || p->buf[17] != 0)
        return 0;

    return AVPROBE_SCORE_MAX;
}

static int cin_read_file_header(CinDemuxContext *cin, AVIOContext *pb) {
    CinFileHeader *hdr = &cin->file_header;

    if (avio_rl32(pb) != 0x55AA0000)
        return AVERROR_INVALIDDATA;

    hdr->video_frame_size   = avio_rl32(pb);
    hdr->video_frame_width  = avio_rl16(pb);
    hdr->video_frame_height = avio_rl16(pb);
    hdr->audio_frequency    = avio_rl32(pb);
    hdr->audio_bits         = avio_r8(pb);
    hdr->audio_stereo       = avio_r8(pb);
    hdr->audio_frame_size   = avio_rl16(pb);

    if (hdr->audio_frequency != 22050 || hdr->audio_bits != 16 || hdr->audio_stereo != 0)
        return AVERROR_INVALIDDATA;

    return 0;
}

static int cin_read_header(AVFormatContext *s)
{
    int rc;
    CinDemuxContext *cin = s->priv_data;
    CinFileHeader *hdr = &cin->file_header;
    AVIOContext *pb = s->pb;
    AVStream *st;

    rc = cin_read_file_header(cin, pb);
    if (rc)
        return rc;

    cin->video_stream_pts = 0;
    cin->audio_stream_pts = 0;
    cin->audio_buffer_size = 0;

    /* initialize the video decoder stream */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    avpriv_set_pts_info(st, 32, 1, 12);
    cin->video_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = AV_CODEC_ID_DSICINVIDEO;
    st->codec->codec_tag = 0;  /* no fourcc */
    st->codec->width = hdr->video_frame_width;
    st->codec->height = hdr->video_frame_height;

    /* initialize the audio decoder stream */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    avpriv_set_pts_info(st, 32, 1, 22050);
    cin->audio_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = AV_CODEC_ID_DSICINAUDIO;
    st->codec->codec_tag = 0;  /* no tag */
    st->codec->channels = 1;
    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
    st->codec->sample_rate = 22050;
    st->codec->bits_per_coded_sample = 8;
    st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample * st->codec->channels;

    return 0;
}

static int cin_read_frame_header(CinDemuxContext *cin, AVIOContext *pb) {
    CinFrameHeader *hdr = &cin->frame_header;

    hdr->video_frame_type = avio_r8(pb);
    hdr->audio_frame_type = avio_r8(pb);
    hdr->pal_colors_count = avio_rl16(pb);
    hdr->video_frame_size = avio_rl32(pb);
    hdr->audio_frame_size = avio_rl32(pb);

    if (avio_feof(pb) || pb->error)
        return AVERROR(EIO);

    if (avio_rl32(pb) != 0xAA55AA55)
        return AVERROR_INVALIDDATA;
    if (hdr->video_frame_size < 0 || hdr->audio_frame_size < 0)
        return AVERROR_INVALIDDATA;

    return 0;
}

static int cin_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    CinDemuxContext *cin = s->priv_data;
    AVIOContext *pb = s->pb;
    CinFrameHeader *hdr = &cin->frame_header;
    int rc, palette_type, pkt_size;
    int ret;

    if (cin->audio_buffer_size == 0) {
        rc = cin_read_frame_header(cin, pb);
        if (rc)
            return rc;

        if ((int16_t)hdr->pal_colors_count < 0) {
            hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count;
            palette_type = 1;
        } else {
            palette_type = 0;
        }

        /* palette and video packet */
        pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size;

        pkt_size = ffio_limit(pb, pkt_size);

        ret = av_new_packet(pkt, 4 + pkt_size);
        if (ret < 0)
            return ret;

        pkt->stream_index = cin->video_stream_index;
        pkt->pts = cin->video_stream_pts++;

        pkt->data[0] = palette_type;
        pkt->data[1] = hdr->pal_colors_count & 0xFF;
        pkt->data[2] = hdr->pal_colors_count >> 8;
        pkt->data[3] = hdr->video_frame_type;

        ret = avio_read(pb, &pkt->data[4], pkt_size);
        if (ret < 0) {
            av_free_packet(pkt);
            return ret;
        }
        if (ret < pkt_size)
            av_shrink_packet(pkt, 4 + ret);

        /* sound buffer will be processed on next read_packet() call */
        cin->audio_buffer_size = hdr->audio_frame_size;
        return 0;
    }

    /* audio packet */
    ret = av_get_packet(pb, pkt, cin->audio_buffer_size);
    if (ret < 0)
        return ret;

    pkt->stream_index = cin->audio_stream_index;
    pkt->pts = cin->audio_stream_pts;
    pkt->duration = cin->audio_buffer_size - (pkt->pts == 0);
    cin->audio_stream_pts += pkt->duration;
    cin->audio_buffer_size = 0;
    return 0;
}

AVInputFormat ff_dsicin_demuxer = {
    .name           = "dsicin",
    .long_name      = NULL_IF_CONFIG_SMALL("Delphine Software International CIN"),
    .priv_data_size = sizeof(CinDemuxContext),
    .read_probe     = cin_probe,
    .read_header    = cin_read_header,
    .read_packet    = cin_read_packet,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Delphine Software International CIN File Demuxer
	3	* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
	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	* Delphine Software International CIN file demuxer
	25	*/
	26
	27	#include "libavutil/channel_layout.h"
	28	#include "libavutil/intreadwrite.h"
	29	#include "avformat.h"
	30	#include "internal.h"
	31	#include "avio_internal.h"
	32
	33
	34	typedef struct CinFileHeader {
	35	int video_frame_size;
	36	int video_frame_width;
	37	int video_frame_height;
	38	int audio_frequency;
	39	int audio_bits;
	40	int audio_stereo;
	41	int audio_frame_size;
	42	} CinFileHeader;
	43
	44	typedef struct CinFrameHeader {
	45	int audio_frame_type;
	46	int video_frame_type;
	47	int pal_colors_count;
	48	int audio_frame_size;
	49	int video_frame_size;
	50	} CinFrameHeader;
	51
	52	typedef struct CinDemuxContext {
	53	int audio_stream_index;
	54	int video_stream_index;
	55	CinFileHeader file_header;
	56	int64_t audio_stream_pts;
	57	int64_t video_stream_pts;
	58	CinFrameHeader frame_header;
	59	int audio_buffer_size;
	60	} CinDemuxContext;
	61
	62
	63	static int cin_probe(AVProbeData *p)
	64	{
65	/* header starts with this special marker */
66	if (AV_RL32(&p->buf[0]) != 0x55AA0000)
67	return 0;
68
69	/* for accuracy, check some header field values */
70	if (AV_RL32(&p->buf[12]) != 22050 \|\| p->buf[16] != 16 \|\| p->buf[17] != 0)
71	return 0;
72
73	return AVPROBE_SCORE_MAX;
74	}
75
76	static int cin_read_file_header(CinDemuxContext cin, AVIOContext pb) {
77	CinFileHeader *hdr = &cin->file_header;
78
79	if (avio_rl32(pb) != 0x55AA0000)
80	return AVERROR_INVALIDDATA;
81
82	hdr->video_frame_size = avio_rl32(pb);
83	hdr->video_frame_width = avio_rl16(pb);
84	hdr->video_frame_height = avio_rl16(pb);
85	hdr->audio_frequency = avio_rl32(pb);
86	hdr->audio_bits = avio_r8(pb);
87	hdr->audio_stereo = avio_r8(pb);
88	hdr->audio_frame_size = avio_rl16(pb);
89
90	if (hdr->audio_frequency != 22050 \|\| hdr->audio_bits != 16 \|\| hdr->audio_stereo != 0)
91	return AVERROR_INVALIDDATA;
92
93	return 0;
94	}
95
96	static int cin_read_header(AVFormatContext *s)
97	{
98	int rc;
99	CinDemuxContext *cin = s->priv_data;
100	CinFileHeader *hdr = &cin->file_header;
101	AVIOContext *pb = s->pb;
102	AVStream *st;
103
104	rc = cin_read_file_header(cin, pb);
105	if (rc)
106	return rc;
107
108	cin->video_stream_pts = 0;
109	cin->audio_stream_pts = 0;
110	cin->audio_buffer_size = 0;
111
112	/* initialize the video decoder stream */
113	st = avformat_new_stream(s, NULL);
114	if (!st)
115	return AVERROR(ENOMEM);
116
117	avpriv_set_pts_info(st, 32, 1, 12);
118	cin->video_stream_index = st->index;
119	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
120	st->codec->codec_id = AV_CODEC_ID_DSICINVIDEO;
121	st->codec->codec_tag = 0; /* no fourcc */
122	st->codec->width = hdr->video_frame_width;
123	st->codec->height = hdr->video_frame_height;
124
125	/* initialize the audio decoder stream */
126	st = avformat_new_stream(s, NULL);
127	if (!st)
128	return AVERROR(ENOMEM);
129
130	avpriv_set_pts_info(st, 32, 1, 22050);
131	cin->audio_stream_index = st->index;
132	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
133	st->codec->codec_id = AV_CODEC_ID_DSICINAUDIO;
134	st->codec->codec_tag = 0; /* no tag */
135	st->codec->channels = 1;
136	st->codec->channel_layout = AV_CH_LAYOUT_MONO;
137	st->codec->sample_rate = 22050;
138	st->codec->bits_per_coded_sample = 8;
139	st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample * st->codec->channels;
140
141	return 0;
142	}
143
144	static int cin_read_frame_header(CinDemuxContext cin, AVIOContext pb) {
145	CinFrameHeader *hdr = &cin->frame_header;
146
147	hdr->video_frame_type = avio_r8(pb);
148	hdr->audio_frame_type = avio_r8(pb);
149	hdr->pal_colors_count = avio_rl16(pb);
150	hdr->video_frame_size = avio_rl32(pb);
151	hdr->audio_frame_size = avio_rl32(pb);
152
153	if (avio_feof(pb) \|\| pb->error)
154	return AVERROR(EIO);
155
156	if (avio_rl32(pb) != 0xAA55AA55)
157	return AVERROR_INVALIDDATA;
158	if (hdr->video_frame_size < 0 \|\| hdr->audio_frame_size < 0)
159	return AVERROR_INVALIDDATA;
160
161	return 0;
162	}
163
164	static int cin_read_packet(AVFormatContext s, AVPacket pkt)
165	{
166	CinDemuxContext *cin = s->priv_data;
167	AVIOContext *pb = s->pb;
168	CinFrameHeader *hdr = &cin->frame_header;
169	int rc, palette_type, pkt_size;
170	int ret;
171
172	if (cin->audio_buffer_size == 0) {
173	rc = cin_read_frame_header(cin, pb);
174	if (rc)
175	return rc;
176
177	if ((int16_t)hdr->pal_colors_count < 0) {
178	hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count;
179	palette_type = 1;
180	} else {
181	palette_type = 0;
182	}
183
184	/* palette and video packet */
185	pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size;
186
187	pkt_size = ffio_limit(pb, pkt_size);
188
189	ret = av_new_packet(pkt, 4 + pkt_size);
190	if (ret < 0)
191	return ret;
192
193	pkt->stream_index = cin->video_stream_index;
194	pkt->pts = cin->video_stream_pts++;
195
196	pkt->data[0] = palette_type;
197	pkt->data[1] = hdr->pal_colors_count & 0xFF;
198	pkt->data[2] = hdr->pal_colors_count >> 8;
199	pkt->data[3] = hdr->video_frame_type;
200
201	ret = avio_read(pb, &pkt->data[4], pkt_size);
202	if (ret < 0) {
203	av_free_packet(pkt);
204	return ret;
205	}
206	if (ret < pkt_size)
207	av_shrink_packet(pkt, 4 + ret);
208
209	/* sound buffer will be processed on next read_packet() call */
210	cin->audio_buffer_size = hdr->audio_frame_size;
211	return 0;
212	}
213
214	/* audio packet */
215	ret = av_get_packet(pb, pkt, cin->audio_buffer_size);
216	if (ret < 0)
217	return ret;
218
219	pkt->stream_index = cin->audio_stream_index;
220	pkt->pts = cin->audio_stream_pts;
221	pkt->duration = cin->audio_buffer_size - (pkt->pts == 0);
222	cin->audio_stream_pts += pkt->duration;
223	cin->audio_buffer_size = 0;
224	return 0;
225	}
226
227	AVInputFormat ff_dsicin_demuxer = {
228	.name = "dsicin",
229	.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN"),
230	.priv_data_size = sizeof(CinDemuxContext),
231	.read_probe = cin_probe,
232	.read_header = cin_read_header,
233	.read_packet = cin_read_packet,
234	};