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

/*
 * CRC encoder (for codec/format testing)
 * Copyright (c) 2002 Fabrice Bellard
 *
 * 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 <inttypes.h>

#include "libavutil/adler32.h"
#include "avformat.h"

typedef struct CRCState {
    uint32_t crcval;
} CRCState;

static int crc_write_header(struct AVFormatContext *s)
{
    CRCState *crc = s->priv_data;

    /* init CRC */
    crc->crcval = 1;

    return 0;
}

static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
    CRCState *crc = s->priv_data;
    crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
    return 0;
}

static int crc_write_trailer(struct AVFormatContext *s)
{
    CRCState *crc = s->priv_data;
    char buf[64];

    snprintf(buf, sizeof(buf), "CRC=0x%08"PRIx32"\n", crc->crcval);
    avio_write(s->pb, buf, strlen(buf));

    return 0;
}

AVOutputFormat ff_crc_muxer = {
    .name              = "crc",
    .long_name         = NULL_IF_CONFIG_SMALL("CRC testing"),
    .priv_data_size    = sizeof(CRCState),
    .audio_codec       = AV_CODEC_ID_PCM_S16LE,
    .video_codec       = AV_CODEC_ID_RAWVIDEO,
    .write_header      = crc_write_header,
    .write_packet      = crc_write_packet,
    .write_trailer     = crc_write_trailer,
    .flags             = AVFMT_NOTIMESTAMPS,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* CRC encoder (for codec/format testing)
	3	* Copyright (c) 2002 Fabrice Bellard
	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 <inttypes.h>
	23
	24	#include "libavutil/adler32.h"
	25	#include "avformat.h"
	26
	27	typedef struct CRCState {
	28	uint32_t crcval;
	29	} CRCState;
	30
	31	static int crc_write_header(struct AVFormatContext *s)
	32	{
	33	CRCState *crc = s->priv_data;
	34
	35	/* init CRC */
	36	crc->crcval = 1;
	37
	38	return 0;
	39	}
	40
	41	static int crc_write_packet(struct AVFormatContext s, AVPacket pkt)
	42	{
	43	CRCState *crc = s->priv_data;
	44	crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
	45	return 0;
	46	}
	47
	48	static int crc_write_trailer(struct AVFormatContext *s)
	49	{
	50	CRCState *crc = s->priv_data;
	51	char buf[64];
	52
	53	snprintf(buf, sizeof(buf), "CRC=0x%08"PRIx32"\n", crc->crcval);
	54	avio_write(s->pb, buf, strlen(buf));
	55
	56	return 0;
	57	}
	58
	59	AVOutputFormat ff_crc_muxer = {
	60	.name = "crc",
	61	.long_name = NULL_IF_CONFIG_SMALL("CRC testing"),
	62	.priv_data_size = sizeof(CRCState),
	63	.audio_codec = AV_CODEC_ID_PCM_S16LE,
	64	.video_codec = AV_CODEC_ID_RAWVIDEO,
65	.write_header = crc_write_header,
66	.write_packet = crc_write_packet,
67	.write_trailer = crc_write_trailer,
68	.flags = AVFMT_NOTIMESTAMPS,
69	};