-/*
+/*
* CRC decoder (for codec/format testing)
* Copyright (c) 2002 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 "adler32.h"
-/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#define BASE 65521L /* largest prime smaller than 65536 */
-#define NMAX 5552
-/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
-
-#define DO1(buf) {s1 += *buf++; s2 += s1;}
-#define DO2(buf) DO1(buf); DO1(buf);
-#define DO4(buf) DO2(buf); DO2(buf);
-#define DO8(buf) DO4(buf); DO4(buf);
-#define DO16(buf) DO8(buf); DO8(buf);
-
-unsigned long update_adler32(unsigned long adler, const uint8_t *buf, unsigned int len)
-{
- unsigned long s1 = adler & 0xffff;
- unsigned long s2 = (adler >> 16) & 0xffff;
- int k;
-
- if (buf == NULL) return 1L;
-
- while (len > 0) {
- k = len < NMAX ? len : NMAX;
- len -= k;
- while (k >= 16) {
- DO16(buf);
- k -= 16;
- }
- if (k != 0) do {
- DO1(buf);
- } while (--k);
- s1 %= BASE;
- s2 %= BASE;
- }
- return (s2 << 16) | s1;
-}
-
+#ifdef CONFIG_CRC_MUXER
typedef struct CRCState {
uint32_t crcval;
} CRCState;
CRCState *crc = s->priv_data;
/* init CRC */
- crc->crcval = update_adler32(0, NULL, 0);
+ crc->crcval = 1;
return 0;
}
static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
CRCState *crc = s->priv_data;
- crc->crcval = update_adler32(crc->crcval, pkt->data, pkt->size);
+ crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
return 0;
}
CRCState *crc = s->priv_data;
char buf[64];
- snprintf(buf, sizeof(buf), "CRC=%08x\n", crc->crcval);
+ snprintf(buf, sizeof(buf), "CRC=0x%08x\n", crc->crcval);
+ put_buffer(&s->pb, buf, strlen(buf));
+ put_flush_packet(&s->pb);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_FRAMECRC_MUXER
+static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
+{
+ uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
+ char buf[256];
+
+ snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc);
put_buffer(&s->pb, buf, strlen(buf));
put_flush_packet(&s->pb);
return 0;
}
+#endif
-static AVOutputFormat crc_format = {
+#ifdef CONFIG_CRC_MUXER
+AVOutputFormat crc_muxer = {
"crc",
"crc testing format",
NULL,
crc_write_packet,
crc_write_trailer,
};
-
-int crc_init(void)
-{
- av_register_output_format(&crc_format);
- return 0;
-}
+#endif
+#ifdef CONFIG_FRAMECRC_MUXER
+AVOutputFormat framecrc_muxer = {
+ "framecrc",
+ "framecrc testing format",
+ NULL,
+ "",
+ 0,
+ CODEC_ID_PCM_S16LE,
+ CODEC_ID_RAWVIDEO,
+ NULL,
+ framecrc_write_packet,
+ NULL,
+};
+#endif