[MPlayer-cvslog] r19141 - in trunk/libmpcodecs: Makefile mpeg_packetizer.c mpeg_packetizer.h
ben
subversion at mplayerhq.hu
Wed Jul 19 23:46:07 CEST 2006
Author: ben
Date: Wed Jul 19 23:46:06 2006
New Revision: 19141
Added:
trunk/libmpcodecs/mpeg_packetizer.c
trunk/libmpcodecs/mpeg_packetizer.h
Modified:
trunk/libmpcodecs/Makefile
Log:
new mpeg helpers to build and send mpeg 1/2 ps/pes packets (used by some vo drivers)
Modified: trunk/libmpcodecs/Makefile
==============================================================================
--- trunk/libmpcodecs/Makefile (original)
+++ trunk/libmpcodecs/Makefile Wed Jul 19 23:46:06 2006
@@ -310,6 +310,7 @@
$(VIDEO_SRCS) \
$(VFILTER_SRCS) \
$(NATIVE_SRCS) \
+ mpeg_packetizer.c \
img_format.c \
OBJS=$(SRCS:.c=.o)
Added: trunk/libmpcodecs/mpeg_packetizer.c
==============================================================================
--- (empty file)
+++ trunk/libmpcodecs/mpeg_packetizer.c Wed Jul 19 23:46:06 2006
@@ -0,0 +1,278 @@
+/*
+ * Copyright (C) 2006 Benjamin Zores
+ * Set of helper routines for building MPEG 1/2 PS/PES packets.
+ *
+ * Based on various code bororwed from vo_mpegpes/vo_dxr2 :
+ * (C) 2000 Ralph Metzler <ralph at convergence.de>
+ * Marcus Metzler <marcus at convergence.de>
+ * Gerard Lantau
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <unistd.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "mp_msg.h"
+#include "mpeg_packetizer.h"
+
+#define PES_MAX_SIZE 2048
+
+static unsigned char pes_header[PES_MAX_SIZE];
+
+static unsigned char ps_header[] = {
+ 0x00, 0x00, 0x01, 0xba, 0x44, 0x00, 0x04, 0x00,
+ 0x04, 0x01, 0x01, 0x86, 0xa3, 0xf8
+};
+
+/* Send MPEG 1 PES packet */
+int
+send_mpeg1_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len))
+{
+ int ptslen = pts ? 5 : 1;
+ int n = 0;
+
+ mp_msg (MSGT_HEADER, MSGL_DBG2,
+ "MPEG1 PES packet: 0x%x => %lu \n", id, pts);
+ memset (pes_header, '\0', PES_MAX_SIZE);
+
+ /* startcode */
+ pes_header[0] = 0;
+ pes_header[1] = 0;
+ pes_header[2] = id >> 8;
+ pes_header[3] = id & 255;
+
+ while (len > 0)
+ {
+ int payload_size = len; /* data + PTS */
+ if (6 + ptslen + payload_size > PES_MAX_SIZE)
+ payload_size = PES_MAX_SIZE - (6 + ptslen);
+
+ /* construct PES header: packetsize */
+ pes_header[4] = (ptslen + payload_size) >> 8;
+ pes_header[5] = (ptslen + payload_size) & 255;
+
+ if (ptslen == 5)
+ {
+ int x;
+ /* presentation time stamp */
+ x = (0x02 << 4) | (((pts >> 30) & 0x07) << 1) | 1;
+ pes_header[6] = x;
+
+ x = ((((pts >> 15) & 0x7fff) << 1) | 1);
+ pes_header[7] = x >> 8;
+ pes_header[8] = x & 255;
+
+ x = (((pts & 0x7fff) << 1) | 1);
+ pes_header[9] = x >> 8;
+ pes_header[10] = x & 255;
+ }
+ else
+ {
+ /* stuffing and header bits */
+ pes_header[6] = 0x0f;
+ }
+
+ memcpy (&pes_header[6 + ptslen], data, payload_size);
+ n += my_write (pes_header, 6 + ptslen + payload_size);
+
+ len -= payload_size;
+ data += payload_size;
+ ptslen = 1; /* store PTS only once, at first packet! */
+ }
+
+ return n;
+}
+
+/* Send MPEG 1 PS packet */
+int
+send_mpeg1_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len))
+{
+ my_write (ps_header, sizeof (ps_header));
+ return send_mpeg1_pes_packet (data, len, id, pts, my_write);
+}
+
+/* Send MPEG 2 PES packet */
+int
+send_mpeg2_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len))
+{
+ int ptslen = 5;
+ int n = 0;
+
+ mp_msg (MSGT_HEADER, MSGL_DBG2,
+ "MPEG2 PES packet: 0x%x => %lu \n", id, pts);
+ memset (pes_header, '\0', PES_MAX_SIZE);
+
+ /* startcode */
+ pes_header[0] = 0;
+ pes_header[1] = 0;
+ pes_header[2] = 0x01;
+ pes_header[3] = id; /* stream id */
+
+ while (len > 0)
+ {
+ int payload_size = len; /* data + PTS */
+ if (9 + ptslen + payload_size > PES_MAX_SIZE)
+ payload_size = PES_MAX_SIZE - (6 + ptslen);
+
+ /* construct PES header: packetize */
+ pes_header[4] = (3 + ptslen + payload_size) >> 8;
+ pes_header[5] = (3 + ptslen + payload_size) & 255;
+ pes_header[6] = 0x81;
+
+ if (ptslen)
+ {
+ int x;
+ pes_header[7] = 0x80;
+ pes_header[8] = ptslen;
+
+ /* presentation time stamp */
+ x = (0x02 << 4) | (((pts >> 30) & 0x07) << 1) | 1;
+ pes_header[9] = x;
+
+ x = ((((pts >> 15) & 0x7fff) << 1) | 1);
+ pes_header[10] = x >>8;
+ pes_header[11] = x & 255;
+
+ x = (((pts & 0x7fff) << 1) | 1);
+ pes_header[12] = x >> 8;
+ pes_header[13] = x & 255;
+ }
+ else
+ {
+ pes_header[7] = 0x00;
+ pes_header[8] = 0x00;
+ }
+
+ my_write (pes_header, 9 + ptslen);
+ n += my_write (data, payload_size);
+
+ len -= payload_size;
+ data += payload_size;
+ ptslen = 0; /* store PTS only once, at first packet! */
+ }
+
+ return n;
+}
+
+/* Send MPEG 2 PS packet */
+int
+send_mpeg2_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len))
+{
+ my_write (ps_header, sizeof (ps_header));
+ return send_mpeg2_pes_packet (data, len, id, pts, my_write);
+}
+
+/* Send MPEG LPCM packet */
+int
+send_mpeg_lpcm_packet (unsigned char* data, int len,
+ int id, uint64_t pts, int freq_id,
+ int my_write (unsigned char *data, int len))
+{
+ int ptslen = pts ? 5 : 0;
+ int n = 0;
+
+ mp_msg (MSGT_HEADER, MSGL_DBG2,
+ "MPEG LPCM packet: 0x%x => %lu \n", id, pts);
+ memset (pes_header, '\0', PES_MAX_SIZE);
+
+ /* startcode */
+ pes_header[0] = 0;
+ pes_header[1] = 0;
+ pes_header[2] = 1;
+ pes_header[3] = 0xBD; /* stream id */
+
+ while (len >= 4)
+ {
+ int payload_size = PES_MAX_SIZE - 6 - 20; /* max possible data len */
+ if( payload_size > len)
+ payload_size = len;
+
+ payload_size &= ~3; /* align! */
+
+ /* packetsize */
+ pes_header[4] = (payload_size + 3 + ptslen + 7) >> 8;
+ pes_header[5] = (payload_size + 3 + ptslen + 7) & 255;
+
+ /* stuffing */
+ /* TTCCxxxx CC=css TT=type: 1=STD 0=mpeg1 2=vob */
+ pes_header[6] = 0x81;
+
+ /* FFxxxxxx FF=pts flags=2 vs 0 */
+ pes_header[7] = ptslen ? 0x80 : 0;
+
+ /* header length */
+ pes_header[8] = ptslen;
+
+ if (ptslen)
+ {
+ int x;
+
+ /* presentation time stamp */
+ x = (0x02 << 4) | (((pts >> 30) & 0x07) << 1) | 1;
+ pes_header[9] = x;
+
+ x = ((((pts >> 15) & 0x7fff) << 1) | 1);
+ pes_header[10] = x >> 8;
+ pes_header[11] = x &255;
+
+ x = (((pts & 0x7fff) << 1) | 1);
+ pes_header[12] = x >> 8;
+ pes_header[13] = x & 255;
+ }
+
+ /* ============ LPCM header: (7 bytes) ================= */
+ /* Info by mocm at convergence.de */
+
+ /* ID */
+ pes_header[ptslen + 9] = id;
+
+ /* number of frames */
+ pes_header[ptslen + 10] = 0x07;
+
+ /* first acces unit pointer, i.e. start of audio frame */
+ pes_header[ptslen + 11] = 0x00;
+ pes_header[ptslen + 12] = 0x04;
+
+ /* audio emphasis on-off 1 bit */
+ /* audio mute on-off 1 bit */
+ /* reserved 1 bit */
+ /* audio frame number 5 bit */
+ pes_header[ptslen + 13] = 0x0C;
+
+ /* quantization word length 2 bit */
+ /* audio sampling frequency (48khz = 0, 96khz = 1) 2 bit */
+ /* reserved 1 bit */
+ /* number of audio channels - 1 (e.g. stereo = 1) 3 bit */
+ pes_header[ptslen + 14] = 1 | (freq_id << 4);
+
+ /* dynamic range control (0x80 if off) */
+ pes_header [ptslen + 15] = 0x80;
+
+ memcpy (&pes_header[6 + 3 + ptslen + 7], data, payload_size);
+ n += my_write (pes_header, 6 + 3 + ptslen + 7 + payload_size);
+
+ len -= payload_size;
+ data += payload_size;
+ ptslen = 0; /* store PTS only once, at first packet! */
+ }
+
+ return n;
+}
Added: trunk/libmpcodecs/mpeg_packetizer.h
==============================================================================
--- (empty file)
+++ trunk/libmpcodecs/mpeg_packetizer.h Wed Jul 19 23:46:06 2006
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2006 Benjamin Zores
+ * Set of helper routines for building MPEG 1/2 PS/PES packets.
+ *
+ * Based on various code bororwed from vo_mpegpes/vo_dxr2 :
+ * (C) 2000 Ralph Metzler <ralph at convergence.de>
+ * Marcus Metzler <marcus at convergence.de>
+ * Gerard Lantau
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _MPEG_PACKETIZER_H_
+#define _MPEG_PACKETIZER_H_
+
+/* Send MPEG 1 PES packet */
+int send_mpeg1_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len));
+
+/* Send MPEG 1 PS packet */
+int send_mpeg1_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len));
+/* Send MPEG 2 PES packet */
+int send_mpeg2_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len));
+
+/* Send MPEG 2 PS packet */
+int send_mpeg2_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
+ int my_write (unsigned char *data, int len));
+
+/* Send MPEG LPCM packet */
+int send_mpeg_lpcm_packet (unsigned char *data, int len,
+ int id, uint64_t pts, int freq_id,
+ int my_write (unsigned char *data, int len));
+
+#endif /* _MPEG_PACKETIZER_H_ */
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