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Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/rtp/gstrtph263pay.c
Mark Nauwelaerts a08f76a92e rtph263pay: use found GOBs to apply Mode A payloading 
... rather than falling back to sending the whole frame in one packet
if number of GOB startcodes < maximum.
One might take this further and still perform Mode B/C payloading,
but at least this should cater for decent fragments in typical cases.

Fixes #599585.
2010-04-30 13:49:43 +02:00

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/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim.taymans@gmail.com>
* Copyright (C) <2008> Dejan Sakelsak <dejan.sakelsak@marand.si>
* Copyright (C) <2009> Janin Kolenc <janin.kolenc@marand.si>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtph263pay.h"
typedef enum
{
GST_H263_FRAME_TYPE_I = 0,
GST_H263_FRAME_TYPE_P = 1,
GST_H263_FRAME_TYPE_PB = 2
} GstRtpH263PayFrameType;
typedef enum
{
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_RES1 = 0,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_SQCIF = 1,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_QCIF = 2,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_CIF = 3,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_4CIF = 4,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_16CIF = 5,
GST_RTP_H263_PAYLOAD_PICTURE_FORMAT_RES2 = 6,
GST_H263_PAYLOAD_PICTURE_FORMAT_PLUS = 7
} GstRtpH263PayPictureFormat;
static guint format_props[8][2] = { {254, 254},
{6, 8},
{9, 11},
{18, 22},
{18, 88},
{18, 352},
{254, 254},
{255, 255}
};
/*
* I-frame MCBPC table: code, mask, nbits, cb, cr, mb type -> 10 = undefined (because we have guint)
*/
#define MCBPC_I_LEN 9
#define MCBPC_I_WID 6
static guint32 mcbpc_I[9][6] = {
{0x8000, 0x8000, 1, 0, 0, 3},
{0x2000, 0xe000, 3, 0, 1, 3},
{0x4000, 0xe000, 3, 1, 0, 3},
{0x6000, 0xe000, 3, 1, 1, 3},
{0x1000, 0xf000, 4, 0, 0, 4},
{0x0400, 0xfc00, 6, 0, 1, 4},
{0x0800, 0xfc00, 6, 1, 0, 4},
{0x0c00, 0xfc00, 6, 1, 1, 4},
{0x0080, 0xff80, 9, 10, 10, 10}
};
/*
* P-frame MCBPC table: code, mask, nbits, cb, cr, mb type -> 10 = undefined (because we have guint)
*/
#define MCBPC_P_LEN 21
#define MCBPC_P_WID 6
static guint16 mcbpc_P[21][6] = {
{0x8000, 0x8000, 1, 0, 0, 0},
{0x3000, 0xf000, 4, 0, 1, 0},
{0x2000, 0xf000, 4, 1, 0, 0},
{0x1400, 0xfc00, 6, 1, 1, 0},
{0x6000, 0xe000, 3, 0, 0, 1},
{0x0e00, 0xfe00, 7, 0, 1, 1},
{0x0c00, 0xfe00, 7, 1, 0, 1},
{0x0280, 0xff80, 9, 1, 1, 1},
{0x4000, 0xe000, 3, 0, 0, 2},
{0x0a00, 0xfe00, 7, 0, 1, 2},
{0x0800, 0xfe00, 7, 1, 0, 2},
{0x0500, 0xff00, 8, 1, 1, 2},
{0x1800, 0xf800, 5, 0, 0, 3},
{0x0400, 0xff00, 8, 0, 1, 3},
{0x0300, 0xff00, 8, 1, 0, 3},
{0x0600, 0xfe00, 7, 1, 1, 3},
{0x1000, 0xfc00, 6, 0, 0, 4},
{0x0200, 0xff80, 9, 0, 1, 4},
{0x0180, 0xff80, 9, 1, 0, 4},
{0x0100, 0xff80, 9, 1, 1, 4},
{0x0080, 0xff80, 9, 10, 10, 10}
};
/*
* I-frame CBPY (code, mask, nbits, Y0, Y1, Y2, Y3)
*/
#define CBPY_LEN 16
#define CBPY_WID 7
static guint8 cbpy_I[16][7] = {
{0x30, 0xf0, 4, 0, 0, 0, 0},
{0x28, 0xf8, 5, 0, 0, 0, 1},
{0x20, 0xf8, 5, 0, 0, 1, 0},
{0x90, 0xf0, 4, 0, 0, 1, 1},
{0x18, 0xf8, 5, 0, 1, 0, 0},
{0x70, 0xf0, 4, 0, 1, 0, 1},
{0x08, 0xfc, 6, 0, 1, 1, 0},
{0xb0, 0xf0, 4, 0, 1, 1, 1},
{0x10, 0xf8, 5, 1, 0, 0, 0},
{0x0c, 0xfc, 6, 1, 0, 0, 1},
{0x50, 0xf0, 4, 1, 0, 1, 0},
{0xa0, 0xf0, 4, 1, 0, 1, 1},
{0x40, 0xf0, 4, 1, 1, 0, 0},
{0x80, 0xf0, 4, 1, 1, 0, 1},
{0x60, 0xf0, 4, 1, 1, 1, 0},
{0xc0, 0xc0, 2, 1, 1, 1, 1}
};
/*
* P-frame CBPY (code, mask, nbits, Y0, Y1, Y2, Y3)
*/
static guint8 cbpy_P[16][7] = {
{0x30, 0xf0, 4, 1, 1, 1, 1},
{0x28, 0xf8, 5, 1, 1, 1, 0},
{0x20, 0xf8, 5, 1, 1, 0, 1},
{0x90, 0xf0, 4, 1, 1, 0, 0},
{0x18, 0xf8, 5, 1, 0, 1, 1},
{0x70, 0xf0, 4, 1, 0, 1, 0},
{0x08, 0xfc, 6, 1, 0, 0, 1},
{0xb0, 0xf0, 4, 1, 0, 0, 0},
{0x10, 0xf8, 5, 0, 1, 1, 1},
{0x0c, 0xfc, 6, 0, 1, 1, 0},
{0x50, 0xf0, 4, 0, 1, 0, 1},
{0xa0, 0xf0, 4, 0, 1, 0, 0},
{0x40, 0xf0, 4, 0, 0, 1, 1},
{0x80, 0xf0, 4, 0, 0, 1, 0},
{0x60, 0xf0, 4, 0, 0, 0, 1},
{0xc0, 0xc0, 2, 0, 0, 0, 0}
};
/*
* Block TCOEF table (code, mask, nbits, LAST, RUN, LEVEL)
*/
#define TCOEF_LEN 103
#define TCOEF_WID 6
static guint16 tcoef[103][6] = {
{0x8000, 0xc000, 3, 0, 0, 1},
{0xf000, 0xf000, 5, 0, 0, 2},
{0x5400, 0xfc00, 7, 0, 0, 3},
{0x2e00, 0xfe00, 8, 0, 0, 4},
{0x1f00, 0xff00, 9, 0, 0, 5},
{0x1280, 0xff80, 10, 0, 0, 6},
{0x1200, 0xff80, 10, 0, 0, 7},
{0x0840, 0xffc0, 11, 0, 0, 8},
{0x0800, 0xffc0, 11, 0, 0, 9},
{0x00e0, 0xffe0, 12, 0, 0, 10}, //10
{0x00c0, 0xffe0, 12, 0, 0, 11},
{0x0400, 0xffe0, 12, 0, 0, 12},
{0xc000, 0xe000, 4, 0, 1, 1},
{0x5000, 0xfc00, 7, 0, 1, 2},
{0x1e00, 0xff00, 9, 0, 1, 3},
{0x03c0, 0xffc0, 11, 0, 1, 4},
{0x0420, 0xffe0, 12, 0, 1, 5},
{0x0500, 0xfff0, 13, 0, 1, 6},
{0xe000, 0xf000, 5, 0, 2, 1},
{0x1d00, 0xff00, 9, 0, 2, 2}, //20
{0x0380, 0xffc0, 11, 0, 2, 3},
{0x0510, 0xfff0, 13, 0, 2, 4},
{0x6800, 0xf800, 6, 0, 3, 1},
{0x1180, 0xff80, 10, 0, 3, 2},
{0x0340, 0xffc0, 11, 0, 3, 3},
{0x6000, 0xf800, 6, 0, 4, 1},
{0x1100, 0xff80, 10, 0, 4, 2},
{0x0520, 0xfff0, 13, 0, 4, 3},
{0x5800, 0xf800, 6, 0, 5, 1},
{0x0300, 0xffc0, 11, 0, 5, 2}, // 30
{0x0530, 0xfff0, 13, 0, 5, 3},
{0x4c00, 0xfc00, 7, 0, 6, 1},
{0x02c0, 0xffc0, 11, 0, 6, 2},
{0x0540, 0xfff0, 13, 0, 6, 3},
{0x4800, 0xfc00, 7, 0, 7, 1},
{0x0280, 0xffc0, 11, 0, 7, 2},
{0x4400, 0xfc00, 7, 0, 8, 1},
{0x0240, 0xffc0, 11, 0, 8, 2},
{0x4000, 0xfc00, 7, 0, 9, 1},
{0x0200, 0xffc0, 11, 0, 9, 2}, // 40
{0x2c00, 0xfe00, 8, 0, 10, 1},
{0x0550, 0xfff0, 13, 0, 10, 2},
{0x2a00, 0xfe00, 8, 0, 11, 1},
{0x2800, 0xfe00, 8, 0, 12, 1},
{0x1c00, 0xff00, 9, 0, 13, 1},
{0x1b00, 0xff00, 9, 0, 14, 1},
{0x1080, 0xff80, 10, 0, 15, 1},
{0x1000, 0xff80, 10, 0, 16, 1},
{0x0f80, 0xff80, 10, 0, 17, 1},
{0x0f00, 0xff80, 10, 0, 18, 1}, // 50
{0x0e80, 0xff80, 10, 0, 19, 1},
{0x0e00, 0xff80, 10, 0, 20, 1},
{0x0d80, 0xff80, 10, 0, 21, 1},
{0x0d00, 0xff80, 10, 0, 22, 1},
{0x0440, 0xffe0, 12, 0, 23, 1},
{0x0460, 0xffe0, 12, 0, 24, 1},
{0x0560, 0xfff0, 13, 0, 25, 1},
{0x0570, 0xfff0, 13, 0, 26, 1},
{0x7000, 0xf000, 5, 1, 0, 1},
{0x0c80, 0xff80, 10, 1, 0, 2}, // 60
{0x00a0, 0xffe0, 12, 1, 0, 3},
{0x3c00, 0xfc00, 7, 1, 1, 1},
{0x0080, 0xffe0, 12, 1, 1, 2},
{0x3800, 0xfc00, 7, 1, 2, 1},
{0x3400, 0xfc00, 7, 1, 3, 1},
{0x3000, 0xfc00, 7, 1, 4, 1},
{0x2600, 0xfe00, 8, 1, 5, 1},
{0x2400, 0xfe00, 8, 1, 6, 1},
{0x2200, 0xfe00, 8, 1, 7, 1},
{0x2000, 0xfe00, 8, 1, 8, 1}, // 70
{0x1a00, 0xff00, 9, 1, 9, 1},
{0x1900, 0xff00, 9, 1, 10, 1},
{0x1800, 0xff00, 9, 1, 11, 1},
{0x1700, 0xff00, 9, 1, 12, 1},
{0x1600, 0xff00, 9, 1, 13, 1},
{0x1500, 0xff00, 9, 1, 14, 1},
{0x1400, 0xff00, 9, 1, 15, 1},
{0x1300, 0xff00, 9, 1, 16, 1},
{0x0c00, 0xff80, 10, 1, 17, 1},
{0x0b80, 0xff80, 10, 1, 18, 1}, // 80
{0x0b00, 0xff80, 10, 1, 19, 1},
{0x0a80, 0xff80, 10, 1, 20, 1},
{0x0a00, 0xff80, 10, 1, 21, 1},
{0x0980, 0xff80, 10, 1, 22, 1},
{0x0900, 0xff80, 10, 1, 23, 1},
{0x0880, 0xff80, 10, 1, 24, 1},
{0x01c0, 0xffc0, 11, 1, 25, 1},
{0x0180, 0xffc0, 11, 1, 26, 1},
{0x0140, 0xffc0, 11, 1, 27, 1},
{0x0100, 0xffc0, 11, 1, 28, 1}, // 90
{0x0480, 0xffe0, 12, 1, 29, 1},
{0x04a0, 0xffe0, 12, 1, 30, 1},
{0x04c0, 0xffe0, 12, 1, 31, 1},
{0x04e0, 0xffe0, 12, 1, 32, 1},
{0x0580, 0xfff0, 13, 1, 33, 1},
{0x0590, 0xfff0, 13, 1, 34, 1},
{0x05a0, 0xfff0, 13, 1, 35, 1},
{0x05b0, 0xfff0, 13, 1, 36, 1},
{0x05c0, 0xfff0, 13, 1, 37, 1},
{0x05d0, 0xfff0, 13, 1, 38, 1}, // 100
{0x05e0, 0xfff0, 13, 1, 39, 1},
{0x05f0, 0xfff0, 13, 1, 40, 1},
{0x0600, 0xfe00, 7, 0, 0xffff, 0xffff}
};
/*
* Motion vector code table (Code, mask, nbits, vector (halfpixel, two's complement), diff (halfpixel, two's complement))
*/
#define MVD_LEN 64
#define MVD_WID 5
static guint16 mvd[64][5] = {
{0x0028, 0xfff8, 13, 0x0060, 0x0020},
{0x0038, 0xfff8, 13, 0x0061, 0x0021},
{0x0050, 0xfff0, 12, 0x0062, 0x0022},
{0x0070, 0xfff0, 12, 0x0063, 0x0023},
{0x0090, 0xfff0, 12, 0x0064, 0x0024},
{0x00b0, 0xfff0, 12, 0x0065, 0x0025},
{0x00d0, 0xfff0, 12, 0x0066, 0x0026},
{0x00f0, 0xfff0, 12, 0x0067, 0x0027},
{0x0120, 0xffe0, 11, 0x0068, 0x0028},
{0x0160, 0xffe0, 11, 0x0069, 0x0029},
{0x01a0, 0xffe0, 11, 0x006a, 0x002a},
{0x01e0, 0xffe0, 11, 0x006b, 0x002b},
{0x0220, 0xffe0, 11, 0x006c, 0x002c},
{0x0260, 0xffe0, 11, 0x006d, 0x002d},
{0x02a0, 0xffe0, 11, 0x006e, 0x002e},
{0x02e0, 0xffe0, 11, 0x006f, 0x002f},
{0x0320, 0xffe0, 11, 0x0070, 0x0030},
{0x0360, 0xffe0, 11, 0x0071, 0x0031},
{0x03a0, 0xffe0, 11, 0x0072, 0x0032},
{0x03e0, 0xffe0, 11, 0x0073, 0x0033},
{0x0420, 0xffe0, 11, 0x0074, 0x0034},
{0x0460, 0xffe0, 11, 0x0075, 0x0035},
{0x04c0, 0xffc0, 10, 0x0076, 0x0036},
{0x0540, 0xffc0, 10, 0x0077, 0x0037},
{0x05c0, 0xffc0, 10, 0x0078, 0x0038},
{0x0700, 0xff00, 8, 0x0079, 0x0039},
{0x0900, 0xff00, 8, 0x007a, 0x003a},
{0x0b00, 0xff00, 8, 0x007b, 0x003b},
{0x0e00, 0xfe00, 7, 0x007c, 0x003c},
{0x1800, 0xf800, 5, 0x007d, 0x003d},
{0x3000, 0xf000, 4, 0x007e, 0x003e},
{0x6000, 0xe000, 3, 0x007f, 0x003f},
{0x8000, 0x8000, 1, 0x0000, 0x0000},
{0x4000, 0xe000, 3, 0x0001, 0x0041},
{0x2000, 0xf000, 4, 0x0002, 0x0042},
{0x1000, 0xf800, 5, 0x0003, 0x0043},
{0x0c00, 0xfe00, 7, 0x0004, 0x0044},
{0x0a00, 0xff00, 8, 0x0005, 0x0045},
{0x0800, 0xff00, 8, 0x0006, 0x0046},
{0x0600, 0xff00, 8, 0x0007, 0x0047},
{0x0580, 0xffc0, 10, 0x0008, 0x0048},
{0x0500, 0xffc0, 10, 0x0009, 0x0049},
{0x0480, 0xffc0, 10, 0x000a, 0x004a},
{0x0440, 0xffe0, 11, 0x000b, 0x004b},
{0x0400, 0xffe0, 11, 0x000c, 0x004c},
{0x03c0, 0xffe0, 11, 0x000d, 0x004d},
{0x0380, 0xffe0, 11, 0x000e, 0x004e},
{0x0340, 0xffe0, 11, 0x000f, 0x004f},
{0x0300, 0xffe0, 11, 0x0010, 0x0050},
{0x02c0, 0xffe0, 11, 0x0011, 0x0051},
{0x0280, 0xffe0, 11, 0x0012, 0x0052},
{0x0240, 0xffe0, 11, 0x0013, 0x0053},
{0x0200, 0xffe0, 11, 0x0014, 0x0054},
{0x01c0, 0xffe0, 11, 0x0015, 0x0055},
{0x0180, 0xffe0, 11, 0x0016, 0x0056},
{0x0140, 0xffe0, 11, 0x0017, 0x0057},
{0x0100, 0xffe0, 11, 0x0018, 0x0058},
{0x00e0, 0xfff0, 12, 0x0019, 0x0059},
{0x00c0, 0xfff0, 12, 0x001a, 0x005a},
{0x00a0, 0xfff0, 12, 0x001b, 0x005b},
{0x0080, 0xfff0, 12, 0x001c, 0x005c},
{0x0060, 0xfff0, 12, 0x001d, 0x005d},
{0x0040, 0xfff0, 12, 0x001e, 0x005e},
{0x0030, 0xfff8, 13, 0x001f, 0x005f}
};
GST_DEBUG_CATEGORY_STATIC (rtph263pay_debug);
#define GST_CAT_DEFAULT (rtph263pay_debug)
#define GST_RTP_HEADER_LEN 12
enum
{
PROP_0,
PROP_MODE_A_ONLY
};
static GstStaticPadTemplate gst_rtp_h263_pay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h263, "
"variant = (string) \"itu\", " "h263version = (string) \"h263\"")
);
static GstStaticPadTemplate gst_rtp_h263_pay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"payload = (int) " GST_RTP_PAYLOAD_H263_STRING ", "
"clock-rate = (int) 90000, " "encoding-name = (string) \"H263\"; "
"application/x-rtp, "
"media = (string) \"video\", "
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) 90000, " "encoding-name = (string) \"H263\"")
);
static void gst_rtp_h263_pay_finalize (GObject * object);
static gboolean gst_rtp_h263_pay_setcaps (GstBaseRTPPayload * payload,
GstCaps * caps);
static void gst_rtp_h263_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_h263_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_rtp_h263_pay_handle_buffer (GstBaseRTPPayload *
payload, GstBuffer * buffer);
static void gst_rtp_h263_pay_boundry_init (GstRtpH263PayBoundry * boundry,
guint8 * start, guint8 * end, guint8 sbit, guint8 ebit);
static GstRtpH263PayGob *gst_rtp_h263_pay_gob_new (GstRtpH263PayBoundry *
boundry, guint gobn);
static GstRtpH263PayMB *gst_rtp_h263_pay_mb_new (GstRtpH263PayBoundry * boundry,
guint mba);
static GstRtpH263PayPackage *gst_rtp_h263_pay_package_new_empty ();
static GstRtpH263PayPackage *gst_rtp_h263_pay_package_new (guint8 * start,
guint8 * end, guint length, guint8 sbit, guint8 ebit, GstBuffer * outbuf,
gboolean marker);
static void gst_rtp_h263_pay_mb_destroy (GstRtpH263PayMB * mb);
static void gst_rtp_h263_pay_gob_destroy (GstRtpH263PayGob * gob, guint ind);
static void gst_rtp_h263_pay_context_destroy (GstRtpH263PayContext * context,
guint ind);
static void gst_rtp_h263_pay_package_destroy (GstRtpH263PayPackage * pack);
GST_BOILERPLATE (GstRtpH263Pay, gst_rtp_h263_pay, GstBaseRTPPayload,
GST_TYPE_BASE_RTP_PAYLOAD)
static void gst_rtp_h263_pay_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_h263_pay_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_h263_pay_sink_template));
gst_element_class_set_details_simple (element_class,
"RTP H263 packet payloader", "Codec/Payloader/Network",
"Payload-encodes H263 video in RTP packets (RFC 2190)",
"Neil Stratford <neils@vipadia.com>"
"Dejan Sakelsak <dejan.sakelsak@marand.si>");
}
static void
gst_rtp_h263_pay_class_init (GstRtpH263PayClass * klass)
{
GObjectClass *gobject_class;
GstBaseRTPPayloadClass *gstbasertppayload_class;
gobject_class = (GObjectClass *) klass;
gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
gobject_class->finalize = gst_rtp_h263_pay_finalize;
gstbasertppayload_class->set_caps = gst_rtp_h263_pay_setcaps;
gstbasertppayload_class->handle_buffer = gst_rtp_h263_pay_handle_buffer;
gobject_class->set_property = gst_rtp_h263_pay_set_property;
gobject_class->get_property = gst_rtp_h263_pay_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_MODE_A_ONLY, g_param_spec_boolean ("modea-only",
"Fragment packets in mode A Only",
"Disable packetization modes B and C", DEFAULT_MODE_A,
G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT (rtph263pay_debug, "rtph263pay", 0,
"H263 RTP Payloader");
}
static void
gst_rtp_h263_pay_init (GstRtpH263Pay * rtph263pay, GstRtpH263PayClass * klass)
{
rtph263pay->adapter = gst_adapter_new ();
rtph263pay->prop_payload_mode = DEFAULT_MODE_A;
}
static void
gst_rtp_h263_pay_finalize (GObject * object)
{
GstRtpH263Pay *rtph263pay;
rtph263pay = GST_RTP_H263_PAY (object);
g_object_unref (rtph263pay->adapter);
rtph263pay->adapter = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rtp_h263_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
{
gboolean res;
payload->pt = GST_RTP_PAYLOAD_H263;
gst_basertppayload_set_options (payload, "video", TRUE, "H263", 90000);
res = gst_basertppayload_set_outcaps (payload, NULL);
return res;
}
static void
gst_rtp_h263_pay_context_destroy (GstRtpH263PayContext * context, guint ind)
{
if (!context)
return;
if (context->gobs) {
guint i;
for (i = 0; i < format_props[ind][0]; i++) {
if (context->gobs[i]) {
gst_rtp_h263_pay_gob_destroy (context->gobs[i], ind);
}
}
g_free (context->gobs);
}
g_free (context);
}
static void
gst_rtp_h263_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpH263Pay *rtph263pay;
rtph263pay = GST_RTP_H263_PAY (object);
switch (prop_id) {
case PROP_MODE_A_ONLY:
rtph263pay->prop_payload_mode = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_h263_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpH263Pay *rtph263pay;
rtph263pay = GST_RTP_H263_PAY (object);
switch (prop_id) {
case PROP_MODE_A_ONLY:
g_value_set_boolean (value, rtph263pay->prop_payload_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstRtpH263PayPackage *
gst_rtp_h263_pay_package_new_empty (void)
{
return (GstRtpH263PayPackage *) g_malloc0 (sizeof (GstRtpH263PayPackage));
}
static GstRtpH263PayPackage *
gst_rtp_h263_pay_package_new (guint8 * start, guint8 * end, guint length,
guint8 sbit, guint8 ebit, GstBuffer * outbuf, gboolean marker)
{
GstRtpH263PayPackage *package;
package = gst_rtp_h263_pay_package_new_empty ();
package->payload_start = start;
package->payload_end = end;
package->payload_len = length;
package->sbit = sbit;
package->ebit = ebit;
package->outbuf = outbuf;
package->marker = marker;
return package;
}
static void
gst_rtp_h263_pay_package_destroy (GstRtpH263PayPackage * pack)
{
if (pack)
g_free (pack);
}
static void
gst_rtp_h263_pay_boundry_init (GstRtpH263PayBoundry * boundry,
guint8 * start, guint8 * end, guint8 sbit, guint8 ebit)
{
boundry->start = start;
boundry->end = end;
boundry->sbit = sbit;
boundry->ebit = ebit;
}
static void
gst_rtp_h263_pay_splat_header_A (guint8 * header,
GstRtpH263PayPackage * package, GstRtpH263PayPic * piclayer)
{
GstRtpH263PayAHeader *a_header;
a_header = (GstRtpH263PayAHeader *) header;
a_header->f = 0;
a_header->p = 0;
a_header->sbit = package->sbit;
a_header->ebit = package->ebit;
a_header->src = GST_H263_PICTURELAYER_PLSRC (piclayer);
a_header->i = GST_H263_PICTURELAYER_PLTYPE (piclayer);
a_header->u = GST_H263_PICTURELAYER_PLUMV (piclayer);
a_header->s = GST_H263_PICTURELAYER_PLSAC (piclayer);
a_header->a = GST_H263_PICTURELAYER_PLAP (piclayer);
a_header->r1 = 0;
a_header->r2 = 0;
a_header->dbq = 0;
a_header->trb = 0;
a_header->tr = 0;
}
static void
gst_rtp_h263_pay_splat_header_B (guint8 * header,
GstRtpH263PayPackage * package, GstRtpH263PayPic * piclayer)
{
GstRtpH263PayBHeader *b_header;
b_header = (GstRtpH263PayBHeader *) header;
b_header->f = 1;
b_header->p = 0;
b_header->sbit = package->sbit;
b_header->ebit = package->ebit;
b_header->src = GST_H263_PICTURELAYER_PLSRC (piclayer);
b_header->quant = package->quant;
b_header->gobn = package->gobn;
b_header->mba1 = package->mba >> 6;
b_header->mba2 = package->mba & 0x003f;
b_header->r = 0;
b_header->i = GST_H263_PICTURELAYER_PLTYPE (piclayer);
b_header->u = GST_H263_PICTURELAYER_PLUMV (piclayer);
b_header->s = GST_H263_PICTURELAYER_PLSAC (piclayer);
b_header->a = GST_H263_PICTURELAYER_PLAP (piclayer);
b_header->hmv11 = 0;
b_header->hmv12 = 0;
b_header->vmv11 = 0;
b_header->vmv12 = 0;
b_header->hmv21 = 0;
b_header->hmv22 = 0;
b_header->vmv21 = 0;
if (package->nmvd > 0) {
//mvd[0]
b_header->hmv11 = (package->mvd[0] & 0x7f) >> 3;
b_header->hmv12 = (package->mvd[0] & 0x07);
//mvd[1]
b_header->vmv11 = (package->mvd[1] & 0x07f) >> 2;
b_header->vmv12 = (package->mvd[1] & 0x03);
if (package->nmvd == 8) {
//mvd[4]
b_header->hmv21 = (package->mvd[4] & 0x7f) >> 1;
b_header->hmv22 = (package->mvd[4] & 0x01);
//mvd[5]
b_header->vmv21 = (package->mvd[5] & 0x7f);
}
}
}
static gboolean
gst_rtp_h263_pay_gobfinder (GstRtpH263Pay * rtph263pay,
GstRtpH263PayBoundry * boundry)
{
guint8 *current;
guint range;
guint i;
current = boundry->end + 1;
range = (rtph263pay->data - current) + rtph263pay->available_data;
GST_DEBUG ("Searching for next GOB, data:%p, len:%u, payload_len:%p,"
" current:%p, range:%u", rtph263pay->data, rtph263pay->available_data,
boundry->end + 1, current, range);
/* If we are past the end, stop */
if (current >= rtph263pay->data + rtph263pay->available_data)
return FALSE;
for (i = 3; i < range - 3; i++) {
if ((current[i] == 0x0) &&
(current[i + 1] == 0x0) && (current[i + 2] >> 7 == 0x1)) {
GST_LOG ("GOB end found at: %p start: %p len: %u", current + i - 1,
boundry->end + 1, (guint) (current + i - boundry->end + 2));
gst_rtp_h263_pay_boundry_init (boundry, boundry->end + 1,
current + i - 1, 0, 0);
return TRUE;
}
}
GST_DEBUG ("Couldn't find any new GBSC in this frame, range:%u", range);
gst_rtp_h263_pay_boundry_init (boundry, boundry->end + 1,
(guint8 *) (rtph263pay->data + rtph263pay->available_data - 1), 0, 0);
return TRUE;
}
static GstRtpH263PayGob *
gst_rtp_h263_pay_gob_new (GstRtpH263PayBoundry * boundry, guint gobn)
{
GstRtpH263PayGob *gob;
gob = (GstRtpH263PayGob *) g_malloc0 (sizeof (GstRtpH263PayGob));
gob->start = boundry->start;
gob->end = boundry->end;
gob->length = boundry->end - boundry->start + 1;
gob->ebit = boundry->ebit;
gob->sbit = boundry->sbit;
gob->gobn = gobn;
gob->quant = 0;
gob->macroblocks = NULL;
gob->nmacroblocs = 0;
return gob;
}
static void
gst_rtp_h263_pay_gob_destroy (GstRtpH263PayGob * gob, guint ind)
{
if (!gob)
return;
if (gob->macroblocks) {
guint i;
for (i = 0; i < gob->nmacroblocs; i++) {
gst_rtp_h263_pay_mb_destroy (gob->macroblocks[i]);
}
g_free (gob->macroblocks);
}
g_free (gob);
}
/*
* decode MCBPC for I frames and return index in table or -1 if not found
*/
static gint
gst_rtp_h263_pay_decode_mcbpc_I (guint32 value)
{
gint i;
guint16 code;
code = value >> 16;
GST_DEBUG ("value:0x%08x, code:0x%04x", value, code);
for (i = 0; i < MCBPC_I_LEN; i++) {
if ((code & mcbpc_I[i][1]) == mcbpc_I[i][0]) {
return i;
}
}
GST_WARNING ("Couldn't find code, returning -1");
return -1;
}
/*
* decode MCBPC for P frames and return index in table or -1 if not found
*/
static gint
gst_rtp_h263_pay_decode_mcbpc_P (guint32 value)
{
gint i;
guint16 code;
code = value >> 16;
GST_DEBUG ("value:0x%08x, code:0x%04x", value, code);
for (i = 0; i < MCBPC_P_LEN; i++) {
if ((code & mcbpc_P[i][1]) == mcbpc_P[i][0]) {
return i;
}
}
GST_WARNING ("Couldn't find code, returning -1");
return -1;
}
/*
* decode CBPY and return index in table or -1 if not found
*/
static gint
gst_rtp_h263_pay_decode_cbpy (guint32 value, guint8 cbpy_table[16][7])
{
gint i;
guint8 code;
code = value >> 24;
GST_DEBUG ("value:0x%08x, code:0x%04x", value, code);
for (i = 0; i < CBPY_LEN; i++) {
if ((code & cbpy_table[i][1]) == cbpy_table[i][0]) {
return i;
}
}
GST_WARNING ("Couldn't find code, returning -1");
return -1;
}
/*
* decode MVD and return index in table or -1 if not found
*/
static gint
gst_rtp_h263_pay_decode_mvd (guint32 value)
{
gint i;
guint16 code;
code = value >> 16;
GST_DEBUG ("value:0x%08x, code:0x%04x", value, code);
for (i = 0; i < MVD_LEN; i++) {
if ((code & mvd[i][1]) == mvd[i][0]) {
return i;
}
}
GST_WARNING ("Couldn't find code, returning -1");
return -1;
}
/*
* decode TCOEF and return index in table or -1 if not found
*/
static gint
gst_rtp_h263_pay_decode_tcoef (guint32 value)
{
gint i;
guint16 code;
code = value >> 16;
GST_DEBUG ("value:0x%08x, code:0x%04x", value, code);
for (i = 0; i < TCOEF_LEN; i++) {
if ((code & tcoef[i][1]) == tcoef[i][0]) {
GST_LOG ("tcoef is %d", i);
return i;
}
}
GST_WARNING ("Couldn't find code, returning -1");
return -1;
}
/*
* the 32-bit register is like a window that we move right for "move_bits" to get the next v "data" h263 field
* "rest_bits" tells how many bits in the "data" byte address are still not used
*/
static gint
gst_rtp_h263_pay_move_window_right (GstRtpH263PayContext * context, guint n,
guint rest_bits, guint8 ** orig_data, guint8 ** data_end)
{
GST_DEBUG ("Moving window: 0x%08x from: %p for %d bits, rest_bits: %d",
context->window, context->win_end, n, rest_bits);
if (n == 0)
return rest_bits;
while (n != 0 || context->win_end == ((*data_end) + 1)) {
//guint8 a = *data;
if (rest_bits == 0) {
if (n > 8) {
context->window = (context->window << 8) | *context->win_end;
n -= 8;
} else {
context->window =
(context->window << n) | (*context->win_end >> (8 - n));
rest_bits = 8 - n;
if (rest_bits == 0)
context->win_end++;
break;
}
} else {
if (n > rest_bits) {
context->window =
(context->
window << rest_bits) | (*context->win_end & (((guint) pow (2.0,
(double) rest_bits)) - 1));
n -= rest_bits;
rest_bits = 0;
} else {
context->window =
(context->window << n) | ((*context->win_end & (((guint) pow (2.0,
(double) rest_bits)) - 1)) >> (rest_bits - n));
rest_bits -= n;
if (rest_bits == 0)
context->win_end++;
break;
}
}
context->win_end++;
}
*orig_data = context->win_end - 4;
GST_DEBUG
("Window moved to %p with value: 0x%08x and orig_data: %p rest_bits: %d",
context->win_end, context->window, *orig_data, rest_bits);
return rest_bits;
}
/*
* Find the start of the next MB (end of the current MB)
* returns the number of excess bits and stores the end of the MB in end
* data must be placed on first MB byte
*/
static GstRtpH263PayMB *
gst_rtp_h263_pay_B_mbfinder (GstRtpH263PayContext * context,
GstRtpH263PayGob * gob, GstRtpH263PayMB * macroblock, guint mba)
{
guint mb_type_index;
guint cbpy_type_index;
guint tcoef_type_index;
GstRtpH263PayMB *mac;
GstRtpH263PayBoundry boundry;
gst_rtp_h263_pay_boundry_init (&boundry, macroblock->end,
macroblock->end, 8 - macroblock->ebit, macroblock->ebit);
mac = gst_rtp_h263_pay_mb_new (&boundry, mba);
if (mac->sbit == 8) {
mac->start++;
// mac->end++;
mac->sbit = 0;
}
GST_LOG ("current_pos:%p, end:%p, rest_bits:%d, window:%x",
mac->start, mac->end, macroblock->ebit, context->window);
GST_LOG ("Current pos after COD: %p", mac->end);
if (context->piclayer->ptype_pictype == 0) {
//We have an I frame
gint i;
guint last;
guint ind;
//Step 2 decode MCBPC I
mb_type_index = gst_rtp_h263_pay_decode_mcbpc_I (context->window);
GST_DEBUG ("MCBPC index: %d", mb_type_index);
if (mb_type_index == -1) {
GST_ERROR ("MB index shouldn't be -1 in window: %08x", context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, mcbpc_I[mb_type_index][2],
mac->ebit, &mac->end, &gob->end);
mac->mb_type = mcbpc_I[mb_type_index][5];
if (mb_type_index == 8) {
GST_LOG ("Stuffing skipping rest of MB header");
return mac;
}
//Step 3 decode CBPY I
cbpy_type_index = gst_rtp_h263_pay_decode_cbpy (context->window, cbpy_I);
GST_DEBUG ("CBPY index: %d", cbpy_type_index);
if (cbpy_type_index == -1) {
GST_ERROR ("CBPY index shouldn't be -1 in window: %08x", context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, cbpy_I[cbpy_type_index][2],
mac->ebit, &mac->end, &gob->end);
//Step 4 decode rest of MB
//MB type 1 and 4 have DQUANT - we store it for packaging purposes
if (mcbpc_I[mb_type_index][5] == 4) {
GST_DEBUG ("Shifting DQUANT");
mac->quant = (context->window >> 30);
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 2, mac->ebit, &mac->end,
&gob->end);
}
//Step 5 go trough the blocks - decode DC and TCOEF
last = 0;
for (i = 0; i < N_BLOCKS; i++) {
GST_DEBUG ("Decoding INTRADC and TCOEF, i:%d", i);
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 8, mac->ebit, &mac->end,
&gob->end);
if (i > 3) {
ind = mcbpc_I[mb_type_index][i - 1];
} else {
ind = cbpy_I[cbpy_type_index][i + 3];
}
if (ind == 1) {
while (last == 0) {
tcoef_type_index = gst_rtp_h263_pay_decode_tcoef (context->window);
GST_DEBUG ("TCOEF index: %d", tcoef_type_index);
if (tcoef_type_index == -1) {
GST_ERROR ("TCOEF index shouldn't be -1 in window: %08x",
context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context,
tcoef[tcoef_type_index][2], mac->ebit, &mac->end, &gob->end);
last = tcoef[tcoef_type_index][3];
if (tcoef_type_index == 102) {
if ((context->window & 0x80000000) == 0x80000000)
last = 1;
else
last = 0;
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 15,
mac->ebit, &mac->end, &gob->end);
}
}
last = 0;
}
}
} else {
//We have a P frame
guint i;
guint last;
guint ind;
//Step 1 check COD
GST_DEBUG ("Checking for COD");
if ((context->window & 0x80000000) == 0x80000000) {
//The MB is not coded
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 1, mac->ebit, &mac->end,
&gob->end);
GST_DEBUG ("COOOOOOOOOOOD = 1");
return mac;
} else {
//The MB is coded
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 1, mac->ebit, &mac->end,
&gob->end);
}
//Step 2 decode MCBPC P
mb_type_index = gst_rtp_h263_pay_decode_mcbpc_P (context->window);
GST_DEBUG ("MCBPC index: %d", mb_type_index);
if (mb_type_index == -1) {
GST_ERROR ("MB index shouldn't be -1 in window: %08x", context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, mcbpc_P[mb_type_index][2],
mac->ebit, &mac->end, &gob->end);
mac->mb_type = mcbpc_P[mb_type_index][5];
if (mb_type_index == 20) {
GST_LOG ("Stuffing skipping rest of MB header");
return mac;
}
//Step 3 decode CBPY P
cbpy_type_index = gst_rtp_h263_pay_decode_cbpy (context->window, cbpy_P);
GST_DEBUG ("CBPY index: %d", cbpy_type_index);
if (cbpy_type_index == -1) {
GST_ERROR ("CBPY index shouldn't be -1 in window: %08x", context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, cbpy_P[cbpy_type_index][2],
mac->ebit, &mac->end, &gob->end);
//MB type 1 and 4 have DQUANT - we add it to MB object and jump over
if (mcbpc_P[mb_type_index][5] == 4 || mcbpc_P[mb_type_index][5] == 1) {
GST_DEBUG ("Shifting DQUANT");
mac->quant = context->window >> 30;
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 2, mac->ebit, &mac->end,
&gob->end);
}
//MB types < 3 have MVD1-4
if (mcbpc_P[mb_type_index][5] < 3) {
guint nmvd;
gint j;
nmvd = 2;
if (mcbpc_P[mb_type_index][5] == 2)
nmvd = 8;
for (j = 0; j < nmvd; j++) {
guint mvd_type;
mvd_type = gst_rtp_h263_pay_decode_mvd (context->window);
if (mvd_type == -1) {
GST_ERROR ("MVD1-4 index shouldn't be -1 in window: %08x",
context->window);
return NULL;
}
//set the MB mvd values
mac->mvd[j] = mvd[mvd_type][3];
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, mvd[mvd_type][2],
mac->ebit, &mac->end, &gob->end);
}
}
//Step 5 go trough the blocks - decode DC and TCOEF
last = 0;
for (i = 0; i < N_BLOCKS; i++) {
//if MB type 3 or 4 then INTRADC coef are present in blocks
if (mcbpc_P[mb_type_index][5] > 2) {
GST_DEBUG ("INTRADC coef: %d", i);
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 8, mac->ebit,
&mac->end, &gob->end);
} else {
GST_DEBUG ("INTRADC coef is not present");
}
//check if the block has TCOEF
if (i > 3) {
ind = mcbpc_P[mb_type_index][i - 1];
} else {
if (mcbpc_P[mb_type_index][5] > 2) {
ind = cbpy_I[cbpy_type_index][i + 3];
} else {
ind = cbpy_P[cbpy_type_index][i + 3];
}
}
if (ind == 1) {
while (last == 0) {
tcoef_type_index = gst_rtp_h263_pay_decode_tcoef (context->window);
GST_DEBUG ("TCOEF index: %d", tcoef_type_index);
if (tcoef_type_index == -1) {
GST_ERROR ("TCOEF index shouldn't be -1 in window: %08x",
context->window);
return NULL;
}
mac->ebit =
gst_rtp_h263_pay_move_window_right (context,
tcoef[tcoef_type_index][2], mac->ebit, &mac->end, &gob->end);
last = tcoef[tcoef_type_index][3];
if (tcoef_type_index == 102) {
if ((context->window & 0x80000000) == 0x80000000)
last = 1;
else
last = 0;
mac->ebit =
gst_rtp_h263_pay_move_window_right (context, 15,
mac->ebit, &mac->end, &gob->end);
}
}
last = 0;
}
}
}
mac->length = mac->end - mac->start + 1;
return mac;
}
static GstRtpH263PayMB *
gst_rtp_h263_pay_mb_new (GstRtpH263PayBoundry * boundry, guint mba)
{
GstRtpH263PayMB *mb;
gint i;
mb = (GstRtpH263PayMB *) g_malloc0 (sizeof (GstRtpH263PayMB));
mb->start = boundry->start;
mb->end = boundry->end;
mb->length = boundry->end - boundry->start + 1;
mb->sbit = boundry->sbit;
mb->ebit = boundry->ebit;
mb->mba = mba;
for (i = 0; i < 5; i++)
mb->mvd[i] = 0;
return mb;
}
static void
gst_rtp_h263_pay_mb_destroy (GstRtpH263PayMB * mb)
{
if (!mb)
return;
g_free (mb);
}
static GstFlowReturn
gst_rtp_h263_pay_push (GstRtpH263Pay * rtph263pay,
GstRtpH263PayContext * context, GstRtpH263PayPackage * package)
{
/*
* Splat the payload header values
*/
guint8 *header;
guint8 *payload;
GstFlowReturn ret;
header = gst_rtp_buffer_get_payload (package->outbuf);
payload = header + package->mode;
switch (package->mode) {
case GST_RTP_H263_PAYLOAD_HEADER_MODE_A:
GST_LOG ("Pushing A packet");
gst_rtp_h263_pay_splat_header_A (header, package, context->piclayer);
break;
case GST_RTP_H263_PAYLOAD_HEADER_MODE_B:
GST_LOG ("Pushing B packet");
gst_rtp_h263_pay_splat_header_B (header, package, context->piclayer);
break;
case GST_RTP_H263_PAYLOAD_HEADER_MODE_C:
//gst_rtp_h263_pay_splat_header_C(header, package, context->piclayer);
//break;
default:
return GST_FLOW_ERROR;
}
/*
* Copy the payload data in the buffer
*/
GST_DEBUG ("Copying memory");
memcpy (payload, (guint8 *) package->payload_start, package->payload_len);
/*
* timestamp the buffer
*/
GST_BUFFER_TIMESTAMP (package->outbuf) = rtph263pay->first_ts;
gst_rtp_buffer_set_marker (package->outbuf, package->marker);
if (package->marker)
GST_DEBUG ("Marker set!");
ret =
gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtph263pay),
package->outbuf);
GST_DEBUG ("Package pushed, returning");
gst_rtp_h263_pay_package_destroy (package);
return ret;
}
static GstFlowReturn
gst_rtp_h263_pay_A_fragment_push (GstRtpH263Pay * rtph263pay,
GstRtpH263PayContext * context, guint first, guint last)
{
GstRtpH263PayPackage *pack;
pack = gst_rtp_h263_pay_package_new_empty ();
pack->payload_start = context->gobs[first]->start;
pack->sbit = context->gobs[first]->sbit;
pack->ebit = context->gobs[last]->ebit;
pack->payload_len =
(context->gobs[last]->end - context->gobs[first]->start) + 1;
pack->marker = FALSE;
if (last == context->no_gobs - 1) {
pack->marker = TRUE;
}
pack->gobn = context->gobs[first]->gobn;
pack->mode = GST_RTP_H263_PAYLOAD_HEADER_MODE_A;
pack->outbuf =
gst_rtp_buffer_new_allocate (pack->payload_len + pack->mode, 0, 0);
GST_DEBUG ("Sending len:%d data to push function", pack->payload_len);
return gst_rtp_h263_pay_push (rtph263pay, context, pack);
}
static GstFlowReturn
gst_rtp_h263_pay_B_fragment_push (GstRtpH263Pay * rtph263pay,
GstRtpH263PayContext * context, GstRtpH263PayGob * gob, guint first,
guint last, GstRtpH263PayBoundry * boundry)
{
GstRtpH263PayPackage *pack;
guint mv;
pack = gst_rtp_h263_pay_package_new_empty ();
pack->payload_start = gob->macroblocks[first]->start;
pack->sbit = gob->macroblocks[first]->sbit;
if (first == 0) {
pack->payload_start = boundry->start;
pack->sbit = boundry->sbit;
pack->quant = gob->quant;
} else {
pack->quant = gob->macroblocks[first]->quant;
}
pack->payload_end = gob->macroblocks[last]->end;
pack->ebit = gob->macroblocks[last]->ebit;
pack->mba = gob->macroblocks[first]->mba;
pack->gobn = gob->gobn;
pack->mode = GST_RTP_H263_PAYLOAD_HEADER_MODE_B;
pack->nmvd = 0;
if (gob->macroblocks[first]->mb_type < 3) {
if (gob->macroblocks[first]->mb_type == 2)
pack->nmvd = 8;
else if (gob->macroblocks[first]->mb_type < 2)
pack->nmvd = 2;
for (mv = 0; mv < pack->nmvd; mv++)
pack->mvd[mv] = gob->macroblocks[first]->mvd[mv];
}
pack->marker = FALSE;
if (last == gob->nmacroblocs - 1) {
pack->ebit = 0;
}
if ((format_props[context->piclayer->ptype_srcformat][0] - 1 == gob->gobn)
&& (last == gob->nmacroblocs - 1)) {
pack->marker = TRUE;
}
pack->payload_len = pack->payload_end - pack->payload_start + 1;
pack->outbuf =
gst_rtp_buffer_new_allocate (pack->payload_len + pack->mode, 0, 0);
return gst_rtp_h263_pay_push (rtph263pay, context, pack);
}
static gboolean
gst_rtp_h263_pay_mode_B_fragment (GstRtpH263Pay * rtph263pay,
GstRtpH263PayContext * context, GstRtpH263PayGob * gob)
{
/*---------- MODE B MODE FRAGMENTATION ----------*/
GstRtpH263PayMB *mac;
guint max_payload_size;
GstRtpH263PayBoundry boundry;
guint mb;
//TODO remove m
GstRtpH263PayMB *m;
guint first = 0;
guint payload_len;
max_payload_size =
context->mtu - GST_RTP_H263_PAYLOAD_HEADER_MODE_B - GST_RTP_HEADER_LEN;
gst_rtp_h263_pay_boundry_init (&boundry, gob->start, gob->start, gob->sbit,
0);
gob->macroblocks =
(GstRtpH263PayMB **) g_malloc0 (sizeof (GstRtpH263PayMB *) *
format_props[context->piclayer->ptype_srcformat][1]);
GST_LOG ("GOB isn't PB frame, applying mode B");
//initializing window
context->win_end = boundry.end;
if (gst_rtp_h263_pay_move_window_right (context, 32, boundry.ebit,
&boundry.end, &gob->end) != 0) {
GST_ERROR
("The rest of the bits should be 0, exiting, because something bad happend");
gst_adapter_flush (rtph263pay->adapter, rtph263pay->available_data);
goto decode_error;
}
//The first GOB of a frame "has no" actual header - PICTURE header is his header
if (gob->gobn == 0) {
guint shift;
GST_LOG ("Initial GOB");
shift = 43;
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, shift, boundry.ebit,
&boundry.end, &gob->end);
//We need PQUANT for mode B packages - so we store it
gob->quant = context->window >> 27;
//if PCM == 1, then PSBI is present - header has 51 bits
//shift for PQUANT (5) and PCM (1) = 6 bits
shift = 6;
if (context->cpm == 1)
shift += 2;
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, shift, boundry.ebit,
&boundry.end, &gob->end);
GST_DEBUG ("window: 0x%08x", context->window);
//Shifting the PEI and PSPARE fields
while ((context->window & 0x80000000) == 0x80000000) {
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, 9,
boundry.ebit, &boundry.end, &gob->end);
GST_LOG ("window: 0x%x", context->window);
}
//shift the last PEI field
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, 1, boundry.ebit,
&boundry.end, &gob->end);
} else {
//skipping GOBs 24 header bits + 5 GQUANT
guint shift = 24;
GST_LOG ("INTER GOB");
//if CPM == 1, there are 2 more bits in the header - GSBI header is 31 bits long
if (context->cpm == 1)
shift += 2;
GST_LOG ("window: 0x%x", context->window);
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, shift,
boundry.ebit, &boundry.end, &gob->end);
//We need GQUANT for mode B packages - so we store it
gob->quant = context->window >> 27;
shift = 5;
boundry.ebit =
gst_rtp_h263_pay_move_window_right (context, shift,
boundry.ebit, &boundry.end, &gob->end);
GST_LOG ("window: 0x%x", context->window);
}
GST_DEBUG ("GQUANT IS: %08x", gob->quant);
// We are on MB layer
m = mac = gst_rtp_h263_pay_mb_new (&boundry, 0);
for (mb = 0; mb < format_props[context->piclayer->ptype_srcformat][1]; mb++) {
GST_DEBUG ("================ START MB %d =================", mb);
//Find next macroblock boundaries
if (!(mac = gst_rtp_h263_pay_B_mbfinder (context, gob, mac, mb))) {
GST_DEBUG ("Error decoding MB - sbit: %d", 8 - m->ebit);
GST_ERROR ("Error decoding in GOB");
goto decode_error;
}
//If mb_type == stuffing, don't increment the mb address
if (mac->mb_type == 10) {
mb--;
continue;
} else {
gob->nmacroblocs++;
}
gob->macroblocks[mb] = mac;
if (mac->end >= gob->end) {
GST_LOG ("No more MBs in this GOB");
if (!mac->ebit) {
mac->end--;
}
gob->end = mac->end;
break;
}
m = mac;
GST_DEBUG ("Found MB: mba: %d start: %p end: %p len: %d sbit: %d ebit: %d",
mac->mba, mac->start, mac->end, mac->length, mac->sbit, mac->ebit);
GST_DEBUG ("================ END MB %d =================", mb);
}
mb = 0;
first = 0;
payload_len = boundry.end - boundry.start + 1;
GST_DEBUG ("------------------------- NEW PACKAGE ----------------------");
while (mb < gob->nmacroblocs) {
if (payload_len + gob->macroblocks[mb]->length < max_payload_size) {
//FIXME: payload_len is not the real length -> ignoring sbit/ebit
payload_len += gob->macroblocks[mb]->length;
mb++;
} else {
//FIXME: we should include the last few bits of the GOB in the package - do we do that now?
//GST_DEBUG ("Pushing GOBS %d to %d because payload size is %d", first,
// first == mb - 1, payload_len);
if (gst_rtp_h263_pay_B_fragment_push (rtph263pay, context, gob, first,
mb - 1, &boundry)) {
GST_ERROR ("Oooops, there was an error sending");
return FALSE;
}
payload_len = 0;
first = mb;
GST_DEBUG
("------------------------- END PACKAGE ----------------------");
GST_DEBUG
("------------------------- NEW PACKAGE ----------------------");
}
}
/* Push rest */
GST_DEBUG ("Remainder first: %d, MB: %d", first, mb);
if (payload_len != 0) {
if (gst_rtp_h263_pay_B_fragment_push (rtph263pay, context, gob, first,
mb - 1, &boundry)) {
GST_ERROR ("Oooops, there was an error sending!");
return FALSE;
}
}
/*---------- END OF MODE B FRAGMENTATION ----------*/
return TRUE;
decode_error:
return FALSE;
}
static GstFlowReturn
gst_rtp_h263_send_entire_frame (GstRtpH263Pay * rtph263pay,
GstRtpH263PayContext * context)
{
GstRtpH263PayPackage *pack;
pack =
gst_rtp_h263_pay_package_new (rtph263pay->data,
rtph263pay->data + rtph263pay->available_data,
rtph263pay->available_data, 0, 0, NULL, TRUE);
pack->mode = GST_RTP_H263_PAYLOAD_HEADER_MODE_A;
GST_DEBUG ("Available data: %d", rtph263pay->available_data);
pack->outbuf =
gst_rtp_buffer_new_allocate (pack->payload_len +
GST_RTP_H263_PAYLOAD_HEADER_MODE_A, 0, 0);
return gst_rtp_h263_pay_push (rtph263pay, context, pack);
}
static GstFlowReturn
gst_rtp_h263_pay_flush (GstRtpH263Pay * rtph263pay)
{
/*
* FIXME: GSTUF bits are ignored right now,
* - not using EBIT/SBIT payload header fields in mode A fragmentation - ffmpeg doesn't need them, but others?
*/
GstFlowReturn ret;
GstRtpH263PayContext *context;
gint i;
ret = 0;
context = (GstRtpH263PayContext *) g_malloc0 (sizeof (GstRtpH263PayContext));
context->mtu =
rtph263pay->payload.mtu - (MTU_SECURITY_OFFSET + GST_RTP_HEADER_LEN +
GST_RTP_H263_PAYLOAD_HEADER_MODE_C);
GST_DEBUG ("MTU: %d", context->mtu);
rtph263pay->available_data = gst_adapter_available (rtph263pay->adapter);
if (rtph263pay->available_data == 0) {
ret = GST_FLOW_RESEND;
goto end;
}
/* Get a pointer to all the data for the frame */
rtph263pay->data =
(guint8 *) gst_adapter_peek (rtph263pay->adapter,
rtph263pay->available_data);
/* Picture header */
context->piclayer = (GstRtpH263PayPic *) rtph263pay->data;
if (context->piclayer->ptype_pictype == 0)
GST_DEBUG ("We got an I-frame");
else
GST_DEBUG ("We got a P-frame");
context->cpm = rtph263pay->data[6] >> 7;
GST_DEBUG ("CPM: %d", context->cpm);
GST_DEBUG ("Payload length is: %d", rtph263pay->available_data);
/*
* - MODE A - If normal, I and P frames, -> mode A
* - GOB layer fragmentation
* - MODE B - If normal, I and P frames, but GOBs > mtu
* - MB layer fragmentation
* - MODE C - For P frames with PB option, but GOBs > mtu
* - MB layer fragmentation
*/
if (rtph263pay->available_data + GST_RTP_H263_PAYLOAD_HEADER_MODE_A +
GST_RTP_HEADER_LEN < context->mtu) {
ret = gst_rtp_h263_send_entire_frame (rtph263pay, context);
} else {
/*---------- FRAGMENTING THE FRAME BECAUSE TOO LARGE TO FIT IN MTU ----------*/
GstRtpH263PayBoundry bound;
gint first;
guint payload_len;
gboolean forcea = FALSE;
GST_DEBUG ("Frame too large for MTU");
/*
* Let's go trough all the data and fragment it untill end is reached
*/
gst_rtp_h263_pay_boundry_init (&bound, NULL, rtph263pay->data - 1, 0, 0);
context->gobs =
(GstRtpH263PayGob **) g_malloc0 (format_props[context->
piclayer->ptype_srcformat][0] * sizeof (GstRtpH263PayGob *));
for (i = 0; i < format_props[context->piclayer->ptype_srcformat][0]; i++) {
GST_DEBUG ("Searching for gob %d", i);
if (!gst_rtp_h263_pay_gobfinder (rtph263pay, &bound)) {
if (i <= 1) {
GST_WARNING
("No GOB's were found in data stream! Please enable RTP mode in encoder. Forcing mode A for now.");
ret = gst_rtp_h263_send_entire_frame (rtph263pay, context);
goto end;
} else {
/* try to send fragments corresponding to found GOBs */
forcea = TRUE;
break;
}
}
context->gobs[i] = gst_rtp_h263_pay_gob_new (&bound, i);
//FIXME - encoders may generate an EOS gob that has to be processed
GST_DEBUG
("Gob values are: gobn: %d, start: %p len: %d ebit: %d sbit: %d", i,
context->gobs[i]->start, context->gobs[i]->length,
context->gobs[i]->ebit, context->gobs[i]->sbit);
}
/* NOTE some places may still assume this to be the max possible */
context->no_gobs = i;
GST_DEBUG ("Found %d GOBS of maximum %d",
context->no_gobs, format_props[context->piclayer->ptype_srcformat][0]);
// Make packages smaller than MTU
// A mode
// - if ( GOB > MTU) -> B mode || C mode
// Push packages
first = 0;
payload_len = 0;
i = 0;
while (i < context->no_gobs) {
if (context->gobs[i]->length >= context->mtu) {
if (payload_len == 0) {
GST_DEBUG ("GOB len > MTU");
if (rtph263pay->prop_payload_mode || forcea) {
payload_len = context->gobs[i]->length;
goto force_a;
}
if (!context->piclayer->ptype_pbmode) {
GST_DEBUG ("MODE B on GOB %d needed", i);
if (!gst_rtp_h263_pay_mode_B_fragment (rtph263pay, context,
context->gobs[i])) {
GST_ERROR ("There was an error fragmenting in mode B");
return GST_FLOW_ERROR;
}
} else {
//IMPLEMENT C mode
GST_ERROR ("MODE C on GOB %d needed, but not supported yet", i);
/*if(!gst_rtp_h263_pay_mode_C_fragment(rtph263pay, context, context->gobs[i])) {
ret = GST_FLOW_OK;
GST_ERROR("There was an error fragmenting in mode C");
goto decode_error;
} */
goto decode_error;
}
decode_error:
i++;
first = i;
continue;
} else {
goto payload_a_push;
}
}
if (payload_len + context->gobs[i]->length < context->mtu) {
GST_DEBUG ("GOB %d fills mtu", i);
payload_len += context->gobs[i]->length;
i++;
if (i == context->no_gobs) {
GST_DEBUG ("LAST GOB %d", i);
goto payload_a_push;
}
} else {
payload_a_push:
GST_DEBUG ("Pushing GOBS %d to %d because payload size is %d", first,
first == i ? i : i - 1, payload_len);
gst_rtp_h263_pay_A_fragment_push (rtph263pay, context, first,
first == i ? i : i - 1);
payload_len = 0;
first = i;
}
continue;
force_a:
GST_DEBUG ("Pushing GOBS %d to %d because payload size is %d", first, i,
payload_len);
gst_rtp_h263_pay_A_fragment_push (rtph263pay, context, first, i);
payload_len = 0;
i++;
first = i;
}
}/*---------- END OF FRAGMENTATION ----------*/
/* Flush the input buffer data */
end:
gst_rtp_h263_pay_context_destroy (context,
context->piclayer->ptype_srcformat);
gst_adapter_flush (rtph263pay->adapter, rtph263pay->available_data);
return ret;
}
static GstFlowReturn
gst_rtp_h263_pay_handle_buffer (GstBaseRTPPayload * payload, GstBuffer * buffer)
{
GstRtpH263Pay *rtph263pay;
GstFlowReturn ret;
GST_DEBUG ("-------------------- NEW FRAME ---------------");
rtph263pay = GST_RTP_H263_PAY (payload);
rtph263pay->first_ts = GST_BUFFER_TIMESTAMP (buffer);
/* we always encode and flush a full picture */
gst_adapter_push (rtph263pay->adapter, buffer);
ret = gst_rtp_h263_pay_flush (rtph263pay);
GST_DEBUG ("-------------------- END FRAME ---------------");
return ret;
}
gboolean
gst_rtp_h263_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtph263pay",
GST_RANK_NONE, GST_TYPE_RTP_H263_PAY);
}
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