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vdr-plugin-femon/femonreceiver.c
Rolf Ahrenberg 7ee255830a Updated for vdr-1.3.40. 
Fixed a translation bug (Thanks to Antti Hartikainen).
Fixed AC3 header parsing bug (Thanks to Axel Katzur for reporting this one).
Fixed EgalsTry theme (Thanks to Uwe Hanke).
2006-01-25 04:20:00 +02:00

367 lines
11 KiB
C
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/*
* Frontend Status Monitor plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id$
*/
#include <unistd.h>
#include "femontools.h"
#include "femoncfg.h"
#include "femonreceiver.h"
#define TS_SIZE 188
#define PAY_START 0x40
#define ADAPT_FIELD 0x20
#define PAYLOAD 0x10
#define PTS_DTS_FLAGS 0xC0
cFemonReceiver::cFemonReceiver(int Ca, int Vpid, int Apid[], int Dpid[])
:cReceiver(Ca, -1, Vpid, Apid, Dpid, NULL), cThread("femon receiver")
{
Dprintf("%s()\n", __PRETTY_FUNCTION__);
m_VideoPid = Vpid;
m_AudioPid = Apid[0];
m_AC3Pid = Dpid[0];
m_VideoValid = false;
m_VideoPacketCount = 0;
m_VideoHorizontalSize = 0;
m_VideoVerticalSize = 0;
m_VideoAspectRatio = AR_RESERVED;
m_VideoFormat = VF_UNKNOWN;
m_VideoFrameRate = 0.0;
m_VideoStreamBitrate = 0.0;
m_VideoBitrate = 0.0;
m_AudioValid = false;
m_AudioPacketCount = 0;
m_AudioStreamBitrate = -2.0;
m_AudioBitrate = 0.0;
m_AudioSamplingFreq = -1;
m_AudioMPEGLayer = 0;
m_AudioBitrate = 0.0;
m_AC3Valid = false;
m_AC3PacketCount = 0;
m_AC3StreamBitrate = 0;
m_AC3SamplingFreq = 0;
m_AC3Bitrate = 0;
m_AC3FrameSize = 0;
m_AC3BitStreamMode = FR_NOTVALID;
m_AC3AudioCodingMode = FR_NOTVALID;
m_AC3CenterMixLevel = FR_NOTVALID;
m_AC3SurroundMixLevel = FR_NOTVALID;
m_AC3DolbySurroundMode = FR_NOTVALID;
m_AC3LfeOn = false;
m_AC3DialogLevel = FR_NOTVALID;
}
cFemonReceiver::~cFemonReceiver(void)
{
Dprintf("%s()\n", __PRETTY_FUNCTION__);
if (Running())
Cancel(3);
}
/* The following function originates from libdvbmpeg: */
void cFemonReceiver::GetVideoInfo(uint8_t *mbuf, int count)
{
uint8_t *headr;
int found = 0;
int c = 0;
//m_VideoValid = false;
while ((found < 4) && ((c + 4) < count)) {
uint8_t *b;
b = mbuf + c;
if ((b[0] == 0x00) && (b[1] == 0x00) && (b[2] == 0x01) && (b[3] == 0xb3))
found = 4;
else
c++;
}
if ((!found) || ((c + 16) >= count)) return;
m_VideoValid = true;
headr = mbuf + c + 4;
m_VideoHorizontalSize = ((headr[1] & 0xF0) >> 4) | (headr[0] << 4);
m_VideoVerticalSize = ((headr[1] & 0x0F) << 8) | (headr[2]);
int sw = (int)((headr[3] & 0xF0) >> 4);
switch ( sw ){
case 1:
m_VideoAspectRatio = AR_1_1;
break;
case 2:
m_VideoAspectRatio = AR_4_3;
break;
case 3:
m_VideoAspectRatio = AR_16_9;
break;
case 4:
m_VideoAspectRatio = AR_2_21_1;
break;
case 5 ... 15:
default:
m_VideoAspectRatio = AR_RESERVED;
break;
}
sw = (int)(headr[3] & 0x0F);
switch ( sw ) {
case 1:
m_VideoFrameRate = 24000 / 1001.0;
m_VideoFormat = VF_UNKNOWN;
break;
case 2:
m_VideoFrameRate = 24.0;
m_VideoFormat = VF_UNKNOWN;
break;
case 3:
m_VideoFrameRate = 25.0;
m_VideoFormat = VF_PAL;
break;
case 4:
m_VideoFrameRate = 30000 / 1001.0;
m_VideoFormat = VF_NTSC;
break;
case 5:
m_VideoFrameRate = 30.0;
m_VideoFormat = VF_NTSC;
break;
case 6:
m_VideoFrameRate = 50.0;
m_VideoFormat = VF_PAL;
break;
case 7:
m_VideoFrameRate = 60.0;
m_VideoFormat = VF_NTSC;
break;
case 8:
m_VideoFrameRate = 60000 / 1001.0;
m_VideoFormat = VF_NTSC;
break;
case 9 ... 15:
default:
m_VideoFrameRate = 0;
m_VideoFormat = VF_UNKNOWN;
break;
}
m_VideoStreamBitrate = 400 * (((headr[4] << 10) & 0x0003FC00UL) | ((headr[5] << 2) & 0x000003FCUL) | (((headr[6] & 0xC0) >> 6) & 0x00000003UL)) / 1000000.0;
}
static unsigned int bitrates[3][16] =
{
{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0},
{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0},
{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0}
};
static unsigned int samplerates[4] =
{441, 480, 320, 0};
/* The following function originates from libdvbmpeg: */
void cFemonReceiver::GetAudioInfo(uint8_t *mbuf, int count)
{
uint8_t *headr;
int found = 0;
int c = 0;
int tmp = 0;
//m_AudioValid = false;
while (!found && (c < count)) {
uint8_t *b = mbuf + c;
if ((b[0] == 0xff) && ((b[1] & 0xf8) == 0xf8))
found = 1;
else
c++;
}
if ((!found) || ((c + 3) >= count)) return;
m_AudioValid = true;
headr = mbuf + c;
m_AudioMPEGLayer = 4 - ((headr[1] & 0x06) >> 1);
tmp = bitrates[(3 - ((headr[1] & 0x06) >> 1))][(headr[2] >> 4)] * 1000;
if (tmp == 0)
m_AudioStreamBitrate = (double)FR_FREE;
else if (tmp == 0xf)
m_AudioStreamBitrate = (double)FR_RESERVED;
else
m_AudioStreamBitrate = tmp / 1000.0;
tmp = samplerates[((headr[2] & 0x0c) >> 2)] * 100;
if (tmp == 3)
m_AudioSamplingFreq = FR_RESERVED;
else
m_AudioSamplingFreq = tmp;
}
static unsigned int ac3_bitrates[32] =
{32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 448, 512, 576, 640, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
static unsigned int ac3_freq[4] =
{480, 441, 320, 0};
static unsigned int ac3_frames[3][32] =
{
{64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 448, 512, 640, 768, 896, 1024, 1152, 1280, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{69, 87, 104, 121, 139, 174, 208, 243, 278, 348, 417, 487, 557, 696, 835, 975, 1114, 1253, 1393, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{96, 120, 144, 168, 192, 240, 288, 336, 384, 480, 576, 672, 768, 960, 1152, 1344, 1536, 1728, 1920, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
};
/*
** AC3 Audio Header: http://www.atsc.org/standards/a_52a.pdf
** The following function originates from libdvbmpeg:
*/
void cFemonReceiver::GetAC3Info(uint8_t *mbuf, int count)
{
uint8_t *headr;
int found = 0;
int c = 0;
uint8_t frame;
//m_AC3Valid = false;
while (!found && (c < count)) {
uint8_t *b = mbuf + c;
if ((b[0] == 0x0b) && (b[1] == 0x77))
found = 1;
else
c++;
}
if ((!found) || ((c + 5) >= count)) return;
m_AC3Valid = true;
headr = mbuf + c + 2;
frame = (headr[2] & 0x3f);
m_AC3StreamBitrate = ac3_bitrates[frame >> 1];
int fr = (headr[2] & 0xc0 ) >> 6;
m_AC3SamplingFreq = ac3_freq[fr] * 100;
m_AC3FrameSize = ac3_frames[fr][frame >> 1];
if ((frame & 1) && (fr == 1)) m_AC3FrameSize++;
m_AC3FrameSize <<= 1;
m_AC3BitStreamMode = (headr[3] & 7);
m_AC3AudioCodingMode = (headr[4] & 0xE0) >> 5;
if ((m_AC3AudioCodingMode & 0x01) && (m_AC3AudioCodingMode != 0x01)) {
// 3 front channels
m_AC3CenterMixLevel = (headr[4] & 0x18) >> 3;
if (m_AC3AudioCodingMode & 0x04) {
// a surround channel exists
m_AC3SurroundMixLevel = (headr[4] & 0x06) >> 1;
if (m_AC3AudioCodingMode == 0x02) {
// if in 2/0 mode
m_AC3DolbySurroundMode = ((headr[4] & 0x01) << 1) | ((headr[5] & 0x80) >> 7);
m_AC3LfeOn = (headr[5] & 0x40) >> 6;
m_AC3DialogLevel = (headr[5] & 0x3e) >> 1;
}
else {
m_AC3DolbySurroundMode = FR_NOTVALID;
m_AC3LfeOn = (headr[4] & 0x01);
m_AC3DialogLevel = (headr[5] & 0xF8) >> 3;
}
}
else {
m_AC3SurroundMixLevel = FR_NOTVALID;
if (m_AC3AudioCodingMode == 0x02) {
// if in 2/0 mode
m_AC3DolbySurroundMode = (headr[4] & 0x06) >> 1;
m_AC3LfeOn = (headr[4] & 0x01);
m_AC3DialogLevel = (headr[5] & 0xF8) >> 3;
}
else {
m_AC3DolbySurroundMode = FR_NOTVALID;
m_AC3LfeOn = (headr[4] & 0x04) >> 2;
m_AC3DialogLevel = (headr[4] & 0x03) << 3 | ((headr[5] & 0xE0) >> 5);
}
}
}
else {
m_AC3CenterMixLevel = FR_NOTVALID;
if (m_AC3AudioCodingMode & 0x04) {
// a surround channel exists
m_AC3SurroundMixLevel = (headr[4] & 0x18) >> 3;
if (m_AC3AudioCodingMode == 0x02) {
// if in 2/0 mode
m_AC3DolbySurroundMode = (headr[4] & 0x06) >> 1;
m_AC3LfeOn = (headr[4] & 0x01);
m_AC3DialogLevel = (headr[5] & 0xF8) >> 3;
}
else {
m_AC3DolbySurroundMode = FR_NOTVALID;
m_AC3LfeOn = (headr[4] & 0x04) >> 2;
m_AC3DialogLevel = (headr[4] & 0x03) << 3 | ((headr[5] & 0xE0) >> 5);
}
}
else {
m_AC3SurroundMixLevel = FR_NOTVALID;
if (m_AC3AudioCodingMode == 0x02) {
// if in 2/0 mode
m_AC3DolbySurroundMode = (headr[4] & 0x18) >> 3;
m_AC3LfeOn = (headr[4] & 0x04) >> 2;
m_AC3DialogLevel = (headr[4] & 0x03) << 3 | ((headr[5] & 0xE0) >> 5);
}
else {
m_AC3DolbySurroundMode = FR_NOTVALID;
m_AC3LfeOn = (headr[4] & 0x10) >> 4;
m_AC3DialogLevel = ((headr[4] & 0x0F) << 1) | ((headr[5] & 0x80) >> 7);
}
}
}
}
void cFemonReceiver::Activate(bool On)
{
Dprintf("%s(%d)\n", __PRETTY_FUNCTION__, On);
if (On)
Start();
else
Cancel();
}
void cFemonReceiver::Receive(uchar *Data, int Length)
{
// TS packet length: TS_SIZE
if (Length == TS_SIZE) {
int pid = ((Data[1] & 0x1f) << 8) | (Data[2]);
if (pid == m_VideoPid) {
m_VideoPacketCount++;
}
else if (pid == m_AudioPid) {
m_AudioPacketCount++;
}
else if (pid == m_AC3Pid) {
m_AC3PacketCount++;
}
/* the following originates from libdvbmpeg: */
if (!(Data[3] & PAYLOAD)) {
return;
}
uint8_t off = 0;
if (Data[3] & ADAPT_FIELD) {
off = Data[4] + 1;
}
if (Data[1] & PAY_START) {
uint8_t *sb = Data + 4 + off;
if (sb[7] & PTS_DTS_FLAGS) {
uint8_t *pay = sb + sb[8] + 9;
int l = TS_SIZE - 13 - off - sb[8];
if (pid == m_VideoPid) {
GetVideoInfo(pay, l);
}
else if (pid == m_AudioPid) {
GetAudioInfo(pay, l);
}
else if (pid == m_AC3Pid) {
GetAC3Info(pay, l);
}
}
}
/* end */
}
}
void cFemonReceiver::Action(void)
{
Dprintf("%s()\n", __PRETTY_FUNCTION__);
cTimeMs t;
while (Running()) {
t.Set(0);
// TS packet 188 bytes - 4 byte header; MPEG standard defines 1Mbit = 1000000bit
m_VideoBitrate = (8.0 * 184.0 * m_VideoPacketCount) / (femonConfig.calcinterval * 100000.0);
m_VideoPacketCount = 0;
m_AudioBitrate = (8.0 * 184.0 * m_AudioPacketCount) / (femonConfig.calcinterval * 100.0);
m_AudioPacketCount = 0;
m_AC3Bitrate = (8.0 * 184.0 * m_AC3PacketCount) / (femonConfig.calcinterval * 100.0);
m_AC3PacketCount = 0;
cCondWait::SleepMs(100 * femonConfig.calcinterval - t.Elapsed());
}
}
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