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softhddev.c
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///
/// @file softhddev.c @brief A software HD device plugin for VDR.
///
/// Copyright (c) 2011 - 2015 by Johns. All Rights Reserved.
///
/// Contributor(s):
///
/// License: AGPLv3
///
/// This program is free software: you can redistribute it and/or modify
/// it under the terms of the GNU Affero General Public License as
/// published by the Free Software Foundation, either version 3 of the
/// License.
///
/// 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 Affero General Public License for more details.
///
/// $Id$
//////////////////////////////////////////////////////////////////////////////
#define noUSE_SOFTLIMIT ///< add soft buffer limits to Play..
#define noUSE_PIP ///< include PIP support + new API
#define noDUMP_TRICKSPEED ///< dump raw trickspeed packets
#include <sys/types.h>
#include <sys/stat.h>
#ifdef __FreeBSD__
#include <signal.h>
#endif
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <libintl.h>
#define _(str) gettext(str) ///< gettext shortcut
#define _N(str) str ///< gettext_noop shortcut
#include <libavcodec/avcodec.h>
#ifdef USE_AVFILTER
#include <libavfilter/avfilter.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#endif
#include <libavutil/mem.h>
// support old ffmpeg versions <1.0
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,18,102)
#define AVCodecID CodecID
#define AV_CODEC_ID_AAC CODEC_ID_AAC
#define AV_CODEC_ID_AAC_LATM CODEC_ID_AAC_LATM
#define AV_CODEC_ID_AC3 CODEC_ID_AC3
#define AV_CODEC_ID_DTS CODEC_ID_DTS
#define AV_CODEC_ID_EAC3 CODEC_ID_EAC3
#define AV_CODEC_ID_H264 CODEC_ID_H264
#define AV_CODEC_ID_MP2 CODEC_ID_MP2
#define AV_CODEC_ID_MPEG2VIDEO CODEC_ID_MPEG2VIDEO
#define AV_CODEC_ID_NONE CODEC_ID_NONE
#define AV_CODEC_ID_PCM_DVD CODEC_ID_PCM_DVD
#endif
#ifndef __USE_GNU
#define __USE_GNU
#endif
#include <pthread.h>
#include "iatomic.h" // portable atomic_t
#include "misc.h"
#include "softhddev.h"
#include "audio.h"
#include "video.h"
#include "codec.h"
#ifdef noDEBUG
static int DumpH264(const uint8_t * data, int size);
static void DumpMpeg(const uint8_t * data, int size);
#endif
//////////////////////////////////////////////////////////////////////////////
// Variables
//////////////////////////////////////////////////////////////////////////////
extern int ConfigAudioBufferTime; ///< config size ms of audio buffer
extern int DisableOglOsd; ///< disable OpenGL OSD
extern char ConfigVideoClearOnSwitch; ///< clear decoder on channel switch
extern volatile char AudioStarted;
char ConfigStartX11Server; ///< flag start the x11 server
static signed char ConfigStartSuspended; ///< flag to start in suspend mode
static char ConfigFullscreen; ///< fullscreen modus
extern char VideoFullscreen; ///< fullscreen state
static const char *X11ServerArguments; ///< default command arguments
static enum VideoHardwareDecoderMode ConfigStillDecoder; ///< hw/sw decoder for still picture
static pthread_mutex_t SuspendLockMutex; ///< suspend lock mutex
static volatile char StreamFreezed; ///< stream freezed
extern int SysLogLevel; ///< VDR's global log level
int LogLevel = 0; ///< our local log level
//////////////////////////////////////////////////////////////////////////////
// Audio
//////////////////////////////////////////////////////////////////////////////
volatile char NewAudioStream; ///< new audio stream
static volatile char SkipAudio; ///< skip audio stream
static AudioDecoder *MyAudioDecoder; ///< audio decoder
static enum AVCodecID AudioCodecID; ///< current codec id
static int AudioChannelID; ///< current audio channel id
static VideoStream *AudioSyncStream; ///< video stream for audio/video sync
/// Minimum free space in audio buffer 8 packets for 8 channels
#define AUDIO_MIN_BUFFER_FREE (3072 * 8 * 8)
#define AUDIO_BUFFER_SIZE (512 * 1024) ///< audio PES buffer default size
static AVPacket AudioAvPkt[1]; ///< audio a/v packet
//////////////////////////////////////////////////////////////////////////////
// Audio codec parser
//////////////////////////////////////////////////////////////////////////////
///
/// Mpeg bitrate table.
///
/// BitRateTable[Version][Layer][Index]
///
static const uint16_t BitRateTable[2][4][16] = {
// MPEG Version 1
{{},
{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}},
// MPEG Version 2 & 2.5
{{},
{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0}
}
};
///
/// Mpeg samperate table.
///
static const uint16_t SampleRateTable[4] = {
44100, 48000, 32000, 0
};
///
/// Fast check for Mpeg audio.
///
/// 4 bytes 0xFFExxxxx Mpeg audio
///
static inline int FastMpegCheck(const uint8_t * p)
{
if (p[0] != 0xFF) { // 11bit frame sync
return 0;
}
if ((p[1] & 0xE0) != 0xE0) {
return 0;
}
if ((p[1] & 0x18) == 0x08) { // version ID - 01 reserved
return 0;
}
if (!(p[1] & 0x06)) { // layer description - 00 reserved
return 0;
}
if ((p[2] & 0xF0) == 0xF0) { // bitrate index - 1111 reserved
return 0;
}
if ((p[2] & 0x0C) == 0x0C) { // sampling rate index - 11 reserved
return 0;
}
return 1;
}
///
/// Check for Mpeg audio.
///
/// 0xFFEx already checked.
///
/// @param data incomplete PES packet
/// @param size number of bytes
///
/// @retval <0 possible mpeg audio, but need more data
/// @retval 0 no valid mpeg audio
/// @retval >0 valid mpeg audio
///
/// From: http://www.mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm
///
/// AAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM
///
/// o a 11x Frame sync
/// o b 2x Mpeg audio version (2.5, reserved, 2, 1)
/// o c 2x Layer (reserved, III, II, I)
/// o e 2x BitRate index
/// o f 2x SampleRate index (4100, 48000, 32000, 0)
/// o g 1x Paddding bit
/// o .. Doesn't care
///
/// frame length:
/// Layer I:
/// FrameLengthInBytes = (12 * BitRate / SampleRate + Padding) * 4
/// Layer II & III:
/// FrameLengthInBytes = 144 * BitRate / SampleRate + Padding
///
static int MpegCheck(const uint8_t * data, int size)
{
int mpeg2;
int mpeg25;
int layer;
int bit_rate_index;
int sample_rate_index;
int padding;
int bit_rate;
int sample_rate;
int frame_size;
mpeg2 = !(data[1] & 0x08) && (data[1] & 0x10);
mpeg25 = !(data[1] & 0x08) && !(data[1] & 0x10);
layer = 4 - ((data[1] >> 1) & 0x03);
bit_rate_index = (data[2] >> 4) & 0x0F;
sample_rate_index = (data[2] >> 2) & 0x03;
padding = (data[2] >> 1) & 0x01;
sample_rate = SampleRateTable[sample_rate_index];
if (!sample_rate) { // no valid sample rate try next
// moved into fast check
abort();
return 0;
}
sample_rate >>= mpeg2; // mpeg 2 half rate
sample_rate >>= mpeg25; // mpeg 2.5 quarter rate
bit_rate = BitRateTable[mpeg2 | mpeg25][layer][bit_rate_index];
if (!bit_rate) { // no valid bit-rate try next
// FIXME: move into fast check?
return 0;
}
bit_rate *= 1000;
switch (layer) {
case 1:
frame_size = (12 * bit_rate) / sample_rate;
frame_size = (frame_size + padding) * 4;
break;
case 2:
case 3:
default:
frame_size = (144 * bit_rate) / sample_rate;
frame_size = frame_size + padding;
break;
}
if (0) {
Debug(3,
"pesdemux: mpeg%s layer%d bitrate=%d samplerate=%d %d bytes\n",
mpeg25 ? "2.5" : mpeg2 ? "2" : "1", layer, bit_rate, sample_rate,
frame_size);
}
if (frame_size + 4 > size) {
return -frame_size - 4;
}
// check if after this frame a new mpeg frame starts
if (FastMpegCheck(data + frame_size)) {
return frame_size;
}
return 0;
}
///
/// Fast check for AAC LATM audio.
///
/// 3 bytes 0x56Exxx AAC LATM audio
///
static inline int FastLatmCheck(const uint8_t * p)
{
if (p[0] != 0x56) { // 11bit sync
return 0;
}
if ((p[1] & 0xE0) != 0xE0) {
return 0;
}
return 1;
}
///
/// Check for AAC LATM audio.
///
/// 0x56Exxx already checked.
///
/// @param data incomplete PES packet
/// @param size number of bytes
///
/// @retval <0 possible AAC LATM audio, but need more data
/// @retval 0 no valid AAC LATM audio
/// @retval >0 valid AAC LATM audio
///
static int LatmCheck(const uint8_t * data, int size)
{
int frame_size;
// 13 bit frame size without header
frame_size = ((data[1] & 0x1F) << 8) + data[2];
frame_size += 3;
if (frame_size + 2 > size) {
return -frame_size - 2;
}
// check if after this frame a new AAC LATM frame starts
if (FastLatmCheck(data + frame_size)) {
return frame_size;
}
return 0;
}
///
/// Possible AC-3 frame sizes.
///
/// from ATSC A/52 table 5.18 frame size code table.
///
const uint16_t Ac3FrameSizeTable[38][3] = {
{64, 69, 96}, {64, 70, 96}, {80, 87, 120}, {80, 88, 120},
{96, 104, 144}, {96, 105, 144}, {112, 121, 168}, {112, 122, 168},
{128, 139, 192}, {128, 140, 192}, {160, 174, 240}, {160, 175, 240},
{192, 208, 288}, {192, 209, 288}, {224, 243, 336}, {224, 244, 336},
{256, 278, 384}, {256, 279, 384}, {320, 348, 480}, {320, 349, 480},
{384, 417, 576}, {384, 418, 576}, {448, 487, 672}, {448, 488, 672},
{512, 557, 768}, {512, 558, 768}, {640, 696, 960}, {640, 697, 960},
{768, 835, 1152}, {768, 836, 1152}, {896, 975, 1344}, {896, 976, 1344},
{1024, 1114, 1536}, {1024, 1115, 1536}, {1152, 1253, 1728},
{1152, 1254, 1728}, {1280, 1393, 1920}, {1280, 1394, 1920},
};
///
/// Fast check for (E-)AC-3 audio.
///
/// 5 bytes 0x0B77xxxxxx AC-3 audio
///
static inline int FastAc3Check(const uint8_t * p)
{
if (p[0] != 0x0B) { // 16bit sync
return 0;
}
if (p[1] != 0x77) {
return 0;
}
return 1;
}
///
/// Check for (E-)AC-3 audio.
///
/// 0x0B77xxxxxx already checked.
///
/// @param data incomplete PES packet
/// @param size number of bytes
///
/// @retval <0 possible AC-3 audio, but need more data
/// @retval 0 no valid AC-3 audio
/// @retval >0 valid AC-3 audio
///
/// o AC-3 Header
/// AAAAAAAA AAAAAAAA BBBBBBBB BBBBBBBB CCDDDDDD EEEEEFFF
///
/// o a 16x Frame sync, always 0x0B77
/// o b 16x CRC 16
/// o c 2x Samplerate
/// o d 6x Framesize code
/// o e 5x Bitstream ID
/// o f 3x Bitstream mode
///
/// o E-AC-3 Header
/// AAAAAAAA AAAAAAAA BBCCCDDD DDDDDDDD EEFFGGGH IIIII...
///
/// o a 16x Frame sync, always 0x0B77
/// o b 2x Frame type
/// o c 3x Sub stream ID
/// o d 10x Framesize - 1 in words
/// o e 2x Framesize code
/// o f 2x Framesize code 2
///
static int Ac3Check(const uint8_t * data, int size)
{
int frame_size;
if (size < 5) { // need 5 bytes to see if AC-3/E-AC-3
return -5;
}
if (data[5] > (10 << 3)) { // E-AC-3
if ((data[4] & 0xF0) == 0xF0) { // invalid fscod fscod2
return 0;
}
frame_size = ((data[2] & 0x07) << 8) + data[3] + 1;
frame_size *= 2;
} else { // AC-3
int fscod;
int frmsizcod;
// crc1 crc1 fscod|frmsizcod
fscod = data[4] >> 6;
if (fscod == 0x03) { // invalid sample rate
return 0;
}
frmsizcod = data[4] & 0x3F;
if (frmsizcod > 37) { // invalid frame size
return 0;
}
// invalid is checked above
frame_size = Ac3FrameSizeTable[frmsizcod][fscod] * 2;
}
if (frame_size + 5 > size) {
return -frame_size - 5;
}
// FIXME: relaxed checks if codec is already detected
// check if after this frame a new AC-3 frame starts
if (FastAc3Check(data + frame_size)) {
return frame_size;
}
return 0;
}
///
/// Fast check for DTS audio.
///
/// 4 bytes 0x7FFE8001 DTS audio
///
static inline int FastDtsCheck(const uint8_t * p)
{
if (p[0] != 0x7F) {
return 0;
}
if (p[1] != 0xFE) {
return 0;
}
if (p[2] != 0x80) {
return 0;
}
if (p[3] != 0x01) {
return 0;
}
return 1;
}
///
/// Check for DTS audio.
///
/// 0x7FFE8001 already checked.
///
/// @param data incomplete PES packet
/// @param size number of bytes
///
static int DtsCheck(const uint8_t * data, int size)
{
int frame_size;
if (size < 8) { // need 8 bytes
return -8;
}
frame_size =
(((data[5] & 0x03) << 12) |
((data[6] & 0xff) << 4) |
((data[7] & 0xf0) >> 4)) + 1;
if(frame_size < 80 || frame_size > 8191) // invalid frame size
return 0;
if (frame_size + 4 > size) {
return -frame_size - 4;
}
// FIXME: relaxed checks if codec is already detected
// check if after this frame a new DTS frame starts
if (FastDtsCheck(data + frame_size)) {
return frame_size;
}
return 0;
}
///
/// Fast check for ADTS Audio Data Transport Stream.
///
/// 7/9 bytes 0xFFFxxxxxxxxxxx(xxxx) ADTS audio
///
static inline int FastAdtsCheck(const uint8_t * p)
{
if (p[0] != 0xFF) { // 12bit sync
return 0;
}
if ((p[1] & 0xF6) != 0xF0) { // sync + layer must be 0
return 0;
}
if ((p[2] & 0x3C) == 0x3C) { // sampling frequency index != 15
return 0;
}
return 1;
}
///
/// Check for ADTS Audio Data Transport Stream.
///
/// 0xFFF already checked.
///
/// @param data incomplete PES packet
/// @param size number of bytes
///
/// @retval <0 possible ADTS audio, but need more data
/// @retval 0 no valid ADTS audio
/// @retval >0 valid AC-3 audio
///
/// AAAAAAAA AAAABCCD EEFFFFGH HHIJKLMM MMMMMMMM MMMOOOOO OOOOOOPP
/// (QQQQQQQQ QQQQQQQ)
///
/// o A*12 syncword 0xFFF
/// o B*1 MPEG Version: 0 for MPEG-4, 1 for MPEG-2
/// o C*2 layer: always 0
/// o ..
/// o F*4 sampling frequency index (15 is invalid)
/// o ..
/// o M*13 frame length
///
static int AdtsCheck(const uint8_t * data, int size)
{
int frame_size;
if (size < 6) {
return -6;
}
frame_size = (data[3] & 0x03) << 11;
frame_size |= (data[4] & 0xFF) << 3;
frame_size |= (data[5] & 0xE0) >> 5;
if (frame_size + 3 > size) {
return -frame_size - 3;
}
// check if after this frame a new ADTS frame starts
if (FastAdtsCheck(data + frame_size)) {
return frame_size;
}
return 0;
}
/**
** Set volume of audio device.
**
** @param volume VDR volume (0 .. 255)
*/
void SetVolumeDevice(int volume)
{
AudioSetVolume((volume * 1000) / 255);
}
/**
*** Resets channel ID (restarts audio).
**/
void ResetChannelId(void)
{
AudioChannelID = -1;
Debug(3, "audio/demux: reset channel id\n");
}
//////////////////////////////////////////////////////////////////////////////
// Video
//////////////////////////////////////////////////////////////////////////////
#define VIDEO_BUFFER_SIZE (512 * 1024 * 2) ///< video PES buffer default size
#define VIDEO_PACKET_MAX 192 ///< max number of video packets
/**
** Video output stream device structure. Parser, decoder, display.
*/
struct __video_stream__
{
char isPipStream;
VideoHwDecoder *HwDecoder; ///< video hardware decoder
VideoDecoder *Decoder; ///< video decoder
pthread_mutex_t DecoderLockMutex; ///< video decoder lock mutex
enum AVCodecID CodecID; ///< current codec id
enum AVCodecID LastCodecID; ///< last codec id
volatile char NewStream; ///< flag new video stream
volatile char ClosingStream; ///< flag closing video stream
volatile char SkipStream; ///< skip video stream
volatile char Freezed; ///< stream freezed
volatile char TrickSpeed; ///< current trick speed
volatile char Close; ///< command close video stream
volatile char ClearBuffers; ///< command clear video buffers
volatile char ClearClose; ///< clear video buffers for close
int InvalidPesCounter; ///< counter of invalid PES packets
enum AVCodecID CodecIDRb[VIDEO_PACKET_MAX]; ///< codec ids in ring buffer
AVPacket PacketRb[VIDEO_PACKET_MAX]; ///< PES packet ring buffer
int StartCodeState; ///< last three bytes start code state
int PacketWrite; ///< ring buffer write pointer
int PacketRead; ///< ring buffer read pointer
atomic_t PacketsFilled; ///< how many of the ring buffer is used
};
static VideoStream MyVideoStream[1]; ///< normal video stream
#ifdef USE_PIP
static VideoStream PipVideoStream[1]; ///< pip video stream
#endif
#ifdef DEBUG
uint32_t VideoSwitch; ///< debug video switch ticks
static int VideoMaxPacketSize; ///< biggest used packet buffer
#endif
#ifdef STILL_DEBUG
static char InStillPicture; ///< flag still picture
#endif
const char *X11DisplayName; ///< x11 display name
static volatile char Usr1Signal; ///< true got usr1 signal
//////////////////////////////////////////////////////////////////////////////
/**
** Initialize video packet ringbuffer.
**
** @param stream video stream
*/
static void VideoPacketInit(VideoStream * stream)
{
int i;
for (i = 0; i < VIDEO_PACKET_MAX; ++i) {
AVPacket *avpkt;
avpkt = &stream->PacketRb[i];
// build a clean ffmpeg av packet
if (av_new_packet(avpkt, VIDEO_BUFFER_SIZE)) {
Fatal(_("[softhddev] out of memory\n"));
}
}
atomic_set(&stream->PacketsFilled, 0);
stream->PacketRead = stream->PacketWrite = 0;
}
/**
** Cleanup video packet ringbuffer.
**
** @param stream video stream
*/
static void VideoPacketExit(VideoStream * stream)
{
int i;
atomic_set(&stream->PacketsFilled, 0);
for (i = 0; i < VIDEO_PACKET_MAX; ++i) {
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(56,28,1)
av_free_packet(&stream->PacketRb[i]);
#else
av_packet_unref(&stream->PacketRb[i]);
#endif
}
}
/**
** Place video data in packet ringbuffer.
**
** @param stream video stream
** @param pts presentation timestamp of pes packet
** @param data data of pes packet
** @param size size of pes packet
*/
static void VideoEnqueue(VideoStream * stream, int64_t pts, const void *data,
int size)
{
AVPacket *avpkt;
// Debug(3, "video: enqueue %d\n", size);
avpkt = &stream->PacketRb[stream->PacketWrite];
if (!avpkt->stream_index) { // add pts only for first added
avpkt->pts = pts;
}
if (avpkt->stream_index + size >= avpkt->size) {
Debug(4,"video: packet %d buffer too small for %d\n", stream->PacketWrite,
avpkt->stream_index + size);
// new + grow reserves FF_INPUT_BUFFER_PADDING_SIZE
if (av_grow_packet(avpkt, ((size + VIDEO_BUFFER_SIZE / 2)
/ (VIDEO_BUFFER_SIZE / 2)) * (VIDEO_BUFFER_SIZE / 2))) {
avpkt->stream_index = 0;
return;
}
#ifdef DEBUG
if (avpkt->size <= avpkt->stream_index + size) {
fprintf(stderr, "%d %d %d\n", avpkt->size, avpkt->stream_index,
size);
fflush(stderr);
abort();
}
#endif
}
memcpy(avpkt->data + avpkt->stream_index, data, size);
avpkt->stream_index += size;
#ifdef DEBUG
if (avpkt->stream_index > VideoMaxPacketSize) {
VideoMaxPacketSize = avpkt->stream_index;
Debug(4, "video: max used PES packet size: %d\n", VideoMaxPacketSize);
}
#endif
}
/**
** Reset current packet.
**
** @param stream video stream
*/
static void VideoResetPacket(VideoStream * stream)
{
AVPacket *avpkt;
stream->StartCodeState = 0; // reset start code state
stream->CodecIDRb[stream->PacketWrite] = AV_CODEC_ID_NONE;
avpkt = &stream->PacketRb[stream->PacketWrite];
avpkt->stream_index = 0;
avpkt->pts = AV_NOPTS_VALUE;
avpkt->dts = AV_NOPTS_VALUE;
}
/**
** Finish current packet advance to next.
**
** @param stream video stream
** @param codec_id codec id of packet (MPEG/H264)
*/
static void VideoNextPacket(VideoStream * stream, int codec_id)
{
AVPacket *avpkt;
avpkt = &stream->PacketRb[stream->PacketWrite];
if (!avpkt->stream_index) { // ignore empty packets
if (codec_id != AV_CODEC_ID_NONE) {
return;
}
Debug(3, "video: possible stream change loss\n");
}
if (atomic_read(&stream->PacketsFilled) >= VIDEO_PACKET_MAX - 1) {
// no free slot available drop last packet
Error(_("video: no empty slot in packet ringbuffer\n"));
avpkt->stream_index = 0;
if (codec_id == AV_CODEC_ID_NONE) {
Debug(3, "video: possible stream change loss\n");
}
return;
}
// clear area for decoder, always enough space allocated
memset(avpkt->data + avpkt->stream_index, 0, FF_INPUT_BUFFER_PADDING_SIZE);
stream->CodecIDRb[stream->PacketWrite] = codec_id;
//DumpH264(avpkt->data, avpkt->stream_index);
// advance packet write
stream->PacketWrite = (stream->PacketWrite + 1) % VIDEO_PACKET_MAX;
atomic_inc(&stream->PacketsFilled);
VideoDisplayWakeup();
// intialize next package to use
VideoResetPacket(stream);
}
#ifdef USE_PIP
/**
** Place mpeg video data in packet ringbuffer.
**
** Some tv-stations sends mulitple pictures in a single PES packet.
** Split the packet into single picture packets.
** Nick/CC, Viva, MediaShop, Deutsches Music Fernsehen
**
** FIXME: this code can be written much faster
**
** @param stream video stream
** @param pts presentation timestamp of pes packet
** @param data data of pes packet
** @param size size of pes packet
*/
static void VideoMpegEnqueue(VideoStream * stream, int64_t pts,
const uint8_t * data, int size)
{
static const char startcode[3] = { 0x00, 0x00, 0x01 };
const uint8_t *p;
int n;
int first;
// first scan
first = !stream->PacketRb[stream->PacketWrite].stream_index;
p = data;
n = size;
#ifdef DEBUG
if (n < 4) {
// is a problem with the pes start code detection
Error(_("[softhddev] too short PES video packet\n"));
fprintf(stderr, "[softhddev] too short PES video packet\n");
}
#endif
switch (stream->StartCodeState) { // prefix starting in last packet
case 3: // 0x00 0x00 0x01 seen
#ifdef DEBUG
fprintf(stderr, "last: %d\n", stream->StartCodeState);
#endif
if (!p[0] || p[0] == 0xb3) {
#ifdef DEBUG
fprintf(stderr, "last: %d start\n", stream->StartCodeState);
#endif
stream->PacketRb[stream->PacketWrite].stream_index -= 3;
VideoNextPacket(stream, AV_CODEC_ID_MPEG2VIDEO);
VideoEnqueue(stream, pts, startcode, 3);
first = p[0] == 0xb3;
p++;
n--;
pts = AV_NOPTS_VALUE;
}
break;
case 2: // 0x00 0x00 seen
#ifdef DEBUG
fprintf(stderr, "last: %d\n", stream->StartCodeState);
#endif
if (p[0] == 0x01 && (!p[1] || p[1] == 0xb3)) {
#ifdef DEBUG
fprintf(stderr, "last: %d start\n", stream->StartCodeState);
#endif
stream->PacketRb[stream->PacketWrite].stream_index -= 2;
VideoNextPacket(stream, AV_CODEC_ID_MPEG2VIDEO);
VideoEnqueue(stream, pts, startcode, 2);
first = p[1] == 0xb3;
p += 2;
n -= 2;
pts = AV_NOPTS_VALUE;
}
break;
case 1: // 0x00 seen
#ifdef DEBUG
fprintf(stderr, "last: %d\n", stream->StartCodeState);
#endif
if (!p[0] && p[1] == 0x01 && (!p[2] || p[2] == 0xb3)) {
#ifdef DEBUG
fprintf(stderr, "last: %d start\n", stream->StartCodeState);
#endif
stream->PacketRb[stream->PacketWrite].stream_index -= 1;
VideoNextPacket(stream, AV_CODEC_ID_MPEG2VIDEO);
VideoEnqueue(stream, pts, startcode, 1);
first = p[2] == 0xb3;
p += 3;
n -= 3;
pts = AV_NOPTS_VALUE;
}
case 0:
break;
}
// b3 b4 b8 00 b5 ... 00 b5 ...
while (n > 3) {
if (0 && !p[0] && !p[1] && p[2] == 0x01) {
fprintf(stderr, " %02x", p[3]);
}
// scan for picture header 0x00000100
// FIXME: not perfect, must split at 0xb3 also
if (!p[0] && !p[1] && p[2] == 0x01 && !p[3]) {
if (first) {
first = 0;
n -= 4;
p += 4;
continue;
}
// packet has already an picture header
/*
fprintf(stderr, "\nfix:%9d,%02x%02x%02x %02x ", n,
p[0], p[1], p[2], p[3]);
*/
// first packet goes only upto picture header
VideoEnqueue(stream, pts, data, p - data);
VideoNextPacket(stream, AV_CODEC_ID_MPEG2VIDEO);
#ifdef DEBUG
fprintf(stderr, "fix\r");
#endif
data = p;
size = n;
// time-stamp only valid for first packet
pts = AV_NOPTS_VALUE;
n -= 4;
p += 4;
continue;
}
--n;
++p;
}
stream->StartCodeState = 0;
switch (n) { // handle packet border start code
case 3:
if (!p[0] && !p[1] && p[2] == 0x01) {
stream->StartCodeState = 3;
}
break;
case 2:
if (!p[0] && !p[1]) {
stream->StartCodeState = 2;
}
break;
case 1:
if (!p[0]) {
stream->StartCodeState = 1;
}
break;
case 0:
break;
}
VideoEnqueue(stream, pts, data, size);
}
#else
/**
** Fix packet for FFMpeg.
**
** Some tv-stations sends mulitple pictures in a single PES packet.
** Current ffmpeg 0.10 and libav-0.8 has problems with this.
** Split the packet into single picture packets.
**
** FIXME: there are stations which have multiple pictures and
** the last picture incomplete in the PES packet.
**
** FIXME: move function call into PlayVideo, than the hardware
** decoder didn't need to support multiple frames decoding.
**
** @param avpkt ffmpeg a/v packet
*/
static void FixPacketForFFMpeg(VideoDecoder * vdecoder, AVPacket * avpkt)
{
uint8_t *p;
int n;
AVPacket tmp[1];
int first;
p = avpkt->data;
n = avpkt->size;
*tmp = *avpkt;
first = 1;
#if STILL_DEBUG>1
if (InStillPicture) {
fprintf(stderr, "fix(%d): ", n);
}
#endif
while (n > 3) {
#if STILL_DEBUG>1
if (InStillPicture && !p[0] && !p[1] && p[2] == 0x01) {
fprintf(stderr, " %02x", p[3]);
}
#endif
// scan for picture header 0x00000100
if (!p[0] && !p[1] && p[2] == 0x01 && !p[3]) {
if (first) {
first = 0;
n -= 4;
p += 4;
continue;
}
// packet has already an picture header
tmp->size = p - tmp->data;
#if STILL_DEBUG>1
if (InStillPicture) {
fprintf(stderr, "\nfix:%9d,%02x %02x %02x %02x\n", tmp->size,
tmp->data[0], tmp->data[1], tmp->data[2], tmp->data[3]);
}
#endif
CodecVideoDecode(vdecoder, tmp);
// time-stamp only valid for first packet
tmp->pts = AV_NOPTS_VALUE;