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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.
/// Copyright (c) 2018 - 2019 by zille. 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.
///
//////////////////////////////////////////////////////////////////////////////
#define noDUMP_TRICKSPEED ///< dump raw trickspeed packets
#ifndef __USE_GNU
#define __USE_GNU
#endif
#include <assert.h>
#include <unistd.h>
#include <libintl.h>
#define _(str) gettext(str) ///< gettext shortcut
#define _N(str) str ///< gettext_noop shortcut
#include <pthread.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/timestamp.h>
#include "iatomic.h" // portable atomic_t
#include "misc.h"
#include "softhddev.h"
#include "audio.h"
#include "video.h"
#include "codec.h"
#include "buf2rgb.h"
//////////////////////////////////////////////////////////////////////////////
// Variables
//////////////////////////////////////////////////////////////////////////////
extern int ConfigAudioBufferTime; ///< config size ms of audio buffer
#ifdef USE_GLES
extern int DisableOglOsd; ///< disable OpenGL OSD (command line parameter)
#endif
static volatile char StreamFreezed; ///< stream freezed
//////////////////////////////////////////////////////////////////////////////
// Video
//////////////////////////////////////////////////////////////////////////////
#define VIDEO_BUFFER_SIZE (512 * 1024) ///< 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__
{
VideoRender *Render; ///< video hardware decoder
VideoDecoder *Decoder; ///< video decoder
enum AVCodecID CodecID; ///< current codec id
AVCodecParameters * Par;
struct AVRational timebase;
int trickpkts; ///< how many avpkt does the decoder need in trickspeed mode?
volatile char NewStream; ///< flag new video stream
volatile char ClosingStream; ///< flag closing video stream
volatile char TrickSpeed; ///< flag trickspeed stream
int interlaced; ///< is this an interlaced stream?
AVPacket PacketRb[VIDEO_PACKET_MAX]; ///< PES packet ring buffer
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
static pthread_mutex_t PktsLockMutex; ///< video packets lock mutex
static pthread_mutex_t WaitCloseMutex = PTHREAD_MUTEX_INITIALIZER; ///< mutex for closing stream
static pthread_cond_t WaitCloseCondition; ///< condition for closing stream
//////////////////////////////////////////////////////////////////////////////
// Audio
//////////////////////////////////////////////////////////////////////////////
static 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
void PrintStreamData(const uint8_t *data, int size)
{
Debug("Data: %02x %02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x size %d",
data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8],
data[9], data[10], data[11], data[12], data[13], data[14], data[15], data[16], data[17],
data[18], data[19], data[20], data[21], data[22], data[23], data[24], data[25], data[26],
data[27], data[28], data[29], data[30], data[31], data[32], data[33], data[34], size);
}
/**
** Read if there a PES packet length in PES header.
**
** @returns 0 or 1
*/
static inline int PesHasLength(const uint8_t *p)
{
return p[4] | p[5];
}
/**
** Read the PES packet length from PES header.
**
** @returns length
*/
static inline int PesLength(const uint8_t *p)
{
return 6 + p[4] * 256 + p[5];
}
//////////////////////////////////////////////////////////////////////////////
// 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("pesdemux: mpeg%s layer%d bitrate=%d samplerate=%d %d bytes",
mpeg25 ? "2.5" : mpeg2 ? "2" : "1", layer, bit_rate, sample_rate,
frame_size);
}
if (frame_size + 4 > size) {
return -frame_size - 4;
}
#ifdef DEBUG
if (!FastMpegCheck(data + frame_size)) {
Debug("MpegCheck: after this frame NO new mpeg frame starts");
PrintStreamData(data + frame_size, frame_size);
}
#endif
return frame_size;
}
///
/// 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 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;
}
//////////////////////////////////////////////////////////////////////////////
// PES Demux
//////////////////////////////////////////////////////////////////////////////
/**
** Play audio packet.
**
** @param data data of exactly one complete PES packet
** @param size size of PES packet
** @param id PES packet type
*/
int PlayAudio(const uint8_t * data, int size, uint8_t id)
{
int n;
const uint8_t *p;
AVRational timebase;
timebase.den = 90000;
timebase.num = 1;
AudioAvPkt->pts = AV_NOPTS_VALUE;
if (StreamFreezed) { // stream is freezed, don't accept new audio data
Debug("PlayAudio: StreamFreezed");
return 0;
}
if (SkipAudio) { // skip audio
Debug("PlayAudio: skip audio");
return size;
}
// hard limit buffer full: don't overrun audio buffers on replay
// stream freezed
if (AudioFreeBytes() < AUDIO_MIN_BUFFER_FREE){
// Debug("PlayAudio: Buffer is Full (%d|%d)!", AudioFreeBytes(), AUDIO_MIN_BUFFER_FREE);
return 0;
}
if (NewAudioStream) {
// this clears the audio ringbuffer indirect, open and setup does it
Debug("PlayAudio: NewAudioStream");
CodecAudioClose(MyAudioDecoder);
// AudioFlushBuffers();
// AudioSetBufferTime(ConfigAudioBufferTime); // ???
AudioCodecID = AV_CODEC_ID_NONE;
AudioChannelID = -1;
NewAudioStream = 0;
}
// PES header 0x00 0x00 0x01 ID
// ID 0xBD 0xC0-0xCF
// must be a PES start code
if (size < 9 || !data || data[0] || data[1] || data[2] != 0x01) {
Error("invalid PES audio packet");
return size;
}
n = data[8]; // header size
if (size < 9 + n + 4) { // wrong size
if (size == 9 + n) {
Warning("empty audio packet");
} else {
Error("invalid audio packet %d bytes", size);
}
Info("PlayAudio: wrong size");
return size;
}
if (data[7] & 0x80 && n >= 5) {
AudioAvPkt->pts =
(int64_t) (data[9] & 0x0E) << 29 | data[10] << 22 | (data[11] &
0xFE) << 14 | data[12] << 7 | (data[13] & 0xFE) >> 1;
//Debug("audio: pts %#012" PRIx64 "\n", AudioAvPkt->pts);
} else {
Info("PlayAudio: No PTS!");
}
p = data + 9 + n;
n = size - 9 - n; // skip pes header
if (n + AudioAvPkt->stream_index > AudioAvPkt->size) {
Error("audio buffer too small needed %d avail %d",
n + AudioAvPkt->stream_index, AudioAvPkt->size);
AudioAvPkt->stream_index = 0;
}
if (AudioChannelID != id) { // id changed audio track changed
AudioChannelID = id;
AudioCodecID = AV_CODEC_ID_NONE;
Debug("audio/demux: new channel id");
}
// Private stream + LPCM ID
if ((id & 0xF0) == 0xA0) {
if (n < 7) {
Error("invalid LPCM audio packet %d bytes", size);
return size;
}
/* if (AudioCodecID != AV_CODEC_ID_PCM_DVD) {
static int samplerates[] = { 48000, 96000, 44100, 32000 };
int samplerate;
int channels;
int bits_per_sample;
Debug("%s: LPCM %d sr:%d bits:%d chan:%d\n",
__FUNCTION__, id, p[5] >> 4, (((p[5] >> 6) & 0x3) + 4) * 4,
(p[5] & 0x7) + 1);
CodecAudioClose(MyAudioDecoder);
bits_per_sample = (((p[5] >> 6) & 0x3) + 4) * 4;
if (bits_per_sample != 16) {
Error(_
("LPCM %d bits per sample aren't supported"),
bits_per_sample);
// FIXME: handle unsupported formats.
}
samplerate = samplerates[p[5] >> 4];
channels = (p[5] & 0x7) + 1;
// FIXME: ConfigAudioBufferTime + x
// AudioSetBufferTime(400);
// AudioSetup(&samplerate, &channels, 0);
if (samplerate != samplerates[p[5] >> 4]) {
Error("LPCM %d sample-rate is unsupported",
samplerates[p[5] >> 4]);
// FIXME: support resample
}
if (channels != (p[5] & 0x7) + 1) {
Error("LPCM %d channels are unsupported",
(p[5] & 0x7) + 1);
// FIXME: support resample
}
//CodecAudioOpen(MyAudioDecoder, AV_CODEC_ID_PCM_DVD);
AudioCodecID = AV_CODEC_ID_PCM_DVD;
}
if (AudioAvPkt->pts != (int64_t) AV_NOPTS_VALUE) {
// AudioSetClock(AudioAvPkt->pts);
AudioAvPkt->pts = AV_NOPTS_VALUE;
}
swab(p + 7, AudioAvPkt->data, n - 7);
Audiofilter(AudioAvPkt->data, n - 7, NULL); // Das muss in ein AVFrame gepackt werden!!!
*/
return size;
}
// DVD track header
if ((id & 0xF0) == 0x80 && (p[0] & 0xF0) == 0x80) {
p += 4;
n -= 4; // skip track header
// if (AudioCodecID == AV_CODEC_ID_NONE) {
// // FIXME: ConfigAudioBufferTime + x
// AudioSetBufferTime(400);
// }
}
// append new packet, to partial old data
memcpy(AudioAvPkt->data + AudioAvPkt->stream_index, p, n);
AudioAvPkt->stream_index += n;
n = AudioAvPkt->stream_index;
p = AudioAvPkt->data;
while (n >= 5) {
int r;
unsigned codec_id;
// 4 bytes 0xFFExxxxx Mpeg audio
// 3 bytes 0x56Exxx AAC LATM audio
// 5 bytes 0x0B77xxxxxx AC-3 audio
// 6 bytes 0x0B77xxxxxxxx E-AC-3 audio
// 7/9 bytes 0xFFFxxxxxxxxxxx ADTS audio
// PCM audio can't be found
r = 0;
codec_id = AV_CODEC_ID_NONE; // keep compiler happy
if (id != 0xbd && FastMpegCheck(p)) {
r = MpegCheck(p, n);
codec_id = AV_CODEC_ID_MP2;
}
if (id != 0xbd && !r && FastLatmCheck(p)) {
r = LatmCheck(p, n);
codec_id = AV_CODEC_ID_AAC_LATM;
}
if ((id == 0xbd || (id & 0xF0) == 0x80) && !r && FastAc3Check(p)) {
r = Ac3Check(p, n);
codec_id = AV_CODEC_ID_AC3;
if (r > 0 && p[5] > (10 << 3)) {
codec_id = AV_CODEC_ID_EAC3;
}
/* faster ac3 detection at end of pes packet (no improvemnts)
if (AudioCodecID == codec_id && -r - 2 == n) {
r = n;
}
*/
}
if (id != 0xbd && !r && FastAdtsCheck(p)) {
r = AdtsCheck(p, n);
codec_id = AV_CODEC_ID_AAC;
}
if (r < 0) { // need more bytes
break;
}
if (r > 0) {
AVPacket *avpkt;
// new codec id, close and open new
if (AudioCodecID != codec_id) {
CodecAudioClose(MyAudioDecoder);
CodecAudioOpen(MyAudioDecoder, codec_id, NULL, &timebase);
AudioCodecID = codec_id;
}
avpkt = av_packet_alloc();
if (avpkt == NULL) {
Error("avpkt allocation failed");
continue;
};
avpkt->data = (void *)p;
avpkt->size = r;
avpkt->pts = AudioAvPkt->pts;
CodecAudioDecode(MyAudioDecoder, avpkt);
AudioAvPkt->pts = AV_NOPTS_VALUE;
av_packet_free(&avpkt);
p += r;
n -= r;
continue;
}
++p;
--n;
}
// copy remaining bytes to start of packet
if (n) {
memmove(AudioAvPkt->data, p, n);
}
AudioAvPkt->stream_index = n;
return size;
}
/**
** Clears all audio data from the decoder and ringbufffer.
*/
void ClearAudio(void)
{
if (!SkipAudio) {
Debug("ClearAudio()");
CodecAudioFlushBuffers(MyAudioDecoder);
AudioFlushBuffers();
NewAudioStream = 1;
}
}
/**
** 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)
{
Debug("ResetChannelId:");
AudioChannelID = -1;
Debug("audio/demux: reset channel id");
}
//////////////////////////////////////////////////////////////////////////////
// Video
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
// helper functions to parse resolution from stream
const unsigned char * m_pStart;
unsigned short m_nLength;
int m_nCurrentBit;
unsigned int ReadBit()
{
assert(m_nCurrentBit <= m_nLength * 8);
int nIndex = m_nCurrentBit / 8;
int nOffset = m_nCurrentBit % 8 + 1;
m_nCurrentBit++;
return (m_pStart[nIndex] >> (8-nOffset)) & 0x01;
}
unsigned int ReadBits(int n)
{
int r = 0;
for (int i = 0; i < n; i++) {
r |= ( ReadBit() << ( n - i - 1 ) );
}
return r;
}
unsigned int ReadExponentialGolombCode()
{
int r = 0;
int i = 0;
while((ReadBit() == 0) && (i < 32)) {
i++;
}
r = ReadBits(i);
r += (1 << i) - 1;
return r;
}
unsigned int ReadSE()
{
int r = ReadExponentialGolombCode();
if (r & 0x01) {
r = (r+1)/2;
} else {
r = -(r/2);
}
return r;
}
void ParseResolutionH264(int *width, int *height)
{
AVPacket *avpkt;
m_pStart = NULL;
int i;
while (!VideoGetPackets()) {
usleep(10000);
}
avpkt = &MyVideoStream->PacketRb[MyVideoStream->PacketRead];
for (i = 0; i < avpkt->size; i++) {
if (!avpkt->data[i] && !avpkt->data[i + 1] && avpkt->data[i + 2] == 0x01 &&
(avpkt->data[i + 3] == 0x67 || avpkt->data[i + 3] == 0x27)) {
m_pStart = &avpkt->data[i + 4];
m_nLength = avpkt->size - i - 4;
break;
}
}
if (!m_pStart) {
Debug("ParseResolutionH264: No m_pStart %p Pkt %p Packets %d i %d",
m_pStart, avpkt, VideoGetPackets(), i);
PrintStreamData(avpkt->data, avpkt->size);
return;
}
m_nCurrentBit = 0;
int frame_crop_left_offset = 0;
int frame_crop_right_offset = 0;
int frame_crop_top_offset = 0;
int frame_crop_bottom_offset = 0;
int chroma_format_idc = 0;
int separate_colour_plane_flag = 0;
int profile_idc = ReadBits(8);
ReadBits(16);
ReadExponentialGolombCode();
if (profile_idc == 100 || profile_idc == 110 ||
profile_idc == 122 || profile_idc == 244 ||
profile_idc == 44 || profile_idc == 83 ||
profile_idc == 86 || profile_idc == 118) {
chroma_format_idc = ReadExponentialGolombCode();
if (chroma_format_idc == 3) {
separate_colour_plane_flag = ReadBit();
}
ReadExponentialGolombCode();
ReadExponentialGolombCode();
ReadBit();
int seq_scaling_matrix_present_flag = ReadBit();
if (seq_scaling_matrix_present_flag) {
for (int i = 0; i < 8; i++) {
int seq_scaling_list_present_flag = ReadBit();
if (seq_scaling_list_present_flag) {
int sizeOfScalingList = (i < 6) ? 16 : 64;
int lastScale = 8;
int nextScale = 8;
for (int j = 0; j < sizeOfScalingList; j++) {
if (nextScale != 0) {
int delta_scale = ReadSE();
nextScale = (lastScale + delta_scale + 256) % 256;
}
lastScale = (nextScale == 0) ? lastScale : nextScale;
}
}
}
}
}
ReadExponentialGolombCode();
int pic_order_cnt_type = ReadExponentialGolombCode();
if (pic_order_cnt_type == 0) {
ReadExponentialGolombCode();
} else if (pic_order_cnt_type == 1) {
ReadBit();
ReadSE();
ReadSE();
int num_ref_frames_in_pic_order_cnt_cycle = ReadExponentialGolombCode();
for (int i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++ ) {
ReadSE();
}
}
ReadExponentialGolombCode();
ReadBit();
int pic_width_in_mbs_minus1 = ReadExponentialGolombCode();
int pic_height_in_map_units_minus1 = ReadExponentialGolombCode();
int frame_mbs_only_flag = ReadBit();
if (!frame_mbs_only_flag) {
ReadBit();
}
ReadBit();
int frame_cropping_flag = ReadBit();
if (frame_cropping_flag) {
frame_crop_left_offset = ReadExponentialGolombCode();
frame_crop_right_offset = ReadExponentialGolombCode();
frame_crop_top_offset = ReadExponentialGolombCode();
frame_crop_bottom_offset = ReadExponentialGolombCode();
}
int SubWidthC = 0;
int SubHeightC = 0;
if (chroma_format_idc == 0 && separate_colour_plane_flag == 0) { //monochrome
SubWidthC = SubHeightC = 2;
} else if (chroma_format_idc == 1 && separate_colour_plane_flag == 0) { //4:2:0
SubWidthC = SubHeightC = 2;
} else if (chroma_format_idc == 2 && separate_colour_plane_flag == 0) { //4:2:2
SubWidthC = 2;
SubHeightC = 1;
} else if (chroma_format_idc == 3) { //4:4:4
if (separate_colour_plane_flag == 0) {
SubWidthC = SubHeightC = 1;
} else if (separate_colour_plane_flag == 1) {
SubWidthC = SubHeightC = 0;
}
}
*width = ((pic_width_in_mbs_minus1 + 1) * 16) -
SubWidthC * (frame_crop_right_offset + frame_crop_left_offset);
*height = ((2 - frame_mbs_only_flag)* (pic_height_in_map_units_minus1 +1) * 16) -
SubHeightC * ((frame_crop_bottom_offset * 2) + (frame_crop_top_offset * 2));
}
/**
** Initialize video packet ringbuffer.
**
** @param stream video stream
*/
static void VideoPacketInit(VideoStream * stream)
{
for (int i = 0; i < VIDEO_PACKET_MAX; ++i) {
AVPacket *avpkt;
avpkt = &stream->PacketRb[i];
if (av_new_packet(avpkt, VIDEO_BUFFER_SIZE)) {
Fatal("out of memory");
}
avpkt->size = 0;
}
atomic_set(&stream->PacketsFilled, 0);
stream->PacketRead = 0;
stream->PacketWrite = 0;
}
/**
** Cleanup video packet ringbuffer.
**