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avformatdecoder.cpp
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avformatdecoder.cpp
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// C headers
#include <cassert>
#include <unistd.h>
#include <cmath>
// C++ headers
#include <algorithm>
#include <iostream>
using namespace std;
#include <QTextCodec>
// MythTV headers
#include "mythconfig.h"
#include "avformatdecoder.h"
#include "privatedecoder.h"
#include "audiooutput.h"
#include "audiooutpututil.h"
#include "RingBuffer.h"
#include "mythplayer.h"
#include "remoteencoder.h"
#include "programinfo.h"
#include "mythcorecontext.h"
#include "mythdbcon.h"
#include "iso639.h"
#include "mpegtables.h"
#include "atscdescriptors.h"
#include "dvbdescriptors.h"
#include "cc608decoder.h"
#include "cc708decoder.h"
#include "teletextdecoder.h"
#include "subtitlereader.h"
#include "interactivetv.h"
#include "DVDRingBuffer.h"
#include "BDRingBuffer.h"
#include "videodisplayprofile.h"
#include "mythuihelper.h"
#include "lcddevice.h"
#include "videoout_quartz.h" // For VOQ::GetBestSupportedCodec()
#ifdef USING_XVMC
#include "videoout_xv.h"
extern "C" {
#include "libavcodec/xvmc.h"
}
#endif // USING_XVMC
#ifdef USING_VDPAU
#include "videoout_vdpau.h"
extern "C" {
#include "libavcodec/vdpau.h"
}
#endif // USING_VDPAU
extern "C" {
#include "libavutil/avutil.h"
#include "libavcodec/ac3_parser.h"
extern const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
extern void ff_read_frame_flush(AVFormatContext *s);
#include "libavformat/avio.h"
#include "libswscale/swscale.h"
#if CONFIG_LIBMPEG2EXTERNAL
#include <mpeg2dec/mpeg2.h>
#else
#include "../libmythmpeg2/mpeg2.h"
#endif
#include "ivtv_myth.h"
}
#define LOC QString("AFD: ")
#define LOC_ERR QString("AFD Error: ")
#define LOC_WARN QString("AFD Warning: ")
#define MAX_AC3_FRAME_SIZE 6144
static const float eps = 1E-5;
static const int max_video_queue_size = 180;
static int cc608_parity(uint8_t byte);
static int cc608_good_parity(const int *parity_table, uint16_t data);
static void cc608_build_parity_table(int *parity_table);
static int dts_syncinfo(uint8_t *indata_ptr, int *flags,
int *sample_rate, int *bit_rate);
static int dts_decode_header(uint8_t *indata_ptr, int *rate,
int *nblks, int *sfreq);
static int encode_frame(bool dts, unsigned char* data, int len,
short *samples, int &samples_size);
static QSize get_video_dim(const AVCodecContext &ctx)
{
return QSize(ctx.width >> ctx.lowres, ctx.height >> ctx.lowres);
}
static float get_aspect(const AVCodecContext &ctx)
{
float aspect_ratio = 0.0f;
if (ctx.sample_aspect_ratio.num && ctx.height)
{
aspect_ratio = av_q2d(ctx.sample_aspect_ratio) * (float) ctx.width;
aspect_ratio /= (float) ctx.height;
}
if (aspect_ratio <= 0.0f || aspect_ratio > 6.0f)
{
if (ctx.height)
aspect_ratio = (float)ctx.width / (float)ctx.height;
else
aspect_ratio = 4.0f / 3.0f;
}
return aspect_ratio;
}
int get_avf_buffer_xvmc(struct AVCodecContext *c, AVFrame *pic);
int get_avf_buffer(struct AVCodecContext *c, AVFrame *pic);
void release_avf_buffer(struct AVCodecContext *c, AVFrame *pic);
void release_avf_buffer_xvmc(struct AVCodecContext *c, AVFrame *pic);
void render_slice_xvmc(struct AVCodecContext *s, const AVFrame *src,
int offset[4], int y, int type, int height);
int get_avf_buffer_vdpau(struct AVCodecContext *c, AVFrame *pic);
void release_avf_buffer_vdpau(struct AVCodecContext *c, AVFrame *pic);
void render_slice_vdpau(struct AVCodecContext *s, const AVFrame *src,
int offset[4], int y, int type, int height);
static AVCodec *find_vdpau_decoder(AVCodec *c, enum CodecID id)
{
AVCodec *codec = c;
while (codec)
{
if (codec->id == id && CODEC_IS_VDPAU(codec))
return codec;
codec = codec->next;
}
return c;
}
static void myth_av_log(void *ptr, int level, const char* fmt, va_list vl)
{
if (VERBOSE_LEVEL_NONE)
return;
static QString full_line("");
static const int msg_len = 255;
static QMutex string_lock;
uint verbose_level = 0;
// determine mythtv debug level from av log level
switch (level)
{
case AV_LOG_PANIC:
case AV_LOG_FATAL:
verbose_level = VB_IMPORTANT;
break;
case AV_LOG_ERROR:
verbose_level = VB_GENERAL;
break;
case AV_LOG_DEBUG:
case AV_LOG_VERBOSE:
case AV_LOG_INFO:
verbose_level = VB_EXTRA;
case AV_LOG_WARNING:
verbose_level |= VB_LIBAV;
break;
default:
return;
}
if (!VERBOSE_LEVEL_CHECK(verbose_level))
return;
string_lock.lock();
if (full_line.isEmpty() && ptr) {
AVClass* avc = *(AVClass**)ptr;
full_line.sprintf("[%s @ %p]", avc->item_name(ptr), avc);
}
char str[msg_len+1];
int bytes = vsnprintf(str, msg_len+1, fmt, vl);
// check for truncated messages and fix them
if (bytes > msg_len)
{
VERBOSE(VB_IMPORTANT, QString("Libav log output truncated %1 of %2 bytes written")
.arg(msg_len).arg(bytes));
str[msg_len-1] = '\n';
}
full_line += QString(str);
if (full_line.endsWith("\n"))
{
full_line.truncate(full_line.length() - 1);
VERBOSE(verbose_level, full_line);
full_line.truncate(0);
}
string_lock.unlock();
}
static int get_canonical_lang(const char *lang_cstr)
{
if (lang_cstr[0] == '\0' || lang_cstr[1] == '\0')
{
return iso639_str3_to_key("und");
}
else if (lang_cstr[2] == '\0')
{
QString tmp2 = lang_cstr;
QString tmp3 = iso639_str2_to_str3(tmp2);
int lang = iso639_str3_to_key(tmp3);
return iso639_key_to_canonical_key(lang);
}
else
{
int lang = iso639_str3_to_key(lang_cstr);
return iso639_key_to_canonical_key(lang);
}
}
void AvFormatDecoder::GetDecoders(render_opts &opts)
{
opts.decoders->append("ffmpeg");
(*opts.equiv_decoders)["ffmpeg"].append("nuppel");
(*opts.equiv_decoders)["ffmpeg"].append("dummy");
#ifdef USING_XVMC
opts.decoders->append("xvmc");
opts.decoders->append("xvmc-vld");
(*opts.equiv_decoders)["xvmc"].append("dummy");
(*opts.equiv_decoders)["xvmc-vld"].append("dummy");
#endif
#ifdef USING_VDPAU
opts.decoders->append("vdpau");
(*opts.equiv_decoders)["vdpau"].append("dummy");
#endif
PrivateDecoder::GetDecoders(opts);
}
AvFormatDecoder::AvFormatDecoder(MythPlayer *parent,
const ProgramInfo &pginfo,
bool use_null_videoout,
bool allow_private_decode,
bool no_hardware_decode,
AVSpecialDecode special_decoding)
: DecoderBase(parent, pginfo),
private_dec(NULL),
is_db_ignored(gCoreContext->IsDatabaseIgnored()),
m_h264_parser(new H264Parser()),
ic(NULL),
frame_decoded(0), decoded_video_frame(NULL),
avfRingBuffer(NULL), sws_ctx(NULL),
directrendering(false),
gopset(false), seen_gop(false),
seq_count(0),
prevgoppos(0), gotvideo(false),
skipaudio(false), allowedquit(false),
start_code_state(0xffffffff),
lastvpts(0), lastapts(0),
lastccptsu(0),
faulty_pts(0), faulty_dts(0),
last_pts_for_fault_detection(0),
last_dts_for_fault_detection(0),
pts_detected(false),
reordered_pts_detected(false),
pts_selected(true),
using_null_videoout(use_null_videoout),
video_codec_id(kCodec_NONE),
no_hardware_decoders(no_hardware_decode),
allow_private_decoders(allow_private_decode),
special_decode(special_decoding),
maxkeyframedist(-1),
// Closed Caption & Teletext decoders
ccd608(new CC608Decoder(parent->GetCC608Reader())),
ccd708(new CC708Decoder(parent->GetCC708Reader())),
ttd(new TeletextDecoder(parent->GetTeletextReader())),
subReader(parent->GetSubReader()),
// Interactive TV
itv(NULL),
// Audio
audioSamples(NULL),
internal_vol(false),
disable_passthru(false),
dummy_frame(NULL),
// DVD
dvd_xvmc_enabled(false), dvd_video_codec_changed(false),
m_fps(0.0f)
{
bzero(¶ms, sizeof(AVFormatParameters));
bzero(&readcontext, sizeof(readcontext));
// using preallocated AVFormatContext for our own ByteIOContext
params.prealloced_context = 1;
audioSamples = (short int *)av_mallocz(AVCODEC_MAX_AUDIO_FRAME_SIZE *
sizeof(int32_t));
ccd608->SetIgnoreTimecode(true);
bool debug = VERBOSE_LEVEL_CHECK(VB_LIBAV);
av_log_set_level((debug) ? AV_LOG_DEBUG : AV_LOG_ERROR);
av_log_set_callback(myth_av_log);
internal_vol = gCoreContext->GetNumSetting("MythControlsVolume", 0);
audioIn.sample_size = -32; // force SetupAudioStream to run once
itv = m_parent->GetInteractiveTV();
cc608_build_parity_table(cc608_parity_table);
if (gCoreContext->GetNumSetting("CCBackground", 0))
CC708Window::forceWhiteOnBlackText = true;
no_dts_hack = false;
int x = gCoreContext->GetNumSetting("CommFlagFast", 0);
VERBOSE(VB_COMMFLAG, LOC + QString("CommFlagFast: %1").arg(x));
if (x == 0)
special_decode = kAVSpecialDecode_None;
VERBOSE(VB_COMMFLAG, LOC + QString("Special Decode Flags: 0x%1")
.arg(special_decode, 0, 16));
}
AvFormatDecoder::~AvFormatDecoder()
{
while (!storedPackets.isEmpty())
{
AVPacket *pkt = storedPackets.takeFirst();
av_free_packet(pkt);
delete pkt;
}
CloseContext();
delete ccd608;
delete ccd708;
delete ttd;
delete private_dec;
delete m_h264_parser;
sws_freeContext(sws_ctx);
av_freep((void *)&audioSamples);
if (dummy_frame)
{
delete [] dummy_frame->buf;
delete dummy_frame;
dummy_frame = NULL;
}
if (avfRingBuffer)
delete avfRingBuffer;
if (LCD *lcd = LCD::Get())
{
lcd->setAudioFormatLEDs(AUDIO_AC3, false);
lcd->setVideoFormatLEDs(VIDEO_MPG, false);
lcd->setVariousLEDs(VARIOUS_HDTV, false);
lcd->setVariousLEDs(VARIOUS_SPDIF, false);
lcd->setSpeakerLEDs(SPEAKER_71, false); // should clear any and all speaker LEDs
}
}
void AvFormatDecoder::CloseCodecs()
{
if (ic)
{
for (uint i = 0; i < ic->nb_streams; i++)
{
QMutexLocker locker(avcodeclock);
AVStream *st = ic->streams[i];
if (st->codec->codec)
avcodec_close(st->codec);
}
}
}
void AvFormatDecoder::CloseContext()
{
if (ic)
{
CloseCodecs();
AVInputFormat *fmt = ic->iformat;
ic->iformat->flags |= AVFMT_NOFILE;
av_free(ic->pb->buffer);
av_free(ic->pb);
av_close_input_file(ic);
ic = NULL;
fmt->flags &= ~AVFMT_NOFILE;
}
delete private_dec;
private_dec = NULL;
m_h264_parser->Reset();
}
static int64_t lsb3full(int64_t lsb, int64_t base_ts, int lsb_bits)
{
int64_t mask = (lsb_bits < 64) ? (1LL<<lsb_bits)-1 : -1LL;
return ((lsb - base_ts)&mask);
}
int64_t AvFormatDecoder::NormalizeVideoTimecode(int64_t timecode)
{
int64_t start_pts = 0, pts;
AVStream *st = NULL;
for (uint i = 0; i < ic->nb_streams; i++)
{
AVStream *st1 = ic->streams[i];
if (st1 && st1->codec->codec_type == CODEC_TYPE_VIDEO)
{
st = st1;
break;
}
}
if (!st)
return false;
if (ic->start_time != AV_NOPTS_VALUE)
start_pts = av_rescale(ic->start_time,
st->time_base.den,
AV_TIME_BASE * (int64_t)st->time_base.num);
pts = av_rescale(timecode / 1000.0,
st->time_base.den,
st->time_base.num);
// adjust for start time and wrap
pts = lsb3full(pts, start_pts, st->pts_wrap_bits);
return (int64_t)(av_q2d(st->time_base) * pts * 1000);
}
int64_t AvFormatDecoder::NormalizeVideoTimecode(AVStream *st,
int64_t timecode)
{
int64_t start_pts = 0, pts;
if (ic->start_time != AV_NOPTS_VALUE)
start_pts = av_rescale(ic->start_time,
st->time_base.den,
AV_TIME_BASE * (int64_t)st->time_base.num);
pts = av_rescale(timecode / 1000.0,
st->time_base.den,
st->time_base.num);
// adjust for start time and wrap
pts = lsb3full(pts, start_pts, st->pts_wrap_bits);
return (int64_t)(av_q2d(st->time_base) * pts * 1000);
}
int AvFormatDecoder::GetNumChapters()
{
if (ic->nb_chapters > 1)
return ic->nb_chapters;
return 0;
}
void AvFormatDecoder::GetChapterTimes(QList<long long> ×)
{
int total = GetNumChapters();
if (!total)
return;
for (int i = 0; i < total; i++)
{
int num = ic->chapters[i]->time_base.num;
int den = ic->chapters[i]->time_base.den;
int64_t start = ic->chapters[i]->start;
long double total_secs = (long double)start * (long double)num / (long double)den;
times.push_back((long long)total_secs);
}
}
int AvFormatDecoder::GetCurrentChapter(long long framesPlayed)
{
if (!GetNumChapters())
return 0;
for (int i = (ic->nb_chapters - 1); i > -1 ; i--)
{
int num = ic->chapters[i]->time_base.num;
int den = ic->chapters[i]->time_base.den;
int64_t start = ic->chapters[i]->start;
long double total_secs = (long double)start * (long double)num / (long double)den;
long long framenum = (long long)(total_secs * fps);
if (framesPlayed >= framenum)
{
VERBOSE(VB_IMPORTANT, LOC +
QString("GetCurrentChapter(selected chapter %1 framenum %2)")
.arg(i + 1).arg(framenum));
return i + 1;
}
}
return 0;
}
long long AvFormatDecoder::GetChapter(int chapter)
{
if (chapter < 1 || chapter > GetNumChapters())
return -1;
int num = ic->chapters[chapter - 1]->time_base.num;
int den = ic->chapters[chapter - 1]->time_base.den;
int64_t start = ic->chapters[chapter - 1]->start;
long double total_secs = (long double)start * (long double)num / (long double)den;
long long framenum = (long long)(total_secs * fps);
VERBOSE(VB_PLAYBACK, LOC + QString("GetChapter %1: framenum %2")
.arg(chapter).arg(framenum));
return framenum;
}
bool AvFormatDecoder::DoRewind(long long desiredFrame, bool discardFrames)
{
VERBOSE(VB_PLAYBACK, LOC + "DoRewind("
<<desiredFrame<<", "
<<( discardFrames ? "do" : "don't" )<<" discard frames)");
if (recordingHasPositionMap || livetv)
return DecoderBase::DoRewind(desiredFrame, discardFrames);
dorewind = true;
// avformat-based seeking
return DoFastForward(desiredFrame, discardFrames);
}
bool AvFormatDecoder::DoFastForward(long long desiredFrame, bool discardFrames)
{
VERBOSE(VB_PLAYBACK, LOC +
QString("DoFastForward(%1 (%2), %3 discard frames)")
.arg(desiredFrame).arg(framesPlayed)
.arg((discardFrames) ? "do" : "don't"));
if (recordingHasPositionMap || livetv)
return DecoderBase::DoFastForward(desiredFrame, discardFrames);
bool oldrawstate = getrawframes;
getrawframes = false;
AVStream *st = NULL;
for (uint i = 0; i < ic->nb_streams; i++)
{
AVStream *st1 = ic->streams[i];
if (st1 && st1->codec->codec_type == CODEC_TYPE_VIDEO)
{
st = st1;
break;
}
}
if (!st)
return false;
int seekDelta = desiredFrame - framesPlayed;
// avoid using av_frame_seek if we are seeking frame-by-frame when paused
if (seekDelta >= 0 && seekDelta < 2 && !dorewind && m_parent->GetPlaySpeed() == 0.0f)
{
SeekReset(framesPlayed, seekDelta, false, true);
m_parent->SetFramesPlayed(framesPlayed + 1);
m_parent->getVideoOutput()->SetFramesPlayed(framesPlayed + 1);
return true;
}
AVCodecContext *context = st->codec;
long long ts = 0;
if (ic->start_time != (int64_t)AV_NOPTS_VALUE)
ts = ic->start_time;
// convert framenumber to normalized timestamp
long double seekts = desiredFrame * AV_TIME_BASE / fps;
ts += (long long)seekts;
bool exactseeks = DecoderBase::getExactSeeks();
int flags = (dorewind || exactseeks) ? AVSEEK_FLAG_BACKWARD : 0;
if (av_seek_frame(ic, -1, ts, flags) < 0)
{
VERBOSE(VB_IMPORTANT, LOC_ERR
<<"av_seek_frame(ic, -1, "<<ts<<", 0) -- error");
return false;
}
int normalframes = 0;
if (st->cur_dts != (int64_t)AV_NOPTS_VALUE)
{
int64_t adj_cur_dts = st->cur_dts;
if (ic->start_time != (int64_t)AV_NOPTS_VALUE)
{
int64_t st1 = av_rescale(ic->start_time,
st->time_base.den,
AV_TIME_BASE * (int64_t)st->time_base.num);
adj_cur_dts = lsb3full(adj_cur_dts, st1, st->pts_wrap_bits);
}
int64_t adj_seek_dts = av_rescale(seekts,
st->time_base.den,
AV_TIME_BASE * (int64_t)st->time_base.num);
int64_t max_dts = (st->pts_wrap_bits < 64) ? (1LL<<st->pts_wrap_bits)-1 : -1LL;
// When seeking near the start of a stream the current dts is sometimes
// less than the start time which causes lsb3full to return adj_cur_dts
// close to the maximum dts value. If so, set adj_cur_dts to zero.
if (adj_seek_dts < max_dts / 64 && adj_cur_dts > max_dts / 2)
adj_cur_dts = 0;
long long newts = av_rescale(adj_cur_dts,
(int64_t)AV_TIME_BASE * (int64_t)st->time_base.num,
st->time_base.den);
lastKey = (long long)((newts*(long double)fps)/AV_TIME_BASE);
framesPlayed = lastKey;
framesRead = lastKey;
normalframes = (exactseeks) ? desiredFrame - framesPlayed : 0;
normalframes = max(normalframes, 0);
no_dts_hack = false;
}
else
{
VERBOSE(VB_GENERAL, LOC + "No DTS Seeking Hack!");
no_dts_hack = true;
framesPlayed = desiredFrame;
framesRead = desiredFrame;
normalframes = 0;
}
SeekReset(lastKey, normalframes, true, discardFrames);
if (discardFrames)
{
m_parent->SetFramesPlayed(framesPlayed + 1);
m_parent->getVideoOutput()->SetFramesPlayed(framesPlayed + 1);
}
dorewind = false;
getrawframes = oldrawstate;
return true;
}
void AvFormatDecoder::SeekReset(long long newKey, uint skipFrames,
bool doflush, bool discardFrames)
{
if (ringBuffer->isDVD())
{
if (ringBuffer->InDVDMenuOrStillFrame() ||
newKey == 0)
return;
}
VERBOSE(VB_PLAYBACK, LOC +
QString("SeekReset(%1, %2, %3 flush, %4 discard)")
.arg(newKey).arg(skipFrames)
.arg((doflush) ? "do" : "don't")
.arg((discardFrames) ? "do" : "don't"));
DecoderBase::SeekReset(newKey, skipFrames, doflush, discardFrames);
if (doflush)
{
lastapts = 0;
lastvpts = 0;
lastccptsu = 0;
faulty_pts = faulty_dts = 0;
last_pts_for_fault_detection = 0;
last_dts_for_fault_detection = 0;
pts_detected = false;
reordered_pts_detected = false;
ff_read_frame_flush(ic);
// Only reset the internal state if we're using our seeking,
// not when using libavformat's seeking
if (recordingHasPositionMap || livetv)
{
ic->pb->pos = ringBuffer->GetReadPosition();
ic->pb->buf_ptr = ic->pb->buffer;
ic->pb->buf_end = ic->pb->buffer;
ic->pb->eof_reached = 0;
}
// Flush the avcodec buffers
VERBOSE(VB_PLAYBACK, LOC + "SeekReset() flushing");
for (uint i = 0; i < ic->nb_streams; i++)
{
AVCodecContext *enc = ic->streams[i]->codec;
if (enc->codec)
avcodec_flush_buffers(enc);
}
if (private_dec)
private_dec->Reset();
}
// Discard all the queued up decoded frames
if (discardFrames)
m_parent->DiscardVideoFrames(doflush);
if (doflush)
{
// Free up the stored up packets
while (!storedPackets.isEmpty())
{
AVPacket *pkt = storedPackets.takeFirst();
av_free_packet(pkt);
delete pkt;
}
prevgoppos = 0;
gopset = false;
if (!ringBuffer->isDVD())
{
if (!no_dts_hack)
{
framesPlayed = lastKey;
framesRead = lastKey;
}
no_dts_hack = false;
}
}
// Skip all the desired number of skipFrames
for (;skipFrames > 0 && !ateof; skipFrames--)
{
GetFrame(kDecodeVideo);
if (decoded_video_frame)
m_parent->DiscardVideoFrame(decoded_video_frame);
}
}
void AvFormatDecoder::SetEof(bool eof)
{
if (!eof && ic && ic->pb)
{
VERBOSE(VB_IMPORTANT, LOC +
QString("Resetting byte context eof (livetv %1 was eof %2)")
.arg(livetv).arg(ic->pb->eof_reached));
ic->pb->eof_reached = 0;
}
DecoderBase::SetEof(eof);
}
void AvFormatDecoder::Reset(bool reset_video_data, bool seek_reset)
{
VERBOSE(VB_PLAYBACK, LOC + QString("Reset(%1, %2)")
.arg(reset_video_data).arg(seek_reset));
if (seek_reset)
SeekReset(0, 0, true, false);
if (reset_video_data)
{
ResetPosMap();
framesPlayed = 0;
framesRead = 0;
seen_gop = false;
seq_count = 0;
}
}
void AvFormatDecoder::Reset()
{
DecoderBase::Reset();
if (ringBuffer->isDVD())
SyncPositionMap();
}
bool AvFormatDecoder::CanHandle(char testbuf[kDecoderProbeBufferSize],
const QString &filename, int testbufsize)
{
{
QMutexLocker locker(avcodeclock);
av_register_all();
}
AVProbeData probe;
QByteArray fname = filename.toAscii();
probe.filename = fname.constData();
probe.buf = (unsigned char *)testbuf;
probe.buf_size = testbufsize;
int score = AVPROBE_SCORE_MAX/4;
if (testbufsize + AVPROBE_PADDING_SIZE > kDecoderProbeBufferSize)
{
probe.buf_size = kDecoderProbeBufferSize - AVPROBE_PADDING_SIZE;
score = 0;
}
else if (testbufsize*2 >= kDecoderProbeBufferSize)
{
score--;
}
if (av_probe_input_format2(&probe, true, &score))
return true;
return false;
}
void AvFormatDecoder::InitByteContext(void)
{
int streamed = 0;
int buffer_size = 32768;
if (ringBuffer->isDVD()) {
streamed = 1;
buffer_size = 2048;
}
else if (ringBuffer->LiveMode())
streamed = 1;
readcontext.prot = &AVF_RingBuffer_Protocol;
readcontext.flags = 0;
readcontext.is_streamed = streamed;
readcontext.max_packet_size = 0;
readcontext.priv_data = avfRingBuffer;
unsigned char* buffer = (unsigned char *)av_malloc(buffer_size);
ic->pb = av_alloc_put_byte(buffer, buffer_size, 0,
&readcontext,
AVF_Read_Packet,
AVF_Write_Packet,
AVF_Seek_Packet);
ic->pb->is_streamed = streamed;
}
extern "C" void HandleStreamChange(void* data)
{
AvFormatDecoder* decoder = (AvFormatDecoder*) data;
int cnt = decoder->ic->nb_streams;
VERBOSE(VB_PLAYBACK, LOC + "HandleStreamChange(): "
"streams_changed "<<data<<" -- stream count "<<cnt);
QMutexLocker locker(avcodeclock);
decoder->SeekReset(0, 0, true, true);
decoder->ScanStreams(false);
}
extern "C" void HandleDVDStreamChange(void* data)
{
AvFormatDecoder* decoder = (AvFormatDecoder*) data;
int cnt = decoder->ic->nb_streams;
VERBOSE(VB_PLAYBACK, LOC + "HandleDVDStreamChange(): "
"streams_changed "<<data<<" -- stream count "<<cnt);
QMutexLocker locker(avcodeclock);
//decoder->SeekReset(0, 0, true, true);
decoder->ScanStreams(true);
}
/**
* OpenFile opens a ringbuffer for playback.
*
* OpenFile deletes any existing context then use testbuf to
* guess at the stream type. It then calls ScanStreams to find
* any valid streams to decode. If possible a position map is
* also built for quick skipping.
*
* \param rbuffer pointer to a valid ringuffer.
* \param novideo if true then no video is sought in ScanSreams.
* \param testbuf this parameter is not used by AvFormatDecoder.
*/
int AvFormatDecoder::OpenFile(RingBuffer *rbuffer, bool novideo,
char testbuf[kDecoderProbeBufferSize],
int testbufsize)
{
CloseContext();
ringBuffer = rbuffer;
if (avfRingBuffer)
delete avfRingBuffer;
avfRingBuffer = new AVFRingBuffer(rbuffer);
AVInputFormat *fmt = NULL;
QString fnames = ringBuffer->GetFilename();
QByteArray fnamea = fnames.toAscii();
const char *filename = fnamea.constData();
AVProbeData probe;
probe.filename = filename;
probe.buf = (unsigned char *)testbuf;
if (testbufsize + AVPROBE_PADDING_SIZE <= kDecoderProbeBufferSize)
probe.buf_size = testbufsize;
else
probe.buf_size = kDecoderProbeBufferSize - AVPROBE_PADDING_SIZE;
fmt = av_probe_input_format(&probe, true);
if (!fmt)
{
VERBOSE(VB_IMPORTANT, LOC_ERR +
QString("Probe failed for file: \"%1\".").arg(filename));
return -1;
}
fmt->flags |= AVFMT_NOFILE;
ic = avformat_alloc_context();
if (!ic)
{
VERBOSE(VB_IMPORTANT, LOC_ERR +
"Could not allocate format context.");
return -1;
}
InitByteContext();
int err = av_open_input_stream(&ic, ic->pb, filename, fmt, ¶ms);
if (err < 0)
{
VERBOSE(VB_IMPORTANT, LOC_ERR
<<"avformat err("<<err<<") on av_open_input_file call.");
return -1;
}
int ret = -1;
{
QMutexLocker locker(avcodeclock);
ret = av_find_stream_info(ic);
}
if (ringBuffer->isDVD())
{
if (!ringBuffer->DVD()->StartFromBeginning())
return -1;
ringBuffer->DVD()->IgnoreStillOrWait(false);
}
if (ret < 0)
{
VERBOSE(VB_IMPORTANT, LOC_ERR + "Could not find codec parameters. " +
QString("file was \"%1\".").arg(filename));
av_close_input_file(ic);
ic = NULL;
return -1;
}
ic->streams_changed = HandleStreamChange;
if (ringBuffer->isDVD())
ic->streams_changed = HandleDVDStreamChange;
ic->stream_change_data = this;
fmt->flags &= ~AVFMT_NOFILE;
if (!ringBuffer->isDVD() && !ringBuffer->isBD() && !livetv)
{
av_estimate_timings(ic, 0);
// generate timings based on the video stream to avoid bogus ffmpeg
// values for duration and bitrate
av_update_stream_timings_video(ic);
}
// Scan for the initial A/V streams
ret = ScanStreams(novideo);
if (-1 == ret)
return ret;
AutoSelectTracks(); // This is needed for transcoder
#ifdef USING_MHEG
{
int initialAudio = -1, initialVideo = -1;
if (itv || (itv = m_parent->GetInteractiveTV()))
itv->GetInitialStreams(initialAudio, initialVideo);
if (initialAudio >= 0)
SetAudioByComponentTag(initialAudio);
if (initialVideo >= 0)
SetVideoByComponentTag(initialVideo);
}
#endif // USING_MHEG
// Try to get a position map from the recorder if we don't have one yet.
if (!recordingHasPositionMap)
{
if ((m_playbackinfo) || livetv || watchingrecording)
{
recordingHasPositionMap |= SyncPositionMap();
if (recordingHasPositionMap && !livetv && !watchingrecording)
{
hasFullPositionMap = true;
gopset = true;
}
}
}