bool QVideoDecoder::load(const QString & filename)
{
//if(!QFile::exists(filename))
// return false;
//QMutexLocker locker(&mutex);
static int debugCounter = 0;
AVInputFormat *inFmt = NULL;
AVFormatParameters formatParams;
memset(&formatParams, 0, sizeof(AVFormatParameters));
QString fileTmp = filename;
//if(debugCounter ++ <= 0)
//fileTmp = "vfwcap://0";
if(fileTmp == "C:/dummy.txt")
fileTmp = "vfwcap://0";
qDebug() << "[DEBUG] QVideoDecoder::load(): starting with fileTmp:"<<fileTmp;
bool customInputFormat = false;
if(fileTmp.indexOf("://") > -1)
{
QStringList list = fileTmp.split("://");
if(list.size() == 2)
{
qDebug() << "[DEBUG] QVideoDecoder::load(): input format args:"<<list;
fileTmp = list[1];
if(fileTmp.isEmpty())
fileTmp = "0";
avdevice_register_all();
QString fmt = list[0];
if(fmt == "cap")
fmt = "vfwcap";
inFmt = av_find_input_format(qPrintable(list[0]));
if( !inFmt )
{
qDebug() << "[ERROR] QVideoDecoder::load(): Unable to find input format:"<<list[0];
return -1;
}
formatParams.time_base.num = 1;
formatParams.time_base.den = 25;
customInputFormat = true;
}
}
// Open video file
//
if(av_open_input_file(&m_av_format_context, qPrintable(fileTmp), inFmt, 0, &formatParams) != 0)
//if(av_open_input_file(&m_av_format_context, "1", inFmt, 0, NULL) != 0)
{
qDebug() << "[WARN] QVideoDecoder::load(): av_open_input_file() failed, fileTmp:"<<fileTmp;
return false;
}
// Retrieve stream information
if(!customInputFormat)
if(av_find_stream_info(m_av_format_context) < 0)
{
qDebug() << "[WARN] QVideoDecoder::load(): av_find_stream_info() failed.";
return false;
}
int i;
// Find the first video stream
m_video_stream = -1;
m_audio_stream = -1;
for(i = 0; i < m_av_format_context->nb_streams; i++)
{
if(m_av_format_context->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO)
{
m_video_stream = i;
}
if(m_av_format_context->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO)
{
m_audio_stream = i;
}
}
if(m_video_stream == -1)
{
qDebug() << "[WARN] QVideoDecoder::load(): Cannot find video stream.";
return false;
}
// Get a pointer to the codec context for the video and audio streams
m_video_codec_context = m_av_format_context->streams[m_video_stream]->codec;
// m_video_codec_context->get_buffer = our_get_buffer;
// m_video_codec_context->release_buffer = our_release_buffer;
// Find the decoder for the video stream
m_video_codec =avcodec_find_decoder(m_video_codec_context->codec_id);
if(m_video_codec == NULL)
{
qDebug() << "[WARN] QVideoDecoder::load(): avcodec_find_decoder() failed.";
return false;
}
// Open codec
if(avcodec_open(m_video_codec_context, m_video_codec) < 0)
{
qDebug() << "[WARN] QVideoDecoder::load(): avcodec_open() failed.";
return false;
}
// Allocate video frame
m_av_frame = avcodec_alloc_frame();
// Allocate an AVFrame structure
m_av_rgb_frame =avcodec_alloc_frame();
if(m_av_rgb_frame == NULL)
{
qDebug() << "[WARN] QVideoDecoder::load(): avcodec_alloc_frame() failed.";
return false;
}
// Determine required buffer size and allocate buffer
//int num_bytes = avpicture_get_size(PIX_FMT_RGB32, m_video_codec_context->width, m_video_codec_context->height);
int num_bytes = avpicture_get_size(RAW_PIX_FMT, m_video_codec_context->width, m_video_codec_context->height);
m_buffer = (uint8_t *)av_malloc(num_bytes * sizeof(uint8_t));
// Assign appropriate parts of buffer to image planes in pFrameRGB
// Note that pFrameRGB is an AVFrame, but AVFrame is a superset of AVPicture
//avpicture_fill((AVPicture *)m_av_rgb_frame, m_buffer, PIX_FMT_RGB32, m_video_codec_context->width, m_video_codec_context->height);
avpicture_fill((AVPicture *)m_av_rgb_frame, m_buffer, RAW_PIX_FMT, m_video_codec_context->width, m_video_codec_context->height);
if(m_audio_stream != -1)
{
m_audio_codec_context = m_av_format_context->streams[m_audio_stream]->codec;
// // Set audio settings from codec info
// wanted_spec.freq = m_audio_codec_context->sample_rate;
// wanted_spec.format = AUDIO_S16SYS;
// wanted_spec.channels = m_audio_codec_context->channels;
// wanted_spec.silence = 0;
// wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
// //wanted_spec.callback = audio_callback;
// wanted_spec.userdata = m_audio_codec_context;
//
// if(SDL_OpenAudio(&wanted_spec, &spec) < 0)
// {
// //error
// return false;
// }
//
m_audio_codec = avcodec_find_decoder(m_audio_codec_context->codec_id);
if(!m_audio_codec)
{
//unsupported codec
return false;
}
avcodec_open(m_audio_codec_context, m_audio_codec);
}
m_timebase = m_av_format_context->streams[m_video_stream]->time_base;
calculateVideoProperties();
m_initial_decode = true;
decode();
m_video->m_video_loaded = true;
return true;
}
int VideoThread::initVideo()
{
//qDebug() << "VideoThread::initVideo()";
// avcodec_init();
// avcodec_register_all();
// avdevice_register_all();
// av_register_all();
QString fileTmp = m_videoFile;
//// qDebug() << "[DEBUG] VideoThread::load(): input file:"<<fileTmp;
AVInputFormat *inFmt = NULL;
AVFormatParameters formatParams;
memset(&formatParams, 0, sizeof(AVFormatParameters));
//qDebug() << "[DEBUG] VideoThread::load(): starting with fileTmp:"<<fileTmp;
// Open video file
//
int res = av_open_input_file(&m_av_format_context, qPrintable(fileTmp), inFmt, 0, &formatParams);
if(res != 0)
//if(av_open_input_file(&m_av_format_context, "1", inFmt, 0, NULL) != 0)
{
qDebug() << "[ERROR] VideoThread::load(): av_open_input_file() failed, fileTmp:"<<fileTmp<<", res:"<<res;
return false;
}
if(av_find_stream_info(m_av_format_context) < 0)
{
qDebug() << "[ERROR] VideoThread::load(): av_find_stream_info() failed.";
return false;
}
//dump_format(m_av_format_context, 0, qPrintable(m_cameraFile), 0);
qDebug() << "[DEBUG] dump_format():";
dump_format(m_av_format_context, 0, qPrintable(fileTmp), false);
uint i;
// Find the first video stream
m_video_stream = -1;
m_audio_stream = -1;
for(i = 0; i < m_av_format_context->nb_streams; i++)
{
if(m_av_format_context->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO)
{
m_video_stream = i;
}
if(m_av_format_context->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO)
{
m_audio_stream = i;
}
}
if(m_video_stream == -1)
{
qDebug() << "[ERROR] VideoThread::load(): Cannot find video stream.";
return false;
}
// Get a pointer to the codec context for the video and audio streams
m_video_codec_context = m_av_format_context->streams[m_video_stream]->codec;
// m_video_codec_context->get_buffer = our_get_buffer;
// m_video_codec_context->release_buffer = our_release_buffer;
// Find the decoder for the video stream
m_video_codec = avcodec_find_decoder(m_video_codec_context->codec_id);
if(m_video_codec == NULL)
{
qDebug() << "[ERROR] VideoThread::load(): avcodec_find_decoder() failed for codec_id:" << m_video_codec_context->codec_id;
return false;
}
// Open codec
if(avcodec_open(m_video_codec_context, m_video_codec) < 0)
{
qDebug() << "[ERROR] VideoThread::load(): avcodec_open() failed.";
return false;
}
// Allocate video frame
m_av_frame = avcodec_alloc_frame();
// Allocate an AVFrame structure
m_av_rgb_frame =avcodec_alloc_frame();
if(m_av_rgb_frame == NULL)
{
qDebug() << "[ERROR] VideoThread::load(): avcodec_alloc_frame() failed.";
return false;
}
// Determine required buffer size and allocate buffer
//int num_bytes = avpicture_get_size(PIX_FMT_RGB565, m_video_codec_context->width, m_video_codec_context->height);
int num_bytes = avpicture_get_size(PIX_FMT_RGB32, m_video_codec_context->width, m_video_codec_context->height);
m_buffer = (uint8_t *)av_malloc(num_bytes * sizeof(uint8_t));
// Assign appropriate parts of buffer to image planes in pFrameRGB
// Note that pFrameRGB is an AVFrame, but AVFrame is a superset of AVPicture
//avpicture_fill((AVPicture *)m_av_rgb_frame, m_buffer, PIX_FMT_RGB565,
avpicture_fill((AVPicture *)m_av_rgb_frame, m_buffer, PIX_FMT_RGB32,
m_video_codec_context->width, m_video_codec_context->height);
if(m_audio_stream != -1)
{
m_audio_codec_context = m_av_format_context->streams[m_audio_stream]->codec;
m_audio_codec = avcodec_find_decoder(m_audio_codec_context->codec_id);
if(!m_audio_codec)
{
//unsupported codec
return false;
}
avcodec_open(m_audio_codec_context, m_audio_codec);
}
m_timebase = m_av_format_context->streams[m_video_stream]->time_base;
m_readTimer = new QTimer();
//connect(m_readTimer, SIGNAL(timeout()), this, SLOT(readFrame()));
int ts = 1000/30; //int(m_timebase.den);
//qDebug() << "VideoThread::initVideo: setting interval to "<<ts<<", den:"<<m_timebase.den<<", num:"<<m_timebase.num;
m_readTimer->setInterval(ts);
calculateVideoProperties();
m_inited = true;
return 0;
}
