static GstFlowReturn request_buffer(GstPad *pad, guint64 ofs, guint size, GstCaps *caps, GstBuffer **buf) {
GstTfImpl *This = gst_pad_get_element_private(pad);
IMediaSample *sample;
BYTE *ptr;
HRESULT hr;
TRACE("Requesting buffer\n");
hr = BaseOutputPinImpl_GetDeliveryBuffer((BaseOutputPin*)This->tf.ppPins[1], &sample, NULL, NULL, 0);
if (FAILED(hr)) {
ERR("Could not get output buffer: %08x\n", hr);
return GST_FLOW_WRONG_STATE;
}
IMediaSample_SetActualDataLength(sample, size);
IMediaSample_GetPointer(sample, &ptr);
*buf = gst_app_buffer_new(ptr, size, release_sample, sample);
if (!*buf) {
IMediaSample_Release(sample);
ERR("Out of memory\n");
return GST_FLOW_ERROR;
}
if (!caps)
caps = gst_pad_get_caps_reffed(This->my_sink);
gst_buffer_set_caps(*buf, caps);
return GST_FLOW_OK;
}
void QGstAppSrc::pushDataToAppSrc()
{
if (!isStreamValid() || !m_setup)
return;
if (m_dataRequested && !m_enoughData) {
qint64 size;
if (m_dataRequestSize == (unsigned int)-1)
size = qMin(m_stream->bytesAvailable(), queueSize());
else
size = qMin(m_stream->bytesAvailable(), (qint64)m_dataRequestSize);
void *data = g_malloc(size);
GstBuffer* buffer = gst_app_buffer_new(data, size, g_free, data);
buffer->offset = m_stream->pos();
qint64 bytesRead = m_stream->read((char*)GST_BUFFER_DATA(buffer), size);
buffer->offset_end = buffer->offset + bytesRead - 1;
if (bytesRead > 0) {
m_dataRequested = false;
m_enoughData = false;
GstFlowReturn ret = gst_app_src_push_buffer (GST_APP_SRC (element()), buffer);
if (ret == GST_FLOW_ERROR) {
qWarning()<<"appsrc: push buffer error";
} else if (ret == GST_FLOW_WRONG_STATE) {
qWarning()<<"appsrc: push buffer wrong state";
} else if (ret == GST_FLOW_RESEND) {
qWarning()<<"appsrc: push buffer resend";
}
}
} else if (m_stream->atEnd()) {
sendEOS();
}
}
//--------------------------------------------------------------
void testApp::update(){
grabber.update();
if(grabber.isFrameNew()){
GstBuffer * buffer;
if( 1 ){
unsigned char * lpBits24 = grabber.getPixels();
memcpy(pixels.getPixels(), lpBits24, 640*480*3);
//for(int i=0;i<640*480;i++){
// int nPos24 = i*3;
//
// pixels[nPos24] = lpBits24[;
// pixels[nPos24+1] = (lpBits24[i*3]+lpBits24[i*3+1]+lpBits24[i*3+2])*.3333;
// pixels[nPos24+2] = 0;
//
//}
buffer = gst_app_buffer_new (pixels.getPixels(), 640*480*3, NULL, pixels.getPixels());
}
GstFlowReturn flow_return = gst_app_src_push_buffer(gstSrc, buffer);
if (flow_return != GST_FLOW_OK) {
ofLog(OF_LOG_WARNING,"error pushing buffer");
}
gst.update();
}
grabber.draw(0,0);
}
int
main (int argc, char *argv[])
{
App *app = &s_app;
int i;
gst_init (&argc, &argv);
app->pipe = gst_pipeline_new (NULL);
g_assert (app->pipe);
app->src = gst_element_factory_make ("appsrc", NULL);
g_assert (app->src);
gst_bin_add (GST_BIN (app->pipe), app->src);
app->id = gst_element_factory_make ("identity", NULL);
g_assert (app->id);
gst_bin_add (GST_BIN (app->pipe), app->id);
app->sink = gst_element_factory_make ("appsink", NULL);
g_assert (app->sink);
gst_bin_add (GST_BIN (app->pipe), app->sink);
gst_element_link (app->src, app->id);
gst_element_link (app->id, app->sink);
gst_element_set_state (app->pipe, GST_STATE_PLAYING);
for (i = 0; i < 10; i++) {
GstBuffer *buf;
void *data;
data = malloc (100);
memset (data, i, 100);
buf = gst_app_buffer_new (data, 100, dont_eat_my_chicken_wings, data);
printf ("%d: creating buffer for pointer %p, %p\n", i, data, buf);
gst_app_src_push_buffer (GST_APP_SRC (app->src), buf);
}
gst_app_src_end_of_stream (GST_APP_SRC (app->src));
while (!gst_app_sink_is_eos (GST_APP_SINK (app->sink))) {
GstBuffer *buf;
buf = gst_app_sink_pull_buffer (GST_APP_SINK (app->sink));
printf ("retrieved buffer %p\n", buf);
gst_buffer_unref (buf);
}
gst_element_set_state (app->pipe, GST_STATE_NULL);
return 0;
}
void
shmdata_any_writer_push_data (shmdata_any_writer_t * context,
void *data,
int size,
unsigned long long timestamp,
void (*done_with_data) (void *),
void *user_data)
{
GstBuffer *buf;
buf = gst_app_buffer_new (data, size, done_with_data, user_data);
GST_BUFFER_TIMESTAMP (buf) = (GstClockTime) (timestamp);
gst_app_src_push_buffer (GST_APP_SRC (context->src_), buf);
}
static HRESULT WINAPI Gstreamer_transform_ProcessData(TransformFilter *iface, IMediaSample *sample) {
GstTfImpl *This = (GstTfImpl*)iface;
REFERENCE_TIME tStart, tStop;
BYTE *data;
GstBuffer *buf;
HRESULT hr;
int ret;
TRACE("Reading %p\n", sample);
EnterCriticalSection(&This->tf.filter.csFilter);
IMediaSample_GetPointer(sample, &data);
buf = gst_app_buffer_new(data, IMediaSample_GetActualDataLength(sample), release_sample, sample);
if (!buf) {
LeaveCriticalSection(&This->tf.filter.csFilter);
return S_OK;
}
gst_buffer_set_caps(buf, gst_pad_get_caps_reffed(This->my_src));
IMediaSample_AddRef(sample);
buf->duration = buf->timestamp = -1;
hr = IMediaSample_GetTime(sample, &tStart, &tStop);
if (SUCCEEDED(hr)) {
buf->timestamp = tStart * 100;
if (hr == S_OK)
buf->duration = (tStop - tStart)*100;
}
if (IMediaSample_GetMediaTime(sample, &tStart, &tStop) == S_OK) {
buf->offset = tStart * 100;
buf->offset_end = tStop * 100;
}
if (IMediaSample_IsDiscontinuity(sample) == S_OK)
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_FLAG_DISCONT);
if (IMediaSample_IsPreroll(sample) == S_OK)
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_FLAG_PREROLL);
if (IMediaSample_IsSyncPoint(sample) != S_OK)
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_FLAG_DELTA_UNIT);
LeaveCriticalSection(&This->tf.filter.csFilter);
ret = gst_pad_push(This->my_src, buf);
if (ret)
WARN("Sending returned: %i\n", ret);
if (ret == GST_FLOW_ERROR)
return E_FAIL;
if (ret == GST_FLOW_WRONG_STATE)
return VFW_E_WRONG_STATE;
if (ret == GST_FLOW_RESEND)
return S_FALSE;
return S_OK;
}
void
shmdata_any_writer_push_data_with_duration (shmdata_any_writer_t * context,
void *data,
int size,
unsigned long long timestamp,
unsigned long long duration,
unsigned long long offset,
unsigned long long offset_end,
void (*done_with_data) (void *),
void *user_data)
{
GstBuffer *buf;
buf = gst_app_buffer_new (data, size, done_with_data, user_data);
GST_BUFFER_TIMESTAMP (buf) = (GstClockTime) (timestamp);
GST_BUFFER_DURATION (buf) = (GstClockTime) (duration);
GST_BUFFER_OFFSET (buf) = (GstClockTime) (offset);
GST_BUFFER_OFFSET_END (buf) = (GstClockTime) (offset_end);
gst_app_src_push_buffer (GST_APP_SRC (context->src_), buf);
}
