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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2000, 2001. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie dmackie@cisco.com
* Bill May wmay@cisco.com
*
* Adapted for PD/PDP by Yves Degoyon (ydegoyon@free.fr)
*/
#ifndef debug_message
#define debug_message post
#endif
#include <sys/mman.h>
#include "m_pd.h"
#include "pdp_mp4videosource.h"
#include "video_util_rgb.h"
//#define DEBUG_TIMESTAMPS 1
int CPDPVideoSource::ThreadMain(void)
{
// just a stub, the threaded mode is not used ( never called )
return 0;
}
void CPDPVideoSource::DoStart(void)
{
if (m_source) return;
if (!Init()) return;
m_source = true;
}
void CPDPVideoSource::DoStop(void)
{
if (!m_source) return;
DoStopVideo();
m_source = false;
}
bool CPDPVideoSource::Init(void)
{
if (m_pConfig->GetIntegerValue(CONFIG_VIDEO_SIGNAL) == VIDEO_SIGNAL_NTSC)
{
m_videoSrcFrameRate = VIDEO_NTSC_FRAME_RATE;
}
else
{
m_videoSrcFrameRate = VIDEO_PAL_FRAME_RATE;
}
m_videoMbuf.frames = 2;
m_cacheTimestamp = false;
m_videoFrameMap = (struct video_mmap*) malloc(m_videoMbuf.frames * sizeof(struct video_mmap));
if ( !m_videoFrameMap )
{
post("pdp_mp4live~ : video source init : failed to allocate enough memory");
return false;
}
m_videoFrameMapFrame = (uint64_t *)malloc(m_videoMbuf.frames * sizeof(uint64_t));
m_videoFrameMapTimestamp = (uint64_t *)malloc(m_videoMbuf.frames * sizeof(Timestamp));
m_captureHead = 0;
m_encodeHead = -1;
m_videoFrames = 0;
m_videoSrcFrameDuration = (Duration)(((float)TimestampTicks / m_videoSrcFrameRate) + 0.5);
for (int i = 0; i < m_videoMbuf.frames; i++)
{
// initialize frame map
m_videoFrameMap[i].frame = i;
m_videoFrameMap[i].width = m_pConfig->GetIntegerValue(CONFIG_VIDEO_RAW_WIDTH);
m_videoFrameMap[i].height = m_pConfig->GetIntegerValue(CONFIG_VIDEO_RAW_HEIGHT);
m_videoFrameMap[i].format = VIDEO_PALETTE_YUV420P;
if (i == 0)
{
m_videoCaptureStartTimestamp = GetTimestamp();
}
m_lastVideoFrameMapFrameLoaded = m_videoFrameMapFrame[i] = i;
m_lastVideoFrameMapTimestampLoaded =
m_videoFrameMapTimestamp[i] = CalculateVideoTimestampFromFrames(i);
}
m_pConfig->CalculateVideoFrameSize();
InitVideo(
(m_pConfig->m_videoNeedRgbToYuv ?
RGBVIDEOFRAME :
YUVVIDEOFRAME),
true);
SetVideoSrcSize(
m_pConfig->GetIntegerValue(CONFIG_VIDEO_RAW_WIDTH),
m_pConfig->GetIntegerValue(CONFIG_VIDEO_RAW_HEIGHT),
m_pConfig->GetIntegerValue(CONFIG_VIDEO_RAW_WIDTH),
true);
m_maxPasses = (u_int8_t)(m_videoSrcFrameRate + 0.5);
return true;
}
int8_t CPDPVideoSource::StartTimeStamp(Timestamp &frameTimestamp)
{
if (m_cacheTimestamp)
frameTimestamp = m_videoFrameMapTimestamp[m_captureHead];
else
frameTimestamp = GetTimestamp();
int8_t capturedFrame = m_captureHead;
m_captureHead = (m_captureHead + 1) % m_videoMbuf.frames;
return capturedFrame;
}
bool CPDPVideoSource::EndTimeStamp(int8_t frameNumber)
{
Timestamp calc = GetTimestamp();
if (calc > m_videoSrcFrameDuration + m_lastVideoFrameMapTimestampLoaded) {
#ifdef DEBUG_TIMESTAMPS
debug_message("pdp_mp4live~ : video frame delay past end of buffer - time is %llu should be %llu",
calc,
m_videoSrcFrameDuration + m_lastVideoFrameMapTimestampLoaded);
#endif
m_videoCaptureStartTimestamp = calc;
m_videoFrameMapFrame[frameNumber] = 0;
m_videoFrameMapTimestamp[frameNumber] = calc;
} else {
m_videoFrameMapFrame[frameNumber] = m_lastVideoFrameMapFrameLoaded + 1;
m_videoFrameMapTimestamp[frameNumber] =
CalculateVideoTimestampFromFrames(m_videoFrameMapFrame[frameNumber]);
}
m_lastVideoFrameMapFrameLoaded = m_videoFrameMapFrame[frameNumber];
m_lastVideoFrameMapTimestampLoaded = m_videoFrameMapTimestamp[frameNumber];
return true;
}
void CPDPVideoSource::ProcessVideo(u_int8_t *pY, u_int8_t *pU, u_int8_t *pV)
{
// for efficiency, process ~1 second before returning to check for commands
Timestamp frameTimestamp;
for (int pass = 0; pass < m_maxPasses; pass++) {
// get next frame from video capture device
m_encodeHead = StartTimeStamp(frameTimestamp);
if (m_encodeHead == -1) {
continue;
}
ProcessVideoYUVFrame(
pY,
pU,
pV,
m_videoSrcWidth,
m_videoSrcWidth >> 1,
frameTimestamp);
// release video frame buffer back to video capture device
if (EndTimeStamp(m_encodeHead)) {
m_encodeHead = (m_encodeHead + 1) % m_videoMbuf.frames;
} else {
debug_message("pdp_mp4live~ : couldn't release capture buffer!");
}
}
}
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