Hi all, Attached is a very small fix for the ffmpeg plugin, to build it without compiling errors on MSVC. The ffmpeg win32 pre-built tarball is downloaded at http://ffmpeg.arrozcru.org/builds/. Tested on Windows XP SP3 and Visual Studio 9, but don't know if it still workable for Unix and Mac users. :)
Please look at the .diff files for details. I have already enjoyed the latest Chinese *big* movie "Red Cliff" with the fixed ffmpeg plugin and osgmovie. :D Wang Rui
#include "FFmpegDecoderVideo.hpp"
#include <osg/Notify>
#include <osg/Timer>
#include <stdexcept>
#include <string.h>
namespace osgFFmpeg {
FFmpegDecoderVideo::FFmpegDecoderVideo(PacketQueue & packets, FFmpegClocks &
clocks) :
m_packets(packets),
m_clocks(clocks),
m_stream(0),
m_context(0),
m_codec(0),
m_packet_data(0),
m_bytes_remaining(0),
m_packet_pts(AV_NOPTS_VALUE),
m_writeBuffer(0),
m_user_data(0),
m_publish_func(0),
m_exit(false)
#ifdef USE_SWSCALE
,m_swscale_ctx(0)
#endif
{
}
FFmpegDecoderVideo::~FFmpegDecoderVideo()
{
osg::notify(osg::INFO)<<"Destructing FFmpegDecoderVideo..."<<std::endl;
if (isRunning())
{
m_exit = true;
#if 0
while(isRunning()) { OpenThreads::YieldCurrentThread(); }
#else
join();
#endif
}
#ifdef USE_SWSCALE
if (m_swscale_ctx)
{
sws_freeContext(m_swscale_ctx);
m_swscale_ctx = 0;
}
#endif
osg::notify(osg::INFO)<<"Destructed FFmpegDecoderVideo"<<std::endl;
}
void FFmpegDecoderVideo::open(AVStream * const stream)
{
m_stream = stream;
m_context = stream->codec;
// Trust the video size given at this point
// (avcodec_open seems to sometimes return a 0x0 size)
m_width = m_context->width;
m_height = m_context->height;
findAspectRatio();
// Find out whether we support Alpha channel
m_alpha_channel = (m_context->pix_fmt == PIX_FMT_YUVA420P);
// Find out the framerate
m_frame_rate = av_q2d(stream->r_frame_rate);
// Find the decoder for the video stream
m_codec = avcodec_find_decoder(m_context->codec_id);
if (m_codec == 0)
throw std::runtime_error("avcodec_find_decoder() failed");
// Inform the codec that we can handle truncated bitstreams
//if (p_codec->capabilities & CODEC_CAP_TRUNCATED)
// m_context->flags |= CODEC_FLAG_TRUNCATED;
// Open codec
if (avcodec_open(m_context, m_codec) < 0)
throw std::runtime_error("avcodec_open() failed");
// Allocate video frame
m_frame.reset(avcodec_alloc_frame());
// Allocate converted RGB frame
m_frame_rgba.reset(avcodec_alloc_frame());
m_buffer_rgba[0].resize(avpicture_get_size(PIX_FMT_RGB32, width(),
height()));
m_buffer_rgba[1].resize(m_buffer_rgba[0].size());
// Assign appropriate parts of the buffer to image planes in m_frame_rgba
avpicture_fill((AVPicture *) (m_frame_rgba).get(), &(m_buffer_rgba[0])[0],
PIX_FMT_RGB32, width(), height());
// Override get_buffer()/release_buffer() from codec context in order to
retrieve the PTS of each frame.
m_context->opaque = this;
m_context->get_buffer = getBuffer;
m_context->release_buffer = releaseBuffer;
}
void FFmpegDecoderVideo::close(bool waitForThreadToExit)
{
m_exit = true;
if (isRunning() && waitForThreadToExit)
{
while(isRunning()) { OpenThreads::Thread::YieldCurrentThread(); }
}
}
void FFmpegDecoderVideo::run()
{
try
{
decodeLoop();
}
catch (const std::exception & error)
{
osg::notify(osg::WARN) << "FFmpegDecoderVideo::run : " << error.what()
<< std::endl;
}
catch (...)
{
osg::notify(osg::WARN) << "FFmpegDecoderVideo::run : unhandled
exception" << std::endl;
}
}
void FFmpegDecoderVideo::decodeLoop()
{
FFmpegPacket packet;
double pts;
while (! m_exit)
{
// Work on the current packet until we have decoded all of it
while (m_bytes_remaining > 0)
{
// Save global PTS to be stored in m_frame via getBuffer()
m_packet_pts = packet.packet.pts;
// Decode video frame
int frame_finished = 0;
const int bytes_decoded = avcodec_decode_video(m_context,
m_frame.get(), &frame_finished, m_packet_data, m_bytes_remaining);
if (bytes_decoded < 0)
throw std::runtime_error("avcodec_decode_video failed()");
m_bytes_remaining -= bytes_decoded;
m_packet_data += bytes_decoded;
// Find out the frame pts
if (packet.packet.dts == AV_NOPTS_VALUE && m_frame->opaque != 0 &&
*reinterpret_cast<const int64_t*>(m_frame->opaque) != AV_NOPTS_VALUE)
{
pts = *reinterpret_cast<const int64_t*>(m_frame->opaque);
}
else if (packet.packet.dts != AV_NOPTS_VALUE)
{
pts = packet.packet.dts;
}
else
{
pts = 0;
}
pts *= av_q2d(m_stream->time_base);
// Publish the frame if we have decoded a complete frame
if (frame_finished)
{
const double synched_pts =
m_clocks.videoSynchClock(m_frame.get(), av_q2d(m_stream->time_base), pts);
const double frame_delay =
m_clocks.videoRefreshSchedule(synched_pts);
publishFrame(frame_delay);
}
}
// Get the next packet
pts = 0;
if (packet.valid())
packet.clear();
bool is_empty = true;
packet = m_packets.timedPop(is_empty, 10);
if (! is_empty)
{
if (packet.type == FFmpegPacket::PACKET_DATA)
{
m_bytes_remaining = packet.packet.size;
m_packet_data = packet.packet.data;
}
else if (packet.type == FFmpegPacket::PACKET_FLUSH)
{
avcodec_flush_buffers(m_context);
m_clocks.rewindVideo();
}
}
}
}
void FFmpegDecoderVideo::findAspectRatio()
{
float ratio = 0.0f;
if (m_context->sample_aspect_ratio.num != 0)
ratio = float(av_q2d(m_context->sample_aspect_ratio));
if (ratio <= 0.0f)
ratio = 1.0f;
m_pixel_aspect_ratio = ratio;
}
int FFmpegDecoderVideo::convert(AVPicture *dst, int dst_pix_fmt, AVPicture *src,
int src_pix_fmt, int src_width, int src_height)
{
osg::Timer_t startTick = osg::Timer::instance()->tick();
#ifdef USE_SWSCALE
if (m_swscale_ctx==0)
{
m_swscale_ctx = sws_getContext(src_width, src_height, src_pix_fmt,
src_width, src_height, dst_pix_fmt,
/*SWS_BILINEAR*/ SWS_BICUBIC, NULL, NULL,
NULL);
}
osg::notify(osg::INFO)<<"Using sws_scale ";
int result = sws_scale(m_swscale_ctx,
(src->data), (src->linesize), 0, src_height,
(dst->data), (dst->linesize));
/*int result = sws_scale(m_swscale_ctx,
(const uint8_t**)(src->data), (src->linesize), 0,
src_height,
(dst->data), (dst->linesize));*/
#else
osg::notify(osg::INFO)<<"Using img_convert ";
int result = img_convert(dst, dst_pix_fmt, src,
src_pix_fmt, src_width, src_height);
#endif
osg::Timer_t endTick = osg::Timer::instance()->tick();
osg::notify(osg::INFO)<<" time =
"<<osg::Timer::instance()->delta_m(startTick,endTick)<<"ms"<<std::endl;
return result;
}
void FFmpegDecoderVideo::publishFrame(const double delay)
{
// If no publishing function, just ignore the frame
if (m_publish_func == 0)
return;
// If the display delay is too small, we better skip the frame.
if (delay < -0.010)
return;
AVPicture * const src = (AVPicture *) m_frame.get();
AVPicture * const dst = (AVPicture *) m_frame_rgba.get();
// Assign appropriate parts of the buffer to image planes in m_frame_rgba
avpicture_fill((AVPicture *) (m_frame_rgba).get(),
&(m_buffer_rgba[m_writeBuffer])[0], PIX_FMT_RGB32, width(), height());
// Convert YUVA420p (i.e. YUV420p plus alpha channel) using our own routine
if (m_context->pix_fmt == PIX_FMT_YUVA420P)
yuva420pToRgba(dst, src, width(), height());
else
convert(dst, PIX_FMT_RGB32, src, m_context->pix_fmt, width(), height());
// Wait 'delay' seconds before publishing the picture.
int i_delay = static_cast<int>(delay * 1000000 + 0.5);
while (i_delay > 1000)
{
// Avoid infinite/very long loops
if (m_exit)
return;
const int micro_delay = (std::min)(1000000, i_delay);
OpenThreads::Thread::microSleep(micro_delay);
i_delay -= micro_delay;
}
m_writeBuffer = 1-m_writeBuffer;
m_publish_func(* this, m_user_data);
}
void FFmpegDecoderVideo::yuva420pToRgba(AVPicture * const dst, AVPicture *
const src, int width, int height)
{
convert(dst, PIX_FMT_RGB32, src, m_context->pix_fmt, width, height);
const size_t bpp = 4;
uint8_t * a_dst = dst->data[0] + 3;
for (int h = 0; h < height; ++h) {
const uint8_t * a_src = src->data[3] + h * src->linesize[3];
for (int w = 0; w < width; ++w) {
*a_dst = *a_src;
a_dst += bpp;
a_src += 1;
}
}
}
int FFmpegDecoderVideo::getBuffer(AVCodecContext * const context, AVFrame *
const picture)
{
const FFmpegDecoderVideo * const this_ = reinterpret_cast<const
FFmpegDecoderVideo*>(context->opaque);
const int result = avcodec_default_get_buffer(context, picture);
int64_t * p_pts = reinterpret_cast<int64_t*>( av_malloc(sizeof(int64_t)) );
*p_pts = this_->m_packet_pts;
picture->opaque = p_pts;
return result;
}
void FFmpegDecoderVideo::releaseBuffer(AVCodecContext * const context, AVFrame
* const picture)
{
if (picture != 0)
av_freep(&picture->opaque);
avcodec_default_release_buffer(context, picture);
}
} // namespace osgFFmpeg
#ifndef HEADER_GUARD_OSGFFMPEG_FFMPEG_DECODER_VIDEO_H
#define HEADER_GUARD_OSGFFMPEG_FFMPEG_DECODER_VIDEO_H
#include "FFmpegHeaders.hpp"
#include "BoundedMessageQueue.hpp"
#include "FFmpegClocks.hpp"
#include "FFmpegPacket.hpp"
#include <OpenThreads/Thread>
#include <vector>
namespace osgFFmpeg {
class FramePtr
{
public:
typedef AVFrame T;
explicit FramePtr() : _ptr(0) {}
explicit FramePtr(T* ptr) : _ptr(ptr) {}
~FramePtr()
{
cleanup();
}
T* get() { return _ptr; }
T * operator-> () const // never throws
{
return _ptr;
}
void reset(T* ptr)
{
if (ptr==_ptr) return;
cleanup();
_ptr = ptr;
}
void cleanup()
{
if (_ptr) av_free(_ptr);
_ptr = 0;
}
protected:
T* _ptr;
};
class FFmpegDecoderVideo : public OpenThreads::Thread
{
public:
typedef BoundedMessageQueue<FFmpegPacket> PacketQueue;
typedef void (* PublishFunc) (const FFmpegDecoderVideo & decoder, void *
user_data);
FFmpegDecoderVideo(PacketQueue & packets, FFmpegClocks & clocks);
~FFmpegDecoderVideo();
void open(AVStream * stream);
void close(bool waitForThreadToExit);
virtual void run();
void setUserData(void * user_data);
void setPublishCallback(PublishFunc function);
int width() const;
int height() const;
float pixelAspectRatio() const;
bool alphaChannel() const;
double frameRate() const;
const uint8_t * image() const;
private:
typedef std::vector<uint8_t> Buffer;
void decodeLoop();
void findAspectRatio();
void publishFrame(double delay);
double synchronizeVideo(double pts);
void yuva420pToRgba(AVPicture *dst, AVPicture *src, int width, int height);
int convert(AVPicture *dst, int dst_pix_fmt, AVPicture *src,
int src_pix_fmt, int src_width, int src_height);
static int getBuffer(AVCodecContext * context, AVFrame * picture);
static void releaseBuffer(AVCodecContext * context, AVFrame * picture);
PacketQueue & m_packets;
FFmpegClocks & m_clocks;
AVStream * m_stream;
AVCodecContext * m_context;
AVCodec * m_codec;
const uint8_t * m_packet_data;
int m_bytes_remaining;
int64_t m_packet_pts;
FramePtr m_frame;
FramePtr m_frame_rgba;
Buffer m_buffer_rgba[2];
int m_writeBuffer;
void * m_user_data;
PublishFunc m_publish_func;
double m_frame_rate;
float m_pixel_aspect_ratio;
int m_width;
int m_height;
size_t m_next_frame_index;
bool m_alpha_channel;
volatile bool m_exit;
#ifdef USE_SWSCALE
struct SwsContext * m_swscale_ctx;
#endif
};
inline void FFmpegDecoderVideo::setUserData(void * const user_data)
{
m_user_data = user_data;
}
inline void FFmpegDecoderVideo::setPublishCallback(const PublishFunc function)
{
m_publish_func = function;
}
inline int FFmpegDecoderVideo::width() const
{
return m_width;
}
inline int FFmpegDecoderVideo::height() const
{
return m_height;
}
inline float FFmpegDecoderVideo::pixelAspectRatio() const
{
return m_pixel_aspect_ratio;
}
inline bool FFmpegDecoderVideo::alphaChannel() const
{
return m_alpha_channel;
}
inline double FFmpegDecoderVideo::frameRate() const
{
return m_frame_rate;
}
inline const uint8_t * FFmpegDecoderVideo::image() const
{
return &((m_buffer_rgba[1-m_writeBuffer])[0]);
}
} // namespace osgFFmpeg
#endif // HEADER_GUARD_OSGFFMPEG_FFMPEG_DECODER_VIDEO_H
FFmpegDecoderVideo.cpp.diff
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FFmpegDecoderVideo.hpp.diff
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