You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
285 lines
8.5 KiB
285 lines
8.5 KiB
//
|
|
// C++ Implementation: k9avidecode
|
|
//
|
|
// Description:
|
|
//
|
|
//
|
|
// Author: Jean-Michel PETIT <k9copy@free.fr>, (C) 2007
|
|
//
|
|
// Copyright: See COPYING file that comes with this distribution
|
|
//
|
|
//
|
|
#include "k9avidecode.h"
|
|
|
|
#ifdef OLD_FFMPEG
|
|
#include <ffmpeg/avcodec.h>
|
|
#endif
|
|
#ifdef NEW_FFMPEG
|
|
#include <libavcodec/avcodec.h>
|
|
#include <libavformat/avformat.h>
|
|
#endif
|
|
|
|
// This is probably the incorrect revision for when CODEC_TYPE_VIDEO was removed
|
|
// Please update the comparison below if you know the exact revision that CODEC_TYPE_VIDEO was removed in!
|
|
#if LIBAVCODEC_VERSION_INT < (AV_VERSION_INT(52,72,2))
|
|
#define AVMEDIA_TYPE_VIDEO CODEC_TYPE_VIDEO
|
|
#endif
|
|
|
|
#include <tqimage.h>
|
|
#include <dlfcn.h>
|
|
#include <klocale.h>
|
|
#include <cstdlib>
|
|
#include "ac.h"
|
|
|
|
void *CodecHandle=0;
|
|
void *FormatHandle=0;
|
|
int glibref=0;
|
|
|
|
#ifdef NEW_FFMPEG
|
|
#ifdef NEEDS_AV_FREE_PACKET
|
|
void av_free_packet(AVPacket *pkt)
|
|
{
|
|
if (pkt) {
|
|
if (pkt->destruct) pkt->destruct(pkt);
|
|
pkt->data = NULL; pkt->size = 0;
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
|
|
: TQObject(parent, name) {
|
|
if (glibref==0) {
|
|
CodecHandle=dlopen("libavcodec.so",RTLD_LAZY | RTLD_GLOBAL);
|
|
FormatHandle=dlopen("libavformat.so",RTLD_LAZY | RTLD_GLOBAL);
|
|
}
|
|
if (!CodecHandle) {
|
|
m_error =i18n("Cannot open then library %1").tqarg("libavcodec");
|
|
return;
|
|
}
|
|
if (!FormatHandle) {
|
|
m_error =i18n("Cannot open then library %1").tqarg("libavformat");
|
|
return;
|
|
}
|
|
m_error="";
|
|
av_register_all = (av_register_all_t)dlsym(FormatHandle,"av_register_all");
|
|
av_open_input_file = (av_open_input_file_t)dlsym(FormatHandle,"av_open_input_file");
|
|
av_find_stream_info = (av_find_stream_info_t)dlsym(FormatHandle,"av_find_stream_info");
|
|
avcodec_find_decoder =(avcodec_find_decoder_t) dlsym(CodecHandle,"avcodec_find_decoder");
|
|
avcodec_open = (avcodec_open_t)dlsym(CodecHandle,"avcodec_open");
|
|
avcodec_alloc_frame = (avcodec_alloc_frame_t)dlsym(CodecHandle,"avcodec_alloc_frame");
|
|
avpicture_get_size = (avpicture_get_size_t)dlsym(CodecHandle,"avpicture_get_size");
|
|
av_malloc = (av_malloc_t)dlsym(CodecHandle,"av_malloc");
|
|
avpicture_fill = (avpicture_fill_t)dlsym(CodecHandle,"avpicture_fill");
|
|
av_read_frame = (av_read_frame_t)dlsym(FormatHandle,"av_read_frame");
|
|
avcodec_decode_video = (avcodec_decode_video_t)dlsym(CodecHandle,"avcodec_decode_video");
|
|
img_convert = (img_convert_t)dlsym(CodecHandle,"img_convert");
|
|
av_free = (av_free_t)dlsym(CodecHandle,"av_free");
|
|
avcodec_close = (avcodec_close_t)dlsym(FormatHandle,"avcodec_close");
|
|
av_close_input_file = (av_close_input_file_t)dlsym(FormatHandle,"av_close_input_file");
|
|
av_seek_frame=(av_seek_frame_t)dlsym(FormatHandle,"av_seek_frame");
|
|
av_rescale_q=(av_rescale_q_t)dlsym(FormatHandle,"av_rescale_q");
|
|
avcodec_flush_buffers=(avcodec_flush_buffers_t)dlsym(CodecHandle,"avcodec_flush_buffers");
|
|
|
|
av_gettime=(av_gettime_t)dlsym(FormatHandle,"av_gettime");
|
|
av_register_all();
|
|
m_opened=false;
|
|
|
|
glibref++;
|
|
}
|
|
|
|
|
|
k9AviDecode::~k9AviDecode() {
|
|
if (m_opened)
|
|
close();
|
|
glibref--;
|
|
if (glibref==0) {
|
|
dlclose(FormatHandle);
|
|
dlclose(CodecHandle);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
#include "k9avidecode.moc"
|
|
|
|
|
|
bool k9AviDecode::open(const TQString & _fileName) {
|
|
m_error="";
|
|
if (m_opened)
|
|
close();
|
|
|
|
// Open video file
|
|
if (av_open_input_file(&m_FormatCtx, _fileName.utf8(), NULL, 0, NULL)!=0) {
|
|
m_error=i18n("Couldn't open the file %1").tqarg(_fileName);
|
|
return false; // Couldn't open file}
|
|
}
|
|
// Retrieve stream information
|
|
if (av_find_stream_info(m_FormatCtx)<0) {
|
|
m_error =i18n("Couldn't find stream information");
|
|
return false; // Couldn't find stream information
|
|
}
|
|
int i;
|
|
|
|
// Find the first video stream
|
|
m_videoStream=-1;
|
|
for (i=0; i<m_FormatCtx->nb_streams; i++)
|
|
if (m_FormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
|
|
m_videoStream=i;
|
|
break;
|
|
}
|
|
if (m_videoStream==-1) {
|
|
m_error=i18n("The file doesn't contain any video stream");
|
|
return false; // Didn't find a video stream
|
|
}
|
|
|
|
// Get a pointer to the codec context for the video stream
|
|
m_CodecCtx=m_FormatCtx->streams[m_videoStream]->codec;
|
|
|
|
|
|
// Find the decoder for the video stream
|
|
m_Codec=avcodec_find_decoder(m_CodecCtx->codec_id);
|
|
if (m_Codec==NULL) {
|
|
m_error=i18n("Unsupported codec");
|
|
return false; // Codec not found
|
|
}
|
|
// Open codec
|
|
if (avcodec_open(m_CodecCtx, m_Codec)<0) {
|
|
m_error =i18n("Could'nt open the codec");
|
|
return false; // Could not open codec
|
|
}
|
|
|
|
|
|
// Allocate video frame
|
|
m_Frame=avcodec_alloc_frame();
|
|
|
|
// Allocate an AVFrame structure
|
|
m_FrameRGB=avcodec_alloc_frame();
|
|
if (m_FrameRGB==NULL) {
|
|
m_error =i18n ("Unable to allocate memory for frames");
|
|
return false;
|
|
}
|
|
|
|
|
|
int numBytes;
|
|
// Determine required buffer size and allocate buffer
|
|
numBytes=avpicture_get_size(PIX_FMT_RGB24, m_CodecCtx->width,
|
|
m_CodecCtx->height);
|
|
m_buffer=(uint8_t *)av_malloc(numBytes*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_FrameRGB, m_buffer, PIX_FMT_RGB24,
|
|
m_CodecCtx->width, m_CodecCtx->height);
|
|
|
|
m_duration=(double)m_FormatCtx->duration / AV_TIME_BASE;
|
|
m_opened=true;
|
|
m_fileName=_fileName;
|
|
return true;
|
|
}
|
|
|
|
void k9AviDecode::seek(double _seconds) {
|
|
AVRational time_base = m_FormatCtx->streams[m_videoStream]->time_base;
|
|
int64_t fspos = (int64_t)(_seconds * AV_TIME_BASE);
|
|
fspos=av_rescale_q(fspos, AV_TIME_BASE_Q, time_base);
|
|
int i=av_seek_frame(m_FormatCtx, m_videoStream, fspos, AVSEEK_FLAG_BACKWARD );
|
|
double pos=av_gettime() / 1000000;
|
|
}
|
|
|
|
void k9AviDecode::readFrame(double _seconds) {
|
|
AVRational time_base = m_FormatCtx->streams[m_videoStream]->time_base;
|
|
int64_t fspos = (int64_t)(_seconds * AV_TIME_BASE);
|
|
fspos=av_rescale_q(fspos, AV_TIME_BASE_Q, time_base);
|
|
int res=av_seek_frame(m_FormatCtx, m_videoStream, fspos, AVSEEK_FLAG_BACKWARD );
|
|
avcodec_flush_buffers(m_CodecCtx);
|
|
int frameFinished=0;
|
|
AVPacket packet;
|
|
|
|
bool bFound=false;
|
|
while (av_read_frame(m_FormatCtx, &packet)>=0 && !bFound) {
|
|
// Is this a packet from the video stream?
|
|
if (packet.stream_index==m_videoStream) {
|
|
// Decode video frame
|
|
avcodec_decode_video(m_CodecCtx, m_Frame, &frameFinished,
|
|
packet.data, packet.size);
|
|
|
|
// Did we get a video frame?
|
|
if (frameFinished) {
|
|
// if (m_Frame->pts >=fspos)
|
|
int64_t cur_dts=fspos;
|
|
if (m_FormatCtx->cur_st)
|
|
cur_dts= m_FormatCtx->cur_st->cur_dts;
|
|
if (cur_dts >=fspos) {
|
|
bFound=true;
|
|
// Convert the image from its native format to RGB
|
|
img_convert((AVPicture *)m_FrameRGB, PIX_FMT_RGB24,
|
|
(AVPicture*)m_Frame, m_CodecCtx->pix_fmt,
|
|
m_CodecCtx->width, m_CodecCtx->height);
|
|
|
|
// convert frame to TQImage
|
|
SaveFrame(m_FrameRGB, m_CodecCtx->width,
|
|
m_CodecCtx->height);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Free the packet that was allocated by av_read_frame
|
|
av_free_packet(&packet);
|
|
}
|
|
|
|
}
|
|
|
|
void k9AviDecode::SaveFrame(AVFrame *pFrame, int width, int height) {
|
|
TQImage pix;
|
|
int len =(int) (3*width*height);
|
|
char c[255];
|
|
// Write header
|
|
sprintf(c,"P6\n%d %d\n255\n", width, height);
|
|
char *s= (char*) malloc(len+strlen(c));
|
|
tc_memcpy(s,c,strlen(c));
|
|
tc_memcpy(s+strlen(c),pFrame->data[0], len);
|
|
pix.loadFromData((uchar*)s,strlen(c)+len);
|
|
free(s);
|
|
emit drawFrame( &pix);
|
|
|
|
}
|
|
|
|
void k9AviDecode::close() {
|
|
if (m_opened) {
|
|
// Free the RGB image
|
|
av_free(m_buffer);
|
|
av_free(m_FrameRGB);
|
|
|
|
// Free the YUV frame
|
|
av_free(m_Frame);
|
|
|
|
// Close the codec
|
|
avcodec_close(m_CodecCtx);
|
|
|
|
// Close the video file
|
|
av_close_input_file(m_FormatCtx);
|
|
m_opened=false;
|
|
}
|
|
}
|
|
|
|
|
|
double k9AviDecode::getDuration() const {
|
|
return m_duration;
|
|
}
|
|
|
|
|
|
bool k9AviDecode::opened() const {
|
|
return m_opened;
|
|
}
|
|
|
|
|
|
TQString k9AviDecode::getFileName() const {
|
|
return m_fileName;
|
|
}
|
|
|
|
|
|
TQString k9AviDecode::getError() const {
|
|
return m_error;
|
|
}
|