root/avi2swf/videoreader_avifile.cc
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DEFINITIONS
This source file includes following definitions.
- readSamples
- videoreader_avifile_getsamples
- videoreader_avifile_getimage
- videoreader_avifile_close
- videoreader_avifile_setparameter
- videoreader_avifile_open
- videoreader_avifile_open
/* videoreader_avifile.cc
Read avi files using the avifile library.
Part of the swftools package.
Copyright (c) 2001,2002,2003 Matthias Kramm <kramm@quiss.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include "../config.h"
#include "videoreader.h"
#ifdef HAVE_AVIFILE
#undef HAVE_CONFIG_H
#ifdef HAVE_VERSION_H
#include <version.h>
#endif
#ifdef HAVE_AVIFILE_VERSION_H
#include <avifile/version.h>
#endif
#if (AVIFILE_MAJOR_VERSION == 0) && (AVIFILE_MINOR_VERSION>=6)
#include <avifile.h>
#include <aviplay.h>
#include <avm_fourcc.h>
#include <avm_creators.h>
#include <StreamInfo.h>
#define VERSION6
#else
#include <avifile.h>
#include <aviplay.h>
#include <aviutil.h>
#define Width width
#define Height height
#define Data data
#define Bpp bpp
#endif
#ifdef HAVE_SIGNAL_H
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#include <signal.h>
#define DO_SIGNALS
#endif
#endif
#include "../lib/q.h"
static int verbose = 0;
typedef struct _videoreader_avifile_internal
{
IAviReadFile* player;
IAviReadStream* astream;
IAviReadStream* vstream;
int do_audio;
int do_video;
int video_eof;
int audio_eof;
int flip;
int frame;
int soundbits;
ringbuffer_t audio_buffer;
} videoreader_avifile_internal;
static int readSamples(videoreader_avifile_internal*i, void*buffer, int buffer_size, int numsamples)
{
int ret;
while(i->audio_buffer.available < buffer_size) {
unsigned int samples_read = 0, bytes_read = 0;
ret = i->astream->ReadFrames(buffer, buffer_size, numsamples, samples_read, bytes_read);
if(ret!=0) {
if(verbose) {
printf("ReadFrames() returns %d\n", ret);fflush(stdout);
}
}
if(samples_read<=0) {
int l = i->audio_buffer.available;
ringbuffer_read(&i->audio_buffer, buffer, l);
return l;
}
ringbuffer_put(&i->audio_buffer, buffer, bytes_read);
}
ringbuffer_read(&i->audio_buffer, buffer, buffer_size);
return buffer_size;
}
static int videoreader_avifile_getsamples(videoreader_t* v, void*buffer, int num)
{
videoreader_avifile_internal*i = (videoreader_avifile_internal*)v->internal;
if(verbose) {
printf("videoreader_getsamples(%d)\n", num);fflush(stdout);
}
if(i->audio_eof)
return 0;
if(i->soundbits == 8) {
int num_read = readSamples(i, buffer, num/2, num/(v->channels*2))*2;
unsigned char*b = (unsigned char*)buffer;
int t;
for(t=num_read-2;t>=0;t-=2) {
unsigned char x = b[t/2];
b[t] = 0;
b[t+1] = x-128;
}
if(!num_read) {
if(verbose) {
printf("end of audio\n");fflush(stdout);
}
i->audio_eof=1;
}
return num_read;
}
if(i->soundbits == 16) {
int num_read = readSamples(i, buffer, num, num/(v->channels*2));
if(!num_read) {
if(verbose) {
printf("end of audio\n");fflush(stdout);
}
i->audio_eof=1;
}
return num_read;
}
return 0;
}
static int videoreader_avifile_getimage(videoreader_t* v, void*buffer)
{
videoreader_avifile_internal*i = (videoreader_avifile_internal*)v->internal;
if(verbose) {
printf("videoreader_getimage()\n");fflush(stdout);
}
if(i->video_eof)
return 0;
if(i->vstream->ReadFrame() < 0) {
if(verbose) printf("vstream->ReadFrame() returned value < 0, shutting down...\n");
i->video_eof = 1;
return 0;
}
CImage*img2 = 0;
CImage*img = i->vstream->GetFrame();
if(!img) {
if(verbose) printf("vstream->GetFrame() returned NULL, shutting down...\n");
i->video_eof = 1;
return 0;
}
/* we convert the image to YUV first, because we can convert to RGB from YUV only */
img->ToYUV();
img->ToRGB();
if(img->Bpp() != 3) {
if(verbose) printf("Warning: converthing from bpp %d to bpp 3, this fails on older avifile versions...\n", img->Bpp());
BitmapInfo tmp(v->width, v->height, 24);
img2 = new CImage(img, &tmp);
img = img2;
}
v->frame++;
i->frame++;
unsigned char*data = img->Data();
int bpp = img->Bpp();
if(bpp == 3) {
int x,y;
for(y=0;y<v->height;y++) {
unsigned char*from,*to;
to = &((unsigned char*)buffer)[y*v->width*4];
if(i->flip)
from = img->At(v->height-y-1);
else
from = img->At(y);
for(x=0;x<v->width;x++) {
to[x*4+0] = 0;
to[x*4+1] = from[x*3+2];
to[x*4+2] = from[x*3+1];
to[x*4+3] = from[x*3+0];
}
}
if(img2) delete img2;
return v->width*v->height*4;
} else {
if(img2) delete img2;
if(verbose) printf("Can't handle bpp %d, shutting down...\n", bpp);
i->video_eof = 1;
return 0;
}
}
static void videoreader_avifile_close(videoreader_t* v)
{
videoreader_avifile_internal*i = (videoreader_avifile_internal*)v->internal;
if(verbose) {
printf("videoreader_close()\n");fflush(stdout);
}
if(i->do_audio) {
ringbuffer_clear(&i->audio_buffer);
}
}
static void videoreader_avifile_setparameter(videoreader_t*v, char*name, char*value)
{
videoreader_avifile_internal*i = (videoreader_avifile_internal*)v->internal;
if(!strcmp(name, "verbose")) {
verbose = atoi(value);
}
if(!strcmp(name, "flip")) {
i->flip = atoi(value);
}
if(verbose) {
printf("videoreader_setparameter(%s, %s)\n", name, value);fflush(stdout);
}
}
int videoreader_avifile_open(videoreader_t* v, char* filename)
{
if(!filename) {
/* codec query */
return 0;
}
videoreader_avifile_internal* i;
i = (videoreader_avifile_internal*)malloc(sizeof(videoreader_avifile_internal));
memset(i, 0, sizeof(videoreader_avifile_internal));
memset(v, 0, sizeof(videoreader_t));
v->getsamples = videoreader_avifile_getsamples;
v->close = videoreader_avifile_close;
v->getimage = videoreader_avifile_getimage;
v->getsamples = videoreader_avifile_getsamples;
v->setparameter = videoreader_avifile_setparameter;
v->internal = i;
v->frame = 0;
i->do_video = 1;
i->do_audio = 1;
i->player = CreateIAviReadFile(filename);
if(verbose) {
printf("%d streams (%d video, %d audio)\n",
i->player->StreamCount(),
i->player->VideoStreamCount(),
i->player->AudioStreamCount());
}
i->astream = i->player->GetStream(0, AviStream::Audio);
i->vstream = i->player->GetStream(0, AviStream::Video);
if(!i->vstream) {
printf("Couldn't open video stream\n");
i->do_video = 0;
}
if(!i->astream) {
printf("Couldn't open video stream\n");
i->do_audio = 0;
}
#ifdef NO_MP3
if(i->do_audio) {
printf(stderr, "MP3 support has been disabled at compile time, not converting soundtrack");
i->do_audio = 0;
}
#endif
if(!i->do_video && !i->do_audio) {
printf("File has neither audio nor video streams.(?)\n");
return -1;
}
#ifndef VERSION6
MainAVIHeader head;
int dwMicroSecPerFrame = 0;
player->GetFileHeader(&head);
printf("fps: %d\n", 1000000/head.dwMicroSecPerFrame);
printf("frames: %d\n", head.dwTotalFrames);
printf("streams: %d\n", head.dwStreams);
printf("width: %d\n", abs(head.dwWidth));
printf("height: %d\n", abs(head.dwHeight));
printf("sound: %u samples (%f seconds)\n", i->astream->GetEndPos(), i->astream->GetEndTime());
v->width = abs(head.dwWidth);
v->height = abs(head.dwHeight);
dwMicroSecPerFrame = head.dwMicroSecPerFrame;
samplesperframe = astream->GetEndPos()/astream->GetEndTime()*head.dwMicroSecPerFrame/1000000;
v->samplerate = (int)(astream->GetEndPos()/astream->GetEndTime());
v->fps = 1000000.0/dwMicroSecPerFrame;
i->soundbits = 16;
#else
if(i->do_video)
{
StreamInfo*videoinfo;
videoinfo = i->vstream->GetStreamInfo();
v->width = abs(videoinfo->GetVideoWidth());
v->height = abs(videoinfo->GetVideoHeight());
v->fps = (double)(videoinfo->GetFps());
}
if(i->do_audio)
{
WAVEFORMATEX wave;
StreamInfo*audioinfo;
i->astream->GetAudioFormatInfo(&wave,0);
audioinfo = i->astream->GetStreamInfo();
v->channels = wave.nChannels;
v->samplerate = wave.nSamplesPerSec;
i->soundbits = wave.wBitsPerSample;
if(v->channels==0 || v->samplerate==0 || i->soundbits==0 || wave.wFormatTag!=1) {
v->samplerate = audioinfo->GetAudioSamplesPerSec();
v->channels = audioinfo->GetAudioChannels();
i->soundbits = audioinfo->GetAudioBitsPerSample();
}
if(verbose) {
printf("formatinfo: format %d, %d channels, %d bits/sample, rate %d, blockalign %d\n", wave.wFormatTag, wave.nChannels, wave.wBitsPerSample, wave.nSamplesPerSec, wave.nBlockAlign);
printf("audioinfo: %d channels, %d bits/sample, rate %d\n", audioinfo->GetAudioChannels(), audioinfo->GetAudioBitsPerSample(), audioinfo->GetAudioSamplesPerSec());
}
if(i->soundbits != 8 && i->soundbits != 16) {
printf("Can't handle %d bit audio, disabling sound\n", wave.wBitsPerSample);
i->do_audio = 0;
i->soundbits = 0;
v->channels = 0;
v->samplerate = 0;
}
}
#endif
i->vstream -> StartStreaming();
if(i->do_audio) {
i->astream -> StartStreaming();
ringbuffer_init(&i->audio_buffer);
#ifdef VERSION6
WAVEFORMATEX wave;
i->astream -> GetOutputFormat(&wave, sizeof(wave));
printf("formatinfo: format %d, %d channels, %d bits/sample, rate %d, blockalign %d\n", wave.wFormatTag, wave.nChannels, wave.wBitsPerSample, wave.nSamplesPerSec, wave.nBlockAlign);
#endif
}
return 0;
}
#else //HAVE_AVIFILE
int videoreader_avifile_open(videoreader_t* v, char* filename)
{
return -1;
}
#endif //HAVE_AVIFILE