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/*
Copyright (C) (2004) (Cort Stratton) <cort at cortstratton dot 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "revel.h"
#include "BaseEncoder.h"
#include "XvidEncoder.h"
#include <cassert>
#include <cstdio>
#include <string>
using std::string;
#include <map>
using std::map;
namespace
{
typedef map<int,Revel_BaseEncoder*> EncoderMap;
typedef EncoderMap::iterator EncoderMapItor;
EncoderMap g_encoders;
int g_nextHandle = 0;
bool IsEncoderValid(const int handle)
{
EncoderMapItor itor = g_encoders.find(handle);
if (itor == g_encoders.end())
return false;
return true;
}
Revel_Error EncoderFactory(const Revel_VideoCodec codec,
Revel_BaseEncoder **encoderOut)
{
Revel_BaseEncoder *enc = NULL;
switch(codec)
{
case REVEL_CD_XVID:
enc = new Revel_XvidEncoder;
break;
default:
return REVEL_ERR_PARAMS;
}
if (enc == NULL)
return REVEL_ERR_MEMORY;
*encoderOut = enc;
return REVEL_ERR_NONE;
}
}
int Revel_GetVersion(void)
{
return REVEL_VERSION;
}
int Revel_GetApiVersion(void)
{
return REVEL_API_VERSION;
}
Revel_Error Revel_CreateEncoder(int *encoderHandle)
{
if (encoderHandle == NULL)
return REVEL_ERR_PARAMS;
*encoderHandle = g_nextHandle++;
g_encoders[*encoderHandle] = NULL;
return REVEL_ERR_NONE;
}
void Revel_InitializeParams(Revel_Params *params)
{
if (params == NULL)
return;
params->width = params->height = 1;
params->hasAudio = 0;
params->audioBits = 16;
params->audioChannels = 2;
params->audioRate = 44100;
params->audioSampleFormat = REVEL_ASF_UNKNOWN;
params->codec = REVEL_CD_XVID;
params->frameRate = 30;
params->quality = 1.0f;
}
Revel_Error Revel_EncodeStart(int encoderHandle, const char* filename,
Revel_Params *params)
{
if (filename == NULL || params == NULL)
return REVEL_ERR_PARAMS;
if (!IsEncoderValid(encoderHandle))
return REVEL_ERR_INVALID_HANDLE;
// Create the codec-specific encoder if it doesn't already exist.
if (g_encoders[encoderHandle] == NULL)
{
Revel_BaseEncoder *newEnc = NULL;
Revel_Error revError = EncoderFactory(params->codec, &newEnc);
if (revError != REVEL_ERR_NONE)
return revError;
g_encoders[encoderHandle] = newEnc;
}
return g_encoders[encoderHandle]->EncodeStart(filename, *params);
}
Revel_Error Revel_EncodeFrame(int encoderHandle,
Revel_VideoFrame *frame, int *frameSize)
{
if (frame == NULL)
return REVEL_ERR_PARAMS;
if (!IsEncoderValid(encoderHandle))
return REVEL_ERR_INVALID_HANDLE;
if (g_encoders[encoderHandle] == NULL)
return REVEL_ERR_BUSY;
return g_encoders[encoderHandle]->EncodeFrame(*frame, frameSize);
}
Revel_Error Revel_EncodeAudio(int encoderHandle, void *sampleBuffer,
int numBytes, int *numTotalBytes)
{
if (!IsEncoderValid(encoderHandle))
return REVEL_ERR_INVALID_HANDLE;
if (g_encoders[encoderHandle] == NULL)
return REVEL_ERR_BUSY;
return g_encoders[encoderHandle]->EncodeAudio(sampleBuffer, numBytes,
numTotalBytes);
}
Revel_Error Revel_EncodeEnd(int encoderHandle, int *totalSize)
{
if (!IsEncoderValid(encoderHandle))
return REVEL_ERR_INVALID_HANDLE;
if (g_encoders[encoderHandle] == NULL)
return REVEL_ERR_BUSY;
return g_encoders[encoderHandle]->EncodeEnd(totalSize);
}
Revel_Error Revel_DestroyEncoder(int encoderHandle)
{
if (!IsEncoderValid(encoderHandle))
return REVEL_ERR_NONE; // okay to delete invalid handles.
// Delete the encoder, if there is one.
if (g_encoders[encoderHandle] != NULL)
{
delete g_encoders[encoderHandle];
g_encoders[encoderHandle] = NULL;
}
// Finally, remove the map entry.
g_encoders.erase(encoderHandle);
return REVEL_ERR_NONE;
}
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