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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 "BaseEncoder.h"
#include <cstring>
using std::string;
Revel_BaseEncoder::Revel_BaseEncoder(void)
{
m_frameBuffer = NULL;
m_outFile = NULL;
Reset();
}
Revel_BaseEncoder::~Revel_BaseEncoder(void)
{
if (m_isEncoding)
EncodeEnd();
Reset();
}
void Revel_BaseEncoder::Reset(void)
{
if (m_frameBuffer != NULL)
{
delete [] m_frameBuffer;
m_frameBuffer = NULL;
}
if (m_outFile != NULL)
{
AVI_close(m_outFile);
m_outFile = NULL;
}
m_outFilename = "";
memset(&m_params, 0, sizeof(Revel_Params));
m_totalOutBytes = 0;
m_isEncoding = false;
}
Revel_Error Revel_BaseEncoder::EncodeStart(const string& filename,
const Revel_Params& params)
{
if (m_isEncoding)
return REVEL_ERR_BUSY;
// check args
if (params.width == 0 || params.height == 0)
{
Reset();
return REVEL_ERR_PARAMS;
}
m_params = params;
// Create output file
m_outFile = AVI_open_output_file(const_cast<char*>(filename.c_str()));
if (m_outFile == NULL)
{
Reset();
return REVEL_ERR_FILE;
}
AVI_set_video(m_outFile, params.width, params.height, params.frameRate, "xvid");
if (params.hasAudio == 1)
{
// Sanity-check the audio settings first, since there's a good chance
// the caller will leave all these fields uninitialized when updating
// from Revel 1.0.x.
if (params.audioBits < 0 || params.audioBits > 256 ||
params.audioChannels < 0 || params.audioChannels > 256 ||
params.audioRate < 0)
{
Reset();
return REVEL_ERR_PARAMS;
}
AVI_set_audio(m_outFile, params.audioChannels, params.audioRate,
params.audioBits, params.audioSampleFormat);
}
else
{
AVI_set_audio(m_outFile, 0, 44100, 16, WAVE_FORMAT_UNKNOWN);
}
// Allocate frame buffer
m_frameBuffer = new char[params.width*params.height*4];
if (m_frameBuffer == NULL)
{
Reset();
return REVEL_ERR_MEMORY;
}
m_outFilename = filename;
m_totalOutBytes = 0;
m_isEncoding = true;
return REVEL_ERR_NONE;
}
Revel_Error Revel_BaseEncoder::EncodeFrame(const Revel_VideoFrame& frame,
int *frameSize)
{
// Make sure it's safe to be encoding.
if (!m_isEncoding)
return REVEL_ERR_BUSY;
// Check args
if (frame.width != m_params.width ||
frame.height != m_params.height ||
(frame.pixelFormat < 0 || frame.pixelFormat >= REVEL_PF_COUNT))
{
return REVEL_ERR_PARAMS;
}
return REVEL_ERR_NONE;
}
Revel_Error Revel_BaseEncoder::EncodeAudio(const void *sampleBuffer,
const int numBytes, int *numTotalBytes)
{
// Make sure it's safe to be encoding.
if (!m_isEncoding)
return REVEL_ERR_BUSY;
if (m_params.hasAudio != 1)
return REVEL_ERR_NONE;
// Check args
if (numBytes == 0)
return REVEL_ERR_NONE;
if (sampleBuffer == NULL)
return REVEL_ERR_PARAMS;
int err = AVI_write_audio(m_outFile, (char*)sampleBuffer, numBytes);
if (err != 0)
return REVEL_ERR_UNKNOWN;
m_totalOutBytes += numBytes;
if (numTotalBytes != NULL)
*numTotalBytes = AVI_audio_bytes(m_outFile);
return REVEL_ERR_NONE;
}
Revel_Error Revel_BaseEncoder::EncodeEnd(int *totalSize)
{
if (!m_isEncoding)
return REVEL_ERR_BUSY;
int aviErr = 0;
if (m_outFile != NULL)
{
aviErr = AVI_close(m_outFile);
m_outFile = NULL;
}
if (totalSize != NULL)
*totalSize = m_totalOutBytes;
Reset();
if (aviErr != 0)
return REVEL_ERR_FILE;
return REVEL_ERR_NONE;
}
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