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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* mov_encoder_thread.cc
*
* Tue May 17 16:00:01 CEST 2005
* Copyright 2005 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of MIaV.
*
* MIaV 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.
*
* MIaV 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 MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <config.h>
#include "ffmpeg_encoder.h"
#include <errno.h>
#include "miav_config.h"
#include <math.h>
#include <ffmpeg/avcodec.h>
#include <ffmpeg/avformat.h>
#define AUDIO_BUFFER_SIZE DV_AUDIO_MAX_SAMPLES
//(DV_AUDIO_MAX_SAMPLES * sizeof(int16_t))
FFMpegEncoder::FFMpegEncoder(const char *clientip, const char *cpr)
{
MIaV::info->info("FFMpegEncoder");
// init encoder
output = new FFOutput(cpr, clientip);
// Init DV decoder
avcodec_init();
// Video
dvvcodec = avcodec_find_decoder(CODEC_ID_DVVIDEO);
if(!dvvcodec) MIaV::info->error("Could not find DV Video codec.");
dvvcontext = avcodec_alloc_context();
if(avcodec_open(dvvcontext, dvvcodec) < 0) MIaV::info->error("Could not open DV Video codec.");
// Audio
dvacodec = avcodec_find_decoder(CODEC_ID_PCM_S16LE);
if(!dvacodec) MIaV::info->error("Could not find DV Audio codec.");
dvacontext = avcodec_alloc_context();
if(avcodec_open(dvacontext, dvacodec) < 0) MIaV::info->error("Could not open DV Audio codec.");
frame_number = 0;
audio_buffer[0] = (int16_t*)calloc(AUDIO_BUFFER_SIZE, sizeof(int16_t));
audio_buffer[1] = (int16_t*)calloc(AUDIO_BUFFER_SIZE, sizeof(int16_t));
sin_cnt = 0;
decoder = NULL;
// CBuffer init
cbufferdatasize = 0;
cbuffer_size = AUDIO_BUFFER_SIZE * 4; // Buffer max, 2 frames * 2 channels.
cbuffer = (int16_t *)malloc(cbuffer_size * sizeof(int16_t));
pbegin = 0;
}
//#include <unistd.h>
FFMpegEncoder::~FFMpegEncoder()
{
MIaV::info->info("~FFMpegEncoder...");
delete output;
free(audio_buffer[0]);
free(audio_buffer[1]);
free(cbuffer);
dv_decoder_free(decoder);
MIaV::info->info("~FFMpegEncoder::done");
}
void FFMpegEncoder::encode(Frame* frame)
{
if(frame_number % 250 == 0)
MIaV::info->info("Got frame %d ...", frame_number);
if(frame == NULL) {
MIaV::info->info("FFMpegEncoder::encode - NULL frame detected.");
// Terminate
return;
}
if(frame->endOfFrameStream) {
// MIaV::info->info("endOfStream");
return;
}
frame->number = frame_number;
#if 0
// Use to half the framerate.
if(frame_number % 2 == 0) {
frame_number ++;
return;
}
#endif
//
// VIDEO
//
FFFrame *vfrm = new FFFrame();
vfrm->avframe = avcodec_alloc_frame();
vfrm->codec_context = dvvcontext;
int got_picture;
int pos = avcodec_decode_video(dvvcontext, vfrm->avframe, &got_picture, frame->data, frame->size);
if(!got_picture)
MIaV::info->warn("Decoding did not result in a picture!");
output->writeFrame(vfrm);
//
// AUDIO
//
FFFrame *afrm = new FFFrame();
afrm->pcmdatasize = output->audio_st->codec->frame_size * 2 * sizeof(int16_t);
afrm->pcmdata = (int16_t*)malloc(afrm->pcmdatasize);
//afrm->avframe = avcodec_alloc_frame();
afrm->codec_context = dvacontext;
if(frame->mute) {
// Overwrite audiobuffer with dummy data
double volume = 1000; // Min:= 0 - Max := 32000
double frequency = 440; // in Hz
for(int cnt = 0; cnt < 48000/25; cnt++) {
sin_cnt++;
double sin_val = (((double)sin_cnt / (double)48000) * (double)M_PI) * frequency;
audio_buffer[0][cnt] = audio_buffer[1][cnt] = (short int)(sin(sin_val) * volume);
}
} else {
// Decode audio from dv frame
if(!decoder) {
decoder = dv_decoder_new(FALSE, FALSE, FALSE);
decoder->quality = DV_QUALITY_BEST;
dv_parse_header(decoder, frame->data);
decoder->system = e_dv_system_625_50; // PAL lines, PAL framerate
decoder->sampling = e_dv_sample_422; // 4 bytes y, 2 bytes u, 2 bytes v
decoder->std = e_dv_std_iec_61834;
decoder->num_dif_seqs = 12;
}
// Decode audio using libdv
int frames = dv_decode_full_audio( decoder, frame->data, audio_buffer );
}
// Write new data to cbuffer
int pend = pbegin + cbufferdatasize;
for(int i = 0; i < (48000/25)*2; i++) {
cbuffer[(pend + i) % cbuffer_size] = audio_buffer[i%2][i/2];
}
cbufferdatasize += (48000/25)*2;
// Read out full ffmpeg frames from cbuffer.
while(cbufferdatasize >= output->audio_st->codec->frame_size * 2) {
for(int i = 0; i < output->audio_st->codec->frame_size * 2; i++) {
afrm->pcmdata[i] = cbuffer[(pbegin + i) % cbuffer_size];
}
cbufferdatasize -= output->audio_st->codec->frame_size * 2;
pbegin += output->audio_st->codec->frame_size * 2;
output->writeFrame(afrm);
}
frame_number ++;
av_free(vfrm->avframe);
delete vfrm;
free(afrm->pcmdata);
delete afrm;
delete frame;
}
void FFMpegEncoder::setSaveState(n_savestate savestate)
{
output->setSaveState(savestate);
}
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