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-rw-r--r--src/decoder.cc286
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-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/***************************************************************************
- * decoder.cc
- *
- * Sat Feb 19 17:05:43 CET 2005
- * Copyright 2005 Bent Bisballe
- * deva@aasimon.org
- ****************************************************************************/
-
-/*
- * Originally from:
- * RTVideoRec Realtime video recoder and encoder for Linux
- *
- * Copyright (C) 2004 B. Stultiens
- * Copyright (C) 2004 Koen Otter and Glenn van der Meyden
- */
-
-/*
- * 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>
-#ifdef USE_GUI
-
-#include "frame_stream.h"
-
-#include "miav_config.h"
-
-#include <time.h>
-
-// Use libdv
-#include <libdv/dv.h>
-#include <libdv/dv_types.h>
-
-#include <SDL/SDL.h>
-
-#include "dv.h"
-#include "dvfile.h"
-#include "dv1394.h"
-
-#include "decoder.h"
-#include "debug.h"
-
-Decoder::Decoder(Info *ginfo,
- sem_t *gencode_sem,
- sem_t *gplayer_sem,
- Queue<Frame> *gencode_queue,
- Queue<Frame> *gplayer_queue,
- pthread_mutex_t *gmutex,
- volatile int *grunning)
-{
- info = ginfo;
-
- encode_sem = gencode_sem;
- player_sem = gplayer_sem;
- encode_queue = gencode_queue;
- player_queue = gplayer_queue;
- mutex = gmutex;
- running = grunning;
-
- b_shoot = false;
- b_freeze = false;
- b_record = false; // Initially no recording is done.
-
- pthread_mutex_init (&shot_mutex, NULL);
- shot = NULL;
-
- mute = false;
-}
-
-Decoder::~Decoder()
-{
- pthread_mutex_destroy(&shot_mutex);
-}
-
-void Decoder::decode()
-{
- frame_stream *dvstream;
-
- bool local_shoot;
- int local_freeze;
- bool local_record = false;
- bool old_record;
-
- bool skip_frames = config->readInt("player_skip_frames");
-
- dv1394 dv1394_stream = dv1394(info); // Use default port and channel.
- dvfile dvfile_stream = dvfile(info);
- if(dv1394_stream.connect()) {
- // Use the dv1394 stream for input.
- dvstream = &dv1394_stream;
- } else {
- // Use the fallback dv filereader for input.
- dvstream = &dvfile_stream;
- }
-
- while(*running) {
- uint8_t *ptr;
- SDL_Event user_event;
-
- // Read a dvframe
- ptr = dvstream->readFrame();
- if(!ptr) return; // No frame read. (Due to dv read error)
-
- old_record = local_record;
- local_shoot = b_shoot;
- b_shoot = false;
- local_freeze = b_freeze;
- b_freeze = false;
- local_record = b_record;
-
- if(local_shoot) {
- pthread_mutex_lock(&shot_mutex);
- if(!shot) shot = new Frame(ptr, DVPACKAGE_SIZE);
- pthread_mutex_unlock(&shot_mutex);
- }
-
- if(local_freeze == 1) {
- pthread_mutex_lock(&shot_mutex);
- if(shot) delete shot;
- shot = new Frame(ptr, DVPACKAGE_SIZE);
- pthread_mutex_unlock(&shot_mutex);
- }
-
- static int showframe = 1;
- if(skip_frames != 0) showframe = 1 - showframe;
- if(showframe) {
- Frame *pframe = new Frame(ptr, DVPACKAGE_SIZE);
-
- pframe->shoot = local_shoot;
- pframe->freeze = local_freeze;
- pframe->record = local_record;
-
- player_queue->push(pframe);
-
- // Create and send SDL event.
- user_event.type = SDL_USEREVENT;
- user_event.user.code = 0;
- user_event.user.data1 = NULL;
- user_event.user.data2 = NULL;
- SDL_PushEvent(&user_event);
- }
-
- if(local_record | (local_record != old_record) | local_shoot | local_freeze) {
- Frame *eframe = new Frame(NULL, 0);
- eframe->data = ptr;
- eframe->size = DVPACKAGE_SIZE;
-
- eframe->shoot = local_shoot;
- eframe->freeze = local_freeze;
- eframe->record = local_record;
- eframe->mute = mute;
-
- encode_queue->push(eframe);
-
- sem_post(encode_sem);
- } else {
- free(ptr);
- }
- }
-
- // Kick the others so they wake up with empty queues
- sem_post(encode_sem);
-}
-
-void Decoder::thread_main() {
- decode();
- fprintf(stderr, "Decoder thread stopped.\n"); fflush(stderr);
-}
-
-/*
- * Set freeze bit on current frame.
- */
-void Decoder::freeze()
-{
- b_freeze = 1;
-}
-
-/*
- * Remove frozen frame.
- */
-void Decoder::unfreeze()
-{
- b_freeze = -1;
-
- pthread_mutex_lock(&shot_mutex);
- delete shot;
- shot = NULL;
- pthread_mutex_unlock(&shot_mutex);
-}
-
-/*
- * Set shoot bit on current frame.
- */
-void Decoder::shoot(unsigned char *rgb)
-{
- struct timespec ts;
-
- b_shoot = true;
-
- // Wait for shot to be taken
- while(1) {
- pthread_mutex_lock(&shot_mutex);
- if(shot) {
- getScreenshot(shot, rgb);
- delete shot;
- shot = NULL;
- pthread_mutex_unlock(&shot_mutex);
- return;
- }
- pthread_mutex_unlock(&shot_mutex);
-
- ts.tv_sec = 0;
- ts.tv_nsec = 100000000L; // 100ms
- nanosleep(&ts, NULL);
- }
-}
-
-/*
- * Set the record bit to true in all following frames.
- */
-void Decoder::start()
-{
- b_record = true;
-}
-
-/*
- * Set the record bit to false in all following frames.
- */
-void Decoder::stop(n_savestate save)
-{
- b_record = false;
-}
-
-void Decoder::getScreenshot(Frame *frame, unsigned char *rgb)
-{
- unsigned char *pixels[3];
- int pitches[3];
-
- pixels[ 0 ] = rgb;
- pixels[ 1 ] = NULL;
- pixels[ 2 ] = NULL;
-
- pitches[ 0 ] = 720 * 4;
- pitches[ 1 ] = 0;
- pitches[ 2 ] = 0;
-
- dv_decoder_t *decoder = dv_decoder_new(FALSE/*this value is unused*/, 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;
-
- // libdv img decode to rgb
- dv_decode_full_frame(decoder,
- frame->data,
- e_dv_color_bgr0,
- pixels,
- pitches);
-
- dv_decoder_free(decoder);
-}
-
-void Decoder::setMute(bool m)
-{
- mute = m;
-}
-
-#endif /*USE_GUI*/
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