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-rw-r--r--src/libfame_wrapper.cc273
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-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/***************************************************************************
- * libfame_wrapper.cc
- *
- * Sat Jul 2 11:11:31 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 "libfame_wrapper.h"
-
-#include <errno.h>
-
-#include "miav_config.h"
-#include "frame.h"
-
-LibFAMEWrapper::LibFAMEWrapper(Info *i)
-{
- info = i;
-
- // FIXME: Hmmm... should this be detected somewhere?!
- int w = 720;
- int h = 576;
-
- // Initialize yuv structure.
- yuv.w = w;
- yuv.h = h;
- yuv.p = w;
- yuv.y = new unsigned char [w*h * 2];
- yuv.u = new unsigned char [w*h];// [w*h/4]
- yuv.v = new unsigned char [w*h];// [w*h/4]
-
- calc_bitrate = 0;
- frame_number = 0;
-
- ////////////LIBDV STUFF///////////////
-
- dvdecoder = NULL; // Initialize in encode method
-
- /////////LIBFAME STUFF///////////
-
- // Allocate the output buffer.
-// fame_buffer = new unsigned char [FAME_BUFFER_SIZE];
-
- // Open a new session of the fame library.
- // (If initialization was successful, it returns a non-null context which
- // can then be used for subsequent library calls.)
- fame_context = fame_open();
- if(!fame_context) {
- info->error("Unable to open FAME context, due to the following error: %s", strerror(errno));
- return;
- }
-
- /*
- typedef struct _fame_parameters_ {
- int width; // width of the video sequence
- int height; // height of the video sequence
- char const *coding; // coding sequence
- int quality; // video quality
- int slices_per_frame; // number of slices per frame
- unsigned int frames_per_sequence; // number of frames per sequence
- int frame_rate_num; // numerator of frames per second
- int frame_rate_den; // denominator of frames per second
- unsigned int shape_quality; // binary shape quality
- unsigned int search_range; // motion estimation search range
- unsigned char verbose; // verbosity
- } fame_parameters_t;
- */
- // width and height specify the size of each frames of the video sequence.
- // Both must be multiple of 16. width and height must be less than 4096x4096
- fame_par.width = 720;
- fame_par.height = 576;
-
- // coding is a string of I, P or B characters representing the sequence of
- // frames the encoder must produce. I frames are intra-coded frames (similar
- // to JPEG), whereas P and B frames are motion compressed, respectively
- // predicted from past reference (I or P) frame, or bidirectionally predicted
- // from past and future reference frame.
- fame_par.coding = config->readString("frame_sequence")->c_str();
-
- // quality is a percentage, which controls compression versus quality.
- fame_par.quality = config->readInt("video_quality");
-
- // Bitrate
- fame_par.bitrate = config->readInt("video_bitrate") * 1000; // video bitrate in bytes pr second (0=VBR)
-
- // slices_per_frame is the number of frame slices per frame. More slices provide
- // better error recovery. There must be at least one slice per frame, and at most
- // height / 16
- fame_par.slices_per_frame = 1;//fame_par.height / 16;
-
- // frames_per_sequence is the maximum number of frames contained in a video
- // sequence.
- fame_par.frames_per_sequence = 0xffffffff; // Unlimited length
-
- // frame_rate_num/frame_rate_den specify the number of frames per second for
- // playback.
- fame_par.frame_rate_num = 25; // 25 / 1 fps = 25 fps
- fame_par.frame_rate_den = 1;
-
- // shape_quality is percentage determing the average binary shape accuracy in
- // video with arbitrary shape.
- fame_par.shape_quality = 100; // Original shape
-
- // search_range specifies the motion estimation search range in pixel unit.
- // Small search ranges work best with slow motion videos, whereas larger search
- // ranges are rather for fast motion videos.
- fame_par.search_range = 0; // Adaptive search range
-
- // verbose when set to 1 outputs information on copyright, modules used and
- // current frame on standard error.
- fame_par.verbose = 0;
-
- static const char profilename[] = "MIaV\0";
- fame_par.profile = profilename; // profile name
- fame_par.total_frames = 0; // total number of frames
-
- if(strcmp(config->readString("encoding_codec")->c_str(), "mpeg4") == 0) {
-
- info->info("Using mpeg4 compression.");
- fame_object_t *object;
-
- object = fame_get_object(fame_context, "profile/mpeg4/simple");
- if(object) fame_register(fame_context, "profile", object);
-
- } else if(strcmp(config->readString("encoding_codec")->c_str(), "mpeg1") == 0) {
-
- info->info("Using mpeg1 compression.");
- fame_object_t *object;
-
- object = fame_get_object(fame_context, "profile/mpeg1");
- if(object) fame_register(fame_context, "profile", object);
-
- } else if(strcmp(config->readString("encoding_codec")->c_str(), "mpeg1") == 0) {
- } else {
- info->info("Using default (mpeg1) compression.");
- }
-
- fame_init(fame_context, &fame_par, fame_buffer, FAME_BUFFER_SIZE);
-}
-
-LibFAMEWrapper::~LibFAMEWrapper()
-{
- delete [] yuv.y;
- delete [] yuv.u;
- delete [] yuv.v;
-}
-
-Frame *LibFAMEWrapper::encode(Frame *dvframe)
-{
- // if(!f) return; // The file was not opened.
-
- // Decode DV Frame to YUV422
- int w = 720;
- int h = 576;
-
- unsigned char *pixels[3];
- int pitches[3];
-
- if(!dvdecoder) {
- dvdecoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
- dvdecoder->quality = DV_QUALITY_BEST;
-
- dv_parse_header(dvdecoder, dvframe->data);
- //dv_parse_packs(decoder, frame->data); // Not needed anyway!
-
- dvdecoder->system = e_dv_system_625_50; // PAL lines, PAL framerate
- dvdecoder->sampling = e_dv_sample_422; // 4 bytes y, 2 bytes u, 2 bytes v
- dvdecoder->std = e_dv_std_iec_61834;
- dvdecoder->num_dif_seqs = 12;
- }
-
- pixels[ 0 ] = picture; // We use this as the output buffer
- pitches[ 0 ] = w * 2;
-
- dv_decode_full_frame(dvdecoder,
- dvframe->data,
- e_dv_color_yuv,
- pixels,
- pitches);
-
- // Convert YUV422 to YUV420p
- int w2 = w / 2;
- uint8_t *y = yuv.y;
- uint8_t *cb = yuv.u;
- uint8_t *cr = yuv.v;
- uint8_t *p = picture;
-
- for ( int i = 0; i < h; i += 2 ) {
- // process two scanlines (one from each field, interleaved)
- for ( int j = 0; j < w2; j++ ) {
- // packed YUV 422 is: Y[i] U[i] Y[i+1] V[i]
- *( y++ ) = *( p++ );
- *( cb++ ) = *( p++ );
- *( y++ ) = *( p++ );
- *( cr++ ) = *( p++ );
- }
-
- // process next two scanlines (one from each field, interleaved)
- for ( int j = 0; j < w2; j++ ) {
- // skip every second line for U and V
- *( y++ ) = *( p++ );
- p++;
- *( y++ ) = *( p++ );
- p++;
- }
- }
-
- // Allocate a new frame for the output
- Frame *output = new Frame(NULL, FAME_BUFFER_SIZE);
-
- // Init frame params
- dv_get_timestamp(dvdecoder, output->timecode); // Set timecode
- output->size = 0; // Init size (incremented as we read)
- unsigned char* pt = output->data; // Set pointer to start of data buffer
-
- // Encode YUV frame and write it to disk.
- fame_start_frame(fame_context, &yuv, 0);
- int written;
-
- while((written = fame_encode_slice(fame_context))) {
- memcpy(pt, fame_buffer, written);
- pt += written;
- output->size += written;
- }
-
- // fame_frame_statistics_t stats;
-
- // fame_end_frame(fame_context, &stats);
- /*
- info->info("frame_number: %d, coding: %c, target_bits: %d, actual_bits: %d, spatial_activity: %d, quant_scale: %f",
- stats.frame_number,
- stats.coding,
- stats.target_bits,
- stats.actual_bits,
- stats.spatial_activity,
- stats.quant_scale);
- */
- /*
- fame_frame_statistics_t_ {
- unsigned int frame_number;
- char coding;
- signed int target_bits;
- unsigned int actual_bits;
- unsigned int spatial_activity;
- float quant_scale;
- }
- */
- frame_number++;
- calc_bitrate += output->size; //stats.actual_bits;
- output->bitrate = (unsigned int)((double)calc_bitrate / (double)frame_number) * 25;
-
- return output;
-}
-
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