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/*******************************************************************************
rtjpeg_codec.c
libquicktime - A library for reading and writing quicktime/avi/mp4 files.
http://libquicktime.sourceforge.net
Copyright (C) 2002 Heroine Virtual Ltd.
Copyright (C) 2002-2011 Members of the libquicktime project.
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option)
any later version.
This library 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 Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*******************************************************************************/
#include "lqt_private.h"
#include "rtjpeg_codec.h"
#include <quicktime/colormodels.h>
#include <stdlib.h>
#include <string.h>
#define BLOCK_SIZE 16
static int delete_codec(quicktime_codec_t *codec_base)
{
quicktime_rtjpeg_codec_t *codec = codec_base->priv;
if(codec->compress_struct)
RTjpeg_close(codec->compress_struct);
if(codec->rows)
lqt_rows_free(codec->rows);
if(codec->write_buffer)
free(codec->write_buffer);
if(codec->decompress_struct)
RTjpeg_close(codec->decompress_struct);
if(codec->read_buffer)
free(codec->read_buffer);
free(codec);
return 0;
}
static int decode(quicktime_t *file, unsigned char **row_pointers, int track)
{
int result = 0;
int t;
int buffer_size;
quicktime_video_map_t *vtrack = &file->vtracks[track];
// quicktime_trak_t *trak = vtrack->track;
quicktime_rtjpeg_codec_t *codec = vtrack->codec->priv;
if(!row_pointers)
{
vtrack->stream_cmodel = BC_YUV420P;
return 0;
}
if(!codec->decompress_struct) {
codec->decompress_struct = RTjpeg_init();
if(!codec->decompress_struct)
return -1;
codec->qt_height = quicktime_video_height(file, track);
codec->qt_width = quicktime_video_width(file, track);
codec->jpeg_height = BLOCK_SIZE * ((codec->qt_height + BLOCK_SIZE - 1) / (BLOCK_SIZE));
codec->jpeg_width = BLOCK_SIZE * ((codec->qt_width + BLOCK_SIZE - 1) / (BLOCK_SIZE));
t = RTJ_YUV420;
RTjpeg_set_format(codec->decompress_struct, &t);
codec->rows = lqt_rows_alloc(codec->jpeg_width, codec->jpeg_height,
vtrack->stream_cmodel, &codec->rowspan,
&codec->rowspan_uv);
}
buffer_size = lqt_read_video_frame(file, &codec->read_buffer,
&codec->read_buffer_alloc,
vtrack->current_position, NULL, track);
if(buffer_size <= 0)
result = -1;
if(buffer_size > 0) {
if(!result)
RTjpeg_decompress(codec->decompress_struct, codec->read_buffer, codec->rows);
}
lqt_rows_copy(row_pointers, codec->rows, codec->qt_width, codec->qt_height,
codec->rowspan, codec->rowspan_uv,
vtrack->stream_row_span, vtrack->stream_row_span_uv, vtrack->stream_cmodel);
return result;
}
static int encode(quicktime_t *file, unsigned char **row_pointers, int track)
{
int result = 0;
int i;
quicktime_video_map_t *vtrack = &file->vtracks[track];
quicktime_trak_t *trak = vtrack->track;
quicktime_rtjpeg_codec_t *codec = vtrack->codec->priv;
if(!row_pointers)
{
vtrack->stream_cmodel = BC_YUV420P;
return 0;
}
if(!codec->compress_struct) {
codec->compress_struct = RTjpeg_init();
if(!codec->compress_struct)
return -1;
codec->qt_height = trak->tkhd.track_height;
codec->qt_width = trak->tkhd.track_width;
codec->jpeg_height = BLOCK_SIZE * ((codec->qt_height + BLOCK_SIZE - 1) / (BLOCK_SIZE));
codec->jpeg_width = BLOCK_SIZE * ((codec->qt_width + BLOCK_SIZE - 1) / (BLOCK_SIZE));
RTjpeg_set_size(codec->compress_struct, &codec->jpeg_width, &codec->jpeg_height);
i = codec->Q;
i *= 255;
i /= 100;
RTjpeg_set_quality(codec->compress_struct, &i);
i = RTJ_YUV420;
RTjpeg_set_format(codec->compress_struct, &i);
RTjpeg_set_intra(codec->compress_struct, &codec->K, &codec->LQ, &codec->CQ);
codec->rows = lqt_rows_alloc(codec->jpeg_width, codec->jpeg_height,
vtrack->stream_cmodel, &codec->rowspan,
&codec->rowspan_uv);
codec->write_buffer = malloc(codec->jpeg_width * codec->jpeg_height * 3 / 2 + 100);
if(!codec->write_buffer)
return -1;
}
lqt_rows_copy(codec->rows, row_pointers, codec->qt_width, codec->qt_height,
vtrack->stream_row_span, vtrack->stream_row_span_uv,
codec->rowspan, codec->rowspan_uv,
vtrack->stream_cmodel);
i = RTjpeg_compress(codec->compress_struct, codec->write_buffer, codec->rows);
lqt_write_frame_header(file, track,
vtrack->current_position,
-1, 0);
result = !quicktime_write_data(file,
codec->write_buffer,
i);
lqt_write_frame_footer(file, track);
return result;
}
static int set_parameter(quicktime_t *file,
int track,
const char *key,
const void *value)
{
quicktime_rtjpeg_codec_t *codec = file->vtracks[track].codec->priv;
if(!strcasecmp(key, "rtjpeg_quality"))
codec->Q = *(int*)value;
if(!strcasecmp(key, "rtjpeg_key_rate"))
codec->K = *(int*)value;
if(!strcasecmp(key, "rtjpeg_luma_quant"))
codec->LQ = *(int*)value;
if(!strcasecmp(key, "rtjpeg_chroma_quant"))
codec->CQ = *(int*)value;
return 0;
}
void quicktime_init_codec_rtjpeg(quicktime_codec_t * codec_base,
quicktime_audio_map_t *atrack,
quicktime_video_map_t *vtrack)
{
quicktime_rtjpeg_codec_t *codec;
codec = calloc(1, sizeof(*codec));
if(!codec)
return;
codec->Q = 100;
codec->K = 25;
codec->LQ = 1;
codec->CQ = 1;
codec_base->priv = codec;
codec_base->delete_codec = delete_codec;
codec_base->decode_video = decode;
codec_base->encode_video = encode;
codec_base->set_parameter = set_parameter;
}
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