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/*******************************************************************************#
# guvcview http://guvcview.sourceforge.net #
# #
# Paulo Assis <pj.assis@gmail.com> #
# George Sedov <radist.morse@gmail.com> #
# - Threaded encoding #
# #
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #
# #
********************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
/* support for internationalization - i18n */
#include <locale.h>
#include <libintl.h>
#include "gviewencoder.h"
#include "encoder.h"
#define AV_RB16(x) \
((((const uint8_t*)(x))[0] << 8) | \
((const uint8_t*)(x))[1])
/*
* set yu12 frame in codec data frame
* args:
* video_codec_data - pointer to video codec data
* inp - input data (yu12)
* width - frame width
* height - frame height
*
* asserts:
* video_codec_data is not null
* inp is not null
*
* returns: none
*/
void prepare_video_frame(encoder_codec_data_t *video_codec_data, uint8_t *inp, int width, int height)
{
/*assertions*/
assert(video_codec_data);
assert(inp);
if(av_frame_make_writable(video_codec_data->frame) < 0) {
fprintf(
stderr,
"ENCODER: FATAL av_frame_make_writable failure (prepare_video_frame): %s\n",
strerror(errno));
exit(-1);
}
int size = width * height;
video_codec_data->frame->format = AV_PIX_FMT_YUV420P;
video_codec_data->frame->width = width;
video_codec_data->frame->height = height;
video_codec_data->frame->data[0] = inp; //Y
video_codec_data->frame->data[1] = inp + size; //U
video_codec_data->frame->data[2] = video_codec_data->frame->data[1] + size/4; //V
video_codec_data->frame->linesize[0] = width;
video_codec_data->frame->linesize[1] = width / 2;
video_codec_data->frame->linesize[2] = width / 2;
}
/*
* split xiph headers from libav private data
* args:
* extradata - libav codec private data
* extradata_size - codec private data size
* first_header_size - first header size
* header_start - first 3 bytes of header
* header_len - header length
*
* asserts:
* none
*
* returns: error code
*/
int avpriv_split_xiph_headers(
uint8_t *extradata,
int extradata_size,
int first_header_size,
uint8_t *header_start[3],
int header_len[3])
{
int i;
if (extradata_size >= 6 && AV_RB16(extradata) == first_header_size) {
int overall_len = 6;
for (i=0; i<3; i++) {
header_len[i] = AV_RB16(extradata);
extradata += 2;
header_start[i] = extradata;
extradata += header_len[i];
if (overall_len > extradata_size - header_len[i])
return -1;
overall_len += header_len[i];
}
} else if (extradata_size >= 3 && extradata_size < INT_MAX - 0x1ff && extradata[0] == 2) {
int overall_len = 3;
extradata++;
for (i=0; i<2; i++, extradata++) {
header_len[i] = 0;
for (; overall_len < extradata_size && *extradata==0xff; extradata++) {
header_len[i] += 0xff;
overall_len += 0xff + 1;
}
header_len[i] += *extradata;
overall_len += *extradata;
if (overall_len > extradata_size)
return -1;
}
header_len[2] = extradata_size - overall_len;
header_start[0] = extradata;
header_start[1] = header_start[0] + header_len[0];
header_start[2] = header_start[1] + header_len[1];
} else {
return -1;
}
return 0;
}
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