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/*****************************************************************
* gavl - a general purpose audio/video processing library
*
* Copyright (c) 2001 - 2011 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* 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, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <string.h>
#include <stdio.h>
#include <gavl/gavl.h>
void gavl_video_format_copy(gavl_video_format_t * dst,
const gavl_video_format_t * src)
{
memcpy(dst, src, sizeof(*dst));
}
void gavl_video_format_dump(const gavl_video_format_t * format)
{
fprintf(stderr, " Frame size: %d x %d\n",
format->frame_width, format->frame_height);
fprintf(stderr, " Image size: %d x %d\n",
format->image_width, format->image_height);
fprintf(stderr, " Pixel size: %d x %d\n",
format->pixel_width, format->pixel_height);
fprintf(stderr, " Pixel format: %s\n",
gavl_pixelformat_to_string(format->pixelformat));
if(format->framerate_mode != GAVL_FRAMERATE_STILL)
{
if((!format->frame_duration) &&
(format->framerate_mode == GAVL_FRAMERATE_VARIABLE))
{
fprintf(stderr, " Framerate: Variable (timescale: %d)\n",
format->timescale);
}
else
{
fprintf(stderr, " Framerate: %f",
(float)(format->timescale)/((float)format->frame_duration));
fprintf(stderr, " [%d / %d]", format->timescale,
format->frame_duration);
fprintf(stderr, " fps");
if(format->framerate_mode == GAVL_FRAMERATE_CONSTANT)
fprintf(stderr, " (Constant)\n");
else
fprintf(stderr, " (Not constant)\n");
}
}
else
{
fprintf(stderr, " Still image\n");
}
fprintf(stderr, " Interlace mode: %s\n", gavl_interlace_mode_to_string(format->interlace_mode));
if((format->pixelformat == GAVL_YUV_420_P) || (format->pixelformat == GAVL_YUVJ_420_P))
{
fprintf(stderr, " Chroma placement: %s\n", gavl_chroma_placement_to_string(format->chroma_placement));
}
if(format->timecode_format.int_framerate)
{
fprintf(stderr, " Timecode framerate: %d\n", format->timecode_format.int_framerate);
fprintf(stderr, " Timecode flags: ");
if(format->timecode_format.flags & GAVL_TIMECODE_DROP_FRAME)
fprintf(stderr, "Drop");
fprintf(stderr, "\n");
}
}
/* We always enlarge the image */
void gavl_video_format_fit_to_source(gavl_video_format_t * dst,
const gavl_video_format_t * src)
{
int f_1, f_2;
f_1 = src->pixel_width * dst->pixel_height;
f_2 = dst->pixel_width * src->pixel_height;
if(f_1 > f_2) /* Make dst wider */
{
dst->image_width =
(src->image_width * f_1) / f_2;
dst->image_height = src->image_height;
}
else if(f_1 < f_2) /* Make dst higher */
{
dst->image_height =
(src->image_height * f_2) / f_1;
dst->image_width = src->image_width;
}
else
{
dst->image_width = src->image_width;
dst->image_height = src->image_height;
}
}
typedef const struct
{
gavl_interlace_mode_t mode;
char * name;
} interlace_mode_tab_t;
interlace_mode_tab_t interlace_mode_tab[] =
{
{ GAVL_INTERLACE_UNKNOWN, "Unknown" },
{ GAVL_INTERLACE_NONE, "None (Progressive)" },
{ GAVL_INTERLACE_TOP_FIRST, "Top field first" },
{ GAVL_INTERLACE_BOTTOM_FIRST, "Bottom field first" },
{ GAVL_INTERLACE_MIXED, "Mixed" },
{ GAVL_INTERLACE_MIXED_TOP, "Top first + progressive" },
{ GAVL_INTERLACE_MIXED_BOTTOM, "Bottom first + progressive" }
};
static const int num_interlace_modes = sizeof(interlace_mode_tab)/sizeof(interlace_mode_tab[0]);
const char * gavl_interlace_mode_to_string(gavl_interlace_mode_t mode)
{
int i;
for(i = 0; i < num_interlace_modes; i++)
{
if(interlace_mode_tab[i].mode == mode)
return interlace_mode_tab[i].name;
}
return NULL;
}
typedef const struct
{
gavl_framerate_mode_t mode;
char * name;
} framerate_mode_tab_t;
framerate_mode_tab_t framerate_mode_tab[] =
{
{ GAVL_FRAMERATE_UNKNOWN, "Unknown" },
{ GAVL_FRAMERATE_CONSTANT, "Constant" },
{ GAVL_FRAMERATE_VARIABLE, "Variable" },
{ GAVL_FRAMERATE_STILL, "Still" },
};
static const int num_framerate_modes = sizeof(framerate_mode_tab)/sizeof(framerate_mode_tab[0]);
const char * gavl_framerate_mode_to_string(gavl_framerate_mode_t mode)
{
int i;
for(i = 0; i < num_framerate_modes; i++)
{
if(framerate_mode_tab[i].mode == mode)
return framerate_mode_tab[i].name;
}
return NULL;
}
typedef struct
{
gavl_chroma_placement_t mode;
char * name;
} chroma_placement_tab_t;
const chroma_placement_tab_t chroma_placement_tab[] =
{
{ GAVL_CHROMA_PLACEMENT_DEFAULT, "MPEG-1/JPEG" },
{ GAVL_CHROMA_PLACEMENT_MPEG2, "MPEG-2" },
{ GAVL_CHROMA_PLACEMENT_DVPAL, "DV PAL" }
};
static const int num_chroma_placements = sizeof(chroma_placement_tab)/sizeof(chroma_placement_tab_t);
const char * gavl_chroma_placement_to_string(gavl_chroma_placement_t mode)
{
int i;
for(i = 0; i < num_chroma_placements; i++)
{
if(chroma_placement_tab[i].mode == mode)
return chroma_placement_tab[i].name;
}
return NULL;
}
void gavl_video_format_get_chroma_offset(const gavl_video_format_t * format,
int field, int plane,
float * off_x, float * off_y)
{
int sub_h, sub_v;
if(!plane)
{
*off_x = 0.0;
*off_y = 0.0;
return;
}
gavl_pixelformat_chroma_sub(format->pixelformat, &sub_h, &sub_v);
if((sub_h != 2) || (sub_v != 2))
{
*off_x = 0.0;
*off_y = 0.0;
return;
}
switch(format->chroma_placement)
{
case GAVL_CHROMA_PLACEMENT_DEFAULT:
*off_x = 0.5;
*off_y = 0.5;
break;
case GAVL_CHROMA_PLACEMENT_MPEG2:
if(format->interlace_mode == GAVL_INTERLACE_NONE)
{
*off_x = 0.0;
*off_y = 0.5;
}
else if(field == 0) /* Top field */
{
*off_x = 0.0;
*off_y = 0.25; /* In FIELD coordinates */
// *off_y = 0.5; /* In FRAME coordinates */
}
else /* Bottom field */
{
*off_x = 0.0;
*off_y = 0.75; /* In FIELD coordinates */
// *off_y = 1.5; /* In FRAME coordinates */
}
break;
case GAVL_CHROMA_PLACEMENT_DVPAL:
if(plane == 1) /* Cb */
{
*off_x = 0.0;
*off_y = 1.0; /* In FIELD coordinates */
}
else /* Cr */
{
*off_x = 0.0;
*off_y = 0.0; /* In FIELD coordinates */
}
break;
}
}
int gavl_video_formats_equal(const gavl_video_format_t * format_1,
const gavl_video_format_t * format_2)
{
return !memcmp(format_1, format_2, sizeof(*format_1));
}
int gavl_video_format_get_image_size(const gavl_video_format_t * format)
{
int i;
int bytes_per_line;
int sub_h, sub_v;
int ret = 0, height;
int num_planes = gavl_pixelformat_num_planes(format->pixelformat);
bytes_per_line = gavl_pixelformat_is_planar(format->pixelformat) ?
format->frame_width * gavl_pixelformat_bytes_per_component(format->pixelformat) :
format->frame_width * gavl_pixelformat_bytes_per_pixel(format->pixelformat);
gavl_pixelformat_chroma_sub(format->pixelformat, &sub_h, &sub_v);
height = format->frame_height;
for(i = 0; i < num_planes; i++)
{
ret += bytes_per_line * height;
if(!i)
{
bytes_per_line /= sub_h;
height /= sub_v;
}
}
return ret;
}
void gavl_get_field_format(const gavl_video_format_t * frame_format,
gavl_video_format_t * field_format,
int field)
{
gavl_video_format_copy(field_format, frame_format);
field_format->image_height /= 2;
field_format->frame_height /= 2;
if(frame_format->image_height % 2)
{
/* Top field gets an extra scanline */
if(!field)
{
field_format->image_height++;
if(field_format->frame_height < field_format->image_height)
field_format->frame_height = field_format->image_height;
}
}
}
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