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mpv/video/mp_image.c

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/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "talloc.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"
#include "video/filter/vf.h"
#include "video/memcpy_pic.h"
#include "libavutil/mem.h"
#include "libavutil/common.h"
struct m_refcount {
void *arg;
// free() is called if refcount reaches 0.
void (*free)(void *arg);
// External refcounted object (such as libavcodec DR buffers). This assumes
// that the actual data is managed by the external object, not by
// m_refcount. The .ext_* calls use that external object's refcount
// primitives. It usually doesn't make sense to set both .free and .ext_*.
void (*ext_ref)(void *arg);
void (*ext_unref)(void *arg);
bool (*ext_is_unique)(void *arg);
// Native refcount (there may be additional references if .ext_* are set)
int refcount;
};
// Only for checking API usage
static int m_refcount_destructor(void *ptr)
{
struct m_refcount *ref = ptr;
assert(ref->refcount == 0);
return 0;
}
// Starts out with refcount==1, caller can set .arg and .free and .ext_*
static struct m_refcount *m_refcount_new(void)
{
struct m_refcount *ref = talloc_ptrtype(NULL, ref);
*ref = (struct m_refcount) { .refcount = 1 };
talloc_set_destructor(ref, m_refcount_destructor);
return ref;
}
static void m_refcount_ref(struct m_refcount *ref)
{
ref->refcount++;
if (ref->ext_ref)
ref->ext_ref(ref->arg);
}
static void m_refcount_unref(struct m_refcount *ref)
{
assert(ref->refcount > 0);
if (ref->ext_unref)
ref->ext_unref(ref->arg);
ref->refcount--;
if (ref->refcount == 0) {
if (ref->free)
ref->free(ref->arg);
talloc_free(ref);
}
}
static bool m_refcount_is_unique(struct m_refcount *ref)
{
if (ref->refcount > 1)
return false;
if (ref->ext_is_unique)
return ref->ext_is_unique(ref->arg); // referenced only by us
return true;
}
void mp_image_alloc_planes(mp_image_t *mpi) {
assert(!mpi->refcount);
// IF09 - allocate space for 4. plane delta info - unused
if (mpi->imgfmt == IMGFMT_IF09) {
mpi->planes[0]=av_malloc(mpi->bpp*mpi->width*(mpi->height+2)/8+
mpi->chroma_width*mpi->chroma_height);
} else
mpi->planes[0]=av_malloc(mpi->bpp*mpi->width*(mpi->height+2)/8);
if (!mpi->planes[0])
abort(); //out of memory
if (mpi->flags&MP_IMGFLAG_PLANAR) {
// FIXME this code only supports same bpp for all planes, and bpp divisible
// by 8. Currently the case for all planar formats.
int bpp = MP_IMAGE_PLANAR_BITS_PER_PIXEL_ON_PLANE(mpi, 0) / 8;
// YV12/I420/YVU9/IF09. feel free to add other planar formats here...
mpi->stride[0]=mpi->stride[3]=bpp*mpi->width;
if(mpi->num_planes > 2){
mpi->stride[1]=mpi->stride[2]=bpp*mpi->chroma_width;
if(mpi->flags&MP_IMGFLAG_SWAPPED){
// I420/IYUV (Y,U,V)
mpi->planes[1]=mpi->planes[0]+mpi->stride[0]*mpi->height;
mpi->planes[2]=mpi->planes[1]+mpi->stride[1]*mpi->chroma_height;
if (mpi->num_planes > 3)
mpi->planes[3]=mpi->planes[2]+mpi->stride[2]*mpi->chroma_height;
} else {
// YV12,YVU9,IF09 (Y,V,U)
mpi->planes[2]=mpi->planes[0]+mpi->stride[0]*mpi->height;
mpi->planes[1]=mpi->planes[2]+mpi->stride[1]*mpi->chroma_height;
if (mpi->num_planes > 3)
mpi->planes[3]=mpi->planes[1]+mpi->stride[1]*mpi->chroma_height;
}
} else {
// NV12/NV21
mpi->stride[1]=mpi->chroma_width;
mpi->planes[1]=mpi->planes[0]+mpi->stride[0]*mpi->height;
}
} else {
mpi->stride[0]=mpi->width*mpi->bpp/8;
if (mpi->flags & MP_IMGFLAG_RGB_PALETTE)
mpi->planes[1] = av_malloc(1024);
}
mpi->flags|=MP_IMGFLAG_ALLOCATED;
}
void mp_image_copy(struct mp_image *dmpi, struct mp_image *mpi)
{
if(mpi->flags&MP_IMGFLAG_PLANAR){
memcpy_pic(dmpi->planes[0],mpi->planes[0], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 0), mpi->h,
dmpi->stride[0],mpi->stride[0]);
memcpy_pic(dmpi->planes[1],mpi->planes[1], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 1), mpi->chroma_height,
dmpi->stride[1],mpi->stride[1]);
memcpy_pic(dmpi->planes[2], mpi->planes[2], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 2), mpi->chroma_height,
dmpi->stride[2],mpi->stride[2]);
} else {
memcpy_pic(dmpi->planes[0],mpi->planes[0],
MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 0), mpi->h,
dmpi->stride[0],mpi->stride[0]);
}
}
void mp_image_copy_attributes(struct mp_image *dmpi, struct mp_image *mpi)
{
vf_clone_mpi_attributes(dmpi, mpi);
}
void mp_image_setfmt(mp_image_t* mpi,unsigned int out_fmt){
mpi->flags&=~(MP_IMGFLAG_PLANAR|MP_IMGFLAG_YUV|MP_IMGFLAG_SWAPPED);
mpi->imgfmt=out_fmt;
// compressed formats
if(IMGFMT_IS_HWACCEL(out_fmt)){
mpi->bpp=0;
return;
}
mpi->num_planes=1;
if (IMGFMT_IS_RGB(out_fmt)) {
if (IMGFMT_RGB_DEPTH(out_fmt) < 8 && !(out_fmt&128))
mpi->bpp = IMGFMT_RGB_DEPTH(out_fmt);
else
mpi->bpp=(IMGFMT_RGB_DEPTH(out_fmt)+7)&(~7);
return;
}
if (IMGFMT_IS_BGR(out_fmt)) {
if (IMGFMT_BGR_DEPTH(out_fmt) < 8 && !(out_fmt&128))
mpi->bpp = IMGFMT_BGR_DEPTH(out_fmt);
else
mpi->bpp=(IMGFMT_BGR_DEPTH(out_fmt)+7)&(~7);
mpi->flags|=MP_IMGFLAG_SWAPPED;
return;
}
switch (out_fmt) {
case IMGFMT_BGR0:
mpi->bpp = 32;
return;
}
mpi->num_planes=3;
if (out_fmt == IMGFMT_GBRP) {
mpi->bpp=24;
mpi->flags|=MP_IMGFLAG_PLANAR;
mpi->chroma_x_shift = 0;
mpi->chroma_y_shift = 0;
mpi->chroma_width=mpi->width;
mpi->chroma_height=mpi->height;
return;
}
mpi->flags|=MP_IMGFLAG_YUV;
if (mp_get_chroma_shift(out_fmt, NULL, NULL, NULL)) {
mpi->flags|=MP_IMGFLAG_PLANAR;
mpi->bpp = mp_get_chroma_shift(out_fmt, &mpi->chroma_x_shift, &mpi->chroma_y_shift, NULL);
mpi->chroma_width = mpi->width >> mpi->chroma_x_shift;
mpi->chroma_height = mpi->height >> mpi->chroma_y_shift;
}
switch(out_fmt){
case IMGFMT_I420:
case IMGFMT_IYUV:
mpi->flags|=MP_IMGFLAG_SWAPPED;
case IMGFMT_YV12:
return;
case IMGFMT_420A:
case IMGFMT_IF09:
mpi->num_planes=4;
case IMGFMT_YVU9:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
case IMGFMT_440P:
case IMGFMT_444P16_LE:
case IMGFMT_444P16_BE:
case IMGFMT_444P14_LE:
case IMGFMT_444P14_BE:
case IMGFMT_444P12_LE:
case IMGFMT_444P12_BE:
case IMGFMT_444P10_LE:
case IMGFMT_444P10_BE:
case IMGFMT_444P9_LE:
case IMGFMT_444P9_BE:
case IMGFMT_422P16_LE:
case IMGFMT_422P16_BE:
case IMGFMT_422P14_LE:
case IMGFMT_422P14_BE:
case IMGFMT_422P12_LE:
case IMGFMT_422P12_BE:
case IMGFMT_422P10_LE:
case IMGFMT_422P10_BE:
case IMGFMT_422P9_LE:
case IMGFMT_422P9_BE:
case IMGFMT_420P16_LE:
case IMGFMT_420P16_BE:
case IMGFMT_420P14_LE:
case IMGFMT_420P14_BE:
case IMGFMT_420P12_LE:
case IMGFMT_420P12_BE:
case IMGFMT_420P10_LE:
case IMGFMT_420P10_BE:
case IMGFMT_420P9_LE:
case IMGFMT_420P9_BE:
return;
case IMGFMT_Y800:
case IMGFMT_Y8:
case IMGFMT_Y16LE:
case IMGFMT_Y16BE:
/* they're planar ones, but for easier handling use them as packed */
mpi->flags&=~MP_IMGFLAG_PLANAR;
mpi->num_planes=1;
return;
case IMGFMT_UYVY:
mpi->flags|=MP_IMGFLAG_SWAPPED;
case IMGFMT_YUY2:
mpi->chroma_x_shift = 1;
mpi->chroma_y_shift = 1;
mpi->chroma_width=(mpi->width>>1);
mpi->chroma_height=(mpi->height>>1);
mpi->bpp=16;
mpi->num_planes=1;
return;
case IMGFMT_NV12:
mpi->flags|=MP_IMGFLAG_SWAPPED;
case IMGFMT_NV21:
mpi->flags|=MP_IMGFLAG_PLANAR;
mpi->bpp=12;
mpi->num_planes=2;
mpi->chroma_width=(mpi->width>>0);
mpi->chroma_height=(mpi->height>>1);
mpi->chroma_x_shift=0;
mpi->chroma_y_shift=1;
return;
}
mp_msg(MSGT_DECVIDEO,MSGL_WARN,"mp_image: unknown out_fmt: 0x%X\n",out_fmt);
mpi->bpp=0;
}
static int mp_image_destructor(void *ptr)
{
mp_image_t *mpi = ptr;
if (mpi->refcount) {
m_refcount_unref(mpi->refcount);
}
if (mpi->flags & MP_IMGFLAG_ALLOCATED) {
/* because we allocate the whole image at once */
av_free(mpi->planes[0]);
if (mpi->flags & MP_IMGFLAG_RGB_PALETTE)
av_free(mpi->planes[1]);
}
return 0;
}
// Image without format or allocated image data
struct mp_image *mp_image_new_empty(int w, int h)
{
struct mp_image *mpi = talloc_zero(NULL, struct mp_image);
talloc_set_destructor(mpi, mp_image_destructor);
mpi->width=mpi->w=w;
mpi->height=mpi->h=h;
return mpi;
}
struct mp_image *mp_image_alloc(unsigned int imgfmt, int w, int h)
{
struct mp_image *mpi = mp_image_new_empty(w, h);
mpi->width = FFALIGN(w, MP_STRIDE_ALIGNMENT);
mp_image_setfmt(mpi, imgfmt);
mp_image_alloc_planes(mpi);
mpi->width = w;
mp_image_setfmt(mpi, imgfmt); // reset chroma size
mpi->flags &= ~MP_IMGFLAG_ALLOCATED;
mpi->refcount = m_refcount_new();
mpi->refcount->free = av_free;
mpi->refcount->arg = mpi->planes[0];
// NOTE: palette isn't free'd. Palette handling should be fixed instead.
return mpi;
}
struct mp_image *mp_image_new_copy(struct mp_image *img)
{
struct mp_image *new = mp_image_alloc(img->imgfmt, img->w, img->h);
mp_image_copy(new, img);
mp_image_copy_attributes(new, img);
// Normally these are covered by the reference to the original image data
// (like the AVFrame in vd_lavc.c), but we can't manage it on our own.
new->qscale = NULL;
new->qstride = 0;
return new;
}
// Make dst take over the image data of src, and free src.
// This is basically a safe version of *dst = *src; free(src);
// Only works with ref-counted images, and can't change image size/format.
void mp_image_steal_data(struct mp_image *dst, struct mp_image *src)
{
assert(dst->imgfmt == src->imgfmt && dst->w == src->w && dst->h == src->h);
assert(dst->refcount && src->refcount);
for (int p = 0; p < MP_MAX_PLANES; p++) {
dst->planes[p] = src->planes[p];
dst->stride[p] = src->stride[p];
}
mp_image_copy_attributes(dst, src);
m_refcount_unref(dst->refcount);
dst->refcount = src->refcount;
talloc_set_destructor(src, NULL);
talloc_free(src);
}
// Return a new reference to img. The returned reference is owned by the caller,
// while img is left untouched.
struct mp_image *mp_image_new_ref(struct mp_image *img)
{
if (!img->refcount)
return mp_image_new_copy(img);
struct mp_image *new = talloc_ptrtype(NULL, new);
talloc_set_destructor(new, mp_image_destructor);
*new = *img;
m_refcount_ref(new->refcount);
return new;
}
// Return a reference counted reference to img. If the reference count reaches
// 0, call free(free_arg). The data passed by img must not be free'd before
// that. The new reference will be writeable.
struct mp_image *mp_image_new_custom_ref(struct mp_image *img, void *free_arg,
void (*free)(void *arg))
{
struct mp_image *new = talloc_ptrtype(NULL, new);
talloc_set_destructor(new, mp_image_destructor);
*new = *img;
new->flags &= ~MP_IMGFLAG_ALLOCATED;
new->refcount = m_refcount_new();
new->refcount->free = free;
new->refcount->arg = free_arg;
return new;
}
// Return a reference counted reference to img. ref/unref/is_unique are used to
// connect to an external refcounting API. It is assumed that the new object
// has an initial reference to that external API.
struct mp_image *mp_image_new_external_ref(struct mp_image *img, void *arg,
void (*ref)(void *arg),
void (*unref)(void *arg),
bool (*is_unique)(void *arg))
{
struct mp_image *new = talloc_ptrtype(NULL, new);
talloc_set_destructor(new, mp_image_destructor);
*new = *img;
new->flags &= ~MP_IMGFLAG_ALLOCATED;
new->refcount = m_refcount_new();
new->refcount->ext_ref = ref;
new->refcount->ext_unref = unref;
new->refcount->ext_is_unique = is_unique;
new->refcount->arg = arg;
return new;
}
bool mp_image_is_writeable(struct mp_image *img)
{
// if non ref-counted, it's writeable if the caller allocated the image
if (!img->refcount)
return img->flags & MP_IMGFLAG_ALLOCATED;
return m_refcount_is_unique(img->refcount);
}
// Make the image data referenced by img writeable. This allocates new data
// if the data wasn't already writeable, and img->planes[] and img->stride[]
// will be set to the copy.
void mp_image_make_writeable(struct mp_image *img)
{
if (mp_image_is_writeable(img))
return;
mp_image_steal_data(img, mp_image_new_copy(img));
assert(mp_image_is_writeable(img));
}
void mp_image_setrefp(struct mp_image **p_img, struct mp_image *new_value)
{
if (*p_img != new_value) {
talloc_free(*p_img);
*p_img = new_value ? mp_image_new_ref(new_value) : NULL;
}
}
// Mere helper function (mp_image can be directly free'd with talloc_free)
void mp_image_unrefp(struct mp_image **p_img)
{
talloc_free(*p_img);
*p_img = NULL;
}
enum mp_csp mp_image_csp(struct mp_image *img)
{
if (img->colorspace != MP_CSP_AUTO)
return img->colorspace;
return (img->flags & MP_IMGFLAG_YUV) ? MP_CSP_BT_601 : MP_CSP_RGB;
}
enum mp_csp_levels mp_image_levels(struct mp_image *img)
{
if (img->levels != MP_CSP_LEVELS_AUTO)
return img->levels;
return (img->flags & MP_IMGFLAG_YUV) ? MP_CSP_LEVELS_TV : MP_CSP_LEVELS_PC;
}
void mp_image_set_colorspace_details(struct mp_image *image,
struct mp_csp_details *csp)
{
if (image->flags & MP_IMGFLAG_YUV) {
image->colorspace = csp->format;
if (image->colorspace == MP_CSP_AUTO)
image->colorspace = MP_CSP_BT_601;
image->levels = csp->levels_in;
if (image->levels == MP_CSP_LEVELS_AUTO)
image->levels = MP_CSP_LEVELS_TV;
} else {
image->colorspace = MP_CSP_RGB;
image->levels = MP_CSP_LEVELS_PC;
}
}
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