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mpv/video/img_format.c
wm4 3973a953df sub: find GBRP format automatically when rendering to RGB 
This removes the need to define IMGFMT_GBRAP, which fixes compilation
with the current Libav release.

This also makes it automatically pick up a GBRP format with the same bit
width. (Unfortunately, it seems libswscale does not support conversion
to AV_PIX_FMT_GBRAP16, so our code falls back to 8 bit, removing
precision for video covered by subtitles in cases this code is used.)

Also, when the source video is e.g. 10 bit YUV, upsample to 16 bit.
Whether this is good or bad, it fixes behavior with alpha. Although I'm
not sure if the alpha range is really correct ([0,2^16-1] vs.
[0,255*256]). Keep in mind that libswscale doesn't even agree with the
way we do it.
2015-12-24 16:42:21 +01:00

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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <string.h>
#include <libavcodec/avcodec.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
#include "config.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/fmt-conversion.h"
struct mp_imgfmt_entry {
const char *name;
int fmt;
};
static const struct mp_imgfmt_entry mp_imgfmt_list[] = {
// not in ffmpeg
{"vdpau_output", IMGFMT_VDPAU_OUTPUT},
// FFmpeg names have an annoying "_vld" suffix
{"videotoolbox", IMGFMT_VIDEOTOOLBOX},
{"vaapi", IMGFMT_VAAPI},
// names below this are not preferred over the FFmpeg names
// the "none" entry makes mp_imgfmt_to_name prefer FFmpeg names
{"none", 0},
// endian-specific aliases (not in FFmpeg)
{"rgb32", IMGFMT_RGB32},
{"bgr32", IMGFMT_BGR32},
// old names we keep around
{"y8", IMGFMT_Y8},
{"420p", IMGFMT_420P},
{"yv12", IMGFMT_420P},
{"420p16", IMGFMT_420P16},
{"420p10", IMGFMT_420P10},
{"444p", IMGFMT_444P},
{"444p9", IMGFMT_444P9},
{"444p10", IMGFMT_444P10},
{"422p", IMGFMT_422P},
{"422p9", IMGFMT_422P9},
{"422p10", IMGFMT_422P10},
{0}
};
char **mp_imgfmt_name_list(void)
{
int count = IMGFMT_END - IMGFMT_START;
char **list = talloc_zero_array(NULL, char *, count + 1);
int num = 0;
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
const char *name = mp_imgfmt_to_name(n);
if (strcmp(name, "none") != 0 && strcmp(name, "unknown") != 0)
list[num++] = talloc_strdup(list, name);
}
return list;
}
int mp_imgfmt_from_name(bstr name, bool allow_hwaccel)
{
int img_fmt = 0;
for (const struct mp_imgfmt_entry *p = mp_imgfmt_list; p->name; ++p) {
if (bstr_equals0(name, p->name)) {
img_fmt = p->fmt;
break;
}
}
if (!img_fmt) {
char *t = bstrdup0(NULL, name);
img_fmt = pixfmt2imgfmt(av_get_pix_fmt(t));
talloc_free(t);
}
if (!allow_hwaccel && IMGFMT_IS_HWACCEL(img_fmt))
return 0;
return img_fmt;
}
char *mp_imgfmt_to_name_buf(char *buf, size_t buf_size, int fmt)
{
const char *name = NULL;
const struct mp_imgfmt_entry *p = mp_imgfmt_list;
for (; p->fmt; p++) {
if (p->name && p->fmt == fmt) {
name = p->name;
break;
}
}
if (!name) {
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(imgfmt2pixfmt(fmt));
if (pixdesc)
name = pixdesc->name;
}
if (!name)
name = "unknown";
snprintf(buf, buf_size, "%s", name);
int len = strlen(buf);
if (len > 2 && buf[len - 2] == MP_SELECT_LE_BE('l', 'b') && buf[len - 1] == 'e')
buf[len - 2] = '\0';
return buf;
}
static struct mp_imgfmt_desc mp_only_imgfmt_desc(int mpfmt)
{
switch (mpfmt) {
case IMGFMT_VDPAU_OUTPUT:
return (struct mp_imgfmt_desc) {
.id = mpfmt,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BE | MP_IMGFLAG_LE | MP_IMGFLAG_RGB |
MP_IMGFLAG_HWACCEL,
};
}
return (struct mp_imgfmt_desc) {0};
}
struct mp_imgfmt_desc mp_imgfmt_get_desc(int mpfmt)
{
enum AVPixelFormat fmt = imgfmt2pixfmt(mpfmt);
const AVPixFmtDescriptor *pd = av_pix_fmt_desc_get(fmt);
if (!pd || pd->nb_components > 4 || fmt == AV_PIX_FMT_NONE ||
fmt == AV_PIX_FMT_UYYVYY411)
return mp_only_imgfmt_desc(mpfmt);
struct mp_imgfmt_desc desc = {
.id = mpfmt,
.avformat = fmt,
.chroma_xs = pd->log2_chroma_w,
.chroma_ys = pd->log2_chroma_h,
};
int planedepth[4] = {0};
int el_size = (pd->flags & AV_PIX_FMT_FLAG_BITSTREAM) ? 1 : 8;
bool need_endian = false; // single component is spread over >1 bytes
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
#if HAVE_AV_NEW_PIXDESC
int depth = d.depth;
int step = d.step;
#else
int depth = d.depth_minus1 + 1;
int step = d.step_minus1 + 1;
#endif
// multiple components per plane -> Y is definitive, ignore chroma
if (!desc.bpp[d.plane])
desc.bpp[d.plane] = step * el_size;
planedepth[d.plane] += depth;
need_endian |= (depth + d.shift) > 8;
if (c == 0)
desc.component_bits = depth;
if (depth != desc.component_bits)
desc.component_bits = 0;
}
for (int p = 0; p < 4; p++) {
if (desc.bpp[p])
desc.num_planes++;
}
desc.plane_bits = planedepth[0];
desc.component_full_bits = desc.component_bits;
// Check whether any components overlap other components (per plane).
// We're cheating/simplifying here: we assume that this happens if a shift
// is set - which is wrong in general (could be needed for padding, instead
// of overlapping bits of another component). Needed for rgb444le/be.
bool component_byte_overlap = false;
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
component_byte_overlap |= d.shift > 0 && planedepth[d.plane] > 8;
}
// If every component sits in its own byte, or all components are within
// a single byte, no endian-dependent access is needed. If components
// stride bytes (like with packed 2 byte RGB formats), endian-dependent
// access is needed.
need_endian |= component_byte_overlap;
if (!need_endian) {
desc.flags |= MP_IMGFLAG_LE | MP_IMGFLAG_BE;
} else {
desc.flags |= (pd->flags & AV_PIX_FMT_FLAG_BE)
? MP_IMGFLAG_BE : MP_IMGFLAG_LE;
}
if (fmt == AV_PIX_FMT_XYZ12LE || fmt == AV_PIX_FMT_XYZ12BE) {
desc.flags |= MP_IMGFLAG_XYZ;
} else if (!(pd->flags & AV_PIX_FMT_FLAG_RGB) &&
fmt != AV_PIX_FMT_MONOBLACK &&
fmt != AV_PIX_FMT_PAL8)
{
desc.flags |= MP_IMGFLAG_YUV;
} else {
desc.flags |= MP_IMGFLAG_RGB;
}
if (pd->flags & AV_PIX_FMT_FLAG_ALPHA)
desc.flags |= MP_IMGFLAG_ALPHA;
if (mpfmt >= IMGFMT_RGB0_START && mpfmt <= IMGFMT_RGB0_END)
desc.flags &= ~MP_IMGFLAG_ALPHA;
if (desc.num_planes == pd->nb_components)
desc.flags |= MP_IMGFLAG_PLANAR;
if (!(pd->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
!(pd->flags & AV_PIX_FMT_FLAG_BITSTREAM))
{
desc.flags |= MP_IMGFLAG_BYTE_ALIGNED;
for (int p = 0; p < desc.num_planes; p++)
desc.bytes[p] = desc.bpp[p] / 8;
}
// PSEUDOPAL is a complete braindeath nightmare, however it seems various
// parts of FFmpeg expect that it has a palette allocated.
if (pd->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL))
desc.flags |= MP_IMGFLAG_PAL;
if ((desc.flags & (MP_IMGFLAG_YUV | MP_IMGFLAG_RGB))
&& (desc.flags & MP_IMGFLAG_BYTE_ALIGNED)
&& !(pd->flags & AV_PIX_FMT_FLAG_PAL))
{
bool same_depth = true;
for (int p = 0; p < desc.num_planes; p++) {
same_depth &= planedepth[p] == planedepth[0] &&
desc.bpp[p] == desc.bpp[0];
}
if (same_depth && pd->nb_components == desc.num_planes) {
desc.component_full_bits = (desc.component_bits + 7) / 8 * 8;
if (desc.flags & MP_IMGFLAG_YUV) {
desc.flags |= MP_IMGFLAG_YUV_P;
} else {
desc.flags |= MP_IMGFLAG_RGB_P;
}
}
}
for (int p = 0; p < desc.num_planes; p++) {
desc.xs[p] = (p == 1 || p == 2) ? desc.chroma_xs : 0;
desc.ys[p] = (p == 1 || p == 2) ? desc.chroma_ys : 0;
}
desc.align_x = 1 << desc.chroma_xs;
desc.align_y = 1 << desc.chroma_ys;
if ((desc.bpp[0] % 8) != 0)
desc.align_x = 8 / desc.bpp[0]; // expect power of 2
if (pd->flags & AV_PIX_FMT_FLAG_HWACCEL) {
desc.flags |= MP_IMGFLAG_HWACCEL;
desc.component_bits = 8; // usually restricted to 8 bit; may change
desc.component_full_bits = desc.component_bits;
desc.plane_bits = desc.component_bits;
}
if (desc.chroma_xs || desc.chroma_ys)
desc.flags |= MP_IMGFLAG_SUBSAMPLED;
return desc;
}
// Find a format that has the given flags set with the following configuration.
int mp_imgfmt_find(int xs, int ys, int planes, int component_bits, int flags)
{
for (int n = IMGFMT_START + 1; n < IMGFMT_END; n++) {
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(n);
if (desc.id && ((desc.flags & flags) == flags)) {
if (desc.num_planes == planes && desc.chroma_xs == xs &&
desc.chroma_ys == ys && desc.plane_bits == component_bits &&
(desc.flags & MP_IMGFLAG_NE))
return desc.id;
}
}
return 0;
}
#if LIBAVUTIL_VERSION_MICRO < 100
#define avcodec_find_best_pix_fmt_of_list avcodec_find_best_pix_fmt2
#endif
// Compare the dst image formats, and return the one which can carry more data
// (e.g. higher depth, more color components, lower chroma subsampling, etc.),
// with respect to what is required to keep most of the src format.
// Returns the imgfmt, or 0 on error.
int mp_imgfmt_select_best(int dst1, int dst2, int src)
{
enum AVPixelFormat dst1pxf = imgfmt2pixfmt(dst1);
enum AVPixelFormat dst2pxf = imgfmt2pixfmt(dst2);
enum AVPixelFormat srcpxf = imgfmt2pixfmt(src);
enum AVPixelFormat dstlist[] = {dst1pxf, dst2pxf, AV_PIX_FMT_NONE};
return pixfmt2imgfmt(avcodec_find_best_pix_fmt_of_list(dstlist, srcpxf, 1, 0));
}
#if 0
#include <libavutil/frame.h>
#include "sws_utils.h"
int main(int argc, char **argv)
{
const AVPixFmtDescriptor *avd = av_pix_fmt_desc_next(NULL);
for (; avd; avd = av_pix_fmt_desc_next(avd)) {
enum AVPixelFormat fmt = av_pix_fmt_desc_get_id(avd);
if (fmt == AV_PIX_FMT_YUVJ420P || fmt == AV_PIX_FMT_YUVJ422P ||
fmt == AV_PIX_FMT_YUVJ444P || fmt == AV_PIX_FMT_YUVJ440P)
continue;
printf("%s (%d)", avd->name, (int)fmt);
int mpfmt = pixfmt2imgfmt(fmt);
bool generic = mpfmt >= IMGFMT_AVPIXFMT_START &&
mpfmt < IMGFMT_AVPIXFMT_END;
printf(" mp=%d%s\n ", mpfmt, generic ? " [GENERIC]" : "");
struct mp_imgfmt_desc d = mp_imgfmt_get_desc(mpfmt);
if (d.id)
assert(d.avformat == fmt);
#define FLAG(t, c) if (d.flags & (t)) printf("[%s]", c);
FLAG(MP_IMGFLAG_BYTE_ALIGNED, "BA")
FLAG(MP_IMGFLAG_ALPHA, "a")
FLAG(MP_IMGFLAG_PLANAR, "P")
FLAG(MP_IMGFLAG_YUV_P, "YUVP")
FLAG(MP_IMGFLAG_YUV, "yuv")
FLAG(MP_IMGFLAG_RGB, "rgb")
FLAG(MP_IMGFLAG_XYZ, "xyz")
FLAG(MP_IMGFLAG_LE, "le")
FLAG(MP_IMGFLAG_BE, "be")
FLAG(MP_IMGFLAG_PAL, "pal")
FLAG(MP_IMGFLAG_HWACCEL, "hw")
printf("\n");
printf(" planes=%d, chroma=%d:%d align=%d:%d bits=%d cbits=%d\n",
d.num_planes, d.chroma_xs, d.chroma_ys, d.align_x, d.align_y,
d.plane_bits, d.component_bits);
printf(" {");
for (int n = 0; n < MP_MAX_PLANES; n++)
printf("%d/%d/[%d:%d] ", d.bytes[n], d.bpp[n], d.xs[n], d.ys[n]);
printf("}\n");
if (mpfmt && !(d.flags & MP_IMGFLAG_HWACCEL) && fmt != AV_PIX_FMT_UYYVYY411)
{
AVFrame *fr = av_frame_alloc();
fr->format = fmt;
fr->width = 128;
fr->height = 128;
int err = av_frame_get_buffer(fr, SWS_MIN_BYTE_ALIGN);
assert(err >= 0);
struct mp_image *mpi = mp_image_alloc(mpfmt, fr->width, fr->height);
assert(mpi);
// A rather fuzzy test, which might fail even if there's no bug.
for (int n = 0; n < 4; n++) {
assert(!!mpi->planes[n] == !!fr->data[n]);
assert(mpi->stride[n] == fr->linesize[n]);
}
talloc_free(mpi);
av_frame_free(&fr);
}
}
}
#endif
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