mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-26 09:12:33 +00:00
64ad44a381
This brings our generation of the vpcC box up to date to version 1.0 of the VP Codec ISO Media File Format Binding. Specifically, color/transfer properties are now written with values based on ISO/IEC 23001-8, which is the same reference specification the AVColor* enumerations are based on.
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2016 Google Inc.
|
|
* Copyright (c) 2016 KongQun Yang (kqyang@google.com)
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/pixfmt.h"
|
|
#include "vpcc.h"
|
|
|
|
enum VPX_CHROMA_SUBSAMPLING
|
|
{
|
|
VPX_SUBSAMPLING_420_VERTICAL = 0,
|
|
VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA = 1,
|
|
VPX_SUBSAMPLING_422 = 2,
|
|
VPX_SUBSAMPLING_444 = 3,
|
|
};
|
|
|
|
static int get_vpx_chroma_subsampling(AVFormatContext *s,
|
|
enum AVPixelFormat pixel_format,
|
|
enum AVChromaLocation chroma_location)
|
|
{
|
|
int chroma_w, chroma_h;
|
|
if (av_pix_fmt_get_chroma_sub_sample(pixel_format, &chroma_w, &chroma_h) == 0) {
|
|
if (chroma_w == 1 && chroma_h == 1) {
|
|
return (chroma_location == AVCHROMA_LOC_LEFT)
|
|
? VPX_SUBSAMPLING_420_VERTICAL
|
|
: VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA;
|
|
} else if (chroma_w == 1 && chroma_h == 0) {
|
|
return VPX_SUBSAMPLING_422;
|
|
} else if (chroma_w == 0 && chroma_h == 0) {
|
|
return VPX_SUBSAMPLING_444;
|
|
}
|
|
}
|
|
av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n", pixel_format);
|
|
return -1;
|
|
}
|
|
|
|
static int get_bit_depth(AVFormatContext *s, enum AVPixelFormat pixel_format)
|
|
{
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pixel_format);
|
|
if (desc == NULL) {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n",
|
|
pixel_format);
|
|
return -1;
|
|
}
|
|
return desc->comp[0].depth;
|
|
}
|
|
|
|
static int get_vpx_video_full_range_flag(enum AVColorRange color_range)
|
|
{
|
|
return color_range == AVCOL_RANGE_JPEG;
|
|
}
|
|
|
|
int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
|
|
AVCodecParameters *par)
|
|
{
|
|
int profile = par->profile;
|
|
int level = par->level == FF_LEVEL_UNKNOWN ? 0 : par->level;
|
|
int bit_depth = get_bit_depth(s, par->format);
|
|
int vpx_chroma_subsampling =
|
|
get_vpx_chroma_subsampling(s, par->format, par->chroma_location);
|
|
int vpx_video_full_range_flag =
|
|
get_vpx_video_full_range_flag(par->color_range);
|
|
|
|
if (bit_depth < 0 || vpx_chroma_subsampling < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (profile == FF_PROFILE_UNKNOWN) {
|
|
if (vpx_chroma_subsampling == VPX_SUBSAMPLING_420_VERTICAL ||
|
|
vpx_chroma_subsampling == VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA) {
|
|
profile = (bit_depth == 8) ? FF_PROFILE_VP9_0 : FF_PROFILE_VP9_2;
|
|
} else {
|
|
profile = (bit_depth == 8) ? FF_PROFILE_VP9_1 : FF_PROFILE_VP9_3;
|
|
}
|
|
}
|
|
|
|
avio_w8(pb, profile);
|
|
avio_w8(pb, level);
|
|
avio_w8(pb, (bit_depth << 4) | (vpx_chroma_subsampling << 1) | vpx_video_full_range_flag);
|
|
avio_w8(pb, par->color_primaries);
|
|
avio_w8(pb, par->color_trc);
|
|
avio_w8(pb, par->color_space);
|
|
|
|
// vp9 does not have codec initialization data.
|
|
avio_wb16(pb, 0);
|
|
return 0;
|
|
}
|