diff options
Diffstat (limited to 'libavformat/vpcc.c')
| -rw-r--r-- | libavformat/vpcc.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/libavformat/vpcc.c b/libavformat/vpcc.c new file mode 100644 index 0000000000..2390e1711c --- /dev/null +++ b/libavformat/vpcc.c @@ -0,0 +1,148 @@ +/* + * 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 VpxColorSpace +{ + VPX_COLOR_SPACE_UNSPECIFIED = 0, + VPX_COLOR_SPACE_BT601 = 1, + VPX_COLOR_SPACE_BT709 = 2, + VPX_COLOR_SPACE_SMPTE_170 = 3, + VPX_COLOR_SPACE_SMPTE_240 = 4, + VPX_COLOR_SPACE_BT2020_NCL = 5, + VPX_COLOR_SPACE_BT2020_CL = 6, + VPX_COLOR_SPACE_RGB = 7, +}; + +static int get_vpx_color_space(AVFormatContext *s, + enum AVColorSpace color_space) +{ + switch (color_space) { + case AVCOL_SPC_RGB: + return VPX_COLOR_SPACE_RGB; + case AVCOL_SPC_BT709: + return VPX_COLOR_SPACE_BT709; + case AVCOL_SPC_UNSPECIFIED: + return VPX_COLOR_SPACE_UNSPECIFIED; + case AVCOL_SPC_BT470BG: + return VPX_COLOR_SPACE_BT601; + case AVCOL_SPC_SMPTE170M: + return VPX_COLOR_SPACE_SMPTE_170; + case AVCOL_SPC_SMPTE240M: + return VPX_COLOR_SPACE_SMPTE_240; + case AVCOL_SPC_BT2020_NCL: + return VPX_COLOR_SPACE_BT2020_NCL; + case AVCOL_SPC_BT2020_CL: + return VPX_COLOR_SPACE_BT2020_CL; + default: + av_log(s, AV_LOG_ERROR, "Unsupported color space (%d)\n", color_space); + return -1; + } +} + +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_transfer_function( + enum AVColorTransferCharacteristic transfer) +{ + return transfer == AVCOL_TRC_SMPTEST2084; +} + +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_color_space = get_vpx_color_space(s, par->color_space); + int vpx_chroma_subsampling = + get_vpx_chroma_subsampling(s, par->format, par->chroma_location); + int vpx_transfer_function = get_vpx_transfer_function(par->color_trc); + int vpx_video_full_range_flag = + get_vpx_video_full_range_flag(par->color_range); + + if (bit_depth < 0 || vpx_color_space < 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_color_space); + avio_w8(pb, (vpx_chroma_subsampling << 4) | (vpx_transfer_function << 1) | + vpx_video_full_range_flag); + + // vp9 does not have codec initialization data. + avio_wb16(pb, 0); + return 0; +} |