6ce9b4310c
av_check_image_size() instead. Originally committed as revision 24711 to svn://svn.ffmpeg.org/ffmpeg/trunk
286 lines
9.5 KiB
C
286 lines
9.5 KiB
C
/*
|
|
* Copyright (C) 2007 Marco Gerards <marco@gnu.org>
|
|
* Copyright (C) 2009 David Conrad
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Dirac Decoder
|
|
* @author Marco Gerards <marco@gnu.org>
|
|
*/
|
|
|
|
#include "libavcore/imgutils.h"
|
|
#include "dirac.h"
|
|
#include "avcodec.h"
|
|
#include "golomb.h"
|
|
#include "mpeg12data.h"
|
|
|
|
// defaults for source parameters
|
|
static const dirac_source_params dirac_source_parameters_defaults[] = {
|
|
{ 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
|
|
{ 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
|
|
{ 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
|
|
{ 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
|
|
{ 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
|
|
{ 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
|
|
{ 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
|
|
{ 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
|
|
{ 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
|
|
|
|
{ 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
|
|
{ 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
|
|
{ 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
|
|
{ 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
|
|
{ 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
|
|
{ 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
|
|
{ 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
|
|
{ 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
|
|
|
|
{ 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
|
|
{ 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
|
|
{ 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
|
|
{ 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
|
|
};
|
|
|
|
static const AVRational dirac_preset_aspect_ratios[] = {
|
|
{1, 1},
|
|
{10, 11},
|
|
{12, 11},
|
|
{40, 33},
|
|
{16, 11},
|
|
{4, 3},
|
|
};
|
|
|
|
static const AVRational dirac_frame_rate[] = {
|
|
{15000, 1001},
|
|
{25, 2},
|
|
};
|
|
|
|
static const struct {
|
|
uint8_t bitdepth;
|
|
enum AVColorRange color_range;
|
|
} pixel_range_presets[] = {
|
|
{8, AVCOL_RANGE_JPEG},
|
|
{8, AVCOL_RANGE_MPEG},
|
|
{10, AVCOL_RANGE_MPEG},
|
|
{12, AVCOL_RANGE_MPEG},
|
|
};
|
|
|
|
static const enum AVColorPrimaries dirac_primaries[] = {
|
|
AVCOL_PRI_BT709,
|
|
AVCOL_PRI_SMPTE170M,
|
|
AVCOL_PRI_BT470BG,
|
|
};
|
|
|
|
static const struct {
|
|
enum AVColorPrimaries color_primaries;
|
|
enum AVColorSpace colorspace;
|
|
enum AVColorTransferCharacteristic color_trc;
|
|
} dirac_color_presets[] = {
|
|
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
|
|
{ AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
|
|
{ AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
|
|
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
|
|
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
|
|
};
|
|
|
|
static const enum PixelFormat dirac_pix_fmt[2][3] = {
|
|
{ PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P },
|
|
{ PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P },
|
|
};
|
|
|
|
static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
|
|
dirac_source_params *source)
|
|
{
|
|
AVRational frame_rate = (AVRational){0,0};
|
|
unsigned luma_depth = 8, luma_offset = 16;
|
|
int idx;
|
|
|
|
if (get_bits1(gb)) {
|
|
source->width = svq3_get_ue_golomb(gb);
|
|
source->height = svq3_get_ue_golomb(gb);
|
|
}
|
|
|
|
// chroma subsampling
|
|
if (get_bits1(gb))
|
|
source->chroma_format = svq3_get_ue_golomb(gb);
|
|
if (source->chroma_format > 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
|
|
source->chroma_format);
|
|
return -1;
|
|
}
|
|
|
|
if (get_bits1(gb))
|
|
source->interlaced = svq3_get_ue_golomb(gb);
|
|
if (source->interlaced > 1)
|
|
return -1;
|
|
|
|
// frame rate
|
|
if (get_bits1(gb)) {
|
|
source->frame_rate_index = svq3_get_ue_golomb(gb);
|
|
|
|
if (source->frame_rate_index > 10)
|
|
return -1;
|
|
|
|
if (!source->frame_rate_index) {
|
|
frame_rate.num = svq3_get_ue_golomb(gb);
|
|
frame_rate.den = svq3_get_ue_golomb(gb);
|
|
}
|
|
}
|
|
if (source->frame_rate_index > 0) {
|
|
if (source->frame_rate_index <= 8)
|
|
frame_rate = ff_frame_rate_tab[source->frame_rate_index];
|
|
else
|
|
frame_rate = dirac_frame_rate[source->frame_rate_index-9];
|
|
}
|
|
av_reduce(&avctx->time_base.num, &avctx->time_base.den,
|
|
frame_rate.den, frame_rate.num, 1<<30);
|
|
|
|
// aspect ratio
|
|
if (get_bits1(gb)) {
|
|
source->aspect_ratio_index = svq3_get_ue_golomb(gb);
|
|
|
|
if (source->aspect_ratio_index > 6)
|
|
return -1;
|
|
|
|
if (!source->aspect_ratio_index) {
|
|
avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb);
|
|
avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb);
|
|
}
|
|
}
|
|
if (source->aspect_ratio_index > 0)
|
|
avctx->sample_aspect_ratio =
|
|
dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
|
|
|
|
if (get_bits1(gb)) {
|
|
source->clean_width = svq3_get_ue_golomb(gb);
|
|
source->clean_height = svq3_get_ue_golomb(gb);
|
|
source->clean_left_offset = svq3_get_ue_golomb(gb);
|
|
source->clean_right_offset = svq3_get_ue_golomb(gb);
|
|
}
|
|
|
|
// Override signal range.
|
|
if (get_bits1(gb)) {
|
|
source->pixel_range_index = svq3_get_ue_golomb(gb);
|
|
|
|
if (source->pixel_range_index > 4)
|
|
return -1;
|
|
|
|
// This assumes either fullrange or MPEG levels only
|
|
if (!source->pixel_range_index) {
|
|
luma_offset = svq3_get_ue_golomb(gb);
|
|
luma_depth = av_log2(svq3_get_ue_golomb(gb))+1;
|
|
svq3_get_ue_golomb(gb); // chroma offset
|
|
svq3_get_ue_golomb(gb); // chroma excursion
|
|
|
|
avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
|
|
}
|
|
}
|
|
if (source->pixel_range_index > 0) {
|
|
idx = source->pixel_range_index-1;
|
|
luma_depth = pixel_range_presets[idx].bitdepth;
|
|
avctx->color_range = pixel_range_presets[idx].color_range;
|
|
}
|
|
|
|
if (luma_depth > 8)
|
|
av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
|
|
|
|
avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
|
|
|
|
// color spec
|
|
if (get_bits1(gb)) {
|
|
idx = source->color_spec_index = svq3_get_ue_golomb(gb);
|
|
|
|
if (source->color_spec_index > 4)
|
|
return -1;
|
|
|
|
avctx->color_primaries = dirac_color_presets[idx].color_primaries;
|
|
avctx->colorspace = dirac_color_presets[idx].colorspace;
|
|
avctx->color_trc = dirac_color_presets[idx].color_trc;
|
|
|
|
if (!source->color_spec_index) {
|
|
if (get_bits1(gb)) {
|
|
idx = svq3_get_ue_golomb(gb);
|
|
if (idx < 3)
|
|
avctx->color_primaries = dirac_primaries[idx];
|
|
}
|
|
|
|
if (get_bits1(gb)) {
|
|
idx = svq3_get_ue_golomb(gb);
|
|
if (!idx)
|
|
avctx->colorspace = AVCOL_SPC_BT709;
|
|
else if (idx == 1)
|
|
avctx->colorspace = AVCOL_SPC_BT470BG;
|
|
}
|
|
|
|
if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
|
|
avctx->color_trc = AVCOL_TRC_BT709;
|
|
}
|
|
} else {
|
|
idx = source->color_spec_index;
|
|
avctx->color_primaries = dirac_color_presets[idx].color_primaries;
|
|
avctx->colorspace = dirac_color_presets[idx].colorspace;
|
|
avctx->color_trc = dirac_color_presets[idx].color_trc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
|
|
dirac_source_params *source)
|
|
{
|
|
unsigned version_major, version_minor;
|
|
unsigned video_format, picture_coding_mode;
|
|
|
|
version_major = svq3_get_ue_golomb(gb);
|
|
version_minor = svq3_get_ue_golomb(gb);
|
|
avctx->profile = svq3_get_ue_golomb(gb);
|
|
avctx->level = svq3_get_ue_golomb(gb);
|
|
video_format = svq3_get_ue_golomb(gb);
|
|
|
|
if (version_major < 2)
|
|
av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
|
|
else if (version_major > 2)
|
|
av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
|
|
|
|
if (video_format > 20)
|
|
return -1;
|
|
|
|
// Fill in defaults for the source parameters.
|
|
*source = dirac_source_parameters_defaults[video_format];
|
|
|
|
// Override the defaults.
|
|
if (parse_source_parameters(avctx, gb, source))
|
|
return -1;
|
|
|
|
if (av_check_image_size(source->width, source->height, 0, avctx))
|
|
return -1;
|
|
|
|
avcodec_set_dimensions(avctx, source->width, source->height);
|
|
|
|
// currently only used to signal field coding
|
|
picture_coding_mode = svq3_get_ue_golomb(gb);
|
|
if (picture_coding_mode != 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
|
|
picture_coding_mode);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|