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Diffstat (limited to 'ffmpeg/libavcodec/dirac.c')
-rw-r--r--ffmpeg/libavcodec/dirac.c334
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diff --git a/ffmpeg/libavcodec/dirac.c b/ffmpeg/libavcodec/dirac.c
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--- a/ffmpeg/libavcodec/dirac.c
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-/*
- * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
- * Copyright (C) 2009 David Conrad
- * Copyright (C) 2011 Jordi Ortiz
- *
- * 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>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
- */
-
-#include "libavutil/imgutils.h"
-#include "dirac.h"
-#include "avcodec.h"
-#include "golomb.h"
-#include "internal.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 },
-};
-
-/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
-static const AVRational dirac_preset_aspect_ratios[] = {
- {1, 1},
- {10, 11},
- {12, 11},
- {40, 33},
- {16, 11},
- {4, 3},
-};
-
-/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
- * Table 10.3 Available preset frame rate values
- */
-static const AVRational dirac_frame_rate[] = {
- {15000, 1001},
- {25, 2},
-};
-
-/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
- * range presets */
-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 */ },
-};
-
-/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
-static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
- { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
- { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P },
-};
-
-/* [DIRAC_STD] 10.3 Parse Source Parameters.
- * source_parameters(base_video_format) */
-static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
- dirac_source_params *source)
-{
- AVRational frame_rate = {0,0};
- unsigned luma_depth = 8, luma_offset = 16;
- int idx;
- int chroma_x_shift, chroma_y_shift;
-
- /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
- /* [DIRAC_STD] custom_dimensions_flag */
- if (get_bits1(gb)) {
- source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
- source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
- }
-
- /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
- * chroma_sampling_format(video_params) */
- /* [DIRAC_STD] custom_chroma_format_flag */
- if (get_bits1(gb))
- /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
- source->chroma_format = svq3_get_ue_golomb(gb);
- if (source->chroma_format > 2U) {
- av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
- source->chroma_format);
- return AVERROR_INVALIDDATA;
- }
-
- /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
- /* [DIRAC_STD] custom_scan_format_flag */
- if (get_bits1(gb))
- /* [DIRAC_STD] SOURCE_SAMPLING */
- source->interlaced = svq3_get_ue_golomb(gb);
- if (source->interlaced > 1U)
- return AVERROR_INVALIDDATA;
-
- /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
- if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
- source->frame_rate_index = svq3_get_ue_golomb(gb);
-
- if (source->frame_rate_index > 10U)
- return AVERROR_INVALIDDATA;
-
- if (!source->frame_rate_index) {
- /* [DIRAC_STD] FRAME_RATE_NUMER */
- frame_rate.num = svq3_get_ue_golomb(gb);
- /* [DIRAC_STD] FRAME_RATE_DENOM */
- frame_rate.den = svq3_get_ue_golomb(gb);
- }
- }
- /* [DIRAC_STD] preset_frame_rate(video_params, index) */
- if (source->frame_rate_index > 0) {
- if (source->frame_rate_index <= 8)
- frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
- else
- /* [DIRAC_STD] Table 10.3 values 9-10 */
- 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);
-
- /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
- * pixel_aspect_ratio(video_params) */
- if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
- /* [DIRAC_STD] index */
- source->aspect_ratio_index = svq3_get_ue_golomb(gb);
-
- if (source->aspect_ratio_index > 6U)
- return AVERROR_INVALIDDATA;
-
- 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);
- }
- }
- /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
- * aspect ratio values */
- if (source->aspect_ratio_index > 0)
- avctx->sample_aspect_ratio =
- dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
-
- /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
- if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
- /* [DIRAC_STD] CLEAN_WIDTH */
- source->clean_width = svq3_get_ue_golomb(gb);
- /* [DIRAC_STD] CLEAN_HEIGHT */
- source->clean_height = svq3_get_ue_golomb(gb);
- /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
- source->clean_left_offset = svq3_get_ue_golomb(gb);
- /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
- source->clean_right_offset = svq3_get_ue_golomb(gb);
- }
-
- /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
- * WARNING: Some adaptation seems to be done using the
- * AVCOL_RANGE_MPEG/JPEG values */
- if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
- /* [DIRAC_STD] index */
- source->pixel_range_index = svq3_get_ue_golomb(gb);
-
- if (source->pixel_range_index > 4U)
- return AVERROR_INVALIDDATA;
-
- /* 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;
- }
- }
- /* [DIRAC_STD] Table 10.5
- * Available signal range presets <--> pixel_range_presets */
- 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\n");
-
- avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
- avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift);
- if ((source->width % (1<<chroma_x_shift)) || (source->height % (1<<chroma_y_shift))) {
- av_log(avctx, AV_LOG_ERROR, "Dimensions must be a integer multiply of the chroma subsampling\n");
- return AVERROR_INVALIDDATA;
- }
-
-
- /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
- if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
- /* [DIRAC_STD] index */
- idx = source->color_spec_index = svq3_get_ue_golomb(gb);
-
- if (source->color_spec_index > 4U)
- return AVERROR_INVALIDDATA;
-
- 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) {
- /* [DIRAC_STD] 10.3.9.1 Colour primaries */
- if (get_bits1(gb)) {
- idx = svq3_get_ue_golomb(gb);
- if (idx < 3U)
- avctx->color_primaries = dirac_primaries[idx];
- }
- /* [DIRAC_STD] 10.3.9.2 Colour matrix */
- 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;
- }
- /* [DIRAC_STD] 10.3.9.3 Transfer function */
- 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;
-}
-
-/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
-int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
- dirac_source_params *source)
-{
- unsigned version_major;
- unsigned video_format, picture_coding_mode;
- int ret;
-
- /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
- version_major = svq3_get_ue_golomb(gb);
- svq3_get_ue_golomb(gb); /* version_minor */
- avctx->profile = svq3_get_ue_golomb(gb);
- avctx->level = svq3_get_ue_golomb(gb);
- /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
- * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
- 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 > 20U)
- return AVERROR_INVALIDDATA;
-
- /* Fill in defaults for the source parameters. */
- *source = dirac_source_parameters_defaults[video_format];
-
- /* [DIRAC_STD] 10.3 Source Parameters
- * Override the defaults. */
- if (ret = parse_source_parameters(avctx, gb, source))
- return ret;
-
- ret = ff_set_dimensions(avctx, source->width, source->height);
- if (ret < 0)
- return ret;
-
- /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
- * 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\n",
- picture_coding_mode);
- return AVERROR_INVALIDDATA;
- }
- return 0;
-}
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