[deb_ffmpeg.git] / ffmpeg / libavcodec / dirac.c

/*
 * 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 "avcodec.h"
#include "dirac.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];
    }
    avctx->framerate = frame_rate;

    /* [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 an integer multiple 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;

    ff_set_sar(avctx, avctx->sample_aspect_ratio);

    /* [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;
}
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (C) 2007 Marco Gerards <marco@gnu.org>
	3	* Copyright (C) 2009 David Conrad
	4	* Copyright (C) 2011 Jordi Ortiz
	5	*
	6	* This file is part of FFmpeg.
	7	*
	8	* FFmpeg is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2.1 of the License, or (at your option) any later version.
	12	*
	13	* FFmpeg is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with FFmpeg; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	/**
	24	* @file
	25	* Dirac Decoder
	26	* @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
	27	*/
	28
	29	#include "libavutil/imgutils.h"
	30
	31	#include "avcodec.h"
	32	#include "dirac.h"
	33	#include "golomb.h"
	34	#include "internal.h"
	35	#include "mpeg12data.h"
	36
	37	/* defaults for source parameters */
	38	static const dirac_source_params dirac_source_parameters_defaults[] = {
	39	{ 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
	40	{ 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
	41	{ 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
	42	{ 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
	43	{ 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
	44	{ 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
	45	{ 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
	46	{ 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
	47	{ 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
	48
	49	{ 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
	50	{ 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
	51	{ 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
	52	{ 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
	53	{ 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
	54	{ 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
	55	{ 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
	56	{ 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
	57
	58	{ 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
	59	{ 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
	60	{ 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
	61	{ 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
	62	};
	63
	64	/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
65	static const AVRational dirac_preset_aspect_ratios[] = {
66	{ 1, 1 },
67	{ 10, 11 },
68	{ 12, 11 },
69	{ 40, 33 },
70	{ 16, 11 },
71	{ 4, 3 },
72	};
73
74	/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
75	* Table 10.3 Available preset frame rate values
76	*/
77	static const AVRational dirac_frame_rate[] = {
78	{ 15000, 1001 },
79	{ 25, 2 },
80	};
81
82	/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
83	* range presets */
84	static const struct {
85	uint8_t bitdepth;
86	enum AVColorRange color_range;
87	} pixel_range_presets[] = {
88	{ 8, AVCOL_RANGE_JPEG },
89	{ 8, AVCOL_RANGE_MPEG },
90	{ 10, AVCOL_RANGE_MPEG },
91	{ 12, AVCOL_RANGE_MPEG },
92	};
93
94	static const enum AVColorPrimaries dirac_primaries[] = {
95	AVCOL_PRI_BT709,
96	AVCOL_PRI_SMPTE170M,
97	AVCOL_PRI_BT470BG,
98	};
99
100	static const struct {
101	enum AVColorPrimaries color_primaries;
102	enum AVColorSpace colorspace;
103	enum AVColorTransferCharacteristic color_trc;
104	} dirac_color_presets[] = {
105	{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
106	{ AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
107	{ AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
108	{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
109	{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
110	};
111
112	/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
113	static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
114	{ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
115	{ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P },
116	};
117
118	/* [DIRAC_STD] 10.3 Parse Source Parameters.
119	* source_parameters(base_video_format) */
120	static int parse_source_parameters(AVCodecContext avctx, GetBitContext gb,
121	dirac_source_params *source)
122	{
123	AVRational frame_rate = { 0, 0 };
124	unsigned luma_depth = 8, luma_offset = 16;
125	int idx;
126	int chroma_x_shift, chroma_y_shift;
127
128	/* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
129	/* [DIRAC_STD] custom_dimensions_flag */
130	if (get_bits1(gb)) {
131	source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
132	source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
133	}
134
135	/* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
136	* chroma_sampling_format(video_params) */
137	/* [DIRAC_STD] custom_chroma_format_flag */
138	if (get_bits1(gb))
139	/* [DIRAC_STD] CHROMA_FORMAT_INDEX */
140	source->chroma_format = svq3_get_ue_golomb(gb);
141	if (source->chroma_format > 2U) {
142	av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
143	source->chroma_format);
144	return AVERROR_INVALIDDATA;
145	}
146
147	/* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
148	/* [DIRAC_STD] custom_scan_format_flag */
149	if (get_bits1(gb))
150	/* [DIRAC_STD] SOURCE_SAMPLING */
151	source->interlaced = svq3_get_ue_golomb(gb);
152	if (source->interlaced > 1U)
153	return AVERROR_INVALIDDATA;
154
155	/* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
156	if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
157	source->frame_rate_index = svq3_get_ue_golomb(gb);
158
159	if (source->frame_rate_index > 10U)
160	return AVERROR_INVALIDDATA;
161
162	if (!source->frame_rate_index) {
163	/* [DIRAC_STD] FRAME_RATE_NUMER */
164	frame_rate.num = svq3_get_ue_golomb(gb);
165	/* [DIRAC_STD] FRAME_RATE_DENOM */
166	frame_rate.den = svq3_get_ue_golomb(gb);
167	}
168	}
169	/* [DIRAC_STD] preset_frame_rate(video_params, index) */
170	if (source->frame_rate_index > 0) {
171	if (source->frame_rate_index <= 8)
172	frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
173	else
174	/* [DIRAC_STD] Table 10.3 values 9-10 */
175	frame_rate = dirac_frame_rate[source->frame_rate_index - 9];
176	}
f6fa7814	177	avctx->framerate = frame_rate;
2ba45a60 DM	178
	179	/* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
	180	* pixel_aspect_ratio(video_params) */
	181	if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
	182	/* [DIRAC_STD] index */
	183	source->aspect_ratio_index = svq3_get_ue_golomb(gb);
	184
	185	if (source->aspect_ratio_index > 6U)
	186	return AVERROR_INVALIDDATA;
	187
	188	if (!source->aspect_ratio_index) {
	189	avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb);
	190	avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb);
	191	}
	192	}
	193	/* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
	194	* aspect ratio values */
	195	if (source->aspect_ratio_index > 0)
	196	avctx->sample_aspect_ratio =
	197	dirac_preset_aspect_ratios[source->aspect_ratio_index - 1];
	198
	199	/* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
	200	if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
	201	/* [DIRAC_STD] CLEAN_WIDTH */
	202	source->clean_width = svq3_get_ue_golomb(gb);
	203	/* [DIRAC_STD] CLEAN_HEIGHT */
	204	source->clean_height = svq3_get_ue_golomb(gb);
	205	/* [DIRAC_STD] CLEAN_LEFT_OFFSET */
	206	source->clean_left_offset = svq3_get_ue_golomb(gb);
	207	/* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
	208	source->clean_right_offset = svq3_get_ue_golomb(gb);
	209	}
	210
	211	/* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
	212	* WARNING: Some adaptation seems to be done using the
	213	* AVCOL_RANGE_MPEG/JPEG values */
	214	if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
	215	/* [DIRAC_STD] index */
	216	source->pixel_range_index = svq3_get_ue_golomb(gb);
	217
	218	if (source->pixel_range_index > 4U)
	219	return AVERROR_INVALIDDATA;
	220
	221	/* This assumes either fullrange or MPEG levels only */
	222	if (!source->pixel_range_index) {
	223	luma_offset = svq3_get_ue_golomb(gb);
	224	luma_depth = av_log2(svq3_get_ue_golomb(gb)) + 1;
	225	svq3_get_ue_golomb(gb); /* chroma offset */
	226	svq3_get_ue_golomb(gb); /* chroma excursion */
	227	avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG
	228	: AVCOL_RANGE_JPEG;
	229	}
	230	}
	231	/* [DIRAC_STD] Table 10.5
	232	* Available signal range presets <--> pixel_range_presets */
	233	if (source->pixel_range_index > 0) {
	234	idx = source->pixel_range_index - 1;
	235	luma_depth = pixel_range_presets[idx].bitdepth;
	236	avctx->color_range = pixel_range_presets[idx].color_range;
	237	}
	238
	239	if (luma_depth > 8)
	240	av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n");
	241
242	avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
243	avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift);
244	if ((source->width % (1<<chroma_x_shift)) \|\| (source->height % (1<<chroma_y_shift))) {
245	av_log(avctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n");
246	return AVERROR_INVALIDDATA;
247	}
248
249
250	/* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
251	if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
252	/* [DIRAC_STD] index */
253	idx = source->color_spec_index = svq3_get_ue_golomb(gb);
254
255	if (source->color_spec_index > 4U)
256	return AVERROR_INVALIDDATA;
257
258	avctx->color_primaries = dirac_color_presets[idx].color_primaries;
259	avctx->colorspace = dirac_color_presets[idx].colorspace;
260	avctx->color_trc = dirac_color_presets[idx].color_trc;
261
262	if (!source->color_spec_index) {
263	/* [DIRAC_STD] 10.3.9.1 Colour primaries */
264	if (get_bits1(gb)) {
265	idx = svq3_get_ue_golomb(gb);
266	if (idx < 3U)
267	avctx->color_primaries = dirac_primaries[idx];
268	}
269	/* [DIRAC_STD] 10.3.9.2 Colour matrix */
270	if (get_bits1(gb)) {
271	idx = svq3_get_ue_golomb(gb);
272	if (!idx)
273	avctx->colorspace = AVCOL_SPC_BT709;
274	else if (idx == 1)
275	avctx->colorspace = AVCOL_SPC_BT470BG;
276	}
277	/* [DIRAC_STD] 10.3.9.3 Transfer function */
278	if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
279	avctx->color_trc = AVCOL_TRC_BT709;
280	}
281	} else {
282	idx = source->color_spec_index;
283	avctx->color_primaries = dirac_color_presets[idx].color_primaries;
284	avctx->colorspace = dirac_color_presets[idx].colorspace;
285	avctx->color_trc = dirac_color_presets[idx].color_trc;
286	}
287
288	return 0;
289	}
290
291	/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
292	int avpriv_dirac_parse_sequence_header(AVCodecContext avctx, GetBitContext gb,
293	dirac_source_params *source)
294	{
295	unsigned version_major;
296	unsigned video_format, picture_coding_mode;
297	int ret;
298
299	/* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
300	version_major = svq3_get_ue_golomb(gb);
301	svq3_get_ue_golomb(gb); /* version_minor */
302	avctx->profile = svq3_get_ue_golomb(gb);
303	avctx->level = svq3_get_ue_golomb(gb);
304	/* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
305	* 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
306	video_format = svq3_get_ue_golomb(gb);
307
308	if (version_major < 2)
309	av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
310	else if (version_major > 2)
311	av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
312
313	if (video_format > 20U)
314	return AVERROR_INVALIDDATA;
315
316	/* Fill in defaults for the source parameters. */
317	*source = dirac_source_parameters_defaults[video_format];
318
319	/* [DIRAC_STD] 10.3 Source Parameters
320	* Override the defaults. */
321	if (ret = parse_source_parameters(avctx, gb, source))
322	return ret;
323
324	ret = ff_set_dimensions(avctx, source->width, source->height);
325	if (ret < 0)
326	return ret;
327
328	ff_set_sar(avctx, avctx->sample_aspect_ratio);
329
330	/* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
331	* currently only used to signal field coding */
332	picture_coding_mode = svq3_get_ue_golomb(gb);
333	if (picture_coding_mode != 0) {
334	av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n",
335	picture_coding_mode);
336	return AVERROR_INVALIDDATA;
337	}
338	return 0;
339	}