virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-18 03:19:31 +02:00
Code Issues Releases Activity
df3cdf4c75
FFmpeg/libavcodec/dirac.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

411 lines
16 KiB
C
Raw Blame History

/*
* 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 "config.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "dirac.h"
#include "get_bits.h"
#include "golomb.h"
#include "mpeg12data.h"
#if CONFIG_DIRAC_PARSE
typedef struct dirac_source_params {
unsigned width;
unsigned height;
uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
uint8_t interlaced;
uint8_t top_field_first;
uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
uint16_t clean_width;
uint16_t clean_height;
uint16_t clean_left_offset;
uint16_t clean_right_offset;
uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
} dirac_source_params;
/* 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 */
static const enum AVPixelFormat dirac_pix_fmt[][3] = {
{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12},
{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12},
{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12},
};
/* [DIRAC_STD] 10.3 Parse Source Parameters.
* source_parameters(base_video_format) */
static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb,
void *log_ctx)
{
AVRational frame_rate = { 0, 0 };
unsigned luma_depth = 8, luma_offset = 16;
int idx;
int chroma_x_shift, chroma_y_shift;
int ret;
/* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
/* [DIRAC_STD] custom_dimensions_flag */
if (get_bits1(gb)) {
dsh->width = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
dsh->height = get_interleaved_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 */
dsh->chroma_format = get_interleaved_ue_golomb(gb);
if (dsh->chroma_format > 2U) {
if (log_ctx)
av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
dsh->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 */
dsh->interlaced = get_interleaved_ue_golomb(gb);
if (dsh->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 */
dsh->frame_rate_index = get_interleaved_ue_golomb(gb);
if (dsh->frame_rate_index > 10U)
return AVERROR_INVALIDDATA;
if (!dsh->frame_rate_index) {
/* [DIRAC_STD] FRAME_RATE_NUMER */
frame_rate.num = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] FRAME_RATE_DENOM */
frame_rate.den = get_interleaved_ue_golomb(gb);
}
}
/* [DIRAC_STD] preset_frame_rate(video_params, index) */
if (dsh->frame_rate_index > 0) {
if (dsh->frame_rate_index <= 8)
frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index];
else
/* [DIRAC_STD] Table 10.3 values 9-10 */
frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9];
}
dsh->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 */
dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb);
if (dsh->aspect_ratio_index > 6U)
return AVERROR_INVALIDDATA;
if (!dsh->aspect_ratio_index) {
dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb);
dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb);
}
}
/* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
* aspect ratio values */
if (dsh->aspect_ratio_index > 0)
dsh->sample_aspect_ratio =
dirac_preset_aspect_ratios[dsh->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 */
dsh->clean_width = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_HEIGHT */
dsh->clean_height = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_LEFT_OFFSET */
dsh->clean_left_offset = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
dsh->clean_right_offset = get_interleaved_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 */
dsh->pixel_range_index = get_interleaved_ue_golomb(gb);
if (dsh->pixel_range_index > 4U)
return AVERROR_INVALIDDATA;
/* This assumes either fullrange or MPEG levels only */
if (!dsh->pixel_range_index) {
luma_offset = get_interleaved_ue_golomb(gb);
luma_depth = av_log2(get_interleaved_ue_golomb(gb)) + 1;
get_interleaved_ue_golomb(gb); /* chroma offset */
get_interleaved_ue_golomb(gb); /* chroma excursion */
dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG
: AVCOL_RANGE_JPEG;
}
}
/* [DIRAC_STD] Table 10.5
* Available signal range presets <--> pixel_range_presets */
if (dsh->pixel_range_index > 0) {
idx = dsh->pixel_range_index - 1;
luma_depth = pixel_range_presets[idx].bitdepth;
dsh->color_range = pixel_range_presets[idx].color_range;
}
dsh->bit_depth = luma_depth;
/* Full range 8 bts uses the same pix_fmts as limited range 8 bits */
dsh->pixel_range_index += dsh->pixel_range_index == 1;
if (dsh->pixel_range_index < 2U)
return AVERROR_INVALIDDATA;
dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2];
ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift);
if (ret)
return ret;
if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) {
if (log_ctx)
av_log(log_ctx, 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 = dsh->color_spec_index = get_interleaved_ue_golomb(gb);
if (dsh->color_spec_index > 4U)
return AVERROR_INVALIDDATA;
dsh->color_primaries = dirac_color_presets[idx].color_primaries;
dsh->colorspace = dirac_color_presets[idx].colorspace;
dsh->color_trc = dirac_color_presets[idx].color_trc;
if (!dsh->color_spec_index) {
/* [DIRAC_STD] 10.3.9.1 Colour primaries */
if (get_bits1(gb)) {
idx = get_interleaved_ue_golomb(gb);
if (idx < 3U)
dsh->color_primaries = dirac_primaries[idx];
}
/* [DIRAC_STD] 10.3.9.2 Colour matrix */
if (get_bits1(gb)) {
idx = get_interleaved_ue_golomb(gb);
if (!idx)
dsh->colorspace = AVCOL_SPC_BT709;
else if (idx == 1)
dsh->colorspace = AVCOL_SPC_BT470BG;
}
/* [DIRAC_STD] 10.3.9.3 Transfer function */
if (get_bits1(gb) && !get_interleaved_ue_golomb(gb))
dsh->color_trc = AVCOL_TRC_BT709;
}
} else {
idx = dsh->color_spec_index;
dsh->color_primaries = dirac_color_presets[idx].color_primaries;
dsh->colorspace = dirac_color_presets[idx].colorspace;
dsh->color_trc = dirac_color_presets[idx].color_trc;
}
return 0;
}
/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
const uint8_t *buf, size_t buf_size,
void *log_ctx)
{
AVDiracSeqHeader *dsh;
GetBitContext gb;
unsigned video_format, picture_coding_mode;
int ret;
dsh = av_mallocz(sizeof(*dsh));
if (!dsh)
return AVERROR(ENOMEM);
ret = init_get_bits8(&gb, buf, buf_size);
if (ret < 0)
goto fail;
/* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
dsh->version.major = get_interleaved_ue_golomb(&gb);
dsh->version.minor = get_interleaved_ue_golomb(&gb);
dsh->profile = get_interleaved_ue_golomb(&gb);
dsh->level = get_interleaved_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 = get_interleaved_ue_golomb(&gb);
if (dsh->version.major < 2 && log_ctx)
av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n");
else if (dsh->version.major > 2 && log_ctx)
av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
if (video_format > 20U) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
/* Fill in defaults for the source parameters. */
dsh->width = dirac_source_parameters_defaults[video_format].width;
dsh->height = dirac_source_parameters_defaults[video_format].height;
dsh->chroma_format = dirac_source_parameters_defaults[video_format].chroma_format;
dsh->interlaced = dirac_source_parameters_defaults[video_format].interlaced;
dsh->top_field_first = dirac_source_parameters_defaults[video_format].top_field_first;
dsh->frame_rate_index = dirac_source_parameters_defaults[video_format].frame_rate_index;
dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index;
dsh->clean_width = dirac_source_parameters_defaults[video_format].clean_width;
dsh->clean_height = dirac_source_parameters_defaults[video_format].clean_height;
dsh->clean_left_offset = dirac_source_parameters_defaults[video_format].clean_left_offset;
dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset;
dsh->pixel_range_index = dirac_source_parameters_defaults[video_format].pixel_range_index;
dsh->color_spec_index = dirac_source_parameters_defaults[video_format].color_spec_index;
/* [DIRAC_STD] 10.3 Source Parameters
* Override the defaults. */
ret = parse_source_parameters(dsh, &gb, log_ctx);
if (ret < 0)
goto fail;
/* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
* currently only used to signal field coding */
picture_coding_mode = get_interleaved_ue_golomb(&gb);
if (picture_coding_mode != 0) {
if (log_ctx) {
av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
picture_coding_mode);
}
ret = AVERROR_INVALIDDATA;
goto fail;
}
*pdsh = dsh;
return 0;
fail:
av_freep(&dsh);
*pdsh = NULL;
return ret;
}
#else
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
const uint8_t *buf, size_t buf_size,
void *log_ctx)
{
return AVERROR(ENOSYS);
}
#endif
Reference in New Issue View Git Blame Copy Permalink