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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/hapdec.c	Lines:	217	262	82.8 %
Date:	2020-01-28 04:56:05	Branches:	89	133	66.9 %


/*
 * Vidvox Hap decoder
 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
 * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
 *
 * HapQA and HAPAlphaOnly added by Jokyo Images
 *
 * 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
 * Hap decoder
 *
 * Fourcc: Hap1, Hap5, HapY, HapA, HapM
 *
 * https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
 */

#include <stdint.h>

#include "libavutil/imgutils.h"

#include "avcodec.h"
#include "bytestream.h"
#include "hap.h"
#include "internal.h"
#include "snappy.h"
#include "texturedsp.h"
#include "thread.h"

static int hap_parse_decode_instructions(HapContext *ctx, int size)
{
    GetByteContext *gbc = &ctx->gbc;
    int section_size;
    enum HapSectionType section_type;
    int is_first_table = 1, had_offsets = 0, had_compressors = 0, had_sizes = 0;
    int i, ret;

    while (size > 0) {
        int stream_remaining = bytestream2_get_bytes_left(gbc);
        ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
        if (ret != 0)
            return ret;

        size -= stream_remaining - bytestream2_get_bytes_left(gbc);

        switch (section_type) {
            case HAP_ST_COMPRESSOR_TABLE:
                ret = ff_hap_set_chunk_count(ctx, section_size, is_first_table);
                if (ret != 0)
                    return ret;
                for (i = 0; i < section_size; i++) {
                    ctx->chunks[i].compressor = bytestream2_get_byte(gbc) << 4;
                }
                had_compressors = 1;
                is_first_table = 0;
                break;
            case HAP_ST_SIZE_TABLE:
                ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
                if (ret != 0)
                    return ret;
                for (i = 0; i < section_size / 4; i++) {
                    ctx->chunks[i].compressed_size = bytestream2_get_le32(gbc);
                }
                had_sizes = 1;
                is_first_table = 0;
                break;
            case HAP_ST_OFFSET_TABLE:
                ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
                if (ret != 0)
                    return ret;
                for (i = 0; i < section_size / 4; i++) {
                    ctx->chunks[i].compressed_offset = bytestream2_get_le32(gbc);
                }
                had_offsets = 1;
                is_first_table = 0;
                break;
            default:
                break;
        }
        size -= section_size;
    }

    if (!had_sizes || !had_compressors)
        return AVERROR_INVALIDDATA;

    /* The offsets table is optional. If not present than calculate offsets by
     * summing the sizes of preceding chunks. */
    if (!had_offsets) {
        size_t running_size = 0;
        for (i = 0; i < ctx->chunk_count; i++) {
            ctx->chunks[i].compressed_offset = running_size;
            running_size += ctx->chunks[i].compressed_size;
        }
    }

    return 0;
}

static int hap_can_use_tex_in_place(HapContext *ctx)
{
    int i;
    size_t running_offset = 0;
    for (i = 0; i < ctx->chunk_count; i++) {
        if (ctx->chunks[i].compressed_offset != running_offset
            || ctx->chunks[i].compressor != HAP_COMP_NONE)
            return 0;
        running_offset += ctx->chunks[i].compressed_size;
    }
    return 1;
}

static int hap_parse_frame_header(AVCodecContext *avctx)
{
    HapContext *ctx = avctx->priv_data;
    GetByteContext *gbc = &ctx->gbc;
    int section_size;
    enum HapSectionType section_type;
    const char *compressorstr;
    int i, ret;

    ret = ff_hap_parse_section_header(gbc, &ctx->texture_section_size, &section_type);
    if (ret != 0)
        return ret;

    if ((avctx->codec_tag == MKTAG('H','a','p','1') && (section_type & 0x0F) != HAP_FMT_RGBDXT1) ||
        (avctx->codec_tag == MKTAG('H','a','p','5') && (section_type & 0x0F) != HAP_FMT_RGBADXT5) ||
        (avctx->codec_tag == MKTAG('H','a','p','Y') && (section_type & 0x0F) != HAP_FMT_YCOCGDXT5) ||
        (avctx->codec_tag == MKTAG('H','a','p','A') && (section_type & 0x0F) != HAP_FMT_RGTC1) ||
        ((avctx->codec_tag == MKTAG('H','a','p','M') && (section_type & 0x0F) != HAP_FMT_RGTC1) &&
                                                        (section_type & 0x0F) != HAP_FMT_YCOCGDXT5)) {
        av_log(avctx, AV_LOG_ERROR,
               "Invalid texture format %#04x.\n", section_type & 0x0F);
        return AVERROR_INVALIDDATA;
    }

    switch (section_type & 0xF0) {
        case HAP_COMP_NONE:
        case HAP_COMP_SNAPPY:
            ret = ff_hap_set_chunk_count(ctx, 1, 1);
            if (ret == 0) {
                ctx->chunks[0].compressor = section_type & 0xF0;
                ctx->chunks[0].compressed_offset = 0;
                ctx->chunks[0].compressed_size = ctx->texture_section_size;
            }
            if (ctx->chunks[0].compressor == HAP_COMP_NONE) {
                compressorstr = "none";
            } else {
                compressorstr = "snappy";
            }
            break;
        case HAP_COMP_COMPLEX:
            ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
            if (ret == 0 && section_type != HAP_ST_DECODE_INSTRUCTIONS)
                ret = AVERROR_INVALIDDATA;
            if (ret == 0)
                ret = hap_parse_decode_instructions(ctx, section_size);
            compressorstr = "complex";
            break;
        default:
            ret = AVERROR_INVALIDDATA;
            break;
    }

    if (ret != 0)
        return ret;

    /* Check the frame is valid and read the uncompressed chunk sizes */
    ctx->tex_size = 0;
    for (i = 0; i < ctx->chunk_count; i++) {
        HapChunk *chunk = &ctx->chunks[i];

        /* Check the compressed buffer is valid */
        if (chunk->compressed_offset + chunk->compressed_size > bytestream2_get_bytes_left(gbc))
            return AVERROR_INVALIDDATA;

        /* Chunks are unpacked sequentially, ctx->tex_size is the uncompressed
         * size thus far */
        chunk->uncompressed_offset = ctx->tex_size;

        /* Fill out uncompressed size */
        if (chunk->compressor == HAP_COMP_SNAPPY) {
            GetByteContext gbc_tmp;
            int64_t uncompressed_size;
            bytestream2_init(&gbc_tmp, gbc->buffer + chunk->compressed_offset,
                             chunk->compressed_size);
            uncompressed_size = ff_snappy_peek_uncompressed_length(&gbc_tmp);
            if (uncompressed_size < 0) {
                return uncompressed_size;
            }
            chunk->uncompressed_size = uncompressed_size;
        } else if (chunk->compressor == HAP_COMP_NONE) {
            chunk->uncompressed_size = chunk->compressed_size;
        } else {
            return AVERROR_INVALIDDATA;
        }
        ctx->tex_size += chunk->uncompressed_size;
    }

    av_log(avctx, AV_LOG_DEBUG, "%s compressor\n", compressorstr);

    return ret;
}

static int decompress_chunks_thread(AVCodecContext *avctx, void *arg,
                                    int chunk_nb, int thread_nb)
{
    HapContext *ctx = avctx->priv_data;

    HapChunk *chunk = &ctx->chunks[chunk_nb];
    GetByteContext gbc;
    uint8_t *dst = ctx->tex_buf + chunk->uncompressed_offset;

    bytestream2_init(&gbc, ctx->gbc.buffer + chunk->compressed_offset, chunk->compressed_size);

    if (chunk->compressor == HAP_COMP_SNAPPY) {
        int ret;
        int64_t uncompressed_size = ctx->tex_size;

        /* Uncompress the frame */
        ret = ff_snappy_uncompress(&gbc, dst, &uncompressed_size);
        if (ret < 0) {
             av_log(avctx, AV_LOG_ERROR, "Snappy uncompress error\n");
             return ret;
        }
    } else if (chunk->compressor == HAP_COMP_NONE) {
        bytestream2_get_buffer(&gbc, dst, chunk->compressed_size);
    }

    return 0;
}

static int decompress_texture_thread_internal(AVCodecContext *avctx, void *arg,
                                              int slice, int thread_nb, int texture_num)
{
    HapContext *ctx = avctx->priv_data;
    AVFrame *frame = arg;
    const uint8_t *d = ctx->tex_data;
    int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
    int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
    int x, y;
    int start_slice, end_slice;
    int base_blocks_per_slice = h_block / ctx->slice_count;
    int remainder_blocks = h_block % ctx->slice_count;

    /* When the frame height (in blocks) doesn't divide evenly between the
     * number of slices, spread the remaining blocks evenly between the first
     * operations */
    start_slice = slice * base_blocks_per_slice;
    /* Add any extra blocks (one per slice) that have been added before this slice */
    start_slice += FFMIN(slice, remainder_blocks);

    end_slice = start_slice + base_blocks_per_slice;
    /* Add an extra block if there are still remainder blocks to be accounted for */
    if (slice < remainder_blocks)
        end_slice++;

    for (y = start_slice; y < end_slice; y++) {
        uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
        int off  = y * w_block;
        for (x = 0; x < w_block; x++) {
            if (texture_num == 0) {
                ctx->tex_fun(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
                             d + (off + x) * ctx->tex_rat);
            } else {
                ctx->tex_fun2(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
                              d + (off + x) * ctx->tex_rat2);
            }
        }
    }

    return 0;
}

static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
                                     int slice, int thread_nb)
{
    return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 0);
}

static int decompress_texture2_thread(AVCodecContext *avctx, void *arg,
                                      int slice, int thread_nb)
{
    return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 1);
}

static int hap_decode(AVCodecContext *avctx, void *data,
                      int *got_frame, AVPacket *avpkt)
{
    HapContext *ctx = avctx->priv_data;
    ThreadFrame tframe;
    int ret, i, t;
    int tex_size;
    int section_size;
    enum HapSectionType section_type;
    int start_texture_section = 0;
    int tex_rat[2] = {0, 0};

    bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);

    tex_rat[0] = ctx->tex_rat;

    /* check for multi texture header */
    if (ctx->texture_count == 2) {
        ret = ff_hap_parse_section_header(&ctx->gbc, &section_size, &section_type);
        if (ret != 0)
            return ret;
        if ((section_type & 0x0F) != 0x0D) {
            av_log(avctx, AV_LOG_ERROR, "Invalid section type in 2 textures mode %#04x.\n", section_type);
            return AVERROR_INVALIDDATA;
        }
        start_texture_section = 4;
        tex_rat[1] = ctx->tex_rat2;
    }

    /* Get the output frame ready to receive data */
    tframe.f = data;
    ret = ff_thread_get_buffer(avctx, &tframe, 0);
    if (ret < 0)
        return ret;

    for (t = 0; t < ctx->texture_count; t++) {
        bytestream2_seek(&ctx->gbc, start_texture_section, SEEK_SET);

        /* Check for section header */
        ret = hap_parse_frame_header(avctx);
        if (ret < 0)
            return ret;

        start_texture_section += ctx->texture_section_size + 4;

        if (avctx->codec->update_thread_context)
            ff_thread_finish_setup(avctx);

        /* Unpack the DXT texture */
        if (hap_can_use_tex_in_place(ctx)) {
            /* Only DXTC texture compression in a contiguous block */
            ctx->tex_data = ctx->gbc.buffer;
            tex_size = FFMIN(ctx->texture_section_size, bytestream2_get_bytes_left(&ctx->gbc));
        } else {
            /* Perform the second-stage decompression */
            ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
            if (ret < 0)
                return ret;

            avctx->execute2(avctx, decompress_chunks_thread, NULL,
                            ctx->chunk_results, ctx->chunk_count);

            for (i = 0; i < ctx->chunk_count; i++) {
                if (ctx->chunk_results[i] < 0)
                    return ctx->chunk_results[i];
            }

            ctx->tex_data = ctx->tex_buf;
            tex_size = ctx->tex_size;
        }

        if (tex_size < (avctx->coded_width  / TEXTURE_BLOCK_W)
            *(avctx->coded_height / TEXTURE_BLOCK_H)
            *tex_rat[t]) {
            av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
            return AVERROR_INVALIDDATA;
        }

        /* Use the decompress function on the texture, one block per thread */
        if (t == 0){
            avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
        } else{
            tframe.f = data;
            avctx->execute2(avctx, decompress_texture2_thread, tframe.f, NULL, ctx->slice_count);
        }
    }

    /* Frame is ready to be output */
    tframe.f->pict_type = AV_PICTURE_TYPE_I;
    tframe.f->key_frame = 1;
    *got_frame = 1;

    return avpkt->size;
}

static av_cold int hap_init(AVCodecContext *avctx)
{
    HapContext *ctx = avctx->priv_data;
    const char *texture_name;
    int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);

    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Invalid video size %dx%d.\n",
               avctx->width, avctx->height);
        return ret;
    }

    /* Since codec is based on 4x4 blocks, size is aligned to 4 */
    avctx->coded_width  = FFALIGN(avctx->width,  TEXTURE_BLOCK_W);
    avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);

    ff_texturedsp_init(&ctx->dxtc);

    ctx->texture_count  = 1;
    ctx->uncompress_pix_size = 4;

    switch (avctx->codec_tag) {
    case MKTAG('H','a','p','1'):
        texture_name = "DXT1";
        ctx->tex_rat = 8;
        ctx->tex_fun = ctx->dxtc.dxt1_block;
        avctx->pix_fmt = AV_PIX_FMT_RGB0;
        break;
    case MKTAG('H','a','p','5'):
        texture_name = "DXT5";
        ctx->tex_rat = 16;
        ctx->tex_fun = ctx->dxtc.dxt5_block;
        avctx->pix_fmt = AV_PIX_FMT_RGBA;
        break;
    case MKTAG('H','a','p','Y'):
        texture_name = "DXT5-YCoCg-scaled";
        ctx->tex_rat = 16;
        ctx->tex_fun = ctx->dxtc.dxt5ys_block;
        avctx->pix_fmt = AV_PIX_FMT_RGB0;
        break;
    case MKTAG('H','a','p','A'):
        texture_name = "RGTC1";
        ctx->tex_rat = 8;
        ctx->tex_fun = ctx->dxtc.rgtc1u_gray_block;
        avctx->pix_fmt = AV_PIX_FMT_GRAY8;
        ctx->uncompress_pix_size = 1;
        break;
    case MKTAG('H','a','p','M'):
        texture_name  = "DXT5-YCoCg-scaled / RGTC1";
        ctx->tex_rat  = 16;
        ctx->tex_rat2 = 8;
        ctx->tex_fun  = ctx->dxtc.dxt5ys_block;
        ctx->tex_fun2 = ctx->dxtc.rgtc1u_alpha_block;
        avctx->pix_fmt = AV_PIX_FMT_RGBA;
        ctx->texture_count = 2;
        break;
    default:
        return AVERROR_DECODER_NOT_FOUND;
    }

    av_log(avctx, AV_LOG_DEBUG, "%s texture\n", texture_name);

    ctx->slice_count = av_clip(avctx->thread_count, 1,
                               avctx->coded_height / TEXTURE_BLOCK_H);

    return 0;
}

static av_cold int hap_close(AVCodecContext *avctx)
{
    HapContext *ctx = avctx->priv_data;

    ff_hap_free_context(ctx);

    return 0;
}

AVCodec ff_hap_decoder = {
    .name           = "hap",
    .long_name      = NULL_IF_CONFIG_SMALL("Vidvox Hap"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_HAP,
    .init           = hap_init,
    .decode         = hap_decode,
    .close          = hap_close,
    .priv_data_size = sizeof(HapContext),
    .capabilities   = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS |
                      AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
                      FF_CODEC_CAP_INIT_CLEANUP,
    .codec_tags     = (const uint32_t []){
        MKTAG('H','a','p','1'),
        MKTAG('H','a','p','5'),
        MKTAG('H','a','p','Y'),
        MKTAG('H','a','p','A'),
        MKTAG('H','a','p','M'),
        FF_CODEC_TAGS_END,
    },
};


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* Vidvox Hap decoder
3			* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
4			* Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
5			*
6			* HapQA and HAPAlphaOnly added by Jokyo Images
7			*
8			* This file is part of FFmpeg.
9			*
10			* FFmpeg is free software; you can redistribute it and/or
11			* modify it under the terms of the GNU Lesser General Public
12			* License as published by the Free Software Foundation; either
13			* version 2.1 of the License, or (at your option) any later version.
14			*
15			* FFmpeg is distributed in the hope that it will be useful,
16			* but WITHOUT ANY WARRANTY; without even the implied warranty of
17			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18			* Lesser General Public License for more details.
19			*
20			* You should have received a copy of the GNU Lesser General Public
21			* License along with FFmpeg; if not, write to the Free Software
22			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23			*/
24
25			/**
26			* @file
27			* Hap decoder
28			*
29			* Fourcc: Hap1, Hap5, HapY, HapA, HapM
30			*
31			* https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
32			*/
33
34			#include <stdint.h>
35
36			#include "libavutil/imgutils.h"
37
38			#include "avcodec.h"
39			#include "bytestream.h"
40			#include "hap.h"
41			#include "internal.h"
42			#include "snappy.h"
43			#include "texturedsp.h"
44			#include "thread.h"
45
46		6	static int hap_parse_decode_instructions(HapContext *ctx, int size)
47			{
48		6	GetByteContext *gbc = &ctx->gbc;
49			int section_size;
50			enum HapSectionType section_type;
51		6	int is_first_table = 1, had_offsets = 0, had_compressors = 0, had_sizes = 0;
52			int i, ret;
53
54	✓✓	18	while (size > 0) {
55		12	int stream_remaining = bytestream2_get_bytes_left(gbc);
56		12	ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
57	✗✓	12	if (ret != 0)
58			return ret;
59
60		12	size -= stream_remaining - bytestream2_get_bytes_left(gbc);
61
62	✓✓✗✗	12	switch (section_type) {
63		6	case HAP_ST_COMPRESSOR_TABLE:
64		6	ret = ff_hap_set_chunk_count(ctx, section_size, is_first_table);
65	✗✓	6	if (ret != 0)
66			return ret;
67	✓✓	53	for (i = 0; i < section_size; i++) {
68		47	ctx->chunks[i].compressor = bytestream2_get_byte(gbc) << 4;
69			}
70		6	had_compressors = 1;
71		6	is_first_table = 0;
72		6	break;
73		6	case HAP_ST_SIZE_TABLE:
74		6	ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
75	✗✓	6	if (ret != 0)
76			return ret;
77	✓✓	53	for (i = 0; i < section_size / 4; i++) {
78		47	ctx->chunks[i].compressed_size = bytestream2_get_le32(gbc);
79			}
80		6	had_sizes = 1;
81		6	is_first_table = 0;
82		6	break;
83			case HAP_ST_OFFSET_TABLE:
84			ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
85			if (ret != 0)
86			return ret;
87			for (i = 0; i < section_size / 4; i++) {
88			ctx->chunks[i].compressed_offset = bytestream2_get_le32(gbc);
89			}
90			had_offsets = 1;
91			is_first_table = 0;
92			break;
93			default:
94			break;
95			}
96		12	size -= section_size;
97			}
98
99	✓✗✗✓	6	if (!had_sizes \|\| !had_compressors)
100			return AVERROR_INVALIDDATA;
101
102			/* The offsets table is optional. If not present than calculate offsets by
103			* summing the sizes of preceding chunks. */
104	✓✗	6	if (!had_offsets) {
105		6	size_t running_size = 0;
106	✓✓	53	for (i = 0; i < ctx->chunk_count; i++) {
107		47	ctx->chunks[i].compressed_offset = running_size;
108		47	running_size += ctx->chunks[i].compressed_size;
109			}
110			}
111
112		6	return 0;
113			}
114
115		12	static int hap_can_use_tex_in_place(HapContext *ctx)
116			{
117			int i;
118		12	size_t running_offset = 0;
119	✓✓	15	for (i = 0; i < ctx->chunk_count; i++) {
120	✓✗	12	if (ctx->chunks[i].compressed_offset != running_offset
121	✓✓	12	\|\| ctx->chunks[i].compressor != HAP_COMP_NONE)
122		9	return 0;
123		3	running_offset += ctx->chunks[i].compressed_size;
124			}
125		3	return 1;
126			}
127
128		12	static int hap_parse_frame_header(AVCodecContext *avctx)
129			{
130		12	HapContext *ctx = avctx->priv_data;
131		12	GetByteContext *gbc = &ctx->gbc;
132			int section_size;
133			enum HapSectionType section_type;
134			const char *compressorstr;
135			int i, ret;
136
137		12	ret = ff_hap_parse_section_header(gbc, &ctx->texture_section_size, &section_type);
138	✗✓	12	if (ret != 0)
139			return ret;
140
141	✓✓✓✗	12	if ((avctx->codec_tag == MKTAG('H','a','p','1') && (section_type & 0x0F) != HAP_FMT_RGBDXT1) \|\|
142	✓✓✓✗	12	(avctx->codec_tag == MKTAG('H','a','p','5') && (section_type & 0x0F) != HAP_FMT_RGBADXT5) \|\|
143	✓✓✓✗	12	(avctx->codec_tag == MKTAG('H','a','p','Y') && (section_type & 0x0F) != HAP_FMT_YCOCGDXT5) \|\|
144	✓✓✓✗	12	(avctx->codec_tag == MKTAG('H','a','p','A') && (section_type & 0x0F) != HAP_FMT_RGTC1) \|\|
145	✓✓✓✓	12	((avctx->codec_tag == MKTAG('H','a','p','M') && (section_type & 0x0F) != HAP_FMT_RGTC1) &&
146	✗✓	3	(section_type & 0x0F) != HAP_FMT_YCOCGDXT5)) {
147			av_log(avctx, AV_LOG_ERROR,
148			"Invalid texture format %#04x.\n", section_type & 0x0F);
149			return AVERROR_INVALIDDATA;
150			}
151
152	✓✓✗	12	switch (section_type & 0xF0) {
153		6	case HAP_COMP_NONE:
154			case HAP_COMP_SNAPPY:
155		6	ret = ff_hap_set_chunk_count(ctx, 1, 1);
156	✓✗	6	if (ret == 0) {
157		6	ctx->chunks[0].compressor = section_type & 0xF0;
158		6	ctx->chunks[0].compressed_offset = 0;
159		6	ctx->chunks[0].compressed_size = ctx->texture_section_size;
160			}
161	✓✓	6	if (ctx->chunks[0].compressor == HAP_COMP_NONE) {
162		3	compressorstr = "none";
163			} else {
164		3	compressorstr = "snappy";
165			}
166		6	break;
167		6	case HAP_COMP_COMPLEX:
168		6	ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
169	✓✗✗✓	6	if (ret == 0 && section_type != HAP_ST_DECODE_INSTRUCTIONS)
170			ret = AVERROR_INVALIDDATA;
171	✓✗	6	if (ret == 0)
172		6	ret = hap_parse_decode_instructions(ctx, section_size);
173		6	compressorstr = "complex";
174		6	break;
175			default:
176			ret = AVERROR_INVALIDDATA;
177			break;
178			}
179
180	✗✓	12	if (ret != 0)
181			return ret;
182
183			/* Check the frame is valid and read the uncompressed chunk sizes */
184		12	ctx->tex_size = 0;
185	✓✓	65	for (i = 0; i < ctx->chunk_count; i++) {
186		53	HapChunk *chunk = &ctx->chunks[i];
187
188			/* Check the compressed buffer is valid */
189	✗✓	53	if (chunk->compressed_offset + chunk->compressed_size > bytestream2_get_bytes_left(gbc))
190			return AVERROR_INVALIDDATA;
191
192			/* Chunks are unpacked sequentially, ctx->tex_size is the uncompressed
193			* size thus far */
194		53	chunk->uncompressed_offset = ctx->tex_size;
195
196			/* Fill out uncompressed size */
197	✓✓	53	if (chunk->compressor == HAP_COMP_SNAPPY) {
198			GetByteContext gbc_tmp;
199			int64_t uncompressed_size;
200		50	bytestream2_init(&gbc_tmp, gbc->buffer + chunk->compressed_offset,
201		50	chunk->compressed_size);
202		50	uncompressed_size = ff_snappy_peek_uncompressed_length(&gbc_tmp);
203	✗✓	50	if (uncompressed_size < 0) {
204			return uncompressed_size;
205			}
206		50	chunk->uncompressed_size = uncompressed_size;
207	✓✗	3	} else if (chunk->compressor == HAP_COMP_NONE) {
208		3	chunk->uncompressed_size = chunk->compressed_size;
209			} else {
210			return AVERROR_INVALIDDATA;
211			}
212		53	ctx->tex_size += chunk->uncompressed_size;
213			}
214
215		12	av_log(avctx, AV_LOG_DEBUG, "%s compressor\n", compressorstr);
216
217		12	return ret;
218			}
219
220		50	static int decompress_chunks_thread(AVCodecContext avctx, void arg,
221			int chunk_nb, int thread_nb)
222			{
223		50	HapContext *ctx = avctx->priv_data;
224
225		50	HapChunk *chunk = &ctx->chunks[chunk_nb];
226			GetByteContext gbc;
227		50	uint8_t *dst = ctx->tex_buf + chunk->uncompressed_offset;
228
229		50	bytestream2_init(&gbc, ctx->gbc.buffer + chunk->compressed_offset, chunk->compressed_size);
230
231	✓✗	50	if (chunk->compressor == HAP_COMP_SNAPPY) {
232			int ret;
233		50	int64_t uncompressed_size = ctx->tex_size;
234
235			/* Uncompress the frame */
236		50	ret = ff_snappy_uncompress(&gbc, dst, &uncompressed_size);
237	✗✓	50	if (ret < 0) {
238			av_log(avctx, AV_LOG_ERROR, "Snappy uncompress error\n");
239			return ret;
240			}
241			} else if (chunk->compressor == HAP_COMP_NONE) {
242			bytestream2_get_buffer(&gbc, dst, chunk->compressed_size);
243			}
244
245		50	return 0;
246			}
247
248		12	static int decompress_texture_thread_internal(AVCodecContext avctx, void arg,
249			int slice, int thread_nb, int texture_num)
250			{
251		12	HapContext *ctx = avctx->priv_data;
252		12	AVFrame *frame = arg;
253		12	const uint8_t *d = ctx->tex_data;
254		12	int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
255		12	int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
256			int x, y;
257			int start_slice, end_slice;
258		12	int base_blocks_per_slice = h_block / ctx->slice_count;
259		12	int remainder_blocks = h_block % ctx->slice_count;
260
261			/* When the frame height (in blocks) doesn't divide evenly between the
262			* number of slices, spread the remaining blocks evenly between the first
263			* operations */
264		12	start_slice = slice * base_blocks_per_slice;
265			/* Add any extra blocks (one per slice) that have been added before this slice */
266		12	start_slice += FFMIN(slice, remainder_blocks);
267
268		12	end_slice = start_slice + base_blocks_per_slice;
269			/* Add an extra block if there are still remainder blocks to be accounted for */
270	✗✓	12	if (slice < remainder_blocks)
271			end_slice++;
272
273	✓✓	532	for (y = start_slice; y < end_slice; y++) {
274		520	uint8_t p = frame->data[0] + y frame->linesize[0] * TEXTURE_BLOCK_H;
275		520	int off = y * w_block;
276	✓✓	62984	for (x = 0; x < w_block; x++) {
277	✓✓	62464	if (texture_num == 0) {
278		60736	ctx->tex_fun(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
279		60736	d + (off + x) * ctx->tex_rat);
280			} else {
281		1728	ctx->tex_fun2(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
282		1728	d + (off + x) * ctx->tex_rat2);
283			}
284			}
285			}
286
287		12	return 0;
288			}
289
290		9	static int decompress_texture_thread(AVCodecContext avctx, void arg,
291			int slice, int thread_nb)
292			{
293		9	return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 0);
294			}
295
296		3	static int decompress_texture2_thread(AVCodecContext avctx, void arg,
297			int slice, int thread_nb)
298			{
299		3	return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 1);
300			}
301
302		9	static int hap_decode(AVCodecContext avctx, void data,
303			int got_frame, AVPacket avpkt)
304			{
305		9	HapContext *ctx = avctx->priv_data;
306			ThreadFrame tframe;
307			int ret, i, t;
308			int tex_size;
309			int section_size;
310			enum HapSectionType section_type;
311		9	int start_texture_section = 0;
312		9	int tex_rat[2] = {0, 0};
313
314		9	bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
315
316		9	tex_rat[0] = ctx->tex_rat;
317
318			/* check for multi texture header */
319	✓✓	9	if (ctx->texture_count == 2) {
320		3	ret = ff_hap_parse_section_header(&ctx->gbc, &section_size, &section_type);
321	✗✓	3	if (ret != 0)
322			return ret;
323	✗✓	3	if ((section_type & 0x0F) != 0x0D) {
324			av_log(avctx, AV_LOG_ERROR, "Invalid section type in 2 textures mode %#04x.\n", section_type);
325			return AVERROR_INVALIDDATA;
326			}
327		3	start_texture_section = 4;
328		3	tex_rat[1] = ctx->tex_rat2;
329			}
330
331			/* Get the output frame ready to receive data */
332		9	tframe.f = data;
333		9	ret = ff_thread_get_buffer(avctx, &tframe, 0);
334	✗✓	9	if (ret < 0)
335			return ret;
336
337	✓✓	21	for (t = 0; t < ctx->texture_count; t++) {
338		12	bytestream2_seek(&ctx->gbc, start_texture_section, SEEK_SET);
339
340			/* Check for section header */
341		12	ret = hap_parse_frame_header(avctx);
342	✗✓	12	if (ret < 0)
343			return ret;
344
345		12	start_texture_section += ctx->texture_section_size + 4;
346
347	✗✓	12	if (avctx->codec->update_thread_context)
348			ff_thread_finish_setup(avctx);
349
350			/* Unpack the DXT texture */
351	✓✓	12	if (hap_can_use_tex_in_place(ctx)) {
352			/* Only DXTC texture compression in a contiguous block */
353		3	ctx->tex_data = ctx->gbc.buffer;
354	✗✓	3	tex_size = FFMIN(ctx->texture_section_size, bytestream2_get_bytes_left(&ctx->gbc));
355			} else {
356			/* Perform the second-stage decompression */
357		9	ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
358	✗✓	9	if (ret < 0)
359			return ret;
360
361		9	avctx->execute2(avctx, decompress_chunks_thread, NULL,
362			ctx->chunk_results, ctx->chunk_count);
363
364	✓✓	59	for (i = 0; i < ctx->chunk_count; i++) {
365	✗✓	50	if (ctx->chunk_results[i] < 0)
366			return ctx->chunk_results[i];
367			}
368
369		9	ctx->tex_data = ctx->tex_buf;
370		9	tex_size = ctx->tex_size;
371			}
372
373		12	if (tex_size < (avctx->coded_width / TEXTURE_BLOCK_W)
374		12	*(avctx->coded_height / TEXTURE_BLOCK_H)
375	✗✓	12	*tex_rat[t]) {
376			av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
377			return AVERROR_INVALIDDATA;
378			}
379
380			/* Use the decompress function on the texture, one block per thread */
381	✓✓	12	if (t == 0){
382		9	avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
383			} else{
384		3	tframe.f = data;
385		3	avctx->execute2(avctx, decompress_texture2_thread, tframe.f, NULL, ctx->slice_count);
386			}
387			}
388
389			/* Frame is ready to be output */
390		9	tframe.f->pict_type = AV_PICTURE_TYPE_I;
391		9	tframe.f->key_frame = 1;
392		9	*got_frame = 1;
393
394		9	return avpkt->size;
395			}
396
397		28	static av_cold int hap_init(AVCodecContext *avctx)
398			{
399		28	HapContext *ctx = avctx->priv_data;
400			const char *texture_name;
401		28	int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
402
403	✗✓	28	if (ret < 0) {
404			av_log(avctx, AV_LOG_ERROR, "Invalid video size %dx%d.\n",
405			avctx->width, avctx->height);
406			return ret;
407			}
408
409			/* Since codec is based on 4x4 blocks, size is aligned to 4 */
410		28	avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
411		28	avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
412
413		28	ff_texturedsp_init(&ctx->dxtc);
414
415		28	ctx->texture_count = 1;
416		28	ctx->uncompress_pix_size = 4;
417
418	✓✓✓✓ ✓✗	28	switch (avctx->codec_tag) {
419		2	case MKTAG('H','a','p','1'):
420		2	texture_name = "DXT1";
421		2	ctx->tex_rat = 8;
422		2	ctx->tex_fun = ctx->dxtc.dxt1_block;
423		2	avctx->pix_fmt = AV_PIX_FMT_RGB0;
424		2	break;
425		2	case MKTAG('H','a','p','5'):
426		2	texture_name = "DXT5";
427		2	ctx->tex_rat = 16;
428		2	ctx->tex_fun = ctx->dxtc.dxt5_block;
429		2	avctx->pix_fmt = AV_PIX_FMT_RGBA;
430		2	break;
431		6	case MKTAG('H','a','p','Y'):
432		6	texture_name = "DXT5-YCoCg-scaled";
433		6	ctx->tex_rat = 16;
434		6	ctx->tex_fun = ctx->dxtc.dxt5ys_block;
435		6	avctx->pix_fmt = AV_PIX_FMT_RGB0;
436		6	break;
437		6	case MKTAG('H','a','p','A'):
438		6	texture_name = "RGTC1";
439		6	ctx->tex_rat = 8;
440		6	ctx->tex_fun = ctx->dxtc.rgtc1u_gray_block;
441		6	avctx->pix_fmt = AV_PIX_FMT_GRAY8;
442		6	ctx->uncompress_pix_size = 1;
443		6	break;
444		12	case MKTAG('H','a','p','M'):
445		12	texture_name = "DXT5-YCoCg-scaled / RGTC1";
446		12	ctx->tex_rat = 16;
447		12	ctx->tex_rat2 = 8;
448		12	ctx->tex_fun = ctx->dxtc.dxt5ys_block;
449		12	ctx->tex_fun2 = ctx->dxtc.rgtc1u_alpha_block;
450		12	avctx->pix_fmt = AV_PIX_FMT_RGBA;
451		12	ctx->texture_count = 2;
452		12	break;
453			default:
454			return AVERROR_DECODER_NOT_FOUND;
455			}
456
457		28	av_log(avctx, AV_LOG_DEBUG, "%s texture\n", texture_name);
458
459		28	ctx->slice_count = av_clip(avctx->thread_count, 1,
460		28	avctx->coded_height / TEXTURE_BLOCK_H);
461
462		28	return 0;
463			}
464
465		28	static av_cold int hap_close(AVCodecContext *avctx)
466			{
467		28	HapContext *ctx = avctx->priv_data;
468
469		28	ff_hap_free_context(ctx);
470
471		28	return 0;
472			}
473
474			AVCodec ff_hap_decoder = {
475			.name = "hap",
476			.long_name = NULL_IF_CONFIG_SMALL("Vidvox Hap"),
477			.type = AVMEDIA_TYPE_VIDEO,
478			.id = AV_CODEC_ID_HAP,
479			.init = hap_init,
480			.decode = hap_decode,
481			.close = hap_close,
482			.priv_data_size = sizeof(HapContext),
483			.capabilities = AV_CODEC_CAP_FRAME_THREADS \| AV_CODEC_CAP_SLICE_THREADS \|
484			AV_CODEC_CAP_DR1,
485			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE \|
486			FF_CODEC_CAP_INIT_CLEANUP,
487			.codec_tags = (const uint32_t []){
488			MKTAG('H','a','p','1'),
489			MKTAG('H','a','p','5'),
490			MKTAG('H','a','p','Y'),
491			MKTAG('H','a','p','A'),
492			MKTAG('H','a','p','M'),
493			FF_CODEC_TAGS_END,
494			},
495			};