FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/hq_hqa.c	Lines:	161	192	83.9 %
Date:	2020-04-02 05:41:20	Branches:	63	88	71.6 %


/*
 * Canopus HQ/HQA decoder
 *
 * 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
 */

#include <stdint.h>

#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.h"

#include "avcodec.h"
#include "canopus.h"
#include "get_bits.h"
#include "internal.h"

#include "hq_hqa.h"
#include "hq_hqadsp.h"

/* HQ/HQA slices are a set of macroblocks belonging to a frame, and
 * they usually form a pseudorandom pattern (probably because it is
 * nicer to display on partial decode).
 *
 * For HQA it just happens that each slice is on every 8th macroblock,
 * but they can be on any frame width like
 *   X.......X.
 *   ......X...
 *   ....X.....
 *   ..X.......
 * etc.
 *
 * The original decoder has special handling for edge macroblocks,
 * while lavc simply aligns coded_width and coded_height.
 */

static inline void put_blocks(HQContext *c, AVFrame *pic,
                              int plane, int x, int y, int ilace,
                              int16_t *block0, int16_t *block1)
{
    uint8_t *p = pic->data[plane] + x;

    c->hqhqadsp.idct_put(p + y * pic->linesize[plane],
                         pic->linesize[plane] << ilace, block0);
    c->hqhqadsp.idct_put(p + (y + (ilace ? 1 : 8)) * pic->linesize[plane],
                         pic->linesize[plane] << ilace, block1);
}

static int hq_decode_block(HQContext *c, GetBitContext *gb, int16_t block[64],
                           int qsel, int is_chroma, int is_hqa)
{
    const int32_t *q;
    int val, pos = 1;

    memset(block, 0, 64 * sizeof(*block));

    if (!is_hqa) {
        block[0] = get_sbits(gb, 9) * 64;
        q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
    } else {
        q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
        block[0] = get_sbits(gb, 9) * 64;
    }

    for (;;) {
        val = get_vlc2(gb, c->hq_ac_vlc.table, 9, 2);
        if (val < 0)
            return AVERROR_INVALIDDATA;

        pos += ff_hq_ac_skips[val];
        if (pos >= 64)
            break;
        block[ff_zigzag_direct[pos]] = (int)(ff_hq_ac_syms[val] * (unsigned)q[pos]) >> 12;
        pos++;
    }

    return 0;
}

static int hq_decode_mb(HQContext *c, AVFrame *pic,
                        GetBitContext *gb, int x, int y)
{
    int qgroup, flag;
    int i, ret;

    qgroup = get_bits(gb, 4);
    flag = get_bits1(gb);

    for (i = 0; i < 8; i++) {
        ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 4, 0);
        if (ret < 0)
            return ret;
    }

    put_blocks(c, pic, 0, x,      y, flag, c->block[0], c->block[2]);
    put_blocks(c, pic, 0, x + 8,  y, flag, c->block[1], c->block[3]);
    put_blocks(c, pic, 2, x >> 1, y, flag, c->block[4], c->block[5]);
    put_blocks(c, pic, 1, x >> 1, y, flag, c->block[6], c->block[7]);

    return 0;
}

static int hq_decode_frame(HQContext *ctx, AVFrame *pic,
                           int prof_num, size_t data_size)
{
    const HQProfile *profile;
    GetBitContext gb;
    const uint8_t *perm, *src = ctx->gbc.buffer;
    uint32_t slice_off[21];
    int slice, start_off, next_off, i, ret;

    if ((unsigned)prof_num >= NUM_HQ_PROFILES) {
        profile = &ff_hq_profile[0];
        avpriv_request_sample(ctx->avctx, "HQ Profile %d", prof_num);
    } else {
        profile = &ff_hq_profile[prof_num];
        av_log(ctx->avctx, AV_LOG_VERBOSE, "HQ Profile %d\n", prof_num);
    }

    ctx->avctx->coded_width         = FFALIGN(profile->width,  16);
    ctx->avctx->coded_height        = FFALIGN(profile->height, 16);
    ctx->avctx->width               = profile->width;
    ctx->avctx->height              = profile->height;
    ctx->avctx->bits_per_raw_sample = 8;
    ctx->avctx->pix_fmt             = AV_PIX_FMT_YUV422P;

    ret = ff_get_buffer(ctx->avctx, pic, 0);
    if (ret < 0)
        return ret;

    /* Offsets are stored from CUV position, so adjust them accordingly. */
    for (i = 0; i < profile->num_slices + 1; i++)
        slice_off[i] = bytestream2_get_be24(&ctx->gbc) - 4;

    next_off = 0;
    for (slice = 0; slice < profile->num_slices; slice++) {
        start_off = next_off;
        next_off  = profile->tab_h * (slice + 1) / profile->num_slices;
        perm = profile->perm_tab + start_off * profile->tab_w * 2;

        if (slice_off[slice] < (profile->num_slices + 1) * 3 ||
            slice_off[slice] >= slice_off[slice + 1] ||
            slice_off[slice + 1] > data_size) {
            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
            break;
        }
        init_get_bits(&gb, src + slice_off[slice],
                      (slice_off[slice + 1] - slice_off[slice]) * 8);

        for (i = 0; i < (next_off - start_off) * profile->tab_w; i++) {
            ret = hq_decode_mb(ctx, pic, &gb, perm[0] * 16, perm[1] * 16);
            if (ret < 0) {
                av_log(ctx->avctx, AV_LOG_ERROR,
                       "Error decoding macroblock %d at slice %d.\n", i, slice);
                return ret;
            }
            perm += 2;
        }
    }

    return 0;
}

static int hqa_decode_mb(HQContext *c, AVFrame *pic, int qgroup,
                         GetBitContext *gb, int x, int y)
{
    int flag = 0;
    int i, ret, cbp;

    if (get_bits_left(gb) < 1)
        return AVERROR_INVALIDDATA;

    cbp = get_vlc2(gb, c->hqa_cbp_vlc.table, 5, 1);

    for (i = 0; i < 12; i++)
        memset(c->block[i], 0, sizeof(*c->block));
    for (i = 0; i < 12; i++)
        c->block[i][0] = -128 * (1 << 6);

    if (cbp) {
        flag = get_bits1(gb);

        cbp |= cbp << 4;
        if (cbp & 0x3)
            cbp |= 0x500;
        if (cbp & 0xC)
            cbp |= 0xA00;
        for (i = 0; i < 12; i++) {
            if (!(cbp & (1 << i)))
                continue;
            ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 8, 1);
            if (ret < 0)
                return ret;
        }
    }

    put_blocks(c, pic, 3, x,      y, flag, c->block[ 0], c->block[ 2]);
    put_blocks(c, pic, 3, x + 8,  y, flag, c->block[ 1], c->block[ 3]);
    put_blocks(c, pic, 0, x,      y, flag, c->block[ 4], c->block[ 6]);
    put_blocks(c, pic, 0, x + 8,  y, flag, c->block[ 5], c->block[ 7]);
    put_blocks(c, pic, 2, x >> 1, y, flag, c->block[ 8], c->block[ 9]);
    put_blocks(c, pic, 1, x >> 1, y, flag, c->block[10], c->block[11]);

    return 0;
}

static int hqa_decode_slice(HQContext *ctx, AVFrame *pic, GetBitContext *gb,
                            int quant, int slice_no, int w, int h)
{
    int i, j, off;
    int ret;

    for (i = 0; i < h; i += 16) {
        off = (slice_no * 16 + i * 3) & 0x70;
        for (j = off; j < w; j += 128) {
            ret = hqa_decode_mb(ctx, pic, quant, gb, j, i);
            if (ret < 0) {
                av_log(ctx->avctx, AV_LOG_ERROR,
                       "Error decoding macroblock at %dx%d.\n", i, j);
                return ret;
            }
        }
    }

    return 0;
}

static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
{
    GetBitContext gb;
    const int num_slices = 8;
    uint32_t slice_off[9];
    int i, slice, ret;
    int width, height, quant;
    const uint8_t *src = ctx->gbc.buffer;

    if (bytestream2_get_bytes_left(&ctx->gbc) < 8 + 4*(num_slices + 1))
        return AVERROR_INVALIDDATA;

    width  = bytestream2_get_be16(&ctx->gbc);
    height = bytestream2_get_be16(&ctx->gbc);

    ret = ff_set_dimensions(ctx->avctx, width, height);
    if (ret < 0)
        return ret;

    ctx->avctx->coded_width         = FFALIGN(width,  16);
    ctx->avctx->coded_height        = FFALIGN(height, 16);
    ctx->avctx->bits_per_raw_sample = 8;
    ctx->avctx->pix_fmt             = AV_PIX_FMT_YUVA422P;

    av_log(ctx->avctx, AV_LOG_VERBOSE, "HQA Profile\n");

    quant = bytestream2_get_byte(&ctx->gbc);
    bytestream2_skip(&ctx->gbc, 3);
    if (quant >= NUM_HQ_QUANTS) {
        av_log(ctx->avctx, AV_LOG_ERROR,
               "Invalid quantization matrix %d.\n", quant);
        return AVERROR_INVALIDDATA;
    }

    ret = ff_get_buffer(ctx->avctx, pic, 0);
    if (ret < 0)
        return ret;

    /* Offsets are stored from HQA1 position, so adjust them accordingly. */
    for (i = 0; i < num_slices + 1; i++)
        slice_off[i] = bytestream2_get_be32(&ctx->gbc) - 4;

    for (slice = 0; slice < num_slices; slice++) {
        if (slice_off[slice] < (num_slices + 1) * 3 ||
            slice_off[slice] >= slice_off[slice + 1] ||
            slice_off[slice + 1] > data_size) {
            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
            break;
        }
        init_get_bits(&gb, src + slice_off[slice],
                      (slice_off[slice + 1] - slice_off[slice]) * 8);

        ret = hqa_decode_slice(ctx, pic, &gb, quant, slice, width, height);
        if (ret < 0)
            return ret;
    }

    return 0;
}

static int hq_hqa_decode_frame(AVCodecContext *avctx, void *data,
                               int *got_frame, AVPacket *avpkt)
{
    HQContext *ctx = avctx->priv_data;
    AVFrame *pic = data;
    uint32_t info_tag;
    unsigned int data_size;
    int ret;
    unsigned tag;

    bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
    if (bytestream2_get_bytes_left(&ctx->gbc) < 4 + 4) {
        av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", avpkt->size);
        return AVERROR_INVALIDDATA;
    }

    info_tag = bytestream2_peek_le32(&ctx->gbc);
    if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
        int info_size;
        bytestream2_skip(&ctx->gbc, 4);
        info_size = bytestream2_get_le32(&ctx->gbc);
        if (bytestream2_get_bytes_left(&ctx->gbc) < info_size) {
            av_log(avctx, AV_LOG_ERROR, "Invalid INFO size (%d).\n", info_size);
            return AVERROR_INVALIDDATA;
        }
        ff_canopus_parse_info_tag(avctx, ctx->gbc.buffer, info_size);

        bytestream2_skip(&ctx->gbc, info_size);
    }

    data_size = bytestream2_get_bytes_left(&ctx->gbc);
    if (data_size < 4) {
        av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", data_size);
        return AVERROR_INVALIDDATA;
    }

    /* HQ defines dimensions and number of slices, and thus slice traversal
     * order. HQA has no size constraint and a fixed number of slices, so it
     * needs a separate scheme for it. */
    tag = bytestream2_get_le32(&ctx->gbc);
    if ((tag & 0x00FFFFFF) == (MKTAG('U', 'V', 'C', ' ') & 0x00FFFFFF)) {
        ret = hq_decode_frame(ctx, pic, tag >> 24, data_size);
    } else if (tag == MKTAG('H', 'Q', 'A', '1')) {
        ret = hqa_decode_frame(ctx, pic, data_size);
    } else {
        av_log(avctx, AV_LOG_ERROR, "Not a HQ/HQA frame.\n");
        return AVERROR_INVALIDDATA;
    }
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Error decoding frame.\n");
        return ret;
    }

    pic->key_frame = 1;
    pic->pict_type = AV_PICTURE_TYPE_I;

    *got_frame = 1;

    return avpkt->size;
}

static av_cold int hq_hqa_decode_init(AVCodecContext *avctx)
{
    HQContext *ctx = avctx->priv_data;
    ctx->avctx = avctx;

    ff_hqdsp_init(&ctx->hqhqadsp);

    return ff_hq_init_vlcs(ctx);
}

static av_cold int hq_hqa_decode_close(AVCodecContext *avctx)
{
    HQContext *ctx = avctx->priv_data;

    ff_free_vlc(&ctx->hq_ac_vlc);
    ff_free_vlc(&ctx->hqa_cbp_vlc);

    return 0;
}

AVCodec ff_hq_hqa_decoder = {
    .name           = "hq_hqa",
    .long_name      = NULL_IF_CONFIG_SMALL("Canopus HQ/HQA"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_HQ_HQA,
    .priv_data_size = sizeof(HQContext),
    .init           = hq_hqa_decode_init,
    .decode         = hq_hqa_decode_frame,
    .close          = hq_hqa_decode_close,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
                      FF_CODEC_CAP_INIT_CLEANUP,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Canopus HQ/HQA decoder
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			#include <stdint.h>
22
23			#include "libavutil/attributes.h"
24			#include "libavutil/intreadwrite.h"
25
26			#include "avcodec.h"
27			#include "canopus.h"
28			#include "get_bits.h"
29			#include "internal.h"
30
31			#include "hq_hqa.h"
32			#include "hq_hqadsp.h"
33
34			/* HQ/HQA slices are a set of macroblocks belonging to a frame, and
35			* they usually form a pseudorandom pattern (probably because it is
36			* nicer to display on partial decode).
37			*
38			* For HQA it just happens that each slice is on every 8th macroblock,
39			* but they can be on any frame width like
40			* X.......X.
41			* ......X...
42			* ....X.....
43			* ..X.......
44			* etc.
45			*
46			* The original decoder has special handling for edge macroblocks,
47			* while lavc simply aligns coded_width and coded_height.
48			*/
49
50		221520	static inline void put_blocks(HQContext c, AVFrame pic,
51			int plane, int x, int y, int ilace,
52			int16_t block0, int16_t block1)
53			{
54		221520	uint8_t *p = pic->data[plane] + x;
55
56		221520	c->hqhqadsp.idct_put(p + y * pic->linesize[plane],
57		221520	pic->linesize[plane] << ilace, block0);
58		221520	c->hqhqadsp.idct_put(p + (y + (ilace ? 1 : 8)) * pic->linesize[plane],
59	✓✓	221520	pic->linesize[plane] << ilace, block1);
60		221520	}
61
62		365300	static int hq_decode_block(HQContext c, GetBitContext gb, int16_t block[64],
63			int qsel, int is_chroma, int is_hqa)
64			{
65			const int32_t *q;
66		365300	int val, pos = 1;
67
68		365300	memset(block, 0, 64 * sizeof(*block));
69
70	✓✓	365300	if (!is_hqa) {
71		247200	block[0] = get_sbits(gb, 9) * 64;
72		247200	q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
73			} else {
74		118100	q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
75		118100	block[0] = get_sbits(gb, 9) * 64;
76			}
77
78			for (;;) {
79		5841374	val = get_vlc2(gb, c->hq_ac_vlc.table, 9, 2);
80	✗✓	5841374	if (val < 0)
81			return AVERROR_INVALIDDATA;
82
83		5841374	pos += ff_hq_ac_skips[val];
84	✓✓	5841374	if (pos >= 64)
85		365300	break;
86		5476074	block[ff_zigzag_direct[pos]] = (int)(ff_hq_ac_syms[val] * (unsigned)q[pos]) >> 12;
87		5476074	pos++;
88			}
89
90		365300	return 0;
91			}
92
93		30900	static int hq_decode_mb(HQContext c, AVFrame pic,
94			GetBitContext *gb, int x, int y)
95			{
96			int qgroup, flag;
97			int i, ret;
98
99		30900	qgroup = get_bits(gb, 4);
100		30900	flag = get_bits1(gb);
101
102	✓✓	278100	for (i = 0; i < 8; i++) {
103		247200	ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 4, 0);
104	✗✓	247200	if (ret < 0)
105			return ret;
106			}
107
108		30900	put_blocks(c, pic, 0, x, y, flag, c->block[0], c->block[2]);
109		30900	put_blocks(c, pic, 0, x + 8, y, flag, c->block[1], c->block[3]);
110		30900	put_blocks(c, pic, 2, x >> 1, y, flag, c->block[4], c->block[5]);
111		30900	put_blocks(c, pic, 1, x >> 1, y, flag, c->block[6], c->block[7]);
112
113		30900	return 0;
114			}
115
116		11	static int hq_decode_frame(HQContext ctx, AVFrame pic,
117			int prof_num, size_t data_size)
118			{
119			const HQProfile *profile;
120			GetBitContext gb;
121		11	const uint8_t perm, src = ctx->gbc.buffer;
122			uint32_t slice_off[21];
123			int slice, start_off, next_off, i, ret;
124
125	✗✓	11	if ((unsigned)prof_num >= NUM_HQ_PROFILES) {
126			profile = &ff_hq_profile[0];
127			avpriv_request_sample(ctx->avctx, "HQ Profile %d", prof_num);
128			} else {
129		11	profile = &ff_hq_profile[prof_num];
130		11	av_log(ctx->avctx, AV_LOG_VERBOSE, "HQ Profile %d\n", prof_num);
131			}
132
133		11	ctx->avctx->coded_width = FFALIGN(profile->width, 16);
134		11	ctx->avctx->coded_height = FFALIGN(profile->height, 16);
135		11	ctx->avctx->width = profile->width;
136		11	ctx->avctx->height = profile->height;
137		11	ctx->avctx->bits_per_raw_sample = 8;
138		11	ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
139
140		11	ret = ff_get_buffer(ctx->avctx, pic, 0);
141	✗✓	11	if (ret < 0)
142			return ret;
143
144			/* Offsets are stored from CUV position, so adjust them accordingly. */
145	✓✓	134	for (i = 0; i < profile->num_slices + 1; i++)
146		123	slice_off[i] = bytestream2_get_be24(&ctx->gbc) - 4;
147
148		11	next_off = 0;
149	✓✓	123	for (slice = 0; slice < profile->num_slices; slice++) {
150		112	start_off = next_off;
151		112	next_off = profile->tab_h * (slice + 1) / profile->num_slices;
152		112	perm = profile->perm_tab + start_off * profile->tab_w * 2;
153
154	✓✗	112	if (slice_off[slice] < (profile->num_slices + 1) * 3 \|\|
155	✓✗	112	slice_off[slice] >= slice_off[slice + 1] \|\|
156	✗✓	112	slice_off[slice + 1] > data_size) {
157			av_log(ctx->avctx, AV_LOG_ERROR,
158			"Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
159			break;
160			}
161		112	init_get_bits(&gb, src + slice_off[slice],
162		112	(slice_off[slice + 1] - slice_off[slice]) * 8);
163
164	✓✓	31012	for (i = 0; i < (next_off - start_off) * profile->tab_w; i++) {
165		30900	ret = hq_decode_mb(ctx, pic, &gb, perm[0] * 16, perm[1] * 16);
166	✗✓	30900	if (ret < 0) {
167			av_log(ctx->avctx, AV_LOG_ERROR,
168			"Error decoding macroblock %d at slice %d.\n", i, slice);
169			return ret;
170			}
171		30900	perm += 2;
172			}
173			}
174
175		11	return 0;
176			}
177
178		16320	static int hqa_decode_mb(HQContext c, AVFrame pic, int qgroup,
179			GetBitContext *gb, int x, int y)
180			{
181		16320	int flag = 0;
182			int i, ret, cbp;
183
184	✗✓	16320	if (get_bits_left(gb) < 1)
185			return AVERROR_INVALIDDATA;
186
187		16320	cbp = get_vlc2(gb, c->hqa_cbp_vlc.table, 5, 1);
188
189	✓✓	212160	for (i = 0; i < 12; i++)
190		195840	memset(c->block[i], 0, sizeof(*c->block));
191	✓✓	212160	for (i = 0; i < 12; i++)
192		195840	c->block[i][0] = -128 * (1 << 6);
193
194	✓✓	16320	if (cbp) {
195		9978	flag = get_bits1(gb);
196
197		9978	cbp \|= cbp << 4;
198	✓✓	9978	if (cbp & 0x3)
199		9890	cbp \|= 0x500;
200	✓✓	9978	if (cbp & 0xC)
201		9874	cbp \|= 0xA00;
202	✓✓	129714	for (i = 0; i < 12; i++) {
203	✓✓	119736	if (!(cbp & (1 << i)))
204		1636	continue;
205		118100	ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 8, 1);
206	✗✓	118100	if (ret < 0)
207			return ret;
208			}
209			}
210
211		16320	put_blocks(c, pic, 3, x, y, flag, c->block[ 0], c->block[ 2]);
212		16320	put_blocks(c, pic, 3, x + 8, y, flag, c->block[ 1], c->block[ 3]);
213		16320	put_blocks(c, pic, 0, x, y, flag, c->block[ 4], c->block[ 6]);
214		16320	put_blocks(c, pic, 0, x + 8, y, flag, c->block[ 5], c->block[ 7]);
215		16320	put_blocks(c, pic, 2, x >> 1, y, flag, c->block[ 8], c->block[ 9]);
216		16320	put_blocks(c, pic, 1, x >> 1, y, flag, c->block[10], c->block[11]);
217
218		16320	return 0;
219			}
220
221		16	static int hqa_decode_slice(HQContext ctx, AVFrame pic, GetBitContext *gb,
222			int quant, int slice_no, int w, int h)
223			{
224			int i, j, off;
225			int ret;
226
227	✓✓	1104	for (i = 0; i < h; i += 16) {
228		1088	off = (slice_no * 16 + i * 3) & 0x70;
229	✓✓	17408	for (j = off; j < w; j += 128) {
230		16320	ret = hqa_decode_mb(ctx, pic, quant, gb, j, i);
231	✗✓	16320	if (ret < 0) {
232			av_log(ctx->avctx, AV_LOG_ERROR,
233			"Error decoding macroblock at %dx%d.\n", i, j);
234			return ret;
235			}
236			}
237			}
238
239		16	return 0;
240			}
241
242		2	static int hqa_decode_frame(HQContext ctx, AVFrame pic, size_t data_size)
243			{
244			GetBitContext gb;
245		2	const int num_slices = 8;
246			uint32_t slice_off[9];
247			int i, slice, ret;
248			int width, height, quant;
249		2	const uint8_t *src = ctx->gbc.buffer;
250
251	✗✓	2	if (bytestream2_get_bytes_left(&ctx->gbc) < 8 + 4*(num_slices + 1))
252			return AVERROR_INVALIDDATA;
253
254		2	width = bytestream2_get_be16(&ctx->gbc);
255		2	height = bytestream2_get_be16(&ctx->gbc);
256
257		2	ret = ff_set_dimensions(ctx->avctx, width, height);
258	✗✓	2	if (ret < 0)
259			return ret;
260
261		2	ctx->avctx->coded_width = FFALIGN(width, 16);
262		2	ctx->avctx->coded_height = FFALIGN(height, 16);
263		2	ctx->avctx->bits_per_raw_sample = 8;
264		2	ctx->avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
265
266		2	av_log(ctx->avctx, AV_LOG_VERBOSE, "HQA Profile\n");
267
268		2	quant = bytestream2_get_byte(&ctx->gbc);
269		2	bytestream2_skip(&ctx->gbc, 3);
270	✗✓	2	if (quant >= NUM_HQ_QUANTS) {
271			av_log(ctx->avctx, AV_LOG_ERROR,
272			"Invalid quantization matrix %d.\n", quant);
273			return AVERROR_INVALIDDATA;
274			}
275
276		2	ret = ff_get_buffer(ctx->avctx, pic, 0);
277	✗✓	2	if (ret < 0)
278			return ret;
279
280			/* Offsets are stored from HQA1 position, so adjust them accordingly. */
281	✓✓	20	for (i = 0; i < num_slices + 1; i++)
282		18	slice_off[i] = bytestream2_get_be32(&ctx->gbc) - 4;
283
284	✓✓	18	for (slice = 0; slice < num_slices; slice++) {
285	✓✗	16	if (slice_off[slice] < (num_slices + 1) * 3 \|\|
286	✓✗	16	slice_off[slice] >= slice_off[slice + 1] \|\|
287	✗✓	16	slice_off[slice + 1] > data_size) {
288			av_log(ctx->avctx, AV_LOG_ERROR,
289			"Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
290			break;
291			}
292		16	init_get_bits(&gb, src + slice_off[slice],
293		16	(slice_off[slice + 1] - slice_off[slice]) * 8);
294
295		16	ret = hqa_decode_slice(ctx, pic, &gb, quant, slice, width, height);
296	✗✓	16	if (ret < 0)
297			return ret;
298			}
299
300		2	return 0;
301			}
302
303		13	static int hq_hqa_decode_frame(AVCodecContext avctx, void data,
304			int got_frame, AVPacket avpkt)
305			{
306		13	HQContext *ctx = avctx->priv_data;
307		13	AVFrame *pic = data;
308			uint32_t info_tag;
309			unsigned int data_size;
310			int ret;
311			unsigned tag;
312
313		13	bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
314	✗✓	13	if (bytestream2_get_bytes_left(&ctx->gbc) < 4 + 4) {
315			av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", avpkt->size);
316			return AVERROR_INVALIDDATA;
317			}
318
319		13	info_tag = bytestream2_peek_le32(&ctx->gbc);
320	✓✗	13	if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
321			int info_size;
322		13	bytestream2_skip(&ctx->gbc, 4);
323		13	info_size = bytestream2_get_le32(&ctx->gbc);
324	✗✓	13	if (bytestream2_get_bytes_left(&ctx->gbc) < info_size) {
325			av_log(avctx, AV_LOG_ERROR, "Invalid INFO size (%d).\n", info_size);
326			return AVERROR_INVALIDDATA;
327			}
328		13	ff_canopus_parse_info_tag(avctx, ctx->gbc.buffer, info_size);
329
330		13	bytestream2_skip(&ctx->gbc, info_size);
331			}
332
333		13	data_size = bytestream2_get_bytes_left(&ctx->gbc);
334	✗✓	13	if (data_size < 4) {
335			av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", data_size);
336			return AVERROR_INVALIDDATA;
337			}
338
339			/* HQ defines dimensions and number of slices, and thus slice traversal
340			* order. HQA has no size constraint and a fixed number of slices, so it
341			* needs a separate scheme for it. */
342		13	tag = bytestream2_get_le32(&ctx->gbc);
343	✓✓	13	if ((tag & 0x00FFFFFF) == (MKTAG('U', 'V', 'C', ' ') & 0x00FFFFFF)) {
344		11	ret = hq_decode_frame(ctx, pic, tag >> 24, data_size);
345	✓✗	2	} else if (tag == MKTAG('H', 'Q', 'A', '1')) {
346		2	ret = hqa_decode_frame(ctx, pic, data_size);
347			} else {
348			av_log(avctx, AV_LOG_ERROR, "Not a HQ/HQA frame.\n");
349			return AVERROR_INVALIDDATA;
350			}
351	✗✓	13	if (ret < 0) {
352			av_log(avctx, AV_LOG_ERROR, "Error decoding frame.\n");
353			return ret;
354			}
355
356		13	pic->key_frame = 1;
357		13	pic->pict_type = AV_PICTURE_TYPE_I;
358
359		13	*got_frame = 1;
360
361		13	return avpkt->size;
362			}
363
364		6	static av_cold int hq_hqa_decode_init(AVCodecContext *avctx)
365			{
366		6	HQContext *ctx = avctx->priv_data;
367		6	ctx->avctx = avctx;
368
369		6	ff_hqdsp_init(&ctx->hqhqadsp);
370
371		6	return ff_hq_init_vlcs(ctx);
372			}
373
374		6	static av_cold int hq_hqa_decode_close(AVCodecContext *avctx)
375			{
376		6	HQContext *ctx = avctx->priv_data;
377
378		6	ff_free_vlc(&ctx->hq_ac_vlc);
379		6	ff_free_vlc(&ctx->hqa_cbp_vlc);
380
381		6	return 0;
382			}
383
384			AVCodec ff_hq_hqa_decoder = {
385			.name = "hq_hqa",
386			.long_name = NULL_IF_CONFIG_SMALL("Canopus HQ/HQA"),
387			.type = AVMEDIA_TYPE_VIDEO,
388			.id = AV_CODEC_ID_HQ_HQA,
389			.priv_data_size = sizeof(HQContext),
390			.init = hq_hqa_decode_init,
391			.decode = hq_hqa_decode_frame,
392			.close = hq_hqa_decode_close,
393			.capabilities = AV_CODEC_CAP_DR1,
394			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE \|
395			FF_CODEC_CAP_INIT_CLEANUP,
396			};