FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/cllc.c	Lines:	192	234	82.1 %
Date:	2020-09-28 00:47:38	Branches:	70	98	71.4 %


/*
 * Canopus Lossless Codec decoder
 *
 * Copyright (c) 2012-2013 Derek Buitenhuis
 *
 * 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 <inttypes.h>

#include "libavutil/intreadwrite.h"
#include "bswapdsp.h"
#include "canopus.h"
#include "get_bits.h"
#include "avcodec.h"
#include "internal.h"
#include "thread.h"

#define VLC_BITS 7
#define VLC_DEPTH 2


typedef struct CLLCContext {
    AVCodecContext *avctx;
    BswapDSPContext bdsp;

    uint8_t *swapped_buf;
    int      swapped_buf_size;
} CLLCContext;

static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc)
{
    uint8_t symbols[256];
    uint8_t bits[256];
    uint16_t codes[256];
    int num_lens, num_codes, num_codes_sum, prefix;
    int i, j, count;

    prefix        = 0;
    count         = 0;
    num_codes_sum = 0;

    num_lens = get_bits(gb, 5);

    if (num_lens > VLC_BITS * VLC_DEPTH) {
        vlc->table = NULL;

        av_log(ctx->avctx, AV_LOG_ERROR, "To long VLCs %d\n", num_lens);
        return AVERROR_INVALIDDATA;
    }

    for (i = 0; i < num_lens; i++) {
        num_codes      = get_bits(gb, 9);
        num_codes_sum += num_codes;

        if (num_codes_sum > 256) {
            vlc->table = NULL;

            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Too many VLCs (%d) to be read.\n", num_codes_sum);
            return AVERROR_INVALIDDATA;
        }

        for (j = 0; j < num_codes; j++) {
            symbols[count] = get_bits(gb, 8);
            bits[count]    = i + 1;
            codes[count]   = prefix++;

            count++;
        }
        if (prefix > (65535 - 256)/2) {
            vlc->table = NULL;
            return AVERROR_INVALIDDATA;
        }

        prefix <<= 1;
    }

    return ff_init_vlc_sparse(vlc, VLC_BITS, count, bits, 1, 1,
                              codes, 2, 2, symbols, 1, 1, 0);
}

/*
 * Unlike the RGB24 read/restore, which reads in a component at a time,
 * ARGB read/restore reads in ARGB quads.
 */
static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left,
                          VLC *vlc, uint8_t *outbuf)
{
    uint8_t *dst;
    int pred[4];
    int code;
    int i;

    OPEN_READER(bits, gb);

    dst     = outbuf;
    pred[0] = top_left[0];
    pred[1] = top_left[1];
    pred[2] = top_left[2];
    pred[3] = top_left[3];

    for (i = 0; i < ctx->avctx->width; i++) {
        /* Always get the alpha component */
        UPDATE_CACHE(bits, gb);
        GET_VLC(code, bits, gb, vlc[0].table, VLC_BITS, VLC_DEPTH);

        pred[0] += code;
        dst[0]   = pred[0];

        /* Skip the components if they are  entirely transparent */
        if (dst[0]) {
            /* Red */
            UPDATE_CACHE(bits, gb);
            GET_VLC(code, bits, gb, vlc[1].table, VLC_BITS, VLC_DEPTH);

            pred[1] += code;
            dst[1]   = pred[1];

            /* Green */
            UPDATE_CACHE(bits, gb);
            GET_VLC(code, bits, gb, vlc[2].table, VLC_BITS, VLC_DEPTH);

            pred[2] += code;
            dst[2]   = pred[2];

            /* Blue */
            UPDATE_CACHE(bits, gb);
            GET_VLC(code, bits, gb, vlc[3].table, VLC_BITS, VLC_DEPTH);

            pred[3] += code;
            dst[3]   = pred[3];
        } else {
            dst[1] = 0;
            dst[2] = 0;
            dst[3] = 0;
        }

        dst += 4;
    }

    CLOSE_READER(bits, gb);

    top_left[0]  = outbuf[0];

    /* Only stash components if they are not transparent */
    if (top_left[0]) {
        top_left[1] = outbuf[1];
        top_left[2] = outbuf[2];
        top_left[3] = outbuf[3];
    }

    return 0;
}

static int read_rgb24_component_line(CLLCContext *ctx, GetBitContext *gb,
                                     int *top_left, VLC *vlc, uint8_t *outbuf)
{
    uint8_t *dst;
    int pred, code;
    int i;

    OPEN_READER(bits, gb);

    dst  = outbuf;
    pred = *top_left;

    /* Simultaneously read and restore the line */
    for (i = 0; i < ctx->avctx->width; i++) {
        UPDATE_CACHE(bits, gb);
        GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);

        pred  += code;
        dst[0] = pred;
        dst   += 3;
    }

    CLOSE_READER(bits, gb);

    /* Stash the first pixel */
    *top_left = outbuf[0];

    return 0;
}

static int read_yuv_component_line(CLLCContext *ctx, GetBitContext *gb,
                                   int *top_left, VLC *vlc, uint8_t *outbuf,
                                   int is_chroma)
{
    int pred, code;
    int i;

    OPEN_READER(bits, gb);

    pred = *top_left;

    /* Simultaneously read and restore the line */
    for (i = 0; i < ctx->avctx->width >> is_chroma; i++) {
        UPDATE_CACHE(bits, gb);
        GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);

        pred     += code;
        outbuf[i] = pred;
    }

    CLOSE_READER(bits, gb);

    /* Stash the first pixel */
    *top_left = outbuf[0];

    return 0;
}

static int decode_argb_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
{
    AVCodecContext *avctx = ctx->avctx;
    uint8_t *dst;
    int pred[4];
    int ret;
    int i, j;
    VLC vlc[4];

    pred[0] = 0;
    pred[1] = 0x80;
    pred[2] = 0x80;
    pred[3] = 0x80;

    dst = pic->data[0];

    skip_bits(gb, 16);

    /* Read in code table for each plane */
    for (i = 0; i < 4; i++) {
        ret = read_code_table(ctx, gb, &vlc[i]);
        if (ret < 0) {
            for (j = 0; j <= i; j++)
                ff_free_vlc(&vlc[j]);

            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Could not read code table %d.\n", i);
            return ret;
        }
    }

    /* Read in and restore every line */
    for (i = 0; i < avctx->height; i++) {
        read_argb_line(ctx, gb, pred, vlc, dst);

        dst += pic->linesize[0];
    }

    for (i = 0; i < 4; i++)
        ff_free_vlc(&vlc[i]);

    return 0;
}

static int decode_rgb24_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
{
    AVCodecContext *avctx = ctx->avctx;
    uint8_t *dst;
    int pred[3];
    int ret;
    int i, j;
    VLC vlc[3];

    pred[0] = 0x80;
    pred[1] = 0x80;
    pred[2] = 0x80;

    dst = pic->data[0];

    skip_bits(gb, 16);

    /* Read in code table for each plane */
    for (i = 0; i < 3; i++) {
        ret = read_code_table(ctx, gb, &vlc[i]);
        if (ret < 0) {
            for (j = 0; j <= i; j++)
                ff_free_vlc(&vlc[j]);

            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Could not read code table %d.\n", i);
            return ret;
        }
    }

    /* Read in and restore every line */
    for (i = 0; i < avctx->height; i++) {
        for (j = 0; j < 3; j++)
            read_rgb24_component_line(ctx, gb, &pred[j], &vlc[j], &dst[j]);

        dst += pic->linesize[0];
    }

    for (i = 0; i < 3; i++)
        ff_free_vlc(&vlc[i]);

    return 0;
}

static int decode_yuv_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
{
    AVCodecContext *avctx = ctx->avctx;
    uint8_t block;
    uint8_t *dst[3];
    int pred[3];
    int ret;
    int i, j;
    VLC vlc[2];

    pred[0] = 0x80;
    pred[1] = 0x80;
    pred[2] = 0x80;

    dst[0] = pic->data[0];
    dst[1] = pic->data[1];
    dst[2] = pic->data[2];

    skip_bits(gb, 8);

    block = get_bits(gb, 8);
    if (block) {
        avpriv_request_sample(ctx->avctx, "Blocked YUV");
        return AVERROR_PATCHWELCOME;
    }

    /* Read in code table for luma and chroma */
    for (i = 0; i < 2; i++) {
        ret = read_code_table(ctx, gb, &vlc[i]);
        if (ret < 0) {
            for (j = 0; j <= i; j++)
                ff_free_vlc(&vlc[j]);

            av_log(ctx->avctx, AV_LOG_ERROR,
                   "Could not read code table %d.\n", i);
            return ret;
        }
    }

    /* Read in and restore every line */
    for (i = 0; i < avctx->height; i++) {
        read_yuv_component_line(ctx, gb, &pred[0], &vlc[0], dst[0], 0); /* Y */
        read_yuv_component_line(ctx, gb, &pred[1], &vlc[1], dst[1], 1); /* U */
        read_yuv_component_line(ctx, gb, &pred[2], &vlc[1], dst[2], 1); /* V */

        for (j = 0; j < 3; j++)
            dst[j] += pic->linesize[j];
    }

    for (i = 0; i < 2; i++)
        ff_free_vlc(&vlc[i]);

    return 0;
}

static int cllc_decode_frame(AVCodecContext *avctx, void *data,
                             int *got_picture_ptr, AVPacket *avpkt)
{
    CLLCContext *ctx = avctx->priv_data;
    AVFrame *pic = data;
    ThreadFrame frame = { .f = data };
    uint8_t *src = avpkt->data;
    uint32_t info_tag, info_offset;
    int data_size;
    GetBitContext gb;
    int coding_type, ret;

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

    info_offset = 0;
    info_tag    = AV_RL32(src);
    if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
        info_offset = AV_RL32(src + 4);
        if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) {
            av_log(avctx, AV_LOG_ERROR,
                   "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n",
                   info_offset);
            return AVERROR_INVALIDDATA;
        }
        ff_canopus_parse_info_tag(avctx, src + 8, info_offset);

        info_offset += 8;
        src         += info_offset;
    }

    data_size = (avpkt->size - info_offset) & ~1;

    /* Make sure our bswap16'd buffer is big enough */
    av_fast_padded_malloc(&ctx->swapped_buf,
                          &ctx->swapped_buf_size, data_size);
    if (!ctx->swapped_buf) {
        av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n");
        return AVERROR(ENOMEM);
    }

    /* bswap16 the buffer since CLLC's bitreader works in 16-bit words */
    ctx->bdsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src,
                          data_size / 2);

    if ((ret = init_get_bits8(&gb, ctx->swapped_buf, data_size)) < 0)
        return ret;

    /*
     * Read in coding type. The types are as follows:
     *
     * 0 - YUY2
     * 1 - BGR24 (Triples)
     * 2 - BGR24 (Quads)
     * 3 - BGRA
     */
    coding_type = (AV_RL32(src) >> 8) & 0xFF;
    av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type);

    if(get_bits_left(&gb) < avctx->height * avctx->width)
        return AVERROR_INVALIDDATA;

    switch (coding_type) {
    case 0:
        avctx->pix_fmt             = AV_PIX_FMT_YUV422P;
        avctx->bits_per_raw_sample = 8;

        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
            return ret;

        ret = decode_yuv_frame(ctx, &gb, pic);
        if (ret < 0)
            return ret;

        break;
    case 1:
    case 2:
        avctx->pix_fmt             = AV_PIX_FMT_RGB24;
        avctx->bits_per_raw_sample = 8;

        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
            return ret;

        ret = decode_rgb24_frame(ctx, &gb, pic);
        if (ret < 0)
            return ret;

        break;
    case 3:
        avctx->pix_fmt             = AV_PIX_FMT_ARGB;
        avctx->bits_per_raw_sample = 8;

        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
            return ret;

        ret = decode_argb_frame(ctx, &gb, pic);
        if (ret < 0)
            return ret;

        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type);
        return AVERROR_INVALIDDATA;
    }

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

    *got_picture_ptr = 1;

    return avpkt->size;
}

static av_cold int cllc_decode_close(AVCodecContext *avctx)
{
    CLLCContext *ctx = avctx->priv_data;

    av_freep(&ctx->swapped_buf);

    return 0;
}

static av_cold int cllc_decode_init(AVCodecContext *avctx)
{
    CLLCContext *ctx = avctx->priv_data;

    /* Initialize various context values */
    ctx->avctx            = avctx;
    ctx->swapped_buf      = NULL;
    ctx->swapped_buf_size = 0;

    ff_bswapdsp_init(&ctx->bdsp);

    return 0;
}

AVCodec ff_cllc_decoder = {
    .name           = "cllc",
    .long_name      = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_CLLC,
    .priv_data_size = sizeof(CLLCContext),
    .init           = cllc_decode_init,
    .decode         = cllc_decode_frame,
    .close          = cllc_decode_close,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Canopus Lossless Codec decoder
3			*
4			* Copyright (c) 2012-2013 Derek Buitenhuis
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			#include <inttypes.h>
24
25			#include "libavutil/intreadwrite.h"
26			#include "bswapdsp.h"
27			#include "canopus.h"
28			#include "get_bits.h"
29			#include "avcodec.h"
30			#include "internal.h"
31			#include "thread.h"
32
33			#define VLC_BITS 7
34			#define VLC_DEPTH 2
35
36
37			typedef struct CLLCContext {
38			AVCodecContext *avctx;
39			BswapDSPContext bdsp;
40
41			uint8_t *swapped_buf;
42			int swapped_buf_size;
43			} CLLCContext;
44
45		106	static int read_code_table(CLLCContext ctx, GetBitContext gb, VLC *vlc)
46			{
47			uint8_t symbols[256];
48			uint8_t bits[256];
49			uint16_t codes[256];
50			int num_lens, num_codes, num_codes_sum, prefix;
51			int i, j, count;
52
53		106	prefix = 0;
54		106	count = 0;
55		106	num_codes_sum = 0;
56
57		106	num_lens = get_bits(gb, 5);
58
59	✗✓	106	if (num_lens > VLC_BITS * VLC_DEPTH) {
60			vlc->table = NULL;
61
62			av_log(ctx->avctx, AV_LOG_ERROR, "To long VLCs %d\n", num_lens);
63			return AVERROR_INVALIDDATA;
64			}
65
66	✓✓	1545	for (i = 0; i < num_lens; i++) {
67		1439	num_codes = get_bits(gb, 9);
68		1439	num_codes_sum += num_codes;
69
70	✗✓	1439	if (num_codes_sum > 256) {
71			vlc->table = NULL;
72
73			av_log(ctx->avctx, AV_LOG_ERROR,
74			"Too many VLCs (%d) to be read.\n", num_codes_sum);
75			return AVERROR_INVALIDDATA;
76			}
77
78	✓✓	27476	for (j = 0; j < num_codes; j++) {
79		26037	symbols[count] = get_bits(gb, 8);
80		26037	bits[count] = i + 1;
81		26037	codes[count] = prefix++;
82
83		26037	count++;
84			}
85	✗✓	1439	if (prefix > (65535 - 256)/2) {
86			vlc->table = NULL;
87			return AVERROR_INVALIDDATA;
88			}
89
90		1439	prefix <<= 1;
91			}
92
93		106	return ff_init_vlc_sparse(vlc, VLC_BITS, count, bits, 1, 1,
94			codes, 2, 2, symbols, 1, 1, 0);
95			}
96
97			/*
98			* Unlike the RGB24 read/restore, which reads in a component at a time,
99			* ARGB read/restore reads in ARGB quads.
100			*/
101		4320	static int read_argb_line(CLLCContext ctx, GetBitContext gb, int *top_left,
102			VLC vlc, uint8_t outbuf)
103			{
104			uint8_t *dst;
105			int pred[4];
106			int code;
107			int i;
108
109		4320	OPEN_READER(bits, gb);
110
111		4320	dst = outbuf;
112		4320	pred[0] = top_left[0];
113		4320	pred[1] = top_left[1];
114		4320	pred[2] = top_left[2];
115		4320	pred[3] = top_left[3];
116
117	✓✓	5533920	for (i = 0; i < ctx->avctx->width; i++) {
118			/* Always get the alpha component */
119		5529600	UPDATE_CACHE(bits, gb);
120	✓✓	5529600	GET_VLC(code, bits, gb, vlc[0].table, VLC_BITS, VLC_DEPTH);
121
122		5529600	pred[0] += code;
123		5529600	dst[0] = pred[0];
124
125			/* Skip the components if they are entirely transparent */
126	✓✓	5529600	if (dst[0]) {
127			/* Red */
128		872412	UPDATE_CACHE(bits, gb);
129	✓✓	872412	GET_VLC(code, bits, gb, vlc[1].table, VLC_BITS, VLC_DEPTH);
130
131		872412	pred[1] += code;
132		872412	dst[1] = pred[1];
133
134			/* Green */
135		872412	UPDATE_CACHE(bits, gb);
136	✓✓	872412	GET_VLC(code, bits, gb, vlc[2].table, VLC_BITS, VLC_DEPTH);
137
138		872412	pred[2] += code;
139		872412	dst[2] = pred[2];
140
141			/* Blue */
142		872412	UPDATE_CACHE(bits, gb);
143	✓✓	872412	GET_VLC(code, bits, gb, vlc[3].table, VLC_BITS, VLC_DEPTH);
144
145		872412	pred[3] += code;
146		872412	dst[3] = pred[3];
147			} else {
148		4657188	dst[1] = 0;
149		4657188	dst[2] = 0;
150		4657188	dst[3] = 0;
151			}
152
153		5529600	dst += 4;
154			}
155
156		4320	CLOSE_READER(bits, gb);
157
158		4320	top_left[0] = outbuf[0];
159
160			/* Only stash components if they are not transparent */
161	✗✓	4320	if (top_left[0]) {
162			top_left[1] = outbuf[1];
163			top_left[2] = outbuf[2];
164			top_left[3] = outbuf[3];
165			}
166
167		4320	return 0;
168			}
169
170		23040	static int read_rgb24_component_line(CLLCContext ctx, GetBitContext gb,
171			int top_left, VLC vlc, uint8_t *outbuf)
172			{
173			uint8_t *dst;
174			int pred, code;
175			int i;
176
177		23040	OPEN_READER(bits, gb);
178
179		23040	dst = outbuf;
180		23040	pred = *top_left;
181
182			/* Simultaneously read and restore the line */
183	✓✓	14768640	for (i = 0; i < ctx->avctx->width; i++) {
184		14745600	UPDATE_CACHE(bits, gb);
185	✓✓	14745600	GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);
186
187		14745600	pred += code;
188		14745600	dst[0] = pred;
189		14745600	dst += 3;
190			}
191
192		23040	CLOSE_READER(bits, gb);
193
194			/* Stash the first pixel */
195		23040	*top_left = outbuf[0];
196
197		23040	return 0;
198			}
199
200		24480	static int read_yuv_component_line(CLLCContext ctx, GetBitContext gb,
201			int top_left, VLC vlc, uint8_t *outbuf,
202			int is_chroma)
203			{
204			int pred, code;
205			int i;
206
207		24480	OPEN_READER(bits, gb);
208
209		24480	pred = *top_left;
210
211			/* Simultaneously read and restore the line */
212	✓✓	10469280	for (i = 0; i < ctx->avctx->width >> is_chroma; i++) {
213		10444800	UPDATE_CACHE(bits, gb);
214	✓✓	10444800	GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);
215
216		10444800	pred += code;
217		10444800	outbuf[i] = pred;
218			}
219
220		24480	CLOSE_READER(bits, gb);
221
222			/* Stash the first pixel */
223		24480	*top_left = outbuf[0];
224
225		24480	return 0;
226			}
227
228		6	static int decode_argb_frame(CLLCContext ctx, GetBitContext gb, AVFrame *pic)
229			{
230		6	AVCodecContext *avctx = ctx->avctx;
231			uint8_t *dst;
232			int pred[4];
233			int ret;
234			int i, j;
235			VLC vlc[4];
236
237		6	pred[0] = 0;
238		6	pred[1] = 0x80;
239		6	pred[2] = 0x80;
240		6	pred[3] = 0x80;
241
242		6	dst = pic->data[0];
243
244		6	skip_bits(gb, 16);
245
246			/* Read in code table for each plane */
247	✓✓	30	for (i = 0; i < 4; i++) {
248		24	ret = read_code_table(ctx, gb, &vlc[i]);
249	✗✓	24	if (ret < 0) {
250			for (j = 0; j <= i; j++)
251			ff_free_vlc(&vlc[j]);
252
253			av_log(ctx->avctx, AV_LOG_ERROR,
254			"Could not read code table %d.\n", i);
255			return ret;
256			}
257			}
258
259			/* Read in and restore every line */
260	✓✓	4326	for (i = 0; i < avctx->height; i++) {
261		4320	read_argb_line(ctx, gb, pred, vlc, dst);
262
263		4320	dst += pic->linesize[0];
264			}
265
266	✓✓	30	for (i = 0; i < 4; i++)
267		24	ff_free_vlc(&vlc[i]);
268
269		6	return 0;
270			}
271
272		16	static int decode_rgb24_frame(CLLCContext ctx, GetBitContext gb, AVFrame *pic)
273			{
274		16	AVCodecContext *avctx = ctx->avctx;
275			uint8_t *dst;
276			int pred[3];
277			int ret;
278			int i, j;
279			VLC vlc[3];
280
281		16	pred[0] = 0x80;
282		16	pred[1] = 0x80;
283		16	pred[2] = 0x80;
284
285		16	dst = pic->data[0];
286
287		16	skip_bits(gb, 16);
288
289			/* Read in code table for each plane */
290	✓✓	64	for (i = 0; i < 3; i++) {
291		48	ret = read_code_table(ctx, gb, &vlc[i]);
292	✗✓	48	if (ret < 0) {
293			for (j = 0; j <= i; j++)
294			ff_free_vlc(&vlc[j]);
295
296			av_log(ctx->avctx, AV_LOG_ERROR,
297			"Could not read code table %d.\n", i);
298			return ret;
299			}
300			}
301
302			/* Read in and restore every line */
303	✓✓	7696	for (i = 0; i < avctx->height; i++) {
304	✓✓	30720	for (j = 0; j < 3; j++)
305		23040	read_rgb24_component_line(ctx, gb, &pred[j], &vlc[j], &dst[j]);
306
307		7680	dst += pic->linesize[0];
308			}
309
310	✓✓	64	for (i = 0; i < 3; i++)
311		48	ff_free_vlc(&vlc[i]);
312
313		16	return 0;
314			}
315
316		17	static int decode_yuv_frame(CLLCContext ctx, GetBitContext gb, AVFrame *pic)
317			{
318		17	AVCodecContext *avctx = ctx->avctx;
319			uint8_t block;
320			uint8_t *dst[3];
321			int pred[3];
322			int ret;
323			int i, j;
324			VLC vlc[2];
325
326		17	pred[0] = 0x80;
327		17	pred[1] = 0x80;
328		17	pred[2] = 0x80;
329
330		17	dst[0] = pic->data[0];
331		17	dst[1] = pic->data[1];
332		17	dst[2] = pic->data[2];
333
334		17	skip_bits(gb, 8);
335
336		17	block = get_bits(gb, 8);
337	✗✓	17	if (block) {
338			avpriv_request_sample(ctx->avctx, "Blocked YUV");
339			return AVERROR_PATCHWELCOME;
340			}
341
342			/* Read in code table for luma and chroma */
343	✓✓	51	for (i = 0; i < 2; i++) {
344		34	ret = read_code_table(ctx, gb, &vlc[i]);
345	✗✓	34	if (ret < 0) {
346			for (j = 0; j <= i; j++)
347			ff_free_vlc(&vlc[j]);
348
349			av_log(ctx->avctx, AV_LOG_ERROR,
350			"Could not read code table %d.\n", i);
351			return ret;
352			}
353			}
354
355			/* Read in and restore every line */
356	✓✓	8177	for (i = 0; i < avctx->height; i++) {
357		8160	read_yuv_component_line(ctx, gb, &pred[0], &vlc[0], dst[0], 0); /* Y */
358		8160	read_yuv_component_line(ctx, gb, &pred[1], &vlc[1], dst[1], 1); /* U */
359		8160	read_yuv_component_line(ctx, gb, &pred[2], &vlc[1], dst[2], 1); /* V */
360
361	✓✓	32640	for (j = 0; j < 3; j++)
362		24480	dst[j] += pic->linesize[j];
363			}
364
365	✓✓	51	for (i = 0; i < 2; i++)
366		34	ff_free_vlc(&vlc[i]);
367
368		17	return 0;
369			}
370
371		39	static int cllc_decode_frame(AVCodecContext avctx, void data,
372			int got_picture_ptr, AVPacket avpkt)
373			{
374		39	CLLCContext *ctx = avctx->priv_data;
375		39	AVFrame *pic = data;
376		39	ThreadFrame frame = { .f = data };
377		39	uint8_t *src = avpkt->data;
378			uint32_t info_tag, info_offset;
379			int data_size;
380			GetBitContext gb;
381			int coding_type, ret;
382
383	✗✓	39	if (avpkt->size < 4 + 4) {
384			av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size);
385			return AVERROR_INVALIDDATA;
386			}
387
388		39	info_offset = 0;
389		39	info_tag = AV_RL32(src);
390	✓✗	39	if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
391		39	info_offset = AV_RL32(src + 4);
392	✓✗✗✓	39	if (info_offset > UINT32_MAX - 8 \|\| info_offset + 8 > avpkt->size) {
393			av_log(avctx, AV_LOG_ERROR,
394			"Invalid INFO header offset: 0x%08"PRIX32" is too large.\n",
395			info_offset);
396			return AVERROR_INVALIDDATA;
397			}
398		39	ff_canopus_parse_info_tag(avctx, src + 8, info_offset);
399
400		39	info_offset += 8;
401		39	src += info_offset;
402			}
403
404		39	data_size = (avpkt->size - info_offset) & ~1;
405
406			/* Make sure our bswap16'd buffer is big enough */
407		39	av_fast_padded_malloc(&ctx->swapped_buf,
408		39	&ctx->swapped_buf_size, data_size);
409	✗✓	39	if (!ctx->swapped_buf) {
410			av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n");
411			return AVERROR(ENOMEM);
412			}
413
414			/* bswap16 the buffer since CLLC's bitreader works in 16-bit words */
415		39	ctx->bdsp.bswap16_buf((uint16_t ) ctx->swapped_buf, (uint16_t ) src,
416			data_size / 2);
417
418	✗✓	39	if ((ret = init_get_bits8(&gb, ctx->swapped_buf, data_size)) < 0)
419			return ret;
420
421			/*
422			* Read in coding type. The types are as follows:
423			*
424			* 0 - YUY2
425			* 1 - BGR24 (Triples)
426			* 2 - BGR24 (Quads)
427			* 3 - BGRA
428			*/
429		39	coding_type = (AV_RL32(src) >> 8) & 0xFF;
430		39	av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type);
431
432	✗✓	39	if(get_bits_left(&gb) < avctx->height * avctx->width)
433			return AVERROR_INVALIDDATA;
434
435	✓✓✓✗	39	switch (coding_type) {
436		17	case 0:
437		17	avctx->pix_fmt = AV_PIX_FMT_YUV422P;
438		17	avctx->bits_per_raw_sample = 8;
439
440	✗✓	17	if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
441			return ret;
442
443		17	ret = decode_yuv_frame(ctx, &gb, pic);
444	✗✓	17	if (ret < 0)
445			return ret;
446
447		17	break;
448		16	case 1:
449			case 2:
450		16	avctx->pix_fmt = AV_PIX_FMT_RGB24;
451		16	avctx->bits_per_raw_sample = 8;
452
453	✗✓	16	if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
454			return ret;
455
456		16	ret = decode_rgb24_frame(ctx, &gb, pic);
457	✗✓	16	if (ret < 0)
458			return ret;
459
460		16	break;
461		6	case 3:
462		6	avctx->pix_fmt = AV_PIX_FMT_ARGB;
463		6	avctx->bits_per_raw_sample = 8;
464
465	✗✓	6	if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
466			return ret;
467
468		6	ret = decode_argb_frame(ctx, &gb, pic);
469	✗✓	6	if (ret < 0)
470			return ret;
471
472		6	break;
473			default:
474			av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type);
475			return AVERROR_INVALIDDATA;
476			}
477
478		39	pic->key_frame = 1;
479		39	pic->pict_type = AV_PICTURE_TYPE_I;
480
481		39	*got_picture_ptr = 1;
482
483		39	return avpkt->size;
484			}
485
486		6	static av_cold int cllc_decode_close(AVCodecContext *avctx)
487			{
488		6	CLLCContext *ctx = avctx->priv_data;
489
490		6	av_freep(&ctx->swapped_buf);
491
492		6	return 0;
493			}
494
495		6	static av_cold int cllc_decode_init(AVCodecContext *avctx)
496			{
497		6	CLLCContext *ctx = avctx->priv_data;
498
499			/* Initialize various context values */
500		6	ctx->avctx = avctx;
501		6	ctx->swapped_buf = NULL;
502		6	ctx->swapped_buf_size = 0;
503
504		6	ff_bswapdsp_init(&ctx->bdsp);
505
506		6	return 0;
507			}
508
509			AVCodec ff_cllc_decoder = {
510			.name = "cllc",
511			.long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
512			.type = AVMEDIA_TYPE_VIDEO,
513			.id = AV_CODEC_ID_CLLC,
514			.priv_data_size = sizeof(CLLCContext),
515			.init = cllc_decode_init,
516			.decode = cllc_decode_frame,
517			.close = cllc_decode_close,
518			.capabilities = AV_CODEC_CAP_DR1 \| AV_CODEC_CAP_FRAME_THREADS,
519			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
520			};