FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/cllc.c	Lines:	189	227	83.3 %
Date:	2021-04-18 10:33:33	Branches:	69	96	71.9 %


/*
 * 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];
    int num_lens, num_codes, num_codes_sum;
    int i, j, count;

    count         = 0;
    num_codes_sum = 0;

    num_lens = get_bits(gb, 5);

    if (num_lens > VLC_BITS * VLC_DEPTH) {
        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) {
            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;

            count++;
        }
    }

    return ff_init_vlc_from_lengths(vlc, VLC_BITS, count, bits, 1,
                                    symbols, 1, 1, 0, 0, ctx->avctx);
}

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