/src/ffmpeg/libavcodec/cdxl.c

Source
/*
 * CDXL video decoder
 * Copyright (c) 2011-2012 Paul B Mahol
 *
 * 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
 * Commodore CDXL video decoder
 * @author Paul B Mahol
 */

#define UNCHECKED_BITSTREAM_READER 1

#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"

#define BIT_PLANAR   0x00
#define CHUNKY       0x20
#define BYTE_PLANAR  0x40
#define BIT_LINE     0x80
#define BYTE_LINE    0xC0

typedef struct CDXLVideoContext {
    AVCodecContext *avctx;
    int            bpp;
    int            type;
    int            format;
    int            padded_bits;
    const uint8_t  *palette;
    int            palette_size;
    const uint8_t  *video;
    int            video_size;
    uint8_t        *new_video;
    int            new_video_size;
} CDXLVideoContext;

static av_cold int cdxl_decode_init(AVCodecContext *avctx)
{
    CDXLVideoContext *c = avctx->priv_data;

    c->new_video_size = 0;
    c->avctx          = avctx;

    return 0;
}

static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
{
    if (c->type == 1) {
        for (int i = 0; i < c->palette_size / 2; i++) {
            unsigned rgb = AV_RB16(&c->palette[i * 2]);
            unsigned r   = ((rgb >> 8) & 0xF) * 0x11;
            unsigned g   = ((rgb >> 4) & 0xF) * 0x11;
            unsigned b   =  (rgb       & 0xF) * 0x11;
            AV_WN32(&new_palette[i], (0xFFU << 24) | (r << 16) | (g << 8) | b);
        }
    } else {
        for (int i = 0; i < c->palette_size / 3; i++) {
            unsigned rgb = AV_RB24(&c->palette[i * 3]);
            AV_WN32(&new_palette[i], (0xFFU << 24) | rgb);
        }
    }
}

static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
{
    GetBitContext gb;
    int x, y, plane;

    if (init_get_bits8(&gb, c->video, c->video_size) < 0)
        return;
    for (plane = 0; plane < c->bpp; plane++) {
        for (y = 0; y < c->avctx->height; y++) {
            for (x = 0; x < c->avctx->width; x++)
                out[linesize * y + x] |= get_bits1(&gb) << plane;
            skip_bits(&gb, c->padded_bits);
        }
    }
}

static void bitline2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
{
    GetBitContext  gb;
    int x, y, plane;

    if (init_get_bits8(&gb, c->video, c->video_size) < 0)
        return;
    for (y = 0; y < c->avctx->height; y++) {
        for (plane = 0; plane < c->bpp; plane++) {
            for (x = 0; x < c->avctx->width; x++)
                out[linesize * y + x] |= get_bits1(&gb) << plane;
            skip_bits(&gb, c->padded_bits);
        }
    }
}

static void chunky2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
{
    GetByteContext gb;
    int y;

    bytestream2_init(&gb, c->video, c->video_size);
    for (y = 0; y < c->avctx->height; y++) {
        bytestream2_get_buffer(&gb, out + linesize * y, c->avctx->width * 3);
    }
}

static void import_format(CDXLVideoContext *c, ptrdiff_t linesize, uint8_t *out)
{
    for (int y = 0; y < c->avctx->height; y++)
        memset(out + y * linesize, 0, c->avctx->width);

    switch (c->format) {
    case BIT_PLANAR:
        bitplanar2chunky(c, linesize, out);
        break;
    case BIT_LINE:
        bitline2chunky(c, linesize, out);
        break;
    case CHUNKY:
        chunky2chunky(c, linesize, out);
        break;
    }
}

static void cdxl_decode_rgb(CDXLVideoContext *c, AVFrame *frame)
{
    uint32_t *new_palette = (uint32_t *)frame->data[1];

    memset(frame->data[1], 0, AVPALETTE_SIZE);
    import_palette(c, new_palette);
    import_format(c, frame->linesize[0], frame->data[0]);
}

static void cdxl_decode_raw(CDXLVideoContext *c, AVFrame *frame)
{
    import_format(c, frame->linesize[0], frame->data[0]);
}

static void cdxl_decode_ham6(CDXLVideoContext *c, AVFrame *frame)
{
    AVCodecContext *avctx = c->avctx;
    uint32_t new_palette[16], r, g, b;
    uint8_t *ptr, *out, index, op;
    int x, y;

    ptr = c->new_video;
    out = frame->data[0];

    import_palette(c, new_palette);
    import_format(c, avctx->width, c->new_video);

    for (y = 0; y < avctx->height; y++) {
        r = new_palette[0] & 0xFF0000;
        g = new_palette[0] & 0xFF00;
        b = new_palette[0] & 0xFF;
        for (x = 0; x < avctx->width; x++) {
            index  = *ptr++;
            op     = index >> 4;
            index &= 15;
            switch (op) {
            case 0:
                r = new_palette[index] & 0xFF0000;
                g = new_palette[index] & 0xFF00;
                b = new_palette[index] & 0xFF;
                break;
            case 1:
                b = index * 0x11;
                break;
            case 2:
                r = index * 0x11 << 16;
                break;
            case 3:
                g = index * 0x11 << 8;
                break;
            }
            AV_WL24(out + x * 3, r | g | b);
        }
        out += frame->linesize[0];
    }
}

static void cdxl_decode_ham8(CDXLVideoContext *c, AVFrame *frame)
{
    AVCodecContext *avctx = c->avctx;
    uint32_t new_palette[64], r, g, b;
    uint8_t *ptr, *out, index, op;
    int x, y;

    ptr = c->new_video;
    out = frame->data[0];

    import_palette(c, new_palette);
    import_format(c, avctx->width, c->new_video);

    for (y = 0; y < avctx->height; y++) {
        r = new_palette[0] & 0xFF0000;
        g = new_palette[0] & 0xFF00;
        b = new_palette[0] & 0xFF;
        for (x = 0; x < avctx->width; x++) {
            index  = *ptr++;
            op     = index >> 6;
            index &= 63;
            switch (op) {
            case 0:
                r = new_palette[index] & 0xFF0000;
                g = new_palette[index] & 0xFF00;
                b = new_palette[index] & 0xFF;
                break;
            case 1:
                b = (index <<  2) | (b & 3);
                break;
            case 2:
                r = (index << 18) | (r & (3 << 16));
                break;
            case 3:
                g = (index << 10) | (g & (3 << 8));
                break;
            }
            AV_WL24(out + x * 3, r | g | b);
        }
        out += frame->linesize[0];
    }
}

static int cdxl_decode_frame(AVCodecContext *avctx, AVFrame *p,
                             int *got_frame, AVPacket *pkt)
{
    CDXLVideoContext *c = avctx->priv_data;
    int ret, w, h, encoding, aligned_width, buf_size = pkt->size;
    const uint8_t *buf = pkt->data;

    if (buf_size < 32)
        return AVERROR_INVALIDDATA;
    c->type         = buf[0];
    encoding        = buf[1] & 7;
    c->format       = buf[1] & 0xE0;
    w               = AV_RB16(&buf[14]);
    h               = AV_RB16(&buf[16]);
    c->bpp          = buf[19];
    c->palette_size = AV_RB16(&buf[20]);
    c->palette      = buf + 32;
    c->video        = c->palette + c->palette_size;
    c->video_size   = buf_size - c->palette_size - 32;

    if (c->type > 1)
        return AVERROR_INVALIDDATA;
    if (c->type == 1 && c->palette_size > 512)
        return AVERROR_INVALIDDATA;
    if (c->type == 0 && c->palette_size > 768)
        return AVERROR_INVALIDDATA;
    if (buf_size < c->palette_size + 32)
        return AVERROR_INVALIDDATA;
    if (c->bpp < 1)
        return AVERROR_INVALIDDATA;
    if (c->format != BIT_PLANAR && c->format != BIT_LINE && c->format != CHUNKY) {
        avpriv_request_sample(avctx, "Pixel format 0x%0x", c->format);
        return AVERROR_PATCHWELCOME;
    }

    if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
        return ret;

    if (c->format == CHUNKY)
        aligned_width = avctx->width;
    else
        aligned_width = FFALIGN(c->avctx->width, 16);
    c->padded_bits  = aligned_width - c->avctx->width;
    if (c->video_size < aligned_width * avctx->height * (int64_t)c->bpp / 8)
        return AVERROR_INVALIDDATA;
    if (!encoding && c->palette_size && c->bpp <= 8 && c->format != CHUNKY) {
        avctx->pix_fmt = AV_PIX_FMT_PAL8;
    } else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8) && c->format != CHUNKY) {
        if (c->palette_size != (1 << (c->bpp - 1)))
            return AVERROR_INVALIDDATA;
        avctx->pix_fmt = AV_PIX_FMT_BGR24;
    } else if (!encoding && c->bpp == 24 && c->format == CHUNKY &&
               !c->palette_size) {
        avctx->pix_fmt = AV_PIX_FMT_RGB24;
    } else {
        avpriv_request_sample(avctx, "Encoding %d, bpp %d and format 0x%x",
                              encoding, c->bpp, c->format);
        return AVERROR_PATCHWELCOME;
    }

    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
        return ret;

    if (encoding) {
        av_fast_padded_malloc(&c->new_video, &c->new_video_size,
                              h * w + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!c->new_video)
            return AVERROR(ENOMEM);
        if (c->bpp == 8)
            cdxl_decode_ham8(c, p);
        else
            cdxl_decode_ham6(c, p);
    } else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
        cdxl_decode_rgb(c, p);
    } else {
        cdxl_decode_raw(c, p);
    }
    *got_frame = 1;

    return buf_size;
}

static av_cold int cdxl_decode_end(AVCodecContext *avctx)
{
    CDXLVideoContext *c = avctx->priv_data;

    av_freep(&c->new_video);

    return 0;
}

const FFCodec ff_cdxl_decoder = {
    .p.name         = "cdxl",
    CODEC_LONG_NAME("Commodore CDXL video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_CDXL,
    .priv_data_size = sizeof(CDXLVideoContext),
    .init           = cdxl_decode_init,
    .close          = cdxl_decode_end,
    FF_CODEC_DECODE_CB(cdxl_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
};

Coverage Report

Created: 2026-04-01 07:42

Line	Count	Source
1		/*
2		* CDXL video decoder
3		* Copyright (c) 2011-2012 Paul B Mahol
4		*
5		* This file is part of FFmpeg.
6		*
7		* FFmpeg is free software; you can redistribute it and/or
8		* modify it under the terms of the GNU Lesser General Public
9		* License as published by the Free Software Foundation; either
10		* version 2.1 of the License, or (at your option) any later version.
11		*
12		* FFmpeg is distributed in the hope that it will be useful,
13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15		* Lesser General Public License for more details.
16		*
17		* You should have received a copy of the GNU Lesser General Public
18		* License along with FFmpeg; if not, write to the Free Software
19		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20		*/
21
22		/**
23		* @file
24		* Commodore CDXL video decoder
25		* @author Paul B Mahol
26		*/
27
28		#define UNCHECKED_BITSTREAM_READER 1
29
30		#include "libavutil/intreadwrite.h"
31		#include "libavutil/mem.h"
32		#include "avcodec.h"
33		#include "bytestream.h"
34		#include "codec_internal.h"
35		#include "decode.h"
36		#include "get_bits.h"
37
38	403k	#define BIT_PLANAR 0x00
39	280k	#define CHUNKY 0x20
40		#define BYTE_PLANAR 0x40
41	151k	#define BIT_LINE 0x80
42		#define BYTE_LINE 0xC0
43
44		typedef struct CDXLVideoContext {
45		AVCodecContext *avctx;
46		int bpp;
47		int type;
48		int format;
49		int padded_bits;
50		const uint8_t *palette;
51		int palette_size;
52		const uint8_t *video;
53		int video_size;
54		uint8_t *new_video;
55		int new_video_size;
56		} CDXLVideoContext;
57
58		static av_cold int cdxl_decode_init(AVCodecContext *avctx)
59	1.63k	{
60	1.63k	CDXLVideoContext *c = avctx->priv_data;
61
62	1.63k	c->new_video_size = 0;
63	1.63k	c->avctx = avctx;
64
65	1.63k	return 0;
66	1.63k	}
67
68		static void import_palette(CDXLVideoContext c, uint32_t new_palette)
69	131k	{
70	131k	if (c->type == 1) {
71	94.4k	for (int i = 0; i < c->palette_size / 2; i++) {
72	83.4k	unsigned rgb = AV_RB16(&c->palette[i * 2]);
73	83.4k	unsigned r = ((rgb >> 8) & 0xF) * 0x11;
74	83.4k	unsigned g = ((rgb >> 4) & 0xF) * 0x11;
75	83.4k	unsigned b = (rgb & 0xF) * 0x11;
76	83.4k	AV_WN32(&new_palette[i], (0xFFU << 24) \| (r << 16) \| (g << 8) \| b);
77	83.4k	}
78	120k	} else {
79	149k	for (int i = 0; i < c->palette_size / 3; i++) {
80	29.1k	unsigned rgb = AV_RB24(&c->palette[i * 3]);
81	29.1k	AV_WN32(&new_palette[i], (0xFFU << 24) \| rgb);
82	29.1k	}
83	120k	}
84	131k	}
85
86		static void bitplanar2chunky(CDXLVideoContext c, int linesize, uint8_t out)
87	127k	{
88	127k	GetBitContext gb;
89	127k	int x, y, plane;
90
91	127k	if (init_get_bits8(&gb, c->video, c->video_size) < 0)
92	0	return;
93	268k	for (plane = 0; plane < c->bpp; plane++) {
94	1.17M	for (y = 0; y < c->avctx->height; y++) {
95	30.9M	for (x = 0; x < c->avctx->width; x++)
96	29.9M	out[linesize * y + x] \|= get_bits1(&gb) << plane;
97	1.03M	skip_bits(&gb, c->padded_bits);
98	1.03M	}
99	141k	}
100	127k	}
101
102		static void bitline2chunky(CDXLVideoContext c, int linesize, uint8_t out)
103	4.41k	{
104	4.41k	GetBitContext gb;
105	4.41k	int x, y, plane;
106
107	4.41k	if (init_get_bits8(&gb, c->video, c->video_size) < 0)
108	0	return;
109	163k	for (y = 0; y < c->avctx->height; y++) {
110	324k	for (plane = 0; plane < c->bpp; plane++) {
111	3.59M	for (x = 0; x < c->avctx->width; x++)
112	3.43M	out[linesize * y + x] \|= get_bits1(&gb) << plane;
113	165k	skip_bits(&gb, c->padded_bits);
114	165k	}
115	158k	}
116	4.41k	}
117
118		static void chunky2chunky(CDXLVideoContext c, int linesize, uint8_t out)
119	1.81k	{
120	1.81k	GetByteContext gb;
121	1.81k	int y;
122
123	1.81k	bytestream2_init(&gb, c->video, c->video_size);
124	7.54k	for (y = 0; y < c->avctx->height; y++) {
125	5.73k	bytestream2_get_buffer(&gb, out + linesize * y, c->avctx->width * 3);
126	5.73k	}
127	1.81k	}
128
129		static void import_format(CDXLVideoContext c, ptrdiff_t linesize, uint8_t out)
130	133k	{
131	1.08M	for (int y = 0; y < c->avctx->height; y++)
132	948k	memset(out + y * linesize, 0, c->avctx->width);
133
134	133k	switch (c->format) {
135	127k	case BIT_PLANAR:
136	127k	bitplanar2chunky(c, linesize, out);
137	127k	break;
138	4.41k	case BIT_LINE:
139	4.41k	bitline2chunky(c, linesize, out);
140	4.41k	break;
141	1.81k	case CHUNKY:
142	1.81k	chunky2chunky(c, linesize, out);
143	1.81k	break;
144	133k	}
145	133k	}
146
147		static void cdxl_decode_rgb(CDXLVideoContext c, AVFrame frame)
148	128k	{
149	128k	uint32_t new_palette = (uint32_t )frame->data[1];
150
151	128k	memset(frame->data[1], 0, AVPALETTE_SIZE);
152	128k	import_palette(c, new_palette);
153	128k	import_format(c, frame->linesize[0], frame->data[0]);
154	128k	}
155
156		static void cdxl_decode_raw(CDXLVideoContext c, AVFrame frame)
157	1.81k	{
158	1.81k	import_format(c, frame->linesize[0], frame->data[0]);
159	1.81k	}
160
161		static void cdxl_decode_ham6(CDXLVideoContext c, AVFrame frame)
162	1.96k	{
163	1.96k	AVCodecContext *avctx = c->avctx;
164	1.96k	uint32_t new_palette[16], r, g, b;
165	1.96k	uint8_t ptr, out, index, op;
166	1.96k	int x, y;
167
168	1.96k	ptr = c->new_video;
169	1.96k	out = frame->data[0];
170
171	1.96k	import_palette(c, new_palette);
172	1.96k	import_format(c, avctx->width, c->new_video);
173
174	49.8k	for (y = 0; y < avctx->height; y++) {
175	47.8k	r = new_palette[0] & 0xFF0000;
176	47.8k	g = new_palette[0] & 0xFF00;
177	47.8k	b = new_palette[0] & 0xFF;
178	2.97M	for (x = 0; x < avctx->width; x++) {
179	2.92M	index = *ptr++;
180	2.92M	op = index >> 4;
181	2.92M	index &= 15;
182	2.92M	switch (op) {
183	2.60M	case 0:
184	2.60M	r = new_palette[index] & 0xFF0000;
185	2.60M	g = new_palette[index] & 0xFF00;
186	2.60M	b = new_palette[index] & 0xFF;
187	2.60M	break;
188	115k	case 1:
189	115k	b = index * 0x11;
190	115k	break;
191	99.8k	case 2:
192	99.8k	r = index * 0x11 << 16;
193	99.8k	break;
194	103k	case 3:
195	103k	g = index * 0x11 << 8;
196	103k	break;
197	2.92M	}
198	2.92M	AV_WL24(out + x * 3, r \| g \| b);
199	2.92M	}
200	47.8k	out += frame->linesize[0];
201	47.8k	}
202	1.96k	}
203
204		static void cdxl_decode_ham8(CDXLVideoContext c, AVFrame frame)
205	1.46k	{
206	1.46k	AVCodecContext *avctx = c->avctx;
207	1.46k	uint32_t new_palette[64], r, g, b;
208	1.46k	uint8_t ptr, out, index, op;
209	1.46k	int x, y;
210
211	1.46k	ptr = c->new_video;
212	1.46k	out = frame->data[0];
213
214	1.46k	import_palette(c, new_palette);
215	1.46k	import_format(c, avctx->width, c->new_video);
216
217	3.32k	for (y = 0; y < avctx->height; y++) {
218	1.86k	r = new_palette[0] & 0xFF0000;
219	1.86k	g = new_palette[0] & 0xFF00;
220	1.86k	b = new_palette[0] & 0xFF;
221	832k	for (x = 0; x < avctx->width; x++) {
222	831k	index = *ptr++;
223	831k	op = index >> 6;
224	831k	index &= 63;
225	831k	switch (op) {
226	627k	case 0:
227	627k	r = new_palette[index] & 0xFF0000;
228	627k	g = new_palette[index] & 0xFF00;
229	627k	b = new_palette[index] & 0xFF;
230	627k	break;
231	90.2k	case 1:
232	90.2k	b = (index << 2) \| (b & 3);
233	90.2k	break;
234	89.4k	case 2:
235	89.4k	r = (index << 18) \| (r & (3 << 16));
236	89.4k	break;
237	23.9k	case 3:
238	23.9k	g = (index << 10) \| (g & (3 << 8));
239	23.9k	break;
240	831k	}
241	831k	AV_WL24(out + x * 3, r \| g \| b);
242	831k	}
243	1.86k	out += frame->linesize[0];
244	1.86k	}
245	1.46k	}
246
247		static int cdxl_decode_frame(AVCodecContext avctx, AVFrame p,
248		int got_frame, AVPacket pkt)
249	251k	{
250	251k	CDXLVideoContext *c = avctx->priv_data;
251	251k	int ret, w, h, encoding, aligned_width, buf_size = pkt->size;
252	251k	const uint8_t *buf = pkt->data;
253
254	251k	if (buf_size < 32)
255	109k	return AVERROR_INVALIDDATA;
256	142k	c->type = buf[0];
257	142k	encoding = buf[1] & 7;
258	142k	c->format = buf[1] & 0xE0;
259	142k	w = AV_RB16(&buf[14]);
260	142k	h = AV_RB16(&buf[16]);
261	142k	c->bpp = buf[19];
262	142k	c->palette_size = AV_RB16(&buf[20]);
263	142k	c->palette = buf + 32;
264	142k	c->video = c->palette + c->palette_size;
265	142k	c->video_size = buf_size - c->palette_size - 32;
266
267	142k	if (c->type > 1)
268	2.48k	return AVERROR_INVALIDDATA;
269	139k	if (c->type == 1 && c->palette_size > 512)
270	404	return AVERROR_INVALIDDATA;
271	139k	if (c->type == 0 && c->palette_size > 768)
272	449	return AVERROR_INVALIDDATA;
273	138k	if (buf_size < c->palette_size + 32)
274	408	return AVERROR_INVALIDDATA;
275	138k	if (c->bpp < 1)
276	432	return AVERROR_INVALIDDATA;
277	137k	if (c->format != BIT_PLANAR && c->format != BIT_LINE && c->format != CHUNKY) {
278	245	avpriv_request_sample(avctx, "Pixel format 0x%0x", c->format);
279	245	return AVERROR_PATCHWELCOME;
280	245	}
281
282	137k	if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
283	1.29k	return ret;
284
285	136k	if (c->format == CHUNKY)
286	3.32k	aligned_width = avctx->width;
287	133k	else
288	133k	aligned_width = FFALIGN(c->avctx->width, 16);
289	136k	c->padded_bits = aligned_width - c->avctx->width;
290	136k	if (c->video_size < aligned_width * avctx->height * (int64_t)c->bpp / 8)
291	545	return AVERROR_INVALIDDATA;
292	135k	if (!encoding && c->palette_size && c->bpp <= 8 && c->format != CHUNKY) {
293	128k	avctx->pix_fmt = AV_PIX_FMT_PAL8;
294	128k	} else if (encoding == 1 && (c->bpp == 6 \|\| c->bpp == 8) && c->format != CHUNKY) {
295	3.76k	if (c->palette_size != (1 << (c->bpp - 1)))
296	342	return AVERROR_INVALIDDATA;
297	3.42k	avctx->pix_fmt = AV_PIX_FMT_BGR24;
298	3.68k	} else if (!encoding && c->bpp == 24 && c->format == CHUNKY &&
299	2.02k	!c->palette_size) {
300	1.81k	avctx->pix_fmt = AV_PIX_FMT_RGB24;
301	1.86k	} else {
302	1.86k	avpriv_request_sample(avctx, "Encoding %d, bpp %d and format 0x%x",
303	1.86k	encoding, c->bpp, c->format);
304	1.86k	return AVERROR_PATCHWELCOME;
305	1.86k	}
306
307	133k	if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
308	0	return ret;
309
310	133k	if (encoding) {
311	3.42k	av_fast_padded_malloc(&c->new_video, &c->new_video_size,
312	3.42k	h * w + AV_INPUT_BUFFER_PADDING_SIZE);
313	3.42k	if (!c->new_video)
314	0	return AVERROR(ENOMEM);
315	3.42k	if (c->bpp == 8)
316	1.46k	cdxl_decode_ham8(c, p);
317	1.96k	else
318	1.96k	cdxl_decode_ham6(c, p);
319	130k	} else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
320	128k	cdxl_decode_rgb(c, p);
321	128k	} else {
322	1.81k	cdxl_decode_raw(c, p);
323	1.81k	}
324	133k	*got_frame = 1;
325
326	133k	return buf_size;
327	133k	}
328
329		static av_cold int cdxl_decode_end(AVCodecContext *avctx)
330	1.63k	{
331	1.63k	CDXLVideoContext *c = avctx->priv_data;
332
333	1.63k	av_freep(&c->new_video);
334
335	1.63k	return 0;
336	1.63k	}
337
338		const FFCodec ff_cdxl_decoder = {
339		.p.name = "cdxl",
340		CODEC_LONG_NAME("Commodore CDXL video"),
341		.p.type = AVMEDIA_TYPE_VIDEO,
342		.p.id = AV_CODEC_ID_CDXL,
343		.priv_data_size = sizeof(CDXLVideoContext),
344		.init = cdxl_decode_init,
345		.close = cdxl_decode_end,
346		FF_CODEC_DECODE_CB(cdxl_decode_frame),
347		.p.capabilities = AV_CODEC_CAP_DR1,
348		};