/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: 2026-01-16 07:48

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	371k	#define BIT_PLANAR 0x00
39	258k	#define CHUNKY 0x20
40		#define BYTE_PLANAR 0x40
41	140k	#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	1.64k	{
60	1.64k	CDXLVideoContext *c = avctx->priv_data;
61
62	1.64k	c->new_video_size = 0;
63	1.64k	c->avctx = avctx;
64
65	1.64k	return 0;
66	1.64k	}
67
68		static void import_palette(CDXLVideoContext c, uint32_t new_palette)
69	121k	{
70	121k	if (c->type == 1) {
71	88.8k	for (int i = 0; i < c->palette_size / 2; i++) {
72	78.3k	unsigned rgb = AV_RB16(&c->palette[i * 2]);
73	78.3k	unsigned r = ((rgb >> 8) & 0xF) * 0x11;
74	78.3k	unsigned g = ((rgb >> 4) & 0xF) * 0x11;
75	78.3k	unsigned b = (rgb & 0xF) * 0x11;
76	78.3k	AV_WN32(&new_palette[i], (0xFFU << 24) \| (r << 16) \| (g << 8) \| b);
77	78.3k	}
78	111k	} else {
79	140k	for (int i = 0; i < c->palette_size / 3; i++) {
80	29.7k	unsigned rgb = AV_RB24(&c->palette[i * 3]);
81	29.7k	AV_WN32(&new_palette[i], (0xFFU << 24) \| rgb);
82	29.7k	}
83	111k	}
84	121k	}
85
86		static void bitplanar2chunky(CDXLVideoContext c, int linesize, uint8_t out)
87	117k	{
88	117k	GetBitContext gb;
89	117k	int x, y, plane;
90
91	117k	if (init_get_bits8(&gb, c->video, c->video_size) < 0)
92	0	return;
93	248k	for (plane = 0; plane < c->bpp; plane++) {
94	1.21M	for (y = 0; y < c->avctx->height; y++) {
95	34.1M	for (x = 0; x < c->avctx->width; x++)
96	33.1M	out[linesize * y + x] \|= get_bits1(&gb) << plane;
97	1.08M	skip_bits(&gb, c->padded_bits);
98	1.08M	}
99	131k	}
100	117k	}
101
102		static void bitline2chunky(CDXLVideoContext c, int linesize, uint8_t out)
103	4.42k	{
104	4.42k	GetBitContext gb;
105	4.42k	int x, y, plane;
106
107	4.42k	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	328k	for (plane = 0; plane < c->bpp; plane++) {
111	4.10M	for (x = 0; x < c->avctx->width; x++)
112	3.93M	out[linesize * y + x] \|= get_bits1(&gb) << plane;
113	168k	skip_bits(&gb, c->padded_bits);
114	168k	}
115	159k	}
116	4.42k	}
117
118		static void chunky2chunky(CDXLVideoContext c, int linesize, uint8_t out)
119	1.54k	{
120	1.54k	GetByteContext gb;
121	1.54k	int y;
122
123	1.54k	bytestream2_init(&gb, c->video, c->video_size);
124	8.55k	for (y = 0; y < c->avctx->height; y++) {
125	7.00k	bytestream2_get_buffer(&gb, out + linesize * y, c->avctx->width * 3);
126	7.00k	}
127	1.54k	}
128
129		static void import_format(CDXLVideoContext c, ptrdiff_t linesize, uint8_t out)
130	123k	{
131	1.08M	for (int y = 0; y < c->avctx->height; y++)
132	964k	memset(out + y * linesize, 0, c->avctx->width);
133
134	123k	switch (c->format) {
135	117k	case BIT_PLANAR:
136	117k	bitplanar2chunky(c, linesize, out);
137	117k	break;
138	4.42k	case BIT_LINE:
139	4.42k	bitline2chunky(c, linesize, out);
140	4.42k	break;
141	1.54k	case CHUNKY:
142	1.54k	chunky2chunky(c, linesize, out);
143	1.54k	break;
144	123k	}
145	123k	}
146
147		static void cdxl_decode_rgb(CDXLVideoContext c, AVFrame frame)
148	118k	{
149	118k	uint32_t new_palette = (uint32_t )frame->data[1];
150
151	118k	memset(frame->data[1], 0, AVPALETTE_SIZE);
152	118k	import_palette(c, new_palette);
153	118k	import_format(c, frame->linesize[0], frame->data[0]);
154	118k	}
155
156		static void cdxl_decode_raw(CDXLVideoContext c, AVFrame frame)
157	1.54k	{
158	1.54k	import_format(c, frame->linesize[0], frame->data[0]);
159	1.54k	}
160
161		static void cdxl_decode_ham6(CDXLVideoContext c, AVFrame frame)
162	1.99k	{
163	1.99k	AVCodecContext *avctx = c->avctx;
164	1.99k	uint32_t new_palette[16], r, g, b;
165	1.99k	uint8_t ptr, out, index, op;
166	1.99k	int x, y;
167
168	1.99k	ptr = c->new_video;
169	1.99k	out = frame->data[0];
170
171	1.99k	import_palette(c, new_palette);
172	1.99k	import_format(c, avctx->width, c->new_video);
173
174	57.8k	for (y = 0; y < avctx->height; y++) {
175	55.8k	r = new_palette[0] & 0xFF0000;
176	55.8k	g = new_palette[0] & 0xFF00;
177	55.8k	b = new_palette[0] & 0xFF;
178	3.74M	for (x = 0; x < avctx->width; x++) {
179	3.68M	index = *ptr++;
180	3.68M	op = index >> 4;
181	3.68M	index &= 15;
182	3.68M	switch (op) {
183	3.26M	case 0:
184	3.26M	r = new_palette[index] & 0xFF0000;
185	3.26M	g = new_palette[index] & 0xFF00;
186	3.26M	b = new_palette[index] & 0xFF;
187	3.26M	break;
188	153k	case 1:
189	153k	b = index * 0x11;
190	153k	break;
191	199k	case 2:
192	199k	r = index * 0x11 << 16;
193	199k	break;
194	71.3k	case 3:
195	71.3k	g = index * 0x11 << 8;
196	71.3k	break;
197	3.68M	}
198	3.68M	AV_WL24(out + x * 3, r \| g \| b);
199	3.68M	}
200	55.8k	out += frame->linesize[0];
201	55.8k	}
202	1.99k	}
203
204		static void cdxl_decode_ham8(CDXLVideoContext c, AVFrame frame)
205	1.39k	{
206	1.39k	AVCodecContext *avctx = c->avctx;
207	1.39k	uint32_t new_palette[64], r, g, b;
208	1.39k	uint8_t ptr, out, index, op;
209	1.39k	int x, y;
210
211	1.39k	ptr = c->new_video;
212	1.39k	out = frame->data[0];
213
214	1.39k	import_palette(c, new_palette);
215	1.39k	import_format(c, avctx->width, c->new_video);
216
217	3.86k	for (y = 0; y < avctx->height; y++) {
218	2.47k	r = new_palette[0] & 0xFF0000;
219	2.47k	g = new_palette[0] & 0xFF00;
220	2.47k	b = new_palette[0] & 0xFF;
221	1.02M	for (x = 0; x < avctx->width; x++) {
222	1.02M	index = *ptr++;
223	1.02M	op = index >> 6;
224	1.02M	index &= 63;
225	1.02M	switch (op) {
226	760k	case 0:
227	760k	r = new_palette[index] & 0xFF0000;
228	760k	g = new_palette[index] & 0xFF00;
229	760k	b = new_palette[index] & 0xFF;
230	760k	break;
231	120k	case 1:
232	120k	b = (index << 2) \| (b & 3);
233	120k	break;
234	112k	case 2:
235	112k	r = (index << 18) \| (r & (3 << 16));
236	112k	break;
237	33.6k	case 3:
238	33.6k	g = (index << 10) \| (g & (3 << 8));
239	33.6k	break;
240	1.02M	}
241	1.02M	AV_WL24(out + x * 3, r \| g \| b);
242	1.02M	}
243	2.47k	out += frame->linesize[0];
244	2.47k	}
245	1.39k	}
246
247		static int cdxl_decode_frame(AVCodecContext avctx, AVFrame p,
248		int got_frame, AVPacket pkt)
249	250k	{
250	250k	CDXLVideoContext *c = avctx->priv_data;
251	250k	int ret, w, h, encoding, aligned_width, buf_size = pkt->size;
252	250k	const uint8_t *buf = pkt->data;
253
254	250k	if (buf_size < 32)
255	119k	return AVERROR_INVALIDDATA;
256	131k	c->type = buf[0];
257	131k	encoding = buf[1] & 7;
258	131k	c->format = buf[1] & 0xE0;
259	131k	w = AV_RB16(&buf[14]);
260	131k	h = AV_RB16(&buf[16]);
261	131k	c->bpp = buf[19];
262	131k	c->palette_size = AV_RB16(&buf[20]);
263	131k	c->palette = buf + 32;
264	131k	c->video = c->palette + c->palette_size;
265	131k	c->video_size = buf_size - c->palette_size - 32;
266
267	131k	if (c->type > 1)
268	2.52k	return AVERROR_INVALIDDATA;
269	128k	if (c->type == 1 && c->palette_size > 512)
270	409	return AVERROR_INVALIDDATA;
271	128k	if (c->type == 0 && c->palette_size > 768)
272	474	return AVERROR_INVALIDDATA;
273	128k	if (buf_size < c->palette_size + 32)
274	396	return AVERROR_INVALIDDATA;
275	127k	if (c->bpp < 1)
276	394	return AVERROR_INVALIDDATA;
277	127k	if (c->format != BIT_PLANAR && c->format != BIT_LINE && c->format != CHUNKY) {
278	243	avpriv_request_sample(avctx, "Pixel format 0x%0x", c->format);
279	243	return AVERROR_PATCHWELCOME;
280	243	}
281
282	127k	if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
283	1.31k	return ret;
284
285	125k	if (c->format == CHUNKY)
286	2.96k	aligned_width = avctx->width;
287	122k	else
288	122k	aligned_width = FFALIGN(c->avctx->width, 16);
289	125k	c->padded_bits = aligned_width - c->avctx->width;
290	125k	if (c->video_size < aligned_width * avctx->height * (int64_t)c->bpp / 8)
291	479	return AVERROR_INVALIDDATA;
292	125k	if (!encoding && c->palette_size && c->bpp <= 8 && c->format != CHUNKY) {
293	118k	avctx->pix_fmt = AV_PIX_FMT_PAL8;
294	118k	} else if (encoding == 1 && (c->bpp == 6 \|\| c->bpp == 8) && c->format != CHUNKY) {
295	3.62k	if (c->palette_size != (1 << (c->bpp - 1)))
296	240	return AVERROR_INVALIDDATA;
297	3.38k	avctx->pix_fmt = AV_PIX_FMT_BGR24;
298	3.38k	} else if (!encoding && c->bpp == 24 && c->format == CHUNKY &&
299	1.75k	!c->palette_size) {
300	1.54k	avctx->pix_fmt = AV_PIX_FMT_RGB24;
301	1.78k	} else {
302	1.78k	avpriv_request_sample(avctx, "Encoding %d, bpp %d and format 0x%x",
303	1.78k	encoding, c->bpp, c->format);
304	1.78k	return AVERROR_PATCHWELCOME;
305	1.78k	}
306
307	123k	if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
308	0	return ret;
309
310	123k	if (encoding) {
311	3.38k	av_fast_padded_malloc(&c->new_video, &c->new_video_size,
312	3.38k	h * w + AV_INPUT_BUFFER_PADDING_SIZE);
313	3.38k	if (!c->new_video)
314	0	return AVERROR(ENOMEM);
315	3.38k	if (c->bpp == 8)
316	1.39k	cdxl_decode_ham8(c, p);
317	1.99k	else
318	1.99k	cdxl_decode_ham6(c, p);
319	119k	} else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
320	118k	cdxl_decode_rgb(c, p);
321	118k	} else {
322	1.54k	cdxl_decode_raw(c, p);
323	1.54k	}
324	123k	*got_frame = 1;
325
326	123k	return buf_size;
327	123k	}
328
329		static av_cold int cdxl_decode_end(AVCodecContext *avctx)
330	1.64k	{
331	1.64k	CDXLVideoContext *c = avctx->priv_data;
332
333	1.64k	av_freep(&c->new_video);
334
335	1.64k	return 0;
336	1.64k	}
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		};