FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
cdxl.c
Go to the documentation of this file.
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/imgutils.h"
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include "internal.h"
35 
36 #define BIT_PLANAR 0x00
37 #define CHUNKY 0x20
38 #define BYTE_PLANAR 0x40
39 #define BIT_LINE 0x80
40 #define BYTE_LINE 0xC0
41 
42 typedef struct CDXLVideoContext {
44  int bpp;
45  int format;
47  const uint8_t *palette;
49  const uint8_t *video;
54 
56 {
57  CDXLVideoContext *c = avctx->priv_data;
58 
59  c->new_video_size = 0;
60  c->avctx = avctx;
61 
62  return 0;
63 }
64 
65 static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
66 {
67  int i;
68 
69  for (i = 0; i < c->palette_size / 2; i++) {
70  unsigned rgb = AV_RB16(&c->palette[i * 2]);
71  unsigned r = ((rgb >> 8) & 0xF) * 0x11;
72  unsigned g = ((rgb >> 4) & 0xF) * 0x11;
73  unsigned b = (rgb & 0xF) * 0x11;
74  AV_WN32(&new_palette[i], (0xFFU << 24) | (r << 16) | (g << 8) | b);
75  }
76 }
77 
78 static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
79 {
80  GetBitContext gb;
81  int x, y, plane;
82 
83  if (init_get_bits8(&gb, c->video, c->video_size) < 0)
84  return;
85  for (plane = 0; plane < c->bpp; plane++) {
86  for (y = 0; y < c->avctx->height; y++) {
87  for (x = 0; x < c->avctx->width; x++)
88  out[linesize * y + x] |= get_bits1(&gb) << plane;
89  skip_bits(&gb, c->padded_bits);
90  }
91  }
92 }
93 
94 static void bitline2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
95 {
96  GetBitContext gb;
97  int x, y, plane;
98 
99  if (init_get_bits8(&gb, c->video, c->video_size) < 0)
100  return;
101  for (y = 0; y < c->avctx->height; y++) {
102  for (plane = 0; plane < c->bpp; plane++) {
103  for (x = 0; x < c->avctx->width; x++)
104  out[linesize * y + x] |= get_bits1(&gb) << plane;
105  skip_bits(&gb, c->padded_bits);
106  }
107  }
108 }
109 
110 static void import_format(CDXLVideoContext *c, int linesize, uint8_t *out)
111 {
112  memset(out, 0, linesize * c->avctx->height);
113 
114  switch (c->format) {
115  case BIT_PLANAR:
116  bitplanar2chunky(c, linesize, out);
117  break;
118  case BIT_LINE:
119  bitline2chunky(c, linesize, out);
120  break;
121  }
122 }
123 
125 {
126  uint32_t *new_palette = (uint32_t *)frame->data[1];
127 
128  memset(frame->data[1], 0, AVPALETTE_SIZE);
129  import_palette(c, new_palette);
130  import_format(c, frame->linesize[0], frame->data[0]);
131 }
132 
134 {
135  AVCodecContext *avctx = c->avctx;
136  uint32_t new_palette[16], r, g, b;
137  uint8_t *ptr, *out, index, op;
138  int x, y;
139 
140  ptr = c->new_video;
141  out = frame->data[0];
142 
143  import_palette(c, new_palette);
144  import_format(c, avctx->width, c->new_video);
145 
146  for (y = 0; y < avctx->height; y++) {
147  r = new_palette[0] & 0xFF0000;
148  g = new_palette[0] & 0xFF00;
149  b = new_palette[0] & 0xFF;
150  for (x = 0; x < avctx->width; x++) {
151  index = *ptr++;
152  op = index >> 4;
153  index &= 15;
154  switch (op) {
155  case 0:
156  r = new_palette[index] & 0xFF0000;
157  g = new_palette[index] & 0xFF00;
158  b = new_palette[index] & 0xFF;
159  break;
160  case 1:
161  b = index * 0x11;
162  break;
163  case 2:
164  r = index * 0x11 << 16;
165  break;
166  case 3:
167  g = index * 0x11 << 8;
168  break;
169  }
170  AV_WL24(out + x * 3, r | g | b);
171  }
172  out += frame->linesize[0];
173  }
174 }
175 
177 {
178  AVCodecContext *avctx = c->avctx;
179  uint32_t new_palette[64], r, g, b;
180  uint8_t *ptr, *out, index, op;
181  int x, y;
182 
183  ptr = c->new_video;
184  out = frame->data[0];
185 
186  import_palette(c, new_palette);
187  import_format(c, avctx->width, c->new_video);
188 
189  for (y = 0; y < avctx->height; y++) {
190  r = new_palette[0] & 0xFF0000;
191  g = new_palette[0] & 0xFF00;
192  b = new_palette[0] & 0xFF;
193  for (x = 0; x < avctx->width; x++) {
194  index = *ptr++;
195  op = index >> 6;
196  index &= 63;
197  switch (op) {
198  case 0:
199  r = new_palette[index] & 0xFF0000;
200  g = new_palette[index] & 0xFF00;
201  b = new_palette[index] & 0xFF;
202  break;
203  case 1:
204  b = (index << 2) | (b & 3);
205  break;
206  case 2:
207  r = (index << 18) | (r & (3 << 16));
208  break;
209  case 3:
210  g = (index << 10) | (g & (3 << 8));
211  break;
212  }
213  AV_WL24(out + x * 3, r | g | b);
214  }
215  out += frame->linesize[0];
216  }
217 }
218 
219 static int cdxl_decode_frame(AVCodecContext *avctx, void *data,
220  int *got_frame, AVPacket *pkt)
221 {
222  CDXLVideoContext *c = avctx->priv_data;
223  AVFrame * const p = data;
224  int ret, w, h, encoding, aligned_width, buf_size = pkt->size;
225  const uint8_t *buf = pkt->data;
226 
227  if (buf_size < 32)
228  return AVERROR_INVALIDDATA;
229  encoding = buf[1] & 7;
230  c->format = buf[1] & 0xE0;
231  w = AV_RB16(&buf[14]);
232  h = AV_RB16(&buf[16]);
233  c->bpp = buf[19];
234  c->palette_size = AV_RB16(&buf[20]);
235  c->palette = buf + 32;
236  c->video = c->palette + c->palette_size;
237  c->video_size = buf_size - c->palette_size - 32;
238 
239  if (c->palette_size > 512)
240  return AVERROR_INVALIDDATA;
241  if (buf_size < c->palette_size + 32)
242  return AVERROR_INVALIDDATA;
243  if (c->bpp < 1)
244  return AVERROR_INVALIDDATA;
245  if (c->format != BIT_PLANAR && c->format != BIT_LINE) {
246  avpriv_request_sample(avctx, "Pixel format 0x%0x", c->format);
247  return AVERROR_PATCHWELCOME;
248  }
249 
250  if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
251  return ret;
252 
253  aligned_width = FFALIGN(c->avctx->width, 16);
254  c->padded_bits = aligned_width - c->avctx->width;
255  if (c->video_size < aligned_width * avctx->height * c->bpp / 8)
256  return AVERROR_INVALIDDATA;
257  if (!encoding && c->palette_size && c->bpp <= 8) {
258  avctx->pix_fmt = AV_PIX_FMT_PAL8;
259  } else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8)) {
260  if (c->palette_size != (1 << (c->bpp - 1)))
261  return AVERROR_INVALIDDATA;
262  avctx->pix_fmt = AV_PIX_FMT_BGR24;
263  } else {
264  avpriv_request_sample(avctx, "Encoding %d and bpp %d",
265  encoding, c->bpp);
266  return AVERROR_PATCHWELCOME;
267  }
268 
269  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
270  return ret;
272 
273  if (encoding) {
276  if (!c->new_video)
277  return AVERROR(ENOMEM);
278  if (c->bpp == 8)
279  cdxl_decode_ham8(c, p);
280  else
281  cdxl_decode_ham6(c, p);
282  } else {
283  cdxl_decode_rgb(c, p);
284  }
285  *got_frame = 1;
286 
287  return buf_size;
288 }
289 
291 {
292  CDXLVideoContext *c = avctx->priv_data;
293 
294  av_freep(&c->new_video);
295 
296  return 0;
297 }
298 
300  .name = "cdxl",
301  .long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
302  .type = AVMEDIA_TYPE_VIDEO,
303  .id = AV_CODEC_ID_CDXL,
304  .priv_data_size = sizeof(CDXLVideoContext),
306  .close = cdxl_decode_end,
308  .capabilities = CODEC_CAP_DR1,
309 };
int plane
Definition: avisynth_c.h:291
#define BIT_LINE
Definition: cdxl.c:39
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int format
Definition: cdxl.c:45
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
misc image utilities
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:229
const char * g
Definition: vf_curves.c:108
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int video_size
Definition: cdxl.c:50
int size
Definition: avcodec.h:1174
const char * b
Definition: vf_curves.c:109
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1471
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:139
static void cdxl_decode_ham8(CDXLVideoContext *c, AVFrame *frame)
Definition: cdxl.c:176
static AVPacket pkt
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:85
AVCodec.
Definition: avcodec.h:3208
#define FFALIGN(x, a)
Definition: common.h:71
const uint8_t * palette
Definition: cdxl.c:47
#define AV_WL24(p, d)
Definition: intreadwrite.h:464
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
#define av_cold
Definition: attributes.h:74
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
#define AVPALETTE_SIZE
Definition: pixfmt.h:33
AVCodec ff_cdxl_decoder
Definition: cdxl.c:299
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:794
static AVFrame * frame
static av_cold int cdxl_decode_end(AVCodecContext *avctx)
Definition: cdxl.c:290
uint8_t * data
Definition: avcodec.h:1173
bitstream reader API header.
static int cdxl_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)
Definition: cdxl.c:219
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * r
Definition: vf_curves.c:107
const char * name
Name of the codec implementation.
Definition: avcodec.h:3215
Libavcodec external API header.
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:635
static void bitline2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
Definition: cdxl.c:94
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
float y
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1430
static av_cold int cdxl_decode_init(AVCodecContext *avctx)
Definition: cdxl.c:55
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:441
main external API structure.
Definition: avcodec.h:1252
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:1035
void * buf
Definition: avisynth_c.h:553
AVCodecContext * avctx
Definition: cdxl.c:43
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:304
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:297
int index
Definition: gxfenc.c:89
uint8_t * new_video
Definition: cdxl.c:51
#define BIT_PLANAR
Definition: cdxl.c:36
int new_video_size
Definition: cdxl.c:52
static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
Definition: cdxl.c:78
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
static void cdxl_decode_rgb(CDXLVideoContext *c, AVFrame *frame)
Definition: cdxl.c:124
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
Definition: anm.c:78
common internal api header.
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
static double c[64]
void * priv_data
Definition: avcodec.h:1294
static void cdxl_decode_ham6(CDXLVideoContext *c, AVFrame *frame)
Definition: cdxl.c:133
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
const uint8_t * video
Definition: cdxl.c:49
static void import_format(CDXLVideoContext *c, int linesize, uint8_t *out)
Definition: cdxl.c:110
#define av_freep(p)
int palette_size
Definition: cdxl.c:48
int padded_bits
Definition: cdxl.c:46
This structure stores compressed data.
Definition: avcodec.h:1150
static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
Definition: cdxl.c:65