FFmpeg  3.4.9
cdgraphics.c
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1 /*
2  * CD Graphics Video Decoder
3  * Copyright (c) 2009 Michael Tison
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 #include "avcodec.h"
23 #include "bytestream.h"
24 #include "internal.h"
25 
26 /**
27  * @file
28  * @brief CD Graphics Video Decoder
29  * @author Michael Tison
30  * @see http://wiki.multimedia.cx/index.php?title=CD_Graphics
31  * @see http://www.ccs.neu.edu/home/bchafy/cdb/info/cdg
32  */
33 
34 /// default screen sizes
35 #define CDG_FULL_WIDTH 300
36 #define CDG_FULL_HEIGHT 216
37 #define CDG_DISPLAY_WIDTH 294
38 #define CDG_DISPLAY_HEIGHT 204
39 #define CDG_BORDER_WIDTH 6
40 #define CDG_BORDER_HEIGHT 12
41 
42 /// masks
43 #define CDG_COMMAND 0x09
44 #define CDG_MASK 0x3F
45 
46 /// instruction codes
47 #define CDG_INST_MEMORY_PRESET 1
48 #define CDG_INST_BORDER_PRESET 2
49 #define CDG_INST_TILE_BLOCK 6
50 #define CDG_INST_SCROLL_PRESET 20
51 #define CDG_INST_SCROLL_COPY 24
52 #define CDG_INST_TRANSPARENT_COL 28
53 #define CDG_INST_LOAD_PAL_LO 30
54 #define CDG_INST_LOAD_PAL_HIGH 31
55 #define CDG_INST_TILE_BLOCK_XOR 38
56 
57 /// data sizes
58 #define CDG_PACKET_SIZE 24
59 #define CDG_DATA_SIZE 16
60 #define CDG_TILE_HEIGHT 12
61 #define CDG_TILE_WIDTH 6
62 #define CDG_MINIMUM_PKT_SIZE 6
63 #define CDG_MINIMUM_SCROLL_SIZE 3
64 #define CDG_HEADER_SIZE 8
65 #define CDG_PALETTE_SIZE 16
66 
67 typedef struct CDGraphicsContext {
69  int hscroll;
70  int vscroll;
73 
75 {
76  CDGraphicsContext *cc = avctx->priv_data;
77 
78  cc->frame = av_frame_alloc();
79  if (!cc->frame)
80  return AVERROR(ENOMEM);
81  cc->transparency = -1;
82 
83  avctx->pix_fmt = AV_PIX_FMT_PAL8;
85 }
86 
88 {
89  int y;
90  int lsize = cc->frame->linesize[0];
91  uint8_t *buf = cc->frame->data[0];
92  int color = data[0] & 0x0F;
93 
94  if (!(data[1] & 0x0F)) {
95  /// fill the top and bottom borders
96  memset(buf, color, CDG_BORDER_HEIGHT * lsize);
97  memset(buf + (CDG_FULL_HEIGHT - CDG_BORDER_HEIGHT) * lsize,
98  color, CDG_BORDER_HEIGHT * lsize);
99 
100  /// fill the side borders
101  for (y = CDG_BORDER_HEIGHT; y < CDG_FULL_HEIGHT - CDG_BORDER_HEIGHT; y++) {
102  memset(buf + y * lsize, color, CDG_BORDER_WIDTH);
103  memset(buf + CDG_FULL_WIDTH - CDG_BORDER_WIDTH + y * lsize,
104  color, CDG_BORDER_WIDTH);
105  }
106  }
107 }
108 
109 static void cdg_load_palette(CDGraphicsContext *cc, uint8_t *data, int low)
110 {
111  uint8_t r, g, b;
112  uint16_t color;
113  int i;
114  int array_offset = low ? 0 : 8;
115  uint32_t *palette = (uint32_t *) cc->frame->data[1];
116 
117  for (i = 0; i < 8; i++) {
118  color = (data[2 * i] << 6) + (data[2 * i + 1] & 0x3F);
119  r = ((color >> 8) & 0x000F) * 17;
120  g = ((color >> 4) & 0x000F) * 17;
121  b = ((color ) & 0x000F) * 17;
122  palette[i + array_offset] = 0xFFU << 24 | r << 16 | g << 8 | b;
123  if (cc->transparency >= 0)
124  palette[cc->transparency] &= 0xFFFFFF;
125  }
126  cc->frame->palette_has_changed = 1;
127 }
128 
130 {
131  unsigned ci, ri;
132  int color;
133  int x, y;
134  int ai;
135  int stride = cc->frame->linesize[0];
136  uint8_t *buf = cc->frame->data[0];
137 
138  ri = (data[2] & 0x1F) * CDG_TILE_HEIGHT + cc->vscroll;
139  ci = (data[3] & 0x3F) * CDG_TILE_WIDTH + cc->hscroll;
140 
141  if (ri > (CDG_FULL_HEIGHT - CDG_TILE_HEIGHT))
142  return AVERROR(EINVAL);
143  if (ci > (CDG_FULL_WIDTH - CDG_TILE_WIDTH))
144  return AVERROR(EINVAL);
145 
146  for (y = 0; y < CDG_TILE_HEIGHT; y++) {
147  for (x = 0; x < CDG_TILE_WIDTH; x++) {
148  if (!((data[4 + y] >> (5 - x)) & 0x01))
149  color = data[0] & 0x0F;
150  else
151  color = data[1] & 0x0F;
152 
153  ai = ci + x + (stride * (ri + y));
154  if (b)
155  color ^= buf[ai];
156  buf[ai] = color;
157  }
158  }
159 
160  return 0;
161 }
162 
163 #define UP 2
164 #define DOWN 1
165 #define LEFT 2
166 #define RIGHT 1
167 
168 static void cdg_copy_rect_buf(int out_tl_x, int out_tl_y, uint8_t *out,
169  int in_tl_x, int in_tl_y, uint8_t *in,
170  int w, int h, int stride)
171 {
172  int y;
173 
174  in += in_tl_x + in_tl_y * stride;
175  out += out_tl_x + out_tl_y * stride;
176  for (y = 0; y < h; y++)
177  memcpy(out + y * stride, in + y * stride, w);
178 }
179 
180 static void cdg_fill_rect_preset(int tl_x, int tl_y, uint8_t *out,
181  int color, int w, int h, int stride)
182 {
183  int y;
184 
185  for (y = tl_y; y < tl_y + h; y++)
186  memset(out + tl_x + y * stride, color, w);
187 }
188 
189 static void cdg_fill_wrapper(int out_tl_x, int out_tl_y, uint8_t *out,
190  int in_tl_x, int in_tl_y, uint8_t *in,
191  int color, int w, int h, int stride, int roll)
192 {
193  if (roll) {
194  cdg_copy_rect_buf(out_tl_x, out_tl_y, out, in_tl_x, in_tl_y,
195  in, w, h, stride);
196  } else {
197  cdg_fill_rect_preset(out_tl_x, out_tl_y, out, color, w, h, stride);
198  }
199 }
200 
202  AVFrame *new_frame, int roll_over)
203 {
204  int color;
205  int hscmd, h_off, hinc, vscmd, v_off, vinc;
206  int y;
207  int stride = cc->frame->linesize[0];
208  uint8_t *in = cc->frame->data[0];
209  uint8_t *out = new_frame->data[0];
210 
211  color = data[0] & 0x0F;
212  hscmd = (data[1] & 0x30) >> 4;
213  vscmd = (data[2] & 0x30) >> 4;
214 
215  h_off = FFMIN(data[1] & 0x07, CDG_BORDER_WIDTH - 1);
216  v_off = FFMIN(data[2] & 0x0F, CDG_BORDER_HEIGHT - 1);
217 
218  /// find the difference and save the offset for cdg_tile_block usage
219  hinc = h_off - cc->hscroll;
220  vinc = v_off - cc->vscroll;
221  cc->hscroll = h_off;
222  cc->vscroll = v_off;
223 
224  if (vscmd == UP)
225  vinc -= 12;
226  if (vscmd == DOWN)
227  vinc += 12;
228  if (hscmd == LEFT)
229  hinc -= 6;
230  if (hscmd == RIGHT)
231  hinc += 6;
232 
233  if (!hinc && !vinc)
234  return;
235 
236  memcpy(new_frame->data[1], cc->frame->data[1], CDG_PALETTE_SIZE * 4);
237 
238  for (y = FFMAX(0, vinc); y < FFMIN(CDG_FULL_HEIGHT + vinc, CDG_FULL_HEIGHT); y++)
239  memcpy(out + FFMAX(0, hinc) + stride * y,
240  in + FFMAX(0, hinc) - hinc + (y - vinc) * stride,
241  FFMIN(stride + hinc, stride));
242 
243  if (vinc > 0)
244  cdg_fill_wrapper(0, 0, out,
245  0, CDG_FULL_HEIGHT - vinc, in, color,
246  stride, vinc, stride, roll_over);
247  else if (vinc < 0)
248  cdg_fill_wrapper(0, CDG_FULL_HEIGHT + vinc, out,
249  0, 0, in, color,
250  stride, -1 * vinc, stride, roll_over);
251 
252  if (hinc > 0)
253  cdg_fill_wrapper(0, 0, out,
254  CDG_FULL_WIDTH - hinc, 0, in, color,
255  hinc, CDG_FULL_HEIGHT, stride, roll_over);
256  else if (hinc < 0)
257  cdg_fill_wrapper(CDG_FULL_WIDTH + hinc, 0, out,
258  0, 0, in, color,
259  -1 * hinc, CDG_FULL_HEIGHT, stride, roll_over);
260 
261 }
262 
264  void *data, int *got_frame, AVPacket *avpkt)
265 {
266  GetByteContext gb;
267  int buf_size = avpkt->size;
268  int ret;
269  uint8_t command, inst;
270  uint8_t cdg_data[CDG_DATA_SIZE] = {0};
271  AVFrame *frame = data;
272  CDGraphicsContext *cc = avctx->priv_data;
273 
274  if (buf_size < CDG_MINIMUM_PKT_SIZE) {
275  av_log(avctx, AV_LOG_ERROR, "buffer too small for decoder\n");
276  return AVERROR(EINVAL);
277  }
278  if (buf_size > CDG_HEADER_SIZE + CDG_DATA_SIZE) {
279  av_log(avctx, AV_LOG_ERROR, "buffer too big for decoder\n");
280  return AVERROR(EINVAL);
281  }
282 
283  bytestream2_init(&gb, avpkt->data, avpkt->size);
284 
285  if ((ret = ff_reget_buffer(avctx, cc->frame)) < 0)
286  return ret;
287  if (!avctx->frame_number) {
288  memset(cc->frame->data[0], 0, cc->frame->linesize[0] * avctx->height);
289  memset(cc->frame->data[1], 0, AVPALETTE_SIZE);
290  }
291 
292  command = bytestream2_get_byte(&gb);
293  inst = bytestream2_get_byte(&gb);
294  inst &= CDG_MASK;
295  bytestream2_skip(&gb, 2);
296  bytestream2_get_buffer(&gb, cdg_data, sizeof(cdg_data));
297 
298  if ((command & CDG_MASK) == CDG_COMMAND) {
299  switch (inst) {
301  if (!(cdg_data[1] & 0x0F))
302  memset(cc->frame->data[0], cdg_data[0] & 0x0F,
303  cc->frame->linesize[0] * CDG_FULL_HEIGHT);
304  break;
307  if (buf_size - CDG_HEADER_SIZE < CDG_DATA_SIZE) {
308  av_log(avctx, AV_LOG_ERROR, "buffer too small for loading palette\n");
309  return AVERROR(EINVAL);
310  }
311 
312  cdg_load_palette(cc, cdg_data, inst == CDG_INST_LOAD_PAL_LO);
313  break;
315  cdg_border_preset(cc, cdg_data);
316  break;
318  case CDG_INST_TILE_BLOCK:
319  if (buf_size - CDG_HEADER_SIZE < CDG_DATA_SIZE) {
320  av_log(avctx, AV_LOG_ERROR, "buffer too small for drawing tile\n");
321  return AVERROR(EINVAL);
322  }
323 
324  ret = cdg_tile_block(cc, cdg_data, inst == CDG_INST_TILE_BLOCK_XOR);
325  if (ret) {
326  av_log(avctx, AV_LOG_ERROR, "tile is out of range\n");
327  return ret;
328  }
329  break;
332  if (buf_size - CDG_HEADER_SIZE < CDG_MINIMUM_SCROLL_SIZE) {
333  av_log(avctx, AV_LOG_ERROR, "buffer too small for scrolling\n");
334  return AVERROR(EINVAL);
335  }
336 
337  if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
338  return ret;
339 
340  cdg_scroll(cc, cdg_data, frame, inst == CDG_INST_SCROLL_COPY);
341  av_frame_unref(cc->frame);
342  ret = av_frame_ref(cc->frame, frame);
343  if (ret < 0)
344  return ret;
345  break;
347  cc->transparency = cdg_data[0] & 0xF;
348  break;
349  default:
350  break;
351  }
352 
353  if (!frame->data[0]) {
354  ret = av_frame_ref(frame, cc->frame);
355  if (ret < 0)
356  return ret;
357  }
358  *got_frame = 1;
359  } else {
360  *got_frame = 0;
361  }
362 
363  return avpkt->size;
364 }
365 
367 {
368  CDGraphicsContext *cc = avctx->priv_data;
369 
370  av_frame_free(&cc->frame);
371 
372  return 0;
373 }
374 
376  .name = "cdgraphics",
377  .long_name = NULL_IF_CONFIG_SMALL("CD Graphics video"),
378  .type = AVMEDIA_TYPE_VIDEO,
380  .priv_data_size = sizeof(CDGraphicsContext),
382  .close = cdg_decode_end,
384  .capabilities = AV_CODEC_CAP_DR1,
385 };
#define CDG_BORDER_HEIGHT
Definition: cdgraphics.c:40
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
#define CDG_INST_TRANSPARENT_COL
Definition: cdgraphics.c:52
#define CDG_TILE_WIDTH
Definition: cdgraphics.c:61
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:211
const char * g
Definition: vf_curves.c:112
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: avcodec.h:1680
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1989
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
static void cdg_border_preset(CDGraphicsContext *cc, uint8_t *data)
Definition: cdgraphics.c:87
#define CDG_INST_LOAD_PAL_HIGH
Definition: cdgraphics.c:54
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:3739
#define UP
Definition: cdgraphics.c:163
#define CDG_INST_SCROLL_PRESET
Definition: cdgraphics.c:50
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: decode.c:1718
static void cdg_fill_wrapper(int out_tl_x, int out_tl_y, uint8_t *out, int in_tl_x, int in_tl_y, uint8_t *in, int color, int w, int h, int stride, int roll)
Definition: cdgraphics.c:189
static int cdg_tile_block(CDGraphicsContext *cc, uint8_t *data, int b)
Definition: cdgraphics.c:129
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
static void cdg_copy_rect_buf(int out_tl_x, int out_tl_y, uint8_t *out, int in_tl_x, int in_tl_y, uint8_t *in, int w, int h, int stride)
Definition: cdgraphics.c:168
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
#define CDG_COMMAND
masks
Definition: cdgraphics.c:43
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:395
const char data[16]
Definition: mxf.c:90
uint8_t * data
Definition: avcodec.h:1679
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
#define CDG_HEADER_SIZE
Definition: cdgraphics.c:64
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static av_cold int cdg_decode_init(AVCodecContext *avctx)
Definition: cdgraphics.c:74
#define CDG_MINIMUM_PKT_SIZE
Definition: cdgraphics.c:62
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
static void cdg_fill_rect_preset(int tl_x, int tl_y, uint8_t *out, int color, int w, int h, int stride)
Definition: cdgraphics.c:180
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:181
#define CDG_PALETTE_SIZE
Definition: cdgraphics.c:65
const char * r
Definition: vf_curves.c:111
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
#define CDG_INST_BORDER_PRESET
Definition: cdgraphics.c:48
static av_cold int cdg_decode_end(AVCodecContext *avctx)
Definition: cdgraphics.c:366
#define CDG_INST_TILE_BLOCK
Definition: cdgraphics.c:49
const char * name
Name of the codec implementation.
Definition: avcodec.h:3746
#define FFMAX(a, b)
Definition: common.h:94
#define CDG_FULL_WIDTH
default screen sizes
Definition: cdgraphics.c:35
#define FFMIN(a, b)
Definition: common.h:96
static int cdg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cdgraphics.c:263
#define CDG_INST_MEMORY_PRESET
instruction codes
Definition: cdgraphics.c:47
#define CDG_TILE_HEIGHT
Definition: cdgraphics.c:60
static void cdg_scroll(CDGraphicsContext *cc, uint8_t *data, AVFrame *new_frame, int roll_over)
Definition: cdgraphics.c:201
#define CDG_DATA_SIZE
Definition: cdgraphics.c:59
static void cdg_load_palette(CDGraphicsContext *cc, uint8_t *data, int low)
Definition: cdgraphics.c:109
Libavcodec external API header.
AVFrame * frame
Definition: cdgraphics.c:68
AVCodec ff_cdgraphics_decoder
Definition: cdgraphics.c:375
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
main external API structure.
Definition: avcodec.h:1761
#define CDG_INST_LOAD_PAL_LO
Definition: cdgraphics.c:53
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:863
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1669
#define DOWN
Definition: cdgraphics.c:164
void * buf
Definition: avisynth_c.h:690
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:358
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:505
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
#define CDG_INST_TILE_BLOCK_XOR
Definition: cdgraphics.c:55
#define CDG_BORDER_WIDTH
Definition: cdgraphics.c:39
common internal api header.
void * priv_data
Definition: avcodec.h:1803
#define CDG_FULL_HEIGHT
Definition: cdgraphics.c:36
#define RIGHT
Definition: cdgraphics.c:166
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2554
FILE * out
Definition: movenc.c:54
#define CDG_INST_SCROLL_COPY
Definition: cdgraphics.c:51
#define LEFT
Definition: cdgraphics.c:165
#define CDG_MASK
Definition: cdgraphics.c:44
This structure stores compressed data.
Definition: avcodec.h:1656
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1397
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:1002
for(j=16;j >0;--j)
#define CDG_MINIMUM_SCROLL_SIZE
Definition: cdgraphics.c:63