FFmpeg  2.1.1
vf_phase.c
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1 /*
2  * Copyright (c) 2004 Ville Saari
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/avassert.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "video.h"
29 
30 enum PhaseMode {
40 };
41 
42 typedef struct PhaseContext {
43  const AVClass *class;
46  int nb_planes;
47  int planeheight[4];
48  int linesize[4];
49 } PhaseContext;
50 
51 #define OFFSET(x) offsetof(PhaseContext, x)
52 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
53 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
54 
55 static const AVOption phase_options[] = {
56  { "mode", "set phase mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=AUTO_ANALYZE}, PROGRESSIVE, AUTO_ANALYZE, FLAGS, "mode" },
57  CONST("p", "progressive", PROGRESSIVE, "mode"),
58  CONST("t", "top first", TOP_FIRST, "mode"),
59  CONST("b", "bottom first", BOTTOM_FIRST, "mode"),
60  CONST("T", "top first analyze", TOP_FIRST_ANALYZE, "mode"),
61  CONST("B", "bottom first analyze", BOTTOM_FIRST_ANALYZE, "mode"),
62  CONST("u", "analyze", ANALYZE, "mode"),
63  CONST("U", "full analyze", FULL_ANALYZE, "mode"),
64  CONST("a", "auto", AUTO, "mode"),
65  CONST("A", "auto analyze", AUTO_ANALYZE, "mode"),
66  { NULL }
67 };
68 
70 
72 {
73  static const enum AVPixelFormat pix_fmts[] = {
78  };
79 
81  return 0;
82 }
83 
84 static int config_input(AVFilterLink *inlink)
85 {
86  PhaseContext *s = inlink->dst->priv;
87  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
88  int ret;
89 
90  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
91  return ret;
92 
93  s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
94  s->planeheight[0] = s->planeheight[3] = inlink->h;
95 
97 
98  return 0;
99 }
100 
101 /*
102  * This macro interpolates the value of both fields at a point halfway
103  * between lines and takes the squared difference. In field resolution
104  * the point is a quarter pixel below a line in one field and a quarter
105  * pixel above a line in other.
106  *
107  * (The result is actually multiplied by 25)
108  */
109 #define DIFF(a, as, b, bs) (t = ((*a - b[bs]) << 2) + a[as << 1] - b[-bs], t * t)
110 
111 /*
112  * Find which field combination has the smallest average squared difference
113  * between the fields.
114  */
116  AVFrame *old, AVFrame *new)
117 {
118  double bdiff, tdiff, pdiff, scale;
119  const int ns = new->linesize[0];
120  const int os = old->linesize[0];
121  uint8_t *nptr = new->data[0];
122  uint8_t *optr = old->data[0];
123  const int h = new->height;
124  const int w = new->width;
125  int bdif, tdif, pdif;
126  enum PhaseMode mode = s->mode;
127  uint8_t *end, *rend;
128  int top, t;
129 
130  if (mode == AUTO) {
131  mode = new->interlaced_frame ? new->top_field_first ?
133  } else if (mode == AUTO_ANALYZE) {
134  mode = new->interlaced_frame ? new->top_field_first ?
136  }
137 
138  if (mode <= BOTTOM_FIRST) {
139  bdiff = pdiff = tdiff = 65536.0;
140  } else {
141  bdiff = pdiff = tdiff = 0.0;
142 
143  for (end = nptr + (h - 2) * ns, nptr += ns, optr += os, top = 0;
144  nptr < end; nptr += ns - w, optr += os - w, top ^= 1) {
145  pdif = tdif = bdif = 0;
146 
147  switch (mode) {
148  case TOP_FIRST_ANALYZE:
149  if (top) {
150  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
151  pdif += DIFF(nptr, ns, nptr, ns);
152  tdif += DIFF(nptr, ns, optr, os);
153  }
154  } else {
155  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
156  pdif += DIFF(nptr, ns, nptr, ns);
157  tdif += DIFF(optr, os, nptr, ns);
158  }
159  }
160  break;
162  if (top) {
163  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
164  pdif += DIFF(nptr, ns, nptr, ns);
165  bdif += DIFF(optr, os, nptr, ns);
166  }
167  } else {
168  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
169  pdif += DIFF(nptr, ns, nptr, ns);
170  bdif += DIFF(nptr, ns, optr, os);
171  }
172  }
173  break;
174  case ANALYZE:
175  if (top) {
176  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
177  tdif += DIFF(nptr, ns, optr, os);
178  bdif += DIFF(optr, os, nptr, ns);
179  }
180  } else {
181  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
182  bdif += DIFF(nptr, ns, optr, os);
183  tdif += DIFF(optr, os, nptr, ns);
184  }
185  }
186  break;
187  case FULL_ANALYZE:
188  if (top) {
189  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
190  pdif += DIFF(nptr, ns, nptr, ns);
191  tdif += DIFF(nptr, ns, optr, os);
192  bdif += DIFF(optr, os, nptr, ns);
193  }
194  } else {
195  for (rend = nptr + w; nptr < rend; nptr++, optr++) {
196  pdif += DIFF(nptr, ns, nptr, ns);
197  bdif += DIFF(nptr, ns, optr, os);
198  tdif += DIFF(optr, os, nptr, ns);
199  }
200  }
201  break;
202  default:
203  av_assert0(0);
204  }
205 
206  pdiff += (double)pdif;
207  tdiff += (double)tdif;
208  bdiff += (double)bdif;
209  }
210 
211  scale = 1.0 / (w * (h - 3)) / 25.0;
212  pdiff *= scale;
213  tdiff *= scale;
214  bdiff *= scale;
215 
216  if (mode == TOP_FIRST_ANALYZE) {
217  bdiff = 65536.0;
218  } else if (mode == BOTTOM_FIRST_ANALYZE) {
219  tdiff = 65536.0;
220  } else if (mode == ANALYZE) {
221  pdiff = 65536.0;
222  }
223 
224  if (bdiff < pdiff && bdiff < tdiff) {
225  mode = BOTTOM_FIRST;
226  } else if (tdiff < pdiff && tdiff < bdiff) {
227  mode = TOP_FIRST;
228  } else {
229  mode = PROGRESSIVE;
230  }
231  }
232 
233  av_log(ctx, AV_LOG_DEBUG, "mode=%c tdiff=%f bdiff=%f pdiff=%f\n",
234  mode == BOTTOM_FIRST ? 'b' : mode == TOP_FIRST ? 't' : 'p',
235  tdiff, bdiff, pdiff);
236  return mode;
237 }
238 
239 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
240 {
241  AVFilterContext *ctx = inlink->dst;
242  AVFilterLink *outlink = ctx->outputs[0];
243  PhaseContext *s = ctx->priv;
244  enum PhaseMode mode;
245  int plane, top, y;
246  AVFrame *out;
247 
248  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
249  if (!out) {
250  av_frame_free(&in);
251  return AVERROR(ENOMEM);
252  }
253  av_frame_copy_props(out, in);
254 
255  if (!s->frame) {
256  mode = PROGRESSIVE;
257  s->frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
258  if (!s->frame) {
259  av_frame_free(&in);
260  av_frame_free(&out);
261  return AVERROR(ENOMEM);
262  }
263  } else {
264  mode = analyze_plane(ctx, s, s->frame, in);
265  }
266 
267  for (plane = 0; plane < s->nb_planes; plane++) {
268  uint8_t *buf = s->frame->data[plane];
269  uint8_t *from = in->data[plane];
270  uint8_t *to = out->data[plane];
271 
272  for (y = 0, top = 1; y < s->planeheight[plane]; y++, top ^= 1) {
273  memcpy(to, mode == (top ? BOTTOM_FIRST : TOP_FIRST) ? buf : from, s->linesize[plane]);
274  memcpy(buf, from, s->linesize[plane]);
275 
276  buf += s->frame->linesize[plane];
277  from += in->linesize[plane];
278  to += out->linesize[plane];
279  }
280  }
281 
282  av_frame_free(&in);
283  return ff_filter_frame(outlink, out);
284 }
285 
286 static av_cold void uninit(AVFilterContext *ctx)
287 {
288  PhaseContext *s = ctx->priv;
289 
290  av_frame_free(&s->frame);
291 }
292 
293 static const AVFilterPad phase_inputs[] = {
294  {
295  .name = "default",
296  .type = AVMEDIA_TYPE_VIDEO,
297  .filter_frame = filter_frame,
298  .config_props = config_input,
299  },
300  { NULL }
301 };
302 
303 static const AVFilterPad phase_outputs[] = {
304  {
305  .name = "default",
306  .type = AVMEDIA_TYPE_VIDEO,
307  },
308  { NULL }
309 };
310 
312  .name = "phase",
313  .description = NULL_IF_CONFIG_SMALL("Phase shift fields."),
314  .priv_size = sizeof(PhaseContext),
315  .priv_class = &phase_class,
316  .uninit = uninit,
318  .inputs = phase_inputs,
319  .outputs = phase_outputs,
320 };
in the bitstream is reported as 00b
Definition: vc1.h:173
const char * s
Definition: avisynth_c.h:668
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1979
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
static const AVOption phase_options[]
Definition: vf_phase.c:55
AVOption.
Definition: opt.h:253
const char * name
Filter name.
Definition: avfilter.h:468
void * priv
private data for use by the filter
Definition: avfilter.h:648
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:111
planar YUV 4:2:2, 16bpp, (1 Cr &amp; Cb sample per 2x1 Y samples)
Definition: avcodec.h:4538
static int query_formats(AVFilterContext *ctx)
Definition: vf_phase.c:71
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
planar YUV 4:4:4 32bpp, (1 Cr &amp; Cb sample per 1x1 Y &amp; A samples)
Definition: avcodec.h:4693
Pixel format.
Definition: avcodec.h:4533
#define av_cold
Definition: avcodec.h:653
Y , 8bpp.
Definition: avcodec.h:4542
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:294
const char * name
Pad name.
Definition: internal.h:66
static const AVFilterPad phase_inputs[]
Definition: vf_phase.c:293
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1118
uint8_t
mode
Definition: f_perms.c:27
static enum PhaseMode analyze_plane(AVFilterContext *ctx, PhaseContext *s, AVFrame *old, AVFrame *new)
Definition: vf_phase.c:115
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only &quot;metadata&quot; fields from src to dst.
Definition: frame.c:446
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
static const AVFilterPad phase_outputs[]
Definition: vf_phase.c:303
const char * from
Definition: jacosubdec.c:68
#define OFFSET(x)
Definition: vf_phase.c:51
#define FF_CEIL_RSHIFT(a, b)
Definition: avcodec.h:916
planar YUV 4:2:2 24bpp, (1 Cr &amp; Cb sample per 2x1 Y &amp; A samples)
Definition: avcodec.h:4694
planar YUV 4:2:0, 20bpp, (1 Cr &amp; Cb sample per 2x2 Y &amp; A samples)
Definition: avcodec.h:4571
void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:531
const char * to
Definition: webvttdec.c:34
A filter pad used for either input or output.
Definition: internal.h:60
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){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));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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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);ff_audio_convert_init_arm(ac);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_dlog(ac->avr,"%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-> in
static int config_input(AVFilterLink *inlink)
Definition: vf_phase.c:84
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:77
planar GBRA 4:4:4:4 32bpp
Definition: avcodec.h:4712
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_...
Definition: avcodec.h:4548
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of PIX_FMT_YUV440P and setting color_range ...
Definition: avcodec.h:4570
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: avcodec.h:4168
Definition: vf_phase.c:38
planar YUV 4:1:1, 12bpp, (1 Cr &amp; Cb sample per 4x1 Y samples)
Definition: avcodec.h:4541
#define FLAGS
Definition: vf_phase.c:52
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:123
planar YUV 4:1:1, 12bpp, (1 Cr &amp; Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: avcodec.h:4715
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
PhaseMode
Definition: vf_phase.c:30
float y
ret
Definition: avfilter.c:961
enum PhaseMode mode
Definition: vf_phase.c:44
Main libavfilter public API header.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1938
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_...
Definition: avcodec.h:4546
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:642
planar YUV 4:2:0, 12bpp, (1 Cr &amp; Cb sample per 2x2 Y samples)
Definition: avcodec.h:4534
planar YUV 4:4:0 (1 Cr &amp; Cb sample per 1x2 Y samples)
Definition: avcodec.h:4569
int linesize[4]
Definition: vf_phase.c:48
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_phase.c:239
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:57
AVFrame * frame
Definition: vf_phase.c:45
planar GBR 4:4:4 24bpp
Definition: avcodec.h:4640
#define CONST(name, help, val, unit)
Definition: vf_phase.c:53
void * buf
Definition: avisynth_c.h:594
AVFilter avfilter_vf_phase
Definition: vf_phase.c:311
Describe the class of an AVClass context structure.
Definition: log.h:50
Filter definition.
Definition: avfilter.h:464
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:86
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:102
#define DIFF(a, as, b, bs)
Definition: vf_phase.c:109
planar YUV 4:4:4, 24bpp, (1 Cr &amp; Cb sample per 1x1 Y samples)
Definition: avcodec.h:4539
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
static const uint16_t scale[4]
int nb_planes
Definition: vf_phase.c:46
int planeheight[4]
Definition: vf_phase.c:47
static float t
Definition: muxing.c:123
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){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));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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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);ff_audio_convert_init_arm(ac);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_dlog(ac->avr,"%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
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:301
#define AVERROR(e)
An instance of a filter.
Definition: avfilter.h:627
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_phase.c:286
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal API functions
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_...
Definition: avcodec.h:4547
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107
planar YUV 4:1:0, 9bpp, (1 Cr &amp; Cb sample per 4x4 Y samples)
Definition: avcodec.h:4540