FFmpeg
vf_fieldhint.c
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1 /*
2  * Copyright (c) 2016 Paul B Mahol
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 Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 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 GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along 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/internal.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 #include "avfilter.h"
27 #include "internal.h"
28 #include "video.h"
29 
30 typedef struct FieldHintContext {
31  const AVClass *class;
32 
34  FILE *hint;
35  int mode;
36 
38 
39  int64_t line;
40  int nb_planes;
41  int eof;
42  int planewidth[4];
43  int planeheight[4];
45 
46 #define OFFSET(x) offsetof(FieldHintContext, x)
47 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
48 
49 static const AVOption fieldhint_options[] = {
50  { "hint", "set hint file", OFFSET(hint_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
51  { "mode", "set hint mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "mode" },
52  { "absolute", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
53  { "relative", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
54  { NULL }
55 };
56 
57 AVFILTER_DEFINE_CLASS(fieldhint);
58 
60 {
61  FieldHintContext *s = ctx->priv;
62  int ret;
63 
64  if (!s->hint_file_str) {
65  av_log(ctx, AV_LOG_ERROR, "Hint file must be set.\n");
66  return AVERROR(EINVAL);
67  }
68  s->hint = fopen(s->hint_file_str, "r");
69  if (!s->hint) {
70  ret = AVERROR(errno);
71  av_log(ctx, AV_LOG_ERROR, "%s: %s\n", s->hint_file_str, av_err2str(ret));
72  return ret;
73  }
74 
75  return 0;
76 }
77 
79 {
81  int fmt, ret;
82 
83  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
85  if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
86  desc->flags & AV_PIX_FMT_FLAG_PAL ||
88  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
89  return ret;
90  }
91 
92  return ff_set_common_formats(ctx, pix_fmts);
93 }
94 
96 {
97  FieldHintContext *s = inlink->dst->priv;
99  int ret;
100 
101  if ((ret = av_image_fill_linesizes(s->planewidth, inlink->format, inlink->w)) < 0)
102  return ret;
103 
104  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
105  s->planeheight[0] = s->planeheight[3] = inlink->h;
106 
108 
109  return 0;
110 }
111 
113 {
114  AVFilterContext *ctx = inlink->dst;
115  AVFilterLink *outlink = ctx->outputs[0];
116  FieldHintContext *s = ctx->priv;
117  AVFrame *out, *top, *bottom;
118  char buf[1024] = { 0 };
119  int64_t tf, bf;
120  int tfactor = 0, bfactor = 1;
121  char hint = '=', field = '=';
122  int p;
123 
124  av_frame_free(&s->frame[0]);
125  s->frame[0] = s->frame[1];
126  s->frame[1] = s->frame[2];
127  s->frame[2] = in;
128  if (!s->frame[1])
129  return 0;
130  else if (!s->frame[0]) {
131  s->frame[0] = av_frame_clone(s->frame[1]);
132  if (!s->frame[0])
133  return AVERROR(ENOMEM);
134  }
135 
136  while (1) {
137  if (fgets(buf, sizeof(buf)-1, s->hint)) {
138  s->line++;
139  if (buf[0] == '#' || buf[0] == ';') {
140  continue;
141  } else if (sscanf(buf, "%"PRId64",%"PRId64" %c %c", &tf, &bf, &hint, &field) == 4) {
142  ;
143  } else if (sscanf(buf, "%"PRId64",%"PRId64" %c", &tf, &bf, &hint) == 3) {
144  ;
145  } else if (sscanf(buf, "%"PRId64",%"PRId64"", &tf, &bf) == 2) {
146  ;
147  } else {
148  av_log(ctx, AV_LOG_ERROR, "Invalid entry at line %"PRId64".\n", s->line);
149  return AVERROR_INVALIDDATA;
150  }
151  switch (s->mode) {
152  case 0:
153  if (tf > outlink->frame_count_in + 1 || tf < FFMAX(0, outlink->frame_count_in - 1) ||
154  bf > outlink->frame_count_in + 1 || bf < FFMAX(0, outlink->frame_count_in - 1)) {
155  av_log(ctx, AV_LOG_ERROR, "Out of range frames %"PRId64" and/or %"PRId64" on line %"PRId64" for %"PRId64". input frame.\n", tf, bf, s->line, inlink->frame_count_out);
156  return AVERROR_INVALIDDATA;
157  }
158  break;
159  case 1:
160  if (tf > 1 || tf < -1 ||
161  bf > 1 || bf < -1) {
162  av_log(ctx, AV_LOG_ERROR, "Out of range %"PRId64" and/or %"PRId64" on line %"PRId64" for %"PRId64". input frame.\n", tf, bf, s->line, inlink->frame_count_out);
163  return AVERROR_INVALIDDATA;
164  }
165  };
166  break;
167  } else {
168  av_log(ctx, AV_LOG_ERROR, "Missing entry for %"PRId64". input frame.\n", inlink->frame_count_out);
169  return AVERROR_INVALIDDATA;
170  }
171  }
172 
173  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
174  if (!out)
175  return AVERROR(ENOMEM);
176  av_frame_copy_props(out, s->frame[1]);
177 
178  switch (s->mode) {
179  case 0:
180  top = s->frame[tf - outlink->frame_count_in + 1];
181  bottom = s->frame[bf - outlink->frame_count_in + 1];
182  break;
183  case 1:
184  top = s->frame[1 + tf];
185  bottom = s->frame[1 + bf];
186  break;
187  default:
188  av_assert0(0);
189  }
190 
191  switch (field) {
192  case 'b':
193  tfactor = 1;
194  top = bottom;
195  break;
196  case 't':
197  bfactor = 0;
198  bottom = top;
199  break;
200  case '=':
201  break;
202  default:
203  av_log(ctx, AV_LOG_ERROR, "Invalid field: %c.\n", field);
204  av_frame_free(&out);
205  return AVERROR(EINVAL);
206  }
207 
208  switch (hint) {
209  case '+':
210  out->interlaced_frame = 1;
211  break;
212  case '-':
213  out->interlaced_frame = 0;
214  break;
215  case '=':
216  break;
217  case 'b':
218  tfactor = 1;
219  top = bottom;
220  break;
221  case 't':
222  bfactor = 0;
223  bottom = top;
224  break;
225  default:
226  av_log(ctx, AV_LOG_ERROR, "Invalid hint: %c.\n", hint);
227  av_frame_free(&out);
228  return AVERROR(EINVAL);
229  }
230 
231  for (p = 0; p < s->nb_planes; p++) {
232  av_image_copy_plane(out->data[p],
233  out->linesize[p] * 2,
234  top->data[p] + tfactor * top->linesize[p],
235  top->linesize[p] * 2,
236  s->planewidth[p],
237  (s->planeheight[p] + 1) / 2);
238  av_image_copy_plane(out->data[p] + out->linesize[p],
239  out->linesize[p] * 2,
240  bottom->data[p] + bfactor * bottom->linesize[p],
241  bottom->linesize[p] * 2,
242  s->planewidth[p],
243  (s->planeheight[p] + 1) / 2);
244  }
245 
246  return ff_filter_frame(outlink, out);
247 }
248 
249 static int request_frame(AVFilterLink *outlink)
250 {
251  AVFilterContext *ctx = outlink->src;
252  FieldHintContext *s = ctx->priv;
253  int ret;
254 
255  if (s->eof)
256  return AVERROR_EOF;
257 
258  ret = ff_request_frame(ctx->inputs[0]);
259  if (ret == AVERROR_EOF && s->frame[2]) {
260  AVFrame *next = av_frame_clone(s->frame[2]);
261  if (!next)
262  return AVERROR(ENOMEM);
263  ret = filter_frame(ctx->inputs[0], next);
264  s->eof = 1;
265  }
266 
267  return ret;
268 }
269 
271 {
272  FieldHintContext *s = ctx->priv;
273 
274  if (s->hint)
275  fclose(s->hint);
276  s->hint = NULL;
277 
278  av_frame_free(&s->frame[0]);
279  av_frame_free(&s->frame[1]);
280  av_frame_free(&s->frame[2]);
281 }
282 
283 static const AVFilterPad inputs[] = {
284  {
285  .name = "default",
286  .type = AVMEDIA_TYPE_VIDEO,
287  .config_props = config_input,
288  .filter_frame = filter_frame,
289  },
290  { NULL }
291 };
292 
293 static const AVFilterPad outputs[] = {
294  {
295  .name = "default",
296  .type = AVMEDIA_TYPE_VIDEO,
297  .request_frame = request_frame,
298  },
299  { NULL }
300 };
301 
303  .name = "fieldhint",
304  .description = NULL_IF_CONFIG_SMALL("Field matching using hints."),
305  .priv_size = sizeof(FieldHintContext),
306  .priv_class = &fieldhint_class,
307  .init = init,
308  .uninit = uninit,
310  .inputs = inputs,
311  .outputs = outputs,
312 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
const char * fmt
Definition: avisynth_c.h:861
#define FLAGS
Definition: vf_fieldhint.c:47
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2562
Main libavfilter public API header.
static const AVFilterPad inputs[]
Definition: vf_fieldhint.c:283
const char * desc
Definition: nvenc.c:68
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
#define OFFSET(x)
Definition: vf_fieldhint.c:46
#define tf
Definition: regdef.h:73
const char * name
Pad name.
Definition: internal.h:60
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fieldhint.c:59
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
#define av_cold
Definition: attributes.h:82
AVOptions.
#define AVERROR_EOF
End of file.
Definition: error.h:55
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:442
#define av_log(a,...)
static int request_frame(AVFilterLink *outlink)
Definition: vf_fieldhint.c:249
AVFilter ff_vf_fieldhint
Definition: vf_fieldhint.c:302
A filter pad used for either input or output.
Definition: internal.h:54
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int 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:569
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this field
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
static int query_formats(AVFilterContext *ctx)
Definition: vf_fieldhint.c:78
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:336
#define FFMAX(a, b)
Definition: common.h:94
AVFILTER_DEFINE_CLASS(fieldhint)
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
char * hint_file_str
Definition: vf_fieldhint.c:33
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
static const AVOption fieldhint_options[]
Definition: vf_fieldhint.c:49
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void * buf
Definition: avisynth_c.h:766
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)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
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:89
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
static const AVFilterPad outputs[]
Definition: vf_fieldhint.c:293
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
static int config_input(AVFilterLink *inlink)
Definition: vf_fieldhint.c:95
AVFrame * frame[3]
Definition: vf_fieldhint.c:37
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_fieldhint.c:270
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_fieldhint.c:112
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58