FFmpeg
filtfmts.c
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1 /*
2  * Copyright (c) 2009 Stefano Sabatini
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 <stdio.h>
22 
24 #include "libavutil/mem.h"
25 #include "libavutil/pixdesc.h"
26 #include "libavutil/samplefmt.h"
27 
28 #define FF_INTERNAL_FIELDS 1
29 #include "libavfilter/framequeue.h"
30 
31 #include "libavfilter/avfilter.h"
32 #include "libavfilter/formats.h"
33 #include "libavfilter/internal.h"
34 
36 {
37  int i, j;
38 
39 #define PRINT_FMTS(inout, outin, INOUT) \
40  for (i = 0; i < filter_ctx->nb_##inout##puts; i++) { \
41  if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) { \
42  AVFilterFormats *fmts = \
43  filter_ctx->inout##puts[i]->outin##_formats; \
44  for (j = 0; j < fmts->nb_formats; j++) \
45  if(av_get_pix_fmt_name(fmts->formats[j])) \
46  printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
47  i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
48  av_get_pix_fmt_name(fmts->formats[j])); \
49  } else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
50  AVFilterFormats *fmts; \
51  AVFilterChannelLayouts *layouts; \
52  \
53  fmts = filter_ctx->inout##puts[i]->outin##_formats; \
54  for (j = 0; j < fmts->nb_formats; j++) \
55  printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
56  i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
57  av_get_sample_fmt_name(fmts->formats[j])); \
58  \
59  layouts = filter_ctx->inout##puts[i]->outin##_channel_layouts; \
60  for (j = 0; j < layouts->nb_channel_layouts; j++) { \
61  char buf[256]; \
62  av_get_channel_layout_string(buf, sizeof(buf), -1, \
63  layouts->channel_layouts[j]); \
64  printf(#INOUT "PUT[%d] %s: chlayout:%s\n", \
65  i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), buf); \
66  } \
67  } \
68  } \
69 
70  PRINT_FMTS(in, out, IN);
71  PRINT_FMTS(out, in, OUT);
72 }
73 
74 int main(int argc, char **argv)
75 {
76  const AVFilter *filter;
78  AVFilterGraph *graph_ctx;
79  const char *filter_name;
80  const char *filter_args = NULL;
81  int i;
82  int ret = 0;
83 
85 
86  if (argc < 2) {
87  fprintf(stderr, "Missing filter name as argument\n");
88  return 1;
89  }
90 
91  filter_name = argv[1];
92  if (argc > 2)
93  filter_args = argv[2];
94 
95  /* allocate graph */
96  graph_ctx = avfilter_graph_alloc();
97  if (!graph_ctx)
98  return 1;
99 
100  /* get a corresponding filter and open it */
101  if (!(filter = avfilter_get_by_name(filter_name))) {
102  fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
103  return 1;
104  }
105 
106  /* open filter and add it to the graph */
107  if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
108  fprintf(stderr, "Impossible to open filter with name '%s'\n",
109  filter_name);
110  return 1;
111  }
112  if (avfilter_init_str(filter_ctx, filter_args) < 0) {
113  fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
114  filter_name, filter_args);
115  return 1;
116  }
117 
118  /* create a link for each of the input pads */
119  for (i = 0; i < filter_ctx->nb_inputs; i++) {
121  if (!link) {
122  fprintf(stderr, "Unable to allocate memory for filter input link\n");
123  ret = 1;
124  goto fail;
125  }
126  link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
127  filter_ctx->inputs[i] = link;
128  }
129  for (i = 0; i < filter_ctx->nb_outputs; i++) {
131  if (!link) {
132  fprintf(stderr, "Unable to allocate memory for filter output link\n");
133  ret = 1;
134  goto fail;
135  }
136  link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
137  filter_ctx->outputs[i] = link;
138  }
139 
140  if (filter->query_formats)
141  ret = filter->query_formats(filter_ctx);
142  else
143  ret = ff_default_query_formats(filter_ctx);
144 
145  print_formats(filter_ctx);
146 
147 fail:
148  avfilter_free(filter_ctx);
149  avfilter_graph_free(&graph_ctx);
150  fflush(stdout);
151  return ret;
152 }
#define NULL
Definition: coverity.c:32
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:760
#define IN(x)
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:83
Main libavfilter public API header.
Memory handling functions.
void av_log_set_level(int level)
Set the log level.
Definition: log.c:385
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1039
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static FilteringContext * filter_ctx
Definition: transcoding.c:45
#define fail()
Definition: checkasm.h:121
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: allfilters.c:488
audio channel layout utility functions
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
#define PRINT_FMTS(inout, outin, INOUT)
static void print_formats(AVFilterContext *filter_ctx)
Definition: filtfmts.c:35
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:924
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
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
Filter definition.
Definition: avfilter.h:144
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:282
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 link
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
int main(int argc, char **argv)
Definition: filtfmts.c:74
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
internal API functions