FFmpeg
af_haas.c
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1 /*
2  * Copyright (c) 2001-2010 Vladimir Sadovnikov
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/channel_layout.h"
22 #include "libavutil/opt.h"
23 #include "avfilter.h"
24 #include "audio.h"
25 #include "formats.h"
26 
27 #define MAX_HAAS_DELAY 40
28 
29 typedef struct HaasContext {
30  const AVClass *class;
31 
32  int par_m_source;
33  double par_delay0;
34  double par_delay1;
35  int par_phase0;
36  int par_phase1;
37  int par_middle_phase;
38  double par_side_gain;
39  double par_gain0;
40  double par_gain1;
41  double par_balance0;
42  double par_balance1;
43  double level_in;
44  double level_out;
45 
46  double *buffer;
47  size_t buffer_size;
48  uint32_t write_ptr;
49  uint32_t delay[2];
50  double balance_l[2];
51  double balance_r[2];
52  double phase0;
53  double phase1;
54 } HaasContext;
55 
56 #define OFFSET(x) offsetof(HaasContext, x)
57 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
58 
59 static const AVOption haas_options[] = {
60  { "level_in", "set level in", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
61  { "level_out", "set level out", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
62  { "side_gain", "set side gain", OFFSET(par_side_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
63  { "middle_source", "set middle source", OFFSET(par_m_source), AV_OPT_TYPE_INT, {.i64=2}, 0, 3, A, .unit = "source" },
64  { "left", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, .unit = "source" },
65  { "right", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, .unit = "source" },
66  { "mid", "L+R", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, .unit = "source" },
67  { "side", "L-R", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, A, .unit = "source" },
68  { "middle_phase", "set middle phase", OFFSET(par_middle_phase), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
69  { "left_delay", "set left delay", OFFSET(par_delay0), AV_OPT_TYPE_DOUBLE, {.dbl=2.05}, 0, MAX_HAAS_DELAY, A },
70  { "left_balance", "set left balance", OFFSET(par_balance0), AV_OPT_TYPE_DOUBLE, {.dbl=-1.0}, -1, 1, A },
71  { "left_gain", "set left gain", OFFSET(par_gain0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
72  { "left_phase", "set left phase", OFFSET(par_phase0), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
73  { "right_delay", "set right delay", OFFSET(par_delay1), AV_OPT_TYPE_DOUBLE, {.dbl=2.12}, 0, MAX_HAAS_DELAY, A },
74  { "right_balance", "set right balance", OFFSET(par_balance1), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, A },
75  { "right_gain", "set right gain", OFFSET(par_gain1), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
76  { "right_phase", "set right phase", OFFSET(par_phase1), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A },
77  { NULL }
78 };
79 
80 AVFILTER_DEFINE_CLASS(haas);
81 
82 static int query_formats(AVFilterContext *ctx)
83 {
84  AVFilterFormats *formats = NULL;
85  AVFilterChannelLayouts *layout = NULL;
86  int ret;
87 
88  if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBL )) < 0 ||
89  (ret = ff_set_common_formats (ctx , formats )) < 0 ||
90  (ret = ff_add_channel_layout (&layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
91  (ret = ff_set_common_channel_layouts (ctx , layout )) < 0)
92  return ret;
93 
94  return ff_set_common_all_samplerates(ctx);
95 }
96 
97 static int config_input(AVFilterLink *inlink)
98 {
99  AVFilterContext *ctx = inlink->dst;
100  HaasContext *s = ctx->priv;
101  size_t min_buf_size = (size_t)(inlink->sample_rate * MAX_HAAS_DELAY * 0.001);
102  size_t new_buf_size = 1;
103 
104  while (new_buf_size < min_buf_size)
105  new_buf_size <<= 1;
106 
107  av_freep(&s->buffer);
108  s->buffer = av_calloc(new_buf_size, sizeof(*s->buffer));
109  if (!s->buffer)
110  return AVERROR(ENOMEM);
111 
112  s->buffer_size = new_buf_size;
113  s->write_ptr = 0;
114 
115  s->delay[0] = (uint32_t)(s->par_delay0 * 0.001 * inlink->sample_rate);
116  s->delay[1] = (uint32_t)(s->par_delay1 * 0.001 * inlink->sample_rate);
117 
118  s->phase0 = s->par_phase0 ? 1.0 : -1.0;
119  s->phase1 = s->par_phase1 ? 1.0 : -1.0;
120 
121  s->balance_l[0] = (s->par_balance0 + 1) / 2 * s->par_gain0 * s->phase0;
122  s->balance_r[0] = (1.0 - (s->par_balance0 + 1) / 2) * (s->par_gain0) * s->phase0;
123  s->balance_l[1] = (s->par_balance1 + 1) / 2 * s->par_gain1 * s->phase1;
124  s->balance_r[1] = (1.0 - (s->par_balance1 + 1) / 2) * (s->par_gain1) * s->phase1;
125 
126  return 0;
127 }
128 
129 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
130 {
131  AVFilterContext *ctx = inlink->dst;
132  AVFilterLink *outlink = ctx->outputs[0];
133  HaasContext *s = ctx->priv;
134  const double *src = (const double *)in->data[0];
135  const double level_in = s->level_in;
136  const double level_out = s->level_out;
137  const uint32_t mask = s->buffer_size - 1;
138  double *buffer = s->buffer;
139  AVFrame *out;
140  double *dst;
141  int n;
142 
143  if (av_frame_is_writable(in)) {
144  out = in;
145  } else {
146  out = ff_get_audio_buffer(outlink, in->nb_samples);
147  if (!out) {
148  av_frame_free(&in);
149  return AVERROR(ENOMEM);
150  }
151  av_frame_copy_props(out, in);
152  }
153  dst = (double *)out->data[0];
154 
155  for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) {
156  double mid, side[2], side_l, side_r;
157  uint32_t s0_ptr, s1_ptr;
158 
159  switch (s->par_m_source) {
160  case 0: mid = src[0]; break;
161  case 1: mid = src[1]; break;
162  case 2: mid = (src[0] + src[1]) * 0.5; break;
163  case 3: mid = (src[0] - src[1]) * 0.5; break;
164  }
165 
166  mid *= level_in;
167 
168  buffer[s->write_ptr] = mid;
169 
170  s0_ptr = (s->write_ptr + s->buffer_size - s->delay[0]) & mask;
171  s1_ptr = (s->write_ptr + s->buffer_size - s->delay[1]) & mask;
172 
173  if (s->par_middle_phase)
174  mid = -mid;
175 
176  side[0] = buffer[s0_ptr] * s->par_side_gain;
177  side[1] = buffer[s1_ptr] * s->par_side_gain;
178  side_l = side[0] * s->balance_l[0] - side[1] * s->balance_l[1];
179  side_r = side[1] * s->balance_r[1] - side[0] * s->balance_r[0];
180 
181  dst[0] = (mid + side_l) * level_out;
182  dst[1] = (mid + side_r) * level_out;
183 
184  s->write_ptr = (s->write_ptr + 1) & mask;
185  }
186 
187  if (out != in)
188  av_frame_free(&in);
189  return ff_filter_frame(outlink, out);
190 }
191 
192 static av_cold void uninit(AVFilterContext *ctx)
193 {
194  HaasContext *s = ctx->priv;
195 
196  av_freep(&s->buffer);
197  s->buffer_size = 0;
198 }
199 
200 static const AVFilterPad inputs[] = {
201  {
202  .name = "default",
203  .type = AVMEDIA_TYPE_AUDIO,
204  .filter_frame = filter_frame,
205  .config_props = config_input,
206  },
207 };
208 
209 const AVFilter ff_af_haas = {
210  .name = "haas",
211  .description = NULL_IF_CONFIG_SMALL("Apply Haas Stereo Enhancer."),
212  .priv_size = sizeof(HaasContext),
213  .priv_class = &haas_class,
214  .uninit = uninit,
215  FILTER_INPUTS(inputs),
216  FILTER_OUTPUTS(ff_audio_default_filterpad),
217  FILTER_QUERY_FUNC(query_formats),
218 };
formats
formats
Definition: signature.h:48
HaasContext::par_delay0
double par_delay0
Definition: af_haas.c:33
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:97
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
config_input
static int config_input(AVFilterLink *inlink)
Definition: af_haas.c:97
AVERROR
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
opt.h
out
FILE * out
Definition: movenc.c:54
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:379
HaasContext::level_out
double level_out
Definition: af_haas.c:44
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1018
A
#define A
Definition: af_haas.c:57
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_haas.c:82
HaasContext::par_delay1
double par_delay1
Definition: af_haas.c:34
inlink
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
Definition: filter_design.txt:212
HaasContext::buffer
double * buffer
Definition: af_haas.c:46
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:130
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:344
AVOption
AVOption.
Definition: opt.h:346
HaasContext::balance_l
double balance_l[2]
Definition: af_haas.c:50
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
ff_set_common_all_samplerates
int ff_set_common_all_samplerates(AVFilterContext *ctx)
Equivalent to ff_set_common_samplerates(ctx, ff_all_samplerates())
Definition: formats.c:821
OFFSET
#define OFFSET(x)
Definition: af_haas.c:56
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_haas.c:129
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:365
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
HaasContext::write_ptr
uint32_t write_ptr
Definition: af_haas.c:48
MAX_HAAS_DELAY
#define MAX_HAAS_DELAY
Definition: af_haas.c:27
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
av_cold
#define av_cold
Definition: attributes.h:90
ff_set_common_formats
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:867
mask
static const uint16_t mask[17]
Definition: lzw.c:38
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:237
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ctx
AVFormatContext * ctx
Definition: movenc.c:48
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
if
if(ret)
Definition: filter_design.txt:179
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:679
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(haas)
HaasContext::par_middle_phase
int par_middle_phase
Definition: af_haas.c:37
ff_add_format
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:504
ff_audio_default_filterpad
const AVFilterPad ff_audio_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO.
Definition: audio.c:33
HaasContext::par_m_source
int par_m_source
Definition: af_haas.c:32
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:521
HaasContext::par_phase1
int par_phase1
Definition: af_haas.c:36
ff_af_haas
const AVFilter ff_af_haas
Definition: af_haas.c:209
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:303
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:615
layout
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 layout
Definition: filter_design.txt:18
HaasContext::par_balance1
double par_balance1
Definition: af_haas.c:42
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:424
HaasContext::delay
uint32_t delay[2]
Definition: af_haas.c:49
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
HaasContext::phase0
double phase0
Definition: af_haas.c:52
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
AVFilter
Filter definition.
Definition: avfilter.h:166
HaasContext::par_side_gain
double par_side_gain
Definition: af_haas.c:38
ret
ret
Definition: filter_design.txt:187
HaasContext::par_balance0
double par_balance0
Definition: af_haas.c:41
channel_layout.h
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:235
avfilter.h
HaasContext::balance_r
double balance_r[2]
Definition: af_haas.c:51
HaasContext::par_gain0
double par_gain0
Definition: af_haas.c:39
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
audio.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_haas.c:192
inputs
static const AVFilterPad inputs[]
Definition: af_haas.c:200
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:251
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
HaasContext::phase1
double phase1
Definition: af_haas.c:53
HaasContext::par_phase0
int par_phase0
Definition: af_haas.c:35
haas_options
static const AVOption haas_options[]
Definition: af_haas.c:59
HaasContext
Definition: af_haas.c:29
HaasContext::buffer_size
size_t buffer_size
Definition: af_haas.c:47
AV_SAMPLE_FMT_DBL
@ AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:61
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:244
HaasContext::par_gain1
double par_gain1
Definition: af_haas.c:40
HaasContext::level_in
double level_in
Definition: af_haas.c:43
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
Helpers for query_formats() which set all free audio links to the same list of channel layouts/sample...
Definition: formats.c:790
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