1 |
|
|
/* |
2 |
|
|
* Copyright (c) 2011 Nicolas George <nicolas.george@normalesup.org> |
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 |
14 |
|
|
* GNU 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 |
|
|
/** |
22 |
|
|
* @file |
23 |
|
|
* Audio merging filter |
24 |
|
|
*/ |
25 |
|
|
|
26 |
|
|
#include "libavutil/avstring.h" |
27 |
|
|
#include "libavutil/bprint.h" |
28 |
|
|
#include "libavutil/channel_layout.h" |
29 |
|
|
#include "libavutil/opt.h" |
30 |
|
|
#include "avfilter.h" |
31 |
|
|
#include "filters.h" |
32 |
|
|
#include "audio.h" |
33 |
|
|
#include "internal.h" |
34 |
|
|
|
35 |
|
|
#define SWR_CH_MAX 64 |
36 |
|
|
|
37 |
|
|
typedef struct AMergeContext { |
38 |
|
|
const AVClass *class; |
39 |
|
|
int nb_inputs; |
40 |
|
|
int route[SWR_CH_MAX]; /**< channels routing, see copy_samples */ |
41 |
|
|
int bps; |
42 |
|
|
struct amerge_input { |
43 |
|
|
int nb_ch; /**< number of channels for the input */ |
44 |
|
|
} *in; |
45 |
|
|
} AMergeContext; |
46 |
|
|
|
47 |
|
|
#define OFFSET(x) offsetof(AMergeContext, x) |
48 |
|
|
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
49 |
|
|
|
50 |
|
|
static const AVOption amerge_options[] = { |
51 |
|
|
{ "inputs", "specify the number of inputs", OFFSET(nb_inputs), |
52 |
|
|
AV_OPT_TYPE_INT, { .i64 = 2 }, 1, SWR_CH_MAX, FLAGS }, |
53 |
|
|
{ NULL } |
54 |
|
|
}; |
55 |
|
|
|
56 |
|
|
AVFILTER_DEFINE_CLASS(amerge); |
57 |
|
|
|
58 |
|
2 |
static av_cold void uninit(AVFilterContext *ctx) |
59 |
|
|
{ |
60 |
|
2 |
AMergeContext *s = ctx->priv; |
61 |
|
|
int i; |
62 |
|
|
|
63 |
✓✓ |
6 |
for (i = 0; i < s->nb_inputs; i++) { |
64 |
✓✗ |
4 |
if (ctx->input_pads) |
65 |
|
4 |
av_freep(&ctx->input_pads[i].name); |
66 |
|
|
} |
67 |
|
2 |
av_freep(&s->in); |
68 |
|
2 |
} |
69 |
|
|
|
70 |
|
2 |
static int query_formats(AVFilterContext *ctx) |
71 |
|
|
{ |
72 |
|
2 |
AMergeContext *s = ctx->priv; |
73 |
|
2 |
int64_t inlayout[SWR_CH_MAX], outlayout = 0; |
74 |
|
|
AVFilterFormats *formats; |
75 |
|
|
AVFilterChannelLayouts *layouts; |
76 |
|
2 |
int i, ret, overlap = 0, nb_ch = 0; |
77 |
|
|
|
78 |
✓✓ |
4 |
for (i = 0; i < s->nb_inputs; i++) { |
79 |
✓✓ |
3 |
if (!ctx->inputs[i]->in_channel_layouts || |
80 |
✗✓ |
2 |
!ctx->inputs[i]->in_channel_layouts->nb_channel_layouts) { |
81 |
|
1 |
av_log(ctx, AV_LOG_WARNING, |
82 |
|
|
"No channel layout for input %d\n", i + 1); |
83 |
|
1 |
return AVERROR(EAGAIN); |
84 |
|
|
} |
85 |
|
2 |
inlayout[i] = ctx->inputs[i]->in_channel_layouts->channel_layouts[0]; |
86 |
✗✓ |
2 |
if (ctx->inputs[i]->in_channel_layouts->nb_channel_layouts > 1) { |
87 |
|
|
char buf[256]; |
88 |
|
|
av_get_channel_layout_string(buf, sizeof(buf), 0, inlayout[i]); |
89 |
|
|
av_log(ctx, AV_LOG_INFO, "Using \"%s\" for input %d\n", buf, i + 1); |
90 |
|
|
} |
91 |
✗✓ |
2 |
s->in[i].nb_ch = FF_LAYOUT2COUNT(inlayout[i]); |
92 |
✗✓ |
2 |
if (s->in[i].nb_ch) { |
93 |
|
|
overlap++; |
94 |
|
|
} else { |
95 |
|
2 |
s->in[i].nb_ch = av_get_channel_layout_nb_channels(inlayout[i]); |
96 |
✓✓ |
2 |
if (outlayout & inlayout[i]) |
97 |
|
1 |
overlap++; |
98 |
|
2 |
outlayout |= inlayout[i]; |
99 |
|
|
} |
100 |
|
2 |
nb_ch += s->in[i].nb_ch; |
101 |
|
|
} |
102 |
✗✓ |
1 |
if (nb_ch > SWR_CH_MAX) { |
103 |
|
|
av_log(ctx, AV_LOG_ERROR, "Too many channels (max %d)\n", SWR_CH_MAX); |
104 |
|
|
return AVERROR(EINVAL); |
105 |
|
|
} |
106 |
✓✗ |
1 |
if (overlap) { |
107 |
|
1 |
av_log(ctx, AV_LOG_WARNING, |
108 |
|
|
"Input channel layouts overlap: " |
109 |
|
|
"output layout will be determined by the number of distinct input channels\n"); |
110 |
✓✓ |
3 |
for (i = 0; i < nb_ch; i++) |
111 |
|
2 |
s->route[i] = i; |
112 |
|
1 |
outlayout = av_get_default_channel_layout(nb_ch); |
113 |
✗✓✗✗
|
1 |
if (!outlayout && nb_ch) |
114 |
|
|
outlayout = 0xFFFFFFFFFFFFFFFFULL >> (64 - nb_ch); |
115 |
|
|
} else { |
116 |
|
|
int *route[SWR_CH_MAX]; |
117 |
|
|
int c, out_ch_number = 0; |
118 |
|
|
|
119 |
|
|
route[0] = s->route; |
120 |
|
|
for (i = 1; i < s->nb_inputs; i++) |
121 |
|
|
route[i] = route[i - 1] + s->in[i - 1].nb_ch; |
122 |
|
|
for (c = 0; c < 64; c++) |
123 |
|
|
for (i = 0; i < s->nb_inputs; i++) |
124 |
|
|
if ((inlayout[i] >> c) & 1) |
125 |
|
|
*(route[i]++) = out_ch_number++; |
126 |
|
|
} |
127 |
|
1 |
formats = ff_make_format_list(ff_packed_sample_fmts_array); |
128 |
✗✓ |
1 |
if ((ret = ff_set_common_formats(ctx, formats)) < 0) |
129 |
|
|
return ret; |
130 |
✓✓ |
3 |
for (i = 0; i < s->nb_inputs; i++) { |
131 |
|
2 |
layouts = NULL; |
132 |
✗✓ |
2 |
if ((ret = ff_add_channel_layout(&layouts, inlayout[i])) < 0) |
133 |
|
|
return ret; |
134 |
✗✓ |
2 |
if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[i]->out_channel_layouts)) < 0) |
135 |
|
|
return ret; |
136 |
|
|
} |
137 |
|
1 |
layouts = NULL; |
138 |
✗✓ |
1 |
if ((ret = ff_add_channel_layout(&layouts, outlayout)) < 0) |
139 |
|
|
return ret; |
140 |
✗✓ |
1 |
if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->in_channel_layouts)) < 0) |
141 |
|
|
return ret; |
142 |
|
|
|
143 |
|
1 |
return ff_set_common_samplerates(ctx, ff_all_samplerates()); |
144 |
|
|
} |
145 |
|
|
|
146 |
|
1 |
static int config_output(AVFilterLink *outlink) |
147 |
|
|
{ |
148 |
|
1 |
AVFilterContext *ctx = outlink->src; |
149 |
|
1 |
AMergeContext *s = ctx->priv; |
150 |
|
|
AVBPrint bp; |
151 |
|
|
int i; |
152 |
|
|
|
153 |
✓✓ |
2 |
for (i = 1; i < s->nb_inputs; i++) { |
154 |
✗✓ |
1 |
if (ctx->inputs[i]->sample_rate != ctx->inputs[0]->sample_rate) { |
155 |
|
|
av_log(ctx, AV_LOG_ERROR, |
156 |
|
|
"Inputs must have the same sample rate " |
157 |
|
|
"%d for in%d vs %d\n", |
158 |
|
|
ctx->inputs[i]->sample_rate, i, ctx->inputs[0]->sample_rate); |
159 |
|
|
return AVERROR(EINVAL); |
160 |
|
|
} |
161 |
|
|
} |
162 |
|
1 |
s->bps = av_get_bytes_per_sample(ctx->outputs[0]->format); |
163 |
|
1 |
outlink->sample_rate = ctx->inputs[0]->sample_rate; |
164 |
|
1 |
outlink->time_base = ctx->inputs[0]->time_base; |
165 |
|
|
|
166 |
|
1 |
av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC); |
167 |
✓✓ |
3 |
for (i = 0; i < s->nb_inputs; i++) { |
168 |
✓✓ |
2 |
av_bprintf(&bp, "%sin%d:", i ? " + " : "", i); |
169 |
|
2 |
av_bprint_channel_layout(&bp, -1, ctx->inputs[i]->channel_layout); |
170 |
|
|
} |
171 |
|
1 |
av_bprintf(&bp, " -> out:"); |
172 |
|
1 |
av_bprint_channel_layout(&bp, -1, ctx->outputs[0]->channel_layout); |
173 |
|
1 |
av_log(ctx, AV_LOG_VERBOSE, "%s\n", bp.str); |
174 |
|
|
|
175 |
|
1 |
return 0; |
176 |
|
|
} |
177 |
|
|
|
178 |
|
|
/** |
179 |
|
|
* Copy samples from several input streams to one output stream. |
180 |
|
|
* @param nb_inputs number of inputs |
181 |
|
|
* @param in inputs; used only for the nb_ch field; |
182 |
|
|
* @param route routing values; |
183 |
|
|
* input channel i goes to output channel route[i]; |
184 |
|
|
* i < in[0].nb_ch are the channels from the first output; |
185 |
|
|
* i >= in[0].nb_ch are the channels from the second output |
186 |
|
|
* @param ins pointer to the samples of each inputs, in packed format; |
187 |
|
|
* will be left at the end of the copied samples |
188 |
|
|
* @param outs pointer to the samples of the output, in packet format; |
189 |
|
|
* must point to a buffer big enough; |
190 |
|
|
* will be left at the end of the copied samples |
191 |
|
|
* @param ns number of samples to copy |
192 |
|
|
* @param bps bytes per sample |
193 |
|
|
*/ |
194 |
|
130 |
static inline void copy_samples(int nb_inputs, struct amerge_input in[], |
195 |
|
|
int *route, uint8_t *ins[], |
196 |
|
|
uint8_t **outs, int ns, int bps) |
197 |
|
|
{ |
198 |
|
|
int *route_cur; |
199 |
|
130 |
int i, c, nb_ch = 0; |
200 |
|
|
|
201 |
✓✓ |
390 |
for (i = 0; i < nb_inputs; i++) |
202 |
|
260 |
nb_ch += in[i].nb_ch; |
203 |
✓✓ |
264730 |
while (ns--) { |
204 |
|
264600 |
route_cur = route; |
205 |
✓✓ |
793800 |
for (i = 0; i < nb_inputs; i++) { |
206 |
✓✓ |
1058400 |
for (c = 0; c < in[i].nb_ch; c++) { |
207 |
|
529200 |
memcpy((*outs) + bps * *(route_cur++), ins[i], bps); |
208 |
|
529200 |
ins[i] += bps; |
209 |
|
|
} |
210 |
|
|
} |
211 |
|
264600 |
*outs += nb_ch * bps; |
212 |
|
|
} |
213 |
|
130 |
} |
214 |
|
|
|
215 |
|
130 |
static void free_frames(int nb_inputs, AVFrame **input_frames) |
216 |
|
|
{ |
217 |
|
|
int i; |
218 |
✓✓ |
390 |
for (i = 0; i < nb_inputs; i++) |
219 |
|
260 |
av_frame_free(&input_frames[i]); |
220 |
|
130 |
} |
221 |
|
|
|
222 |
|
130 |
static int try_push_frame(AVFilterContext *ctx, int nb_samples) |
223 |
|
|
{ |
224 |
|
130 |
AMergeContext *s = ctx->priv; |
225 |
|
130 |
AVFilterLink *outlink = ctx->outputs[0]; |
226 |
|
|
int i, ret; |
227 |
|
130 |
AVFrame *outbuf, *inbuf[SWR_CH_MAX] = { NULL }; |
228 |
|
|
uint8_t *outs, *ins[SWR_CH_MAX]; |
229 |
|
|
|
230 |
✓✓ |
390 |
for (i = 0; i < ctx->nb_inputs; i++) { |
231 |
|
260 |
ret = ff_inlink_consume_samples(ctx->inputs[i], nb_samples, nb_samples, &inbuf[i]); |
232 |
✗✓ |
260 |
if (ret < 0) { |
233 |
|
|
free_frames(i, inbuf); |
234 |
|
|
return ret; |
235 |
|
|
} |
236 |
|
260 |
ins[i] = inbuf[i]->data[0]; |
237 |
|
|
} |
238 |
|
|
|
239 |
|
130 |
outbuf = ff_get_audio_buffer(ctx->outputs[0], nb_samples); |
240 |
✗✓ |
130 |
if (!outbuf) { |
241 |
|
|
free_frames(s->nb_inputs, inbuf); |
242 |
|
|
return AVERROR(ENOMEM); |
243 |
|
|
} |
244 |
|
|
|
245 |
|
130 |
outs = outbuf->data[0]; |
246 |
|
130 |
outbuf->pts = inbuf[0]->pts; |
247 |
|
|
|
248 |
|
130 |
outbuf->nb_samples = nb_samples; |
249 |
|
130 |
outbuf->channel_layout = outlink->channel_layout; |
250 |
|
130 |
outbuf->channels = outlink->channels; |
251 |
|
|
|
252 |
✓✓ |
260 |
while (nb_samples) { |
253 |
|
|
/* Unroll the most common sample formats: speed +~350% for the loop, |
254 |
|
|
+~13% overall (including two common decoders) */ |
255 |
✗✓✗✗
|
130 |
switch (s->bps) { |
256 |
|
|
case 1: |
257 |
|
|
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 1); |
258 |
|
|
break; |
259 |
|
130 |
case 2: |
260 |
|
130 |
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 2); |
261 |
|
130 |
break; |
262 |
|
|
case 4: |
263 |
|
|
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, 4); |
264 |
|
|
break; |
265 |
|
|
default: |
266 |
|
|
copy_samples(s->nb_inputs, s->in, s->route, ins, &outs, nb_samples, s->bps); |
267 |
|
|
break; |
268 |
|
|
} |
269 |
|
|
|
270 |
|
130 |
nb_samples = 0; |
271 |
|
|
} |
272 |
|
|
|
273 |
|
130 |
free_frames(s->nb_inputs, inbuf); |
274 |
|
130 |
return ff_filter_frame(ctx->outputs[0], outbuf); |
275 |
|
|
} |
276 |
|
|
|
277 |
|
391 |
static int activate(AVFilterContext *ctx) |
278 |
|
|
{ |
279 |
|
|
int i, status; |
280 |
|
|
int ret, nb_samples; |
281 |
|
|
int64_t pts; |
282 |
|
|
|
283 |
✓✓✓✓
|
393 |
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx); |
284 |
|
|
|
285 |
|
390 |
nb_samples = ff_inlink_queued_samples(ctx->inputs[0]); |
286 |
✓✓✓✓
|
649 |
for (i = 1; i < ctx->nb_inputs && nb_samples > 0; i++) { |
287 |
✓✗ |
259 |
nb_samples = FFMIN(ff_inlink_queued_samples(ctx->inputs[i]), nb_samples); |
288 |
|
|
} |
289 |
|
|
|
290 |
✓✓ |
390 |
if (nb_samples) { |
291 |
|
130 |
ret = try_push_frame(ctx, nb_samples); |
292 |
✗✓ |
130 |
if (ret < 0) |
293 |
|
|
return ret; |
294 |
|
|
} |
295 |
|
|
|
296 |
✓✓ |
779 |
for (i = 0; i < ctx->nb_inputs; i++) { |
297 |
✓✓ |
649 |
if (ff_inlink_queued_samples(ctx->inputs[i])) |
298 |
|
129 |
continue; |
299 |
|
|
|
300 |
✓✓ |
520 |
if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) { |
301 |
|
1 |
ff_outlink_set_status(ctx->outputs[0], status, pts); |
302 |
|
1 |
return 0; |
303 |
✓✓ |
519 |
} else if (ff_outlink_frame_wanted(ctx->outputs[0])) { |
304 |
|
259 |
ff_inlink_request_frame(ctx->inputs[i]); |
305 |
|
259 |
return 0; |
306 |
|
|
} |
307 |
|
|
} |
308 |
|
|
|
309 |
|
130 |
return 0; |
310 |
|
|
} |
311 |
|
|
|
312 |
|
2 |
static av_cold int init(AVFilterContext *ctx) |
313 |
|
|
{ |
314 |
|
2 |
AMergeContext *s = ctx->priv; |
315 |
|
|
int i, ret; |
316 |
|
|
|
317 |
|
2 |
s->in = av_calloc(s->nb_inputs, sizeof(*s->in)); |
318 |
✗✓ |
2 |
if (!s->in) |
319 |
|
|
return AVERROR(ENOMEM); |
320 |
✓✓ |
6 |
for (i = 0; i < s->nb_inputs; i++) { |
321 |
|
4 |
char *name = av_asprintf("in%d", i); |
322 |
|
4 |
AVFilterPad pad = { |
323 |
|
|
.name = name, |
324 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
325 |
|
|
}; |
326 |
✗✓ |
4 |
if (!name) |
327 |
|
|
return AVERROR(ENOMEM); |
328 |
✗✓ |
4 |
if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) { |
329 |
|
|
av_freep(&pad.name); |
330 |
|
|
return ret; |
331 |
|
|
} |
332 |
|
|
} |
333 |
|
2 |
return 0; |
334 |
|
|
} |
335 |
|
|
|
336 |
|
|
static const AVFilterPad amerge_outputs[] = { |
337 |
|
|
{ |
338 |
|
|
.name = "default", |
339 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
340 |
|
|
.config_props = config_output, |
341 |
|
|
}, |
342 |
|
|
{ NULL } |
343 |
|
|
}; |
344 |
|
|
|
345 |
|
|
AVFilter ff_af_amerge = { |
346 |
|
|
.name = "amerge", |
347 |
|
|
.description = NULL_IF_CONFIG_SMALL("Merge two or more audio streams into " |
348 |
|
|
"a single multi-channel stream."), |
349 |
|
|
.priv_size = sizeof(AMergeContext), |
350 |
|
|
.init = init, |
351 |
|
|
.uninit = uninit, |
352 |
|
|
.query_formats = query_formats, |
353 |
|
|
.activate = activate, |
354 |
|
|
.inputs = NULL, |
355 |
|
|
.outputs = amerge_outputs, |
356 |
|
|
.priv_class = &amerge_class, |
357 |
|
|
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS, |
358 |
|
|
}; |