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2ba45a60 DM |
1 | /* |
2 | * ALSA input and output | |
3 | * Copyright (c) 2007 Luca Abeni ( lucabe72 email it ) | |
4 | * Copyright (c) 2007 Benoit Fouet ( benoit fouet free fr ) | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * ALSA input and output: common code | |
26 | * @author Luca Abeni ( lucabe72 email it ) | |
27 | * @author Benoit Fouet ( benoit fouet free fr ) | |
28 | * @author Nicolas George ( nicolas george normalesup org ) | |
29 | */ | |
30 | ||
31 | #include <alsa/asoundlib.h> | |
32 | #include "avdevice.h" | |
33 | #include "libavutil/avassert.h" | |
34 | #include "libavutil/channel_layout.h" | |
35 | ||
36 | #include "alsa-audio.h" | |
37 | ||
38 | static av_cold snd_pcm_format_t codec_id_to_pcm_format(int codec_id) | |
39 | { | |
40 | switch(codec_id) { | |
41 | case AV_CODEC_ID_PCM_F64LE: return SND_PCM_FORMAT_FLOAT64_LE; | |
42 | case AV_CODEC_ID_PCM_F64BE: return SND_PCM_FORMAT_FLOAT64_BE; | |
43 | case AV_CODEC_ID_PCM_F32LE: return SND_PCM_FORMAT_FLOAT_LE; | |
44 | case AV_CODEC_ID_PCM_F32BE: return SND_PCM_FORMAT_FLOAT_BE; | |
45 | case AV_CODEC_ID_PCM_S32LE: return SND_PCM_FORMAT_S32_LE; | |
46 | case AV_CODEC_ID_PCM_S32BE: return SND_PCM_FORMAT_S32_BE; | |
47 | case AV_CODEC_ID_PCM_U32LE: return SND_PCM_FORMAT_U32_LE; | |
48 | case AV_CODEC_ID_PCM_U32BE: return SND_PCM_FORMAT_U32_BE; | |
49 | case AV_CODEC_ID_PCM_S24LE: return SND_PCM_FORMAT_S24_3LE; | |
50 | case AV_CODEC_ID_PCM_S24BE: return SND_PCM_FORMAT_S24_3BE; | |
51 | case AV_CODEC_ID_PCM_U24LE: return SND_PCM_FORMAT_U24_3LE; | |
52 | case AV_CODEC_ID_PCM_U24BE: return SND_PCM_FORMAT_U24_3BE; | |
53 | case AV_CODEC_ID_PCM_S16LE: return SND_PCM_FORMAT_S16_LE; | |
54 | case AV_CODEC_ID_PCM_S16BE: return SND_PCM_FORMAT_S16_BE; | |
55 | case AV_CODEC_ID_PCM_U16LE: return SND_PCM_FORMAT_U16_LE; | |
56 | case AV_CODEC_ID_PCM_U16BE: return SND_PCM_FORMAT_U16_BE; | |
57 | case AV_CODEC_ID_PCM_S8: return SND_PCM_FORMAT_S8; | |
58 | case AV_CODEC_ID_PCM_U8: return SND_PCM_FORMAT_U8; | |
59 | case AV_CODEC_ID_PCM_MULAW: return SND_PCM_FORMAT_MU_LAW; | |
60 | case AV_CODEC_ID_PCM_ALAW: return SND_PCM_FORMAT_A_LAW; | |
61 | default: return SND_PCM_FORMAT_UNKNOWN; | |
62 | } | |
63 | } | |
64 | ||
65 | #define MAKE_REORDER_FUNC(NAME, TYPE, CHANNELS, LAYOUT, MAP) \ | |
66 | static void alsa_reorder_ ## NAME ## _ ## LAYOUT(const void *in_v, \ | |
67 | void *out_v, \ | |
68 | int n) \ | |
69 | { \ | |
70 | const TYPE *in = in_v; \ | |
71 | TYPE *out = out_v; \ | |
72 | \ | |
73 | while (n-- > 0) { \ | |
74 | MAP \ | |
75 | in += CHANNELS; \ | |
76 | out += CHANNELS; \ | |
77 | } \ | |
78 | } | |
79 | ||
80 | #define MAKE_REORDER_FUNCS(CHANNELS, LAYOUT, MAP) \ | |
81 | MAKE_REORDER_FUNC(int8, int8_t, CHANNELS, LAYOUT, MAP) \ | |
82 | MAKE_REORDER_FUNC(int16, int16_t, CHANNELS, LAYOUT, MAP) \ | |
83 | MAKE_REORDER_FUNC(int32, int32_t, CHANNELS, LAYOUT, MAP) \ | |
84 | MAKE_REORDER_FUNC(f32, float, CHANNELS, LAYOUT, MAP) | |
85 | ||
86 | MAKE_REORDER_FUNCS(5, out_50, \ | |
87 | out[0] = in[0]; \ | |
88 | out[1] = in[1]; \ | |
89 | out[2] = in[3]; \ | |
90 | out[3] = in[4]; \ | |
91 | out[4] = in[2]; \ | |
92 | ); | |
93 | ||
94 | MAKE_REORDER_FUNCS(6, out_51, \ | |
95 | out[0] = in[0]; \ | |
96 | out[1] = in[1]; \ | |
97 | out[2] = in[4]; \ | |
98 | out[3] = in[5]; \ | |
99 | out[4] = in[2]; \ | |
100 | out[5] = in[3]; \ | |
101 | ); | |
102 | ||
103 | MAKE_REORDER_FUNCS(8, out_71, \ | |
104 | out[0] = in[0]; \ | |
105 | out[1] = in[1]; \ | |
106 | out[2] = in[4]; \ | |
107 | out[3] = in[5]; \ | |
108 | out[4] = in[2]; \ | |
109 | out[5] = in[3]; \ | |
110 | out[6] = in[6]; \ | |
111 | out[7] = in[7]; \ | |
112 | ); | |
113 | ||
114 | #define FORMAT_I8 0 | |
115 | #define FORMAT_I16 1 | |
116 | #define FORMAT_I32 2 | |
117 | #define FORMAT_F32 3 | |
118 | ||
119 | #define PICK_REORDER(layout)\ | |
120 | switch(format) {\ | |
121 | case FORMAT_I8: s->reorder_func = alsa_reorder_int8_out_ ##layout; break;\ | |
122 | case FORMAT_I16: s->reorder_func = alsa_reorder_int16_out_ ##layout; break;\ | |
123 | case FORMAT_I32: s->reorder_func = alsa_reorder_int32_out_ ##layout; break;\ | |
124 | case FORMAT_F32: s->reorder_func = alsa_reorder_f32_out_ ##layout; break;\ | |
125 | } | |
126 | ||
127 | static av_cold int find_reorder_func(AlsaData *s, int codec_id, uint64_t layout, int out) | |
128 | { | |
129 | int format; | |
130 | ||
131 | /* reordering input is not currently supported */ | |
132 | if (!out) | |
133 | return AVERROR(ENOSYS); | |
134 | ||
135 | /* reordering is not needed for QUAD or 2_2 layout */ | |
136 | if (layout == AV_CH_LAYOUT_QUAD || layout == AV_CH_LAYOUT_2_2) | |
137 | return 0; | |
138 | ||
139 | switch (codec_id) { | |
140 | case AV_CODEC_ID_PCM_S8: | |
141 | case AV_CODEC_ID_PCM_U8: | |
142 | case AV_CODEC_ID_PCM_ALAW: | |
143 | case AV_CODEC_ID_PCM_MULAW: format = FORMAT_I8; break; | |
144 | case AV_CODEC_ID_PCM_S16LE: | |
145 | case AV_CODEC_ID_PCM_S16BE: | |
146 | case AV_CODEC_ID_PCM_U16LE: | |
147 | case AV_CODEC_ID_PCM_U16BE: format = FORMAT_I16; break; | |
148 | case AV_CODEC_ID_PCM_S32LE: | |
149 | case AV_CODEC_ID_PCM_S32BE: | |
150 | case AV_CODEC_ID_PCM_U32LE: | |
151 | case AV_CODEC_ID_PCM_U32BE: format = FORMAT_I32; break; | |
152 | case AV_CODEC_ID_PCM_F32LE: | |
153 | case AV_CODEC_ID_PCM_F32BE: format = FORMAT_F32; break; | |
154 | default: return AVERROR(ENOSYS); | |
155 | } | |
156 | ||
157 | if (layout == AV_CH_LAYOUT_5POINT0_BACK || layout == AV_CH_LAYOUT_5POINT0) | |
158 | PICK_REORDER(50) | |
159 | else if (layout == AV_CH_LAYOUT_5POINT1_BACK || layout == AV_CH_LAYOUT_5POINT1) | |
160 | PICK_REORDER(51) | |
161 | else if (layout == AV_CH_LAYOUT_7POINT1) | |
162 | PICK_REORDER(71) | |
163 | ||
164 | return s->reorder_func ? 0 : AVERROR(ENOSYS); | |
165 | } | |
166 | ||
167 | av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode, | |
168 | unsigned int *sample_rate, | |
169 | int channels, enum AVCodecID *codec_id) | |
170 | { | |
171 | AlsaData *s = ctx->priv_data; | |
172 | const char *audio_device; | |
173 | int res, flags = 0; | |
174 | snd_pcm_format_t format; | |
175 | snd_pcm_t *h; | |
176 | snd_pcm_hw_params_t *hw_params; | |
177 | snd_pcm_uframes_t buffer_size, period_size; | |
178 | uint64_t layout = ctx->streams[0]->codec->channel_layout; | |
179 | ||
180 | if (ctx->filename[0] == 0) audio_device = "default"; | |
181 | else audio_device = ctx->filename; | |
182 | ||
183 | if (*codec_id == AV_CODEC_ID_NONE) | |
184 | *codec_id = DEFAULT_CODEC_ID; | |
185 | format = codec_id_to_pcm_format(*codec_id); | |
186 | if (format == SND_PCM_FORMAT_UNKNOWN) { | |
187 | av_log(ctx, AV_LOG_ERROR, "sample format 0x%04x is not supported\n", *codec_id); | |
188 | return AVERROR(ENOSYS); | |
189 | } | |
190 | s->frame_size = av_get_bits_per_sample(*codec_id) / 8 * channels; | |
191 | ||
192 | if (ctx->flags & AVFMT_FLAG_NONBLOCK) { | |
193 | flags = SND_PCM_NONBLOCK; | |
194 | } | |
195 | res = snd_pcm_open(&h, audio_device, mode, flags); | |
196 | if (res < 0) { | |
197 | av_log(ctx, AV_LOG_ERROR, "cannot open audio device %s (%s)\n", | |
198 | audio_device, snd_strerror(res)); | |
199 | return AVERROR(EIO); | |
200 | } | |
201 | ||
202 | res = snd_pcm_hw_params_malloc(&hw_params); | |
203 | if (res < 0) { | |
204 | av_log(ctx, AV_LOG_ERROR, "cannot allocate hardware parameter structure (%s)\n", | |
205 | snd_strerror(res)); | |
206 | goto fail1; | |
207 | } | |
208 | ||
209 | res = snd_pcm_hw_params_any(h, hw_params); | |
210 | if (res < 0) { | |
211 | av_log(ctx, AV_LOG_ERROR, "cannot initialize hardware parameter structure (%s)\n", | |
212 | snd_strerror(res)); | |
213 | goto fail; | |
214 | } | |
215 | ||
216 | res = snd_pcm_hw_params_set_access(h, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); | |
217 | if (res < 0) { | |
218 | av_log(ctx, AV_LOG_ERROR, "cannot set access type (%s)\n", | |
219 | snd_strerror(res)); | |
220 | goto fail; | |
221 | } | |
222 | ||
223 | res = snd_pcm_hw_params_set_format(h, hw_params, format); | |
224 | if (res < 0) { | |
225 | av_log(ctx, AV_LOG_ERROR, "cannot set sample format 0x%04x %d (%s)\n", | |
226 | *codec_id, format, snd_strerror(res)); | |
227 | goto fail; | |
228 | } | |
229 | ||
230 | res = snd_pcm_hw_params_set_rate_near(h, hw_params, sample_rate, 0); | |
231 | if (res < 0) { | |
232 | av_log(ctx, AV_LOG_ERROR, "cannot set sample rate (%s)\n", | |
233 | snd_strerror(res)); | |
234 | goto fail; | |
235 | } | |
236 | ||
237 | res = snd_pcm_hw_params_set_channels(h, hw_params, channels); | |
238 | if (res < 0) { | |
239 | av_log(ctx, AV_LOG_ERROR, "cannot set channel count to %d (%s)\n", | |
240 | channels, snd_strerror(res)); | |
241 | goto fail; | |
242 | } | |
243 | ||
244 | snd_pcm_hw_params_get_buffer_size_max(hw_params, &buffer_size); | |
245 | buffer_size = FFMIN(buffer_size, ALSA_BUFFER_SIZE_MAX); | |
246 | /* TODO: maybe use ctx->max_picture_buffer somehow */ | |
247 | res = snd_pcm_hw_params_set_buffer_size_near(h, hw_params, &buffer_size); | |
248 | if (res < 0) { | |
249 | av_log(ctx, AV_LOG_ERROR, "cannot set ALSA buffer size (%s)\n", | |
250 | snd_strerror(res)); | |
251 | goto fail; | |
252 | } | |
253 | ||
254 | snd_pcm_hw_params_get_period_size_min(hw_params, &period_size, NULL); | |
255 | if (!period_size) | |
256 | period_size = buffer_size / 4; | |
257 | res = snd_pcm_hw_params_set_period_size_near(h, hw_params, &period_size, NULL); | |
258 | if (res < 0) { | |
259 | av_log(ctx, AV_LOG_ERROR, "cannot set ALSA period size (%s)\n", | |
260 | snd_strerror(res)); | |
261 | goto fail; | |
262 | } | |
263 | s->period_size = period_size; | |
264 | ||
265 | res = snd_pcm_hw_params(h, hw_params); | |
266 | if (res < 0) { | |
267 | av_log(ctx, AV_LOG_ERROR, "cannot set parameters (%s)\n", | |
268 | snd_strerror(res)); | |
269 | goto fail; | |
270 | } | |
271 | ||
272 | snd_pcm_hw_params_free(hw_params); | |
273 | ||
274 | if (channels > 2 && layout) { | |
275 | if (find_reorder_func(s, *codec_id, layout, mode == SND_PCM_STREAM_PLAYBACK) < 0) { | |
276 | char name[128]; | |
277 | av_get_channel_layout_string(name, sizeof(name), channels, layout); | |
278 | av_log(ctx, AV_LOG_WARNING, "ALSA channel layout unknown or unimplemented for %s %s.\n", | |
279 | name, mode == SND_PCM_STREAM_PLAYBACK ? "playback" : "capture"); | |
280 | } | |
281 | if (s->reorder_func) { | |
282 | s->reorder_buf_size = buffer_size; | |
283 | s->reorder_buf = av_malloc(s->reorder_buf_size * s->frame_size); | |
284 | if (!s->reorder_buf) | |
285 | goto fail1; | |
286 | } | |
287 | } | |
288 | ||
289 | s->h = h; | |
290 | return 0; | |
291 | ||
292 | fail: | |
293 | snd_pcm_hw_params_free(hw_params); | |
294 | fail1: | |
295 | snd_pcm_close(h); | |
296 | return AVERROR(EIO); | |
297 | } | |
298 | ||
299 | av_cold int ff_alsa_close(AVFormatContext *s1) | |
300 | { | |
301 | AlsaData *s = s1->priv_data; | |
302 | ||
303 | av_freep(&s->reorder_buf); | |
304 | if (CONFIG_ALSA_INDEV) | |
305 | ff_timefilter_destroy(s->timefilter); | |
306 | snd_pcm_close(s->h); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | int ff_alsa_xrun_recover(AVFormatContext *s1, int err) | |
311 | { | |
312 | AlsaData *s = s1->priv_data; | |
313 | snd_pcm_t *handle = s->h; | |
314 | ||
315 | av_log(s1, AV_LOG_WARNING, "ALSA buffer xrun.\n"); | |
316 | if (err == -EPIPE) { | |
317 | err = snd_pcm_prepare(handle); | |
318 | if (err < 0) { | |
319 | av_log(s1, AV_LOG_ERROR, "cannot recover from underrun (snd_pcm_prepare failed: %s)\n", snd_strerror(err)); | |
320 | ||
321 | return AVERROR(EIO); | |
322 | } | |
323 | } else if (err == -ESTRPIPE) { | |
324 | av_log(s1, AV_LOG_ERROR, "-ESTRPIPE... Unsupported!\n"); | |
325 | ||
326 | return -1; | |
327 | } | |
328 | return err; | |
329 | } | |
330 | ||
331 | int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size) | |
332 | { | |
333 | int size = s->reorder_buf_size; | |
334 | void *r; | |
335 | ||
336 | av_assert0(size != 0); | |
337 | while (size < min_size) | |
338 | size *= 2; | |
339 | r = av_realloc(s->reorder_buf, size * s->frame_size); | |
340 | if (!r) | |
341 | return AVERROR(ENOMEM); | |
342 | s->reorder_buf = r; | |
343 | s->reorder_buf_size = size; | |
344 | return 0; | |
345 | } | |
f6fa7814 DM |
346 | |
347 | /* ported from alsa-utils/aplay.c */ | |
348 | int ff_alsa_get_device_list(AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type) | |
349 | { | |
350 | int ret = 0; | |
351 | void **hints, **n; | |
352 | char *name = NULL, *descr = NULL, *io = NULL, *tmp; | |
353 | AVDeviceInfo *new_device = NULL; | |
354 | const char *filter = stream_type == SND_PCM_STREAM_PLAYBACK ? "Output" : "Input"; | |
355 | ||
356 | if (snd_device_name_hint(-1, "pcm", &hints) < 0) | |
357 | return AVERROR_EXTERNAL; | |
358 | n = hints; | |
359 | while (*n && !ret) { | |
360 | name = snd_device_name_get_hint(*n, "NAME"); | |
361 | descr = snd_device_name_get_hint(*n, "DESC"); | |
362 | io = snd_device_name_get_hint(*n, "IOID"); | |
363 | if (!io || !strcmp(io, filter)) { | |
364 | new_device = av_mallocz(sizeof(AVDeviceInfo)); | |
365 | if (!new_device) { | |
366 | ret = AVERROR(ENOMEM); | |
367 | goto fail; | |
368 | } | |
369 | new_device->device_name = av_strdup(name); | |
370 | if ((tmp = strrchr(descr, '\n')) && tmp[1]) | |
371 | new_device->device_description = av_strdup(&tmp[1]); | |
372 | else | |
373 | new_device->device_description = av_strdup(descr); | |
374 | if (!new_device->device_description || !new_device->device_name) { | |
375 | ret = AVERROR(ENOMEM); | |
376 | goto fail; | |
377 | } | |
378 | if ((ret = av_dynarray_add_nofree(&device_list->devices, | |
379 | &device_list->nb_devices, new_device)) < 0) { | |
380 | goto fail; | |
381 | } | |
382 | new_device = NULL; | |
383 | } | |
384 | fail: | |
385 | free(io); | |
386 | free(name); | |
387 | free(descr); | |
388 | n++; | |
389 | } | |
390 | if (new_device) { | |
391 | av_free(new_device->device_description); | |
392 | av_free(new_device->device_name); | |
393 | av_free(new_device); | |
394 | } | |
395 | snd_device_name_free_hint(hints); | |
396 | return ret; | |
397 | } |