FFmpeg coverage

Line	Branch	Exec	Source
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 "config_components.h"
32
33			#include <alsa/asoundlib.h>
34			#include "avdevice.h"
35			#include "libavutil/avassert.h"
36			#include "libavutil/channel_layout.h"
37			#include "libavutil/mem.h"
38
39			#include "alsa.h"
40
41		✗	static av_cold snd_pcm_format_t codec_id_to_pcm_format(int codec_id)
42			{
43		✗	switch(codec_id) {
44		✗	case AV_CODEC_ID_PCM_F64LE: return SND_PCM_FORMAT_FLOAT64_LE;
45		✗	case AV_CODEC_ID_PCM_F64BE: return SND_PCM_FORMAT_FLOAT64_BE;
46		✗	case AV_CODEC_ID_PCM_F32LE: return SND_PCM_FORMAT_FLOAT_LE;
47		✗	case AV_CODEC_ID_PCM_F32BE: return SND_PCM_FORMAT_FLOAT_BE;
48		✗	case AV_CODEC_ID_PCM_S32LE: return SND_PCM_FORMAT_S32_LE;
49		✗	case AV_CODEC_ID_PCM_S32BE: return SND_PCM_FORMAT_S32_BE;
50		✗	case AV_CODEC_ID_PCM_U32LE: return SND_PCM_FORMAT_U32_LE;
51		✗	case AV_CODEC_ID_PCM_U32BE: return SND_PCM_FORMAT_U32_BE;
52		✗	case AV_CODEC_ID_PCM_S24LE: return SND_PCM_FORMAT_S24_3LE;
53		✗	case AV_CODEC_ID_PCM_S24BE: return SND_PCM_FORMAT_S24_3BE;
54		✗	case AV_CODEC_ID_PCM_U24LE: return SND_PCM_FORMAT_U24_3LE;
55		✗	case AV_CODEC_ID_PCM_U24BE: return SND_PCM_FORMAT_U24_3BE;
56		✗	case AV_CODEC_ID_PCM_S16LE: return SND_PCM_FORMAT_S16_LE;
57		✗	case AV_CODEC_ID_PCM_S16BE: return SND_PCM_FORMAT_S16_BE;
58		✗	case AV_CODEC_ID_PCM_U16LE: return SND_PCM_FORMAT_U16_LE;
59		✗	case AV_CODEC_ID_PCM_U16BE: return SND_PCM_FORMAT_U16_BE;
60		✗	case AV_CODEC_ID_PCM_S8: return SND_PCM_FORMAT_S8;
61		✗	case AV_CODEC_ID_PCM_U8: return SND_PCM_FORMAT_U8;
62		✗	case AV_CODEC_ID_PCM_MULAW: return SND_PCM_FORMAT_MU_LAW;
63		✗	case AV_CODEC_ID_PCM_ALAW: return SND_PCM_FORMAT_A_LAW;
64		✗	default: return SND_PCM_FORMAT_UNKNOWN;
65			}
66			}
67
68			#define MAKE_REORDER_FUNC(NAME, TYPE, CHANNELS, LAYOUT, MAP) \
69			static void alsa_reorder_ ## NAME ## _ ## LAYOUT(const void *in_v, \
70			void *out_v, \
71			int n) \
72			{ \
73			const TYPE *in = in_v; \
74			TYPE *out = out_v; \
75			\
76			while (n-- > 0) { \
77			MAP \
78			in += CHANNELS; \
79			out += CHANNELS; \
80			} \
81			}
82
83			#define MAKE_REORDER_FUNCS(CHANNELS, LAYOUT, MAP) \
84			MAKE_REORDER_FUNC(int8, int8_t, CHANNELS, LAYOUT, MAP) \
85			MAKE_REORDER_FUNC(int16, int16_t, CHANNELS, LAYOUT, MAP) \
86			MAKE_REORDER_FUNC(int32, int32_t, CHANNELS, LAYOUT, MAP) \
87			MAKE_REORDER_FUNC(f32, float, CHANNELS, LAYOUT, MAP)
88
89		✗	MAKE_REORDER_FUNCS(5, out_50, \
90			out[0] = in[0]; \
91			out[1] = in[1]; \
92			out[2] = in[3]; \
93			out[3] = in[4]; \
94			out[4] = in[2]; \
95			)
96
97		✗	MAKE_REORDER_FUNCS(6, out_51, \
98			out[0] = in[0]; \
99			out[1] = in[1]; \
100			out[2] = in[4]; \
101			out[3] = in[5]; \
102			out[4] = in[2]; \
103			out[5] = in[3]; \
104			)
105
106		✗	MAKE_REORDER_FUNCS(8, out_71, \
107			out[0] = in[0]; \
108			out[1] = in[1]; \
109			out[2] = in[4]; \
110			out[3] = in[5]; \
111			out[4] = in[2]; \
112			out[5] = in[3]; \
113			out[6] = in[6]; \
114			out[7] = in[7]; \
115			)
116
117			#define FORMAT_I8 0
118			#define FORMAT_I16 1
119			#define FORMAT_I32 2
120			#define FORMAT_F32 3
121
122			#define PICK_REORDER(layout)\
123			switch(format) {\
124			case FORMAT_I8: s->reorder_func = alsa_reorder_int8_out_ ##layout; break;\
125			case FORMAT_I16: s->reorder_func = alsa_reorder_int16_out_ ##layout; break;\
126			case FORMAT_I32: s->reorder_func = alsa_reorder_int32_out_ ##layout; break;\
127			case FORMAT_F32: s->reorder_func = alsa_reorder_f32_out_ ##layout; break;\
128			}
129
130		✗	static av_cold int find_reorder_func(AlsaData *s, int codec_id,
131			const AVChannelLayout *layout, int out)
132			{
133			int format;
134
135			/* reordering input is not currently supported */
136		✗	if (!out)
137		✗	return AVERROR(ENOSYS);
138
139			/* reordering is not needed for QUAD or 2_2 layout */
140		✗	if (!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_QUAD) ||
141		✗	!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_2_2))
142		✗	return 0;
143
144		✗	switch (codec_id) {
145		✗	case AV_CODEC_ID_PCM_S8:
146			case AV_CODEC_ID_PCM_U8:
147			case AV_CODEC_ID_PCM_ALAW:
148		✗	case AV_CODEC_ID_PCM_MULAW: format = FORMAT_I8; break;
149		✗	case AV_CODEC_ID_PCM_S16LE:
150			case AV_CODEC_ID_PCM_S16BE:
151			case AV_CODEC_ID_PCM_U16LE:
152		✗	case AV_CODEC_ID_PCM_U16BE: format = FORMAT_I16; break;
153		✗	case AV_CODEC_ID_PCM_S32LE:
154			case AV_CODEC_ID_PCM_S32BE:
155			case AV_CODEC_ID_PCM_U32LE:
156		✗	case AV_CODEC_ID_PCM_U32BE: format = FORMAT_I32; break;
157		✗	case AV_CODEC_ID_PCM_F32LE:
158		✗	case AV_CODEC_ID_PCM_F32BE: format = FORMAT_F32; break;
159		✗	default: return AVERROR(ENOSYS);
160			}
161
162		✗	if (!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0_BACK) ||
163		✗	!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0))
164		✗	PICK_REORDER(50)
165		✗	else if (!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1_BACK) ||
166		✗	!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1))
167		✗	PICK_REORDER(51)
168		✗	else if (!av_channel_layout_compare(layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1))
169		✗	PICK_REORDER(71)
170
171		✗	return s->reorder_func ? 0 : AVERROR(ENOSYS);
172			}
173
174		✗	av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode,
175			unsigned int *sample_rate,
176			const AVChannelLayout *layout, enum AVCodecID *codec_id)
177			{
178		✗	AlsaData *s = ctx->priv_data;
179			const char *audio_device;
180		✗	int res, flags = 0;
181			snd_pcm_format_t format;
182			snd_pcm_t *h;
183			snd_pcm_hw_params_t *hw_params;
184			snd_pcm_uframes_t buffer_size, period_size;
185
186		✗	if (ctx->url[0] == 0) audio_device = "default";
187		✗	else audio_device = ctx->url;
188
189		✗	if (*codec_id == AV_CODEC_ID_NONE)
190		✗	*codec_id = DEFAULT_CODEC_ID;
191		✗	format = codec_id_to_pcm_format(*codec_id);
192		✗	if (format == SND_PCM_FORMAT_UNKNOWN) {
193		✗	av_log(ctx, AV_LOG_ERROR, "sample format 0x%04x is not supported\n", *codec_id);
194		✗	return AVERROR(ENOSYS);
195			}
196		✗	s->frame_size = av_get_bits_per_sample(*codec_id) / 8 * layout->nb_channels;
197
198		✗	if (ctx->flags & AVFMT_FLAG_NONBLOCK) {
199		✗	flags = SND_PCM_NONBLOCK;
200			}
201		✗	res = snd_pcm_open(&h, audio_device, mode, flags);
202		✗	if (res < 0) {
203		✗	av_log(ctx, AV_LOG_ERROR, "cannot open audio device %s (%s)\n",
204			audio_device, snd_strerror(res));
205		✗	return AVERROR(EIO);
206			}
207
208		✗	res = snd_pcm_hw_params_malloc(&hw_params);
209		✗	if (res < 0) {
210		✗	av_log(ctx, AV_LOG_ERROR, "cannot allocate hardware parameter structure (%s)\n",
211			snd_strerror(res));
212		✗	goto fail1;
213			}
214
215		✗	res = snd_pcm_hw_params_any(h, hw_params);
216		✗	if (res < 0) {
217		✗	av_log(ctx, AV_LOG_ERROR, "cannot initialize hardware parameter structure (%s)\n",
218			snd_strerror(res));
219		✗	goto fail;
220			}
221
222		✗	res = snd_pcm_hw_params_set_access(h, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
223		✗	if (res < 0) {
224		✗	av_log(ctx, AV_LOG_ERROR, "cannot set access type (%s)\n",
225			snd_strerror(res));
226		✗	goto fail;
227			}
228
229		✗	res = snd_pcm_hw_params_set_format(h, hw_params, format);
230		✗	if (res < 0) {
231		✗	av_log(ctx, AV_LOG_ERROR, "cannot set sample format 0x%04x %d (%s)\n",
232			*codec_id, format, snd_strerror(res));
233		✗	goto fail;
234			}
235
236		✗	res = snd_pcm_hw_params_set_rate_near(h, hw_params, sample_rate, 0);
237		✗	if (res < 0) {
238		✗	av_log(ctx, AV_LOG_ERROR, "cannot set sample rate (%s)\n",
239			snd_strerror(res));
240		✗	goto fail;
241			}
242
243		✗	res = snd_pcm_hw_params_set_channels(h, hw_params, layout->nb_channels);
244		✗	if (res < 0) {
245		✗	av_log(ctx, AV_LOG_ERROR, "cannot set channel count to %d (%s)\n",
246		✗	layout->nb_channels, snd_strerror(res));
247		✗	goto fail;
248			}
249
250		✗	snd_pcm_hw_params_get_buffer_size_max(hw_params, &buffer_size);
251		✗	buffer_size = FFMIN(buffer_size, ALSA_BUFFER_SIZE_MAX);
252			/* TODO: maybe use ctx->max_picture_buffer somehow */
253		✗	res = snd_pcm_hw_params_set_buffer_size_near(h, hw_params, &buffer_size);
254		✗	if (res < 0) {
255		✗	av_log(ctx, AV_LOG_ERROR, "cannot set ALSA buffer size (%s)\n",
256			snd_strerror(res));
257		✗	goto fail;
258			}
259
260		✗	snd_pcm_hw_params_get_period_size_min(hw_params, &period_size, NULL);
261		✗	if (!period_size)
262		✗	period_size = buffer_size / 4;
263		✗	res = snd_pcm_hw_params_set_period_size_near(h, hw_params, &period_size, NULL);
264		✗	if (res < 0) {
265		✗	av_log(ctx, AV_LOG_ERROR, "cannot set ALSA period size (%s)\n",
266			snd_strerror(res));
267		✗	goto fail;
268			}
269		✗	s->period_size = period_size;
270
271		✗	res = snd_pcm_hw_params(h, hw_params);
272		✗	if (res < 0) {
273		✗	av_log(ctx, AV_LOG_ERROR, "cannot set parameters (%s)\n",
274			snd_strerror(res));
275		✗	goto fail;
276			}
277
278		✗	snd_pcm_hw_params_free(hw_params);
279
280		✗	if (layout->nb_channels > 2 && layout->order != AV_CHANNEL_ORDER_UNSPEC) {
281		✗	if (find_reorder_func(s, *codec_id, layout, mode == SND_PCM_STREAM_PLAYBACK) < 0) {
282			char name[128];
283		✗	av_channel_layout_describe(layout, name, sizeof(name));
284		✗	av_log(ctx, AV_LOG_WARNING, "ALSA channel layout unknown or unimplemented for %s %s.\n",
285			name, mode == SND_PCM_STREAM_PLAYBACK ? "playback" : "capture");
286			}
287		✗	if (s->reorder_func) {
288		✗	s->reorder_buf_size = buffer_size;
289		✗	s->reorder_buf = av_malloc_array(s->reorder_buf_size, s->frame_size);
290		✗	if (!s->reorder_buf)
291		✗	goto fail1;
292			}
293			}
294
295		✗	s->pkt = av_packet_alloc();
296		✗	if (!s->pkt)
297		✗	goto fail1;
298
299		✗	s->h = h;
300		✗	return 0;
301
302		✗	fail:
303		✗	snd_pcm_hw_params_free(hw_params);
304		✗	fail1:
305		✗	snd_pcm_close(h);
306		✗	return AVERROR(EIO);
307			}
308
309		✗	av_cold int ff_alsa_close(AVFormatContext *s1)
310			{
311		✗	AlsaData *s = s1->priv_data;
312
313		✗	if (snd_pcm_stream(s->h) == SND_PCM_STREAM_PLAYBACK) {
314		✗	snd_pcm_nonblock(s->h, 0);
315		✗	snd_pcm_drain(s->h);
316			}
317		✗	av_freep(&s->reorder_buf);
318			if (CONFIG_ALSA_INDEV)
319		✗	ff_timefilter_destroy(s->timefilter);
320		✗	snd_pcm_close(s->h);
321		✗	av_packet_free(&s->pkt);
322		✗	return 0;
323			}
324
325		✗	int ff_alsa_xrun_recover(AVFormatContext *s1, int err)
326			{
327		✗	AlsaData *s = s1->priv_data;
328		✗	snd_pcm_t *handle = s->h;
329
330		✗	av_log(s1, AV_LOG_WARNING, "ALSA buffer xrun.\n");
331		✗	if (err == -EPIPE) {
332		✗	err = snd_pcm_prepare(handle);
333		✗	if (err < 0) {
334		✗	av_log(s1, AV_LOG_ERROR, "cannot recover from underrun (snd_pcm_prepare failed: %s)\n", snd_strerror(err));
335
336		✗	return AVERROR(EIO);
337			}
338		✗	} else if (err == -ESTRPIPE) {
339		✗	av_log(s1, AV_LOG_ERROR, "-ESTRPIPE... Unsupported!\n");
340
341		✗	return -1;
342			}
343		✗	return err;
344			}
345
346		✗	int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size)
347			{
348		✗	int size = s->reorder_buf_size;
349			void *r;
350
351		✗	av_assert0(size != 0);
352		✗	while (size < min_size)
353		✗	size *= 2;
354		✗	r = av_realloc_array(s->reorder_buf, size, s->frame_size);
355		✗	if (!r)
356		✗	return AVERROR(ENOMEM);
357		✗	s->reorder_buf = r;
358		✗	s->reorder_buf_size = size;
359		✗	return 0;
360			}
361
362			/* ported from alsa-utils/aplay.c */
363		✗	int ff_alsa_get_device_list(AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type)
364			{
365		✗	int ret = 0;
366			void **hints, **n;
367		✗	char *name = NULL, *descr = NULL, *io = NULL, *tmp;
368		✗	AVDeviceInfo *new_device = NULL;
369		✗	const char *filter = stream_type == SND_PCM_STREAM_PLAYBACK ? "Output" : "Input";
370
371		✗	if (snd_device_name_hint(-1, "pcm", &hints) < 0)
372		✗	return AVERROR_EXTERNAL;
373		✗	n = hints;
374		✗	while (*n && !ret) {
375		✗	name = snd_device_name_get_hint(*n, "NAME");
376		✗	descr = snd_device_name_get_hint(*n, "DESC");
377		✗	io = snd_device_name_get_hint(*n, "IOID");
378		✗	if (!io || !strcmp(io, filter)) {
379		✗	new_device = av_mallocz(sizeof(AVDeviceInfo));
380		✗	if (!new_device) {
381		✗	ret = AVERROR(ENOMEM);
382		✗	goto fail;
383			}
384		✗	new_device->device_name = av_strdup(name);
385		✗	if ((tmp = strrchr(descr, '\n')) && tmp[1])
386		✗	new_device->device_description = av_strdup(&tmp[1]);
387			else
388		✗	new_device->device_description = av_strdup(descr);
389		✗	if (!new_device->device_description || !new_device->device_name) {
390		✗	ret = AVERROR(ENOMEM);
391		✗	goto fail;
392			}
393		✗	if ((ret = av_dynarray_add_nofree(&device_list->devices,
394			&device_list->nb_devices, new_device)) < 0) {
395		✗	goto fail;
396			}
397		✗	if (!strcmp(new_device->device_name, "default"))
398		✗	device_list->default_device = device_list->nb_devices - 1;
399		✗	new_device = NULL;
400			}
401		✗	fail:
402		✗	free(io);
403		✗	free(name);
404		✗	free(descr);
405		✗	n++;
406			}
407		✗	if (new_device) {
408		✗	av_free(new_device->device_description);
409		✗	av_free(new_device->device_name);
410		✗	av_free(new_device);
411			}
412		✗	snd_device_name_free_hint(hints);
413		✗	return ret;
414			}
415