Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 |
||
| 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 | } |