code.delx.au - pulseaudio/blob - src/pulsecore/sound-file-stream.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <errno.h>
  34
  35 #include <sndfile.h>
  36
  37 #include <pulse/xmalloc.h>
  38
  39 #include <pulsecore/core-error.h>
  40 #include <pulsecore/sink-input.h>
  41 #include <pulsecore/log.h>
  42
  43 #include "sound-file-stream.h"
  44
  45 #define BUF_SIZE (1024*16)
  46
  47 typedef struct file_stream {
  48     pa_msgobject parent;
  49     pa_core *core;
  50     SNDFILE *sndfile;
  51     pa_sink_input *sink_input;
  52     pa_memchunk memchunk;
  53     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
  54     size_t drop;
  55 } file_stream;
  56
  57 enum {
  58     FILE_STREAM_MESSAGE_UNLINK
  59 };
  60
  61 PA_DECLARE_CLASS(file_stream);
  62 #define FILE_STREAM(o) (file_stream_cast(o))
  63 static PA_DEFINE_CHECK_TYPE(file_stream, pa_msgobject);
  64
  65 static void file_stream_unlink(file_stream *u) {
  66     pa_assert(u);
  67
  68     if (!u->sink_input)
  69         return;
  70
  71     pa_sink_input_disconnect(u->sink_input);
  72
  73     pa_sink_input_unref(u->sink_input);
  74     u->sink_input = NULL;
  75
  76     /* Make sure we don't decrease the ref count twice. */
  77     file_stream_unref(u);
  78 }
  79
  80 static void file_stream_free(pa_object *o) {
  81     file_stream *u = FILE_STREAM(o);
  82     pa_assert(u);
  83
  84     file_stream_unlink(u);
  85
  86     if (u->memchunk.memblock)
  87         pa_memblock_unref(u->memchunk.memblock);
  88
  89     if (u->sndfile)
  90         sf_close(u->sndfile);
  91
  92     pa_xfree(u);
  93 }
  94
  95 static int file_stream_process_msg(pa_msgobject *o, int code, void*userdata, int64_t offset, pa_memchunk *chunk) {
  96     file_stream *u = FILE_STREAM(o);
  97     file_stream_assert_ref(u);
  98
  99     switch (code) {
 100         case FILE_STREAM_MESSAGE_UNLINK:
 101             file_stream_unlink(u);
 102             break;
 103     }
 104
 105     return 0;
 106 }
 107
 108 static void sink_input_kill_cb(pa_sink_input *i) {
 109     pa_sink_input_assert_ref(i);
 110
 111     file_stream_unlink(FILE_STREAM(i->userdata));
 112 }
 113
 114 static int sink_input_peek_cb(pa_sink_input *i, pa_memchunk *chunk) {
 115     file_stream *u;
 116
 117     pa_assert(i);
 118     pa_assert(chunk);
 119     u = FILE_STREAM(i->userdata);
 120     file_stream_assert_ref(u);
 121
 122     if (!u->sndfile)
 123         return -1;
 124
 125     for (;;) {
 126
 127         if (!u->memchunk.memblock) {
 128
 129             u->memchunk.memblock = pa_memblock_new(i->sink->core->mempool, BUF_SIZE);
 130             u->memchunk.index = 0;
 131
 132             if (u->readf_function) {
 133                 sf_count_t n;
 134                 void *p;
 135                 size_t fs = pa_frame_size(&i->sample_spec);
 136
 137                 p = pa_memblock_acquire(u->memchunk.memblock);
 138                 n = u->readf_function(u->sndfile, p, BUF_SIZE/fs);
 139                 pa_memblock_release(u->memchunk.memblock);
 140
 141                 if (n <= 0)
 142                     n = 0;
 143
 144                 u->memchunk.length = n * fs;
 145             } else {
 146                 sf_count_t n;
 147                 void *p;
 148
 149                 p = pa_memblock_acquire(u->memchunk.memblock);
 150                 n = sf_read_raw(u->sndfile, p, BUF_SIZE);
 151                 pa_memblock_release(u->memchunk.memblock);
 152
 153                 if (n <= 0)
 154                     n = 0;
 155
 156                 u->memchunk.length = n;
 157             }
 158
 159             if (u->memchunk.length <= 0) {
 160
 161                 pa_memblock_unref(u->memchunk.memblock);
 162                 pa_memchunk_reset(&u->memchunk);
 163
 164                 pa_asyncmsgq_post(u->core->asyncmsgq, PA_MSGOBJECT(u), FILE_STREAM_MESSAGE_UNLINK, NULL, 0, NULL, NULL);
 165
 166                 sf_close(u->sndfile);
 167                 u->sndfile = NULL;
 168
 169                 return -1;
 170             }
 171         }
 172
 173         pa_assert(u->memchunk.memblock);
 174         pa_assert(u->memchunk.length > 0);
 175
 176         if (u->drop < u->memchunk.length) {
 177             u->memchunk.index += u->drop;
 178             u->memchunk.length -= u->drop;
 179             u->drop = 0;
 180             break;
 181         }
 182
 183         u->drop -= u->memchunk.length;
 184         pa_memblock_unref(u->memchunk.memblock);
 185         pa_memchunk_reset(&u->memchunk);
 186     }
 187
 188     *chunk = u->memchunk;
 189     pa_memblock_ref(chunk->memblock);
 190
 191     pa_assert(chunk->length > 0);
 192     pa_assert(u->drop <= 0);
 193
 194     return 0;
 195 }
 196
 197 static void sink_input_drop_cb(pa_sink_input *i, size_t length) {
 198     file_stream *u;
 199
 200     pa_assert(i);
 201     pa_assert(length > 0);
 202     u = FILE_STREAM(i->userdata);
 203     file_stream_assert_ref(u);
 204
 205     if (u->memchunk.memblock) {
 206
 207         if (length < u->memchunk.length) {
 208             u->memchunk.index += length;
 209             u->memchunk.length -= length;
 210             return;
 211         }
 212
 213         length -= u->memchunk.length;
 214         pa_memblock_unref(u->memchunk.memblock);
 215         pa_memchunk_reset(&u->memchunk);
 216     }
 217
 218     u->drop += length;
 219 }
 220
 221 int pa_play_file(
 222         pa_sink *sink,
 223         const char *fname,
 224         const pa_cvolume *volume) {
 225
 226     file_stream *u = NULL;
 227     SF_INFO sfinfo;
 228     pa_sample_spec ss;
 229     pa_sink_input_new_data data;
 230     int fd;
 231
 232     pa_assert(sink);
 233     pa_assert(fname);
 234
 235     u = pa_msgobject_new(file_stream);
 236     u->parent.parent.free = file_stream_free;
 237     u->parent.process_msg = file_stream_process_msg;
 238     u->core = sink->core;
 239     u->sink_input = NULL;
 240     pa_memchunk_reset(&u->memchunk);
 241     u->sndfile = NULL;
 242     u->readf_function = NULL;
 243     u->drop = 0;
 244
 245     memset(&sfinfo, 0, sizeof(sfinfo));
 246
 247     if ((fd = open(fname, O_RDONLY|O_NOCTTY)) < 0) {
 248         pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
 249         goto fail;
 250     }
 251
 252     /* FIXME: For now we just use posix_fadvise to avoid page faults
 253      * when accessing the file data. Eventually we should move the
 254      * file reader into the main event loop and pass the data over the
 255      * asyncmsgq. */
 256
 257     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
 258         pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
 259         goto fail;
 260     } else
 261         pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
 262
 263     if (posix_fadvise(fd, 0, 0, POSIX_FADV_WILLNEED) < 0) {
 264         pa_log_warn("POSIX_FADV_WILLNEED failed: %s", pa_cstrerror(errno));
 265         goto fail;
 266     } else
 267         pa_log_debug("POSIX_FADV_WILLNEED succeeded.");
 268
 269     if (!(u->sndfile = sf_open_fd(fd, SFM_READ, &sfinfo, 1))) {
 270         pa_log("Failed to open file %s", fname);
 271         close(fd);
 272         goto fail;
 273     }
 274
 275     switch (sfinfo.format & 0xFF) {
 276         case SF_FORMAT_PCM_16:
 277         case SF_FORMAT_PCM_U8:
 278         case SF_FORMAT_PCM_S8:
 279             ss.format = PA_SAMPLE_S16NE;
 280             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
 281             break;
 282
 283         case SF_FORMAT_ULAW:
 284             ss.format = PA_SAMPLE_ULAW;
 285             break;
 286
 287         case SF_FORMAT_ALAW:
 288             ss.format = PA_SAMPLE_ALAW;
 289             break;
 290
 291         case SF_FORMAT_FLOAT:
 292         default:
 293             ss.format = PA_SAMPLE_FLOAT32NE;
 294             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 295             break;
 296     }
 297
 298     ss.rate = sfinfo.samplerate;
 299     ss.channels = sfinfo.channels;
 300
 301     if (!pa_sample_spec_valid(&ss)) {
 302         pa_log("Unsupported sample format in file %s", fname);
 303         goto fail;
 304     }
 305
 306     pa_sink_input_new_data_init(&data);
 307     data.sink = sink;
 308     data.driver = __FILE__;
 309     data.name = fname;
 310     pa_sink_input_new_data_set_sample_spec(&data, &ss);
 311     pa_sink_input_new_data_set_volume(&data, volume);
 312
 313     if (!(u->sink_input = pa_sink_input_new(sink->core, &data, 0)))
 314         goto fail;
 315
 316     u->sink_input->peek = sink_input_peek_cb;
 317     u->sink_input->drop = sink_input_drop_cb;
 318     u->sink_input->kill = sink_input_kill_cb;
 319     u->sink_input->userdata = u;
 320
 321     pa_sink_input_put(u->sink_input);
 322
 323     /* The reference to u is dangling here, because we want to keep
 324      * this stream around until it is fully played. */
 325
 326     return 0;
 327
 328 fail:
 329     if (u)
 330         file_stream_unref(u);
 331
 332     return -1;
 333 }