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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <assert.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include <sndfile.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/sink-input.h>
  36 #include <pulsecore/log.h>
  37
  38 #include "sound-file-stream.h"
  39
  40 #define BUF_SIZE (1024*10)
  41
  42 struct userdata {
  43     SNDFILE *sndfile;
  44     pa_sink_input *sink_input;
  45     pa_memchunk memchunk;
  46     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
  47 };
  48
  49 static void free_userdata(struct userdata *u) {
  50     assert(u);
  51     if (u->sink_input) {
  52         pa_sink_input_disconnect(u->sink_input);
  53         pa_sink_input_unref(u->sink_input);
  54     }
  55
  56     if (u->memchunk.memblock)
  57         pa_memblock_unref(u->memchunk.memblock);
  58     if (u->sndfile)
  59         sf_close(u->sndfile);
  60
  61     pa_xfree(u);
  62 }
  63
  64 static void sink_input_kill(pa_sink_input *i) {
  65     assert(i && i->userdata);
  66     free_userdata(i->userdata);
  67 }
  68
  69 static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
  70     struct userdata *u;
  71     assert(i && chunk && i->userdata);
  72     u = i->userdata;
  73
  74     if (!u->memchunk.memblock) {
  75         uint32_t fs = pa_frame_size(&i->sample_spec);
  76         sf_count_t n;
  77
  78         u->memchunk.memblock = pa_memblock_new(BUF_SIZE, i->sink->core->memblock_stat);
  79         u->memchunk.index = 0;
  80
  81         if (u->readf_function) {
  82             if ((n = u->readf_function(u->sndfile, u->memchunk.memblock->data, BUF_SIZE/fs)) <= 0)
  83                 n = 0;
  84
  85             u->memchunk.length = n * fs;
  86         } else {
  87             if ((n = sf_read_raw(u->sndfile, u->memchunk.memblock->data, BUF_SIZE)) <= 0)
  88                 n = 0;
  89
  90             u->memchunk.length = n;
  91         }
  92
  93         if (!u->memchunk.length) {
  94             free_userdata(u);
  95             return -1;
  96         }
  97     }
  98
  99     *chunk = u->memchunk;
 100     pa_memblock_ref(chunk->memblock);
 101     assert(chunk->length);
 102     return 0;
 103 }
 104
 105 static void sink_input_drop(pa_sink_input *i, const pa_memchunk*chunk, size_t length) {
 106     struct userdata *u;
 107     assert(i && chunk && length && i->userdata);
 108     u = i->userdata;
 109
 110     assert(!memcmp(chunk, &u->memchunk, sizeof(chunk)));
 111     assert(length <= u->memchunk.length);
 112
 113     u->memchunk.index += length;
 114     u->memchunk.length -= length;
 115
 116     if (u->memchunk.length <= 0) {
 117         pa_memblock_unref(u->memchunk.memblock);
 118         u->memchunk.memblock = NULL;
 119         u->memchunk.index = u->memchunk.length = 0;
 120     }
 121 }
 122
 123 int pa_play_file(pa_sink *sink, const char *fname, const pa_cvolume *volume) {
 124     struct userdata *u = NULL;
 125     SF_INFO sfinfo;
 126     pa_sample_spec ss;
 127     assert(sink && fname);
 128
 129     u = pa_xmalloc(sizeof(struct userdata));
 130     u->sink_input = NULL;
 131     u->memchunk.memblock = NULL;
 132     u->memchunk.index = u->memchunk.length = 0;
 133     u->sndfile = NULL;
 134
 135     memset(&sfinfo, 0, sizeof(sfinfo));
 136
 137     if (!(u->sndfile = sf_open(fname, SFM_READ, &sfinfo))) {
 138         pa_log(__FILE__": Failed to open file %s", fname);
 139         goto fail;
 140     }
 141
 142     u->readf_function = NULL;
 143
 144     switch (sfinfo.format & 0xFF) {
 145         case SF_FORMAT_PCM_16:
 146         case SF_FORMAT_PCM_U8:
 147         case SF_FORMAT_PCM_S8:
 148             ss.format = PA_SAMPLE_S16NE;
 149             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
 150             break;
 151
 152         case SF_FORMAT_ULAW:
 153             ss.format = PA_SAMPLE_ULAW;
 154             break;
 155
 156         case SF_FORMAT_ALAW:
 157             ss.format = PA_SAMPLE_ALAW;
 158             break;
 159
 160         case SF_FORMAT_FLOAT:
 161         default:
 162             ss.format = PA_SAMPLE_FLOAT32NE;
 163             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 164             break;
 165     }
 166
 167     ss.rate = sfinfo.samplerate;
 168     ss.channels = sfinfo.channels;
 169
 170     if (!pa_sample_spec_valid(&ss)) {
 171         pa_log(__FILE__": Unsupported sample format in file %s", fname);
 172         goto fail;
 173     }
 174
 175     if (!(u->sink_input = pa_sink_input_new(sink, __FILE__, fname, &ss, NULL, volume, 0, -1)))
 176         goto fail;
 177
 178     u->sink_input->peek = sink_input_peek;
 179     u->sink_input->drop = sink_input_drop;
 180     u->sink_input->kill = sink_input_kill;
 181     u->sink_input->userdata = u;
 182
 183     pa_sink_notify(sink);
 184
 185     return 0;
 186
 187 fail:
 188     if (u)
 189         free_userdata(u);
 190
 191     return -1;
 192 }