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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU 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   polypaudio 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 General Public License
  17   along with polypaudio; 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 "sound-file-stream.h"
  34 #include "sink-input.h"
  35 #include "xmalloc.h"
  36 #include "log.h"
  37
  38 #define BUF_SIZE (1024*10)
  39
  40 struct userdata {
  41     SNDFILE *sndfile;
  42     struct pa_sink_input *sink_input;
  43     struct pa_memchunk memchunk;
  44     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
  45 };
  46
  47 static void free_userdata(struct userdata *u) {
  48     assert(u);
  49     if (u->sink_input) {
  50         pa_sink_input_disconnect(u->sink_input);
  51         pa_sink_input_unref(u->sink_input);
  52     }
  53
  54     if (u->memchunk.memblock)
  55         pa_memblock_unref(u->memchunk.memblock);
  56     if (u->sndfile)
  57         sf_close(u->sndfile);
  58
  59     pa_xfree(u);
  60 }
  61
  62 static void sink_input_kill(struct pa_sink_input *i) {
  63     assert(i && i->userdata);
  64     free_userdata(i->userdata);
  65 }
  66
  67 static void si_kill(struct pa_mainloop_api *m, void *i) {
  68     sink_input_kill(i);
  69 }
  70
  71 static int sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
  72     struct userdata *u;
  73     assert(i && chunk && i->userdata);
  74     u = i->userdata;
  75
  76     if (!u->memchunk.memblock) {
  77         uint32_t fs = pa_frame_size(&i->sample_spec);
  78         sf_count_t samples = BUF_SIZE/fs;
  79
  80         u->memchunk.memblock = pa_memblock_new(BUF_SIZE, i->sink->core->memblock_stat);
  81         u->memchunk.index = 0;
  82         samples = u->readf_function(u->sndfile, u->memchunk.memblock->data, samples);
  83         u->memchunk.length = samples*fs;
  84
  85         if (!u->memchunk.length) {
  86             pa_memblock_unref(u->memchunk.memblock);
  87             u->memchunk.memblock = NULL;
  88             u->memchunk.index = u->memchunk.length = 0;
  89             pa_mainloop_api_once(i->sink->core->mainloop, si_kill, i);
  90             return -1;
  91         }
  92     }
  93
  94     *chunk = u->memchunk;
  95     pa_memblock_ref(chunk->memblock);
  96     assert(chunk->length);
  97     return 0;
  98 }
  99
 100 static void sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk*chunk, size_t length) {
 101     struct userdata *u;
 102     assert(i && chunk && length && i->userdata);
 103     u = i->userdata;
 104
 105     assert(!memcmp(chunk, &u->memchunk, sizeof(chunk)));
 106     assert(length <= u->memchunk.length);
 107
 108     u->memchunk.index += length;
 109     u->memchunk.length -= length;
 110
 111     if (u->memchunk.length <= 0) {
 112         pa_memblock_unref(u->memchunk.memblock);
 113         u->memchunk.memblock = NULL;
 114         u->memchunk.index = u->memchunk.length = 0;
 115     }
 116 }
 117
 118 int pa_play_file(struct pa_sink *sink, const char *fname, pa_volume_t volume) {
 119     struct userdata *u = NULL;
 120     SF_INFO sfinfo;
 121     struct pa_sample_spec ss;
 122     assert(sink && fname);
 123
 124     if (volume <= 0)
 125         goto fail;
 126
 127     u = pa_xmalloc(sizeof(struct userdata));
 128     u->sink_input = NULL;
 129     u->memchunk.memblock = NULL;
 130     u->memchunk.index = u->memchunk.length = 0;
 131     u->sndfile = NULL;
 132
 133     memset(&sfinfo, 0, sizeof(sfinfo));
 134
 135     if (!(u->sndfile = sf_open(fname, SFM_READ, &sfinfo))) {
 136         pa_log(__FILE__": Failed to open file %s\n", fname);
 137         goto fail;
 138     }
 139
 140     switch (sfinfo.format & 0xFF) {
 141         case SF_FORMAT_PCM_16:
 142         case SF_FORMAT_PCM_U8:
 143         case SF_FORMAT_ULAW:
 144         case SF_FORMAT_ALAW:
 145             ss.format = PA_SAMPLE_S16NE;
 146             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
 147             break;
 148         case SF_FORMAT_FLOAT:
 149         default:
 150             ss.format = PA_SAMPLE_FLOAT32NE;
 151             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 152             break;
 153     }
 154
 155     ss.rate = sfinfo.samplerate;
 156     ss.channels = sfinfo.channels;
 157
 158     if (!pa_sample_spec_valid(&ss)) {
 159         pa_log(__FILE__": Unsupported sample format in file %s\n", fname);
 160         goto fail;
 161     }
 162
 163     if (!(u->sink_input = pa_sink_input_new(sink, fname, &ss, 0, -1)))
 164         goto fail;
 165
 166     u->sink_input->volume = volume;
 167     u->sink_input->peek = sink_input_peek;
 168     u->sink_input->drop = sink_input_drop;
 169     u->sink_input->kill = sink_input_kill;
 170     u->sink_input->userdata = u;
 171
 172     pa_sink_notify(sink);
 173
 174     return 0;
 175
 176 fail:
 177     if (u)
 178         free_userdata(u);
 179
 180     return -1;
 181 }