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 <assert.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 #include <sndfile.h>
  34
  35 #include <pulse/xmalloc.h>
  36
  37 #include <pulsecore/sink-input.h>
  38 #include <pulsecore/log.h>
  39
  40 #include "sound-file-stream.h"
  41
  42 #define BUF_SIZE (1024*10)
  43
  44 struct userdata {
  45     SNDFILE *sndfile;
  46     pa_sink_input *sink_input;
  47     pa_memchunk memchunk;
  48     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
  49 };
  50
  51 static void free_userdata(struct userdata *u) {
  52     assert(u);
  53     if (u->sink_input) {
  54         pa_sink_input_disconnect(u->sink_input);
  55         pa_sink_input_unref(u->sink_input);
  56     }
  57
  58     if (u->memchunk.memblock)
  59         pa_memblock_unref(u->memchunk.memblock);
  60     if (u->sndfile)
  61         sf_close(u->sndfile);
  62
  63     pa_xfree(u);
  64 }
  65
  66 static void sink_input_kill(pa_sink_input *i) {
  67     assert(i && i->userdata);
  68     free_userdata(i->userdata);
  69 }
  70
  71 static int sink_input_peek(pa_sink_input *i, 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 n;
  79
  80         u->memchunk.memblock = pa_memblock_new(i->sink->core->mempool, BUF_SIZE);
  81         u->memchunk.index = 0;
  82
  83         if (u->readf_function) {
  84             if ((n = u->readf_function(u->sndfile, u->memchunk.memblock->data, BUF_SIZE/fs)) <= 0)
  85                 n = 0;
  86
  87             u->memchunk.length = n * fs;
  88         } else {
  89             if ((n = sf_read_raw(u->sndfile, u->memchunk.memblock->data, BUF_SIZE)) <= 0)
  90                 n = 0;
  91
  92             u->memchunk.length = n;
  93         }
  94
  95         if (!u->memchunk.length) {
  96             free_userdata(u);
  97             return -1;
  98         }
  99     }
 100
 101     *chunk = u->memchunk;
 102     pa_memblock_ref(chunk->memblock);
 103     assert(chunk->length);
 104     return 0;
 105 }
 106
 107 static void sink_input_drop(pa_sink_input *i, const pa_memchunk*chunk, size_t length) {
 108     struct userdata *u;
 109     assert(i && chunk && length && i->userdata);
 110     u = i->userdata;
 111
 112     assert(!memcmp(chunk, &u->memchunk, sizeof(chunk)));
 113     assert(length <= u->memchunk.length);
 114
 115     u->memchunk.index += length;
 116     u->memchunk.length -= length;
 117
 118     if (u->memchunk.length <= 0) {
 119         pa_memblock_unref(u->memchunk.memblock);
 120         u->memchunk.memblock = NULL;
 121         u->memchunk.index = u->memchunk.length = 0;
 122     }
 123 }
 124
 125 int pa_play_file(
 126         pa_sink *sink,
 127         const char *fname,
 128         const pa_cvolume *volume) {
 129
 130     struct userdata *u = NULL;
 131     SF_INFO sfinfo;
 132     pa_sample_spec ss;
 133     pa_sink_input_new_data data;
 134
 135     assert(sink);
 136     assert(fname);
 137
 138     u = pa_xnew(struct userdata, 1);
 139     u->sink_input = NULL;
 140     u->memchunk.memblock = NULL;
 141     u->memchunk.index = u->memchunk.length = 0;
 142     u->sndfile = NULL;
 143
 144     memset(&sfinfo, 0, sizeof(sfinfo));
 145
 146     if (!(u->sndfile = sf_open(fname, SFM_READ, &sfinfo))) {
 147         pa_log("Failed to open file %s", fname);
 148         goto fail;
 149     }
 150
 151     u->readf_function = NULL;
 152
 153     switch (sfinfo.format & 0xFF) {
 154         case SF_FORMAT_PCM_16:
 155         case SF_FORMAT_PCM_U8:
 156         case SF_FORMAT_PCM_S8:
 157             ss.format = PA_SAMPLE_S16NE;
 158             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
 159             break;
 160
 161         case SF_FORMAT_ULAW:
 162             ss.format = PA_SAMPLE_ULAW;
 163             break;
 164
 165         case SF_FORMAT_ALAW:
 166             ss.format = PA_SAMPLE_ALAW;
 167             break;
 168
 169         case SF_FORMAT_FLOAT:
 170         default:
 171             ss.format = PA_SAMPLE_FLOAT32NE;
 172             u->readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 173             break;
 174     }
 175
 176     ss.rate = sfinfo.samplerate;
 177     ss.channels = sfinfo.channels;
 178
 179     if (!pa_sample_spec_valid(&ss)) {
 180         pa_log("Unsupported sample format in file %s", fname);
 181         goto fail;
 182     }
 183
 184     pa_sink_input_new_data_init(&data);
 185     data.sink = sink;
 186     data.driver = __FILE__;
 187     data.name = fname;
 188     pa_sink_input_new_data_set_sample_spec(&data, &ss);
 189     pa_sink_input_new_data_set_volume(&data, volume);
 190
 191     if (!(u->sink_input = pa_sink_input_new(sink->core, &data, 0)))
 192         goto fail;
 193
 194     u->sink_input->peek = sink_input_peek;
 195     u->sink_input->drop = sink_input_drop;
 196     u->sink_input->kill = sink_input_kill;
 197     u->sink_input->userdata = u;
 198
 199     pa_sink_notify(u->sink_input->sink);
 200
 201     return 0;
 202
 203 fail:
 204     if (u)
 205         free_userdata(u);
 206
 207     return -1;
 208 }