1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* $Id$ */
/*
* Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjmedia/file_port.h>
#include <pjmedia/errno.h>
#include <pjmedia/wave.h>
#include <pj/assert.h>
#include <pj/file_access.h>
#include <pj/file_io.h>
#include <pj/pool.h>
#include <pj/string.h>
#define SIGNATURE ('F'<<24|'I'<<16|'L'<<8|'E')
#define BUF_SIZE (320*10)
struct file_port
{
pjmedia_port base;
pj_size_t bufsize;
char *buf;
char *readpos;
};
static pj_status_t file_put_frame(pjmedia_port *this_port,
const pjmedia_frame *frame);
static pj_status_t file_get_frame(pjmedia_port *this_port,
pjmedia_frame *frame);
static pj_status_t file_on_destroy(pjmedia_port *this_port);
static pj_status_t read_buffer(struct file_port *port);
static struct file_port *create_file_port(pj_pool_t *pool)
{
struct file_port *port;
port = pj_pool_zalloc(pool, sizeof(struct file_port));
if (!port)
return NULL;
port->base.info.name = pj_str("file");
port->base.info.signature = SIGNATURE;
port->base.info.type = PJMEDIA_TYPE_AUDIO;
port->base.info.has_info = PJ_TRUE;
port->base.info.need_info = PJ_FALSE;
port->base.info.pt = 0xFF;
port->base.info.encoding_name = pj_str("pcm");
port->base.info.sample_rate = 8000;
port->base.info.bits_per_sample = 16;
port->base.info.samples_per_frame = 160;
port->base.info.bytes_per_frame = 320;
port->base.put_frame = &file_put_frame;
port->base.get_frame = &file_get_frame;
port->base.on_destroy = &file_on_destroy;
return port;
}
/*
* Create WAVE player port.
*/
PJ_DEF(pj_status_t) pjmedia_file_player_port_create( pj_pool_t *pool,
const char *filename,
unsigned flags,
pj_ssize_t buff_size,
void *user_data,
pjmedia_port **p_port )
{
pj_off_t file_size;
pj_oshandle_t fd = NULL;
pjmedia_wave_hdr wave_hdr;
pj_ssize_t size_read;
struct file_port *file_port;
pj_status_t status;
PJ_UNUSED_ARG(flags);
PJ_UNUSED_ARG(buff_size);
/* Check arguments. */
PJ_ASSERT_RETURN(pool && filename && p_port, PJ_EINVAL);
/* Check the file really exists. */
if (!pj_file_exists(filename)) {
return PJ_ENOTFOUND;
}
/* Get the file size. */
file_size = pj_file_size(filename);
/* Size must be more than WAVE header size */
if (file_size <= sizeof(pjmedia_wave_hdr)) {
return PJMEDIA_ENOTVALIDWAVE;
}
/* Open file. */
status = pj_file_open( pool, filename, PJ_O_RDONLY, &fd);
if (status != PJ_SUCCESS)
return status;
/* Read the WAVE header. */
size_read = sizeof(wave_hdr);
status = pj_file_read( fd, &wave_hdr, &size_read);
if (status != PJ_SUCCESS) {
pj_file_close(fd);
return status;
}
if (size_read != sizeof(wave_hdr)) {
pj_file_close(fd);
return PJMEDIA_ENOTVALIDWAVE;
}
/* Validate WAVE file. */
if (wave_hdr.riff_hdr.riff != PJMEDIA_RIFF_TAG ||
wave_hdr.riff_hdr.wave != PJMEDIA_WAVE_TAG ||
wave_hdr.fmt_hdr.fmt != PJMEDIA_FMT_TAG)
{
pj_file_close(fd);
return PJMEDIA_ENOTVALIDWAVE;
}
if (wave_hdr.fmt_hdr.fmt_tag != 1 ||
wave_hdr.fmt_hdr.nchan != 1 ||
wave_hdr.fmt_hdr.sample_rate != 8000 ||
wave_hdr.fmt_hdr.bytes_per_sec != 16000 ||
wave_hdr.fmt_hdr.block_align != 2 ||
wave_hdr.fmt_hdr.bits_per_sample != 16)
{
pj_file_close(fd);
return PJMEDIA_EWAVEUNSUPP;
}
/* Validate length. */
if (wave_hdr.data_hdr.len != file_size-sizeof(pjmedia_wave_hdr)) {
pj_file_close(fd);
return PJMEDIA_EWAVEUNSUPP;
}
if (wave_hdr.data_hdr.len < 400) {
pj_file_close(fd);
return PJMEDIA_EWAVETOOSHORT;
}
/* It seems like we have a valid WAVE file. */
/* Create file_port instance. */
file_port = create_file_port(pool);
if (!file_port) {
pj_file_close(fd);
return PJ_ENOMEM;
}
/* Initialize */
file_port->base.user_data = user_data;
/* For this version, we only support reading the whole
* contents of the file.
*/
file_port->bufsize = wave_hdr.data_hdr.len - 8;
/* Create buffer. */
file_port->buf = pj_pool_alloc(pool, file_port->bufsize);
if (!file_port->buf) {
pj_file_close(fd);
return PJ_ENOMEM;
}
file_port->readpos = file_port->buf;
/* Read the the file. */
size_read = file_port->bufsize;
status = pj_file_read(fd, file_port->buf, &size_read);
if (status != PJ_SUCCESS) {
pj_file_close(fd);
return status;
}
if (size_read != (pj_ssize_t)file_port->bufsize) {
pj_file_close(fd);
return PJMEDIA_ENOTVALIDWAVE;
}
/* Done. */
pj_file_close(fd);
*p_port = &file_port->base;
return PJ_SUCCESS;
}
/*
* Put frame to file.
*/
static pj_status_t file_put_frame(pjmedia_port *this_port,
const pjmedia_frame *frame)
{
PJ_UNUSED_ARG(this_port);
PJ_UNUSED_ARG(frame);
return PJ_EINVALIDOP;
}
/*
* Get frame from file.
*/
static pj_status_t file_get_frame(pjmedia_port *this_port,
pjmedia_frame *frame)
{
struct file_port *port = (struct file_port*)this_port;
pj_assert(port->base.info.signature == SIGNATURE);
/* Copy frame from buffer. */
frame->type = PJMEDIA_FRAME_TYPE_AUDIO;
frame->size = 320;
frame->timestamp.u64 = 0;
if (port->readpos + 320 <= port->buf + port->bufsize) {
pj_memcpy(frame->buf, port->readpos, 320);
port->readpos += 320;
if (port->readpos == port->buf + port->bufsize)
port->readpos = port->buf;
} else {
unsigned endread;
endread = (port->buf+port->bufsize) - port->readpos;
pj_memcpy(frame->buf, port->readpos, endread);
pj_memcpy(((char*)frame->buf)+endread, port->buf, 320-endread);
port->readpos = port->buf + (320-endread);
}
return PJ_SUCCESS;
}
/*
*
*/
static pj_status_t file_on_destroy(pjmedia_port *this_port)
{
PJ_UNUSED_ARG(this_port);
pj_assert(this_port->info.signature == SIGNATURE);
return PJ_SUCCESS;
}
|
