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pjproject/pjmedia/src/pjmedia/wav_writer.c

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/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 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/wav_port.h>
#include <pjmedia/alaw_ulaw.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/log.h>
#include <pj/pool.h>
#include <pj/string.h>
#define THIS_FILE "wav_writer.c"
#define SIGNATURE PJMEDIA_SIG_PORT_WAV_WRITER
struct file_port
{
pjmedia_port base;
pjmedia_wave_fmt_tag fmt_tag;
pj_uint16_t bytes_per_sample;
pj_size_t bufsize;
char *buf;
char *writepos;
pj_size_t total;
pj_oshandle_t fd;
pj_size_t cb_size;
pj_status_t (*cb)(pjmedia_port*, void*);
pj_bool_t subscribed;
pj_bool_t cb_called;
void (*cb2)(pjmedia_port*, void*);
};
static pj_status_t file_put_frame(pjmedia_port *this_port,
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);
/*
* Create file writer port.
*/
PJ_DEF(pj_status_t) pjmedia_wav_writer_port_create( pj_pool_t *pool,
const char *filename,
unsigned sampling_rate,
unsigned channel_count,
unsigned samples_per_frame,
unsigned bits_per_sample,
unsigned flags,
pj_ssize_t buff_size,
pjmedia_port **p_port )
{
struct file_port *fport;
pjmedia_wave_hdr wave_hdr;
pj_ssize_t size;
pj_str_t name;
pj_status_t status;
/* Check arguments. */
PJ_ASSERT_RETURN(pool && filename && p_port, PJ_EINVAL);
/* Only supports 16bits per sample for now.
* See flush_buffer().
*/
PJ_ASSERT_RETURN(bits_per_sample == 16, PJ_EINVAL);
/* Create file port instance. */
fport = PJ_POOL_ZALLOC_T(pool, struct file_port);
PJ_ASSERT_RETURN(fport != NULL, PJ_ENOMEM);
/* Initialize port info. */
pj_strdup2(pool, &name, filename);
pjmedia_port_info_init(&fport->base.info, &name, SIGNATURE,
sampling_rate, channel_count, bits_per_sample,
samples_per_frame);
fport->base.get_frame = &file_get_frame;
fport->base.put_frame = &file_put_frame;
fport->base.on_destroy = &file_on_destroy;
if (flags == PJMEDIA_FILE_WRITE_ALAW) {
fport->fmt_tag = PJMEDIA_WAVE_FMT_TAG_ALAW;
fport->bytes_per_sample = 1;
} else if (flags == PJMEDIA_FILE_WRITE_ULAW) {
fport->fmt_tag = PJMEDIA_WAVE_FMT_TAG_ULAW;
fport->bytes_per_sample = 1;
} else {
fport->fmt_tag = PJMEDIA_WAVE_FMT_TAG_PCM;
fport->bytes_per_sample = 2;
}
/* Open file in write and read mode.
* We need the read mode because we'll modify the WAVE header once
* the recording has completed.
*/
status = pj_file_open(pool, filename, PJ_O_WRONLY | PJ_O_CLOEXEC,
&fport->fd);
if (status != PJ_SUCCESS)
return status;
/* Initialize WAVE header */
pj_bzero(&wave_hdr, sizeof(pjmedia_wave_hdr));
wave_hdr.riff_hdr.riff = PJMEDIA_RIFF_TAG;
wave_hdr.riff_hdr.file_len = 0; /* will be filled later */
wave_hdr.riff_hdr.wave = PJMEDIA_WAVE_TAG;
wave_hdr.fmt_hdr.fmt = PJMEDIA_FMT_TAG;
wave_hdr.fmt_hdr.len = 16;
wave_hdr.fmt_hdr.fmt_tag = (pj_uint16_t)fport->fmt_tag;
wave_hdr.fmt_hdr.nchan = (pj_int16_t)channel_count;
wave_hdr.fmt_hdr.sample_rate = sampling_rate;
wave_hdr.fmt_hdr.bytes_per_sec = sampling_rate * channel_count *
fport->bytes_per_sample;
wave_hdr.fmt_hdr.block_align = (pj_uint16_t)
(fport->bytes_per_sample * channel_count);
wave_hdr.fmt_hdr.bits_per_sample = (pj_uint16_t)
(fport->bytes_per_sample * 8);
wave_hdr.data_hdr.data = PJMEDIA_DATA_TAG;
wave_hdr.data_hdr.len = 0; /* will be filled later */
/* Convert WAVE header from host byte order to little endian
* before writing the header.
*/
pjmedia_wave_hdr_host_to_file(&wave_hdr);
/* Write WAVE header */
if (fport->fmt_tag != PJMEDIA_WAVE_FMT_TAG_PCM) {
pjmedia_wave_subchunk fact_chunk;
pj_uint32_t tmp = 0;
fact_chunk.id = PJMEDIA_FACT_TAG;
fact_chunk.len = 4;
PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(&fact_chunk);
/* Write WAVE header without DATA chunk header */
size = sizeof(pjmedia_wave_hdr) - sizeof(wave_hdr.data_hdr);
status = pj_file_write(fport->fd, &wave_hdr, &size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write FACT chunk if it stores compressed data */
size = sizeof(fact_chunk);
status = pj_file_write(fport->fd, &fact_chunk, &size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
size = 4;
status = pj_file_write(fport->fd, &tmp, &size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write DATA chunk header */
size = sizeof(wave_hdr.data_hdr);
status = pj_file_write(fport->fd, &wave_hdr.data_hdr, &size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
} else {
size = sizeof(pjmedia_wave_hdr);
status = pj_file_write(fport->fd, &wave_hdr, &size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
}
/* Set buffer size. */
if (buff_size < 1) buff_size = PJMEDIA_FILE_PORT_BUFSIZE;
fport->bufsize = buff_size;
/* Check that buffer size is greater than bytes per frame */
pj_assert(fport->bufsize >= PJMEDIA_PIA_AVG_FSZ(&fport->base.info));
/* Allocate buffer and set initial write position */
fport->buf = (char*) pj_pool_alloc(pool, fport->bufsize);
if (fport->buf == NULL) {
pj_file_close(fport->fd);
return PJ_ENOMEM;
}
fport->writepos = fport->buf;
/* Done. */
*p_port = &fport->base;
PJ_LOG(4,(THIS_FILE,
"File writer '%.*s' created: samp.rate=%d, bufsize=%luKB",
(int)fport->base.info.name.slen,
fport->base.info.name.ptr,
PJMEDIA_PIA_SRATE(&fport->base.info),
(unsigned long)(fport->bufsize / 1000)));
return PJ_SUCCESS;
}
/*
* Get current writing position.
*/
PJ_DEF(pj_ssize_t) pjmedia_wav_writer_port_get_pos( pjmedia_port *port )
{
struct file_port *fport;
/* Sanity check */
PJ_ASSERT_RETURN(port, -PJ_EINVAL);
/* Check that this is really a writer port */
PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP);
fport = (struct file_port*) port;
return fport->total;
}
#if !DEPRECATED_FOR_TICKET_2251
/*
* Register callback.
*/
PJ_DEF(pj_status_t) pjmedia_wav_writer_port_set_cb( pjmedia_port *port,
pj_size_t pos,
void *user_data,
pj_status_t (*cb)(pjmedia_port *port,
void *usr_data))
{
struct file_port *fport;
/* Sanity check */
PJ_ASSERT_RETURN(port && cb, PJ_EINVAL);
/* Check that this is really a writer port */
PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, PJ_EINVALIDOP);
PJ_LOG(1, (THIS_FILE, "pjmedia_wav_writer_port_set_cb() is deprecated. "
"Use pjmedia_wav_writer_port_set_cb2() instead."));
fport = (struct file_port*) port;
fport->cb_size = pos;
fport->base.port_data.pdata = user_data;
fport->cb = cb;
return PJ_SUCCESS;
}
#endif
/*
* Register callback.
*/
PJ_DEF(pj_status_t) pjmedia_wav_writer_port_set_cb2(pjmedia_port *port,
pj_size_t pos,
void *user_data,
void (*cb)(pjmedia_port *port,
void *usr_data))
{
struct file_port *fport;
/* Sanity check */
PJ_ASSERT_RETURN(port && cb, PJ_EINVAL);
/* Check that this is really a writer port */
PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, PJ_EINVALIDOP);
fport = (struct file_port*) port;
fport->cb_size = pos;
fport->base.port_data.pdata = user_data;
fport->cb2 = cb;
fport->cb_called = PJ_FALSE;
return PJ_SUCCESS;
}
#if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0
static void swap_samples(pj_int16_t *samples, unsigned count)
{
unsigned i;
for (i=0; i<count; ++i) {
samples[i] = pj_swap16(samples[i]);
}
}
#else
# define swap_samples(samples,count)
#endif
/*
* Flush the contents of the buffer to the file.
*/
static pj_status_t flush_buffer(struct file_port *fport)
{
pj_ssize_t bytes = fport->writepos - fport->buf;
pj_status_t status;
/* Convert samples to little endian */
swap_samples((pj_int16_t*)fport->buf, bytes/fport->bytes_per_sample);
/* Write to file. */
status = pj_file_write(fport->fd, fport->buf, &bytes);
/* Reset writepos */
fport->writepos = fport->buf;
return status;
}
static pj_status_t file_on_event(pjmedia_event *event,
void *user_data)
{
struct file_port *fport = (struct file_port*)user_data;
if (event->type == PJMEDIA_EVENT_CALLBACK) {
if (fport->cb2)
(*fport->cb2)(&fport->base, fport->base.port_data.pdata);
}
return PJ_SUCCESS;
}
/*
* Put a frame into the buffer. When the buffer is full, flush the buffer
* to the file.
*/
static pj_status_t file_put_frame(pjmedia_port *this_port,
pjmedia_frame *frame)
{
struct file_port *fport = (struct file_port *)this_port;
pj_size_t frame_size;
if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM)
frame_size = frame->size;
else
frame_size = frame->size >> 1;
/* Flush buffer if we don't have enough room for the frame. */
if (fport->writepos + frame_size > fport->buf + fport->bufsize) {
pj_status_t status;
status = flush_buffer(fport);
if (status != PJ_SUCCESS)
return status;
}
/* Check if frame is not too large. */
PJ_ASSERT_RETURN(fport->writepos+frame_size <= fport->buf+fport->bufsize,
PJMEDIA_EFRMFILETOOBIG);
/* Copy frame to buffer. */
if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) {
pj_memcpy(fport->writepos, frame->buf, frame->size);
} else {
unsigned i;
pj_int16_t *src = (pj_int16_t*)frame->buf;
pj_uint8_t *dst = (pj_uint8_t*)fport->writepos;
if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) {
for (i = 0; i < frame_size; ++i) {
*dst++ = pjmedia_linear2ulaw(*src++);
}
} else {
for (i = 0; i < frame_size; ++i) {
*dst++ = pjmedia_linear2alaw(*src++);
}
}
}
fport->writepos += frame_size;
/* Increment total written, and check if we need to call callback */
fport->total += frame_size;
if (fport->total >= fport->cb_size) {
if (fport->cb2) {
if (!fport->subscribed) {
pj_status_t status;
status = pjmedia_event_subscribe(NULL, &file_on_event,
fport, fport);
fport->subscribed = (status == PJ_SUCCESS)? PJ_TRUE:
PJ_FALSE;
}
if (fport->subscribed && !fport->cb_called) {
pjmedia_event event;
/* To prevent the callback from being called more than once. */
fport->cb_called = PJ_TRUE;
pjmedia_event_init(&event, PJMEDIA_EVENT_CALLBACK,
NULL, fport);
pjmedia_event_publish(NULL, fport, &event,
PJMEDIA_EVENT_PUBLISH_POST_EVENT);
}
} else if (fport->cb) {
pj_status_t (*cb)(pjmedia_port*, void*);
pj_status_t status;
cb = fport->cb;
fport->cb = NULL;
status = (*cb)(this_port, this_port->port_data.pdata);
return status;
}
}
return PJ_SUCCESS;
}
/*
* Get frame, basicy is a no-op operation.
*/
static pj_status_t file_get_frame(pjmedia_port *this_port,
pjmedia_frame *frame)
{
PJ_UNUSED_ARG(this_port);
PJ_UNUSED_ARG(frame);
return PJ_EINVALIDOP;
}
/*
* Close the port, modify file header with updated file length.
*/
static pj_status_t file_on_destroy(pjmedia_port *this_port)
{
enum { FILE_LEN_POS = 4, DATA_LEN_POS = 40 };
struct file_port *fport = (struct file_port *)this_port;
pj_off_t file_size;
pj_ssize_t bytes;
pj_uint32_t wave_file_len;
pj_uint32_t wave_data_len;
pj_status_t status;
pj_uint32_t data_len_pos = DATA_LEN_POS;
if (fport->subscribed) {
pjmedia_event_unsubscribe(NULL, &file_on_event, fport, fport);
fport->subscribed = PJ_FALSE;
}
/* Flush remaining buffers. */
if (fport->writepos != fport->buf)
flush_buffer(fport);
/* Get file size. */
status = pj_file_getpos(fport->fd, &file_size);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Calculate wave fields */
wave_file_len = (pj_uint32_t)(file_size - 8);
wave_data_len = (pj_uint32_t)(file_size - sizeof(pjmedia_wave_hdr));
#if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0
wave_file_len = pj_swap32(wave_file_len);
wave_data_len = pj_swap32(wave_data_len);
#endif
/* Seek to the file_len field. */
status = pj_file_setpos(fport->fd, FILE_LEN_POS, PJ_SEEK_SET);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write file_len */
bytes = sizeof(wave_file_len);
status = pj_file_write(fport->fd, &wave_file_len, &bytes);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write samples_len in FACT chunk */
if (fport->fmt_tag != PJMEDIA_WAVE_FMT_TAG_PCM) {
enum { SAMPLES_LEN_POS = 44};
pj_uint32_t wav_samples_len;
/* Adjust wave_data_len & data_len_pos since there is FACT chunk */
wave_data_len -= 12;
data_len_pos += 12;
wav_samples_len = wave_data_len;
/* Seek to samples_len field. */
status = pj_file_setpos(fport->fd, SAMPLES_LEN_POS, PJ_SEEK_SET);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write samples_len */
bytes = sizeof(wav_samples_len);
status = pj_file_write(fport->fd, &wav_samples_len, &bytes);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
}
/* Seek to data_len field. */
status = pj_file_setpos(fport->fd, data_len_pos, PJ_SEEK_SET);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Write file_len */
bytes = sizeof(wave_data_len);
status = pj_file_write(fport->fd, &wave_data_len, &bytes);
if (status != PJ_SUCCESS) {
pj_file_close(fport->fd);
return status;
}
/* Close file */
status = pj_file_close(fport->fd);
if (status != PJ_SUCCESS)
return status;
/* Done. */
return PJ_SUCCESS;
}
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