| /* $Id$ */ |
| /* |
| * 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_player.c" |
| |
| |
| #define SIGNATURE PJMEDIA_SIG_PORT_WAV_PLAYER |
| #define BITS_PER_SAMPLE 16 |
| |
| #if 1 |
| # define TRACE_(x) PJ_LOG(4,x) |
| #else |
| # define TRACE_(x) |
| #endif |
| |
| #if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0 |
| static void samples_to_host(pj_int16_t *samples, unsigned count) |
| { |
| unsigned i; |
| for (i=0; i<count; ++i) { |
| samples[i] = pj_swap16(samples[i]); |
| } |
| } |
| #else |
| # define samples_to_host(samples,count) |
| #endif |
| |
| struct file_reader_port |
| { |
| pjmedia_port base; |
| unsigned options; |
| pjmedia_wave_fmt_tag fmt_tag; |
| pj_uint16_t bytes_per_sample; |
| pj_bool_t eof; |
| pj_uint32_t bufsize; |
| char *buf; |
| char *readpos; |
| char *eofpos; |
| |
| pj_off_t fsize; |
| unsigned start_data; |
| unsigned data_len; |
| unsigned data_left; |
| pj_off_t fpos; |
| pj_oshandle_t fd; |
| |
| pj_status_t (*cb)(pjmedia_port*, void*); |
| }; |
| |
| |
| 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 struct file_reader_port *create_file_port(pj_pool_t *pool) |
| { |
| const pj_str_t name = pj_str("file"); |
| struct file_reader_port *port; |
| |
| port = PJ_POOL_ZALLOC_T(pool, struct file_reader_port); |
| if (!port) |
| return NULL; |
| |
| /* Put in default values. |
| * These will be overriden once the file is read. |
| */ |
| pjmedia_port_info_init(&port->base.info, &name, SIGNATURE, |
| 8000, 1, 16, 80); |
| |
| port->base.get_frame = &file_get_frame; |
| port->base.on_destroy = &file_on_destroy; |
| |
| |
| return port; |
| } |
| |
| /* |
| * Fill buffer. |
| */ |
| static pj_status_t fill_buffer(struct file_reader_port *fport) |
| { |
| pj_uint32_t size_left = fport->bufsize; |
| unsigned size_to_read; |
| pj_ssize_t size; |
| pj_status_t status; |
| |
| fport->eofpos = NULL; |
| |
| while (size_left > 0) { |
| |
| /* Calculate how many bytes to read in this run. */ |
| size = size_to_read = size_left; |
| status = pj_file_read(fport->fd, |
| &fport->buf[fport->bufsize-size_left], |
| &size); |
| if (status != PJ_SUCCESS) |
| return status; |
| if (size < 0) { |
| /* Should return more appropriate error code here.. */ |
| return PJ_ECANCELLED; |
| } |
| |
| if (size > (pj_ssize_t)fport->data_left) { |
| /* We passed the end of the data chunk, |
| * only count the portion read from the data chunk. |
| */ |
| size = (pj_ssize_t)fport->data_left; |
| } |
| |
| size_left -= (pj_uint32_t)size; |
| fport->data_left -= (pj_uint32_t)size; |
| fport->fpos += size; |
| |
| /* If size is less than size_to_read, it indicates that we've |
| * encountered EOF. Rewind the file. |
| */ |
| if (size < (pj_ssize_t)size_to_read) { |
| fport->eof = PJ_TRUE; |
| fport->eofpos = fport->buf + fport->bufsize - size_left; |
| |
| if (fport->options & PJMEDIA_FILE_NO_LOOP) { |
| /* Zero remaining buffer */ |
| if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| pj_bzero(fport->eofpos, size_left); |
| } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| int val = pjmedia_linear2ulaw(0); |
| pj_memset(fport->eofpos, val, size_left); |
| } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) { |
| int val = pjmedia_linear2alaw(0); |
| pj_memset(fport->eofpos, val, size_left); |
| } |
| size_left = 0; |
| } |
| |
| /* Rewind file */ |
| fport->fpos = fport->start_data; |
| pj_file_setpos( fport->fd, fport->fpos, PJ_SEEK_SET); |
| fport->data_left = fport->data_len; |
| } |
| } |
| |
| /* Convert samples to host rep */ |
| samples_to_host((pj_int16_t*)fport->buf, |
| fport->bufsize/fport->bytes_per_sample); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Create WAVE player port. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_wav_player_port_create( pj_pool_t *pool, |
| const char *filename, |
| unsigned ptime, |
| unsigned options, |
| pj_ssize_t buff_size, |
| pjmedia_port **p_port ) |
| { |
| pjmedia_wave_hdr wave_hdr; |
| pj_ssize_t size_to_read, size_read; |
| struct file_reader_port *fport; |
| pjmedia_audio_format_detail *ad; |
| pj_off_t pos; |
| pj_str_t name; |
| unsigned samples_per_frame; |
| pj_status_t status = PJ_SUCCESS; |
| |
| |
| /* Check arguments. */ |
| PJ_ASSERT_RETURN(pool && filename && p_port, PJ_EINVAL); |
| |
| /* Check the file really exists. */ |
| if (!pj_file_exists(filename)) { |
| return PJ_ENOTFOUND; |
| } |
| |
| /* Normalize ptime */ |
| if (ptime == 0) |
| ptime = 20; |
| |
| /* Normalize buff_size */ |
| if (buff_size < 1) buff_size = PJMEDIA_FILE_PORT_BUFSIZE; |
| |
| |
| /* Create fport instance. */ |
| fport = create_file_port(pool); |
| if (!fport) { |
| return PJ_ENOMEM; |
| } |
| |
| |
| /* Get the file size. */ |
| fport->fsize = pj_file_size(filename); |
| |
| /* Size must be more than WAVE header size */ |
| if (fport->fsize <= sizeof(pjmedia_wave_hdr)) { |
| return PJMEDIA_ENOTVALIDWAVE; |
| } |
| |
| /* Open file. */ |
| status = pj_file_open( pool, filename, PJ_O_RDONLY, &fport->fd); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| /* Read the file header plus fmt header only. */ |
| size_read = size_to_read = sizeof(wave_hdr) - 8; |
| status = pj_file_read( fport->fd, &wave_hdr, &size_read); |
| if (status != PJ_SUCCESS) { |
| pj_file_close(fport->fd); |
| return status; |
| } |
| if (size_read != size_to_read) { |
| pj_file_close(fport->fd); |
| return PJMEDIA_ENOTVALIDWAVE; |
| } |
| |
| /* Normalize WAVE header fields values from little-endian to host |
| * byte order. |
| */ |
| pjmedia_wave_hdr_file_to_host(&wave_hdr); |
| |
| /* 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(fport->fd); |
| TRACE_((THIS_FILE, |
| "actual value|expected riff=%x|%x, wave=%x|%x fmt=%x|%x", |
| wave_hdr.riff_hdr.riff, PJMEDIA_RIFF_TAG, |
| wave_hdr.riff_hdr.wave, PJMEDIA_WAVE_TAG, |
| wave_hdr.fmt_hdr.fmt, PJMEDIA_FMT_TAG)); |
| return PJMEDIA_ENOTVALIDWAVE; |
| } |
| |
| /* Validate format and its attributes (i.e: bits per sample, block align) */ |
| switch (wave_hdr.fmt_hdr.fmt_tag) { |
| case PJMEDIA_WAVE_FMT_TAG_PCM: |
| if (wave_hdr.fmt_hdr.bits_per_sample != 16 || |
| wave_hdr.fmt_hdr.block_align != 2 * wave_hdr.fmt_hdr.nchan) |
| status = PJMEDIA_EWAVEUNSUPP; |
| break; |
| |
| case PJMEDIA_WAVE_FMT_TAG_ALAW: |
| case PJMEDIA_WAVE_FMT_TAG_ULAW: |
| if (wave_hdr.fmt_hdr.bits_per_sample != 8 || |
| wave_hdr.fmt_hdr.block_align != wave_hdr.fmt_hdr.nchan) |
| status = PJMEDIA_ENOTVALIDWAVE; |
| break; |
| |
| default: |
| status = PJMEDIA_EWAVEUNSUPP; |
| break; |
| } |
| |
| if (status != PJ_SUCCESS) { |
| pj_file_close(fport->fd); |
| return status; |
| } |
| |
| fport->fmt_tag = (pjmedia_wave_fmt_tag)wave_hdr.fmt_hdr.fmt_tag; |
| fport->bytes_per_sample = (pj_uint16_t) |
| (wave_hdr.fmt_hdr.bits_per_sample / 8); |
| |
| /* If length of fmt_header is greater than 16, skip the remaining |
| * fmt header data. |
| */ |
| if (wave_hdr.fmt_hdr.len > 16) { |
| size_to_read = wave_hdr.fmt_hdr.len - 16; |
| status = pj_file_setpos(fport->fd, size_to_read, PJ_SEEK_CUR); |
| if (status != PJ_SUCCESS) { |
| pj_file_close(fport->fd); |
| return status; |
| } |
| } |
| |
| /* Repeat reading the WAVE file until we have 'data' chunk */ |
| for (;;) { |
| pjmedia_wave_subchunk subchunk; |
| size_read = 8; |
| status = pj_file_read(fport->fd, &subchunk, &size_read); |
| if (status != PJ_SUCCESS || size_read != 8) { |
| pj_file_close(fport->fd); |
| return PJMEDIA_EWAVETOOSHORT; |
| } |
| |
| /* Normalize endianness */ |
| PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(&subchunk); |
| |
| /* Break if this is "data" chunk */ |
| if (subchunk.id == PJMEDIA_DATA_TAG) { |
| wave_hdr.data_hdr.data = PJMEDIA_DATA_TAG; |
| wave_hdr.data_hdr.len = subchunk.len; |
| break; |
| } |
| |
| /* Otherwise skip the chunk contents */ |
| size_to_read = subchunk.len; |
| status = pj_file_setpos(fport->fd, size_to_read, PJ_SEEK_CUR); |
| if (status != PJ_SUCCESS) { |
| pj_file_close(fport->fd); |
| return status; |
| } |
| } |
| |
| /* Current file position now points to start of data */ |
| status = pj_file_getpos(fport->fd, &pos); |
| fport->start_data = (unsigned)pos; |
| fport->data_len = wave_hdr.data_hdr.len; |
| fport->data_left = wave_hdr.data_hdr.len; |
| |
| /* Validate length. */ |
| if (wave_hdr.data_hdr.len > fport->fsize - fport->start_data) { |
| pj_file_close(fport->fd); |
| return PJMEDIA_EWAVEUNSUPP; |
| } |
| if (wave_hdr.data_hdr.len < ptime * wave_hdr.fmt_hdr.sample_rate * |
| wave_hdr.fmt_hdr.nchan / 1000) |
| { |
| pj_file_close(fport->fd); |
| return PJMEDIA_EWAVETOOSHORT; |
| } |
| |
| /* It seems like we have a valid WAVE file. */ |
| |
| /* Initialize */ |
| fport->options = options; |
| |
| /* Update port info. */ |
| ad = pjmedia_format_get_audio_format_detail(&fport->base.info.fmt, 1); |
| pj_strdup2(pool, &name, filename); |
| samples_per_frame = ptime * wave_hdr.fmt_hdr.sample_rate * |
| wave_hdr.fmt_hdr.nchan / 1000; |
| pjmedia_port_info_init(&fport->base.info, &name, SIGNATURE, |
| wave_hdr.fmt_hdr.sample_rate, |
| wave_hdr.fmt_hdr.nchan, |
| BITS_PER_SAMPLE, |
| samples_per_frame); |
| |
| /* If file is shorter than buffer size, adjust buffer size to file |
| * size. Otherwise EOF callback will be called multiple times when |
| * fill_buffer() is called. |
| */ |
| if (wave_hdr.data_hdr.len < (unsigned)buff_size) |
| buff_size = wave_hdr.data_hdr.len; |
| |
| /* Create file buffer. |
| */ |
| fport->bufsize = (pj_uint32_t)buff_size; |
| |
| |
| /* samples_per_frame must be smaller than bufsize (because get_frame() |
| * doesn't handle this case). |
| */ |
| if (samples_per_frame * fport->bytes_per_sample >= fport->bufsize) { |
| pj_file_close(fport->fd); |
| return PJ_EINVAL; |
| } |
| |
| /* Create buffer. */ |
| fport->buf = (char*) pj_pool_alloc(pool, fport->bufsize); |
| if (!fport->buf) { |
| pj_file_close(fport->fd); |
| return PJ_ENOMEM; |
| } |
| |
| fport->readpos = fport->buf; |
| |
| /* Set initial position of the file. */ |
| fport->fpos = fport->start_data; |
| |
| /* Fill up the buffer. */ |
| status = fill_buffer(fport); |
| if (status != PJ_SUCCESS) { |
| pj_file_close(fport->fd); |
| return status; |
| } |
| |
| /* Done. */ |
| |
| *p_port = &fport->base; |
| |
| |
| PJ_LOG(4,(THIS_FILE, |
| "File player '%.*s' created: samp.rate=%d, ch=%d, bufsize=%uKB, " |
| "filesize=%luKB", |
| (int)fport->base.info.name.slen, |
| fport->base.info.name.ptr, |
| ad->clock_rate, |
| ad->channel_count, |
| fport->bufsize / 1000, |
| (unsigned long)(fport->fsize / 1000))); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get the data length, in bytes. |
| */ |
| PJ_DEF(pj_ssize_t) pjmedia_wav_player_get_len(pjmedia_port *port) |
| { |
| struct file_reader_port *fport; |
| pj_ssize_t size; |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| |
| /* Check that this is really a player port */ |
| PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| |
| fport = (struct file_reader_port*) port; |
| |
| size = (pj_ssize_t) fport->fsize; |
| return size - fport->start_data; |
| } |
| |
| |
| /* |
| * Set position. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_wav_player_port_set_pos(pjmedia_port *port, |
| pj_uint32_t bytes ) |
| { |
| struct file_reader_port *fport; |
| pj_status_t status; |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(port, PJ_EINVAL); |
| |
| /* Check that this is really a player port */ |
| PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, PJ_EINVALIDOP); |
| |
| |
| fport = (struct file_reader_port*) port; |
| |
| /* Check that this offset does not pass the audio-data (in case of |
| * extra chunk after audio data chunk |
| */ |
| PJ_ASSERT_RETURN(bytes < fport->data_len, PJ_EINVAL); |
| |
| fport->fpos = fport->start_data + bytes; |
| fport->data_left = fport->data_len - bytes; |
| pj_file_setpos( fport->fd, fport->fpos, PJ_SEEK_SET); |
| |
| fport->eof = PJ_FALSE; |
| status = fill_buffer(fport); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| fport->readpos = fport->buf; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get the file play position of WAV player. |
| */ |
| PJ_DEF(pj_ssize_t) pjmedia_wav_player_port_get_pos( pjmedia_port *port ) |
| { |
| struct file_reader_port *fport; |
| pj_size_t payload_pos; |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| |
| /* Check that this is really a player port */ |
| PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| |
| fport = (struct file_reader_port*) port; |
| |
| payload_pos = (pj_size_t)(fport->fpos - fport->start_data); |
| if (payload_pos >= fport->bufsize) |
| return payload_pos - fport->bufsize + (fport->readpos - fport->buf); |
| else |
| return (fport->readpos - fport->buf) % payload_pos; |
| } |
| |
| |
| |
| /* |
| * Register a callback to be called when the file reading has reached the |
| * end of file. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_wav_player_set_eof_cb( pjmedia_port *port, |
| void *user_data, |
| pj_status_t (*cb)(pjmedia_port *port, |
| void *usr_data)) |
| { |
| struct file_reader_port *fport; |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| |
| /* Check that this is really a player port */ |
| PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| |
| fport = (struct file_reader_port*) port; |
| |
| fport->base.port_data.pdata = user_data; |
| fport->cb = cb; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get frame from file. |
| */ |
| static pj_status_t file_get_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame) |
| { |
| struct file_reader_port *fport = (struct file_reader_port*)this_port; |
| pj_size_t frame_size; |
| pj_status_t status; |
| |
| pj_assert(fport->base.info.signature == SIGNATURE); |
| pj_assert(frame->size <= fport->bufsize); |
| |
| /* EOF is set and readpos already passed the eofpos */ |
| if (fport->eof && fport->readpos >= fport->eofpos) { |
| pj_status_t status = PJ_SUCCESS; |
| |
| PJ_LOG(5,(THIS_FILE, "File port %.*s EOF", |
| (int)fport->base.info.name.slen, |
| fport->base.info.name.ptr)); |
| |
| /* Call callback, if any */ |
| if (fport->cb) |
| status = (*fport->cb)(this_port, fport->base.port_data.pdata); |
| |
| /* If callback returns non PJ_SUCCESS or 'no loop' is specified, |
| * return immediately (and don't try to access player port since |
| * it might have been destroyed by the callback). |
| */ |
| if ((status != PJ_SUCCESS) || (fport->options & PJMEDIA_FILE_NO_LOOP)) { |
| frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| frame->size = 0; |
| return PJ_EEOF; |
| } |
| |
| PJ_LOG(5,(THIS_FILE, "File port %.*s rewinding..", |
| (int)fport->base.info.name.slen, |
| fport->base.info.name.ptr)); |
| |
| fport->eof = PJ_FALSE; |
| } |
| |
| //pj_assert(frame->size == fport->base.info.bytes_per_frame); |
| if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| frame_size = frame->size; |
| //frame->size = frame_size; |
| } else { |
| /* Must be ULAW or ALAW */ |
| pj_assert(fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW || |
| fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW); |
| |
| frame_size = frame->size >> 1; |
| frame->size = frame_size << 1; |
| } |
| |
| /* Copy frame from buffer. */ |
| frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| frame->timestamp.u64 = 0; |
| |
| if ((fport->readpos + frame_size) <= (fport->buf + fport->bufsize)) |
| { |
| /* Read contiguous buffer. */ |
| pj_memcpy(frame->buf, fport->readpos, frame_size); |
| |
| /* Fill up the buffer if all has been read. */ |
| fport->readpos += frame_size; |
| if (fport->readpos == fport->buf + fport->bufsize) { |
| fport->readpos = fport->buf; |
| |
| status = fill_buffer(fport); |
| if (status != PJ_SUCCESS) { |
| frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| frame->size = 0; |
| fport->readpos = fport->buf + fport->bufsize; |
| return status; |
| } |
| } |
| } else { |
| unsigned endread; |
| |
| /* Split read. |
| * First stage: read until end of buffer. |
| */ |
| endread = (unsigned)((fport->buf+fport->bufsize) - fport->readpos); |
| pj_memcpy(frame->buf, fport->readpos, endread); |
| |
| /* End Of Buffer and EOF and NO LOOP */ |
| if (fport->eof && (fport->options & PJMEDIA_FILE_NO_LOOP)) { |
| fport->readpos += endread; |
| |
| if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| pj_bzero((char*)frame->buf + endread, frame_size - endread); |
| } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| int val = pjmedia_linear2ulaw(0); |
| pj_memset((char*)frame->buf + endread, val, |
| frame_size - endread); |
| } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) { |
| int val = pjmedia_linear2alaw(0); |
| pj_memset((char*)frame->buf + endread, val, |
| frame_size - endread); |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Second stage: fill up buffer, and read from the start of buffer. */ |
| status = fill_buffer(fport); |
| if (status != PJ_SUCCESS) { |
| frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| frame->size = 0; |
| fport->readpos = fport->buf + fport->bufsize; |
| return status; |
| } |
| |
| pj_memcpy(((char*)frame->buf)+endread, fport->buf, frame_size-endread); |
| fport->readpos = fport->buf + (frame_size - endread); |
| } |
| |
| if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW || |
| fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) |
| { |
| unsigned i; |
| pj_uint16_t *dst; |
| pj_uint8_t *src; |
| |
| dst = (pj_uint16_t*)frame->buf + frame_size - 1; |
| src = (pj_uint8_t*)frame->buf + frame_size - 1; |
| |
| if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| for (i = 0; i < frame_size; ++i) { |
| *dst-- = (pj_uint16_t) pjmedia_ulaw2linear(*src--); |
| } |
| } else { |
| for (i = 0; i < frame_size; ++i) { |
| *dst-- = (pj_uint16_t) pjmedia_alaw2linear(*src--); |
| } |
| } |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Destroy port. |
| */ |
| static pj_status_t file_on_destroy(pjmedia_port *this_port) |
| { |
| struct file_reader_port *fport = (struct file_reader_port*) this_port; |
| |
| pj_assert(this_port->info.signature == SIGNATURE); |
| |
| pj_file_close(fport->fd); |
| return PJ_SUCCESS; |
| } |
| |