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Diffstat (limited to 'pjmedia/src/pjmedia/file_player.c')
-rw-r--r--pjmedia/src/pjmedia/file_player.c396
1 files changed, 396 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/file_player.c b/pjmedia/src/pjmedia/file_player.c
new file mode 100644
index 00000000..ca5a3e1e
--- /dev/null
+++ b/pjmedia/src/pjmedia/file_player.c
@@ -0,0 +1,396 @@
+/* $Id$ */
+/*
+ * 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/log.h>
+#include <pj/pool.h>
+#include <pj/string.h>
+
+
+#define THIS_FILE "file_port.c"
+
+
+#define SIGNATURE ('F'<<24|'P'<<16|'L'<<8|'Y')
+#define BYTES_PER_SAMPLE 2
+
+
+#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_port
+{
+ pjmedia_port base;
+ pj_size_t bufsize;
+ char *buf;
+ char *readpos;
+
+ pj_off_t fsize;
+ pj_off_t fpos;
+ pj_oshandle_t fd;
+
+};
+
+
+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 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.put_frame = &file_put_frame;
+ port->base.get_frame = &file_get_frame;
+ port->base.on_destroy = &file_on_destroy;
+
+
+ /* Put in default values.
+ * These will be overriden once the file is read.
+ */
+ 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;
+
+ return port;
+}
+
+/*
+ * Fill buffer.
+ */
+static pj_status_t fill_buffer(struct file_port *fport)
+{
+ pj_ssize_t size_left = fport->bufsize;
+ unsigned size_to_read;
+ pj_ssize_t size;
+ pj_status_t status;
+
+ 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;
+ }
+
+ size_left -= 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) {
+ PJ_LOG(5,(THIS_FILE, "File port %.*s EOF, rewinding..",
+ (int)fport->base.info.name.slen,
+ fport->base.info.name.ptr));
+ fport->fpos = sizeof(struct pjmedia_wave_hdr);
+ pj_file_setpos( fport->fd, fport->fpos, PJ_SEEK_SET);
+ }
+ }
+
+ /* Convert samples to host rep */
+ samples_to_host((pj_int16_t*)fport->buf, fport->bufsize/BYTES_PER_SAMPLE);
+
+ return PJ_SUCCESS;
+}
+
+
+/*
+ * 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 )
+{
+ pjmedia_wave_hdr wave_hdr;
+ pj_ssize_t size_read;
+ struct file_port *fport;
+ pj_status_t status;
+
+
+ PJ_UNUSED_ARG(flags);
+
+ /* Check arguments. */
+ PJ_ASSERT_RETURN(pool && filename && p_port, PJ_EINVAL);
+
+ /* Check the file really exists. */
+ if (!pj_file_exists(filename)) {
+ return PJ_ENOTFOUND;
+ }
+
+ /* 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 WAVE header. */
+ size_read = sizeof(wave_hdr);
+ status = pj_file_read( fport->fd, &wave_hdr, &size_read);
+ if (status != PJ_SUCCESS) {
+ pj_file_close(fport->fd);
+ return status;
+ }
+ if (size_read != sizeof(wave_hdr)) {
+ 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;
+ }
+
+ /* Must be PCM with 16bits per sample */
+ if (wave_hdr.fmt_hdr.fmt_tag != 1 ||
+ wave_hdr.fmt_hdr.bits_per_sample != 16)
+ {
+ pj_file_close(fport->fd);
+ return PJMEDIA_EWAVEUNSUPP;
+ }
+
+ /* Block align must be 2*nchannels */
+ if (wave_hdr.fmt_hdr.block_align != wave_hdr.fmt_hdr.nchan*BYTES_PER_SAMPLE) {
+ pj_file_close(fport->fd);
+ return PJMEDIA_EWAVEUNSUPP;
+ }
+
+ /* Validate length. */
+ if (wave_hdr.data_hdr.len != fport->fsize-sizeof(pjmedia_wave_hdr)) {
+ pj_file_close(fport->fd);
+ return PJMEDIA_EWAVEUNSUPP;
+ }
+ if (wave_hdr.data_hdr.len < 400) {
+ pj_file_close(fport->fd);
+ return PJMEDIA_EWAVETOOSHORT;
+ }
+
+ /* It seems like we have a valid WAVE file. */
+
+ /* Initialize */
+ fport->base.user_data = user_data;
+
+ /* Update port info. */
+ fport->base.info.channel_count = wave_hdr.fmt_hdr.nchan;
+ fport->base.info.sample_rate = wave_hdr.fmt_hdr.sample_rate;
+ fport->base.info.bits_per_sample = wave_hdr.fmt_hdr.bits_per_sample;
+ fport->base.info.samples_per_frame = fport->base.info.sample_rate *
+ wave_hdr.fmt_hdr.nchan *
+ 20 / 1000;
+ fport->base.info.bytes_per_frame =
+ fport->base.info.samples_per_frame *
+ fport->base.info.bits_per_sample / 8;
+
+ pj_strdup2(pool, &fport->base.info.name, filename);
+
+ /* Create file buffer.
+ */
+ if (buff_size < 1) buff_size = PJMEDIA_FILE_PORT_BUFSIZE;
+ fport->bufsize = buff_size;
+
+
+ /* Create buffer. */
+ fport->buf = 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 = sizeof(struct pjmedia_wave_hdr);
+
+ /* 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,
+ fport->base.info.sample_rate,
+ fport->base.info.channel_count,
+ fport->bufsize / 1000,
+ (unsigned long)(fport->fsize / 1000)));
+
+ 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 *fport = (struct file_port*)this_port;
+ unsigned frame_size;
+ pj_status_t status;
+
+ pj_assert(fport->base.info.signature == SIGNATURE);
+
+ //frame_size = fport->base.info.bytes_per_frame;
+ //pj_assert(frame->size == frame_size);
+ frame_size = frame->size;
+
+ /* Copy frame from buffer. */
+ frame->type = PJMEDIA_FRAME_TYPE_AUDIO;
+ frame->size = frame_size;
+ 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)
+ return status;
+ }
+ } else {
+ unsigned endread;
+
+ /* Split read.
+ * First stage: read until end of buffer.
+ */
+ endread = (fport->buf+fport->bufsize) - fport->readpos;
+ pj_memcpy(frame->buf, fport->readpos, endread);
+
+ /* Second stage: fill up buffer, and read from the start of buffer. */
+ status = fill_buffer(fport);
+ if (status != PJ_SUCCESS) {
+ pj_memset(((char*)frame->buf)+endread, 0, frame_size-endread);
+ return status;
+ }
+
+ pj_memcpy(((char*)frame->buf)+endread, fport->buf, frame_size-endread);
+ fport->readpos = fport->buf + (frame_size - endread);
+ }
+
+ return PJ_SUCCESS;
+}
+
+/*
+ * Destroy port.
+ */
+static pj_status_t file_on_destroy(pjmedia_port *this_port)
+{
+ struct file_port *fport = (struct file_port*) this_port;
+
+ pj_assert(this_port->info.signature == SIGNATURE);
+
+ pj_file_close(fport->fd);
+ return PJ_SUCCESS;
+}
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