| /* $Id$ */ |
| /* |
| * 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/mem_port.h> |
| #include <pj/assert.h> |
| #include <pj/errno.h> |
| #include <pj/pool.h> |
| |
| |
| #define THIS_FILE "mem_player.c" |
| |
| #define SIGNATURE PJMEDIA_SIG_PORT_MEM_PLAYER |
| #define BYTES_PER_SAMPLE 2 |
| |
| struct mem_player |
| { |
| pjmedia_port base; |
| |
| unsigned options; |
| pj_timestamp timestamp; |
| |
| char *buffer; |
| pj_size_t buf_size; |
| char *read_pos; |
| |
| pj_bool_t eof; |
| void *user_data; |
| pj_status_t (*cb)(pjmedia_port *port, |
| void *user_data); |
| |
| }; |
| |
| |
| static pj_status_t mem_put_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame); |
| static pj_status_t mem_get_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame); |
| static pj_status_t mem_on_destroy(pjmedia_port *this_port); |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_mem_player_create( pj_pool_t *pool, |
| const void *buffer, |
| pj_size_t size, |
| unsigned clock_rate, |
| unsigned channel_count, |
| unsigned samples_per_frame, |
| unsigned bits_per_sample, |
| unsigned options, |
| pjmedia_port **p_port ) |
| { |
| struct mem_player *port; |
| pj_str_t name = pj_str("memplayer"); |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(pool && buffer && size && clock_rate && channel_count && |
| samples_per_frame && bits_per_sample && p_port, |
| PJ_EINVAL); |
| |
| /* Can only support 16bit PCM */ |
| PJ_ASSERT_RETURN(bits_per_sample == 16, PJ_EINVAL); |
| |
| |
| port = PJ_POOL_ZALLOC_T(pool, struct mem_player); |
| PJ_ASSERT_RETURN(port != NULL, PJ_ENOMEM); |
| |
| /* Create the port */ |
| pjmedia_port_info_init(&port->base.info, &name, SIGNATURE, clock_rate, |
| channel_count, bits_per_sample, samples_per_frame); |
| |
| port->base.put_frame = &mem_put_frame; |
| port->base.get_frame = &mem_get_frame; |
| port->base.on_destroy = &mem_on_destroy; |
| |
| |
| /* Save the buffer */ |
| port->buffer = port->read_pos = (char*)buffer; |
| port->buf_size = size; |
| |
| /* Options */ |
| port->options = options; |
| |
| *p_port = &port->base; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| |
| /* |
| * Register a callback to be called when the file reading has reached the |
| * end of buffer. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_mem_player_set_eof_cb( pjmedia_port *port, |
| void *user_data, |
| pj_status_t (*cb)(pjmedia_port *port, |
| void *usr_data)) |
| { |
| struct mem_player *player; |
| |
| PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, |
| PJ_EINVALIDOP); |
| |
| player = (struct mem_player*) port; |
| player->user_data = user_data; |
| player->cb = cb; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| static pj_status_t mem_put_frame( pjmedia_port *this_port, |
| pjmedia_frame *frame) |
| { |
| PJ_UNUSED_ARG(this_port); |
| PJ_UNUSED_ARG(frame); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| static pj_status_t mem_get_frame( pjmedia_port *this_port, |
| pjmedia_frame *frame) |
| { |
| struct mem_player *player; |
| char *endpos; |
| pj_size_t size_needed, size_written; |
| |
| PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, |
| PJ_EINVALIDOP); |
| |
| player = (struct mem_player*) this_port; |
| |
| if (player->eof) { |
| pj_status_t status = PJ_SUCCESS; |
| |
| /* Call callback, if any */ |
| if (player->cb) |
| status = (*player->cb)(this_port, player->user_data); |
| |
| /* 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) || (player->options & PJMEDIA_MEM_NO_LOOP)) { |
| frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| return PJ_EEOF; |
| } |
| |
| player->eof = PJ_FALSE; |
| } |
| |
| size_needed = PJMEDIA_PIA_AVG_FSZ(&this_port->info); |
| size_written = 0; |
| endpos = player->buffer + player->buf_size; |
| |
| while (size_written < size_needed) { |
| char *dst = ((char*)frame->buf) + size_written; |
| pj_size_t max; |
| |
| max = size_needed - size_written; |
| if (endpos - player->read_pos < (int)max) |
| max = endpos - player->read_pos; |
| |
| pj_memcpy(dst, player->read_pos, max); |
| size_written += max; |
| player->read_pos += max; |
| |
| pj_assert(player->read_pos <= endpos); |
| |
| if (player->read_pos == endpos) { |
| /* Set EOF flag */ |
| player->eof = PJ_TRUE; |
| /* Reset read pointer */ |
| player->read_pos = player->buffer; |
| |
| /* Pad with zeroes then return for no looped play */ |
| if (player->options & PJMEDIA_MEM_NO_LOOP) { |
| pj_size_t null_len; |
| |
| null_len = size_needed - size_written; |
| pj_bzero(dst + max, null_len); |
| break; |
| } |
| } |
| } |
| |
| frame->size = PJMEDIA_PIA_AVG_FSZ(&this_port->info); |
| frame->timestamp.u64 = player->timestamp.u64; |
| frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| |
| player->timestamp.u64 += PJMEDIA_PIA_SPF(&this_port->info); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| static pj_status_t mem_on_destroy(pjmedia_port *this_port) |
| { |
| PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, |
| PJ_EINVALIDOP); |
| |
| /* Destroy signature */ |
| this_port->info.signature = 0; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |