121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/**
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* RPiPlay - An open-source AirPlay mirroring server for Raspberry Pi
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* Copyright (C) 2019 Florian Draschbacher
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "audio_renderer.h"
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#include <stdlib.h>
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <math.h>
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#include <gst/app/gstappsrc.h>
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struct audio_renderer_s {
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logger_t *logger;
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GstElement *appsrc;
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GstElement *pipeline;
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GstElement *volume;
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};
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audio_renderer_t *audio_renderer_init(logger_t *logger, video_renderer_t *video_renderer, audio_device_t device, bool low_latency) {
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audio_renderer_t *renderer;
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GError *error = NULL;
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renderer = calloc(1, sizeof(audio_renderer_t));
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if (!renderer) {
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return NULL;
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}
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renderer->logger = logger;
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renderer->pipeline = gst_parse_launch("appsrc name=audio_source stream-type=0 format=GST_FORMAT_TIME is-live=true ! queue ! decodebin !"
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"audioconvert ! volume name=volume ! level ! autoaudiosink sync=false", &error);
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g_assert (renderer->pipeline);
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renderer->appsrc = gst_bin_get_by_name (GST_BIN (renderer->pipeline), "audio_source");
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renderer->volume = gst_bin_get_by_name (GST_BIN (renderer->pipeline), "volume");
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gchar eld_conf[] = { 0xF8, 0xE8, 0x50, 0x00 };
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GstBuffer *codec_data = gst_buffer_new_and_alloc(sizeof(eld_conf));
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GstMapInfo map;
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gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
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memset (map.data, eld_conf[0], map.size);
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memset (map.data+1, eld_conf[1], map.size);
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memset (map.data+2, eld_conf[2], map.size);
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memset (map.data+3, eld_conf[3], map.size);
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GstCaps *caps = gst_caps_new_simple ("audio/mpeg",
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"rate", G_TYPE_INT, 44100,
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"channels", G_TYPE_INT, 2,
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"mpegversion", G_TYPE_INT, 4,
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"stream-format", G_TYPE_STRING, "raw",
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"codec_data", GST_TYPE_BUFFER, codec_data,
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NULL);
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g_object_set(renderer->appsrc, "caps", caps, NULL);
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gst_caps_unref(caps);
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gst_buffer_unmap (codec_data, &map);
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gst_buffer_unref (codec_data);
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return renderer;
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}
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void audio_renderer_start(audio_renderer_t *renderer) {
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//g_signal_connect( renderer->pipeline, "deep-notify", G_CALLBACK(gst_object_default_deep_notify ), NULL );
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gst_element_set_state (renderer->pipeline, GST_STATE_PLAYING);
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}
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void audio_renderer_render_buffer(audio_renderer_t *renderer, raop_ntp_t *ntp, unsigned char* data, int data_len, uint64_t pts) {
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GstBuffer *buffer;
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if (data_len == 0) return;
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buffer = gst_buffer_new_and_alloc(data_len);
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assert(buffer != NULL);
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GST_BUFFER_DTS(buffer) = (GstClockTime)pts;
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gst_buffer_fill(buffer, 0, data, data_len);
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gst_app_src_push_buffer(GST_APP_SRC(renderer->appsrc), buffer);
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}
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void audio_renderer_set_volume(audio_renderer_t *renderer, float volume) {
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float avol;
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if (fabs(volume) < 28) {
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avol=floorf(((28-fabs(volume))/28)*10)/10;
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g_object_set(renderer->volume, "volume", avol, NULL);
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}
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}
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void audio_renderer_flush(audio_renderer_t *renderer) {
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}
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void audio_renderer_destroy(audio_renderer_t *renderer) {
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gst_app_src_end_of_stream (GST_APP_SRC(renderer->appsrc));
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gst_element_set_state (renderer->pipeline, GST_STATE_NULL);
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gst_object_unref (renderer->pipeline);
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gst_object_unref (renderer->appsrc);
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gst_object_unref (renderer->volume);
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if (renderer) {
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free(renderer);
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}
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}
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