510 lines
12 KiB
C
510 lines
12 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol client.
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* Audio Output Virtual Channel
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*
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* Copyright 2011 Vic Lee
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pulse/pulseaudio.h>
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#include <freerdp/types.h>
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#include <freerdp/utils/memory.h>
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#include <freerdp/utils/dsp.h>
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#include <freerdp/utils/svc_plugin.h>
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#include "rdpsnd_main.h"
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typedef struct rdpsnd_pulse_plugin rdpsndPulsePlugin;
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struct rdpsnd_pulse_plugin
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{
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rdpsndDevicePlugin device;
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char* device_name;
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pa_threaded_mainloop *mainloop;
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pa_context *context;
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pa_sample_spec sample_spec;
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pa_stream *stream;
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int format;
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int block_size;
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int latency;
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ADPCM adpcm;
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};
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static void rdpsnd_pulse_context_state_callback(pa_context* context, void* userdata)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)userdata;
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pa_context_state_t state;
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state = pa_context_get_state(context);
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switch (state)
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{
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case PA_CONTEXT_READY:
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DEBUG_SVC("PA_CONTEXT_READY");
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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break;
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case PA_CONTEXT_FAILED:
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case PA_CONTEXT_TERMINATED:
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DEBUG_SVC("PA_CONTEXT_FAILED/PA_CONTEXT_TERMINATED %d", (int)state);
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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break;
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default:
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DEBUG_SVC("state %d", (int)state);
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break;
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}
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}
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static boolean rdpsnd_pulse_connect(rdpsndDevicePlugin* device)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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pa_context_state_t state;
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if (!pulse->context)
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return false;
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if (pa_context_connect(pulse->context, NULL, 0, NULL))
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{
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DEBUG_WARN("pa_context_connect failed (%d)", pa_context_errno(pulse->context));
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return false;
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}
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pa_threaded_mainloop_lock(pulse->mainloop);
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if (pa_threaded_mainloop_start(pulse->mainloop) < 0)
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{
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pa_threaded_mainloop_unlock(pulse->mainloop);
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DEBUG_WARN("pa_threaded_mainloop_start failed (%d)", pa_context_errno(pulse->context));
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return false;
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}
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for (;;)
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{
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state = pa_context_get_state(pulse->context);
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if (state == PA_CONTEXT_READY)
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break;
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if (!PA_CONTEXT_IS_GOOD(state))
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{
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DEBUG_WARN("bad context state (%d)", pa_context_errno(pulse->context));
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break;
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}
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pa_threaded_mainloop_wait(pulse->mainloop);
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}
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pa_threaded_mainloop_unlock(pulse->mainloop);
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if (state == PA_CONTEXT_READY)
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{
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DEBUG_SVC("connected");
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return true;
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}
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else
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{
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pa_context_disconnect(pulse->context);
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return false;
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}
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}
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static void rdpsnd_pulse_stream_success_callback(pa_stream* stream, int success, void* userdata)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)userdata;
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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}
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static void rdpsnd_pulse_wait_for_operation(rdpsndPulsePlugin* pulse, pa_operation* operation)
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{
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if (operation == NULL)
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return;
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while (pa_operation_get_state(operation) == PA_OPERATION_RUNNING)
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{
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pa_threaded_mainloop_wait(pulse->mainloop);
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}
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pa_operation_unref(operation);
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}
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static void rdpsnd_pulse_stream_state_callback(pa_stream* stream, void* userdata)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)userdata;
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pa_stream_state_t state;
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state = pa_stream_get_state(stream);
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switch (state)
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{
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case PA_STREAM_READY:
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DEBUG_SVC("PA_STREAM_READY");
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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break;
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case PA_STREAM_FAILED:
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case PA_STREAM_TERMINATED:
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DEBUG_SVC("state %d", (int)state);
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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break;
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default:
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DEBUG_SVC("state %d", (int)state);
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break;
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}
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}
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static void rdpsnd_pulse_stream_request_callback(pa_stream* stream, size_t length, void* userdata)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)userdata;
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pa_threaded_mainloop_signal(pulse->mainloop, 0);
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}
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static void rdpsnd_pulse_close(rdpsndDevicePlugin* device)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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if (!pulse->context || !pulse->stream)
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return;
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pa_threaded_mainloop_lock(pulse->mainloop);
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rdpsnd_pulse_wait_for_operation(pulse,
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pa_stream_drain(pulse->stream, rdpsnd_pulse_stream_success_callback, pulse));
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pa_stream_disconnect(pulse->stream);
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pa_stream_unref(pulse->stream);
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pulse->stream = NULL;
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pa_threaded_mainloop_unlock(pulse->mainloop);
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}
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static void rdpsnd_pulse_set_format_spec(rdpsndPulsePlugin* pulse, rdpsndFormat* format)
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{
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pa_sample_spec sample_spec = { 0 };
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if (!pulse->context)
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return;
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sample_spec.rate = format->nSamplesPerSec;
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sample_spec.channels = format->nChannels;
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switch (format->wFormatTag)
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{
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case 1: /* PCM */
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switch (format->wBitsPerSample)
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{
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case 8:
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sample_spec.format = PA_SAMPLE_U8;
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break;
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case 16:
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sample_spec.format = PA_SAMPLE_S16LE;
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break;
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}
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break;
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case 6: /* A-LAW */
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sample_spec.format = PA_SAMPLE_ALAW;
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break;
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case 7: /* U-LAW */
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sample_spec.format = PA_SAMPLE_ULAW;
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break;
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case 0x11: /* IMA ADPCM */
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sample_spec.format = PA_SAMPLE_S16LE;
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break;
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}
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pulse->sample_spec = sample_spec;
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pulse->format = format->wFormatTag;
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pulse->block_size = format->nBlockAlign;
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}
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static void rdpsnd_pulse_open(rdpsndDevicePlugin* device, rdpsndFormat* format, int latency)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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pa_stream_state_t state;
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pa_stream_flags_t flags;
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pa_buffer_attr buffer_attr = { 0 };
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char ss[PA_SAMPLE_SPEC_SNPRINT_MAX];
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if (!pulse->context || pulse->stream)
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{
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DEBUG_WARN("pulse stream has been created.");
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return;
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}
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rdpsnd_pulse_set_format_spec(pulse, format);
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pulse->latency = latency;
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if (pa_sample_spec_valid(&pulse->sample_spec) == 0)
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{
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pa_sample_spec_snprint(ss, sizeof(ss), &pulse->sample_spec);
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DEBUG_WARN("Invalid sample spec %s", ss);
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return;
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}
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pa_threaded_mainloop_lock(pulse->mainloop);
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pulse->stream = pa_stream_new(pulse->context, "freerdp",
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&pulse->sample_spec, NULL);
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if (!pulse->stream)
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{
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pa_threaded_mainloop_unlock(pulse->mainloop);
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DEBUG_WARN("pa_stream_new failed (%d)",
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pa_context_errno(pulse->context));
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return;
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}
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/* install essential callbacks */
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pa_stream_set_state_callback(pulse->stream,
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rdpsnd_pulse_stream_state_callback, pulse);
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pa_stream_set_write_callback(pulse->stream,
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rdpsnd_pulse_stream_request_callback, pulse);
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flags = PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
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if (pulse->latency > 0)
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{
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buffer_attr.maxlength = pa_usec_to_bytes(pulse->latency * 2 * 1000, &pulse->sample_spec);
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buffer_attr.tlength = pa_usec_to_bytes(pulse->latency * 1000, &pulse->sample_spec);
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buffer_attr.prebuf = (uint32_t) -1;
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buffer_attr.minreq = (uint32_t) -1;
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buffer_attr.fragsize = (uint32_t) -1;
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flags |= PA_STREAM_ADJUST_LATENCY;
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}
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if (pa_stream_connect_playback(pulse->stream,
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pulse->device_name, pulse->latency > 0 ? &buffer_attr : NULL, flags, NULL, NULL) < 0)
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{
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pa_threaded_mainloop_unlock(pulse->mainloop);
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DEBUG_WARN("pa_stream_connect_playback failed (%d)",
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pa_context_errno(pulse->context));
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return;
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}
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for (;;)
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{
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state = pa_stream_get_state(pulse->stream);
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if (state == PA_STREAM_READY)
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break;
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if (!PA_STREAM_IS_GOOD(state))
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{
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DEBUG_WARN("bad stream state (%d)",
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pa_context_errno(pulse->context));
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break;
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}
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pa_threaded_mainloop_wait(pulse->mainloop);
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}
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pa_threaded_mainloop_unlock(pulse->mainloop);
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if (state == PA_STREAM_READY)
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{
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memset(&pulse->adpcm, 0, sizeof(ADPCM));
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DEBUG_SVC("connected");
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}
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else
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{
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rdpsnd_pulse_close(device);
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}
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}
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static void rdpsnd_pulse_free(rdpsndDevicePlugin* device)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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if (!pulse)
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return;
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rdpsnd_pulse_close(device);
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if (pulse->mainloop)
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{
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pa_threaded_mainloop_stop(pulse->mainloop);
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}
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if (pulse->context)
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{
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pa_context_disconnect(pulse->context);
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pa_context_unref(pulse->context);
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pulse->context = NULL;
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}
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if (pulse->mainloop)
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{
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pa_threaded_mainloop_free(pulse->mainloop);
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pulse->mainloop = NULL;
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}
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xfree(pulse->device_name);
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xfree(pulse);
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}
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static boolean rdpsnd_pulse_format_supported(rdpsndDevicePlugin* device, rdpsndFormat* format)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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if (!pulse->context)
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return false;
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switch (format->wFormatTag)
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{
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case 1: /* PCM */
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if (format->cbSize == 0 &&
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(format->nSamplesPerSec <= PA_RATE_MAX) &&
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(format->wBitsPerSample == 8 || format->wBitsPerSample == 16) &&
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(format->nChannels >= 1 && format->nChannels <= PA_CHANNELS_MAX))
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{
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return true;
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}
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break;
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case 6: /* A-LAW */
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case 7: /* U-LAW */
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if (format->cbSize == 0 &&
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(format->nSamplesPerSec <= PA_RATE_MAX) &&
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(format->wBitsPerSample == 8) &&
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(format->nChannels >= 1 && format->nChannels <= PA_CHANNELS_MAX))
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{
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return true;
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}
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break;
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case 0x11: /* IMA ADPCM */
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if ((format->nSamplesPerSec <= PA_RATE_MAX) &&
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(format->wBitsPerSample == 4) &&
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(format->nChannels == 1 || format->nChannels == 2))
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{
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return true;
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}
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break;
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}
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return false;
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}
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static void rdpsnd_pulse_set_format(rdpsndDevicePlugin* device, rdpsndFormat* format, int latency)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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if (pulse->stream)
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{
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pa_threaded_mainloop_lock(pulse->mainloop);
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pa_stream_disconnect(pulse->stream);
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pa_stream_unref(pulse->stream);
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pulse->stream = NULL;
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pa_threaded_mainloop_unlock(pulse->mainloop);
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}
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rdpsnd_pulse_open(device, format, latency);
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}
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static void rdpsnd_pulse_set_volume(rdpsndDevicePlugin* device, uint32 value)
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{
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}
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static void rdpsnd_pulse_play(rdpsndDevicePlugin* device, uint8* data, int size)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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int len;
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int ret;
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uint8* decoded_data;
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uint8* src;
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int decoded_size;
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if (!pulse->stream)
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return;
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if (pulse->format == 0x11)
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{
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decoded_data = dsp_decode_ima_adpcm(&pulse->adpcm,
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data, size, pulse->sample_spec.channels, pulse->block_size, &decoded_size);
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size = decoded_size;
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src = decoded_data;
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}
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else
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{
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decoded_data = NULL;
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src = data;
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}
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pa_threaded_mainloop_lock(pulse->mainloop);
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while (size > 0)
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{
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while ((len = pa_stream_writable_size(pulse->stream)) == 0)
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{
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pa_threaded_mainloop_wait(pulse->mainloop);
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}
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if (len < 0)
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break;
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if (len > size)
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len = size;
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ret = pa_stream_write(pulse->stream, src, len, NULL, 0LL, PA_SEEK_RELATIVE);
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if (ret < 0)
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{
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DEBUG_WARN("pa_stream_write failed (%d)",
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pa_context_errno(pulse->context));
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break;
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}
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src += len;
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size -= len;
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}
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pa_threaded_mainloop_unlock(pulse->mainloop);
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if (decoded_data)
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xfree(decoded_data);
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}
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static void rdpsnd_pulse_start(rdpsndDevicePlugin* device)
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{
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rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
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if (!pulse->stream)
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return;
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pa_stream_trigger(pulse->stream, NULL, NULL);
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}
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int FreeRDPRdpsndDeviceEntry(PFREERDP_RDPSND_DEVICE_ENTRY_POINTS pEntryPoints)
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{
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rdpsndPulsePlugin* pulse;
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RDP_PLUGIN_DATA* data;
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pulse = xnew(rdpsndPulsePlugin);
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pulse->device.Open = rdpsnd_pulse_open;
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pulse->device.FormatSupported = rdpsnd_pulse_format_supported;
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pulse->device.SetFormat = rdpsnd_pulse_set_format;
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pulse->device.SetVolume = rdpsnd_pulse_set_volume;
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pulse->device.Play = rdpsnd_pulse_play;
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pulse->device.Start = rdpsnd_pulse_start;
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pulse->device.Close = rdpsnd_pulse_close;
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pulse->device.Free = rdpsnd_pulse_free;
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data = pEntryPoints->plugin_data;
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if (data && strcmp((char*)data->data[0], "pulse") == 0)
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{
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if(strlen((char*)data->data[1]) > 0)
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pulse->device_name = xstrdup((char*)data->data[1]);
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else
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pulse->device_name = NULL;
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}
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pulse->mainloop = pa_threaded_mainloop_new();
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if (!pulse->mainloop)
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{
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DEBUG_WARN("pa_threaded_mainloop_new failed");
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rdpsnd_pulse_free((rdpsndDevicePlugin*)pulse);
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return 1;
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}
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pulse->context = pa_context_new(pa_threaded_mainloop_get_api(pulse->mainloop), "freerdp");
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if (!pulse->context)
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{
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DEBUG_WARN("pa_context_new failed");
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rdpsnd_pulse_free((rdpsndDevicePlugin*)pulse);
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return 1;
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}
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pa_context_set_state_callback(pulse->context, rdpsnd_pulse_context_state_callback, pulse);
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if (!rdpsnd_pulse_connect((rdpsndDevicePlugin*)pulse))
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{
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DEBUG_WARN("rdpsnd_pulse_connect failed");
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rdpsnd_pulse_free((rdpsndDevicePlugin*)pulse);
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return 1;
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}
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pEntryPoints->pRegisterRdpsndDevice(pEntryPoints->rdpsnd, (rdpsndDevicePlugin*)pulse);
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return 0;
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}
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