clang's C11 atomic_fetch_*() functions only take a C11 atomic type pointer argument. QEMU uses direct types (int, etc) and this causes a compiler error when a QEMU code calls these functions in a source file that also included <stdatomic.h> via a system header file: $ CC=clang CXX=clang++ ./configure ... && make ../util/async.c:79:17: error: address argument to atomic operation must be a pointer to _Atomic type ('unsigned int *' invalid) Avoid using atomic_*() names in QEMU's atomic.h since that namespace is used by <stdatomic.h>. Prefix QEMU's APIs with 'q' so that atomic.h and <stdatomic.h> can co-exist. I checked /usr/include on my machine and searched GitHub for existing "qatomic_" users but there seem to be none. This patch was generated using: $ git grep -h -o '\<atomic\(64\)\?_[a-z0-9_]\+' include/qemu/atomic.h | \ sort -u >/tmp/changed_identifiers $ for identifier in $(</tmp/changed_identifiers); do sed -i "s%\<$identifier\>%q$identifier%g" \ $(git grep -I -l "\<$identifier\>") done I manually fixed line-wrap issues and misaligned rST tables. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200923105646.47864-1-stefanha@redhat.com>
671 lines
16 KiB
C
671 lines
16 KiB
C
/*
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* QEMU JACK Audio Connection Kit Client
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*
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* Copyright (c) 2020 Geoffrey McRae (gnif)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/module.h"
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#include "qemu/atomic.h"
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#include "qemu-common.h"
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#include "audio.h"
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#define AUDIO_CAP "jack"
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#include "audio_int.h"
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#include <jack/jack.h>
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#include <jack/thread.h>
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struct QJack;
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typedef enum QJackState {
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QJACK_STATE_DISCONNECTED,
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QJACK_STATE_RUNNING,
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QJACK_STATE_SHUTDOWN
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}
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QJackState;
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typedef struct QJackBuffer {
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int channels;
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int frames;
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uint32_t used;
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int rptr, wptr;
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float **data;
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}
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QJackBuffer;
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typedef struct QJackClient {
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AudiodevJackPerDirectionOptions *opt;
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bool out;
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bool enabled;
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bool connect_ports;
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int packets;
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QJackState state;
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jack_client_t *client;
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jack_nframes_t freq;
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struct QJack *j;
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int nchannels;
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int buffersize;
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jack_port_t **port;
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QJackBuffer fifo;
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}
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QJackClient;
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typedef struct QJackOut {
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HWVoiceOut hw;
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QJackClient c;
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}
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QJackOut;
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typedef struct QJackIn {
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HWVoiceIn hw;
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QJackClient c;
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}
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QJackIn;
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static int qjack_client_init(QJackClient *c);
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static void qjack_client_connect_ports(QJackClient *c);
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static void qjack_client_fini(QJackClient *c);
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static void qjack_buffer_create(QJackBuffer *buffer, int channels, int frames)
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{
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buffer->channels = channels;
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buffer->frames = frames;
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buffer->used = 0;
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buffer->rptr = 0;
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buffer->wptr = 0;
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buffer->data = g_malloc(channels * sizeof(float *));
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for (int i = 0; i < channels; ++i) {
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buffer->data[i] = g_malloc(frames * sizeof(float));
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}
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}
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static void qjack_buffer_clear(QJackBuffer *buffer)
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{
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assert(buffer->data);
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qatomic_store_release(&buffer->used, 0);
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buffer->rptr = 0;
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buffer->wptr = 0;
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}
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static void qjack_buffer_free(QJackBuffer *buffer)
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{
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if (!buffer->data) {
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return;
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}
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for (int i = 0; i < buffer->channels; ++i) {
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g_free(buffer->data[i]);
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}
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g_free(buffer->data);
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buffer->data = NULL;
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}
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/* write PCM interleaved */
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static int qjack_buffer_write(QJackBuffer *buffer, float *data, int size)
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{
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assert(buffer->data);
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const int samples = size / sizeof(float);
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int frames = samples / buffer->channels;
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const int avail = buffer->frames - qatomic_load_acquire(&buffer->used);
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if (frames > avail) {
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frames = avail;
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}
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int copy = frames;
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int wptr = buffer->wptr;
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while (copy) {
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for (int c = 0; c < buffer->channels; ++c) {
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buffer->data[c][wptr] = *data++;
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}
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if (++wptr == buffer->frames) {
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wptr = 0;
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}
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--copy;
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}
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buffer->wptr = wptr;
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qatomic_add(&buffer->used, frames);
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return frames * buffer->channels * sizeof(float);
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};
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/* write PCM linear */
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static int qjack_buffer_write_l(QJackBuffer *buffer, float **dest, int frames)
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{
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assert(buffer->data);
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const int avail = buffer->frames - qatomic_load_acquire(&buffer->used);
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int wptr = buffer->wptr;
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if (frames > avail) {
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frames = avail;
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}
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int right = buffer->frames - wptr;
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if (right > frames) {
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right = frames;
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}
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const int left = frames - right;
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for (int c = 0; c < buffer->channels; ++c) {
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memcpy(buffer->data[c] + wptr, dest[c] , right * sizeof(float));
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memcpy(buffer->data[c] , dest[c] + right, left * sizeof(float));
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}
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wptr += frames;
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if (wptr >= buffer->frames) {
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wptr -= buffer->frames;
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}
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buffer->wptr = wptr;
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qatomic_add(&buffer->used, frames);
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return frames;
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}
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/* read PCM interleaved */
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static int qjack_buffer_read(QJackBuffer *buffer, float *dest, int size)
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{
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assert(buffer->data);
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const int samples = size / sizeof(float);
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int frames = samples / buffer->channels;
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const int avail = qatomic_load_acquire(&buffer->used);
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if (frames > avail) {
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frames = avail;
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}
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int copy = frames;
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int rptr = buffer->rptr;
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while (copy) {
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for (int c = 0; c < buffer->channels; ++c) {
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*dest++ = buffer->data[c][rptr];
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}
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if (++rptr == buffer->frames) {
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rptr = 0;
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}
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--copy;
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}
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buffer->rptr = rptr;
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qatomic_sub(&buffer->used, frames);
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return frames * buffer->channels * sizeof(float);
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}
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/* read PCM linear */
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static int qjack_buffer_read_l(QJackBuffer *buffer, float **dest, int frames)
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{
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assert(buffer->data);
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int copy = frames;
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const int used = qatomic_load_acquire(&buffer->used);
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int rptr = buffer->rptr;
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if (copy > used) {
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copy = used;
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}
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int right = buffer->frames - rptr;
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if (right > copy) {
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right = copy;
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}
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const int left = copy - right;
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for (int c = 0; c < buffer->channels; ++c) {
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memcpy(dest[c] , buffer->data[c] + rptr, right * sizeof(float));
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memcpy(dest[c] + right, buffer->data[c] , left * sizeof(float));
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}
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rptr += copy;
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if (rptr >= buffer->frames) {
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rptr -= buffer->frames;
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}
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buffer->rptr = rptr;
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qatomic_sub(&buffer->used, copy);
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return copy;
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}
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static int qjack_process(jack_nframes_t nframes, void *arg)
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{
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QJackClient *c = (QJackClient *)arg;
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if (c->state != QJACK_STATE_RUNNING) {
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return 0;
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}
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/* get the buffers for the ports */
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float *buffers[c->nchannels];
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for (int i = 0; i < c->nchannels; ++i) {
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buffers[i] = jack_port_get_buffer(c->port[i], nframes);
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}
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if (c->out) {
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if (likely(c->enabled)) {
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qjack_buffer_read_l(&c->fifo, buffers, nframes);
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} else {
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for(int i = 0; i < c->nchannels; ++i) {
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memset(buffers[i], 0, nframes * sizeof(float));
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}
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}
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} else {
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if (likely(c->enabled)) {
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qjack_buffer_write_l(&c->fifo, buffers, nframes);
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}
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}
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return 0;
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}
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static void qjack_port_registration(jack_port_id_t port, int reg, void *arg)
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{
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if (reg) {
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QJackClient *c = (QJackClient *)arg;
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c->connect_ports = true;
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}
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}
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static int qjack_xrun(void *arg)
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{
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QJackClient *c = (QJackClient *)arg;
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if (c->state != QJACK_STATE_RUNNING) {
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return 0;
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}
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qjack_buffer_clear(&c->fifo);
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return 0;
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}
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static void qjack_shutdown(void *arg)
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{
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QJackClient *c = (QJackClient *)arg;
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c->state = QJACK_STATE_SHUTDOWN;
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}
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static void qjack_client_recover(QJackClient *c)
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{
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if (c->state == QJACK_STATE_SHUTDOWN) {
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qjack_client_fini(c);
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}
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/* packets is used simply to throttle this */
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if (c->state == QJACK_STATE_DISCONNECTED &&
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c->packets % 100 == 0) {
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/* if enabled then attempt to recover */
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if (c->enabled) {
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dolog("attempting to reconnect to server\n");
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qjack_client_init(c);
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}
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}
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}
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static size_t qjack_write(HWVoiceOut *hw, void *buf, size_t len)
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{
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QJackOut *jo = (QJackOut *)hw;
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++jo->c.packets;
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if (jo->c.state != QJACK_STATE_RUNNING) {
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qjack_client_recover(&jo->c);
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return len;
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}
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qjack_client_connect_ports(&jo->c);
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return qjack_buffer_write(&jo->c.fifo, buf, len);
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}
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static size_t qjack_read(HWVoiceIn *hw, void *buf, size_t len)
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{
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QJackIn *ji = (QJackIn *)hw;
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++ji->c.packets;
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if (ji->c.state != QJACK_STATE_RUNNING) {
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qjack_client_recover(&ji->c);
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return len;
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}
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qjack_client_connect_ports(&ji->c);
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return qjack_buffer_read(&ji->c.fifo, buf, len);
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}
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static void qjack_client_connect_ports(QJackClient *c)
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{
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if (!c->connect_ports || !c->opt->connect_ports) {
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return;
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}
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c->connect_ports = false;
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const char **ports;
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ports = jack_get_ports(c->client, c->opt->connect_ports, NULL,
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c->out ? JackPortIsInput : JackPortIsOutput);
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if (!ports) {
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return;
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}
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for (int i = 0; i < c->nchannels && ports[i]; ++i) {
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const char *p = jack_port_name(c->port[i]);
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if (jack_port_connected_to(c->port[i], ports[i])) {
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continue;
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}
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if (c->out) {
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dolog("connect %s -> %s\n", p, ports[i]);
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jack_connect(c->client, p, ports[i]);
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} else {
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dolog("connect %s -> %s\n", ports[i], p);
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jack_connect(c->client, ports[i], p);
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}
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}
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}
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static int qjack_client_init(QJackClient *c)
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{
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jack_status_t status;
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char client_name[jack_client_name_size()];
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jack_options_t options = JackNullOption;
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if (c->state == QJACK_STATE_RUNNING) {
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return 0;
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}
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c->connect_ports = true;
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snprintf(client_name, sizeof(client_name), "%s-%s",
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c->out ? "out" : "in",
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c->opt->client_name ? c->opt->client_name : qemu_get_vm_name());
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if (c->opt->exact_name) {
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options |= JackUseExactName;
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}
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if (!c->opt->start_server) {
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options |= JackNoStartServer;
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}
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if (c->opt->server_name) {
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options |= JackServerName;
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}
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c->client = jack_client_open(client_name, options, &status,
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c->opt->server_name);
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if (c->client == NULL) {
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dolog("jack_client_open failed: status = 0x%2.0x\n", status);
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if (status & JackServerFailed) {
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dolog("unable to connect to JACK server\n");
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}
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return -1;
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}
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c->freq = jack_get_sample_rate(c->client);
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if (status & JackServerStarted) {
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dolog("JACK server started\n");
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}
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if (status & JackNameNotUnique) {
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dolog("JACK unique name assigned %s\n",
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jack_get_client_name(c->client));
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}
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jack_set_process_callback(c->client, qjack_process , c);
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jack_set_port_registration_callback(c->client, qjack_port_registration, c);
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jack_set_xrun_callback(c->client, qjack_xrun, c);
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jack_on_shutdown(c->client, qjack_shutdown, c);
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/* allocate and register the ports */
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c->port = g_malloc(sizeof(jack_port_t *) * c->nchannels);
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for (int i = 0; i < c->nchannels; ++i) {
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char port_name[16];
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snprintf(
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port_name,
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sizeof(port_name),
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c->out ? "output %d" : "input %d",
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i);
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c->port[i] = jack_port_register(
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c->client,
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port_name,
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JACK_DEFAULT_AUDIO_TYPE,
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c->out ? JackPortIsOutput : JackPortIsInput,
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0);
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}
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/* activate the session */
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jack_activate(c->client);
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c->buffersize = jack_get_buffer_size(c->client);
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/*
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* ensure the buffersize is no smaller then 512 samples, some (all?) qemu
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* virtual devices do not work correctly otherwise
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*/
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if (c->buffersize < 512) {
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c->buffersize = 512;
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}
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/* create a 2 period buffer */
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qjack_buffer_create(&c->fifo, c->nchannels, c->buffersize * 2);
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qjack_client_connect_ports(c);
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c->state = QJACK_STATE_RUNNING;
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return 0;
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}
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static int qjack_init_out(HWVoiceOut *hw, struct audsettings *as,
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void *drv_opaque)
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{
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QJackOut *jo = (QJackOut *)hw;
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Audiodev *dev = (Audiodev *)drv_opaque;
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qjack_client_fini(&jo->c);
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jo->c.out = true;
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jo->c.enabled = false;
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jo->c.nchannels = as->nchannels;
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jo->c.opt = dev->u.jack.out;
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int ret = qjack_client_init(&jo->c);
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if (ret != 0) {
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return ret;
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}
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/* report the buffer size to qemu */
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hw->samples = jo->c.buffersize;
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/* report the audio format we support */
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struct audsettings os = {
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.freq = jo->c.freq,
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.nchannels = jo->c.nchannels,
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.fmt = AUDIO_FORMAT_F32,
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.endianness = 0
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};
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audio_pcm_init_info(&hw->info, &os);
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dolog("JACK output configured for %dHz (%d samples)\n",
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jo->c.freq, jo->c.buffersize);
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return 0;
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}
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static int qjack_init_in(HWVoiceIn *hw, struct audsettings *as,
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void *drv_opaque)
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{
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QJackIn *ji = (QJackIn *)hw;
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Audiodev *dev = (Audiodev *)drv_opaque;
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qjack_client_fini(&ji->c);
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ji->c.out = false;
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ji->c.enabled = false;
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ji->c.nchannels = as->nchannels;
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ji->c.opt = dev->u.jack.in;
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int ret = qjack_client_init(&ji->c);
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if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
/* report the buffer size to qemu */
|
|
hw->samples = ji->c.buffersize;
|
|
|
|
/* report the audio format we support */
|
|
struct audsettings is = {
|
|
.freq = ji->c.freq,
|
|
.nchannels = ji->c.nchannels,
|
|
.fmt = AUDIO_FORMAT_F32,
|
|
.endianness = 0
|
|
};
|
|
audio_pcm_init_info(&hw->info, &is);
|
|
|
|
dolog("JACK input configured for %dHz (%d samples)\n",
|
|
ji->c.freq, ji->c.buffersize);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void qjack_client_fini(QJackClient *c)
|
|
{
|
|
switch (c->state) {
|
|
case QJACK_STATE_RUNNING:
|
|
jack_deactivate(c->client);
|
|
/* fallthrough */
|
|
|
|
case QJACK_STATE_SHUTDOWN:
|
|
jack_client_close(c->client);
|
|
/* fallthrough */
|
|
|
|
case QJACK_STATE_DISCONNECTED:
|
|
break;
|
|
}
|
|
|
|
qjack_buffer_free(&c->fifo);
|
|
g_free(c->port);
|
|
|
|
c->state = QJACK_STATE_DISCONNECTED;
|
|
}
|
|
|
|
static void qjack_fini_out(HWVoiceOut *hw)
|
|
{
|
|
QJackOut *jo = (QJackOut *)hw;
|
|
qjack_client_fini(&jo->c);
|
|
}
|
|
|
|
static void qjack_fini_in(HWVoiceIn *hw)
|
|
{
|
|
QJackIn *ji = (QJackIn *)hw;
|
|
qjack_client_fini(&ji->c);
|
|
}
|
|
|
|
static void qjack_enable_out(HWVoiceOut *hw, bool enable)
|
|
{
|
|
QJackOut *jo = (QJackOut *)hw;
|
|
jo->c.enabled = enable;
|
|
}
|
|
|
|
static void qjack_enable_in(HWVoiceIn *hw, bool enable)
|
|
{
|
|
QJackIn *ji = (QJackIn *)hw;
|
|
ji->c.enabled = enable;
|
|
}
|
|
|
|
static int qjack_thread_creator(jack_native_thread_t *thread,
|
|
const pthread_attr_t *attr, void *(*function)(void *), void *arg)
|
|
{
|
|
int ret = pthread_create(thread, attr, function, arg);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
/* set the name of the thread */
|
|
pthread_setname_np(*thread, "jack-client");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void *qjack_init(Audiodev *dev)
|
|
{
|
|
assert(dev->driver == AUDIODEV_DRIVER_JACK);
|
|
return dev;
|
|
}
|
|
|
|
static void qjack_fini(void *opaque)
|
|
{
|
|
}
|
|
|
|
static struct audio_pcm_ops jack_pcm_ops = {
|
|
.init_out = qjack_init_out,
|
|
.fini_out = qjack_fini_out,
|
|
.write = qjack_write,
|
|
.run_buffer_out = audio_generic_run_buffer_out,
|
|
.enable_out = qjack_enable_out,
|
|
|
|
.init_in = qjack_init_in,
|
|
.fini_in = qjack_fini_in,
|
|
.read = qjack_read,
|
|
.enable_in = qjack_enable_in
|
|
};
|
|
|
|
static struct audio_driver jack_driver = {
|
|
.name = "jack",
|
|
.descr = "JACK Audio Connection Kit Client",
|
|
.init = qjack_init,
|
|
.fini = qjack_fini,
|
|
.pcm_ops = &jack_pcm_ops,
|
|
.can_be_default = 1,
|
|
.max_voices_out = INT_MAX,
|
|
.max_voices_in = INT_MAX,
|
|
.voice_size_out = sizeof(QJackOut),
|
|
.voice_size_in = sizeof(QJackIn)
|
|
};
|
|
|
|
static void qjack_error(const char *msg)
|
|
{
|
|
dolog("E: %s\n", msg);
|
|
}
|
|
|
|
static void qjack_info(const char *msg)
|
|
{
|
|
dolog("I: %s\n", msg);
|
|
}
|
|
|
|
static void register_audio_jack(void)
|
|
{
|
|
audio_driver_register(&jack_driver);
|
|
jack_set_thread_creator(qjack_thread_creator);
|
|
jack_set_error_function(qjack_error);
|
|
jack_set_info_function(qjack_info);
|
|
}
|
|
type_init(register_audio_jack);
|