mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-31 22:25:35 -04:00
- added SYNC_PTR ioctl support for pcm_hw plugin
This commit is contained in:
Jaroslav Kysela
parent
5a2c2e0295
commit
eafb492512
7 changed files with 186 additions and 63 deletions
220
src/pcm/pcm_hw.c
220
src/pcm/pcm_hw.c
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@ -89,8 +89,10 @@ typedef struct {
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int fd;
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int card, device, subdevice;
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int mmap_emulation;
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int sync_ptr_ioctl;
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volatile struct sndrv_pcm_mmap_status * mmap_status;
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struct sndrv_pcm_mmap_control *mmap_control;
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struct sndrv_pcm_sync_ptr *sync_ptr;
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int shadow_appl_ptr: 1,
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avail_update_flag: 1,
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mmap_shm: 1;
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@ -109,9 +111,9 @@ typedef struct {
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((enum sndrv_pcm_state) (hw)->mmap_status->state)
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#define FAST_PCM_TSTAMP(hw) \
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((hw)->mmap_status->tstamp)
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#endif /* DOC_HIDDEN */
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struct timespec snd_pcm_hw_fast_tstamp(snd_pcm_t *pcm)
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{
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struct timespec res;
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@ -122,6 +124,24 @@ struct timespec snd_pcm_hw_fast_tstamp(snd_pcm_t *pcm)
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return res;
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}
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static int sync_ptr1(snd_pcm_hw_t *hw, unsigned int flags)
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{
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int err;
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hw->sync_ptr->flags = flags;
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err = ioctl((hw)->fd, SNDRV_PCM_IOCTL_SYNC_PTR, (hw)->sync_ptr);
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if (err < 0) {
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(err) = -errno;
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SYSERR("SNDRV_PCM_IOCTL_SYNC_PTR failed");
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return err;
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}
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return 0;
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}
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static inline int sync_ptr(snd_pcm_hw_t *hw, unsigned int flags)
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{
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return hw->sync_ptr ? sync_ptr1(hw, flags) : 0;
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}
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static int snd_pcm_hw_nonblock(snd_pcm_t *pcm, int nonblock)
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{
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long flags;
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@ -325,6 +345,9 @@ static int snd_pcm_hw_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
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return err;
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}
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}
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err = sync_ptr(hw, 0);
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if (err < 0)
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return err;
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if (pcm->stream == SND_PCM_STREAM_CAPTURE) {
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if (hw->mmap_shm) {
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hw->shadow_appl_ptr = 1;
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@ -363,13 +386,14 @@ static int snd_pcm_hw_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t * params)
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params->silence_threshold == pcm->silence_threshold &&
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params->silence_size == pcm->silence_size) {
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hw->mmap_control->avail_min = params->avail_min;
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return 0;
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return sync_ptr(hw, 0);
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}
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if (ioctl(fd, SNDRV_PCM_IOCTL_SW_PARAMS, params) < 0) {
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err = -errno;
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SYSERR("SNDRV_PCM_IOCTL_SW_PARAMS failed");
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return err;
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}
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hw->mmap_control->avail_min = params->avail_min;
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return 0;
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}
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@ -416,6 +440,9 @@ static int snd_pcm_hw_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
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static snd_pcm_state_t snd_pcm_hw_state(snd_pcm_t *pcm)
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{
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snd_pcm_hw_t *hw = pcm->private_data;
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int err = sync_ptr_lite(hw, 0);
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if (err < 0)
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return err;
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return (snd_pcm_state_t) hw->mmap_status->state;
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}
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@ -423,6 +450,28 @@ static int snd_pcm_hw_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
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{
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd, err;
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if (hw->sync_ptr) {
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err = sync_ptr1(hw, SNDRV_PCM_SYNC_PTR_HWSYNC);
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if (err < 0)
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return err;
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switch (FAST_PCM_STATE(hw)) {
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case SNDRV_PCM_STATE_RUNNING:
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case SNDRV_PCM_STATE_DRAINING:
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case SNDRV_PCM_STATE_PAUSED:
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case SNDRV_PCM_STATE_PREPARED:
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case SNDRV_PCM_STATE_SUSPENDED:
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break;
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case SNDRV_PCM_STATE_XRUN:
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return -EPIPE;
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default:
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return -EBADFD;
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}
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if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
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*delayp = snd_pcm_mmap_playback_hw_avail(pcm);
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else
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*delayp = snd_pcm_mmap_capture_avail(pcm);
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return 0;
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}
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if (ioctl(fd, SNDRV_PCM_IOCTL_DELAY, delayp) < 0) {
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err = -errno;
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// SYSERR("SNDRV_PCM_IOCTL_DELAY failed");
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@ -436,16 +485,22 @@ static int snd_pcm_hw_hwsync(snd_pcm_t *pcm)
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd, err;
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if (SNDRV_PROTOCOL_VERSION(2, 0, 3) <= hw->version) {
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if (ioctl(fd, SNDRV_PCM_IOCTL_HWSYNC) < 0) {
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err = -errno;
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// SYSERR("SNDRV_PCM_IOCTL_HWSYNC failed");
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return err;
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if (hw->sync_ptr) {
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err = sync_ptr1(hw, SNDRV_PCM_SYNC_PTR_HWSYNC);
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if (err < 0)
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return err;
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} else {
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if (ioctl(fd, SNDRV_PCM_IOCTL_HWSYNC) < 0) {
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err = -errno;
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// SYSERR("SNDRV_PCM_IOCTL_HWSYNC failed");
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return err;
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}
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}
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} else {
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snd_pcm_sframes_t delay;
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int err = snd_pcm_hw_delay(pcm, &delay);
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if (err < 0) {
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switch (snd_pcm_state(pcm)) {
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switch (FAST_PCM_STATE(hw)) {
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case SND_PCM_STATE_PREPARED:
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case SND_PCM_STATE_SUSPENDED:
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return 0;
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@ -466,7 +521,7 @@ static int snd_pcm_hw_prepare(snd_pcm_t *pcm)
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SYSERR("SNDRV_PCM_IOCTL_PREPARE failed");
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return err;
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}
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return 0;
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return sync_ptr(hw, 0);
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}
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static int snd_pcm_hw_reset(snd_pcm_t *pcm)
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@ -478,7 +533,7 @@ static int snd_pcm_hw_reset(snd_pcm_t *pcm)
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SYSERR("SNDRV_PCM_IOCTL_RESET failed");
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return err;
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}
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return 0;
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return sync_ptr(hw, 0);
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}
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static int snd_pcm_hw_start(snd_pcm_t *pcm)
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@ -564,6 +619,9 @@ static snd_pcm_sframes_t snd_pcm_hw_forward(snd_pcm_t *pcm, snd_pcm_uframes_t fr
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} else {
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snd_pcm_sframes_t avail;
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err = sync_ptr(hw, SNDRV_PCM_SYNC_PTR_HWSYNC);
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if (err < 0)
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return err;
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switch (FAST_PCM_STATE(hw)) {
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case SNDRV_PCM_STATE_RUNNING:
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case SNDRV_PCM_STATE_DRAINING:
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@ -581,6 +639,9 @@ static snd_pcm_sframes_t snd_pcm_hw_forward(snd_pcm_t *pcm, snd_pcm_uframes_t fr
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if (frames > (snd_pcm_uframes_t)avail)
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frames = avail;
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snd_pcm_mmap_appl_forward(pcm, frames);
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err = sync_ptr(hw, 0);
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if (err < 0)
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return err;
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return frames;
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}
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}
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@ -600,54 +661,54 @@ static int snd_pcm_hw_resume(snd_pcm_t *pcm)
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static snd_pcm_sframes_t snd_pcm_hw_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)
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{
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int result, err;
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int err;
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd;
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struct sndrv_xferi xferi;
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xferi.buf = (char*) buffer;
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xferi.frames = size;
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result = ioctl(fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &xferi);
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err = -errno;
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err = ioctl(fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &xferi);
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err = err >= 0 ? sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL) : -errno;
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#ifdef DEBUG_RW
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fprintf(stderr, "hw_writei: frames = %li, result = %i, result = %li\n", size, result, xferi.result);
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fprintf(stderr, "hw_writei: frames = %li, xferi.result = %li, err = %i\n", size, xferi.result, err);
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#endif
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if (result < 0)
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if (err < 0)
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return snd_pcm_check_error(pcm, err);
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return xferi.result;
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}
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static snd_pcm_sframes_t snd_pcm_hw_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
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{
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int result, err;
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int err;
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd;
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struct sndrv_xfern xfern;
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xfern.bufs = bufs;
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xfern.frames = size;
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result = ioctl(fd, SNDRV_PCM_IOCTL_WRITEN_FRAMES, &xfern);
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err = -errno;
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err = ioctl(fd, SNDRV_PCM_IOCTL_WRITEN_FRAMES, &xfern);
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err = err >= 0 ? sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL) : -errno;
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#ifdef DEBUG_RW
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fprintf(stderr, "hw_writen: frames = %li, result = %i, result = %li\n", size, result, xfern.result);
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fprintf(stderr, "hw_writen: frames = %li, result = %li, err = %i\n", size, xfern.result, err);
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#endif
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if (result < 0)
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if (err < 0)
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return snd_pcm_check_error(pcm, err);
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return xfern.result;
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}
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static snd_pcm_sframes_t snd_pcm_hw_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)
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{
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int result, err;
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int err;
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd;
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struct sndrv_xferi xferi;
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xferi.buf = buffer;
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xferi.frames = size;
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result = ioctl(fd, SNDRV_PCM_IOCTL_READI_FRAMES, &xferi);
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err = -errno;
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err = ioctl(fd, SNDRV_PCM_IOCTL_READI_FRAMES, &xferi);
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err = err >= 0 ? sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL) : -errno;
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#ifdef DEBUG_RW
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fprintf(stderr, "hw_readi: frames = %li, result = %i, result = %li\n", size, result, xferi.result);
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fprintf(stderr, "hw_readi: frames = %li, result = %li, err = %i\n", size, xferi.result, err);
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#endif
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if (result < 0)
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if (err < 0)
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return snd_pcm_check_error(pcm, err);
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UPDATE_SHADOW_PTR(hw);
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return xferi.result;
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@ -655,18 +716,18 @@ static snd_pcm_sframes_t snd_pcm_hw_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_
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static snd_pcm_sframes_t snd_pcm_hw_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
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{
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int result, err;
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int err;
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snd_pcm_hw_t *hw = pcm->private_data;
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int fd = hw->fd;
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struct sndrv_xfern xfern;
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xfern.bufs = bufs;
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xfern.frames = size;
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result = ioctl(fd, SNDRV_PCM_IOCTL_READN_FRAMES, &xfern);
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err = -errno;
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err = ioctl(fd, SNDRV_PCM_IOCTL_READN_FRAMES, &xfern);
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err = err >= 0 ? sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL) : -errno;
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#ifdef DEBUG_RW
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fprintf(stderr, "hw_readn: frames = %li, result = %i, result = %li\n", size, result, xfern.result);
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fprintf(stderr, "hw_readn: frames = %li, result = %li, err = %i\n", size, xfern.result, err);
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#endif
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if (result < 0)
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if (err < 0)
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return snd_pcm_check_error(pcm, err);
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UPDATE_SHADOW_PTR(hw);
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return xfern.result;
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@ -675,17 +736,33 @@ static snd_pcm_sframes_t snd_pcm_hw_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_u
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static int snd_pcm_hw_mmap_status(snd_pcm_t *pcm)
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{
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snd_pcm_hw_t *hw = pcm->private_data;
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struct sndrv_pcm_sync_ptr sync_ptr;
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void *ptr;
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int err;
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ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_status)),
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PROT_READ, MAP_FILE|MAP_SHARED,
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hw->fd, SNDRV_PCM_MMAP_OFFSET_STATUS);
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ptr = MAP_FAILED;
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if (hw->sync_ptr_ioctl == 0)
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ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_status)),
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PROT_READ, MAP_FILE|MAP_SHARED,
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hw->fd, SNDRV_PCM_MMAP_OFFSET_STATUS);
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if (ptr == MAP_FAILED || ptr == NULL) {
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err = -errno;
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SYSERR("status mmap failed");
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return err;
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memset(&sync_ptr, 0, sizeof(sync_ptr));
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sync_ptr.c.control.appl_ptr = 0;
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sync_ptr.c.control.avail_min = 1;
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err = ioctl(hw->fd, SNDRV_PCM_IOCTL_SYNC_PTR, &sync_ptr);
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if (err < 0) {
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err = -errno;
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SYSERR("SNDRV_PCM_IOCTL_SYNC_PTR failed");
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return err;
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}
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hw->sync_ptr = calloc(1, sizeof(struct sndrv_pcm_sync_ptr));
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if (hw->sync_ptr == NULL)
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return -ENOMEM;
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hw->mmap_status = &hw->sync_ptr->s.status;
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hw->mmap_control = &hw->sync_ptr->c.control;
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hw->sync_ptr_ioctl = 1;
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} else {
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hw->mmap_status = ptr;
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}
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hw->mmap_status = ptr;
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snd_pcm_set_hw_ptr(pcm, &hw->mmap_status->hw_ptr, hw->fd, SNDRV_PCM_MMAP_OFFSET_STATUS + offsetof(struct sndrv_pcm_mmap_status, hw_ptr));
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return 0;
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}
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@ -695,15 +772,19 @@ static int snd_pcm_hw_mmap_control(snd_pcm_t *pcm)
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snd_pcm_hw_t *hw = pcm->private_data;
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void *ptr;
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int err;
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ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_control)),
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PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED,
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hw->fd, SNDRV_PCM_MMAP_OFFSET_CONTROL);
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if (ptr == MAP_FAILED || ptr == NULL) {
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err = -errno;
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SYSERR("control mmap failed");
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return err;
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if (hw->sync_ptr == NULL) {
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ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_control)),
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PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED,
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hw->fd, SNDRV_PCM_MMAP_OFFSET_CONTROL);
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if (ptr == MAP_FAILED || ptr == NULL) {
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err = -errno;
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SYSERR("control mmap failed");
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return err;
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}
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hw->mmap_control = ptr;
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} else {
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hw->mmap_control->avail_min = 1;
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}
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hw->mmap_control = ptr;
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snd_pcm_set_appl_ptr(pcm, &hw->mmap_control->appl_ptr, hw->fd, SNDRV_PCM_MMAP_OFFSET_CONTROL);
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return 0;
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}
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@ -712,10 +793,17 @@ static int snd_pcm_hw_munmap_status(snd_pcm_t *pcm)
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{
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snd_pcm_hw_t *hw = pcm->private_data;
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int err;
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if (munmap((void*)hw->mmap_status, page_align(sizeof(*hw->mmap_status))) < 0) {
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err = -errno;
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SYSERR("status munmap failed");
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return err;
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if (hw->sync_ptr_ioctl) {
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if (hw->sync_ptr) {
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free(hw->sync_ptr);
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hw->sync_ptr = NULL;
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}
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} else {
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if (munmap((void*)hw->mmap_status, page_align(sizeof(*hw->mmap_status))) < 0) {
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err = -errno;
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SYSERR("status munmap failed");
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return err;
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}
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}
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return 0;
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}
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@ -724,10 +812,17 @@ static int snd_pcm_hw_munmap_control(snd_pcm_t *pcm)
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{
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snd_pcm_hw_t *hw = pcm->private_data;
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int err;
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if (munmap(hw->mmap_control, page_align(sizeof(*hw->mmap_control))) < 0) {
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err = -errno;
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SYSERR("control munmap failed");
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return err;
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if (hw->sync_ptr_ioctl) {
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if (hw->sync_ptr) {
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free(hw->sync_ptr);
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hw->sync_ptr = NULL;
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}
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} else {
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if (munmap(hw->mmap_control, page_align(sizeof(*hw->mmap_control))) < 0) {
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err = -errno;
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SYSERR("control munmap failed");
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return err;
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}
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}
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return 0;
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}
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@ -892,7 +987,7 @@ static snd_pcm_fast_ops_t snd_pcm_hw_fast_ops = {
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* changed in future.
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*/
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int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name,
|
||||
int fd, int mmap_emulation)
|
||||
int fd, int mmap_emulation, int sync_ptr_ioctl)
|
||||
{
|
||||
int ver;
|
||||
long fmode;
|
||||
|
|
@ -966,6 +1061,7 @@ int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name,
|
|||
hw->subdevice = info.subdevice;
|
||||
hw->fd = fd;
|
||||
hw->mmap_emulation = mmap_emulation;
|
||||
hw->sync_ptr_ioctl = sync_ptr_ioctl;
|
||||
|
||||
ret = snd_pcm_new(&pcm, SND_PCM_TYPE_HW, name, info.stream, mode);
|
||||
if (ret < 0) {
|
||||
|
|
@ -1004,6 +1100,8 @@ int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name,
|
|||
* \param subdevice Number of subdevice
|
||||
* \param stream PCM Stream
|
||||
* \param mode PCM Mode
|
||||
* \param mmap_emulation Emulate mmap access using standard r/w access
|
||||
* \param sync_ptr_ioctl Use SYNC_PTR ioctl rather than mmap for control structures
|
||||
* \retval zero on success otherwise a negative error code
|
||||
* \warning Using of this function might be dangerous in the sense
|
||||
* of compatibility reasons. The prototype might be freely
|
||||
|
|
@ -1012,7 +1110,7 @@ int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name,
|
|||
int snd_pcm_hw_open(snd_pcm_t **pcmp, const char *name,
|
||||
int card, int device, int subdevice,
|
||||
snd_pcm_stream_t stream, int mode,
|
||||
int mmap_emulation)
|
||||
int mmap_emulation, int sync_ptr_ioctl)
|
||||
{
|
||||
char filename[32];
|
||||
const char *filefmt;
|
||||
|
|
@ -1070,7 +1168,7 @@ int snd_pcm_hw_open(snd_pcm_t **pcmp, const char *name,
|
|||
}
|
||||
}
|
||||
snd_ctl_close(ctl);
|
||||
return snd_pcm_hw_open_fd(pcmp, name, fd, mmap_emulation);
|
||||
return snd_pcm_hw_open_fd(pcmp, name, fd, mmap_emulation, sync_ptr_ioctl);
|
||||
|
||||
_err:
|
||||
snd_ctl_close(ctl);
|
||||
|
|
@ -1092,6 +1190,7 @@ pcm.name {
|
|||
[device INT] # Device number (default 0)
|
||||
[subdevice INT] # Subdevice number (default -1: first available)
|
||||
[mmap_emulation BOOL] # Enable mmap emulation for ro/wo devices
|
||||
[sync_ptr_ioctl BOOL] # Use SYNC_PTR ioctl rather than the direct mmap access for control structures
|
||||
}
|
||||
\endcode
|
||||
|
||||
|
|
@ -1123,7 +1222,7 @@ int _snd_pcm_hw_open(snd_pcm_t **pcmp, const char *name,
|
|||
snd_config_iterator_t i, next;
|
||||
long card = -1, device = 0, subdevice = -1;
|
||||
const char *str;
|
||||
int err, mmap_emulation = 0;
|
||||
int err, mmap_emulation = 0, sync_ptr_ioctl = 0;
|
||||
snd_config_for_each(i, next, conf) {
|
||||
snd_config_t *n = snd_config_iterator_entry(i);
|
||||
const char *id;
|
||||
|
|
@ -1170,6 +1269,13 @@ int _snd_pcm_hw_open(snd_pcm_t **pcmp, const char *name,
|
|||
mmap_emulation = err;
|
||||
continue;
|
||||
}
|
||||
if (strcmp(id, "sync_ptr_ioctl") == 0) {
|
||||
err = snd_config_get_bool(n);
|
||||
if (err < 0)
|
||||
continue;
|
||||
sync_ptr_ioctl = err;
|
||||
continue;
|
||||
}
|
||||
SNDERR("Unknown field %s", id);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
|
@ -1177,7 +1283,7 @@ int _snd_pcm_hw_open(snd_pcm_t **pcmp, const char *name,
|
|||
SNDERR("card is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
return snd_pcm_hw_open(pcmp, name, card, device, subdevice, stream, mode, mmap_emulation);
|
||||
return snd_pcm_hw_open(pcmp, name, card, device, subdevice, stream, mode, mmap_emulation, sync_ptr_ioctl);
|
||||
}
|
||||
#ifndef DOC_HIDDEN
|
||||
SND_DLSYM_BUILD_VERSION(_snd_pcm_hw_open, SND_PCM_DLSYM_VERSION);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue