added readv/writev support

diff --git a/include/pcm.h b/include/pcm.h
index 47dd2e0548306a6730c83a14eeb32788198efc81..2797e364cc916de0957fd304be9e730d78964119 100644 (file)
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -42,6 +42,8 @@ int snd_pcm_playback_pause(snd_pcm_t *handle, int enable);
 ssize_t snd_pcm_transfer_size(snd_pcm_t *handle, int channel);
 ssize_t snd_pcm_write(snd_pcm_t *handle, const void *buffer, size_t size);
 ssize_t snd_pcm_read(snd_pcm_t *handle, void *buffer, size_t size);
+ssize_t snd_pcm_writev(snd_pcm_t *pcm, const struct iovec *vector, int count);
+ssize_t snd_pcm_readv(snd_pcm_t *pcm, const struct iovec *vector, int count);
 int snd_pcm_mmap(snd_pcm_t *handle, int channel, snd_pcm_mmap_control_t **control, void **buffer);
 int snd_pcm_munmap(snd_pcm_t *handle, int channel);
 

diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
index 4cb9f01a3a9ee9b502aeb20c8af5e5a1f379c819..99fccae27018368618a69ac1c39dcbedebb624d9 100644 (file)
--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -448,6 +448,29 @@ ssize_t snd_pcm_write(snd_pcm_t *pcm, const void *buffer, size_t size)
        return result;
 }
 
+ssize_t snd_pcm_writev(snd_pcm_t *pcm, const struct iovec *vector, int count)
+{
+       ssize_t result;
+
+       if (!pcm || (!vector && count > 0) || count < 0)
+               return -EINVAL;
+       if (pcm->fd[SND_PCM_CHANNEL_PLAYBACK] < 0)
+               return -EINVAL;
+#if 0
+       result = writev(pcm->fd[SND_PCM_CHANNEL_PLAYBACK], vector, count);
+#else
+       {
+               snd_v_args_t args;
+               args.vector = vector;
+               args.count = count;
+               result = ioctl(pcm->fd[SND_PCM_CHANNEL_PLAYBACK], SND_IOCTL_WRITEV, &args);
+       }
+#endif
+       if (result < 0)
+               return -errno;
+       return result;
+}
+
 ssize_t snd_pcm_read(snd_pcm_t *pcm, void *buffer, size_t size)
 {
        ssize_t result;
@@ -462,6 +485,29 @@ ssize_t snd_pcm_read(snd_pcm_t *pcm, void *buffer, size_t size)
        return result;
 }
 
+ssize_t snd_pcm_readv(snd_pcm_t *pcm, const struct iovec *vector, int count)
+{
+       ssize_t result;
+
+       if (!pcm || (!vector && count > 0) || count < 0)
+               return -EINVAL;
+       if (pcm->fd[SND_PCM_CHANNEL_CAPTURE] < 0)
+               return -EINVAL;
+#if 0
+       result = readv(pcm->fd[SND_PCM_CHANNEL_CAPTURE], vector, count);
+#else
+       {
+               snd_v_args_t args;
+               args.vector = vector;
+               args.count = count;
+               result = ioctl(pcm->fd[SND_PCM_CHANNEL_CAPTURE], SND_IOCTL_READV, &args);
+       }
+#endif
+       if (result < 0)
+               return -errno;
+       return result;
+}
+
 int snd_pcm_mmap(snd_pcm_t *pcm, int channel, snd_pcm_mmap_control_t **control, void **buffer)
 {
        snd_pcm_channel_info_t info;