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file plugin: fix various bugs

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Initialize wbuf_used_bytes, adjust appl_ptr in the rewind and forward
callbacks, and adjust the offset when a data block straddles the
boundary of the wbuf buffer.
This commit is contained in:
Clemens Ladisch 2005-10-17 16:10:16 +00:00
parent b5f50b06d2
commit 37dee92d73
1 changed files with 4 additions and 0 deletions
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4
src/pcm/pcm_file.c
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@ -102,6 +102,7 @@ static void snd_pcm_file_add_frames(snd_pcm_t *pcm,
areas, offset,
pcm->channels, n, pcm->format);
frames -= n;
offset += n;
file->appl_ptr += n;
if (file->appl_ptr == file->wbuf_size)
file->appl_ptr = 0;
@ -168,6 +169,7 @@ static snd_pcm_sframes_t snd_pcm_file_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t f
frames = snd_pcm_bytes_to_frames(pcm, file->wbuf_used_bytes);
err = snd_pcm_rewind(file->gen.slave, frames);
if (err > 0) {
file->appl_ptr = (file->appl_ptr - err + file->wbuf_size) % file->wbuf_size;
n = snd_pcm_frames_to_bytes(pcm, err);
file->wbuf_used_bytes -= n;
}
@ -185,6 +187,7 @@ static snd_pcm_sframes_t snd_pcm_file_forward(snd_pcm_t *pcm, snd_pcm_uframes_t
frames = snd_pcm_bytes_to_frames(pcm, file->wbuf_size_bytes - file->wbuf_used_bytes);
err = INTERNAL(snd_pcm_forward)(file->gen.slave, frames);
if (err > 0) {
file->appl_ptr = (file->appl_ptr + err) % file->wbuf_size;
snd_pcm_uframes_t n = snd_pcm_frames_to_bytes(pcm, err);
file->wbuf_used_bytes += n;
}
@ -281,6 +284,7 @@ static int snd_pcm_file_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
file->buffer_bytes = snd_pcm_frames_to_bytes(slave, slave->buffer_size);
file->wbuf_size = slave->buffer_size * 2;
file->wbuf_size_bytes = snd_pcm_frames_to_bytes(slave, file->wbuf_size);
file->wbuf_used_bytes = 0;
assert(!file->wbuf);
file->wbuf = malloc(file->wbuf_size_bytes);
if (file->wbuf == NULL) {