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audio: adjust format change code

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Execute the format change based on whether we logically detected EOF
(after filters), instead of when the decode buffer was drained. It's
slightly cleaner. (The requirement of len>0 existed before.)
This commit is contained in:
wm4 2014-07-24 15:26:43 +02:00
parent 986099d323
commit fc28e4af4d
1 changed files with 9 additions and 8 deletions
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17
audio/decode/dec_audio.c
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@ -242,17 +242,18 @@ int audio_init_filters(struct dec_audio *d_audio, int in_samplerate,
static int filter_n_bytes(struct dec_audio *da, struct mp_audio_buffer *outbuf,
int len)
{
bool format_change = false;
int error = 0;
assert(len > 0); // would break EOF logic below
while (mp_audio_buffer_samples(da->decode_buffer) < len) {
// Check for a format change
struct mp_audio config;
mp_audio_buffer_get_format(da->decode_buffer, &config);
if (!mp_audio_config_equals(&da->decoded, &config)) {
// If there are still samples left in the buffer, let them drain
// first, and don't signal a format change to the caller yet.
if (mp_audio_buffer_samples(da->decode_buffer) == 0)
error = AD_NEW_FMT;
format_change = !mp_audio_config_equals(&da->decoded, &config);
if (format_change) {
error = AD_EOF; // drain remaining data left in the current buffer
break;
}
if (da->decoded.samples > 0) {
@ -286,9 +287,9 @@ static int filter_n_bytes(struct dec_audio *da, struct mp_audio_buffer *outbuf,
// remove processed data from decoder buffer:
mp_audio_buffer_skip(da->decode_buffer, len);
// Assume the filter chain is drained from old data at this point.
// (If not, the remaining old data is discarded.)
if (error == AD_NEW_FMT) {
// if format was changed, and all data was drained, execute the format change
if (format_change && eof) {
error = AD_NEW_FMT;
if (!reinit_audio_buffer(da))
error = AD_ERR; // switch to invalid format
}