Merge branch 'v0.19.x'

NEWS

@@ -57,7 +57,11 @@ ver 0.20 (not yet released)
 ver 0.19.20 (not yet released)
 * decoder
   - ffmpeg: ignore empty packets
+  - pcm: fix corruption bug with partial frames (after short read)
   - sidplay: fix playback speed with libsidplayfp
+* output
+  - winmm: fix 8 bit playback
+* fix gcc 7.0 -Wimplicit-fallthrough
 
 ver 0.19.19 (2016/08/23)
 * decoder

doc/protocol.xml

@@ -66,8 +66,8 @@
         <function>strcpy</function> just fine with UTF-8 encoded
         strings. For example: <returnvalue>OK</returnvalue> encoded in
         UTF-8 is simply <returnvalue>OK</returnvalue>.  For more
-        information on UTF=8:
-        http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8)
+        information on UTF-8:
+        <ulink url="http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8"/>)
       </para>
     </section>
 

src/decoder/plugins/PcmDecoderPlugin.cxx

@@ -25,16 +25,34 @@
 #include "system/ByteOrder.hxx"
 #include "util/Domain.hxx"
 #include "util/ByteReverse.hxx"
+#include "util/StaticFifoBuffer.hxx"
 #include "util/NumberParser.hxx"
 #include "util/MimeType.hxx"
 #include "Log.hxx"
 
 #include <stdexcept>
 
+#include <assert.h>
 #include <string.h>
 
 static constexpr Domain pcm_decoder_domain("pcm_decoder");
 
+template<typename B>
+static bool
+FillBuffer(Decoder &decoder, InputStream &is, B &buffer)
+{
+	buffer.Shift();
+	auto w = buffer.Write();
+	assert(!w.IsEmpty());
+
+	size_t nbytes = decoder_read(decoder, is, w.data, w.size);
+	if (nbytes == 0 && is.LockIsEOF())
+		return false;
+
+	buffer.Append(nbytes);
+	return true;
+}
+
 static void
 pcm_stream_decode(Decoder &decoder, InputStream &is)
 {
@@ -128,25 +146,27 @@ pcm_stream_decode(Decoder &decoder, InputStream &is)
 	decoder_initialized(decoder, audio_format,
 			    is.IsSeekable(), total_time);
 
+	StaticFifoBuffer<uint8_t, 4096> buffer;
+
 	DecoderCommand cmd;
 	do {
-		char buffer[4096];
-
-		size_t nbytes = decoder_read(decoder, is,
-					     buffer, sizeof(buffer));
-
-		if (nbytes == 0 && is.LockIsEOF())
+		if (!FillBuffer(decoder, is, buffer))
 			break;
 
+		auto r = buffer.Read();
+		/* round down to the nearest frame size, because we
+		   must not pass partial frames to decoder_data() */
+		r.size -= r.size % frame_size;
+		buffer.Consume(r.size);
+
 		if (reverse_endian)
 			/* make sure we deliver samples in host byte order */
-			reverse_bytes_16((uint16_t *)buffer,
-					 (uint16_t *)buffer,
-					 (uint16_t *)(buffer + nbytes));
+			reverse_bytes_16((uint16_t *)r.data,
+					 (uint16_t *)r.data,
+					 (uint16_t *)(r.data + r.size));
 
-		cmd = nbytes > 0
-			? decoder_data(decoder, is,
-				       buffer, nbytes, 0)
+		cmd = !r.IsEmpty()
+			? decoder_data(decoder, is, r.data, r.size, 0)
 			: decoder_get_command(decoder);
 		if (cmd == DecoderCommand::SEEK) {
 			uint64_t frame = decoder_seek_where_frame(decoder);
@@ -154,6 +174,7 @@ pcm_stream_decode(Decoder &decoder, InputStream &is)
 
 			try {
 				is.LockSeek(offset);
+				buffer.Clear();
 				decoder_command_finished(decoder);
 			} catch (const std::runtime_error &e) {
 				LogError(e);

src/input/plugins/AlsaInputPlugin.cxx

@@ -223,6 +223,10 @@ AlsaInputStream::Recover(int err)
 	case -EPIPE:
 		LogDebug(alsa_input_domain, "Buffer Overrun");
 		// drop through
+#if GCC_CHECK_VERSION(7,0)
+		[[fallthrough]];
+#endif
+
 	case -ESTRPIPE:
 	case -EINTR:
 		err = snd_pcm_recover(capture_handle, err, 1);

src/output/plugins/AlsaOutputPlugin.cxx

@@ -774,6 +774,9 @@ AlsaOutput::Recover(int err)
 		if (err == -EAGAIN)
 			return 0;
 		/* fall-through to snd_pcm_prepare: */
+#if GCC_CHECK_VERSION(7,0)
+		[[fallthrough]];
+#endif
 	case SND_PCM_STATE_SETUP:
 	case SND_PCM_STATE_XRUN:
 		period_position = 0;

src/output/plugins/WinmmOutputPlugin.cxx

@@ -161,10 +161,10 @@ WinmmOutput::Open(AudioFormat &audio_format)
 		throw std::runtime_error("CreateEvent() failed");
 
 	switch (audio_format.format) {
-	case SampleFormat::S8:
 	case SampleFormat::S16:
 		break;
 
+	case SampleFormat::S8:
 	case SampleFormat::S24_P32:
 	case SampleFormat::S32:
 	case SampleFormat::FLOAT: