decoder/mad: make enums strictly-typed
This commit is contained in:
Max Kellermann
parent
97e6ea57c4
commit
22a9e866bc
@ -49,17 +49,17 @@
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static constexpr unsigned long FRAMES_CUSHION = 2000;
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enum mp3_action {
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DECODE_SKIP = -3,
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DECODE_BREAK = -2,
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DECODE_CONT = -1,
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DECODE_OK = 0
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enum class MadDecoderAction {
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SKIP,
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BREAK,
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CONT,
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OK
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};
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enum muteframe {
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MUTEFRAME_NONE,
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MUTEFRAME_SKIP,
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MUTEFRAME_SEEK
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enum class MadDecoderMuteFrame {
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NONE,
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SKIP,
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SEEK
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};
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/* the number of samples of silence the decoder inserts at start */
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@ -129,7 +129,7 @@ struct MadDecoder {
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SignedSongTime total_time;
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SongTime elapsed_time;
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SongTime seek_time;
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enum muteframe mute_frame = MUTEFRAME_NONE;
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MadDecoderMuteFrame mute_frame = MadDecoderMuteFrame::NONE;
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long *frame_offsets = nullptr;
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mad_timer_t *times = nullptr;
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unsigned long highest_frame = 0;
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@ -153,8 +153,8 @@ struct MadDecoder {
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bool Seek(long offset);
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bool FillBuffer();
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void ParseId3(size_t tagsize, Tag *tag);
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enum mp3_action DecodeNextFrameHeader(Tag *tag);
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enum mp3_action DecodeNextFrame();
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MadDecoderAction DecodeNextFrameHeader(Tag *tag);
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MadDecoderAction DecodeNextFrame();
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gcc_pure
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offset_type ThisFrameOffset() const noexcept;
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@ -364,26 +364,26 @@ id3_tag_query(const void *p0, size_t length)
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}
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#endif /* !ENABLE_ID3TAG */
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static enum mp3_action
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static MadDecoderAction
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RecoverFrameError(struct mad_stream &stream)
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{
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if (MAD_RECOVERABLE(stream.error))
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return DECODE_SKIP;
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return MadDecoderAction::SKIP;
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else if (stream.error == MAD_ERROR_BUFLEN)
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return DECODE_CONT;
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return MadDecoderAction::CONT;
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FormatWarning(mad_domain,
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"unrecoverable frame level error: %s",
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mad_stream_errorstr(&stream));
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return DECODE_BREAK;
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return MadDecoderAction::BREAK;
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}
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enum mp3_action
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MadDecoderAction
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MadDecoder::DecodeNextFrameHeader(Tag *tag)
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{
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if ((stream.buffer == nullptr || stream.error == MAD_ERROR_BUFLEN) &&
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!FillBuffer())
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return DECODE_BREAK;
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return MadDecoderAction::BREAK;
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if (mad_header_decode(&frame.header, &stream)) {
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if (stream.error == MAD_ERROR_LOSTSYNC && stream.this_frame) {
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@ -393,7 +393,7 @@ MadDecoder::DecodeNextFrameHeader(Tag *tag)
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if (tagsize > 0) {
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ParseId3((size_t)tagsize, tag);
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return DECODE_CONT;
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return MadDecoderAction::CONT;
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}
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}
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@ -404,24 +404,24 @@ MadDecoder::DecodeNextFrameHeader(Tag *tag)
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if (layer == (mad_layer)0) {
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if (new_layer != MAD_LAYER_II && new_layer != MAD_LAYER_III) {
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/* Only layer 2 and 3 have been tested to work */
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return DECODE_SKIP;
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return MadDecoderAction::SKIP;
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}
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layer = new_layer;
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} else if (new_layer != layer) {
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/* Don't decode frames with a different layer than the first */
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return DECODE_SKIP;
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return MadDecoderAction::SKIP;
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}
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return DECODE_OK;
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return MadDecoderAction::OK;
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}
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enum mp3_action
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MadDecoderAction
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MadDecoder::DecodeNextFrame()
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{
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if ((stream.buffer == nullptr || stream.error == MAD_ERROR_BUFLEN) &&
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!FillBuffer())
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return DECODE_BREAK;
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return MadDecoderAction::BREAK;
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if (mad_frame_decode(&frame, &stream)) {
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if (stream.error == MAD_ERROR_LOSTSYNC) {
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@ -430,14 +430,14 @@ MadDecoder::DecodeNextFrame()
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stream.this_frame);
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if (tagsize > 0) {
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mad_stream_skip(&stream, tagsize);
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return DECODE_CONT;
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return MadDecoderAction::CONT;
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}
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}
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return RecoverFrameError(stream);
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}
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return DECODE_OK;
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return MadDecoderAction::OK;
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}
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/* xing stuff stolen from alsaplayer, and heavily modified by jat */
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@ -699,20 +699,20 @@ MadDecoder::DecodeFirstFrame(Tag *tag)
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struct xing xing;
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while (true) {
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enum mp3_action ret;
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MadDecoderAction ret;
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do {
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ret = DecodeNextFrameHeader(tag);
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} while (ret == DECODE_CONT);
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if (ret == DECODE_BREAK)
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} while (ret == MadDecoderAction::CONT);
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if (ret == MadDecoderAction::BREAK)
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return false;
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if (ret == DECODE_SKIP) continue;
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if (ret == MadDecoderAction::SKIP) continue;
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do {
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ret = DecodeNextFrame();
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} while (ret == DECODE_CONT);
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if (ret == DECODE_BREAK)
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} while (ret == MadDecoderAction::CONT);
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if (ret == MadDecoderAction::BREAK)
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return false;
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if (ret == DECODE_OK) break;
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if (ret == MadDecoderAction::OK) break;
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}
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struct mad_bitptr ptr = stream.anc_ptr;
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@ -724,7 +724,7 @@ MadDecoder::DecodeFirstFrame(Tag *tag)
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* if an xing tag exists, use that!
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*/
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if (parse_xing(&xing, &ptr, &bitlen)) {
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mute_frame = MUTEFRAME_SKIP;
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mute_frame = MadDecoderMuteFrame::SKIP;
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if ((xing.flags & XING_FRAMES) && xing.frames) {
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mad_timer_t duration = frame.header.duration;
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@ -906,14 +906,14 @@ MadDecoder::Read()
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switch (mute_frame) {
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DecoderCommand cmd;
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case MUTEFRAME_SKIP:
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mute_frame = MUTEFRAME_NONE;
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case MadDecoderMuteFrame::SKIP:
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mute_frame = MadDecoderMuteFrame::NONE;
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break;
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case MUTEFRAME_SEEK:
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case MadDecoderMuteFrame::SEEK:
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if (elapsed_time >= seek_time)
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mute_frame = MUTEFRAME_NONE;
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mute_frame = MadDecoderMuteFrame::NONE;
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break;
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case MUTEFRAME_NONE:
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case MadDecoderMuteFrame::NONE:
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cmd = SyncAndSend();
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if (cmd == DecoderCommand::SEEK) {
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assert(input_stream.IsSeekable());
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@ -928,7 +928,7 @@ MadDecoder::Read()
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client->SeekError();
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} else {
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seek_time = t;
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mute_frame = MUTEFRAME_SEEK;
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mute_frame = MadDecoderMuteFrame::SEEK;
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client->CommandFinished();
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}
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} else if (cmd != DecoderCommand::NONE)
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@ -936,7 +936,7 @@ MadDecoder::Read()
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}
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while (true) {
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enum mp3_action ret;
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MadDecoderAction ret;
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do {
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Tag tag;
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@ -945,21 +945,21 @@ MadDecoder::Read()
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if (!tag.IsEmpty())
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client->SubmitTag(input_stream,
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std::move(tag));
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} while (ret == DECODE_CONT);
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if (ret == DECODE_BREAK)
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} while (ret == MadDecoderAction::CONT);
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if (ret == MadDecoderAction::BREAK)
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return false;
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const bool skip = ret == DECODE_SKIP;
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const bool skip = ret == MadDecoderAction::SKIP;
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if (mute_frame == MUTEFRAME_NONE) {
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if (mute_frame == MadDecoderMuteFrame::NONE) {
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do {
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ret = DecodeNextFrame();
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} while (ret == DECODE_CONT);
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if (ret == DECODE_BREAK)
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} while (ret == MadDecoderAction::CONT);
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if (ret == MadDecoderAction::BREAK)
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return false;
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}
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if (!skip && ret == DECODE_OK)
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if (!skip && ret == MadDecoderAction::OK)
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return true;
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}
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}
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