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* oggvorbis: don't detect OGG header if stream is not seekableMax Kellermann2008-08-262-0/+10
| | | | | | | | | If the input stream is not seekable, the try_decode() function consumes valuable data, which is not available to the decode() function anymore. This means that the decode() function does not parse the header correctly. Better skip the detection if we cannot seek. Or implement better buffering, something like unread() or buffered rewind().
* added AacBuffer.decoderMax Kellermann2008-08-261-4/+7
| | | | | | We need the decoder object at several places in the AAC plugin. Add it to mp3DecodeData, so we don't have to pass it around in every function.
* mp3: added mp3DecodeData.decoderMax Kellermann2008-08-261-9/+13
| | | | | | We need the decoder object at several places in the mp3 plugin. Add it to mp3DecodeData, so we don't have to pass it around in every function.
* mp3: audio_linear_dither() returns mpd_sint16Max Kellermann2008-08-261-11/+9
| | | | | | The return value of audio_linear_dither() is always casted to mpd_sint16. Returning long does not make sense, and consumed 8 bytes on a 64 bit platform.
* mp3: changed outputBuffer's type to mpd_sint16[]Max Kellermann2008-08-261-3/+3
| | | | | The output buffer always contains mpd_sint16; declaring it with that type saves several casts.
* mp3: moved num_samples calculation out of the loopMax Kellermann2008-08-261-5/+7
| | | | | The previous patch removed all loop specific dependencies from the num_samples formula; we can now calculate it before entering the loop.
* mp3: eliminated outputPtrMax Kellermann2008-08-261-14/+3
| | | | | | The output buffer is always flushed after being appended to, which allows us to assume it is always empty. Always start writing at outputBuffer, don't remember outputPtr.
* mp3: don't do a second flush in mp3_decode()Max Kellermann2008-08-261-17/+1
| | | | | | The previous patch made mp3Read() flush the output buffer in every iteration, which means we can eliminate the flush check after invoking mp3Read().
* mp3: always flush directly after decoding/ditheringMax Kellermann2008-08-261-15/+13
| | | | | Since we try to fill the buffer in every iteration, we assume that we should flush the output buffer at the end of each iteration.
* mp3: dither a whole block at a timeMax Kellermann2008-08-261-3/+9
| | | | | | Fill the whole output buffer at a time by using dither_buffer()'s ability to decode blocks. Calculate how many samples fit into the output buffer before each invocation.
* mp3: moved dropSamplesAtEnd check out of the loopMax Kellermann2008-08-261-21/+18
| | | | | | | Simplifying loops for performance: why check dropSamplesAtEnd in every iteration, when we could modify the loop boundary? The (writable) variable samplesLeft can be eliminated; add a write-once variable pcm_length instead, which is used for the loop condition.
* mp3: make samplesPerFrame more localMax Kellermann2008-08-261-2/+1
| | | | | | The variable samplesPerFrame is used only in one single closure. Make it local to this closure. The compiler will probably convert it to a register anyway.
* mp3: unsigned integersMax Kellermann2008-08-261-11/+11
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* mp3: removed double cmd==STOP checkMax Kellermann2008-08-261-3/+0
| | | | | cmd has already been checked before, it cannot have changed meanwhile because it is a local variable.
* mp3: moved code to dither_buffer()Max Kellermann2008-08-261-14/+30
| | | | | | | | Preparing for simplifying and thus speeding up the dithering code: moved dithering to a separate function which contains a trivial loop. With this patch, only one sample is dithered at a time, but the following patches will allow us to dither a whole block at a time, without complicated buffer length checks.
* mp3: don't check dropSamplesAtStart in the loopMax Kellermann2008-08-261-7/+14
| | | | | Performance improvement by moving stuff out of a loop: skip part of the first frame before entering the loop.
* aac: support decoding AAC streamsMax Kellermann2008-08-261-2/+137
| | | | | | Copy some code from aac_decode() to aac_stream_decode() and apply necessary changes to allow streaming audio data. Both functions might be merged later.
* aac: splitted aac_parse_header() from initAacBuffer()Max Kellermann2008-08-261-11/+16
| | | | | | | initAacBuffer() should really only initialize the buffer; currently, it also reads data from the input stream and parses the header. All of the AAC buffer code should probably be moved to a separate library anyway.
* aac: check buffer lengthsMax Kellermann2008-08-261-2/+3
| | | | | The AAC plugin sometimes does not check the length of available data when checking for magic prefixes. Add length checks.
* aac: use fillAacBuffer() instead of manual readingMax Kellermann2008-08-261-16/+4
| | | | Eliminate some duplicated code by using fillAacBuffer().
* find AAC framesMax Kellermann2008-08-261-1/+35
| | | | | Find AAC frames in the input and skip invalid data. This prepares AAC streaming.
* aac: moved code to adts_check_frame()Max Kellermann2008-08-261-11/+20
| | | | | adts_check_frame() checks whether the buffer head is an AAC frame, and returns the frame length.
* aac: moved code to aac_buffer_shift()Max Kellermann2008-08-261-7/+14
| | | | | | Shifting from the buffer queue is a common operation, and should be provided as a separate function. Move code to aac_buffer_shift() and add a bunch of assertions.
* aac: use inputStreamAtEOF()Max Kellermann2008-08-261-5/+4
| | | | | | | | | When checking for EOF, we should not check whether the read request has been fully satisified. The InputStream API does not guarantee that readFromInputStream() always fills the whole buffer, if EOF is not reached. Since there is the function inputStreamAtEOF() dedicated for this purpose, we should use it for EOF checking after readFromInputStream()==0.
* aac: don't depend on consumed data in fillAacBuffer()Max Kellermann2008-08-261-6/+10
| | | | | | Fill the AacBuffer even when nothing has been consumed yet. The function should not check for consumed data, but for free space at the end of the buffer.
* aac: simplified fillAacBuffer()Max Kellermann2008-08-261-33/+25
| | | | | Return instead of putting all the code into a if-closure. That saves one level of indentation.
* aac: make adtsParse() voidMax Kellermann2008-08-261-3/+1
| | | | | adtsParse() always returns 1, and its caller does not use the return value.
* aac: use size_tMax Kellermann2008-08-261-6/+6
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* aac: removed unused initAacBuffer() parametersMax Kellermann2008-08-261-9/+3
| | | | | Since we eliminated the parameters retFileread and retTagsize in all callers, we can now safely remove it from the function prototype.
* eliminate unused variables in the AAC decoderMax Kellermann2008-08-261-10/+2
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* added decoder_plugin_register()Max Kellermann2008-08-261-2/+1
| | | | | | | With the functions decoder_plugin_register() and decoder_plugin_unregister(), decoder plugins can register a "secondary" plugin, like the flac input plugin does this for "oggflac".
* renamed functions in decoder_list.hMax Kellermann2008-08-261-1/+1
| | | | InputPlugin to decoder_plugin, and no camelCase.
* no camel case in struct decoder_pluginMax Kellermann2008-08-261-5/+5
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* renamed inputPlugin.* to decoder_list.*Max Kellermann2008-08-261-1/+1
| | | | | Since inputPlugin.c manages the list of registered decoders, we should rename the source file.
* renamed InputPlugin to struct decoder_pluginMax Kellermann2008-08-2610-21/+21
| | | | | | "decoder plugin" is a better name than "input plugin", since the plugin does not actually do the input - InputStream does. Also don't use typedef, so we can forward-declare it if required.
* eliminate OUTPUT_BUFFER_DC_STOP, OUTPUT_BUFFER_DC_SEEKMax Kellermann2008-08-262-4/+5
| | | | | (Ab)use the decoder_command enumeration, which has nearly the same values and the same meaning.
* added decoder_get_url()Max Kellermann2008-08-261-1/+1
| | | | | | The wavpack decoder plugin implements a hack, and it needs the song URL for that. This API (and the hack) should be revised later, but add that function for now.
* don't set dc->seekable in wavpack pluginMax Kellermann2008-08-261-2/+0
| | | | dc->seekable is already set by decodeStart().
* use a local "initialized" flag instead of dc->stateMax Kellermann2008-08-263-5/+11
| | | | | | Since we want to hide mpd internals from the decoder plugins, the plugins should not check dc->state whether they have already called decoder_initialized(). Use a local variable to track that.
* added decoder_seek_where() and decoder_seek_error()Max Kellermann2008-08-2610-40/+40
| | | | | Provide access to seeking for the decoder plugins; they have to know where to seek, and they need a way to tell us that seeking has failed.
* added decoder_command_finished() to decoder_api.hMax Kellermann2008-08-2610-15/+15
| | | | | | | Some decoder commands are implemented in the decoder plugins, thus they need to have an API call to signal that their current command has been finished. Let them use the new decoder_command_finished() instead of the internal dc_command_finished().
* added decoder_get_command()Max Kellermann2008-08-2611-59/+67
| | | | | | Another big patch which hides internal mpd APIs from decoder plugins: decoder plugins regularly poll dc->command; expose it with a decoder_api.h function.
* moved InputPlugin to decoder_api.hMax Kellermann2008-08-264-4/+3
| | | | | | InputPlugin is the API which is implemented by a decoder plugin. This belongs to the public API/ABI, so move it to decoder_api.h. It will later be renamed to something like "decoder_plugin".
* remove one indent level from audiofile pluginMax Kellermann2008-08-261-30/+25
| | | | | Anonymous code blocks just to declare variables look ugly. Move the variable declarations up and disband the code block.
* use break instead of local variable "eof"Max Kellermann2008-08-261-16/+12
| | | | | Similar to previous patch: eliminate one variable by using "break". This also simplifies the code since we can remove one level of indent.
* removed local variable "eof" because it is unusedMax Kellermann2008-08-262-19/+9
| | | | | "break" is so much easier than "eof=1; continue;", when "!eof" is the loop condition.
* simplify several dc->command checksMax Kellermann2008-08-261-7/+3
| | | | | | Since we have merged dc->stop, dc->seek into one variable, we don't have to check both conditions at a time; we can replace "!stop && !seek" with "none".
* added parameter total_time to decoder_initialized()Max Kellermann2008-08-2612-27/+25
| | | | | Similar to the previous patch: pass total_time instead of manipulating dc->totalTime directly.
* added audio_format parameter to decoder_initialized()Max Kellermann2008-08-2612-81/+78
| | | | | | dc->audioFormat is set once by the decoder plugins before invoking decoder_initialized(); hide dc->audioFormat and let the decoder pass an AudioFormat pointer to decoder_initialized().
* added decoder_clear() and decoder_flush()Max Kellermann2008-08-2610-22/+21
| | | | | | We are now beginning to remove direct structure accesses from the decoder plugins. decoder_clear() and decoder_flush() mask two very common buffer functions.
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