mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 07:33:46 +01:00
e7db4ccf1a
patch replaces '()' for the correct '(void)' in function declarations/prototypes which have no parameters. The '()' syntax tell thats there is a variable list of arguments, so that the compiler cannot check this. The extra CFLAG '-Wstrict-declarations' shows those cases. Comments about a similar patch applied to ffmpeg: That in C++ these mean the same, but in ANSI C the semantics are different; function() is an (obsolete) K&R C style forward declaration, it basically means that the function can have any number and any types of parameters, effectively completely preventing the compiler from doing any sort of type checking. -- Erik Slagter Defining functions with unspecified arguments is allowed but bad. With arguments unspecified the compiler can't report an error/warning if the function is called with incorrect arguments. -- Måns Rullgård git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17567 b3059339-0415-0410-9bf9-f77b7e298cf2
138 lines
3.0 KiB
C
138 lines
3.0 KiB
C
/*
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* ao_arts - aRts audio output driver for MPlayer
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*
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* Michele Balistreri <brain87@gmx.net>
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*
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* This driver is distribuited under terms of GPL
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*
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*/
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#include <artsc.h>
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#include <stdio.h>
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#include "config.h"
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#include "audio_out.h"
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#include "audio_out_internal.h"
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#include "libaf/af_format.h"
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#include "mp_msg.h"
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#include "help_mp.h"
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#define OBTAIN_BITRATE(a) (((a != AF_FORMAT_U8) && (a != AF_FORMAT_S8)) ? 16 : 8)
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/* Feel free to experiment with the following values: */
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#define ARTS_PACKETS 10 /* Number of audio packets */
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#define ARTS_PACKET_SIZE_LOG2 11 /* Log2 of audio packet size */
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static arts_stream_t stream;
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static ao_info_t info =
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{
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"aRts audio output",
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"arts",
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"Michele Balistreri <brain87@gmx.net>",
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""
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};
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LIBAO_EXTERN(arts)
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static int control(int cmd, void *arg)
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{
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return(CONTROL_UNKNOWN);
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}
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static int init(int rate_hz, int channels, int format, int flags)
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{
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int err;
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int frag_spec;
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if( (err=arts_init()) ) {
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mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ARTS_CantInit, arts_error_text(err));
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return 0;
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}
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mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ARTS_ServerConnect);
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/*
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* arts supports 8bit unsigned and 16bit signed sample formats
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* (16bit apparently in little endian format, even in the case
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* when artsd runs on a big endian cpu).
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*
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* Unsupported formats are translated to one of these two formats
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* using mplayer's audio filters.
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*/
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switch (format) {
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case AF_FORMAT_U8:
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case AF_FORMAT_S8:
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format = AF_FORMAT_U8;
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break;
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default:
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format = AF_FORMAT_S16_LE; /* artsd always expects little endian?*/
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break;
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}
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ao_data.format = format;
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ao_data.channels = channels;
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ao_data.samplerate = rate_hz;
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ao_data.bps = (rate_hz*channels);
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if(format != AF_FORMAT_U8 && format != AF_FORMAT_S8)
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ao_data.bps*=2;
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stream=arts_play_stream(rate_hz, OBTAIN_BITRATE(format), channels, "MPlayer");
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if(stream == NULL) {
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mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ARTS_CantOpenStream);
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arts_free();
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return 0;
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}
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/* Set the stream to blocking: it will not block anyway, but it seems */
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/* to be working better */
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arts_stream_set(stream, ARTS_P_BLOCKING, 1);
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frag_spec = ARTS_PACKET_SIZE_LOG2 | ARTS_PACKETS << 16;
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arts_stream_set(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
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ao_data.buffersize = arts_stream_get(stream, ARTS_P_BUFFER_SIZE);
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mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ARTS_StreamOpen);
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mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ARTS_BufferSize,
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ao_data.buffersize);
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mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ARTS_BufferSize,
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arts_stream_get(stream, ARTS_P_PACKET_SIZE));
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return 1;
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}
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static void uninit(int immed)
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{
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arts_close_stream(stream);
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arts_free();
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}
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static int play(void* data,int len,int flags)
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{
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return arts_write(stream, data, len);
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}
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static void audio_pause(void)
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{
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}
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static void audio_resume(void)
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{
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}
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static void reset(void)
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{
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}
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static int get_space(void)
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{
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return arts_stream_get(stream, ARTS_P_BUFFER_SPACE);
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}
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static float get_delay(void)
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{
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return ((float) (ao_data.buffersize - arts_stream_get(stream,
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ARTS_P_BUFFER_SPACE))) / ((float) ao_data.bps);
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}
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