mirror of https://github.com/VDR4Arch/vdr.git
129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
/*
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* audio.c: The basic audio interface
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: audio.c 2.2 2010/05/16 11:00:52 kls Exp $
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*/
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#include "audio.h"
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#include <stdlib.h>
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#include "dvbdevice.h"
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// --- cAudio ----------------------------------------------------------------
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cAudio::cAudio(void)
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{
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Audios.Add(this);
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}
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cAudio::~cAudio()
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{
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}
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// --- cAudios ---------------------------------------------------------------
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cAudios Audios;
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void cAudios::PlayAudio(const uchar *Data, int Length, uchar Id)
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{
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for (cAudio *audio = First(); audio; audio = Next(audio))
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audio->Play(Data, Length, Id);
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}
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void cAudios::PlayTsAudio(const uchar *Data, int Length)
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{
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for (cAudio *audio = First(); audio; audio = Next(audio))
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audio->PlayTs(Data, Length);
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}
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void cAudios::MuteAudio(bool On)
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{
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for (cAudio *audio = First(); audio; audio = Next(audio))
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audio->Mute(On);
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}
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void cAudios::ClearAudio(void)
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{
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for (cAudio *audio = First(); audio; audio = Next(audio))
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audio->Clear();
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}
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// --- cExternalAudio --------------------------------------------------------
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cExternalAudio::cExternalAudio(const char *Command)
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{
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command = strdup(Command);
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mute = false;
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cDvbDevice::SetTransferModeForDolbyDigital(2);
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}
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cExternalAudio::~cExternalAudio()
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{
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free(command);
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}
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void cExternalAudio::Play(const uchar *Data, int Length, uchar Id)
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{
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if (command && !mute) {
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if (pipe || pipe.Open(command, "w")) {
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if (0x80 <= Id && Id <= 0x87 || Id == 0xBD) { // AC3
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int written = Data[8] + 9; // skips the PES header
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if (Id != 0xBD)
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written += 4; // skips AC3 bytes
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Length -= written;
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while (Length > 0) {
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int w = fwrite(Data + written, 1, Length, pipe);
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if (w < 0) {
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LOG_ERROR;
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break;
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}
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Length -= w;
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written += w;
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}
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}
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}
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else {
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esyslog("ERROR: can't open pipe to audio command '%s'", command);
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free(command);
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command = NULL;
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}
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}
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}
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void cExternalAudio::PlayTs(const uchar *Data, int Length)
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{
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if (command && !mute) {
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if (pipe || pipe.Open(command, "w")) {
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int written = 0;
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while (Length > 0) {
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int w = fwrite(Data + written, 1, Length, pipe);
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if (w < 0) {
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LOG_ERROR;
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break;
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}
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Length -= w;
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written += w;
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}
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}
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else {
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esyslog("ERROR: can't open pipe to audio command '%s'", command);
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free(command);
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command = NULL;
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}
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}
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}
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void cExternalAudio::Mute(bool On)
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{
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mute = On;
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if (mute)
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Clear();
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}
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void cExternalAudio::Clear(void)
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{
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pipe.Close();
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}
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