gecko/widget/qt/nsSound.cpp
2012-08-22 12:12:15 -04:00

381 lines
9.9 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <QApplication>
#include <string.h>
#include <unistd.h>
#include "nscore.h"
#include "plstr.h"
#include "prlink.h"
#include "nsSound.h"
#include "nsString.h"
#include "nsIURL.h"
#include "nsIFileURL.h"
#include "nsNetUtil.h"
#include "nsCOMPtr.h"
#include "nsNativeCharsetUtils.h"
#include "nsAutoPtr.h"
/* used with esd_open_sound */
static int esdref = -1;
static PRLibrary *elib = nullptr;
// the following from esd.h
#define ESD_BITS8 (0x0000)
#define ESD_BITS16 (0x0001)
#define ESD_MONO (0x0010)
#define ESD_STEREO (0x0020)
#define ESD_STREAM (0x0000)
#define ESD_PLAY (0x1000)
#define WAV_MIN_LENGTH 44
typedef int (*EsdOpenSoundType)(const char *host);
typedef int (*EsdCloseType)(int);
/* used to play the sounds from the find symbol call */
typedef int (*EsdPlayStreamType) (int, int, const char *, const char *);
typedef int (*EsdAudioOpenType) (void);
typedef int (*EsdAudioWriteType) (const void *, int);
typedef void (*EsdAudioCloseType) (void);
NS_IMPL_ISUPPORTS2(nsSound, nsISound, nsIStreamLoaderObserver)
nsSound::nsSound()
: mInited( false )
{
}
nsSound::~nsSound()
{
/* see above comment */
if (esdref != -1) {
EsdCloseType EsdClose = (EsdCloseType) PR_FindFunctionSymbol(elib, "esd_close");
if (EsdClose)
(*EsdClose)(esdref);
esdref = -1;
}
}
/**
* unload esd library
*/
void
nsSound::Shutdown()
{
if (elib) {
PR_UnloadLibrary(elib);
elib = nullptr;
}
}
NS_IMETHODIMP
nsSound::Init()
{
/* we don't need to do esd_open_sound if we are only going to play files
but we will if we want to do things like streams, etc
*/
if (mInited)
return NS_OK;
if (elib)
return NS_OK;
EsdOpenSoundType EsdOpenSound;
elib = PR_LoadLibrary("libesd.so.0");
if (!elib) return NS_ERROR_NOT_AVAILABLE;
EsdOpenSound = (EsdOpenSoundType) PR_FindFunctionSymbol(elib, "esd_open_sound");
if (!EsdOpenSound)
return NS_ERROR_FAILURE;
esdref = (*EsdOpenSound)("localhost");
if (!esdref)
return NS_ERROR_FAILURE;
mInited = true;
return NS_OK;
}
NS_METHOD nsSound::Beep()
{
QApplication::beep();
return NS_OK;
}
/**
* This can't be implemented directly with QT.
* (We can use QSound to play local files but that was not enough.
* Also support of media formats is limited)
*
* Current implementation is copied from GTK side and implementation uses ESD interface.
*
* If we have Qtopia then we can drop ESD implementation and use Qtopia "Multimedia API"
*/
NS_IMETHODIMP nsSound::OnStreamComplete(nsIStreamLoader *aLoader,
nsISupports *context,
nsresult aStatus,
uint32_t dataLen,
const uint8_t *data)
{
#define GET_WORD(s, i) (s[i+1] << 8) | s[i]
#define GET_DWORD(s, i) (s[i+3] << 24) | (s[i+2] << 16) | (s[i+1] << 8) | s[i]
// print a load error on bad status, and return
if (NS_FAILED(aStatus)) {
#ifdef DEBUG
if (aLoader) {
nsCOMPtr<nsIRequest> request;
aLoader->GetRequest(getter_AddRefs(request));
if (request) {
nsCOMPtr<nsIURI> uri;
nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
if (channel) {
channel->GetURI(getter_AddRefs(uri));
if (uri) {
nsCAutoString uriSpec;
uri->GetSpec(uriSpec);
printf("Failed to load %s\n", uriSpec.get());
}
}
}
}
#endif
return aStatus;
}
int fd, mask = 0;
uint32_t samples_per_sec = 0, avg_bytes_per_sec = 0, chunk_len = 0;
uint16_t format, channels = 1, bits_per_sample = 0;
const uint8_t *audio = nullptr;
size_t audio_len = 0;
if (dataLen < 4) {
NS_WARNING("Sound stream too short to determine its type");
return NS_ERROR_FAILURE;
}
if (memcmp(data, "RIFF", 4)) {
#ifdef DEBUG
printf("We only support WAV files currently.\n");
#endif
return NS_ERROR_FAILURE;
}
if (dataLen <= WAV_MIN_LENGTH) {
NS_WARNING("WAV files should be longer than 44 bytes.");
return NS_ERROR_FAILURE;
}
uint32_t i = 12;
while (i + 7 < dataLen) {
if (!memcmp(data + i, "fmt ", 4) && !chunk_len) {
i += 4;
/* length of the rest of this subblock (should be 16 for PCM data */
chunk_len = GET_DWORD(data, i);
i += 4;
if (chunk_len < 16 || i + chunk_len >= dataLen) {
NS_WARNING("Invalid WAV file: bad fmt chunk.");
return NS_ERROR_FAILURE;
}
format = GET_WORD(data, i);
i += 2;
channels = GET_WORD(data, i);
i += 2;
samples_per_sec = GET_DWORD(data, i);
i += 4;
avg_bytes_per_sec = GET_DWORD(data, i);
i += 4;
// block align
i += 2;
bits_per_sample = GET_WORD(data, i);
i += 2;
/* we don't support WAVs with odd compression codes */
if (chunk_len != 16)
NS_WARNING("Extra format bits found in WAV. Ignoring");
i += chunk_len - 16;
} else if (!memcmp(data + i, "data", 4)) {
i += 4;
if (!chunk_len) {
NS_WARNING("Invalid WAV file: no fmt chunk found");
return NS_ERROR_FAILURE;
}
audio_len = GET_DWORD(data, i);
i += 4;
/* try to play truncated WAVs */
if (i + audio_len > dataLen)
audio_len = dataLen - i;
audio = data + i;
break;
} else {
i += 4;
i += GET_DWORD(data, i);
i += 4;
}
}
if (!audio) {
NS_WARNING("Invalid WAV file: no data chunk found");
return NS_ERROR_FAILURE;
}
/* No audio data? well, at least the WAV was valid. */
if (!audio_len)
return NS_OK;
#if 0
printf("f: %d | c: %d | sps: %li | abps: %li | ba: %d | bps: %d | rate: %li\n",
format, channels, samples_per_sec, avg_bytes_per_sec, block_align, bits_per_sample, rate);
#endif
/* open up connection to esd */
EsdPlayStreamType EsdPlayStream =
(EsdPlayStreamType) PR_FindFunctionSymbol(elib,
"esd_play_stream");
if (!EsdPlayStream)
return NS_ERROR_FAILURE;
mask = ESD_PLAY | ESD_STREAM;
if (bits_per_sample == 8)
mask |= ESD_BITS8;
else
mask |= ESD_BITS16;
if (channels == 1)
mask |= ESD_MONO;
else
mask |= ESD_STEREO;
nsAutoArrayPtr<uint8_t> buf;
// ESD only handle little-endian data.
// Swap the byte order if we're on a big-endian architecture.
#ifdef IS_BIG_ENDIAN
if (bits_per_sample != 8) {
buf = new uint8_t[audio_len];
if (!buf)
return NS_ERROR_OUT_OF_MEMORY;
for (uint32_t j = 0; j + 2 < audio_len; j += 2) {
buf[j] = audio[j + 1];
buf[j + 1] = audio[j];
}
audio = buf;
}
#endif
fd = (*EsdPlayStream)(mask, samples_per_sec, NULL, "mozillaSound");
if (fd < 0) {
int *esd_audio_format = (int *) PR_FindSymbol(elib, "esd_audio_format");
int *esd_audio_rate = (int *) PR_FindSymbol(elib, "esd_audio_rate");
EsdAudioOpenType EsdAudioOpen = (EsdAudioOpenType) PR_FindFunctionSymbol(elib, "esd_audio_open");
EsdAudioWriteType EsdAudioWrite = (EsdAudioWriteType) PR_FindFunctionSymbol(elib, "esd_audio_write");
EsdAudioCloseType EsdAudioClose = (EsdAudioCloseType) PR_FindFunctionSymbol(elib, "esd_audio_close");
if (!esd_audio_format || !esd_audio_rate ||
!EsdAudioOpen || !EsdAudioWrite || !EsdAudioClose)
return NS_ERROR_FAILURE;
*esd_audio_format = mask;
*esd_audio_rate = samples_per_sec;
fd = (*EsdAudioOpen)();
if (fd < 0)
return NS_ERROR_FAILURE;
(*EsdAudioWrite)(audio, audio_len);
(*EsdAudioClose)();
} else {
while (audio_len > 0) {
size_t written = write(fd, audio, audio_len);
if (written <= 0)
break;
audio += written;
audio_len -= written;
}
close(fd);
}
return NS_OK;
}
NS_METHOD nsSound::Play(nsIURL *aURL)
{
nsresult rv;
if (!mInited)
Init();
if (!elib)
return NS_ERROR_NOT_AVAILABLE;
nsCOMPtr<nsIStreamLoader> loader;
rv = NS_NewStreamLoader(getter_AddRefs(loader), aURL, this);
return rv;
}
NS_IMETHODIMP nsSound::PlaySystemSound(const nsAString &aSoundAlias)
{
if (NS_IsMozAliasSound(aSoundAlias)) {
NS_WARNING("nsISound::playSystemSound is called with \"_moz_\" events, they are obsolete, use nsISound::playEventSound instead");
if (aSoundAlias.Equals(NS_SYSSOUND_MAIL_BEEP))
return Beep();
return NS_OK;
}
nsresult rv;
nsCOMPtr <nsIURI> fileURI;
// create a nsIFile and then a nsIFileURL from that
nsCOMPtr <nsIFile> soundFile;
rv = NS_NewLocalFile(aSoundAlias, true,
getter_AddRefs(soundFile));
NS_ENSURE_SUCCESS(rv,rv);
rv = NS_NewFileURI(getter_AddRefs(fileURI), soundFile);
NS_ENSURE_SUCCESS(rv,rv);
nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(fileURI,&rv);
NS_ENSURE_SUCCESS(rv,rv);
rv = Play(fileURL);
return rv;
}
NS_IMETHODIMP nsSound::PlayEventSound(uint32_t aEventId)
{
return aEventId == EVENT_NEW_MAIL_RECEIVED ? Beep() : NS_OK;
}