cmds/bootanimation/AudioPlayer.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #define LOG_NDEBUG 0
 #define LOG_TAG "BootAnim_AudioPlayer"

 #include "AudioPlayer.h"

 #include <androidfw/ZipFileRO.h>
 #include <tinyalsa/asoundlib.h>
 #include <utils/Log.h>
 #include <utils/String8.h>

 #define ID_RIFF 0x46464952
 #define ID_WAVE 0x45564157
 #define ID_FMT  0x20746d66
 #define ID_DATA 0x61746164

 // Maximum line length for audio_conf.txt
 // We only accept lines less than this length to avoid overflows using sscanf()
 #define MAX_LINE_LENGTH 1024

 struct riff_wave_header {
     uint32_t riff_id;
     uint32_t riff_sz;
     uint32_t wave_id;
 };

 struct chunk_header {
     uint32_t id;
     uint32_t sz;
 };

 struct chunk_fmt {
     uint16_t audio_format;
     uint16_t num_channels;
     uint32_t sample_rate;
     uint32_t byte_rate;
     uint16_t block_align;
     uint16_t bits_per_sample;
 };


 namespace android {

 AudioPlayer::AudioPlayer()
     :   mCard(-1),
         mDevice(-1),
         mPeriodSize(0),
         mPeriodCount(0),
         mCurrentFile(NULL)
 {
 }

 AudioPlayer::~AudioPlayer() {
 }

 static bool setMixerValue(struct mixer* mixer, const char* name, const char* values)
 {
     if (!mixer) {
         ALOGE("no mixer in setMixerValue");
         return false;
     }
     struct mixer_ctl *ctl = mixer_get_ctl_by_name(mixer, name);
     if (!ctl) {
         ALOGE("mixer_get_ctl_by_name failed for %s", name);
         return false;
     }

     enum mixer_ctl_type type = mixer_ctl_get_type(ctl);
     int numValues = mixer_ctl_get_num_values(ctl);
     int intValue;
     char stringValue[MAX_LINE_LENGTH];

     for (int i = 0; i < numValues && values; i++) {
         // strip leading space
         while (*values == ' ') values++;
         if (*values == 0) break;

         switch (type) {
             case MIXER_CTL_TYPE_BOOL:
             case MIXER_CTL_TYPE_INT:
                 if (sscanf(values, "%d", &intValue) == 1) {
                     if (mixer_ctl_set_value(ctl, i, intValue) != 0) {
                         ALOGE("mixer_ctl_set_value failed for %s %d", name, intValue);
                     }
                 } else {
                     ALOGE("Could not parse %s as int for %s", values, name);
                 }
                 break;
             case MIXER_CTL_TYPE_ENUM:
                 if (sscanf(values, "%s", stringValue) == 1) {
                     if (mixer_ctl_set_enum_by_string(ctl, stringValue) != 0) {
                         ALOGE("mixer_ctl_set_enum_by_string failed for %s %s", name, stringValue);
                     }
                 } else {
                     ALOGE("Could not parse %s as enum for %s", values, name);
                 }
                 break;
             default:
                 ALOGE("unsupported mixer type %d for %s", type, name);
                 break;
         }

         values = strchr(values, ' ');
     }

     return true;
 }


 /*
  * Parse the audio configuration file.
  * The file is named audio_conf.txt and must begin with the following header:
  *
  * card=<ALSA card number>
  * device=<ALSA device number>
  * period_size=<period size>
  * period_count=<period count>
  *
  * This header is followed by zero or more mixer settings, each with the format:
  * mixer "<name>" = <value list>
  * Since mixer names can contain spaces, the name must be enclosed in double quotes.
  * The values in the value list can be integers, booleans (represented by 0 or 1)
  * or strings for enum values.
  */
 bool AudioPlayer::init(const char* config)
 {
     int tempInt;
     struct mixer* mixer = NULL;
     char    name[MAX_LINE_LENGTH];

     for (;;) {
         const char* endl = strstr(config, "\n");
         if (!endl) break;
         String8 line(config, endl - config);
         if (line.length() >= MAX_LINE_LENGTH) {
             ALOGE("Line too long in audio_conf.txt");
             return false;
         }
         const char* l = line.string();

         if (sscanf(l, "card=%d", &tempInt) == 1) {
             ALOGD("card=%d", tempInt);
             mCard = tempInt;

             mixer = mixer_open(mCard);
             if (!mixer) {
                 ALOGE("could not open mixer for card %d", mCard);
                 return false;
             }
         } else if (sscanf(l, "device=%d", &tempInt) == 1) {
             ALOGD("device=%d", tempInt);
             mDevice = tempInt;
         } else if (sscanf(l, "period_size=%d", &tempInt) == 1) {
             ALOGD("period_size=%d", tempInt);
             mPeriodSize = tempInt;
         } else if (sscanf(l, "period_count=%d", &tempInt) == 1) {
             ALOGD("period_count=%d", tempInt);
             mPeriodCount = tempInt;
         } else if (sscanf(l, "mixer \"%[0-9a-zA-Z _]s\"", name) == 1) {
             const char* values = strchr(l, '=');
             if (values) {
                 values++;   // skip '='
                 ALOGD("name: \"%s\" = %s", name, values);
                 setMixerValue(mixer, name, values);
             } else {
                 ALOGE("values missing for name: \"%s\"", name);
             }
         }
         config = ++endl;
     }

     mixer_close(mixer);

     if (mCard >= 0 && mDevice >= 0) {
         return true;
     }

     return false;
 }

 void AudioPlayer::playFile(FileMap* fileMap) {
     // stop any currently playing sound
     requestExitAndWait();

     mCurrentFile = fileMap;
     run("bootanim audio", PRIORITY_URGENT_AUDIO);
 }

 bool AudioPlayer::threadLoop()
 {
     struct pcm_config config;
     struct pcm *pcm = NULL;
     bool moreChunks = true;
     const struct chunk_fmt* chunkFmt = NULL;
     int bufferSize;
     const uint8_t* wavData;
     size_t wavLength;
     const struct riff_wave_header* wavHeader;

     if (mCurrentFile == NULL) {
         ALOGE("mCurrentFile is NULL");
         return false;
      }

     wavData = (const uint8_t *)mCurrentFile->getDataPtr();
     if (!wavData) {
         ALOGE("Could not access WAV file data");
         goto exit;
     }
     wavLength = mCurrentFile->getDataLength();

     wavHeader = (const struct riff_wave_header *)wavData;
     if (wavLength < sizeof(*wavHeader) || (wavHeader->riff_id != ID_RIFF) ||
         (wavHeader->wave_id != ID_WAVE)) {
         ALOGE("Error: audio file is not a riff/wave file\n");
         goto exit;
     }
     wavData += sizeof(*wavHeader);
     wavLength -= sizeof(*wavHeader);

     do {
         const struct chunk_header* chunkHeader = (const struct chunk_header*)wavData;
         if (wavLength < sizeof(*chunkHeader)) {
             ALOGE("EOF reading chunk headers");
             goto exit;
         }

         wavData += sizeof(*chunkHeader);
         wavLength -=  sizeof(*chunkHeader);

         switch (chunkHeader->id) {
             case ID_FMT:
                 chunkFmt = (const struct chunk_fmt *)wavData;
                 wavData += chunkHeader->sz;
                 wavLength -= chunkHeader->sz;
                 break;
             case ID_DATA:
                 /* Stop looking for chunks */
                 moreChunks = 0;
                 break;
             default:
                 /* Unknown chunk, skip bytes */
                 wavData += chunkHeader->sz;
                 wavLength -= chunkHeader->sz;
         }
     } while (moreChunks);

     if (!chunkFmt) {
         ALOGE("format not found in WAV file");
         goto exit;
     }


     memset(&config, 0, sizeof(config));
     config.channels = chunkFmt->num_channels;
     config.rate = chunkFmt->sample_rate;
     config.period_size = mPeriodSize;
     config.period_count = mPeriodCount;
     config.start_threshold = mPeriodSize / 4;
     config.stop_threshold = INT_MAX;
     config.avail_min = config.start_threshold;
     if (chunkFmt->bits_per_sample != 16) {
         ALOGE("only 16 bit WAV files are supported");
         goto exit;
     }
     config.format = PCM_FORMAT_S16_LE;

     pcm = pcm_open(mCard, mDevice, PCM_OUT, &config);
     if (!pcm || !pcm_is_ready(pcm)) {
         ALOGE("Unable to open PCM device (%s)\n", pcm_get_error(pcm));
         goto exit;
     }

     bufferSize = pcm_frames_to_bytes(pcm, pcm_get_buffer_size(pcm));

     while (wavLength > 0) {
         if (exitPending()) goto exit;
         size_t count = bufferSize;
         if (count > wavLength)
             count = wavLength;

         if (pcm_write(pcm, wavData, count)) {
             ALOGE("pcm_write failed (%s)", pcm_get_error(pcm));
             goto exit;
         }
         wavData += count;
         wavLength -= count;
     }

 exit:
     if (pcm)
         pcm_close(pcm);
     delete mCurrentFile;
     mCurrentFile = NULL;
     return false;
 }

 } // namespace android
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#define LOG_NDEBUG 0
	#define LOG_TAG "BootAnim_AudioPlayer"

	#include "AudioPlayer.h"

	#include <androidfw/ZipFileRO.h>
	#include <tinyalsa/asoundlib.h>
	#include <utils/Log.h>
	#include <utils/String8.h>

	#define ID_RIFF 0x46464952
	#define ID_WAVE 0x45564157
	#define ID_FMT 0x20746d66
	#define ID_DATA 0x61746164

	// Maximum line length for audio_conf.txt
	// We only accept lines less than this length to avoid overflows using sscanf()
	#define MAX_LINE_LENGTH 1024

	struct riff_wave_header {
	uint32_t riff_id;
	uint32_t riff_sz;
	uint32_t wave_id;
	};

	struct chunk_header {
	uint32_t id;
	uint32_t sz;
	};

	struct chunk_fmt {
	uint16_t audio_format;
	uint16_t num_channels;
	uint32_t sample_rate;
	uint32_t byte_rate;
	uint16_t block_align;
	uint16_t bits_per_sample;
	};


	namespace android {

	AudioPlayer::AudioPlayer()
	: mCard(-1),
	mDevice(-1),
	mPeriodSize(0),
	mPeriodCount(0),
	mCurrentFile(NULL)
	{
	}

	AudioPlayer::~AudioPlayer() {
	}

	static bool setMixerValue(struct mixer* mixer, const char* name, const char* values)
	{
	if (!mixer) {
	ALOGE("no mixer in setMixerValue");
	return false;
	}
	struct mixer_ctl *ctl = mixer_get_ctl_by_name(mixer, name);
	if (!ctl) {
	ALOGE("mixer_get_ctl_by_name failed for %s", name);
	return false;
	}

	enum mixer_ctl_type type = mixer_ctl_get_type(ctl);
	int numValues = mixer_ctl_get_num_values(ctl);
	int intValue;
	char stringValue[MAX_LINE_LENGTH];

	for (int i = 0; i < numValues && values; i++) {
	// strip leading space
	while (*values == ' ') values++;
	if (*values == 0) break;

	switch (type) {
	case MIXER_CTL_TYPE_BOOL:
	case MIXER_CTL_TYPE_INT:
	if (sscanf(values, "%d", &intValue) == 1) {
	if (mixer_ctl_set_value(ctl, i, intValue) != 0) {
	ALOGE("mixer_ctl_set_value failed for %s %d", name, intValue);
	}
	} else {
	ALOGE("Could not parse %s as int for %s", values, name);
	}
	break;
	case MIXER_CTL_TYPE_ENUM:
	if (sscanf(values, "%s", stringValue) == 1) {
	if (mixer_ctl_set_enum_by_string(ctl, stringValue) != 0) {
	ALOGE("mixer_ctl_set_enum_by_string failed for %s %s", name, stringValue);
	}
	} else {
	ALOGE("Could not parse %s as enum for %s", values, name);
	}
	break;
	default:
	ALOGE("unsupported mixer type %d for %s", type, name);
	break;
	}

	values = strchr(values, ' ');
	}

	return true;
	}


	/*
	* Parse the audio configuration file.
	* The file is named audio_conf.txt and must begin with the following header:
	*
	* card=<ALSA card number>
	* device=<ALSA device number>
	* period_size=<period size>
	* period_count=<period count>
	*
	* This header is followed by zero or more mixer settings, each with the format:
	* mixer "<name>" = <value list>
	* Since mixer names can contain spaces, the name must be enclosed in double quotes.
	* The values in the value list can be integers, booleans (represented by 0 or 1)
	* or strings for enum values.
	*/
	bool AudioPlayer::init(const char* config)
	{
	int tempInt;
	struct mixer* mixer = NULL;
	char name[MAX_LINE_LENGTH];

	for (;;) {
	const char* endl = strstr(config, "\n");
	if (!endl) break;
	String8 line(config, endl - config);
	if (line.length() >= MAX_LINE_LENGTH) {
	ALOGE("Line too long in audio_conf.txt");
	return false;
	}
	const char* l = line.string();

	if (sscanf(l, "card=%d", &tempInt) == 1) {
	ALOGD("card=%d", tempInt);
	mCard = tempInt;

	mixer = mixer_open(mCard);
	if (!mixer) {
	ALOGE("could not open mixer for card %d", mCard);
	return false;
	}
	} else if (sscanf(l, "device=%d", &tempInt) == 1) {
	ALOGD("device=%d", tempInt);
	mDevice = tempInt;
	} else if (sscanf(l, "period_size=%d", &tempInt) == 1) {
	ALOGD("period_size=%d", tempInt);
	mPeriodSize = tempInt;
	} else if (sscanf(l, "period_count=%d", &tempInt) == 1) {
	ALOGD("period_count=%d", tempInt);
	mPeriodCount = tempInt;
	} else if (sscanf(l, "mixer \"%[0-9a-zA-Z _]s\"", name) == 1) {
	const char* values = strchr(l, '=');
	if (values) {
	values++; // skip '='
	ALOGD("name: \"%s\" = %s", name, values);
	setMixerValue(mixer, name, values);
	} else {
	ALOGE("values missing for name: \"%s\"", name);
	}
	}
	config = ++endl;
	}

	mixer_close(mixer);

	if (mCard >= 0 && mDevice >= 0) {
	return true;
	}

	return false;
	}

	void AudioPlayer::playFile(FileMap* fileMap) {
	// stop any currently playing sound
	requestExitAndWait();

	mCurrentFile = fileMap;
	run("bootanim audio", PRIORITY_URGENT_AUDIO);
	}

	bool AudioPlayer::threadLoop()
	{
	struct pcm_config config;
	struct pcm *pcm = NULL;
	bool moreChunks = true;
	const struct chunk_fmt* chunkFmt = NULL;
	int bufferSize;
	const uint8_t* wavData;
	size_t wavLength;
	const struct riff_wave_header* wavHeader;

	if (mCurrentFile == NULL) {
	ALOGE("mCurrentFile is NULL");
	return false;
	}

	wavData = (const uint8_t *)mCurrentFile->getDataPtr();
	if (!wavData) {
	ALOGE("Could not access WAV file data");
	goto exit;
	}
	wavLength = mCurrentFile->getDataLength();

	wavHeader = (const struct riff_wave_header *)wavData;
	if (wavLength < sizeof(*wavHeader) \|\| (wavHeader->riff_id != ID_RIFF) \|\|
	(wavHeader->wave_id != ID_WAVE)) {
	ALOGE("Error: audio file is not a riff/wave file\n");
	goto exit;
	}
	wavData += sizeof(*wavHeader);
	wavLength -= sizeof(*wavHeader);

	do {
	const struct chunk_header* chunkHeader = (const struct chunk_header*)wavData;
	if (wavLength < sizeof(*chunkHeader)) {
	ALOGE("EOF reading chunk headers");
	goto exit;
	}

	wavData += sizeof(*chunkHeader);
	wavLength -= sizeof(*chunkHeader);

	switch (chunkHeader->id) {
	case ID_FMT:
	chunkFmt = (const struct chunk_fmt *)wavData;
	wavData += chunkHeader->sz;
	wavLength -= chunkHeader->sz;
	break;
	case ID_DATA:
	/* Stop looking for chunks */
	moreChunks = 0;
	break;
	default:
	/* Unknown chunk, skip bytes */
	wavData += chunkHeader->sz;
	wavLength -= chunkHeader->sz;
	}
	} while (moreChunks);

	if (!chunkFmt) {
	ALOGE("format not found in WAV file");
	goto exit;
	}


	memset(&config, 0, sizeof(config));
	config.channels = chunkFmt->num_channels;
	config.rate = chunkFmt->sample_rate;
	config.period_size = mPeriodSize;
	config.period_count = mPeriodCount;
	config.start_threshold = mPeriodSize / 4;
	config.stop_threshold = INT_MAX;
	config.avail_min = config.start_threshold;
	if (chunkFmt->bits_per_sample != 16) {
	ALOGE("only 16 bit WAV files are supported");
	goto exit;
	}
	config.format = PCM_FORMAT_S16_LE;

	pcm = pcm_open(mCard, mDevice, PCM_OUT, &config);
	if (!pcm \|\| !pcm_is_ready(pcm)) {
	ALOGE("Unable to open PCM device (%s)\n", pcm_get_error(pcm));
	goto exit;
	}

	bufferSize = pcm_frames_to_bytes(pcm, pcm_get_buffer_size(pcm));

	while (wavLength > 0) {
	if (exitPending()) goto exit;
	size_t count = bufferSize;
	if (count > wavLength)
	count = wavLength;

	if (pcm_write(pcm, wavData, count)) {
	ALOGE("pcm_write failed (%s)", pcm_get_error(pcm));
	goto exit;
	}
	wavData += count;
	wavLength -= count;
	}

	exit:
	if (pcm)
	pcm_close(pcm);
	delete mCurrentFile;
	mCurrentFile = NULL;
	return false;
	}

	} // namespace android