1 files changed, 314 insertions, 0 deletions
diff --git a/cmds/bootanimation/AudioPlayer.cpp b/cmds/bootanimation/AudioPlayer.cpp
new file mode 100644
index 0000000..471b77f
--- /dev/null
+++ b/cmds/bootanimation/AudioPlayer.cpp
@@ -0,0 +1,314 @@
+/*
+ * 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 %d", intValue, 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 %d", stringValue, 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(struct 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;
+    void* buffer = 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);
+    mCurrentFile->release();
+    mCurrentFile = NULL;
+    return false;
+}
+
+} // namespace android