chromium/ppapi/c/ppb_audio.h

/* Copyright 2012 The Chromium Authors
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

/* From ppb_audio.idl modified Fri Jan 24 16:18:44 2014. */

#ifndef PPAPI_C_PPB_AUDIO_H_
#define PPAPI_C_PPB_AUDIO_H_

#include "ppapi/c/pp_bool.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/c/pp_macros.h"
#include "ppapi/c/pp_resource.h"
#include "ppapi/c/pp_stdint.h"
#include "ppapi/c/pp_time.h"

#define PPB_AUDIO_INTERFACE_1_0 …
#define PPB_AUDIO_INTERFACE_1_1 …
#define PPB_AUDIO_INTERFACE …

/**
 * @file
 * This file defines the <code>PPB_Audio</code> interface, which provides
 * realtime stereo audio streaming capabilities.
 */


/**
 * @addtogroup Typedefs
 * @{
 */
/**
 * <code>PPB_Audio_Callback</code> defines the type of an audio callback
 * function used to fill the audio buffer with data. Please see the
 * Create() function in the <code>PPB_Audio</code> interface for
 * more details on this callback.
 *
 * @param[in] sample_buffer A buffer to fill with audio data.
 * @param[in] buffer_size_in_bytes The size of the buffer in bytes.
 * @param[in] latency How long before the audio data is to be presented.
 * @param[inout] user_data An opaque pointer that was passed into
 * <code>PPB_Audio.Create()</code>.
 */
PPB_Audio_Callback;

PPB_Audio_Callback_1_0;
/**
 * @}
 */

/**
 * @addtogroup Interfaces
 * @{
 */
/**
 * The <code>PPB_Audio</code> interface contains pointers to several functions
 * for handling audio resources. Refer to the
 * <a href="/native-client/devguide/coding/audio.html">Audio</a>
 * chapter in the Developer's Guide for information on using this interface.
 * Please see descriptions for each <code>PPB_Audio</code> and
 * <code>PPB_AudioConfig</code> function for more details. A C example using
 * <code>PPB_Audio</code> and <code>PPB_AudioConfig</code> follows.
 *
 * <strong>Example: </strong>
 *
 * @code
 * void audio_callback(void* sample_buffer,
 *                     uint32_t buffer_size_in_bytes,
 *                     void* user_data) {
 *   ... quickly fill in the buffer with samples and return to caller ...
 *  }
 *
 * ...Assume the application has cached the audio configuration interface in
 * audio_config_interface and the audio interface in
 * audio_interface...
 *
 * uint32_t count = audio_config_interface->RecommendSampleFrameCount(
 *     PP_AUDIOSAMPLERATE_44100, 4096);
 * PP_Resource pp_audio_config = audio_config_interface->CreateStereo16Bit(
 *     pp_instance, PP_AUDIOSAMPLERATE_44100, count);
 * PP_Resource pp_audio = audio_interface->Create(pp_instance, pp_audio_config,
 *     audio_callback, NULL);
 * audio_interface->StartPlayback(pp_audio);
 *
 * ...audio_callback() will now be periodically invoked on a separate thread...
 * @endcode
 */
struct PPB_Audio_1_1 { … };

PPB_Audio;

struct PPB_Audio_1_0 { … };
/**
 * @}
 */

#endif  /* PPAPI_C_PPB_AUDIO_H_ */