/*=========================================================================\
*?Copyright（C）2016?Chudai.
*
*?File?name????:?audio.c
*?Version??????:?v1.0.0
*?Author???????:?初代
*?Date?????????:?2016/10/06
*?Description??:
*?Function?list:?1.
*????????????????2.
*????????????????3.
*?History??????:
\*=========================================================================*/
#include?“stdafx.h“
/*-----------------------------------------------------------*
?*?頭文件????????????????????????????????????????????????????*
?*-----------------------------------------------------------*/
#define?__STDC_CONSTANT_MACROS??????//ffmpeg要求

#include?“player.h“
#include?“audio.h“

/*======================================================================\
*?Author?????（作者）:?i.sshe
*?Date???????（日期）:?2016/10/06
*?Others?????（其他）:?準(zhǔn)備audio
\*=======================================================================*/
int?prepare_audio（PlayerState?*ps）
{

	ps->paudio_stream?=?ps->pformat_ctx->streams[ps->audio_stream_index];
	ps->paudio_codec_ctx?=?	ps->paudio_stream->codec;
	ps->paudio_codec?=?avcodec_find_decoder（ps->paudio_codec_ctx->codec_id）;
	if?（ps->paudio_codec?==?NULL）
????{
?????????fprintf（ERR_STREAM?“Couldn‘t?find?audio?decoder!!!!!!!\n“）;
?????????return?-1;
????}
	//初始化AVCondecContext，以及進行一些處理工作。
	avcodec_open2（ps->paudio_codec_ctx?ps->paudio_codec?NULL）;

????return?0;
}


/*======================================================================\
*?Author?????（作者）:?i.sshe
*?Date???????（日期）:?2016/10/06
*?Others?????（其他）:?播放聲音
\*=======================================================================*/
int?play_audio（PlayerState?*ps）
{
????SDL_AudioSpec??????wanted_spec;
//????SDL_AudioSpec??????spec;
????wanted_spec.freq??????=?ps->paudio_codec_ctx->sample_rate;
????wanted_spec.format????=?AUDIO_S16SYS;
????wanted_spec.channels??=?ps->paudio_codec_ctx->channels;
????wanted_spec.silence???=?0;
????wanted_spec.samples???=?1024;?????//
????wanted_spec.callback??=?audio_callback;
????wanted_spec.userdata??=?ps;?//?ps->paudio_codec_ctx;

????//打開音頻設(shè)備
????//運行callback
????if?（SDL_OpenAudio（&wanted_spec?NULL）?????{
????????fprintf（ERR_STREAM?“Couldn‘t?open?audio?device\n“）;
????????return?-1;
????}

????SDL_PauseAudio（0）;

????return?0;
}


/*======================================================================\
*?Author?????（作者）:?i.sshe
*?Date???????（日期）:?2016/10/06
*?Others?????（其他）:?音頻回調(diào)函數(shù)，打開設(shè)備的時候會開線程調(diào)用
\*=======================================================================*/
void?audio_callback（void?*userdata?uint8_t?*stream?int?len）
{
????PlayerState?*ps?=?（PlayerState?*）userdata;
????int?		send_data_size?=?0;
????int?		audio_size?=?0;

	if?（ps->quit?==?1）
	{
		exit（-1）;
	}


????SDL_memset（stream?0?len）;


????while（len?>?0）
????{
?????????if?（ps->audio_buf_index?>=?ps->audio_buf_size）
?????????{
?????????????//數(shù)據(jù)已經(jīng)全部發(fā)送，再去取
?????????????audio_size?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-10-09?12:26??player_v1.4.1\
?????目錄???????????0??2016-10-09?12:25??player_v1.4.1\Debug\
?????文件???????41984??2016-10-09?12:26??player_v1.4.1\Debug\player_v1.4.1.exe
?????文件??????449304??2016-10-09?12:26??player_v1.4.1\Debug\player_v1.4.1.ilk
?????文件??????715776??2016-10-09?12:26??player_v1.4.1\Debug\player_v1.4.1.pdb
?????目錄???????????0??2016-10-09?12:15??player_v1.4.1\ipch\
?????目錄???????????0??2016-10-09?12:22??player_v1.4.1\ipch\player_v1.4.1-a4430eb1\
?????文件?????2359296??2016-10-09?12:22??player_v1.4.1\ipch\player_v1.4.1-a4430eb1\player_v1.4.ipch
?????目錄???????????0??2016-10-09?12:25??player_v1.4.1\player_v1.4.1\
?????目錄???????????0??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\
?????文件??????107066??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\CL.read.1.tlog
?????文件????????4470??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\CL.write.1.tlog
?????文件???????33202??2016-10-09?12:25??player_v1.4.1\player_v1.4.1\Debug\audio.obj
?????文件????????5566??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\cl.command.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link-cvtres.read.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link-cvtres.write.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.11936-cvtres.read.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.11936-cvtres.write.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.11936.read.1.tlog
?????文件???????????2??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.11936.write.1.tlog
?????文件????????3388??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.command.1.tlog
?????文件????????7492??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.read.1.tlog
?????文件????????2244??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\link.write.1.tlog
?????文件?????????498??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\mt.command.1.tlog
?????文件?????????498??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\mt.read.1.tlog
?????文件?????????498??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\mt.write.1.tlog
?????文件???????26011??2016-10-09?12:25??player_v1.4.1\player_v1.4.1\Debug\packet_queue.obj
?????文件?????????406??2016-10-09?12:25??player_v1.4.1\player_v1.4.1\Debug\player_v1.4.1.exe.embed.manifest
?????文件?????????472??2016-10-09?12:25??player_v1.4.1\player_v1.4.1\Debug\player_v1.4.1.exe.embed.manifest.res
?????文件?????????381??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\player_v1.4.1.exe.intermediate.manifest
?????文件??????????93??2016-10-09?12:26??player_v1.4.1\player_v1.4.1\Debug\player_v1.4.1.lastbuildstate
............此處省略215個文件信息