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ve_play.cpp
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ve_play.cpp
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/*
*
*
* VideoEye
*
* 雷霄骅 Lei Xiaohua
* 中国传媒大学/数字电视技术
* Communication University of China / Digital TV Technology
* http://blog.csdn.net/leixiaohua1020
*
*/
#include "stdafx.h"
#include "ve_play.h"
const char program_name[] = "VE_Player";
const int program_birth_year = 2013;
#define MAX_QUEUE_SIZE (15 * 1024 * 1024)
#define MIN_FRAMES 5
/* SDL audio buffer size, in samples. Should be small to have precise
A/V sync as SDL does not have hardware buffer fullness info. */
#define SDL_AUDIO_BUFFER_SIZE 1024
/* no AV sync correction is done if below the AV sync threshold */
#define AV_SYNC_THRESHOLD 0.01
/* no AV correction is done if too big error */
#define AV_NOSYNC_THRESHOLD 10.0
/* maximum audio speed change to get correct sync */
#define SAMPLE_CORRECTION_PERCENT_MAX 10
/* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
#define AUDIO_DIFF_AVG_NB 20
/* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
/* TODO: We assume that a decoded and resampled frame fits into this buffer */
#define SAMPLE_ARRAY_SIZE (8 * 65536)
static int sws_flags = SWS_BICUBIC;
//读取输入文件协议的时候使用；来自ffmpeg源码
typedef struct URLContext {
const AVClass *av_class; ///< information for av_log(). Set by url_open().
struct URLProtocol *prot;
int flags;
int is_streamed; /**< true if streamed (no seek possible), default = false */
int max_packet_size; /**< if non zero, the stream is packetized with this max packet size */
void *priv_data;
char *filename; /**< specified URL */
int is_connected;
AVIOInterruptCB interrupt_callback;
} URLContext;
typedef struct URLProtocol {
const char *name;
int (*url_open)(URLContext *h, const char *url, int flags);
int (*url_read)(URLContext *h, unsigned char *buf, int size);
int (*url_write)(URLContext *h, const unsigned char *buf, int size);
int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
int (*url_close)(URLContext *h);
struct URLProtocol *next;
int (*url_read_pause)(URLContext *h, int pause);
int64_t (*url_read_seek)(URLContext *h, int stream_index,
int64_t timestamp, int flags);
int (*url_get_file_handle)(URLContext *h);
int priv_data_size;
const AVClass *priv_data_class;
int flags;
int (*url_check)(URLContext *h, int mask);
} URLProtocol;
//---------------------
typedef struct PacketQueue {
AVPacketList *first_pkt, *last_pkt;
int nb_packets;
int size;
int abort_request;
SDL_mutex *mutex;
SDL_cond *cond;
} PacketQueue;
#define VIDEO_PICTURE_QUEUE_SIZE 4
#define SUBPICTURE_QUEUE_SIZE 4
long rint(double x)
{
if(x >= 0.)
return (long)(x + 0.5);
else
return (long)(x - 0.5);
}
typedef struct VideoPicture {
double pts; ///< presentation time stamp for this picture
int64_t pos; ///< byte position in file
int skip;
SDL_Overlay *bmp;
int width, height; /* source height & width */
AVRational sample_aspect_ratio;
int allocated;
int reallocate;
#if CONFIG_AVFILTER
AVFilterBufferRef *picref;
#endif
} VideoPicture;
typedef struct SubPicture {
double pts; /* presentation time stamp for this picture */
AVSubtitle sub;
} SubPicture;
typedef struct AudioParams {
int freq;
int channels;
int channel_layout;
enum AVSampleFormat fmt;
} AudioParams;
enum {
AV_SYNC_AUDIO_MASTER, /* default choice */
AV_SYNC_VIDEO_MASTER,
AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
};
//视频显示方式
enum V_Show_Mode {
SHOW_MODE_YUV = 0, SHOW_MODE_Y, SHOW_MODE_U, SHOW_MODE_V
};
typedef struct VideoState {
SDL_Thread *read_tid;
SDL_Thread *video_tid;
SDL_Thread *refresh_tid;
AVInputFormat *iformat;
int no_background;
int abort_request;
int force_refresh;
int paused;
int last_paused;
int que_attachments_req;
int seek_req;
int seek_flags;
int64_t seek_pos;
int64_t seek_rel;
int read_pause_return;
AVFormatContext *ic;
int audio_stream;
int av_sync_type;
double external_clock; /* external clock base */
int64_t external_clock_time;
double audio_clock;
double audio_diff_cum; /* used for AV difference average computation */
double audio_diff_avg_coef;
double audio_diff_threshold;
int audio_diff_avg_count;
AVStream *audio_st;
PacketQueue audioq;
int audio_hw_buf_size;
DECLARE_ALIGNED(16,uint8_t,audio_buf2)[AVCODEC_MAX_AUDIO_FRAME_SIZE * 4];
uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
uint8_t *audio_buf;
uint8_t *audio_buf1;
unsigned int audio_buf_size; /* in bytes */
int audio_buf_index; /* in bytes */
int audio_write_buf_size;
AVPacket audio_pkt_temp;
AVPacket audio_pkt;
struct AudioParams audio_src;
struct AudioParams audio_tgt;
struct SwrContext *swr_ctx;
double audio_current_pts;
double audio_current_pts_drift;
int frame_drops_early;
int frame_drops_late;
AVFrame *frame;
enum ShowMode {
SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
} show_mode;
int16_t sample_array[SAMPLE_ARRAY_SIZE];
int sample_array_index;
int last_i_start;
RDFTContext *rdft;
int rdft_bits;
FFTSample *rdft_data;
int xpos;
SDL_Thread *subtitle_tid;
int subtitle_stream;
int subtitle_stream_changed;
AVStream *subtitle_st;
PacketQueue subtitleq;
SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
int subpq_size, subpq_rindex, subpq_windex;
SDL_mutex *subpq_mutex;
SDL_cond *subpq_cond;
double frame_timer;
double frame_last_pts;
double frame_last_duration;
double frame_last_dropped_pts;
double frame_last_returned_time;
double frame_last_filter_delay;
int64_t frame_last_dropped_pos;
double video_clock; ///< pts of last decoded frame / predicted pts of next decoded frame
int video_stream;
AVStream *video_st;
PacketQueue videoq;
double video_current_pts; ///< current displayed pts (different from video_clock if frame fifos are used)
double video_current_pts_drift; ///< video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
int64_t video_current_pos; ///< current displayed file pos
VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
int pictq_size, pictq_rindex, pictq_windex;
SDL_mutex *pictq_mutex;
SDL_cond *pictq_cond;
#if !CONFIG_AVFILTER
struct SwsContext *img_convert_ctx;
#endif
char filename[1024];
int width, height, xleft, ytop;
int step;
#if CONFIG_AVFILTER
AVFilterContext *in_video_filter; ///< the first filter in the video chain
AVFilterContext *out_video_filter; ///< the last filter in the video chain
int use_dr1;
FrameBuffer *buffer_pool;
#endif
int refresh;
int last_video_stream, last_audio_stream, last_subtitle_stream;
SDL_cond *continue_read_thread;
//视频显示方式------------
enum V_Show_Mode v_show_mode;
} VideoState;
VideoState *g_is = NULL;
enum ShowMode {
SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
} ;
//指向MFC窗口的指针
CVideoEyeDlg * dlg;
/* options specified by the user */
static AVInputFormat *file_iformat;
static const char *input_filename;
static const char *window_title;
static int fs_screen_width;
static int fs_screen_height;
static int screen_width = 0;
static int screen_height = 0;
static int audio_disable ;
static int video_disable ;
static int wanted_stream[AVMEDIA_TYPE_NB] = {-1,-1,0,-1,0};
// [AVMEDIA_TYPE_AUDIO] = -1,
// [AVMEDIA_TYPE_VIDEO] = -1,
// [AVMEDIA_TYPE_SUBTITLE] = -1,};
static int seek_by_bytes = -1;
static int display_disable;
static int show_status = 1;
static int av_sync_type = AV_SYNC_AUDIO_MASTER;
static int64_t start_time = AV_NOPTS_VALUE;
static int64_t duration = AV_NOPTS_VALUE;
static int workaround_bugs = 1;
static int fast = 0;
static int genpts = 0;
static int lowres = 0;
static int idct = FF_IDCT_AUTO;
static enum AVDiscard skip_frame = AVDISCARD_DEFAULT;
static enum AVDiscard skip_idct = AVDISCARD_DEFAULT;
static enum AVDiscard skip_loop_filter = AVDISCARD_DEFAULT;
static int error_concealment = 3;
static int decoder_reorder_pts = -1;
static int autoexit;
static int exit_on_keydown;
static int exit_on_mousedown;
static int loop = 1;
static int framedrop = -1;
static int infinite_buffer = -1;
static enum ShowMode show_mode = SHOW_MODE_NONE;
static const char *audio_codec_name;
static const char *subtitle_codec_name;
static const char *video_codec_name;
static int rdftspeed = 20;
#if CONFIG_AVFILTER
static char *vfilters = NULL;
#endif
/* current context */
static int is_full_screen;
static int64_t audio_callback_time;
static AVPacket flush_pkt;
//特殊容器（FLV，MP4等）输出h.264原始码流--------------
//需要在码流文件前面加上SPS,PPS------------
int dataoutput_h264_ft;
#define FF_ALLOC_EVENT (SDL_USEREVENT)
#define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
#define FF_QUIT_EVENT (SDL_USEREVENT + 2)
//---------------------------
//自定义一个事件，用于调整播放进度
#define VE_SEEK_BAR_EVENT (SDL_USEREVENT + 4)
int seek_bar_pos;
//是否拉伸-------------------------
#define VE_STRETCH_EVENT (SDL_USEREVENT + 5)
int is_stretch=1;
//--------------------------------
//专门设置的标记，在程序将要退出的时候会置1
static int exit_remark=0;
//---------------------------------
static SDL_Surface *screen;
//视频帧索引
int vframe_index=0;
//音频帧索引
int aframe_index=0;
//Packet索引
int packet_index=0;
int ve_reset_index(){
vframe_index=0;
aframe_index=0;
packet_index=0;
return 0;
}
//设置MFC参数，成功的话返回0，否则返回-1
//全局的，只设置一次
int ve_param_global(VideoState *is){
//初始化
CString input_protocol,input_format,wxh,decoder_name,
decoder_type,bitrate,extention,pix_fmt,framerate,timelong,decoder_name_au,sample_rate_au,channels_au;
float framerate_temp,timelong_temp,bitrate_temp;
//注意：把int等类型转换成LPCTSTR
//CString可以直接赋值给LPCTSTR
AVFormatContext *pFormatCtx = is->ic;
int video_stream=is->video_stream;
int audio_stream=is->audio_stream;
AVCodecContext *pCodecCtx = pFormatCtx->streams[video_stream]->codec;
AVCodecContext *pCodecCtx_au = pFormatCtx->streams[audio_stream]->codec;
#ifdef _UNICODE
USES_CONVERSION;
#endif
if(pFormatCtx->pb!=NULL){
URLContext *uc=(URLContext *)pFormatCtx->pb->opaque;
if(strcmp(is->filename,"read_memory")==0){
dlg->m_input_protocol.SetWindowText(_T("内存读入"));
}else{
URLProtocol *up=(URLProtocol *)uc->prot;
//输入文件的协议----------
#ifdef _UNICODE
input_protocol.Format(_T("%s"),A2W(up->name));
#else
input_protocol.Format(_T("%s"),up->name);
#endif
dlg->m_input_protocol.SetWindowText(input_protocol);
}
}
//视频解码参数，有视频的时候设置
if(video_stream!=-1){
wxh.Format(_T("%d x %d"),pCodecCtx->width,pCodecCtx->height);
dlg->m_wxh.SetWindowText(wxh);
#ifdef _UNICODE
decoder_name.Format(_T("%s"),A2W(pCodecCtx->codec->long_name));
#else
decoder_name.Format(_T("%s"),pCodecCtx->codec->long_name);
#endif
dlg->m_decoder_name.SetWindowText(decoder_name);
//帧率
framerate_temp=(pFormatCtx->streams[video_stream]->r_frame_rate.num)/(pFormatCtx->streams[video_stream]->r_frame_rate.den);
framerate.Format(_T("%5.2ffps"),framerate_temp);
dlg->m_framerate.SetWindowText(framerate);
switch(pCodecCtx->pix_fmt){
case 0:
pix_fmt.Format(_T("YUV420P"));break;
case 1:
pix_fmt.Format(_T("YUYV422"));break;
case 2:
pix_fmt.Format(_T("RGB24"));break;
case 3:
pix_fmt.Format(_T("BGR24"));break;
case 12:
pix_fmt.Format(_T("PIX_FMT_YUVJ420P"));break;
default:
pix_fmt.Format(_T("UNKNOWN"));
}
dlg->m_pix_fmt.SetWindowText(pix_fmt);
}
//音频解码参数，有音频的时候设置
if(audio_stream!=-1){
#ifdef _UNICODE
decoder_name_au.Format(_T("%s"),A2W(pCodecCtx_au->codec->long_name));
#else
decoder_name_au.Format(_T("%s"),pCodecCtx_au->codec->long_name);
#endif
dlg->m_decoder_name_au.SetWindowText(decoder_name_au);
sample_rate_au.Format(_T("%d"),pCodecCtx_au->sample_rate);
dlg->m_sample_rate_au.SetWindowText(sample_rate_au);
channels_au.Format(_T("%d"),pCodecCtx_au->channels);
dlg->m_channels_au.SetWindowText(channels_au);
}
//显示成以k为单位
bitrate_temp=((float)(pFormatCtx->bit_rate))/1000;
bitrate.Format(_T("%5.2fkbps"),bitrate_temp);
dlg->m_bitrate.SetWindowText(bitrate);
//duration是以微秒为单位
timelong_temp=(pFormatCtx->duration)/1000000;
//转换成hh:mm:ss形式
int tns, thh, tmm, tss;
tns = (pFormatCtx->duration)/1000000;
thh = tns / 3600;
tmm = (tns % 3600) / 60;
tss = (tns % 60);
timelong.Format(_T("%02d:%02d:%02d"),thh,tmm,tss);
dlg->m_timelong.SetWindowText(timelong);
dlg->m_duration.SetWindowText(timelong);
//输入文件的封装格式------
#ifdef _UNICODE
input_format.Format(_T("%s"),A2W(pFormatCtx->iformat->long_name));
#else
input_format.Format(_T("%s"),pFormatCtx->iformat->long_name);
#endif
dlg->m_input_format.SetWindowText(input_format);
//------------------------
//bitrate.Format("%d",pCodecCtx->bit_rate);
//dlg->m_bitrate.SetWindowText(bitrate);
#ifdef _UNICODE
extention.Format(_T("%s"),A2W(pFormatCtx->iformat->extensions));
#else
extention.Format(_T("%s"),pFormatCtx->iformat->extensions);
#endif
dlg->m_extention.SetWindowText(extention);
//MetaData------------------------------------------------------------
//从AVDictionary获得
//需要用到AVDictionaryEntry对象
//CString author,copyright,description;
CString meta=NULL,key,value;
AVDictionaryEntry *m = NULL;
//不用一个一个找出来
/* m=av_dict_get(pFormatCtx->metadata,"author",m,0);
author.Format("作者：%s",m->value);
m=av_dict_get(pFormatCtx->metadata,"copyright",m,0);
copyright.Format("版权：%s",m->value);
m=av_dict_get(pFormatCtx->metadata,"description",m,0);
description.Format("描述：%s",m->value);
*/
//使用循环读出
//(需要读取的数据，字段名称，前一条字段（循环时使用），参数)
while(m=av_dict_get(pFormatCtx->metadata,"",m,AV_DICT_IGNORE_SUFFIX)){
#ifdef _UNICODE
key.Format(_T("%s"),A2W(m->key));
value.Format(_T("%s"),A2W(m->value));
meta.AppendFormat(_T("%s\t:%s\r\n"),key,value);
#else
key.Format(_T("%s"),m->key);
value.Format(_T("%s"),m->value);
meta.AppendFormat(_T("%s\t:%s\r\n"),key,value);
#endif
}
//EditControl换行用\n不行，需要使用\r\n
//除了要用\r\n外，还要都CEdit 的属性进行设置：
//Auto HScroll 设置为 False
//MultiLine 设置为 True
//dlg->m_metadata.SetWindowText(author+"\r\n"+copyright+"\r\n"+description);
dlg->m_metadata.SetWindowText(meta);
//--------------------------------------------------------------------
return 0;
}
//每一帧设置一次
//有一些全局变量
//设置图表
int ve_param_packet(VideoState *is,AVPacket *packet){
//--------------------------------------------------------------------
AVFormatContext *pFormatCtx = is->ic;
int video_stream=is->video_stream;
int audio_stream=is->audio_stream;
AVCodecContext *pCodecCtx = pFormatCtx->streams[video_stream]->codec;
//避免数据太多，超过一定量之后，就会清零--------------------------
if(packet_index>=MAX_PACKET_NUM){
dlg->SystemClear();
}
//自增-----------------------------------------------
packet_index++;
return 0;
}
//视频帧参数提取
int ve_param_vframe(VideoState *is,AVFrame *pFrame,AVPacket *packet){
//--------------------------------------------------------------------
CString key_frame,pict_type,reference,f_index,pts,codednum;
AVFormatContext *pFormatCtx = is->ic;
int video_stream=is->video_stream;
AVCodecContext *pCodecCtx = pFormatCtx->streams[video_stream]->codec;
//避免数据太多，超过一定量之后，就会清零--------------------------
if(vframe_index>=MAX_FRAME_NUM){
dlg->SystemClear();
}
//
//------------------------------
f_index.Format(_T("%d"),vframe_index);
//获取当前记录条数
int nIndex=dlg->videodecode->m_decodeframe_v.GetItemCount();
//“行”数据结构
LV_ITEM lvitem;
lvitem.mask=LVIF_TEXT;
lvitem.iItem=nIndex;
lvitem.iSubItem=0;
//注：vframe_index不可以直接赋值！
//务必使用f_index执行Format!再赋值！
lvitem.pszText=f_index.GetBuffer();
//------------------------
switch(pFrame->key_frame){
case 0:
key_frame.Format(_T("No"));break;
case 1:
key_frame.Format(_T("Yes"));break;
default:
key_frame.Format(_T("Unknown"));
}
switch(pFrame->pict_type){
case 0:
pict_type.Format(_T("Unknown"));break;
case 1:
pict_type.Format(_T("I"));break;
case 2:
pict_type.Format(_T("P"));break;
case 3:
pict_type.Format(_T("B"));break;
case 4:
pict_type.Format(_T("S"));break;
case 5:
pict_type.Format(_T("SI"));break;
case 6:
pict_type.Format(_T("SP"));break;
case 7:
pict_type.Format(_T("BI"));break;
default:
pict_type.Format(_T("Unknown"));
}
reference.Format(_T("%d"),pFrame->reference);
pts.Format(_T("%d"),pFrame->pkt_pts);
codednum.Format(_T("%d"),pFrame->coded_picture_number);
//插入表格------------------------
dlg->videodecode->m_decodeframe_v.InsertItem(&lvitem);
dlg->videodecode->m_decodeframe_v.SetItemText(nIndex,1,pict_type);
dlg->videodecode->m_decodeframe_v.SetItemText(nIndex,2,key_frame);
dlg->videodecode->m_decodeframe_v.SetItemText(nIndex,3,codednum);
dlg->videodecode->m_decodeframe_v.SetItemText(nIndex,4,pts);
dlg->videodecode->m_decodeframe_v.SendMessage(WM_VSCROLL, SB_BOTTOM, NULL);
//准备画！
//视频帧解码单帧分析-----------------
dlg->dfanalysis->qscale_table=(char *)pFrame->qscale_table;
//QP类型
dlg->dfanalysis->qscale_type=pFrame->qscale_type;
//注意：stride要比每行的宏块数+1
dlg->dfanalysis->mb_stride = pCodecCtx->width/16+1;
//宏块总数，最后一行不足一个的按一个算
dlg->dfanalysis->mb_sum = ((pCodecCtx->height+15)>>4)*(pCodecCtx->width/16+1);
dlg->dfanalysis->mb_type = (int *)pFrame->mb_type;
//运动矢量
dlg->dfanalysis->motion_val0 = (short (*)[2])pFrame->motion_val[0];
dlg->dfanalysis->motion_val1 = (short (*)[2])pFrame->motion_val[1];
dlg->dfanalysis->motion_subsample_log2 = pFrame->motion_subsample_log2;
dlg->dfanalysis->mb_width =(pCodecCtx->width+15)>>4;
dlg->dfanalysis->codec_id=pCodecCtx->codec_id;
//--------------------
dlg->dfanalysis->ref_index0 = (char *)pFrame->ref_index[0];
dlg->dfanalysis->ref_index1 = (char *)pFrame->ref_index[1];
//其他相关的参数
dlg->dfanalysis->frame_index = vframe_index;
dlg->dfanalysis->pict_type = pFrame->pict_type;
dlg->dfanalysis->pts = pFrame->pkt_pts;
dlg->dfanalysis->width = pFrame->width;
dlg->dfanalysis->height = pFrame->height;
//数据
dlg->dfanalysis->data[0]=pFrame->data[0];
dlg->dfanalysis->data[1]=pFrame->data[1];
dlg->dfanalysis->data[2]=pFrame->data[2];
dlg->dfanalysis->linesize[0]=pFrame->linesize[0];
dlg->dfanalysis->linesize[1]=pFrame->linesize[1];
dlg->dfanalysis->linesize[2]=pFrame->linesize[2];
dlg->dfanalysis->pix_fmt=pCodecCtx->pix_fmt;
//当解码音频和图片的时候此值为空
if(pFrame->owner!=NULL){
dlg->dfanalysis->refs = pFrame->owner->refs;
}
//精确的时间，以微秒为单位
//PTS*time_base=真正的时间
//注意：time_base指的是AVStream里面的，其他地方也有，但是不能用于计算时间
dlg->dfanalysis->ptime =((float)pFrame->pkt_pts)*((float)pFormatCtx->streams[video_stream]->time_base.num)/((float)pFormatCtx->streams[video_stream]->time_base.den);
//视频帧解码分析-----------------------
//是否开启？
if(dlg->dfanalysis->m_dfanalysisauto.GetCheck()==1){
//获取帧间隔
int interframe=dlg->dfanalysis->m_dfanalysisautointerframenum;
if(vframe_index%interframe==0){
dlg->dfanalysis->DrawPic();
}
}
vframe_index++;
return 0;
}
//音频帧参数提取
int ve_param_aframe(VideoState *is,AVFrame *pFrame,AVPacket *packet){
//--------------------------------------------------------------------
AVFormatContext *pFormatCtx = is->ic;
int audio_stream=is->audio_stream;
AVCodecContext *pCodecCtx = pFormatCtx->streams[audio_stream]->codec;
//避免数据太多，超过一定量之后，就会清零--------------------------
if(aframe_index>=MAX_FRAME_NUM){
dlg->SystemClear();
}
//------------------------------
CString f_index,packet_size,dts,pts;
//---------------
f_index.Format(_T("%d"),aframe_index);
//获取当前记录条数
int nIndex=dlg->audiodecode->m_decodeframe_a.GetItemCount();
//“行”数据结构
LV_ITEM lvitem;
lvitem.mask=LVIF_TEXT;
lvitem.iItem=nIndex;
lvitem.iSubItem=0;
//注：frame_index不可以直接赋值！
//务必使用f_index执行Format!再赋值！
lvitem.pszText=f_index.GetBuffer();
//------------------------
packet_size.Format(_T("%d"),packet->size);
pts.Format(_T("%d"),packet->pts);
dts.Format(_T("%d"),packet->dts);
//---------------
dlg->audiodecode->m_decodeframe_a.InsertItem(&lvitem);
dlg->audiodecode->m_decodeframe_a.SetItemText(nIndex,1,packet_size);
dlg->audiodecode->m_decodeframe_a.SetItemText(nIndex,2,pts);
dlg->audiodecode->m_decodeframe_a.SetItemText(nIndex,3,dts);
dlg->audiodecode->m_decodeframe_a.SendMessage(WM_VSCROLL, SB_BOTTOM, NULL);
aframe_index++;
return 0;
}
//--------------------------------------------------
static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
//往队列里添加Packet(两层)?
static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
{
AVPacketList *pkt1;
if (q->abort_request)
return -1;
//PacketList将Packet组成一个链表
//每个PacketList只有一个Packet
pkt1 = (AVPacketList*)av_malloc(sizeof(AVPacketList));
if (!pkt1)
return -1;
pkt1->pkt = *pkt;
pkt1->next = NULL;
if (!q->last_pkt)
//第一个
q->first_pkt = pkt1;
else
//其他情况
q->last_pkt->next = pkt1;
q->last_pkt = pkt1;
q->nb_packets++;
q->size += pkt1->pkt.size + sizeof(*pkt1);
/* XXX: should duplicate packet data in DV case */
SDL_CondSignal(q->cond);
return 0;
}
//往队列里添加Packet
static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
{
int ret;
/* duplicate the packet */
if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
return -1;
SDL_LockMutex(q->mutex);
//往队列里添加Packet(两层)?
ret = packet_queue_put_private(q, pkt);
SDL_UnlockMutex(q->mutex);
if (pkt != &flush_pkt && ret < 0)
av_free_packet(pkt);
return ret;
}
/* packet queue handling */
static void packet_queue_init(PacketQueue *q)
{
memset(q, 0, sizeof(PacketQueue));
q->mutex = SDL_CreateMutex();
q->cond = SDL_CreateCond();
q->abort_request = 1;
}
static void packet_queue_flush(PacketQueue *q)
{
AVPacketList *pkt, *pkt1;
SDL_LockMutex(q->mutex);
for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
pkt1 = pkt->next;
av_free_packet(&pkt->pkt);
av_freep(&pkt);
}
q->last_pkt = NULL;
q->first_pkt = NULL;
q->nb_packets = 0;
q->size = 0;
SDL_UnlockMutex(q->mutex);
}
static void packet_queue_destroy(PacketQueue *q)
{
packet_queue_flush(q);
SDL_DestroyMutex(q->mutex);
SDL_DestroyCond(q->cond);
}
static void packet_queue_abort(PacketQueue *q)
{
SDL_LockMutex(q->mutex);
q->abort_request = 1;
SDL_CondSignal(q->cond);
SDL_UnlockMutex(q->mutex);
}
static void packet_queue_start(PacketQueue *q)
{
SDL_LockMutex(q->mutex);
q->abort_request = 0;
packet_queue_put_private(q, &flush_pkt);
SDL_UnlockMutex(q->mutex);
}
/* return < 0 if aborted, 0 if no packet and > 0 if packet. */
static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
{
AVPacketList *pkt1;
int ret;
SDL_LockMutex(q->mutex);
for (;;) {
if (q->abort_request) {
ret = -1;
break;
}
pkt1 = q->first_pkt;
if (pkt1) {
q->first_pkt = pkt1->next;
if (!q->first_pkt)
q->last_pkt = NULL;
q->nb_packets--;
q->size -= pkt1->pkt.size + sizeof(*pkt1);
*pkt = pkt1->pkt;
av_free(pkt1);
ret = 1;
break;
} else if (!block) {
ret = 0;
break;
} else {
SDL_CondWait(q->cond, q->mutex);
}
}
SDL_UnlockMutex(q->mutex);
return ret;
}
static inline void fill_rectangle(SDL_Surface *screen,
int x, int y, int w, int h, int color)
{
SDL_Rect rect;
rect.x = x;
rect.y = y;
rect.w = w;
rect.h = h;
SDL_FillRect(screen, &rect, color);
}
#define ALPHA_BLEND(a, oldp, newp, s)\
((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
#define RGBA_IN(r, g, b, a, s)\
{\
unsigned int v = ((const uint32_t *)(s))[0];\
a = (v >> 24) & 0xff;\
r = (v >> 16) & 0xff;\
g = (v >> 8) & 0xff;\
b = v & 0xff;\
}
#define YUVA_IN(y, u, v, a, s, pal)\
{\
unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
a = (val >> 24) & 0xff;\
y = (val >> 16) & 0xff;\
u = (val >> 8) & 0xff;\
v = val & 0xff;\
}
#define YUVA_OUT(d, y, u, v, a)\
{\
((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
}
#define BPP 1
static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
{
int wrap, wrap3, width2, skip2;
int y, u, v, a, u1, v1, a1, w, h;
uint8_t *lum, *cb, *cr;
const uint8_t *p;
const uint32_t *pal;
int dstx, dsty, dstw, dsth;
dstw = av_clip(rect->w, 0, imgw);
dsth = av_clip(rect->h, 0, imgh);
dstx = av_clip(rect->x, 0, imgw - dstw);
dsty = av_clip(rect->y, 0, imgh - dsth);
lum = dst->data[0] + dsty * dst->linesize[0];
cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
skip2 = dstx >> 1;
wrap = dst->linesize[0];
wrap3 = rect->pict.linesize[0];
p = rect->pict.data[0];
pal = (const uint32_t *)rect->pict.data[1]; /* Now in YCrCb! */
if (dsty & 1) {
lum += dstx;
cb += skip2;
cr += skip2;
if (dstx & 1) {
YUVA_IN(y, u, v, a, p, pal);
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
cb++;
cr++;
lum++;
p += BPP;
}
for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
YUVA_IN(y, u, v, a, p, pal);
u1 = u;
v1 = v;
a1 = a;
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
YUVA_IN(y, u, v, a, p + BPP, pal);
u1 += u;
v1 += v;
a1 += a;
lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
cb++;
cr++;
p += 2 * BPP;
lum += 2;
}
if (w) {
YUVA_IN(y, u, v, a, p, pal);
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
p++;
lum++;
}
p += wrap3 - dstw * BPP;
lum += wrap - dstw - dstx;
cb += dst->linesize[1] - width2 - skip2;
cr += dst->linesize[2] - width2 - skip2;
}
for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
lum += dstx;
cb += skip2;
cr += skip2;
if (dstx & 1) {
YUVA_IN(y, u, v, a, p, pal);
u1 = u;
v1 = v;
a1 = a;
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
p += wrap3;
lum += wrap;
YUVA_IN(y, u, v, a, p, pal);
u1 += u;
v1 += v;
a1 += a;
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
cb++;
cr++;
p += -wrap3 + BPP;
lum += -wrap + 1;
}
for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
YUVA_IN(y, u, v, a, p, pal);
u1 = u;
v1 = v;
a1 = a;
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
YUVA_IN(y, u, v, a, p + BPP, pal);
u1 += u;
v1 += v;
a1 += a;
lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
p += wrap3;
lum += wrap;
YUVA_IN(y, u, v, a, p, pal);
u1 += u;
v1 += v;
a1 += a;
lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
YUVA_IN(y, u, v, a, p + BPP, pal);
u1 += u;
v1 += v;
a1 += a;
lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
cb++;
cr++;