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fteqw/plugins/avplug/avdecode.c

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#include "../plugin.h"
#include "../engine.h"
static plugfsfuncs_t *filefuncs;
static plugaudiofuncs_t *audiofuncs;
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "libavutil/imgutils.h"
#define TARGET_FFMPEG (LIBAVFORMAT_VERSION_MICRO >= 100)
#define HAVE_DECOUPLED_API (LIBAVCODEC_VERSION_MAJOR>57 || (LIBAVCODEC_VERSION_MAJOR==57&&LIBAVCODEC_VERSION_MINOR>=36))
//between av 52.31 and 54.35, lots of constants etc got renamed to gain an extra AV_ prefix.
/*
#define AV_PIX_FMT_BGRA PIX_FMT_BGRA
#define AVMEDIA_TYPE_AUDIO CODEC_TYPE_AUDIO
#define AVMEDIA_TYPE_VIDEO CODEC_TYPE_VIDEO
#define AV_PIX_FMT_BGRA PIX_FMT_BGRA
#define AV_SAMPLE_FMT_U8 SAMPLE_FMT_U8
#define AV_SAMPLE_FMT_S16 SAMPLE_FMT_S16
#define AV_SAMPLE_FMT_FLT SAMPLE_FMT_FLT
#define AVIOContext ByteIOContext
#define avio_alloc_context av_alloc_put_byte
*/
#define DECODERNAME "ffmpeg"
/*should probably try threading this, though I suppose it should be the engine doing that.*/
/*timing is based upon the start time. this means overflow issues with rtsp etc*/
struct decctx
{
unsigned int width, height;
vfsfile_t *file;
int64_t fileofs;
int64_t filelen;
AVFormatContext *pFormatCtx;
int audioStream;
AVCodecContext *pACodecCtx;
AVFrame *pAFrame;
int videoStream;
AVCodecContext *pVCodecCtx;
AVFrame *pVFrame;
int64_t num, denum;
int64_t lasttime;
uint8_t *rgb_data;
int rgb_linesize;
struct SwsContext *pScaleCtx;
};
static qboolean AVDec_SetSize (void *vctx, int width, int height)
{
struct decctx *ctx = (struct decctx*)vctx;
uint8_t *rgb_data[4]; //av_image_alloc requires at least 4 entries for certain pix formats (libav (but not ffmpeg) zero-fills, so this is important).
int rgb_linesize[4];
//colourspace conversions will be fastest if we
// if (width > ctx->pCodecCtx->width)
width = ctx->pVCodecCtx->width;
// if (height > ctx->pCodecCtx->height)
height = ctx->pVCodecCtx->height;
//is this a no-op?
if (width == ctx->width && height == ctx->height && ctx->pScaleCtx)
return true;
if (av_image_alloc(rgb_data, rgb_linesize, width, height, AV_PIX_FMT_BGRA, 1) >= 0)
{
//update the scale context as required
//clear the old stuff out
av_free(ctx->rgb_data);
ctx->width = width;
ctx->height = height;
ctx->rgb_data = rgb_data[0];
ctx->rgb_linesize = rgb_linesize[0];
return qtrue;
}
return qfalse; //unsupported
}
static int AVIO_Read(void *opaque, uint8_t *buf, int buf_size)
{
struct decctx *ctx = opaque;
int ammount;
ammount = VFS_READ(ctx->file, buf, buf_size);
if (ammount > 0)
ctx->fileofs += ammount;
return ammount;
}
static int64_t AVIO_Seek(void *opaque, int64_t offset, int whence)
{
struct decctx *ctx = opaque;
whence &= ~AVSEEK_FORCE;
switch(whence)
{
default:
return -1;
case SEEK_SET:
ctx->fileofs = offset;
break;
case SEEK_CUR:
ctx->fileofs += offset;
break;
case SEEK_END:
ctx->fileofs = ctx->filelen + offset;
break;
case AVSEEK_SIZE:
return ctx->filelen;
}
VFS_SEEK(ctx->file, ctx->fileofs);
return ctx->fileofs;
}
static void AVDec_Destroy(void *vctx)
{
struct decctx *ctx = (struct decctx*)vctx;
// Free the video stuff
av_free(ctx->rgb_data);
if (ctx->pVCodecCtx)
avcodec_close(ctx->pVCodecCtx);
av_free(ctx->pVFrame);
// Free the audio decoder
if (ctx->pACodecCtx)
avcodec_close(ctx->pACodecCtx);
av_free(ctx->pAFrame);
// Close the video file
avformat_close_input(&ctx->pFormatCtx);
if (ctx->file)
VFS_CLOSE(ctx->file);
free(ctx);
}
static void *AVDec_Create(const char *medianame)
{
struct decctx *ctx;
unsigned int i;
AVCodec *pCodec;
qboolean useioctx = false;
/*always respond to av: media prefixes*/
if (!strncmp(medianame, "av:", 3) || !strncmp(medianame, "ff:", 3))
{
medianame = medianame + 3;
useioctx = true;
}
else if (!strncmp(medianame, "avs:", 4) || !strncmp(medianame, "ffs:", 4))
{
medianame = medianame + 4;
//let avformat do its own avio context stuff
}
else if (strchr(medianame, ':')) //block other types of url/prefix.
return NULL;
else //if (!strcasecmp(extension, ".roq") || !strcasecmp(extension, ".roq"))
return NULL; //roq+cin should be played back via the engine instead.
ctx = malloc(sizeof(*ctx));
memset(ctx, 0, sizeof(*ctx));
ctx->lasttime = -1;
ctx->file = NULL;
if (useioctx)
{
// Create internal Buffer for FFmpeg:
const int iBufSize = 32 * 1024;
char *pBuffer = av_malloc(iBufSize);
AVIOContext *ioctx;
ctx->file = filefuncs->OpenVFS(medianame, "rb", FS_GAME);
if (!ctx->file)
{
Con_Printf("Unable to open %s\n", medianame);
free(ctx);
av_free(pBuffer);
return NULL;
}
ctx->filelen = VFS_GETLEN(ctx->file);
ioctx = avio_alloc_context(pBuffer, iBufSize, 0, ctx, AVIO_Read, 0, AVIO_Seek);
ctx->pFormatCtx = avformat_alloc_context();
ctx->pFormatCtx->pb = ioctx;
}
/*
small how-to note for if I ever try to add support for voice-and-video rtp decoding.
this stuff is presumably needed to handle ICE+stun+ports etc.
I prolly need to hack around with adding rtcp too. :s
rtsp: Add support for depacketizing RTP data via custom IO
To use this, set sdpflags=custom_io to the sdp demuxer. During
the avformat_open_input call, the SDP is read from the AVFormatContext
AVIOContext (ctx->pb) - after the avformat_open_input call,
during the av_read_frame() calls, the same ctx->pb is used for reading
packets (and sending back RTCP RR packets).
Normally, one would use this with a read-only AVIOContext for the
SDP during the avformat_open_input call, then close that one and
replace it with a read-write one for the packets after the
avformat_open_input call has returned.
This allows using the RTP depacketizers as "pure" demuxers, without
having them tied to the libavformat network IO.
*/
// Open video file
if(avformat_open_input(&ctx->pFormatCtx, medianame, NULL, NULL)==0)
{
// Retrieve stream information
if(avformat_find_stream_info(ctx->pFormatCtx, NULL)>=0)
{
ctx->audioStream=-1;
for(i=0; i<ctx->pFormatCtx->nb_streams && ctx->audioStream==-1; i++)
{
#if LIBAVFORMAT_VERSION_MAJOR >= 57
if(ctx->pFormatCtx->streams[i]->codecpar->codec_type==AVMEDIA_TYPE_AUDIO)
#else
if(ctx->pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO)
#endif
ctx->audioStream=i;
}
if(ctx->audioStream!=-1)
{
#if LIBAVFORMAT_VERSION_MAJOR >= 57
pCodec=avcodec_find_decoder(ctx->pFormatCtx->streams[ctx->audioStream]->codecpar->codec_id);
ctx->pACodecCtx = avcodec_alloc_context3(pCodec);
if (avcodec_parameters_to_context(ctx->pACodecCtx, ctx->pFormatCtx->streams[ctx->audioStream]->codecpar) < 0)
{
avcodec_free_context(&ctx->pACodecCtx);
pCodec = NULL;
}
#else
ctx->pACodecCtx=ctx->pFormatCtx->streams[ctx->audioStream]->codec;
pCodec=avcodec_find_decoder(ctx->pACodecCtx->codec_id);
#endif
ctx->pAFrame=av_frame_alloc();
if(pCodec!=NULL && ctx->pAFrame && avcodec_open2(ctx->pACodecCtx, pCodec, NULL) >= 0)
{
}
else
ctx->audioStream = -1;
}
ctx->videoStream=-1;
for(i=0; i<ctx->pFormatCtx->nb_streams && ctx->videoStream==-1; i++)
{
#if LIBAVFORMAT_VERSION_MAJOR >= 57
if(ctx->pFormatCtx->streams[i]->codecpar->codec_type==AVMEDIA_TYPE_VIDEO)
#else
if(ctx->pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
#endif
ctx->videoStream=i;
}
if(ctx->videoStream!=-1)
{
#if LIBAVFORMAT_VERSION_MAJOR >= 57
pCodec=avcodec_find_decoder(ctx->pFormatCtx->streams[ctx->videoStream]->codecpar->codec_id);
ctx->pVCodecCtx = avcodec_alloc_context3(pCodec);
if (avcodec_parameters_to_context(ctx->pVCodecCtx, ctx->pFormatCtx->streams[ctx->videoStream]->codecpar) < 0)
{
avcodec_free_context(&ctx->pVCodecCtx);
pCodec = NULL;
}
#else
ctx->pVCodecCtx=ctx->pFormatCtx->streams[ctx->videoStream]->codec;
pCodec=avcodec_find_decoder(ctx->pVCodecCtx->codec_id);
#endif
ctx->num = ctx->pFormatCtx->streams[ctx->videoStream]->time_base.num;
ctx->denum = ctx->pFormatCtx->streams[ctx->videoStream]->time_base.den;
// Open codec
if(pCodec!=NULL && avcodec_open2(ctx->pVCodecCtx, pCodec, NULL) >= 0)
{
// Allocate video frame
ctx->pVFrame=av_frame_alloc();
if(ctx->pVFrame!=NULL)
{
if (AVDec_SetSize(ctx, ctx->pVCodecCtx->width, ctx->pVCodecCtx->height))
{
return ctx;
}
}
}
}
}
}
AVDec_Destroy(ctx);
return NULL;
}
static qboolean VARGS AVDec_DisplayFrame(void *vctx, qboolean nosound, qboolean forcevideo, double mediatime, void (QDECL *uploadtexture)(void *ectx, uploadfmt_t fmt, int width, int height, void *data, void *palette), void *ectx)
{
struct decctx *ctx = (struct decctx*)vctx;
AVPacket packet;
#if HAVE_DECOUPLED_API
#else
int frameFinished;
#endif
qboolean repainted = false;
int64_t curtime;
curtime = (mediatime * ctx->denum) / ctx->num;
nosound |= !audiofuncs;
while (1)
{
if (ctx->lasttime > curtime)
break;
// We're ahead of the previous frame. try and read the next.
if (av_read_frame(ctx->pFormatCtx, &packet) < 0)
{
if (repainted)
break;
return false;
}
#if HAVE_DECOUPLED_API
if(packet.stream_index==ctx->videoStream)
{
avcodec_send_packet(ctx->pVCodecCtx, &packet);
while(0==avcodec_receive_frame(ctx->pVCodecCtx, ctx->pVFrame))
{
//rescale+convert it to what we're rendering (no more yuv)
ctx->pScaleCtx = sws_getCachedContext(ctx->pScaleCtx, ctx->pVCodecCtx->width, ctx->pVCodecCtx->height, ctx->pVCodecCtx->pix_fmt, ctx->width, ctx->height, AV_PIX_FMT_BGRA, SWS_POINT, 0, 0, 0);
sws_scale(ctx->pScaleCtx, (void*)ctx->pVFrame->data, ctx->pVFrame->linesize, 0, ctx->pVCodecCtx->height, &ctx->rgb_data, &ctx->rgb_linesize);
ctx->lasttime = ctx->pVFrame->best_effort_timestamp;
repainted = true;
}
}
else if(packet.stream_index==ctx->audioStream && !nosound)
{
avcodec_send_packet(ctx->pACodecCtx, &packet);
while(0==avcodec_receive_frame(ctx->pACodecCtx, ctx->pAFrame))
{
int width = 2;
int channels = ctx->pACodecCtx->channels;
unsigned int auddatasize = av_samples_get_buffer_size(NULL, ctx->pACodecCtx->channels, ctx->pAFrame->nb_samples, ctx->pACodecCtx->sample_fmt, 1);
void *auddata = ctx->pAFrame->data[0];
switch(ctx->pACodecCtx->sample_fmt)
{
default:
auddatasize = 0;
break;
case AV_SAMPLE_FMT_U8P:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_U8:
width = 1;
break;
case AV_SAMPLE_FMT_S16P:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_S16:
width = 2;
break;
case AV_SAMPLE_FMT_FLTP:
if (channels == 2)
{
#ifdef MIXER_F32
float *l = (float*)ctx->pAFrame->data[0], *r = (float*)ctx->pAFrame->data[1], *t;
unsigned int i;
unsigned int frames = ctx->pAFrame->nb_samples;
width = sizeof(*t);
auddatasize = frames*width*channels;
t = malloc(auddatasize);
for (i = 0; i < frames; i++)
{
t[2*i+0] = l[i];
t[2*i+1] = r[i];
}
audiofuncs->RawAudio(-1, t, ctx->pACodecCtx->sample_rate, auddatasize/(channels*width), channels, width, 1);
free(t);
continue;
#else
//note that we can only reformat in place because we are NOT outputting floats.
float *in[2] = {(float*)ctx->pAFrame->data[0],(float*)ctx->pAFrame->data[1]};
signed short *out = (void*)auddata;
int v;
unsigned int i, c;
unsigned int frames = ctx->pAFrame->nb_samples;
for (i = 0; i < frames; i++)
{
for (c = 0; c < 2; c++)
{
v = (short)(in[c][i]*32767);
if (v < -32767)
v = -32767;
else if (v > 32767)
v = 32767;
*out++ = v;
}
}
width = sizeof(*out);
auddatasize = frames*width*channels;
break;
#endif
}
auddatasize /= channels;
channels = 1;
//fallthrough, using just the first channel as mono
case AV_SAMPLE_FMT_FLT:
#ifdef MIXER_F32
width = 4;
#else
{
float *in = (void*)auddata;
signed short *out = (void*)auddata;
int v;
unsigned int i;
for (i = 0; i < auddatasize/sizeof(*in); i++)
{
v = (short)(in[i]*32767);
if (v < -32767)
v = -32767;
else if (v > 32767)
v = 32767;
out[i] = v;
}
auddatasize/=2;
width = 2;
}
#endif
break;
case AV_SAMPLE_FMT_DBLP:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_DBL:
{
double *in = (double*)auddata;
signed short *out = (void*)auddata;
int v;
unsigned int i;
for (i = 0; i < auddatasize/sizeof(*in); i++)
{
v = (short)(in[i]*32767);
if (v < -32767)
v = -32767;
else if (v > 32767)
v = 32767;
out[i] = v;
}
auddatasize/=4;
width = 2;
}
break;
}
audiofuncs->RawAudio(-1, auddata, ctx->pACodecCtx->sample_rate, auddatasize/(channels*width), channels, width, 1);
}
}
av_packet_unref(&packet);
#else
// Is this a packet from the video stream?
if(packet.stream_index==ctx->videoStream)
{
// Decode video frame
avcodec_decode_video2(ctx->pVCodecCtx, ctx->pVFrame, &frameFinished, &packet);
// Did we get a video frame?
if(frameFinished)
{
ctx->pScaleCtx = sws_getCachedContext(ctx->pScaleCtx, ctx->pVCodecCtx->width, ctx->pVCodecCtx->height, ctx->pVCodecCtx->pix_fmt, ctx->width, ctx->height, AV_PIX_FMT_BGRA, SWS_POINT, 0, 0, 0);
// Convert the image from its native format to RGB
sws_scale(ctx->pScaleCtx, (void*)ctx->pVFrame->data, ctx->pVFrame->linesize, 0, ctx->pVCodecCtx->height, &ctx->rgb_data, &ctx->rgb_linesize);
repainted = true;
}
#if TARGET_FFMPEG
ctx->lasttime = av_frame_get_best_effort_timestamp(ctx->pVFrame);
#else
if(frameFinished)
{
if (ctx->pVFrame->pkt_pts != AV_NOPTS_VALUE)
ctx->lasttime = ctx->pVFrame->pkt_pts;
else
ctx->lasttime = ctx->pVFrame->pkt_dts;
}
#endif
}
else if(packet.stream_index==ctx->audioStream && !nosound)
{
int okay;
int len;
void *odata = packet.data;
while (packet.size > 0)
{
okay = false;
len = avcodec_decode_audio4(ctx->pACodecCtx, ctx->pAFrame, &okay, &packet);
if (len < 0)
break;
packet.size -= len;
packet.data += len;
if (okay)
{
int width = 2;
int channels = ctx->pACodecCtx->channels;
unsigned int auddatasize = av_samples_get_buffer_size(NULL, ctx->pACodecCtx->channels, ctx->pAFrame->nb_samples, ctx->pACodecCtx->sample_fmt, 1);
void *auddata = ctx->pAFrame->data[0];
switch(ctx->pACodecCtx->sample_fmt)
{
default:
auddatasize = 0;
break;
case AV_SAMPLE_FMT_U8P:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_U8:
width = 1;
break;
case AV_SAMPLE_FMT_S16P:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_S16:
width = 2;
break;
case AV_SAMPLE_FMT_FLTP:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_FLT:
//FIXME: support float audio internally.
{
float *in = (void*)auddata;
signed short *out = (void*)auddata;
int v;
unsigned int i;
for (i = 0; i < auddatasize/sizeof(*in); i++)
{
v = (short)(in[i]*32767);
if (v < -32767)
v = -32767;
else if (v > 32767)
v = 32767;
out[i] = v;
}
auddatasize/=2;
width = 2;
}
case AV_SAMPLE_FMT_DBLP:
auddatasize /= channels;
channels = 1;
case AV_SAMPLE_FMT_DBL:
{
double *in = (double*)auddata;
signed short *out = (void*)auddata;
int v;
unsigned int i;
for (i = 0; i < auddatasize/sizeof(*in); i++)
{
v = (short)(in[i]*32767);
if (v < -32767)
v = -32767;
else if (v > 32767)
v = 32767;
out[i] = v;
}
auddatasize/=4;
width = 2;
}
break;
}
audiofuncs->RawAudio(-1, auddata, ctx->pACodecCtx->sample_rate, auddatasize/(channels*width), channels, width, 1);
}
}
packet.data = odata;
}
// Free the packet that was allocated by av_read_frame
av_packet_unref(&packet);
#endif
}
if (forcevideo || repainted)
uploadtexture(ectx, TF_BGRA32, ctx->width, ctx->height, ctx->rgb_data, NULL);
return true;
}
static void AVDec_GetSize (void *vctx, int *width, int *height)
{
struct decctx *ctx = (struct decctx*)vctx;
*width = ctx->width;
*height = ctx->height;
}
/*static void AVDec_CursorMove (void *vctx, float posx, float posy)
{
//its a video, dumbass
}
static void AVDec_Key (void *vctx, int code, int unicode, int isup)
{
//its a video, dumbass
}
static void AVDec_ChangeStream(void *vctx, char *newstream)
{
}
*/
static void AVDec_Rewind(void *vctx)
{
struct decctx *ctx = (struct decctx*)vctx;
if (ctx->lasttime != -1)
{
av_seek_frame(ctx->pFormatCtx, -1, 0, AVSEEK_FLAG_FRAME|AVSEEK_FLAG_BACKWARD);
avcodec_flush_buffers(ctx->pVCodecCtx);
}
ctx->lasttime = -1;
}
/*
//avcodec has no way to shut down properly.
static qboolean AVDec_Shutdown(void)
{
return 0;
}
*/
static media_decoder_funcs_t decoderfuncs =
{
sizeof(media_decoder_funcs_t),
DECODERNAME,
AVDec_Create,
AVDec_DisplayFrame,
AVDec_Destroy,
AVDec_Rewind,
NULL,//AVDec_CursorMove,
NULL,//AVDec_Key,
NULL,//AVDec_SetSize,
AVDec_GetSize,
NULL,//AVDec_ChangeStream
};
qboolean AVDec_Init(void)
{
filefuncs = plugfuncs->GetEngineInterface(plugfsfuncs_name, sizeof(*filefuncs));
audiofuncs = plugfuncs->GetEngineInterface(plugaudiofuncs_name, sizeof(*audiofuncs));
if (!filefuncs ||
!plugfuncs->ExportInterface("Media_VideoDecoder", &decoderfuncs, sizeof(decoderfuncs)))
{
Con_Printf(DECODERNAME": Engine doesn't support media decoder plugins\n");
return false;
}
return true;
}
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