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mpv/libmpdemux/demux_avs.c

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/*
* Demuxer for avisynth
* Copyright (c) 2005 Gianluigi Tiesi <sherpya@netfarm.it>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "wine/windef.h"
#ifdef WIN32_LOADER
#include "ldt_keeper.h"
#endif
#include "demux_avs.h"
#define MAX_AVS_SIZE 16 * 1024 /* 16k should be enough */
#undef ENABLE_AUDIO
HMODULE WINAPI LoadLibraryA(LPCSTR);
FARPROC WINAPI GetProcAddress(HMODULE,LPCSTR);
int WINAPI FreeLibrary(HMODULE);
typedef WINAPI AVS_ScriptEnvironment* (*imp_avs_create_script_environment)(int version);
typedef WINAPI AVS_Value (*imp_avs_invoke)(AVS_ScriptEnvironment *, const char * name, AVS_Value args, const char** arg_names);
typedef WINAPI const AVS_VideoInfo *(*imp_avs_get_video_info)(AVS_Clip *);
typedef WINAPI AVS_Clip* (*imp_avs_take_clip)(AVS_Value, AVS_ScriptEnvironment *);
typedef WINAPI AVS_VideoFrame* (*imp_avs_get_frame)(AVS_Clip *, int n);
typedef WINAPI void (*imp_avs_release_video_frame)(AVS_VideoFrame *);
#ifdef ENABLE_AUDIO
//typedef WINAPI int (*imp_avs_get_audio)(AVS_Clip *, void * buf, uint64_t start, uint64_t count);
typedef WINAPI int (*imp_avs_get_audio)(AVS_ScriptEnvironment *, void * buf, uint64_t start, uint64_t count);
#endif
#define Q(string) # string
#define IMPORT_FUNC(x) \
AVS->x = ( imp_##x ) GetProcAddress(AVS->dll, Q(x)); \
if (!AVS->x) { mp_msg(MSGT_DEMUX,MSGL_V,"AVS: failed to load "Q(x)"()\n"); return 0; }
typedef struct tagAVS
{
AVS_ScriptEnvironment *avs_env;
AVS_Value handler;
AVS_Clip *clip;
const AVS_VideoInfo *video_info;
#ifdef WIN32_LOADER
ldt_fs_t* ldt_fs;
#endif
HMODULE dll;
int frameno;
int init;
imp_avs_create_script_environment avs_create_script_environment;
imp_avs_invoke avs_invoke;
imp_avs_get_video_info avs_get_video_info;
imp_avs_take_clip avs_take_clip;
imp_avs_get_frame avs_get_frame;
imp_avs_release_video_frame avs_release_video_frame;
#ifdef ENABLE_AUDIO
imp_avs_get_audio avs_get_audio;
#endif
} AVS_T;
AVS_T *initAVS(const char *filename)
{
AVS_T *AVS = (AVS_T *) malloc (sizeof(AVS_T));
AVS_Value arg0 = avs_new_value_string(filename);
AVS_Value args = avs_new_value_array(&arg0, 1);
memset(AVS, 0, sizeof(AVS_T));
#ifdef WIN32_LOADER
AVS->ldt_fs = Setup_LDT_Keeper();
#endif
AVS->dll = LoadLibraryA("avisynth.dll");
if(!AVS->dll)
{
mp_msg(MSGT_DEMUX ,MSGL_V, "AVS: failed to load avisynth.dll\n");
goto avs_err;
}
/* Dynamic import of needed stuff from avisynth.dll */
IMPORT_FUNC(avs_create_script_environment);
IMPORT_FUNC(avs_invoke);
IMPORT_FUNC(avs_get_video_info);
IMPORT_FUNC(avs_take_clip);
IMPORT_FUNC(avs_get_frame);
IMPORT_FUNC(avs_release_video_frame);
#ifdef ENABLE_AUDIO
IMPORT_FUNC(avs_get_audio);
#endif
AVS->avs_env = AVS->avs_create_script_environment(AVISYNTH_INTERFACE_VERSION);
if (!AVS->avs_env)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_create_script_environment failed\n");
goto avs_err;
}
AVS->handler = AVS->avs_invoke(AVS->avs_env, "Import", args, 0);
if (avs_is_error(AVS->handler))
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: Avisynth error: %s\n", avs_as_string(AVS->handler));
goto avs_err;
}
if (!avs_is_clip(AVS->handler))
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: Avisynth doesn't return a clip\n");
goto avs_err;
}
return AVS;
avs_err:
if (AVS->dll) FreeLibrary(AVS->dll);
#ifdef WIN32_LOADER
Restore_LDT_Keeper(AVS->ldt_fs);
#endif
free(AVS);
return NULL;
}
/* Implement RGB MODES ?? */
#if 0
static __inline int get_mmioFOURCC(const AVS_VideoInfo *v)
{
if (avs_is_rgb(v)) return mmioFOURCC(8, 'R', 'G', 'B');
if (avs_is_rgb24(v)) return mmioFOURCC(24, 'R', 'G', 'B');
if (avs_is_rgb32(v)) return mmioFOURCC(32, 'R', 'G', 'B');
if (avs_is_yv12(v)) return mmioFOURCC('Y', 'V', '1', '2');
if (avs_is_yuy(v)) return mmioFOURCC('Y', 'U', 'Y', ' ');
if (avs_is_yuy2(v)) return mmioFOURCC('Y', 'U', 'Y', '2');
return 0;
}
#endif
static int demux_avs_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
{
AVS_VideoFrame *curr_frame;
demux_packet_t *dp = NULL;
AVS_T *AVS = (AVS_T *) demuxer->priv;
demux_stream_t *d_video=demuxer->video;
sh_video_t *sh_video=d_video->sh;
#ifdef ENABLE_AUDIO
demux_stream_t *d_audio=demuxer->audio;
sh_audio_t *sh_audio=d_audio->sh;
#endif
if (AVS->video_info->num_frames < AVS->frameno) return 0; // EOF
curr_frame = AVS->avs_get_frame(AVS->clip, AVS->frameno);
if (!curr_frame)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: error getting frame -- EOF??\n");
return 0;
}
if (avs_has_video(AVS->video_info))
{
dp = new_demux_packet(curr_frame->vfb->data_size);
sh_video->num_frames_decoded++;
sh_video->num_frames++;
d_video->pts=AVS->frameno / sh_video->fps; // OSD
memcpy(dp->buffer, curr_frame->vfb->data + curr_frame->offset, curr_frame->vfb->data_size);
ds_add_packet(demuxer->video, dp);
}
#ifdef ENABLE_AUDIO
/* Audio */
if (avs_has_audio(AVS->video_info))
{
int l = sh_audio->wf->nAvgBytesPerSec;
dp = new_demux_packet(l);
if (AVS->avs_get_audio(AVS->avs_env, dp->buffer, AVS->frameno*sh_video->fps*l, l))
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_get_audio() failed\n");
return 0;
}
ds_add_packet(demuxer->audio, dp);
}
#endif
AVS->frameno++;
AVS->avs_release_video_frame(curr_frame);
return 1;
}
static demuxer_t* demux_open_avs(demuxer_t* demuxer)
{
sh_video_t *sh_video = NULL;
#ifdef ENABLE_AUDIO
sh_audio_t *sh_audio = NULL;
#endif
int found = 0;
AVS_T *AVS = (AVS_T *) demuxer->priv;
AVS->frameno = 0;
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: demux_open_avs()\n");
demuxer->seekable = 1;
AVS->clip = AVS->avs_take_clip(AVS->handler, AVS->avs_env);
if(!AVS->clip)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_take_clip() failed\n");
return NULL;
}
AVS->video_info = AVS->avs_get_video_info(AVS->clip);
if (!AVS->video_info)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_get_video_info() call failed\n");
return NULL;
}
if (!avs_is_yv12(AVS->video_info))
{
AVS->handler = AVS->avs_invoke(AVS->avs_env, "ConvertToYV12", avs_new_value_array(&AVS->handler, 1), 0);
if (avs_is_error(AVS->handler))
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: Cannot convert input video to YV12: %s\n", avs_as_string(AVS->handler));
return NULL;
}
AVS->clip = AVS->avs_take_clip(AVS->handler, AVS->avs_env);
if(!AVS->clip)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_take_clip() failed\n");
return NULL;
}
AVS->video_info = AVS->avs_get_video_info(AVS->clip);
if (!AVS->video_info)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_get_video_info() call failed\n");
return NULL;
}
}
// TODO check field-based ??
/* Video */
if (avs_has_video(AVS->video_info))
{
found = 1;
sh_video = new_sh_video(demuxer, 0);
demuxer->video->sh = sh_video;
sh_video->ds = demuxer->video;
sh_video->disp_w = AVS->video_info->width;
sh_video->disp_h = AVS->video_info->height;
//sh_video->format = get_mmioFOURCC(AVS->video_info);
sh_video->format = mmioFOURCC('Y', 'V', '1', '2');
sh_video->fps = (float) ((float) AVS->video_info->fps_numerator / (float) AVS->video_info->fps_denominator);
sh_video->frametime = 1.0 / sh_video->fps;
sh_video->bih = (BITMAPINFOHEADER*) malloc(sizeof(BITMAPINFOHEADER) + (256 * 4));
sh_video->bih->biCompression = sh_video->format;
sh_video->bih->biBitCount = avs_bits_per_pixel(AVS->video_info);
//sh_video->bih->biPlanes = 2;
sh_video->bih->biWidth = AVS->video_info->width;
sh_video->bih->biHeight = AVS->video_info->height;
sh_video->num_frames = 0;
sh_video->num_frames_decoded = 0;
}
#ifdef ENABLE_AUDIO
/* Audio */
if (avs_has_audio(AVS->video_info))
{
found = 1;
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: Clip has audio -> Channels = %d - Freq = %d\n", AVS->video_info->nchannels, AVS->video_info->audio_samples_per_second);
sh_audio = new_sh_audio(demuxer, 0);
demuxer->audio->sh = sh_audio;
sh_audio->ds = demuxer->audio;
sh_audio->wf = (WAVEFORMATEX*) malloc(sizeof(WAVEFORMATEX));
sh_audio->wf->wFormatTag = sh_audio->format = 0x1;
sh_audio->wf->nChannels = sh_audio->channels = AVS->video_info->nchannels;
sh_audio->wf->nSamplesPerSec = sh_audio->samplerate = AVS->video_info->audio_samples_per_second;
sh_audio->wf->nAvgBytesPerSec = AVS->video_info->audio_samples_per_second * 4;
sh_audio->wf->nBlockAlign = 4;
sh_audio->wf->wBitsPerSample = sh_audio->samplesize = 16; // AVS->video_info->sample_type ??
sh_audio->wf->cbSize = 0;
sh_audio->i_bps = sh_audio->wf->nAvgBytesPerSec;
sh_audio->o_bps = sh_audio->wf->nAvgBytesPerSec;
}
#endif
AVS->init = 1;
if (found)
return demuxer;
else
return NULL;
}
static int demux_avs_control(demuxer_t *demuxer, int cmd, void *arg)
{
demux_stream_t *d_video=demuxer->video;
sh_video_t *sh_video=d_video->sh;
AVS_T *AVS = (AVS_T *) demuxer->priv;
switch(cmd)
{
case DEMUXER_CTRL_GET_TIME_LENGTH:
{
if (!AVS->video_info->num_frames) return DEMUXER_CTRL_DONTKNOW;
*((double *)arg) = (double)AVS->video_info->num_frames / sh_video->fps;
return DEMUXER_CTRL_OK;
}
case DEMUXER_CTRL_GET_PERCENT_POS:
{
if (!AVS->video_info->num_frames) return DEMUXER_CTRL_DONTKNOW;
*((int *)arg) = (int) (AVS->frameno * 100 / AVS->video_info->num_frames);
return DEMUXER_CTRL_OK;
}
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
static void demux_close_avs(demuxer_t* demuxer)
{
AVS_T *AVS = (AVS_T *) demuxer->priv;
// TODO release_clip?
if (AVS)
{
if (AVS->dll)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: Unloading avisynth.dll\n");
FreeLibrary(AVS->dll);
}
#ifdef WIN32_LOADER
Restore_LDT_Keeper(AVS->ldt_fs);
#endif
free(AVS);
}
}
static void demux_seek_avs(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags)
{
demux_stream_t *d_video=demuxer->video;
sh_video_t *sh_video=d_video->sh;
AVS_T *AVS = (AVS_T *) demuxer->priv;
int video_pos=AVS->frameno;
//mp_msg(MSGT_DEMUX, MSGL_V, "AVS: seek rel_seek_secs = %f - flags = %x\n", rel_seek_secs, flags);
// seek absolute
if (flags&1) video_pos=0;
video_pos += (rel_seek_secs * sh_video->fps);
if (video_pos < 0) video_pos = 0;
if (video_pos > AVS->video_info->num_frames) video_pos = AVS->video_info->num_frames;
AVS->frameno = video_pos;
sh_video->num_frames_decoded = video_pos;
sh_video->num_frames = video_pos;
d_video->pts=AVS->frameno / sh_video->fps; // OSD
}
static int avs_check_file(demuxer_t *demuxer)
{
mp_msg(MSGT_DEMUX, MSGL_V, "AVS: avs_check_file - attempting to open file %s\n", demuxer->filename);
if (!demuxer->filename) return 0;
/* Avoid crazy memory eating when passing an mpg stream */
if (demuxer->movi_end > MAX_AVS_SIZE)
{
mp_msg(MSGT_DEMUX,MSGL_V, "AVS: File is too big, aborting...\n");
return 0;
}
demuxer->priv = initAVS(demuxer->filename);
if (demuxer->priv)
{
mp_msg(MSGT_DEMUX,MSGL_V, "AVS: Init Ok\n");
return DEMUXER_TYPE_AVS;
}
mp_msg(MSGT_DEMUX,MSGL_V, "AVS: Init failed\n");
return 0;
}
demuxer_desc_t demuxer_desc_avs = {
"Avisynth demuxer",
"avs",
"AVS",
"Gianluigi Tiesi",
"Requires binary dll",
DEMUXER_TYPE_AVS,
0, // unsafe autodetect
avs_check_file,
demux_avs_fill_buffer,
demux_open_avs,
demux_close_avs,
demux_seek_avs,
demux_avs_control
};
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