mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 16:52:31 +00:00
1a40491ef2
patch by Daniel Verkamp, aniel drv nu Originally committed as revision 19254 to svn://svn.ffmpeg.org/ffmpeg/trunk
223 lines
6.7 KiB
C
223 lines
6.7 KiB
C
/*
|
|
* AVISynth support for ffmpeg system
|
|
* Copyright (c) 2006 DivX, Inc.
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "riff.h"
|
|
|
|
#include <windows.h>
|
|
#include <vfw.h>
|
|
|
|
typedef struct {
|
|
PAVISTREAM handle;
|
|
AVISTREAMINFO info;
|
|
DWORD read;
|
|
LONG chunck_size;
|
|
LONG chunck_samples;
|
|
} AVISynthStream;
|
|
|
|
typedef struct {
|
|
PAVIFILE file;
|
|
AVISynthStream *streams;
|
|
int nb_streams;
|
|
int next_stream;
|
|
} AVISynthContext;
|
|
|
|
static int avisynth_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
AVISynthContext *avs = s->priv_data;
|
|
HRESULT res;
|
|
AVIFILEINFO info;
|
|
DWORD id;
|
|
AVStream *st;
|
|
AVISynthStream *stream;
|
|
|
|
AVIFileInit();
|
|
|
|
res = AVIFileOpen(&avs->file, s->filename, OF_READ|OF_SHARE_DENY_WRITE, NULL);
|
|
if (res != S_OK)
|
|
{
|
|
av_log(s, AV_LOG_ERROR, "AVIFileOpen failed with error %ld", res);
|
|
AVIFileExit();
|
|
return -1;
|
|
}
|
|
|
|
res = AVIFileInfo(avs->file, &info, sizeof(info));
|
|
if (res != S_OK)
|
|
{
|
|
av_log(s, AV_LOG_ERROR, "AVIFileInfo failed with error %ld", res);
|
|
AVIFileExit();
|
|
return -1;
|
|
}
|
|
|
|
avs->streams = av_mallocz(info.dwStreams * sizeof(AVISynthStream));
|
|
|
|
for (id=0; id<info.dwStreams; id++)
|
|
{
|
|
stream = &avs->streams[id];
|
|
stream->read = 0;
|
|
if (AVIFileGetStream(avs->file, &stream->handle, 0, id) == S_OK)
|
|
{
|
|
if (AVIStreamInfo(stream->handle, &stream->info, sizeof(stream->info)) == S_OK)
|
|
{
|
|
if (stream->info.fccType == streamtypeAUDIO)
|
|
{
|
|
WAVEFORMATEX wvfmt;
|
|
LONG struct_size = sizeof(WAVEFORMATEX);
|
|
if (AVIStreamReadFormat(stream->handle, 0, &wvfmt, &struct_size) != S_OK)
|
|
continue;
|
|
|
|
st = av_new_stream(s, id);
|
|
st->codec->codec_type = CODEC_TYPE_AUDIO;
|
|
|
|
st->codec->block_align = wvfmt.nBlockAlign;
|
|
st->codec->channels = wvfmt.nChannels;
|
|
st->codec->sample_rate = wvfmt.nSamplesPerSec;
|
|
st->codec->bit_rate = wvfmt.nAvgBytesPerSec * 8;
|
|
st->codec->bits_per_coded_sample = wvfmt.wBitsPerSample;
|
|
|
|
stream->chunck_samples = wvfmt.nSamplesPerSec * (uint64_t)info.dwScale / (uint64_t)info.dwRate;
|
|
stream->chunck_size = stream->chunck_samples * wvfmt.nChannels * wvfmt.wBitsPerSample / 8;
|
|
|
|
st->codec->codec_tag = wvfmt.wFormatTag;
|
|
st->codec->codec_id = ff_wav_codec_get_id(wvfmt.wFormatTag, st->codec->bits_per_coded_sample);
|
|
}
|
|
else if (stream->info.fccType == streamtypeVIDEO)
|
|
{
|
|
BITMAPINFO imgfmt;
|
|
LONG struct_size = sizeof(BITMAPINFO);
|
|
|
|
stream->chunck_size = stream->info.dwSampleSize;
|
|
stream->chunck_samples = 1;
|
|
|
|
if (AVIStreamReadFormat(stream->handle, 0, &imgfmt, &struct_size) != S_OK)
|
|
continue;
|
|
|
|
st = av_new_stream(s, id);
|
|
st->codec->codec_type = CODEC_TYPE_VIDEO;
|
|
st->r_frame_rate.num = stream->info.dwRate;
|
|
st->r_frame_rate.den = stream->info.dwScale;
|
|
|
|
st->codec->width = imgfmt.bmiHeader.biWidth;
|
|
st->codec->height = imgfmt.bmiHeader.biHeight;
|
|
|
|
st->codec->bits_per_coded_sample = imgfmt.bmiHeader.biBitCount;
|
|
st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
|
|
st->codec->codec_tag = imgfmt.bmiHeader.biCompression;
|
|
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, imgfmt.bmiHeader.biCompression);
|
|
|
|
st->duration = stream->info.dwLength;
|
|
}
|
|
else
|
|
{
|
|
AVIStreamRelease(stream->handle);
|
|
continue;
|
|
}
|
|
|
|
avs->nb_streams++;
|
|
|
|
st->codec->stream_codec_tag = stream->info.fccHandler;
|
|
|
|
av_set_pts_info(st, 64, info.dwScale, info.dwRate);
|
|
st->start_time = stream->info.dwStart;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVISynthContext *avs = s->priv_data;
|
|
HRESULT res;
|
|
AVISynthStream *stream;
|
|
int stream_id = avs->next_stream;
|
|
LONG read_size;
|
|
|
|
// handle interleaving manually...
|
|
stream = &avs->streams[stream_id];
|
|
|
|
if (stream->read >= stream->info.dwLength)
|
|
return AVERROR(EIO);
|
|
|
|
if (av_new_packet(pkt, stream->chunck_size))
|
|
return AVERROR(EIO);
|
|
pkt->stream_index = stream_id;
|
|
pkt->pts = avs->streams[stream_id].read / avs->streams[stream_id].chunck_samples;
|
|
|
|
res = AVIStreamRead(stream->handle, stream->read, stream->chunck_samples, pkt->data, stream->chunck_size, &read_size, NULL);
|
|
|
|
pkt->pts = stream->read;
|
|
pkt->size = read_size;
|
|
|
|
stream->read += stream->chunck_samples;
|
|
|
|
// prepare for the next stream to read
|
|
do {
|
|
avs->next_stream = (avs->next_stream+1) % avs->nb_streams;
|
|
} while (avs->next_stream != stream_id && s->streams[avs->next_stream]->discard >= AVDISCARD_ALL);
|
|
|
|
return (res == S_OK) ? pkt->size : -1;
|
|
}
|
|
|
|
static int avisynth_read_close(AVFormatContext *s)
|
|
{
|
|
AVISynthContext *avs = s->priv_data;
|
|
int i;
|
|
|
|
for (i=0;i<avs->nb_streams;i++)
|
|
{
|
|
AVIStreamRelease(avs->streams[i].handle);
|
|
}
|
|
|
|
av_free(avs->streams);
|
|
AVIFileRelease(avs->file);
|
|
AVIFileExit();
|
|
return 0;
|
|
}
|
|
|
|
static int avisynth_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
|
|
{
|
|
AVISynthContext *avs = s->priv_data;
|
|
int stream_id;
|
|
|
|
for (stream_id = 0; stream_id < avs->nb_streams; stream_id++)
|
|
{
|
|
avs->streams[stream_id].read = pts * avs->streams[stream_id].chunck_samples;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat avisynth_demuxer = {
|
|
"avs",
|
|
NULL_IF_CONFIG_SMALL("AVISynth"),
|
|
sizeof(AVISynthContext),
|
|
NULL,
|
|
avisynth_read_header,
|
|
avisynth_read_packet,
|
|
avisynth_read_close,
|
|
avisynth_read_seek,
|
|
NULL,
|
|
0,
|
|
"avs",
|
|
};
|