| /* |
| * 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 = AVMEDIA_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 = AVMEDIA_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); |
| if (st->codec->codec_id == CODEC_ID_RAWVIDEO && imgfmt.bmiHeader.biCompression== BI_RGB) { |
| st->codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (st->codec->extradata) { |
| st->codec->extradata_size = 9; |
| memcpy(st->codec->extradata, "BottomUp", 9); |
| } |
| } |
| |
| |
| 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->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 ff_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", |
| }; |