From 9dc5607b3cbdad80f2b63a6090c23b2ac9e0e593 Mon Sep 17 00:00:00 2001 From: Guillaume Poirier Date: Tue, 29 Aug 2006 08:15:38 +0000 Subject: Add missing file from commit r6122 (AVISynth support) Originally committed as revision 6123 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/avisynth.c | 219 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 219 insertions(+) create mode 100644 libavformat/avisynth.c (limited to 'libavformat/avisynth.c') diff --git a/libavformat/avisynth.c b/libavformat/avisynth.c new file mode 100644 index 0000000000..80019c17b2 --- /dev/null +++ b/libavformat/avisynth.c @@ -0,0 +1,219 @@ +/* + * AVISynth support for ffmpeg system + * Copyright (c) 2006 DivX, Inc. + * + * This library 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 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; 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 +#include + +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; idstreams[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_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_id = wav_codec_get_id(wvfmt.wFormatTag, st->codec->bits_per_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_sample = stream->info.dwSampleSize * 8; + st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale; + st->codec->codec_id = codec_get_id(codec_bmp_tags, stream->info.fccHandler); + + st->duration = stream->info.dwLength; + } + else + { + AVIStreamRelease(stream->handle); + continue; + } + + avs->nb_streams++; + st->codec->codec_tag = stream->info.fccHandler; + + 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_IO; + + if (av_new_packet(pkt, stream->chunck_size)) + return AVERROR_IO; + 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;inb_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", + "AVISynth", + sizeof(AVISynthContext), + NULL, + avisynth_read_header, + avisynth_read_packet, + avisynth_read_close, + avisynth_read_seek, + NULL, + 0, + "avs", +}; -- cgit v1.2.3