3 * Copyright (c) 2006 DivX, Inc.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
39 AVISynthStream *streams;
44 static int avisynth_read_header(AVFormatContext *s)
46 AVISynthContext *avs = s->priv_data;
51 AVISynthStream *stream;
52 wchar_t filename_wchar[1024] = { 0 };
53 char filename_char[1024] = { 0 };
57 /* avisynth can't accept UTF-8 filename */
58 MultiByteToWideChar(CP_UTF8, 0, s->filename, -1, filename_wchar, 1024);
59 WideCharToMultiByte(CP_THREAD_ACP, 0, filename_wchar, -1, filename_char, 1024, NULL, NULL);
60 res = AVIFileOpen(&avs->file, filename_char, OF_READ|OF_SHARE_DENY_WRITE, NULL);
63 av_log(s, AV_LOG_ERROR, "AVIFileOpen failed with error %ld\n", res);
68 res = AVIFileInfo(avs->file, &info, sizeof(info));
71 av_log(s, AV_LOG_ERROR, "AVIFileInfo failed with error %ld\n", res);
76 avs->streams = av_mallocz(info.dwStreams * sizeof(AVISynthStream));
78 for (id=0; id<info.dwStreams; id++)
80 stream = &avs->streams[id];
82 if (AVIFileGetStream(avs->file, &stream->handle, 0, id) == S_OK)
84 if (AVIStreamInfo(stream->handle, &stream->info, sizeof(stream->info)) == S_OK)
86 if (stream->info.fccType == streamtypeAUDIO)
89 LONG struct_size = sizeof(WAVEFORMATEX);
90 if (AVIStreamReadFormat(stream->handle, 0, &wvfmt, &struct_size) != S_OK)
93 st = avformat_new_stream(s, NULL);
95 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
97 st->codec->block_align = wvfmt.nBlockAlign;
98 st->codec->channels = wvfmt.nChannels;
99 st->codec->sample_rate = wvfmt.nSamplesPerSec;
100 st->codec->bit_rate = wvfmt.nAvgBytesPerSec * 8;
101 st->codec->bits_per_coded_sample = wvfmt.wBitsPerSample;
103 stream->chunck_samples = wvfmt.nSamplesPerSec * (uint64_t)info.dwScale / (uint64_t)info.dwRate;
104 stream->chunck_size = stream->chunck_samples * wvfmt.nChannels * wvfmt.wBitsPerSample / 8;
106 st->codec->codec_tag = wvfmt.wFormatTag;
107 st->codec->codec_id = ff_wav_codec_get_id(wvfmt.wFormatTag, st->codec->bits_per_coded_sample);
109 else if (stream->info.fccType == streamtypeVIDEO)
112 LONG struct_size = sizeof(BITMAPINFO);
114 stream->chunck_size = stream->info.dwSampleSize;
115 stream->chunck_samples = 1;
117 if (AVIStreamReadFormat(stream->handle, 0, &imgfmt, &struct_size) != S_OK)
120 st = avformat_new_stream(s, NULL);
122 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
123 st->r_frame_rate.num = stream->info.dwRate;
124 st->r_frame_rate.den = stream->info.dwScale;
126 st->codec->width = imgfmt.bmiHeader.biWidth;
127 st->codec->height = imgfmt.bmiHeader.biHeight;
129 st->codec->bits_per_coded_sample = imgfmt.bmiHeader.biBitCount;
130 st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
131 st->codec->codec_tag = imgfmt.bmiHeader.biCompression;
132 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, imgfmt.bmiHeader.biCompression);
133 if (st->codec->codec_id == CODEC_ID_RAWVIDEO && imgfmt.bmiHeader.biCompression== BI_RGB) {
134 st->codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
135 if (st->codec->extradata) {
136 st->codec->extradata_size = 9;
137 memcpy(st->codec->extradata, "BottomUp", 9);
142 st->duration = stream->info.dwLength;
146 AVIStreamRelease(stream->handle);
152 st->codec->stream_codec_tag = stream->info.fccHandler;
154 avpriv_set_pts_info(st, 64, info.dwScale, info.dwRate);
155 st->start_time = stream->info.dwStart;
163 static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
165 AVISynthContext *avs = s->priv_data;
167 AVISynthStream *stream;
168 int stream_id = avs->next_stream;
171 // handle interleaving manually...
172 stream = &avs->streams[stream_id];
174 if (stream->read >= stream->info.dwLength)
177 if (av_new_packet(pkt, stream->chunck_size))
179 pkt->stream_index = stream_id;
180 pkt->pts = avs->streams[stream_id].read / avs->streams[stream_id].chunck_samples;
182 res = AVIStreamRead(stream->handle, stream->read, stream->chunck_samples, pkt->data, stream->chunck_size, &read_size, NULL);
184 pkt->size = read_size;
186 stream->read += stream->chunck_samples;
188 // prepare for the next stream to read
190 avs->next_stream = (avs->next_stream+1) % avs->nb_streams;
191 } while (avs->next_stream != stream_id && s->streams[avs->next_stream]->discard >= AVDISCARD_ALL);
193 return (res == S_OK) ? pkt->size : -1;
196 static int avisynth_read_close(AVFormatContext *s)
198 AVISynthContext *avs = s->priv_data;
201 for (i=0;i<avs->nb_streams;i++)
203 AVIStreamRelease(avs->streams[i].handle);
206 av_free(avs->streams);
207 AVIFileRelease(avs->file);
212 static int avisynth_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
214 AVISynthContext *avs = s->priv_data;
217 for (stream_id = 0; stream_id < avs->nb_streams; stream_id++)
219 avs->streams[stream_id].read = pts * avs->streams[stream_id].chunck_samples;
225 AVInputFormat ff_avisynth_demuxer = {
227 .long_name = NULL_IF_CONFIG_SMALL("AVISynth"),
228 .priv_data_size = sizeof(AVISynthContext),
229 .read_header = avisynth_read_header,
230 .read_packet = avisynth_read_packet,
231 .read_close = avisynth_read_close,
232 .read_seek = avisynth_read_seek,