[Ffmpeg-cvslog] r6123 - trunk/libavformat/avisynth.c
gpoirier
subversion
Tue Aug 29 10:15:38 CEST 2006
Author: gpoirier
Date: Tue Aug 29 10:15:38 2006
New Revision: 6123
Added:
trunk/libavformat/avisynth.c
Log:
Add missing file from commit r6122 (AVISynth support)
Added: trunk/libavformat/avisynth.c
==============================================================================
--- (empty file)
+++ trunk/libavformat/avisynth.c Tue Aug 29 10:15:38 2006
@@ -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 <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_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;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",
+ "AVISynth",
+ sizeof(AVISynthContext),
+ NULL,
+ avisynth_read_header,
+ avisynth_read_packet,
+ avisynth_read_close,
+ avisynth_read_seek,
+ NULL,
+ 0,
+ "avs",
+};
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