Release synfig_0_61_03

[synfig.git] / synfig-core / tags / synfig_0_61_03 / synfig-core / src / modules / mod_libavcodec / libavformat / dv.c

diff --git a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavformat/dv.c b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavformat/dv.c
new file mode 100644 (file)
index 0000000..e5f2d47
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavformat/dv.c
@@ -0,0 +1,164 @@
+/* 
+ * Raw DV format
+ * Copyright (c) 2002 Fabrice Bellard.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avformat.h"
+#include "dvcore.h"
+
+typedef struct DVDemuxContext {
+    int       is_audio;
+    uint8_t   buf[144000];    
+    int       size;
+} DVDemuxContext;
+
+/* raw input */
+static int dv_read_header(AVFormatContext *s,
+                          AVFormatParameters *ap)
+{
+    AVStream *vst, *ast;
+    DVDemuxContext *c = s->priv_data;
+
+    vst = av_new_stream(s, 0);
+    if (!vst)
+        return AVERROR_NOMEM;
+    vst->codec.codec_type = CODEC_TYPE_VIDEO;
+    vst->codec.codec_id = CODEC_ID_DVVIDEO;
+    vst->codec.bit_rate = 25000000;
+
+    ast = av_new_stream(s, 1);
+    if (!ast)
+        return AVERROR_NOMEM;
+
+    ast->codec.codec_type = CODEC_TYPE_AUDIO;
+    ast->codec.codec_id = CODEC_ID_DVAUDIO;
+    c->is_audio = 0;
+
+    return 0;
+}
+
+static void __destruct_pkt(struct AVPacket *pkt)
+{
+    pkt->data = NULL; pkt->size = 0;
+    return;
+}
+
+static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret;
+    DVDemuxContext *c = s->priv_data;
+    
+    if (!c->is_audio) {
+        ret = get_buffer(&s->pb, c->buf, 4);
+        if (ret <= 0) 
+            return -EIO;
+       c->size = dv_frame_profile(&c->buf[0])->frame_size;
+       
+       ret = get_buffer(&s->pb, c->buf + 4, c->size - 4);
+       if (ret <= 0)
+           return -EIO;
+    }
+    
+    av_init_packet(pkt);
+    pkt->destruct = __destruct_pkt;
+    pkt->data     = c->buf;
+    pkt->size     = c->size;
+    pkt->stream_index = c->is_audio;
+    pkt->flags   |= PKT_FLAG_KEY;
+    
+    c->is_audio = !c->is_audio;
+    return c->size;
+}
+
+static int dv_read_close(AVFormatContext *s)
+{
+    return 0;
+}
+
+int dv_write_header(struct AVFormatContext *s)
+{
+    DVMuxContext *c = s->priv_data;
+    
+    if (s->nb_streams != 2 || dv_core_init(c, s->streams) != 0) {
+        fprintf(stderr, "Can't initialize DV format!\n"
+                   "Make sure that you supply exactly two streams:\n"
+                   "     video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM\n");
+       return -1;
+    }
+    return 0;
+}
+
+int dv_write_packet(struct AVFormatContext *s, 
+                    int stream_index,
+                    const uint8_t *buf, int size, int64_t pts)
+{
+    DVMuxContext *c = s->priv_data;
+   
+    if (stream_index == c->vst)
+        dv_assemble_frame(c, buf, NULL, 0);
+    else
+        dv_assemble_frame(c, NULL, buf, size);
+   
+    if (c->has_audio && c->has_video) {
+        put_buffer(&s->pb, &c->frame_buf[0], c->sys->frame_size);
+        put_flush_packet(&s->pb);
+    }
+    
+    return 0;
+}
+
+/* 
+ * We might end up with some extra A/V data without matching counterpart.
+ * E.g. video data without enough audio to write the complete frame.
+ * Currently we simply drop the last frame. I don't know whether this 
+ * is the best strategy of all
+ */
+int dv_write_trailer(struct AVFormatContext *s)
+{
+    dv_core_delete((DVMuxContext *)s->priv_data);
+    return 0;
+}
+
+static AVInputFormat dv_iformat = {
+    "dv",
+    "DV video format",
+    sizeof(DVDemuxContext),
+    NULL,
+    dv_read_header,
+    dv_read_packet,
+    dv_read_close,
+    .extensions = "dv",
+};
+
+AVOutputFormat dv_oformat = {
+    "dv",
+    "DV video format",
+    NULL,
+    "dv",
+    sizeof(DVMuxContext),
+    CODEC_ID_PCM_S16LE,
+    CODEC_ID_DVVIDEO,
+    dv_write_header,
+    dv_write_packet,
+    dv_write_trailer,
+};
+
+int dv_init(void)
+{
+    av_register_input_format(&dv_iformat);
+    av_register_output_format(&dv_oformat);
+    return 0;
+}