+/*
+ * 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;
+}