* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avformat.h"
-
-#define NTSC_FRAME_SIZE 120000
-#define PAL_FRAME_SIZE 144000
+#include "dvcore.h"
typedef struct DVDemuxContext {
- int is_audio;
+ int is_audio;
+ uint8_t buf[144000];
+ int size;
} DVDemuxContext;
/* raw input */
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;
-#if 0
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;
-#endif
+ c->is_audio = 0;
+
return 0;
}
-/* XXX: build fake audio stream when DV audio decoder will be finished */
+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, size, dsf;
- uint8_t buf[4];
+ int ret;
+ DVDemuxContext *c = s->priv_data;
- ret = get_buffer(&s->pb, buf, 4);
- if (ret <= 0)
- return -EIO;
- dsf = buf[3] & 0x80;
- if (!dsf)
- size = NTSC_FRAME_SIZE;
- else
- size = PAL_FRAME_SIZE;
-
- if (av_new_packet(pkt, size) < 0)
- return -EIO;
-
- pkt->stream_index = 0;
- memcpy(pkt->data, buf, 4);
- ret = get_buffer(&s->pb, pkt->data + 4, size - 4);
- if (ret <= 0) {
- av_free_packet(pkt);
- return -EIO;
+ 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;
}
- return ret;
+
+ 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;
}
-static AVInputFormat dv_iformat = {
- "dv",
- "DV video format",
- sizeof(DVDemuxContext),
- NULL,
- dv_read_header,
- dv_read_packet,
- dv_read_close,
- .extensions = "dv",
-};
-
-#if 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 stream_index,
unsigned char *buf, int size, int force_pts)
{
- put_buffer(&s->pb, buf, size);
- put_flush_packet(&s->pb);
+ 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",
- 0,
+ sizeof(DVMuxContext),
+ CODEC_ID_PCM_S16LE,
CODEC_ID_DVVIDEO,
- CODEC_ID_DVAUDIO,
dv_write_header,
dv_write_packet,
dv_write_trailer,
};
-#endif
int dv_init(void)
{
av_register_input_format(&dv_iformat);
- // av_register_output_format(&dv_oformat);
+ av_register_output_format(&dv_oformat);
return 0;
}