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authorRoman Shaposhnik <roman@shaposhnik.org>2003-10-01 23:34:46 +0000
committerRoman Shaposhnik <roman@shaposhnik.org>2003-10-01 23:34:46 +0000
commit4fa1c4fa8d88ac4f5c28b0395012d0679ea98327 (patch)
tree51160285dbd10708622872502e68d0781eb42459
parentc280f2d7c39e0ff15399554e7ccb4f541cfb8f4b (diff)
downloadffmpeg-4fa1c4fa8d88ac4f5c28b0395012d0679ea98327.tar.gz
* preAlpha DV encoding support -- there's still a truckload
of work to do, but it least people can try it out and share ideas. Please don't hesitate to give it a spin: $ ffmpeg -i file.avi file.dv is all you need. * fix for a deallocation bug in DV muxer Originally committed as revision 2327 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--Changelog1
-rw-r--r--doc/ffmpeg-doc.texi4
-rw-r--r--libavcodec/dv.c378
-rw-r--r--libavformat/dv.c1
4 files changed, 373 insertions, 11 deletions
diff --git a/Changelog b/Changelog
index aa7a0dd2d4..decb6e9dcf 100644
--- a/Changelog
+++ b/Changelog
@@ -1,4 +1,5 @@
version <next>:
+- DV encoder, DV muxer
- Microsoft RLE video decoder
- Microsoft Video-1 decoder
- Apple Video (RPZA) decoder
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi
index 1cdd2f6fa4..b0248b02fa 100644
--- a/doc/ffmpeg-doc.texi
+++ b/doc/ffmpeg-doc.texi
@@ -618,7 +618,7 @@ library:
@item MPEG4 @tab X @tab X
@tab MPEG4 is a variant of Quicktime
@item Raw MPEG4 video @tab X @tab X
-@item DV @tab @tab X
+@item DV @tab X @tab X
@item 4xm @tab @tab X
@tab 4X Technologies format, used in some games
@item Playstation STR @tab @tab X
@@ -668,7 +668,7 @@ following image formats are supported:
@item WMV8 @tab X @tab X @tab Not completely working
@item H263(+) @tab X @tab X @tab Also known as Real Video 1.0
@item MJPEG @tab X @tab X
-@item DV @tab @tab X
+@item DV @tab X @tab X
@item Huff YUV @tab X @tab X
@item Asus v1 @tab X @tab X @tab fourcc: ASV1
@item Asus v2 @tab X @tab X @tab fourcc: ASV2
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index 4281267f60..b9a39965c4 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -2,6 +2,12 @@
* DV decoder
* Copyright (c) 2002 Fabrice Bellard.
*
+ * DV encoder
+ * Copyright (c) 2003 Roman Shaposhnik.
+ *
+ * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
+ * of DV technical info.
+ *
* 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
@@ -19,7 +25,7 @@
/**
* @file dv.c
- * DV decoder.
+ * DV codec.
*/
#include "avcodec.h"
#include "dsputil.h"
@@ -72,7 +78,7 @@ static void dv_build_unquantize_tables(DVVideoDecodeContext *s)
}
}
-static int dvvideo_decode_init(AVCodecContext *avctx)
+static int dvvideo_init(AVCodecContext *avctx)
{
DVVideoDecodeContext *s = avctx->priv_data;
MpegEncContext s2;
@@ -140,6 +146,10 @@ static int dvvideo_decode_init(AVCodecContext *avctx)
/* XXX: do it only for constant case */
dv_build_unquantize_tables(s);
+ /* FIXME: I really don't think this should be here */
+ if (dv_codec_profile(avctx))
+ avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
+
return 0;
}
@@ -368,6 +378,9 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
mb->pos = 0;
mb->partial_bit_count = 0;
+#ifdef VLC_DEBUG
+ printf("MB block: %d, %d ", mb_index, j);
+#endif
dv_decode_ac(s, mb, block, last_index);
/* write the remaining bits in a new buffer only if the
@@ -391,7 +404,7 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
/* pass 2 : we can do it just after */
#ifdef VLC_DEBUG
- printf("***pass 2 size=%d\n", mb_bit_count);
+ printf("***pass 2 size=%d MB#=%d\n", mb_bit_count, mb_index);
#endif
block = block1;
mb = mb1;
@@ -501,6 +514,317 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
}
}
+/* Converts run and level (where level != 0) pair into vlc, returning bit size */
+static inline int dv_rl2vlc(int run, int l, uint32_t* vlc)
+{
+ int sign = l >> 8;
+ int level = (l ^ sign) - sign;
+ int size;
+
+ sign = (sign & 1);
+
+ if (run < 15 && level < 23 && dv_vlc_codes[run][level] != -1) {
+ *vlc = (dv_vlc_bits[dv_vlc_codes[run][level]] << 1) | sign;
+ size = dv_vlc_len[dv_vlc_codes[run][level]] + 1;
+ }
+ else {
+ if (level < 23) {
+ *vlc = (dv_vlc_bits[dv_vlc_codes[0][level]] << 1) | sign;
+ size = dv_vlc_len[dv_vlc_codes[0][level]] + 1;
+ } else {
+ *vlc = 0xfe00 | (level << 1) | sign;
+ size = 16;
+ }
+
+ switch(run) {
+ case 0:
+ break;
+ case 1:
+ case 2:
+ *vlc |= ((0x7ce | (run - 1)) << size);
+ size += 11;
+ break;
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ *vlc |= ((0xfac | (run - 3)) << size);
+ size += 12;
+ break;
+ default:
+ *vlc |= ((0x1f80 | (run - 1)) << size);
+ size += 13;
+ break;
+ }
+ }
+
+ return size;
+}
+
+typedef struct EncBlockInfo {
+ int qno;
+ int cno;
+ int dct_mode;
+ int block_size;
+ DCTELEM *mb;
+ PutBitContext pb;
+} EncBlockInfo;
+
+static inline int dv_bits_left(EncBlockInfo* bi)
+{
+ return (bi->block_size - get_bit_count(&bi->pb));
+}
+
+static inline void dv_encode_ac(EncBlockInfo* bi, PutBitContext* heap)
+{
+ int i, level, size, run = 0;
+ uint32_t vlc;
+ PutBitContext* cpb = &bi->pb;
+
+ for (i=1; i<64; i++) {
+ level = bi->mb[ff_zigzag_direct[i]] /
+ (1<<(dv_quant_shifts[bi->qno + dv_quant_offset[bi->cno]]
+ [dv_88_areas[ff_zigzag_direct[i]]] + 4 + (bi->cno == 3)));
+ if (level != 0) {
+ size = dv_rl2vlc(run, level, &vlc);
+put_vlc:
+
+#ifdef VLC_DEBUG
+ printf(" %3d:%3d", run, level);
+#endif
+ if (cpb == &bi->pb && size > dv_bits_left(bi)) {
+ size -= dv_bits_left(bi);
+ put_bits(cpb, dv_bits_left(bi), vlc >> size);
+ vlc = vlc & ((1<<size)-1);
+ cpb = heap;
+ }
+ put_bits(cpb, size, vlc);
+ run = 0;
+ } else
+ run++;
+ }
+
+ if (i == 64) {
+ size = 4; vlc = 6; /* End Of Block stamp */
+ goto put_vlc;
+ }
+}
+
+static inline void dv_redistr_bits(EncBlockInfo* bi, int count, uint8_t* extra_data, int extra_bits, PutBitContext* heap)
+{
+ int i;
+ GetBitContext gb;
+
+ init_get_bits(&gb, extra_data, extra_bits);
+
+ for (i=0; i<count; i++) {
+ int bits_left = dv_bits_left(bi);
+#ifdef VLC_DEBUG
+ if (bits_left)
+ printf("------------> inserting %d bytes in %d:%d\n", bits_left, i/6, i%6);
+#endif
+ if (bits_left > extra_bits) {
+ bit_copy(&bi->pb, &gb, extra_bits);
+ extra_bits = 0;
+ break;
+ } else
+ bit_copy(&bi->pb, &gb, bits_left);
+
+ extra_bits -= bits_left;
+ bi++;
+ }
+
+ if (extra_bits > 0 && heap)
+ bit_copy(heap, &gb, extra_bits);
+}
+
+static inline void dv_set_class_number(EncBlockInfo* bi, int j)
+{
+ int i, max_ac = 0;
+
+ for (i=1; i<64; i++) {
+ int ac = abs(bi->mb[ff_zigzag_direct[i]]) / 4;
+ if (max_ac < ac)
+ max_ac = ac;
+ }
+ if (max_ac < 12)
+ bi->cno = j;
+ else if (max_ac < 24)
+ bi->cno = j + 1;
+ else if (max_ac < 36)
+ bi->cno = j + 2;
+ else
+ bi->cno = j + 3;
+
+ if (bi->cno > 3)
+ bi->cno = 3;
+}
+
+/*
+ * This is a very rough initial implementaion. The performance is
+ * horrible and some features are missing, mainly 2-4-8 DCT encoding.
+ * The weighting is missing as well, but it's missing from the decoding
+ * step also -- so at least we're on the same page with decoder ;-)
+ */
+static inline void dv_encode_video_segment(DVVideoDecodeContext *s,
+ uint8_t *dif,
+ const uint16_t *mb_pos_ptr)
+{
+ int mb_index, i, j, v;
+ int mb_x, mb_y, c_offset, linesize;
+ uint8_t* y_ptr;
+ uint8_t* data;
+ int do_edge_wrap;
+ DCTELEM *block;
+ EncBlockInfo enc_blks[5*6];
+ EncBlockInfo* enc_blk;
+ int free_vs_bits;
+ int extra_bits;
+ PutBitContext extra_vs;
+ uint8_t extra_vs_data[5*6*128];
+ uint8_t extra_mb_data[6*128];
+
+ int QNO = 15;
+
+ /* Stage 1 -- doing DCT on 5 MBs */
+ block = &s->block[0][0];
+ for(mb_index = 0; mb_index < 5; mb_index++) {
+ v = *mb_pos_ptr++;
+ mb_x = v & 0xff;
+ mb_y = v >> 8;
+ y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
+ c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ?
+ ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) :
+ (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
+ do_edge_wrap = 0;
+ for(j = 0;j < 6; j++) {
+ if (j < 4) { /* Four Y blocks */
+ /* NOTE: at end of line, the macroblock is handled as 420 */
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
+ data = y_ptr + (j * 8);
+ } else {
+ data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
+ }
+ linesize = s->picture.linesize[0];
+ } else { /* Cr and Cb blocks */
+ /* don't ask Fabrice why they inverted Cb and Cr ! */
+ data = s->picture.data[6 - j] + c_offset;
+ linesize = s->picture.linesize[6 - j];
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
+ do_edge_wrap = 1;
+ }
+
+ /* Everything is set up -- now just copy data -> DCT block */
+ if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */
+ uint8_t* d;
+ DCTELEM *b = block;
+ for (i=0;i<8;i++) {
+ d = data + 8 * linesize;
+ b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3];
+ b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
+ data += linesize;
+ b += 8;
+ }
+ } else { /* Simple copy: 8x8 -> 8x8 */
+ s->get_pixels(block, data, linesize);
+ }
+
+ s->fdct(block);
+
+ block += 64;
+ }
+ }
+
+ /* Stage 2 -- setup for encoding phase */
+ enc_blk = &enc_blks[0];
+ block = &s->block[0][0];
+ for (i=0; i<5; i++) {
+ for (j=0; j<6; j++) {
+ enc_blk->mb = block;
+ enc_blk->dct_mode = 0;
+ enc_blk->block_size = block_sizes[j];
+
+ dv_set_class_number(enc_blk, j/4*(j%2));
+
+ block += 64;
+ enc_blk++;
+ }
+ }
+
+ /* Stage 3 -- encoding by trial-and-error */
+encode_vs:
+ enc_blk = &enc_blks[0];
+ for (i=0; i<5; i++) {
+ uint8_t* p = dif + i*80 + 4;
+ for (j=0; j<6; j++) {
+ enc_blk->qno = QNO;
+ init_put_bits(&enc_blk->pb, p, block_sizes[j]/8, NULL, NULL);
+ enc_blk++;
+ p += block_sizes[j]/8;
+ }
+ }
+
+ init_put_bits(&extra_vs, extra_vs_data, sizeof(extra_vs_data), NULL, NULL);
+ free_vs_bits = 0;
+ enc_blk = &enc_blks[0];
+ for (i=0; i<5; i++) {
+ PutBitContext extra_mb;
+ EncBlockInfo* enc_blk2 = enc_blk;
+ int free_mb_bits = 0;
+
+ init_put_bits(&extra_mb, extra_mb_data, sizeof(extra_mb_data), NULL, NULL);
+ dif[i*80 + 3] = enc_blk->qno;
+
+ for (j=0; j<6; j++) {
+ uint16_t dc = ((enc_blk->mb[0] >> 3) - 1024) >> 2;
+
+ put_bits(&enc_blk->pb, 9, dc);
+ put_bits(&enc_blk->pb, 1, enc_blk->dct_mode);
+ put_bits(&enc_blk->pb, 2, enc_blk->cno);
+
+#ifdef VLC_DEBUG
+ printf("[%d, %d]: ", i, j);
+#endif
+ dv_encode_ac(enc_blk, &extra_mb);
+#ifdef VLC_DEBUG
+ printf("\n");
+#endif
+
+ free_mb_bits += dv_bits_left(enc_blk);
+ enc_blk++;
+ }
+
+ /* We can't flush extra_mb just yet -- since it'll round up bit number */
+ extra_bits = get_bit_count(&extra_mb);
+ if (free_mb_bits > extra_bits)
+ free_vs_bits += free_mb_bits - extra_bits;
+
+ if (extra_bits) { /* FIXME: speed up things when free_mb_bits == 0 */
+ flush_put_bits(&extra_mb);
+ dv_redistr_bits(enc_blk2, 6, extra_mb_data, extra_bits, &extra_vs);
+ }
+ }
+
+ /* We can't flush extra_mb just yet -- since it'll round up bit number */
+ extra_bits = get_bit_count(&extra_vs);
+ if (extra_bits > free_vs_bits && QNO) { /* FIXME: very crude trial-and-error */
+ QNO--;
+ goto encode_vs;
+ }
+
+ if (extra_bits) {
+ flush_put_bits(&extra_vs);
+ dv_redistr_bits(&enc_blks[0], 5*6, extra_vs_data, extra_bits, NULL);
+ }
+
+ for (i=0; i<6*5; i++) {
+ flush_put_bits(&enc_blks[i].pb);
+#ifdef VLC_DEBUG
+ printf("[%d:%d] qno=%d cno=%d\n", i/6, i%6, enc_blks[i].qno, enc_blks[i].cno);
+#endif
+ }
+}
+
/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
144000 bytes for PAL) */
static int dvvideo_decode_frame(AVCodecContext *avctx,
@@ -535,6 +859,9 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
if ((vs % 3) == 0)
buf += 80; /* skip audio block */
+#ifdef VLC_DEBUG
+ printf("********************* %d, %d **********************\n", ds, vs);
+#endif
dv_decode_video_segment(s, buf, mb_pos_ptr);
buf += 5 * 80;
mb_pos_ptr += 5;
@@ -550,10 +877,45 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
return s->sys->frame_size;
}
-static int dvvideo_decode_end(AVCodecContext *avctx)
+static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
+ void *data)
{
- avcodec_default_free_buffers(avctx);
+ DVVideoDecodeContext *s = c->priv_data;
+ const uint16_t *mb_pos_ptr;
+ int ds, vs;
+
+ s->sys = dv_codec_profile(c);
+ if (!s->sys)
+ return -1;
+
+ c->pix_fmt = s->sys->pix_fmt;
+ s->picture = *((AVFrame *)data);
+
+ /* for each DIF segment */
+ mb_pos_ptr = s->sys->video_place;
+ for (ds = 0; ds < s->sys->difseg_size; ds++) {
+ buf += 6 * 80; /* skip DIF segment header */
+
+ for(vs = 0; vs < 27; vs++) {
+ if ((vs % 3) == 0)
+ buf += 80; /* skip audio block */
+
+#ifdef VLC_DEBUG
+ printf("********************* %d, %d **********************\n", ds, vs);
+#endif
+ dv_encode_video_segment(s, buf, mb_pos_ptr);
+ buf += 5 * 80;
+ mb_pos_ptr += 5;
+ }
+ }
+ emms_c();
+ return s->sys->frame_size;
+}
+
+static int dvvideo_end(AVCodecContext *avctx)
+{
+ avcodec_default_free_buffers(avctx);
return 0;
}
@@ -562,9 +924,9 @@ AVCodec dvvideo_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_DVVIDEO,
sizeof(DVVideoDecodeContext),
- dvvideo_decode_init,
- NULL,
- dvvideo_decode_end,
+ dvvideo_init,
+ dvvideo_encode_frame,
+ dvvideo_end,
dvvideo_decode_frame,
CODEC_CAP_DR1,
NULL
diff --git a/libavformat/dv.c b/libavformat/dv.c
index b8e41be400..a132f97dde 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -678,7 +678,6 @@ bail_out:
void dv_delete_mux(DVMuxContext *c)
{
fifo_free(&c->audio_data);
- av_free(c);
}
DVDemuxContext* dv_init_demux(AVFormatContext *s, int vid, int aid)