* 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
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+
+/**
+ * @file dv.c
+ * DV codec.
+ */
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "simple_idct.h"
-
-#define NTSC_FRAME_SIZE 120000
-#define PAL_FRAME_SIZE 144000
-
-#define TEX_VLC_BITS 9
+#include "dvdata.h"
typedef struct DVVideoDecodeContext {
- AVCodecContext *avctx;
+ const DVprofile* sys;
GetBitContext gb;
- VLC *vlc;
- int sampling_411; /* 0 = 420, 1 = 411 */
- int width, height;
- UINT8 *current_picture[3]; /* picture structure */
- int linesize[3];
+ AVFrame picture;
DCTELEM block[5*6][64] __align8;
- UINT8 dv_zigzag[2][64];
- UINT8 idct_permutation[64];
+
+ /* FIXME: the following is extracted from DSP */
+ uint8_t dv_zigzag[2][64];
+ uint8_t idct_permutation[64];
+ void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
+ void (*fdct)(DCTELEM *block);
+
/* XXX: move it to static storage ? */
- UINT8 dv_shift[2][22][64];
- void (*idct_put[2])(UINT8 *dest, int line_size, DCTELEM *block);
+ uint8_t dv_shift[2][22][64];
+ void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
} DVVideoDecodeContext;
-#include "dvdata.h"
-
-static VLC dv_vlc;
+#define TEX_VLC_BITS 9
/* XXX: also include quantization */
static RL_VLC_ELEM *dv_rl_vlc[1];
+static VLC_TYPE dv_vlc_codes[15][23];
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;
- static int done;
+ static int done=0;
if (!done) {
int i;
+ VLC dv_vlc;
done = 1;
dv_rl_vlc[0][i].level = level;
dv_rl_vlc[0][i].run = run;
}
+
+ memset(dv_vlc_codes, 0xff, sizeof(dv_vlc_codes));
+ for (i = 0; i < NB_DV_VLC - 1; i++) {
+ if (dv_vlc_run[i] < 15 && dv_vlc_level[i] < 23 && dv_vlc_len[i] < 15)
+ dv_vlc_codes[dv_vlc_run[i]][dv_vlc_level[i]] = i;
+ }
}
/* ugly way to get the idct & scantable */
/* XXX: fix it */
memset(&s2, 0, sizeof(MpegEncContext));
s2.avctx = avctx;
+ dsputil_init(&s2.dsp, avctx);
if (DCT_common_init(&s2) < 0)
return -1;
- s->idct_put[0] = s2.idct_put;
- memcpy(s->idct_permutation, s2.idct_permutation, 64);
+ s->get_pixels = s2.dsp.get_pixels;
+ s->fdct = s2.dsp.fdct;
+
+ s->idct_put[0] = s2.dsp.idct_put;
+ memcpy(s->idct_permutation, s2.dsp.idct_permutation, 64);
memcpy(s->dv_zigzag[0], s2.intra_scantable.permutated, 64);
/* XXX: use MMX also for idct248 */
/* 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;
}
-//#define VLC_DEBUG
+// #define VLC_DEBUG
typedef struct BlockInfo {
- const UINT8 *shift_table;
- const UINT8 *scan_table;
- UINT8 pos; /* position in block */
- UINT8 eob_reached; /* true if EOB has been reached */
- UINT8 dct_mode;
- UINT8 partial_bit_count;
- UINT16 partial_bit_buffer;
+ const uint8_t *shift_table;
+ const uint8_t *scan_table;
+ uint8_t pos; /* position in block */
+ uint8_t eob_reached; /* true if EOB has been reached */
+ uint8_t dct_mode;
+ uint8_t partial_bit_count;
+ uint16_t partial_bit_buffer;
int shift_offset;
} BlockInfo;
/* block size in bits */
-static const UINT16 block_sizes[6] = {
+static const uint16_t block_sizes[6] = {
112, 112, 112, 112, 80, 80
};
#ifndef ALT_BITSTREAM_READER
-#error only works with ALT_BITSTREAM_READER
+#warning only works with ALT_BITSTREAM_READER
#endif
/* decode ac coefs */
static void dv_decode_ac(DVVideoDecodeContext *s,
- BlockInfo *mb, INT16 *block, int last_index)
+ BlockInfo *mb, DCTELEM *block, int last_index)
{
int last_re_index;
int shift_offset = mb->shift_offset;
- const UINT8 *scan_table = mb->scan_table;
- const UINT8 *shift_table = mb->shift_table;
+ const uint8_t *scan_table = mb->scan_table;
+ const uint8_t *shift_table = mb->shift_table;
int pos = mb->pos;
int level, pos1, sign, run;
int partial_bit_count;
-
+#ifndef ALT_BITSTREAM_READER //FIXME
+ int re_index=0;
+ int re1_index=0;
+#endif
OPEN_READER(re, &s->gb);
#ifdef VLC_DEBUG
/* if we must parse a partial vlc, we do it here */
partial_bit_count = mb->partial_bit_count;
if (partial_bit_count > 0) {
- UINT8 buf[4];
- UINT32 v;
+ uint8_t buf[4];
+ uint32_t v;
int l, l1;
GetBitContext gb1;
v, partial_bit_count, (mb->partial_bit_buffer << l));
#endif
/* try to read the codeword */
- init_get_bits(&gb1, buf, 4);
+ init_get_bits(&gb1, buf, 4*8);
{
OPEN_READER(re1, &gb1);
UPDATE_CACHE(re1, &gb1);
if (pos >= 64) {
read_error:
#if defined(VLC_DEBUG) || 1
- printf("error pos=%d\n", pos);
+ fprintf(stderr, "error pos=%d\n", pos);
#endif
/* for errors, we consider the eob is reached */
mb->eob_reached = 1;
/* mb_x and mb_y are in units of 8 pixels */
static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
- UINT8 *buf_ptr1,
- const UINT16 *mb_pos_ptr)
+ uint8_t *buf_ptr1,
+ const uint16_t *mb_pos_ptr)
{
int quant, dc, dct_mode, class1, j;
int mb_index, mb_x, mb_y, v, last_index;
DCTELEM *block, *block1;
int c_offset, bits_left;
- UINT8 *y_ptr;
+ uint8_t *y_ptr;
BlockInfo mb_data[5 * 6], *mb, *mb1;
- void (*idct_put)(UINT8 *dest, int line_size, DCTELEM *block);
- UINT8 *buf_ptr;
+ void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
+ uint8_t *buf_ptr;
PutBitContext pb, vs_pb;
- UINT8 mb_bit_buffer[80 + 4]; /* allow some slack */
+ uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */
int mb_bit_count;
- UINT8 vs_bit_buffer[5 * 80 + 4]; /* allow some slack */
+ uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */
int vs_bit_count;
memset(s->block, 0, sizeof(s->block));
block = block1;
for(j = 0;j < 6; j++) {
/* NOTE: size is not important here */
- init_get_bits(&s->gb, buf_ptr, 14);
+ init_get_bits(&s->gb, buf_ptr, 14*8);
/* get the dc */
dc = get_bits(&s->gb, 9);
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
block is finished */
- bits_left = last_index - s->gb.index;
+ bits_left = last_index - get_bits_count(&s->gb);
if (mb->eob_reached) {
mb->partial_bit_count = 0;
mb_bit_count += bits_left;
/* 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;
- init_get_bits(&s->gb, mb_bit_buffer, 80);
+ init_get_bits(&s->gb, mb_bit_buffer, 80*8);
for(j = 0;j < 6; j++) {
- if (!mb->eob_reached && s->gb.index < mb_bit_count) {
+ if (!mb->eob_reached && get_bits_count(&s->gb) < mb_bit_count) {
dv_decode_ac(s, mb, block, mb_bit_count);
/* if still not finished, no need to parse other blocks */
if (!mb->eob_reached) {
/* we could not parse the current AC coefficient,
so we add the remaining bytes */
- bits_left = mb_bit_count - s->gb.index;
+ bits_left = mb_bit_count - get_bits_count(&s->gb);
if (bits_left > 0) {
mb->partial_bit_count += bits_left;
mb->partial_bit_buffer =
}
/* all blocks are finished, so the extra bytes can be used at
the video segment level */
- bits_left = mb_bit_count - s->gb.index;
+ bits_left = mb_bit_count - get_bits_count(&s->gb);
vs_bit_count += bits_left;
bit_copy(&vs_pb, &s->gb, bits_left);
next_mb:
#endif
block = &s->block[0][0];
mb = mb_data;
- init_get_bits(&s->gb, vs_bit_buffer, 5 * 80);
+ init_get_bits(&s->gb, vs_bit_buffer, 5 * 80*8);
for(mb_index = 0; mb_index < 5; mb_index++) {
for(j = 0;j < 6; j++) {
if (!mb->eob_reached) {
v = *mb_pos_ptr++;
mb_x = v & 0xff;
mb_y = v >> 8;
- y_ptr = s->current_picture[0] + (mb_y * s->linesize[0] * 8) + (mb_x * 8);
- if (s->sampling_411)
- c_offset = (mb_y * s->linesize[1] * 8) + ((mb_x >> 2) * 8);
+ y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P)
+ c_offset = (mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8);
else
- c_offset = ((mb_y >> 1) * s->linesize[1] * 8) + ((mb_x >> 1) * 8);
+ c_offset = ((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8);
for(j = 0;j < 6; j++) {
idct_put = s->idct_put[mb->dct_mode];
if (j < 4) {
- if (s->sampling_411 && mb_x < (704 / 8)) {
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
/* NOTE: at end of line, the macroblock is handled as 420 */
- idct_put(y_ptr + (j * 8), s->linesize[0], block);
+ idct_put(y_ptr + (j * 8), s->picture.linesize[0], block);
} else {
- idct_put(y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->linesize[0]),
- s->linesize[0], block);
+ idct_put(y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]),
+ s->picture.linesize[0], block);
}
} else {
- if (s->sampling_411 && mb_x >= (704 / 8)) {
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
uint8_t pixels[64], *c_ptr, *c_ptr1, *ptr;
int y, linesize;
/* NOTE: at end of line, the macroblock is handled as 420 */
idct_put(pixels, 8, block);
- linesize = s->linesize[6 - j];
- c_ptr = s->current_picture[6 - j] + c_offset;
+ linesize = s->picture.linesize[6 - j];
+ c_ptr = s->picture.data[6 - j] + c_offset;
ptr = pixels;
for(y = 0;y < 8; y++) {
/* convert to 411P */
- c_ptr1 = c_ptr + linesize;
- c_ptr1[0] = c_ptr[0] = (ptr[0] + ptr[1]) >> 1;
- c_ptr1[1] = c_ptr[1] = (ptr[2] + ptr[3]) >> 1;
- c_ptr1[2] = c_ptr[2] = (ptr[4] + ptr[5]) >> 1;
- c_ptr1[3] = c_ptr[3] = (ptr[6] + ptr[7]) >> 1;
- c_ptr += linesize * 2;
+ c_ptr1 = c_ptr + 8*linesize;
+ c_ptr[0]= ptr[0]; c_ptr1[0]= ptr[4];
+ c_ptr[1]= ptr[1]; c_ptr1[1]= ptr[5];
+ c_ptr[2]= ptr[2]; c_ptr1[2]= ptr[6];
+ c_ptr[3]= ptr[3]; c_ptr1[3]= ptr[7];
+ c_ptr += linesize;
ptr += 8;
}
} else {
/* don't ask me why they inverted Cb and Cr ! */
- idct_put(s->current_picture[6 - j] + c_offset,
- s->linesize[6 - j], block);
+ idct_put(s->picture.data[6 - j] + c_offset,
+ s->picture.linesize[6 - j], block);
}
}
block += 64;
}
}
+/* 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,
void *data, int *data_size,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
DVVideoDecodeContext *s = avctx->priv_data;
- int sct, dsf, apt, ds, nb_dif_segs, vs, size, width, height, i, packet_size;
- UINT8 *buf_ptr;
- const UINT16 *mb_pos_ptr;
- AVPicture *picture;
+ int ds, vs;
+ const uint16_t *mb_pos_ptr;
- /* parse id */
- init_get_bits(&s->gb, buf, buf_size);
- sct = get_bits(&s->gb, 3);
- if (sct != 0)
- return -1;
- skip_bits(&s->gb, 5);
- get_bits(&s->gb, 4); /* dsn (sequence number */
- get_bits(&s->gb, 1); /* fsc (channel number) */
- skip_bits(&s->gb, 3);
- get_bits(&s->gb, 8); /* dbn (diff block number 0-134) */
-
- dsf = get_bits(&s->gb, 1); /* 0 = NTSC 1 = PAL */
- if (get_bits(&s->gb, 1) != 0)
- return -1;
- skip_bits(&s->gb, 11);
- apt = get_bits(&s->gb, 3); /* apt */
-
- get_bits(&s->gb, 1); /* tf1 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap1 */
+ s->sys = dv_frame_profile(buf);
+ if (!s->sys || buf_size < s->sys->frame_size)
+ return -1; /* NOTE: we only accept several full frames */
- get_bits(&s->gb, 1); /* tf2 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap2 */
-
- get_bits(&s->gb, 1); /* tf3 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap3 */
+
+ if(s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
- /* init size */
- width = 720;
- if (dsf) {
- packet_size = PAL_FRAME_SIZE;
- height = 576;
- nb_dif_segs = 12;
- } else {
- packet_size = NTSC_FRAME_SIZE;
- height = 480;
- nb_dif_segs = 10;
- }
- /* NOTE: we only accept several full frames */
- if (buf_size < packet_size)
+ s->picture.reference = 0;
+ avctx->pix_fmt = s->sys->pix_fmt;
+ if(avctx->get_buffer(avctx, &s->picture) < 0) {
+ fprintf(stderr, "get_buffer() failed\n");
return -1;
-
- /* XXX: is it correct to assume that 420 is always used in PAL
- mode ? */
- s->sampling_411 = !dsf;
- if (s->sampling_411)
- mb_pos_ptr = dv_place_411;
- else
- mb_pos_ptr = dv_place_420;
-
- /* (re)alloc picture if needed */
- if (s->width != width || s->height != height) {
- for(i=0;i<3;i++)
- av_freep(&s->current_picture[i]);
- for(i=0;i<3;i++) {
- size = width * height;
- s->linesize[i] = width;
- if (i >= 1) {
- size >>= 2;
- s->linesize[i] >>= s->sampling_411 ? 2 : 1;
- }
- s->current_picture[i] = av_malloc(size);
- if (!s->current_picture[i])
- return -1;
- }
- s->width = width;
- s->height = height;
}
/* for each DIF segment */
- buf_ptr = buf;
- for (ds = 0; ds < nb_dif_segs; ds++) {
- buf_ptr += 6 * 80; /* skip DIF segment header */
+ 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) {
- /* skip audio block */
- buf_ptr += 80;
- }
- dv_decode_video_segment(s, buf_ptr, mb_pos_ptr);
- buf_ptr += 5 * 80;
+ 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;
}
}
emms_c();
/* return image */
- avctx->width = width;
- avctx->height = height;
- if (s->sampling_411)
- avctx->pix_fmt = PIX_FMT_YUV411P;
- else
- avctx->pix_fmt = PIX_FMT_YUV420P;
- if (dsf)
- avctx->frame_rate = 25 * FRAME_RATE_BASE;
- else
- avctx->frame_rate = 30 * FRAME_RATE_BASE;
- *data_size = sizeof(AVPicture);
- picture = data;
- for(i=0;i<3;i++) {
- picture->data[i] = s->current_picture[i];
- picture->linesize[i] = s->linesize[i];
- }
- return packet_size;
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data= s->picture;
+
+ 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)
{
- DVVideoDecodeContext *s = avctx->priv_data;
- int i;
-
- for(i=0;i<3;i++)
- av_freep(&s->current_picture[i]);
- return 0;
-}
+ DVVideoDecodeContext *s = c->priv_data;
+ const uint16_t *mb_pos_ptr;
+ int ds, vs;
-AVCodec dvvideo_decoder = {
- "dvvideo",
- CODEC_TYPE_VIDEO,
- CODEC_ID_DVVIDEO,
- sizeof(DVVideoDecodeContext),
- dvvideo_decode_init,
- NULL,
- dvvideo_decode_end,
- dvvideo_decode_frame,
- 0,
- NULL
-};
-
-typedef struct DVAudioDecodeContext {
- AVCodecContext *avctx;
- GetBitContext gb;
+ s->sys = dv_codec_profile(c);
+ if (!s->sys)
+ return -1;
+
+ c->pix_fmt = s->sys->pix_fmt;
+ s->picture = *((AVFrame *)data);
-} DVAudioDecodeContext;
+ /* 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 */
-static int dvaudio_decode_init(AVCodecContext *avctx)
-{
- // DVAudioDecodeContext *s = avctx->priv_data;
- return 0;
-}
+#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;
+ }
+ }
-/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
- 144000 bytes for PAL) */
-static int dvaudio_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- UINT8 *buf, int buf_size)
-{
- // DVAudioDecodeContext *s = avctx->priv_data;
- return buf_size;
+ emms_c();
+ return s->sys->frame_size;
}
-static int dvaudio_decode_end(AVCodecContext *avctx)
+static int dvvideo_end(AVCodecContext *avctx)
{
- // DVAudioDecodeContext *s = avctx->priv_data;
+ avcodec_default_free_buffers(avctx);
return 0;
}
-AVCodec dvaudio_decoder = {
- "dvaudio",
- CODEC_TYPE_AUDIO,
- CODEC_ID_DVAUDIO,
- sizeof(DVAudioDecodeContext),
- dvaudio_decode_init,
- NULL,
- dvaudio_decode_end,
- dvaudio_decode_frame,
- 0,
+AVCodec dvvideo_decoder = {
+ "dvvideo",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_DVVIDEO,
+ sizeof(DVVideoDecodeContext),
+ dvvideo_init,
+ dvvideo_encode_frame,
+ dvvideo_end,
+ dvvideo_decode_frame,
+ CODEC_CAP_DR1,
NULL
};
projects / ffmpeg / blobdiff