* 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;
- GetBitContext gb;
- VLC *vlc;
- int sampling_411; /* 0 = 420, 1 = 411 */
- int width, height;
- UINT8 *current_picture[3]; /* picture structure */
+ const DVprofile* sys;
AVFrame picture;
- int linesize[3];
+
+ uint8_t dv_zigzag[2][64];
+ uint8_t dv_idct_shift[2][22][64];
+
+ void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
+ void (*fdct[2])(DCTELEM *block);
+ void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
+
+ GetBitContext gb;
DCTELEM block[5*6][64] __align8;
- UINT8 dv_zigzag[2][64];
- UINT8 idct_permutation[64];
- /* XXX: move it to static storage ? */
- UINT8 dv_shift[2][22][64];
- void (*idct_put[2])(UINT8 *dest, int line_size, DCTELEM *block);
} DVVideoDecodeContext;
-#include "dvdata.h"
+#define TEX_VLC_BITS 9
+
+#ifdef DV_CODEC_TINY_TARGET
+#define DV_VLC_MAP_RUN_SIZE 15
+#define DV_VLC_MAP_LEV_SIZE 23
+#else
+#define DV_VLC_MAP_RUN_SIZE 64
+#define DV_VLC_MAP_LEV_SIZE 512
+#endif
-static VLC dv_vlc;
/* XXX: also include quantization */
static RL_VLC_ELEM *dv_rl_vlc[1];
+/* VLC encoding lookup table */
+static struct dv_vlc_pair {
+ uint32_t vlc;
+ uint8_t size;
+} (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL;
-static void dv_build_unquantize_tables(DVVideoDecodeContext *s)
+static void dv_build_unquantize_tables(DVVideoDecodeContext *s, uint8_t* perm)
{
int i, q, j;
/* NOTE: max left shift is 6 */
for(q = 0; q < 22; q++) {
- /* 88 unquant */
+ /* 88DCT */
for(i = 1; i < 64; i++) {
/* 88 table */
- j = s->idct_permutation[i];
- s->dv_shift[0][q][j] =
+ j = perm[i];
+ s->dv_idct_shift[0][q][j] =
dv_quant_shifts[q][dv_88_areas[i]] + 1;
}
- /* 248 unquant */
+ /* 248DCT */
for(i = 1; i < 64; i++) {
/* 248 table */
- s->dv_shift[1][q][i] =
- dv_quant_shifts[q][dv_248_areas[i]] + 1;
+ s->dv_idct_shift[1][q][i] =
+ dv_quant_shifts[q][dv_248_areas[i]] + 1;
}
}
}
-static int dvvideo_decode_init(AVCodecContext *avctx)
+static int dvvideo_init(AVCodecContext *avctx)
{
DVVideoDecodeContext *s = avctx->priv_data;
- MpegEncContext s2;
- static int done;
+ DSPContext dsp;
+ static int done=0;
+ int i, j;
if (!done) {
int i;
+ VLC dv_vlc;
done = 1;
+ dv_vlc_map = av_mallocz(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair));
+ if (!dv_vlc_map)
+ return -ENOMEM;
+
/* NOTE: as a trick, we use the fact the no codes are unused
to accelerate the parsing of partial codes */
init_vlc(&dv_vlc, TEX_VLC_BITS, NB_DV_VLC,
dv_vlc_len, 1, 1, dv_vlc_bits, 2, 2);
dv_rl_vlc[0] = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
+ if (!dv_rl_vlc[0]) {
+ av_free(dv_vlc_map);
+ return -ENOMEM;
+ }
for(i = 0; i < dv_vlc.table_size; i++){
int code= dv_vlc.table[i][0];
int len = dv_vlc.table[i][1];
dv_rl_vlc[0][i].level = level;
dv_rl_vlc[0][i].run = run;
}
+
+ for (i = 0; i < NB_DV_VLC - 1; i++) {
+ if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE || dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
+ continue;
+
+ if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
+ continue;
+
+ dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] <<
+ (!!dv_vlc_level[i]);
+ dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] +
+ (!!dv_vlc_level[i]);
+ }
+ for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
+#ifdef DV_CODEC_TINY_TARGET
+ for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
+ if (dv_vlc_map[i][j].size == 0) {
+ dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
+ (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
+ dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
+ dv_vlc_map[0][j].size;
+ }
+ }
+#else
+ for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
+ if (dv_vlc_map[i][j].size == 0) {
+ dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
+ (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
+ dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
+ dv_vlc_map[0][j].size;
+ }
+ dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
+ dv_vlc_map[i][j].vlc | 1;
+ dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
+ dv_vlc_map[i][j].size;
+ }
+#endif
+ }
}
- /* ugly way to get the idct & scantable */
- /* XXX: fix it */
- memset(&s2, 0, sizeof(MpegEncContext));
- s2.avctx = avctx;
- dsputil_init(&s2.dsp, avctx->dsp_mask);
- if (DCT_common_init(&s2) < 0)
- return -1;
+ /* Generic DSP setup */
+ dsputil_init(&dsp, avctx);
+ s->get_pixels = dsp.get_pixels;
- s->idct_put[0] = s2.idct_put;
- memcpy(s->idct_permutation, s2.idct_permutation, 64);
- memcpy(s->dv_zigzag[0], s2.intra_scantable.permutated, 64);
+ /* 88DCT setup */
+ s->fdct[0] = dsp.fdct;
+ s->idct_put[0] = dsp.idct_put;
+ for (i=0; i<64; i++)
+ s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
- /* XXX: use MMX also for idct248 */
- s->idct_put[1] = simple_idct248_put;
- memcpy(s->dv_zigzag[1], dv_248_zigzag, 64);
+ /* 248DCT setup */
+ s->fdct[1] = dsp.fdct248;
+ s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP
+ memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
/* XXX: do it only for constant case */
- dv_build_unquantize_tables(s);
+ dv_build_unquantize_tables(s, dsp.idct_permutation);
+
+ /* FIXME: I really don't think this should be here */
+ if (dv_codec_profile(avctx))
+ avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
+ avctx->coded_frame = &s->picture;
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
};
+/* bit budget for AC only in 5 MBs */
+static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
+/* see dv_88_areas and dv_248_areas for details */
+static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
#ifndef ALT_BITSTREAM_READER
-#error only works with ALT_BITSTREAM_READER
+#warning only works with ALT_BITSTREAM_READER
#endif
/* decode ac coefs */
{
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;
if (pos >= 64) {
read_error:
#if defined(VLC_DEBUG) || 1
- printf("error pos=%d\n", pos);
+ av_log(NULL, AV_LOG_ERROR, "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));
buf_ptr = buf_ptr1;
block1 = &s->block[0][0];
mb1 = mb_data;
- init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80, NULL, NULL);
+ init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
vs_bit_count = 0;
for(mb_index = 0; mb_index < 5; mb_index++) {
/* skip header */
quant = buf_ptr[3] & 0x0f;
buf_ptr += 4;
- init_put_bits(&pb, mb_bit_buffer, 80, NULL, NULL);
+ init_put_bits(&pb, mb_bit_buffer, 80);
mb_bit_count = 0;
mb = mb1;
block = block1;
mb->scan_table = s->dv_zigzag[dct_mode];
class1 = get_bits(&s->gb, 2);
mb->shift_offset = (class1 == 3);
- mb->shift_table = s->dv_shift[dct_mode]
+ mb->shift_table = s->dv_idct_shift[dct_mode]
[quant + dv_quant_offset[class1]];
dc = dc << 2;
/* convert to unsigned because 128 is not added in the
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*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:
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)) {
- uint8_t pixels[64], *c_ptr, *c_ptr1, *ptr;
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
+ uint64_t aligned_pixels[64/8];
+ uint8_t *pixels= (uint8_t*)aligned_pixels;
+ uint8_t *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;
}
}
+#ifdef DV_CODEC_TINY_TARGET
+/* Converts run and level (where level != 0) pair into vlc, returning bit size */
+static always_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);
-/* 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)
+ if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
+ *vlc = dv_vlc_map[run][level].vlc | sign;
+ size = dv_vlc_map[run][level].size;
+ }
+ else {
+ if (level < DV_VLC_MAP_LEV_SIZE) {
+ *vlc = dv_vlc_map[0][level].vlc | sign;
+ size = dv_vlc_map[0][level].size;
+ } else {
+ *vlc = 0xfe00 | (level << 1) | sign;
+ size = 16;
+ }
+ if (run) {
+ *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
+ (0x1f80 | (run - 1))) << size;
+ size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
+ }
+ }
+
+ return size;
+}
+
+static always_inline int dv_rl2vlc_size(int run, int l)
{
- DVVideoDecodeContext *s = avctx->priv_data;
- int sct, dsf, apt, ds, nb_dif_segs, vs, width, height, i, packet_size;
- UINT8 *buf_ptr;
- const UINT16 *mb_pos_ptr;
+ int level = (l ^ (l >> 8)) - (l >> 8);
+ int size;
- /* parse id */
- init_get_bits(&s->gb, buf, buf_size*8);
- 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 */
+ if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
+ size = dv_vlc_map[run][level].size;
+ }
+ else {
+ size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
+ if (run) {
+ size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
+ }
+ }
+ return size;
+}
+#else
+static always_inline int dv_rl2vlc(int run, int l, uint32_t* vlc)
+{
+ *vlc = dv_vlc_map[run][((uint16_t)l)&0x1ff].vlc;
+ return dv_vlc_map[run][((uint16_t)l)&0x1ff].size;
+}
+
+static always_inline int dv_rl2vlc_size(int run, int l)
+{
+ return dv_vlc_map[run][((uint16_t)l)&0x1ff].size;
+}
+#endif
- get_bits(&s->gb, 1); /* tf1 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap1 */
+typedef struct EncBlockInfo {
+ int area_q[4];
+ int bit_size[4];
+ int prev_run[4];
+ int cur_ac;
+ int cno;
+ int dct_mode;
+ DCTELEM *mb;
+ uint8_t partial_bit_count;
+ uint32_t partial_bit_buffer; /* we can't use uint16_t here */
+} EncBlockInfo;
- get_bits(&s->gb, 1); /* tf2 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap2 */
+static always_inline int dv_bits_left(PutBitContext* s)
+{
+ return (s->buf_end - s->buf) * 8 -
+ ((s->buf_ptr - s->buf) * 8 + 32 - (int64_t)s->bit_left);
+}
- get_bits(&s->gb, 1); /* tf3 */
- skip_bits(&s->gb, 4);
- get_bits(&s->gb, 3); /* ap3 */
+static always_inline void dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
+ int pb_size)
+{
+ int run;
+ int bits_left;
+ PutBitContext* pb = pb_pool;
+ int size = bi->partial_bit_count;
+ uint32_t vlc = bi->partial_bit_buffer;
- /* init size */
- width = 720;
- if (dsf) {
- avctx->frame_rate = 25 * FRAME_RATE_BASE;
- packet_size = PAL_FRAME_SIZE;
- height = 576;
- nb_dif_segs = 12;
- } else {
- avctx->frame_rate = 30 * FRAME_RATE_BASE;
- packet_size = NTSC_FRAME_SIZE;
- height = 480;
- nb_dif_segs = 10;
+ bi->partial_bit_count = bi->partial_bit_buffer = 0;
+vlc_loop:
+ /* Find suitable storage space */
+ for (; size > (bits_left = dv_bits_left(pb)); pb++) {
+ if (bits_left) {
+ size -= bits_left;
+ put_bits(pb, bits_left, vlc >> size);
+ vlc = vlc & ((1<<size)-1);
+ }
+ if (pb_size == 1) {
+ bi->partial_bit_count = size;
+ bi->partial_bit_buffer = vlc;
+ return;
+ }
+ --pb_size;
+ }
+
+ /* Store VLC */
+ put_bits(pb, size, vlc);
+
+ /* Construct the next VLC */
+ run = 0;
+ for (; bi->cur_ac < 64; bi->cur_ac++, run++) {
+ if (bi->mb[bi->cur_ac]) {
+ size = dv_rl2vlc(run, bi->mb[bi->cur_ac], &vlc);
+ bi->cur_ac++;
+ goto vlc_loop;
+ }
+ }
+
+ if (bi->cur_ac == 64) {
+ size = 4; vlc = 6; /* End Of Block stamp */
+ bi->cur_ac++;
+ goto vlc_loop;
+ }
+}
+
+static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
+ const uint8_t* zigzag_scan, int bias)
+{
+ int i, area;
+ int run;
+ int classes[] = {12, 24, 36, 0xffff};
+
+ run = 0;
+ bi->mb[0] = blk[0];
+ bi->cno = 0;
+ for (area = 0; area < 4; area++) {
+ bi->prev_run[area] = run;
+ bi->bit_size[area] = 0;
+ for (i=mb_area_start[area]; i<mb_area_start[area+1]; i++) {
+ bi->mb[i] = (blk[zigzag_scan[i]] / 16);
+ while ((bi->mb[i] ^ (bi->mb[i] >> 8)) > classes[bi->cno])
+ bi->cno++;
+
+ if (bi->mb[i]) {
+ bi->bit_size[area] += dv_rl2vlc_size(run, bi->mb[i]);
+ run = 0;
+ } else
+ ++run;
+ }
}
- /* NOTE: we only accept several full frames */
- if (buf_size < packet_size)
- return -1;
+ bi->bit_size[3] += 4; /* EOB marker */
+ bi->cno += bias;
- /* 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;
- avctx->pix_fmt = PIX_FMT_YUV411P;
- } else {
- mb_pos_ptr = dv_place_420;
- avctx->pix_fmt = PIX_FMT_YUV420P;
+ if (bi->cno >= 3) { /* FIXME: we have to recreate bit_size[], prev_run[] */
+ bi->cno = 3;
+ for (i=1; i<64; i++)
+ bi->mb[i] /= 2;
}
+}
- avctx->width = width;
- avctx->height = height;
+#define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
+static always_inline int dv_guess_dct_mode(DCTELEM *blk) {
+ DCTELEM *s;
+ int score88 = 0;
+ int score248 = 0;
+ int i;
+
+ /* Compute 8-8 score (small values give a better chance for 8-8 DCT) */
+ s = blk;
+ for(i=0; i<7; i++) {
+ score88 += SC(0, 8) + SC(1, 9) + SC(2, 10) + SC(3, 11) +
+ SC(4, 12) + SC(5,13) + SC(6, 14) + SC(7, 15);
+ s += 8;
+ }
+ /* Compute 2-4-8 score (small values give a better chance for 2-4-8 DCT) */
+ s = blk;
+ for(i=0; i<6; i++) {
+ score248 += SC(0, 16) + SC(1,17) + SC(2, 18) + SC(3, 19) +
+ SC(4, 20) + SC(5,21) + SC(6, 22) + SC(7, 23);
+ s += 8;
+ }
- s->picture.reference= 0;
- if(avctx->get_buffer(avctx, &s->picture) < 0) {
- fprintf(stderr, "get_buffer() failed\n");
- return -1;
+ return (score88 - score248 > -10);
+}
+
+static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
+{
+ int size[5];
+ int i, j, k, a, run;
+ EncBlockInfo* b;
+
+ do {
+ b = blks;
+ for (i=0; i<5; i++) {
+ if (!qnos[i])
+ continue;
+
+ qnos[i]--;
+ size[i] = 0;
+ for (j=0; j<6; j++, b++) {
+ for (a=0; a<4; a++) {
+ if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) {
+ b->bit_size[a] = (a==3)?4:0;
+ b->area_q[a]++;
+ run = b->prev_run[a];
+ for (k=mb_area_start[a]; k<mb_area_start[a+1]; k++) {
+ b->mb[k] /= 2;
+ if (b->mb[k]) {
+ b->bit_size[a] += dv_rl2vlc_size(run, b->mb[k]);
+ run = 0;
+ } else
+ ++run;
+ }
+ }
+ size[i] += b->bit_size[a];
+ }
+ }
+ }
+ } while ((vs_total_ac_bits < size[0] + size[1] + size[2] + size[3] + size[4]) &&
+ (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]));
+}
+
+/*
+ * This is a very rough initial implementaion. The performance is
+ * horrible and the weighting is missing. 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;
+ uint8_t* ptr;
+ int do_edge_wrap;
+ DCTELEM block[64] __align8;
+ EncBlockInfo enc_blks[5*6];
+ PutBitContext pbs[5*6];
+ PutBitContext* pb;
+ EncBlockInfo* enc_blk;
+ int vs_bit_size = 0;
+ int qnos[5];
+
+ enc_blk = &enc_blks[0];
+ pb = &pbs[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;
+ qnos[mb_index] = 15; /* No quantization */
+ ptr = dif + mb_index*80 + 4;
+ 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);
+ }
+
+ enc_blk->dct_mode = dv_guess_dct_mode(block);
+ enc_blk->mb = &s->block[mb_index*6+j][0];
+ enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0;
+ enc_blk->partial_bit_count = 0;
+ enc_blk->partial_bit_buffer = 0;
+ enc_blk->cur_ac = 1;
+
+ s->fdct[enc_blk->dct_mode](block);
+
+ dv_set_class_number(block, enc_blk,
+ enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct,
+ j/4*(j%2));
+
+ init_put_bits(pb, ptr, block_sizes[j]/8);
+ put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024) >> 2));
+ put_bits(pb, 1, enc_blk->dct_mode);
+ put_bits(pb, 2, enc_blk->cno);
+
+ vs_bit_size += enc_blk->bit_size[0] + enc_blk->bit_size[1] +
+ enc_blk->bit_size[2] + enc_blk->bit_size[3];
+ ++enc_blk;
+ ++pb;
+ ptr += block_sizes[j]/8;
+ }
}
- for(i=0;i<3;i++) {
- s->current_picture[i] = s->picture.data[i];
- s->linesize[i] = s->picture.linesize[i];
- if (!s->current_picture[i])
- return -1;
+ if (vs_total_ac_bits < vs_bit_size)
+ dv_guess_qnos(&enc_blks[0], &qnos[0]);
+
+ for (i=0; i<5; i++) {
+ dif[i*80 + 3] = qnos[i];
}
- s->width = width;
- s->height = height;
+
+ /* First pass over individual cells only */
+ for (j=0; j<5*6; j++)
+ dv_encode_ac(&enc_blks[j], &pbs[j], 1);
+
+ /* Second pass over each MB space */
+ for (j=0; j<5*6; j++) {
+ if (enc_blks[j].cur_ac < 65 || enc_blks[j].partial_bit_count)
+ dv_encode_ac(&enc_blks[j], &pbs[(j/6)*6], 6);
+ }
+
+ /* Third and final pass over the whole vides segment space */
+ for (j=0; j<5*6; j++) {
+ if (enc_blks[j].cur_ac < 65 || enc_blks[j].partial_bit_count)
+ dv_encode_ac(&enc_blks[j], &pbs[0], 6*5);
+ }
+
+ for (j=0; j<5*6; j++)
+ flush_put_bits(&pbs[j]);
+}
+
+/* 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_t *buf, int buf_size)
+{
+ DVVideoDecodeContext *s = avctx->priv_data;
+ int ds, vs;
+ const uint16_t *mb_pos_ptr;
+
+ s->sys = dv_frame_profile(buf);
+ if (!s->sys || buf_size < s->sys->frame_size)
+ return -1; /* NOTE: we only accept several full frames */
+
+
+ if(s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+
+ s->picture.reference = 0;
+ avctx->pix_fmt = s->sys->pix_fmt;
+ avctx->width = s->sys->width;
+ avctx->height = s->sys->height;
+ if(avctx->get_buffer(avctx, &s->picture) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+ s->picture.interlaced_frame = 1;
+ s->picture.top_field_first = 0;
/* 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;
}
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data= s->picture;
- avctx->release_buffer(avctx, &s->picture);
-
- return packet_size;
+ 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;
+ 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;
- if(avctx->get_buffer == avcodec_default_get_buffer){
- for(i=0; i<4; i++){
- av_freep(&s->picture.base[i]);
- s->picture.data[i]= NULL;
+ 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;
}
- av_freep(&s->picture.opaque);
}
+ emms_c();
+ return s->sys->frame_size;
+}
+
+static int dvvideo_end(AVCodecContext *avctx)
+{
+ avcodec_default_free_buffers(avctx);
return 0;
}
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
};
-
-typedef struct DVAudioDecodeContext {
- AVCodecContext *avctx;
- GetBitContext gb;
-
-} DVAudioDecodeContext;
-
-static int dvaudio_decode_init(AVCodecContext *avctx)
-{
- // DVAudioDecodeContext *s = avctx->priv_data;
- return 0;
-}
-
-/* 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;
-}
-
-static int dvaudio_decode_end(AVCodecContext *avctx)
-{
- // DVAudioDecodeContext *s = avctx->priv_data;
- 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,
- NULL
-};
projects / ffmpeg / blobdiff