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cosmetics: K&R coding style and more whitespace for Flash Screen Video

tags/n0.8
Diego Biurrun 14 years ago
parent
2441003d3f
commit
293fe6da01
2 changed files with 121 additions and 121 deletions
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  1. +54
    -61
      libavcodec/flashsv.c
  2. +67
    -60
      libavcodec/flashsvenc.c

+ 54
- 61
libavcodec/flashsv.c View File

@@ -49,32 +49,30 @@


#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <zlib.h>


#include "avcodec.h" #include "avcodec.h"
#include "get_bits.h" #include "get_bits.h"


#include <zlib.h>

typedef struct FlashSVContext { typedef struct FlashSVContext {
AVCodecContext *avctx; AVCodecContext *avctx;
AVFrame frame;
int image_width, image_height;
int block_width, block_height;
uint8_t* tmpblock;
int block_size;
z_stream zstream;
AVFrame frame;
int image_width, image_height;
int block_width, block_height;
uint8_t *tmpblock;
int block_size;
z_stream zstream;
} FlashSVContext; } FlashSVContext;




static void copy_region(uint8_t *sptr, uint8_t *dptr, static void copy_region(uint8_t *sptr, uint8_t *dptr,
int dx, int dy, int h, int w, int stride)
int dx, int dy, int h, int w, int stride)
{ {
int i; int i;


for (i = dx+h; i > dx; i--)
{
memcpy(dptr+(i*stride)+dy*3, sptr, w*3);
sptr += w*3;
for (i = dx + h; i > dx; i--) {
memcpy(dptr + (i * stride) + dy * 3, sptr, w * 3);
sptr += w * 3;
} }
} }


@@ -84,9 +82,9 @@ static av_cold int flashsv_decode_init(AVCodecContext *avctx)
FlashSVContext *s = avctx->priv_data; FlashSVContext *s = avctx->priv_data;
int zret; // Zlib return code int zret; // Zlib return code


s->avctx = avctx;
s->avctx = avctx;
s->zstream.zalloc = Z_NULL; s->zstream.zalloc = Z_NULL;
s->zstream.zfree = Z_NULL;
s->zstream.zfree = Z_NULL;
s->zstream.opaque = Z_NULL; s->zstream.opaque = Z_NULL;
zret = inflateInit(&(s->zstream)); zret = inflateInit(&(s->zstream));
if (zret != Z_OK) { if (zret != Z_OK) {
@@ -100,13 +98,12 @@ static av_cold int flashsv_decode_init(AVCodecContext *avctx)
} }




static int flashsv_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *avpkt)
{ {
const uint8_t *buf = avpkt->data; const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
FlashSVContext *s = avctx->priv_data;
int buf_size = avpkt->size;
FlashSVContext *s = avctx->priv_data;
int h_blocks, v_blocks, h_part, v_part, i, j; int h_blocks, v_blocks, h_part, v_part, i, j;
GetBitContext gb; GetBitContext gb;


@@ -119,66 +116,64 @@ static int flashsv_decode_frame(AVCodecContext *avctx,
init_get_bits(&gb, buf, buf_size * 8); init_get_bits(&gb, buf, buf_size * 8);


/* start to parse the bitstream */ /* start to parse the bitstream */
s->block_width = 16* (get_bits(&gb, 4)+1);
s->image_width = get_bits(&gb,12);
s->block_height= 16* (get_bits(&gb, 4)+1);
s->image_height= get_bits(&gb,12);
s->block_width = 16 * (get_bits(&gb, 4) + 1);
s->image_width = get_bits(&gb, 12);
s->block_height = 16 * (get_bits(&gb, 4) + 1);
s->image_height = get_bits(&gb, 12);


/* calculate amount of blocks and the size of the border blocks */ /* calculate amount of blocks and the size of the border blocks */
h_blocks = s->image_width / s->block_width;
h_part = s->image_width % s->block_width;
h_blocks = s->image_width / s->block_width;
h_part = s->image_width % s->block_width;
v_blocks = s->image_height / s->block_height; v_blocks = s->image_height / s->block_height;
v_part = s->image_height % s->block_height;
v_part = s->image_height % s->block_height;


/* the block size could change between frames, make sure the buffer /* the block size could change between frames, make sure the buffer
* is large enough, if not, get a larger one */ * is large enough, if not, get a larger one */
if(s->block_size < s->block_width*s->block_height) {
if (s->block_size < s->block_width * s->block_height) {
av_free(s->tmpblock); av_free(s->tmpblock);
if ((s->tmpblock = av_malloc(3*s->block_width*s->block_height)) == NULL) {
if ((s->tmpblock = av_malloc(3 * s->block_width * s->block_height)) == NULL) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
return -1; return -1;
} }
} }
s->block_size = s->block_width*s->block_height;
s->block_size = s->block_width * s->block_height;


/* init the image size once */ /* init the image size once */
if((avctx->width==0) && (avctx->height==0)){
avctx->width = s->image_width;
if ((avctx->width == 0) && (avctx->height == 0)) {
avctx->width = s->image_width;
avctx->height = s->image_height; avctx->height = s->image_height;
} }


/* check for changes of image width and image height */ /* check for changes of image width and image height */
if ((avctx->width != s->image_width) || (avctx->height != s->image_height)) { if ((avctx->width != s->image_width) || (avctx->height != s->image_height)) {
av_log(avctx, AV_LOG_ERROR, "Frame width or height differs from first frames!\n"); av_log(avctx, AV_LOG_ERROR, "Frame width or height differs from first frames!\n");
av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n",avctx->height,
avctx->width,s->image_height,s->image_width);
av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n", avctx->height,
avctx->width,s->image_height, s->image_width);
return -1; return -1;
} }


av_log(avctx, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n", av_log(avctx, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
s->image_width, s->image_height, s->block_width, s->block_height,
h_blocks, v_blocks, h_part, v_part);
s->image_width, s->image_height, s->block_width, s->block_height,
h_blocks, v_blocks, h_part, v_part);


s->frame.reference = 1;
s->frame.reference = 1;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if(avctx->reget_buffer(avctx, &s->frame) < 0){
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
if (avctx->reget_buffer(avctx, &s->frame) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
} }


/* loop over all block columns */ /* loop over all block columns */
for (j = 0; j < v_blocks + (v_part?1:0); j++)
{
for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {


int hp = j*s->block_height; // horiz position in frame
int hs = (j<v_blocks)?s->block_height:v_part; // size of block
int hp = j * s->block_height; // horiz position in frame
int hs = (j < v_blocks) ? s->block_height : v_part; // size of block




/* loop over all block rows */ /* loop over all block rows */
for (i = 0; i < h_blocks + (h_part?1:0); i++)
{
int wp = i*s->block_width; // vert position in frame
int ws = (i<h_blocks)?s->block_width:h_part; // size of block
for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
int wp = i * s->block_width; // vert position in frame
int ws = (i < h_blocks) ? s->block_width : h_part; // size of block


/* get the size of the compressed zlib chunk */ /* get the size of the compressed zlib chunk */
int size = get_bits(&gb, 16); int size = get_bits(&gb, 16);
@@ -193,30 +188,28 @@ static int flashsv_decode_frame(AVCodecContext *avctx,
} else { } else {
/* decompress block */ /* decompress block */
int ret = inflateReset(&(s->zstream)); int ret = inflateReset(&(s->zstream));
if (ret != Z_OK)
{
if (ret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", i, j); av_log(avctx, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", i, j);
/* return -1; */ /* return -1; */
} }
s->zstream.next_in = buf+(get_bits_count(&gb)/8);
s->zstream.avail_in = size;
s->zstream.next_out = s->tmpblock;
s->zstream.next_in = buf + (get_bits_count(&gb) / 8);
s->zstream.avail_in = size;
s->zstream.next_out = s->tmpblock;
s->zstream.avail_out = s->block_size*3; s->zstream.avail_out = s->block_size*3;
ret = inflate(&(s->zstream), Z_FINISH); ret = inflate(&(s->zstream), Z_FINISH);
if (ret == Z_DATA_ERROR)
{
if (ret == Z_DATA_ERROR) {
av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n"); av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
inflateSync(&(s->zstream)); inflateSync(&(s->zstream));
ret = inflate(&(s->zstream), Z_FINISH); ret = inflate(&(s->zstream), Z_FINISH);
} }


if ((ret != Z_OK) && (ret != Z_STREAM_END))
{
if ((ret != Z_OK) && (ret != Z_STREAM_END)) {
av_log(avctx, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", i, j, ret); av_log(avctx, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", i, j, ret);
/* return -1; */ /* return -1; */
} }
copy_region(s->tmpblock, s->frame.data[0], s->image_height-(hp+hs+1), wp, hs, ws, s->frame.linesize[0]);
skip_bits_long(&gb, 8*size); /* skip the consumed bits */
copy_region(s->tmpblock, s->frame.data[0], s->image_height - (hp + hs + 1),
wp, hs, ws, s->frame.linesize[0]);
skip_bits_long(&gb, 8 * size); /* skip the consumed bits */
} }
} }
} }
@@ -224,9 +217,9 @@ static int flashsv_decode_frame(AVCodecContext *avctx,
*data_size = sizeof(AVFrame); *data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame; *(AVFrame*)data = s->frame;


if ((get_bits_count(&gb)/8) != buf_size)
if ((get_bits_count(&gb) / 8) != buf_size)
av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n", av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
buf_size, (get_bits_count(&gb)/8));
buf_size, (get_bits_count(&gb) / 8));


/* report that the buffer was completely consumed */ /* report that the buffer was completely consumed */
return buf_size; return buf_size;


+ 67
- 60
libavcodec/flashsvenc.c View File

@@ -65,32 +65,33 @@


typedef struct FlashSVContext { typedef struct FlashSVContext {
AVCodecContext *avctx; AVCodecContext *avctx;
uint8_t *previous_frame;
AVFrame frame;
int image_width, image_height;
int block_width, block_height;
uint8_t* tmpblock;
uint8_t* encbuffer;
int block_size;
z_stream zstream;
int last_key_frame;
uint8_t *previous_frame;
AVFrame frame;
int image_width, image_height;
int block_width, block_height;
uint8_t *tmpblock;
uint8_t *encbuffer;
int block_size;
z_stream zstream;
int last_key_frame;
} FlashSVContext; } FlashSVContext;


static int copy_region_enc(uint8_t *sptr, uint8_t *dptr,
int dx, int dy, int h, int w, int stride, uint8_t *pfptr) {
int i,j;
static int copy_region_enc(uint8_t *sptr, uint8_t *dptr, int dx, int dy,
int h, int w, int stride, uint8_t *pfptr)
{
int i, j;
uint8_t *nsptr; uint8_t *nsptr;
uint8_t *npfptr; uint8_t *npfptr;
int diff = 0; int diff = 0;


for (i = dx+h; i > dx; i--) {
nsptr = sptr+(i*stride)+dy*3;
npfptr = pfptr+(i*stride)+dy*3;
for (j=0 ; j<w*3 ; j++) {
diff |=npfptr[j]^nsptr[j];
dptr[j] = nsptr[j];
for (i = dx + h; i > dx; i--) {
nsptr = sptr + (i * stride) + dy * 3;
npfptr = pfptr + (i * stride) + dy * 3;
for (j = 0; j < w * 3; j++) {
diff |= npfptr[j] ^ nsptr[j];
dptr[j] = nsptr[j];
} }
dptr += w*3;
dptr += w * 3;
} }
if (diff) if (diff)
return 1; return 1;
@@ -111,13 +112,13 @@ static av_cold int flashsv_encode_init(AVCodecContext *avctx)
// Needed if zlib unused or init aborted before deflateInit // Needed if zlib unused or init aborted before deflateInit
memset(&(s->zstream), 0, sizeof(z_stream)); memset(&(s->zstream), 0, sizeof(z_stream));


s->last_key_frame=0;
s->last_key_frame = 0;


s->image_width = avctx->width;
s->image_width = avctx->width;
s->image_height = avctx->height; s->image_height = avctx->height;


s->tmpblock = av_mallocz(3*256*256);
s->encbuffer = av_mallocz(s->image_width*s->image_height*3);
s->tmpblock = av_mallocz(3 * 256 * 256);
s->encbuffer = av_mallocz(s->image_width * s->image_height * 3);


if (!s->tmpblock || !s->encbuffer) { if (!s->tmpblock || !s->encbuffer) {
av_log(avctx, AV_LOG_ERROR, "Memory allocation failed.\n"); av_log(avctx, AV_LOG_ERROR, "Memory allocation failed.\n");
@@ -128,64 +129,67 @@ static av_cold int flashsv_encode_init(AVCodecContext *avctx)
} }




static int encode_bitstream(FlashSVContext *s, AVFrame *p, uint8_t *buf, int buf_size,
int block_width, int block_height, uint8_t *previous_frame, int* I_frame) {
static int encode_bitstream(FlashSVContext *s, AVFrame *p, uint8_t *buf,
int buf_size, int block_width, int block_height,
uint8_t *previous_frame, int *I_frame)
{


PutBitContext pb; PutBitContext pb;
int h_blocks, v_blocks, h_part, v_part, i, j; int h_blocks, v_blocks, h_part, v_part, i, j;
int buf_pos, res; int buf_pos, res;
int pred_blocks = 0; int pred_blocks = 0;


init_put_bits(&pb, buf, buf_size*8);
init_put_bits(&pb, buf, buf_size * 8);


put_bits(&pb, 4, (block_width/16)-1);
put_bits(&pb, 4, (block_width / 16) - 1);
put_bits(&pb, 12, s->image_width); put_bits(&pb, 12, s->image_width);
put_bits(&pb, 4, (block_height/16)-1);
put_bits(&pb, 4, (block_height / 16) - 1);
put_bits(&pb, 12, s->image_height); put_bits(&pb, 12, s->image_height);
flush_put_bits(&pb); flush_put_bits(&pb);
buf_pos=4;
buf_pos = 4;


h_blocks = s->image_width / block_width;
h_part = s->image_width % block_width;
h_blocks = s->image_width / block_width;
h_part = s->image_width % block_width;
v_blocks = s->image_height / block_height; v_blocks = s->image_height / block_height;
v_part = s->image_height % block_height;
v_part = s->image_height % block_height;


/* loop over all block columns */ /* loop over all block columns */
for (j = 0; j < v_blocks + (v_part?1:0); j++)
{
for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {


int hp = j*block_height; // horiz position in frame
int hs = (j<v_blocks)?block_height:v_part; // size of block
int hp = j * block_height; // horiz position in frame
int hs = (j < v_blocks) ? block_height : v_part; // size of block


/* loop over all block rows */ /* loop over all block rows */
for (i = 0; i < h_blocks + (h_part?1:0); i++)
{
int wp = i*block_width; // vert position in frame
int ws = (i<h_blocks)?block_width:h_part; // size of block
int ret=Z_OK;
for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
int wp = i * block_width; // vert position in frame
int ws = (i < h_blocks) ? block_width : h_part; // size of block
int ret = Z_OK;
uint8_t *ptr; uint8_t *ptr;


ptr = buf+buf_pos;
ptr = buf + buf_pos;


//copy the block to the temp buffer before compression (if it differs from the previous frame's block)
res = copy_region_enc(p->data[0], s->tmpblock, s->image_height-(hp+hs+1), wp, hs, ws, p->linesize[0], previous_frame);
/* copy the block to the temp buffer before compression
* (if it differs from the previous frame's block) */
res = copy_region_enc(p->data[0], s->tmpblock,
s->image_height - (hp + hs + 1),
wp, hs, ws, p->linesize[0], previous_frame);


if (res || *I_frame) { if (res || *I_frame) {
unsigned long zsize; unsigned long zsize;
zsize = 3*block_width*block_height;
ret = compress2(ptr+2, &zsize, s->tmpblock, 3*ws*hs, 9);
zsize = 3 * block_width * block_height;
ret = compress2(ptr + 2, &zsize, s->tmpblock, 3 * ws * hs, 9);




//ret = deflateReset(&(s->zstream)); //ret = deflateReset(&(s->zstream));
if (ret != Z_OK) if (ret != Z_OK)
av_log(s->avctx, AV_LOG_ERROR, "error while compressing block %dx%d\n", i, j); av_log(s->avctx, AV_LOG_ERROR, "error while compressing block %dx%d\n", i, j);


bytestream_put_be16(&ptr,(unsigned int)zsize);
buf_pos += zsize+2;
bytestream_put_be16(&ptr, (unsigned int) zsize);
buf_pos += zsize + 2;
//av_log(avctx, AV_LOG_ERROR, "buf_pos = %d\n", buf_pos); //av_log(avctx, AV_LOG_ERROR, "buf_pos = %d\n", buf_pos);
} else { } else {
pred_blocks++; pred_blocks++;
bytestream_put_be16(&ptr,0);
bytestream_put_be16(&ptr, 0);
buf_pos += 2; buf_pos += 2;
} }
} }
@@ -200,7 +204,8 @@ static int encode_bitstream(FlashSVContext *s, AVFrame *p, uint8_t *buf, int buf
} }




static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void *data)
static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf,
int buf_size, void *data)
{ {
FlashSVContext * const s = avctx->priv_data; FlashSVContext * const s = avctx->priv_data;
AVFrame *pict = data; AVFrame *pict = data;
@@ -214,7 +219,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_siz


/* First frame needs to be a keyframe */ /* First frame needs to be a keyframe */
if (avctx->frame_number == 0) { if (avctx->frame_number == 0) {
s->previous_frame = av_mallocz(FFABS(p->linesize[0])*s->image_height);
s->previous_frame = av_mallocz(FFABS(p->linesize[0]) * s->image_height);
if (!s->previous_frame) { if (!s->previous_frame) {
av_log(avctx, AV_LOG_ERROR, "Memory allocation failed.\n"); av_log(avctx, AV_LOG_ERROR, "Memory allocation failed.\n");
return -1; return -1;
@@ -223,7 +228,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_siz
} }


if (p->linesize[0] < 0) if (p->linesize[0] < 0)
pfptr = s->previous_frame - ((s->image_height-1) * p->linesize[0]);
pfptr = s->previous_frame - ((s->image_height - 1) * p->linesize[0]);
else else
pfptr = s->previous_frame; pfptr = s->previous_frame;


@@ -234,29 +239,31 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_siz
} }
} }


opt_w=4;
opt_h=4;
opt_w = 4;
opt_h = 4;


if (buf_size < s->image_width*s->image_height*3) { if (buf_size < s->image_width*s->image_height*3) {
//Conservative upper bound check for compressed data //Conservative upper bound check for compressed data
av_log(avctx, AV_LOG_ERROR, "buf_size %d < %d\n", buf_size, s->image_width*s->image_height*3);
av_log(avctx, AV_LOG_ERROR, "buf_size %d < %d\n",
buf_size, s->image_width * s->image_height * 3);
return -1; return -1;
} }


res = encode_bitstream(s, p, buf, buf_size, opt_w*16, opt_h*16, pfptr, &I_frame);
res = encode_bitstream(s, p, buf, buf_size, opt_w * 16, opt_h * 16, pfptr, &I_frame);


//save the current frame //save the current frame
if(p->linesize[0] > 0)
memcpy(s->previous_frame, p->data[0], s->image_height*p->linesize[0]);
if (p->linesize[0] > 0)
memcpy(s->previous_frame, p->data[0], s->image_height * p->linesize[0]);
else else
memcpy(s->previous_frame, p->data[0] + p->linesize[0] * (s->image_height-1), s->image_height*FFABS(p->linesize[0]));
memcpy(s->previous_frame, p->data[0] + p->linesize[0] * (s->image_height - 1),
s->image_height * FFABS(p->linesize[0]));


//mark the frame type so the muxer can mux it correctly //mark the frame type so the muxer can mux it correctly
if (I_frame) { if (I_frame) {
p->pict_type = FF_I_TYPE; p->pict_type = FF_I_TYPE;
p->key_frame = 1; p->key_frame = 1;
s->last_key_frame = avctx->frame_number; s->last_key_frame = avctx->frame_number;
av_log(avctx, AV_LOG_DEBUG, "Inserting key frame at frame %d\n",avctx->frame_number);
av_log(avctx, AV_LOG_DEBUG, "Inserting key frame at frame %d\n", avctx->frame_number);
} else { } else {
p->pict_type = FF_P_TYPE; p->pict_type = FF_P_TYPE;
p->key_frame = 0; p->key_frame = 0;


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