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ffmpeg.wasm-core
Commit 170fb593 authored by Luca Barbato's avatar Luca Barbato
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pcx: K&R formatting cosmetics

parent ef5b70af
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Showing with 59 additions and 57 deletions
libavcodec/pcx.c
View file @ 170fb593
......@@ -32,19 +32,21 @@
* @return advanced src pointer
*/
static const uint8_t *pcx_rle_decode(const uint8_t *src, uint8_t *dst,
unsigned int bytes_per_scanline, int compressed) {
unsigned int bytes_per_scanline,
int compressed)
{
unsigned int i = 0;
unsigned char run, value;
if (compressed) {
while (i<bytes_per_scanline) {
run = 1;
while (i < bytes_per_scanline) {
run = 1;
value = *src++;
if (value >= 0xc0) {
run = value & 0x3f;
run = value & 0x3f;
value = *src++;
}
while (i<bytes_per_scanline && run--)
while (i < bytes_per_scanline && run--)
dst[i++] = value;
}
} else {
......@@ -55,20 +57,23 @@ static const uint8_t *pcx_rle_decode(const uint8_t *src, uint8_t *dst,
return src;
}
static void pcx_palette(const uint8_t **src, uint32_t *dst, unsigned int pallen) {
static void pcx_palette(const uint8_t **src, uint32_t *dst,
unsigned int pallen)
{
unsigned int i;
for (i=0; i<pallen; i++)
for (i = 0; i < pallen; i++)
*dst++ = bytestream_get_be24(src);
if (pallen < 256)
memset(dst, 0, (256 - pallen) * sizeof(*dst));
}
static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt) {
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AVFrame * const p = data;
int buf_size = avpkt->size;
AVFrame *const p = data;
int compressed, xmin, ymin, xmax, ymax;
unsigned int w, h, bits_per_pixel, bytes_per_line, nplanes, stride, y, x,
bytes_per_scanline;
......@@ -83,10 +88,10 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
}
compressed = buf[2];
xmin = AV_RL16(buf+ 4);
ymin = AV_RL16(buf+ 6);
xmax = AV_RL16(buf+ 8);
ymax = AV_RL16(buf+10);
xmin = AV_RL16(buf + 4);
ymin = AV_RL16(buf + 6);
xmax = AV_RL16(buf + 8);
ymax = AV_RL16(buf + 10);
if (xmax < xmin || ymax < ymin) {
av_log(avctx, AV_LOG_ERROR, "invalid image dimensions\n");
......@@ -97,7 +102,7 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
h = ymax - ymin + 1;
bits_per_pixel = buf[3];
bytes_per_line = AV_RL16(buf+66);
bytes_per_line = AV_RL16(buf + 66);
nplanes = buf[65];
bytes_per_scanline = nplanes * bytes_per_line;
......@@ -106,22 +111,22 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
return AVERROR_INVALIDDATA;
}
switch ((nplanes<<8) + bits_per_pixel) {
case 0x0308:
avctx->pix_fmt = AV_PIX_FMT_RGB24;
break;
case 0x0108:
case 0x0104:
case 0x0102:
case 0x0101:
case 0x0401:
case 0x0301:
case 0x0201:
avctx->pix_fmt = AV_PIX_FMT_PAL8;
break;
default:
av_log(avctx, AV_LOG_ERROR, "invalid PCX file\n");
return AVERROR_INVALIDDATA;
switch ((nplanes << 8) + bits_per_pixel) {
case 0x0308:
avctx->pix_fmt = AV_PIX_FMT_RGB24;
break;
case 0x0108:
case 0x0104:
case 0x0102:
case 0x0101:
case 0x0401:
case 0x0301:
case 0x0201:
avctx->pix_fmt = AV_PIX_FMT_PAL8;
break;
default:
av_log(avctx, AV_LOG_ERROR, "invalid PCX file\n");
return AVERROR_INVALIDDATA;
}
buf += 128;
......@@ -145,22 +150,21 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
return AVERROR(ENOMEM);
if (nplanes == 3 && bits_per_pixel == 8) {
for (y=0; y<h; y++) {
for (y = 0; y < h; y++) {
buf = pcx_rle_decode(buf, scanline, bytes_per_scanline, compressed);
for (x=0; x<w; x++) {
ptr[3*x ] = scanline[x ];
ptr[3*x+1] = scanline[x+ bytes_per_line ];
ptr[3*x+2] = scanline[x+(bytes_per_line<<1)];
for (x = 0; x < w; x++) {
ptr[3 * x] = scanline[x];
ptr[3 * x + 1] = scanline[x + bytes_per_line];
ptr[3 * x + 2] = scanline[x + (bytes_per_line << 1)];
}
ptr += stride;
}
} else if (nplanes == 1 && bits_per_pixel == 8) {
const uint8_t *palstart = bufstart + buf_size - 769;
for (y=0; y<h; y++, ptr+=stride) {
for (y = 0; y < h; y++, ptr += stride) {
buf = pcx_rle_decode(buf, scanline, bytes_per_scanline, compressed);
memcpy(ptr, scanline, w);
}
......@@ -173,31 +177,29 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
av_log(avctx, AV_LOG_ERROR, "expected palette after image data\n");
goto end;
}
} else if (nplanes == 1) { /* all packed formats, max. 16 colors */
GetBitContext s;
for (y=0; y<h; y++) {
init_get_bits(&s, scanline, bytes_per_scanline<<3);
for (y = 0; y < h; y++) {
init_get_bits(&s, scanline, bytes_per_scanline << 3);
buf = pcx_rle_decode(buf, scanline, bytes_per_scanline, compressed);
for (x=0; x<w; x++)
for (x = 0; x < w; x++)
ptr[x] = get_bits(&s, bits_per_pixel);
ptr += stride;
}
} else { /* planar, 4, 8 or 16 colors */
int i;
for (y=0; y<h; y++) {
for (y = 0; y < h; y++) {
buf = pcx_rle_decode(buf, scanline, bytes_per_scanline, compressed);
for (x=0; x<w; x++) {
int m = 0x80 >> (x&7), v = 0;
for (i=nplanes - 1; i>=0; i--) {
for (x = 0; x < w; x++) {
int m = 0x80 >> (x & 7), v = 0;
for (i = nplanes - 1; i >= 0; i--) {
v <<= 1;
v += !!(scanline[i*bytes_per_line + (x>>3)] & m);
v += !!(scanline[i * bytes_per_line + (x >> 3)] & m);
}
ptr[x] = v;
}
......@@ -206,10 +208,10 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
}
if (nplanes == 1 && bits_per_pixel == 8) {
pcx_palette(&buf, (uint32_t *) p->data[1], 256);
pcx_palette(&buf, (uint32_t *)p->data[1], 256);
} else if (bits_per_pixel < 8) {
const uint8_t *palette = bufstart+16;
pcx_palette(&palette, (uint32_t *) p->data[1], 16);
const uint8_t *palette = bufstart + 16;
pcx_palette(&palette, (uint32_t *)p->data[1], 16);
}
*got_frame = 1;
......@@ -221,10 +223,10 @@ end:
}
AVCodec ff_pcx_decoder = {
.name = "pcx",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PCX,
.decode = pcx_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("PC Paintbrush PCX image"),
.name = "pcx",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PCX,
.decode = pcx_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("PC Paintbrush PCX image"),
};
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