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ffmpeg.wasm-core
Commit fcae3ff1 authored by Luca Barbato's avatar Luca Barbato
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dsicinav: K&R formatting cosmetics

parent 6756d98c
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Inline Side-by-side
Showing with 61 additions and 50 deletions
libavcodec/dsicinav.c
View file @ fcae3ff1
......@@ -108,27 +108,30 @@ static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
return 0;
}
static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst,
int size)
{
while (size--)
*dst++ += *src++;
}
static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
static int cin_decode_huffman(const unsigned char *src, int src_size,
unsigned char *dst, int dst_size)
{
int b, huff_code = 0;
unsigned char huff_code_table[15];
unsigned char *dst_cur = dst;
unsigned char *dst_end = dst + dst_size;
unsigned char *dst_cur = dst;
unsigned char *dst_end = dst + dst_size;
const unsigned char *src_end = src + src_size;
memcpy(huff_code_table, src, 15); src += 15;
memcpy(huff_code_table, src, 15);
src += 15;
while (src < src_end) {
huff_code = *src++;
if ((huff_code >> 4) == 15) {
b = huff_code << 4;
huff_code = *src++;
b = huff_code << 4;
huff_code = *src++;
*dst_cur++ = b | (huff_code >> 4);
} else
*dst_cur++ = huff_code_table[huff_code >> 4];
......@@ -147,11 +150,12 @@ static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned c
return dst_cur - dst;
}
static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
static int cin_decode_lzss(const unsigned char *src, int src_size,
unsigned char *dst, int dst_size)
{
uint16_t cmd;
int i, sz, offset, code;
unsigned char *dst_end = dst + dst_size, *dst_start = dst;
unsigned char *dst_end = dst + dst_size, *dst_start = dst;
const unsigned char *src_end = src + src_size;
while (src < src_end && dst < dst_end) {
......@@ -160,13 +164,15 @@ static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char
if (code & (1 << i)) {
*dst++ = *src++;
} else {
cmd = AV_RL16(src); src += 2;
cmd = AV_RL16(src);
src += 2;
offset = cmd >> 4;
if ((int) (dst - dst_start) < offset + 1)
if ((int)(dst - dst_start) < offset + 1)
return AVERROR_INVALIDDATA;
sz = (cmd & 0xF) + 2;
/* don't use memcpy/memmove here as the decoding routine (ab)uses */
/* buffer overlappings to repeat bytes in the destination */
/* don't use memcpy/memmove here as the decoding routine
* (ab)uses buffer overlappings to repeat bytes in the
* destination */
sz = FFMIN(sz, dst_end - dst);
while (sz--) {
*dst = *(dst - offset - 1);
......@@ -179,10 +185,11 @@ static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char
return 0;
}
static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
static void cin_decode_rle(const unsigned char *src, int src_size,
unsigned char *dst, int dst_size)
{
int len, code;
unsigned char *dst_end = dst + dst_size;
unsigned char *dst_end = dst + dst_size;
const unsigned char *src_end = src + src_size;
while (src < src_end && dst < dst_end) {
......@@ -203,15 +210,16 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
CinVideoContext *cin = avctx->priv_data;
int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size, res = 0;
int i, y, palette_type, palette_colors_count,
bitmap_frame_type, bitmap_frame_size, res = 0;
palette_type = buf[0];
palette_colors_count = AV_RL16(buf+1);
bitmap_frame_type = buf[3];
buf += 4;
palette_type = buf[0];
palette_colors_count = AV_RL16(buf + 1);
bitmap_frame_type = buf[3];
buf += 4;
bitmap_frame_size = buf_size - 4;
......@@ -222,46 +230,48 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
if (palette_colors_count > 256)
return AVERROR_INVALIDDATA;
for (i = 0; i < palette_colors_count; ++i) {
cin->palette[i] = bytestream_get_le24(&buf);
cin->palette[i] = bytestream_get_le24(&buf);
bitmap_frame_size -= 3;
}
} else {
for (i = 0; i < palette_colors_count; ++i) {
cin->palette[buf[0]] = AV_RL24(buf+1);
buf += 4;
bitmap_frame_size -= 4;
cin->palette[buf[0]] = AV_RL24(buf + 1);
buf += 4;
bitmap_frame_size -= 4;
}
}
/* note: the decoding routines below assumes that surface.width = surface.pitch */
/* note: the decoding routines below assumes that
* surface.width = surface.pitch */
switch (bitmap_frame_type) {
case 9:
cin_decode_rle(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 34:
cin_decode_rle(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 35:
cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 36:
bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_INT_BMP],
cin->bitmap_size);
cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 37:
cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 38:
res = cin_decode_lzss(buf, bitmap_frame_size,
......@@ -277,12 +287,13 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
if (res < 0)
return res;
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
}
if ((res = ff_reget_buffer(avctx, &cin->frame)) < 0) {
av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
av_log(cin->avctx, AV_LOG_ERROR,
"delphinecinvideo: reget_buffer() failed to allocate a frame\n");
return res;
}
......@@ -290,10 +301,11 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
cin->frame.palette_has_changed = 1;
for (y = 0; y < cin->avctx->height; ++y)
memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
cin->avctx->width);
cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
cin->avctx->width);
FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
cin->bitmap_table[CIN_PRE_BMP]);
if ((res = av_frame_ref(data, &cin->frame)) < 0)
return res;
......@@ -332,9 +344,9 @@ static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
CinAudioContext *cin = avctx->priv_data;
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
CinAudioContext *cin = avctx->priv_data;
const uint8_t *buf_end = buf + avpkt->size;
int16_t *samples;
int delta, ret;
......@@ -350,13 +362,13 @@ static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
delta = cin->delta;
if (cin->initial_decode_frame) {
cin->initial_decode_frame = 0;
delta = sign_extend(AV_RL16(buf), 16);
buf += 2;
*samples++ = delta;
delta = sign_extend(AV_RL16(buf), 16);
buf += 2;
*samples++ = delta;
}
while (buf < buf_end) {
delta += cinaudio_delta16_table[*buf++];
delta = av_clip_int16(delta);
delta += cinaudio_delta16_table[*buf++];
delta = av_clip_int16(delta);
*samples++ = delta;
}
cin->delta = delta;
......@@ -366,7 +378,6 @@ static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
return avpkt->size;
}
AVCodec ff_dsicinvideo_decoder = {
.name = "dsicinvideo",
.type = AVMEDIA_TYPE_VIDEO,
......
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