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ffmpeg.wasm-core
Commit b94eda71 authored by James Almer's avatar James Almer
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Merge commit '95a8a03a' 

* commit '95a8a03a':
  Add FM Screen Capture Codec decoder
Merged-by: 's avatarJames Almer <jamrial@gmail.com>
parents 2d112188 95a8a03a
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Showing with 41 additions and 35 deletions
libavcodec/fmvc.c
View file @ b94eda71
...@@ -44,11 +44,11 @@ typedef struct FMVCContext { ...@@ -44,11 +44,11 @@ typedef struct FMVCContext {
size_t buffer_size; size_t buffer_size;
uint8_t *pbuffer; uint8_t *pbuffer;
size_t pbuffer_size; size_t pbuffer_size;
int stride; ptrdiff_t stride;
int bpp; int bpp;
int yb, xb; int yb, xb;
InterBlock *blocks; InterBlock *blocks;
int nb_blocks; unsigned nb_blocks;
} FMVCContext; } FMVCContext;
static int decode_type2(GetByteContext *gb, PutByteContext *pb) static int decode_type2(GetByteContext *gb, PutByteContext *pb)
...@@ -150,7 +150,7 @@ static int decode_type2(GetByteContext *gb, PutByteContext *pb) ...@@ -150,7 +150,7 @@ static int decode_type2(GetByteContext *gb, PutByteContext *pb)
if (opcode >= 0x40) { if (opcode >= 0x40) {
bytestream2_skip(gb, 1); bytestream2_skip(gb, 1);
pos = - ((opcode >> 2) & 7) - 1 - 8 * bytestream2_get_byte(gb); pos = - ((opcode >> 2) & 7) - 1 - 8 * bytestream2_get_byte(gb);
len = (opcode >> 5) - 1; len = (opcode >> 5) - 1;
bytestream2_init(&gbc, pb->buffer_start, pb->buffer_end - pb->buffer_start); bytestream2_init(&gbc, pb->buffer_start, pb->buffer_end - pb->buffer_start);
bytestream2_seek(&gbc, bytestream2_tell_p(pb) + pos, SEEK_SET); bytestream2_seek(&gbc, bytestream2_tell_p(pb) + pos, SEEK_SET);
...@@ -305,7 +305,7 @@ static int decode_type1(GetByteContext *gb, PutByteContext *pb) ...@@ -305,7 +305,7 @@ static int decode_type1(GetByteContext *gb, PutByteContext *pb)
break; break;
opcode = bytestream2_get_byte(gb); opcode = bytestream2_get_byte(gb);
if (opcode < 0xF8) { if (opcode < 0xF8) {
opcode = opcode + 32; opcode += 32;
break; break;
} }
i = opcode - 0xF8; i = opcode - 0xF8;
...@@ -393,9 +393,8 @@ static int decode_type1(GetByteContext *gb, PutByteContext *pb) ...@@ -393,9 +393,8 @@ static int decode_type1(GetByteContext *gb, PutByteContext *pb)
return 0; return 0;
} }
static int decode_frame(AVCodecContext *avctx, static int decode_frame(AVCodecContext *avctx, void *data,
void *data, int *got_frame, int *got_frame, AVPacket *avpkt)
AVPacket *avpkt)
{ {
FMVCContext *s = avctx->priv_data; FMVCContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb; GetByteContext *gb = &s->gb;
...@@ -414,7 +413,7 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -414,7 +413,7 @@ static int decode_frame(AVCodecContext *avctx,
if (frame->key_frame) { if (frame->key_frame) {
const uint8_t *src; const uint8_t *src;
int type, size; unsigned type, size;
uint8_t *dst; uint8_t *dst;
type = bytestream2_get_le16(gb); type = bytestream2_get_le16(gb);
...@@ -428,7 +427,7 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -428,7 +427,7 @@ static int decode_frame(AVCodecContext *avctx,
} else if (type == 2){ } else if (type == 2){
decode_type2(gb, pb); decode_type2(gb, pb);
} else { } else {
avpriv_report_missing_feature(avctx, "compression %d", type); avpriv_report_missing_feature(avctx, "Compression type %d", type);
return AVERROR_PATCHWELCOME; return AVERROR_PATCHWELCOME;
} }
...@@ -440,7 +439,8 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -440,7 +439,8 @@ static int decode_frame(AVCodecContext *avctx,
src += s->stride * 4; src += s->stride * 4;
} }
} else { } else {
int block, nb_blocks, type, k, l; unsigned block, nb_blocks;
int type, k, l;
uint8_t *ssrc, *ddst; uint8_t *ssrc, *ddst;
const uint32_t *src; const uint32_t *src;
uint32_t *dst; uint32_t *dst;
...@@ -456,7 +456,8 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -456,7 +456,8 @@ static int decode_frame(AVCodecContext *avctx,
type = bytestream2_get_le16(gb); type = bytestream2_get_le16(gb);
for (block = 0; block < nb_blocks; block++) { for (block = 0; block < nb_blocks; block++) {
int size, offset, start = 0; unsigned size, offset;
int start = 0;
offset = bytestream2_get_le16(gb); offset = bytestream2_get_le16(gb);
if (offset >= s->nb_blocks) if (offset >= s->nb_blocks)
...@@ -472,7 +473,7 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -472,7 +473,7 @@ static int decode_frame(AVCodecContext *avctx,
} else if (type == 2){ } else if (type == 2){
decode_type2(gb, pb); decode_type2(gb, pb);
} else { } else {
avpriv_report_missing_feature(avctx, "compression %d", type); avpriv_report_missing_feature(avctx, "Compression type %d", type);
return AVERROR_PATCHWELCOME; return AVERROR_PATCHWELCOME;
} }
...@@ -497,9 +498,8 @@ static int decode_frame(AVCodecContext *avctx, ...@@ -497,9 +498,8 @@ static int decode_frame(AVCodecContext *avctx,
if (s->blocks[block].xor) { if (s->blocks[block].xor) {
for (k = 0; k < block_h; k++) { for (k = 0; k < block_h; k++) {
uint32_t *column = dst; uint32_t *column = dst;
for (l = 0; l < block_w; l++) { for (l = 0; l < block_w; l++)
*dst++ ^= *src++; *dst++ ^= *src++;
}
dst = &column[s->stride]; dst = &column[s->stride];
} }
} }
...@@ -529,17 +529,24 @@ static av_cold int decode_init(AVCodecContext *avctx) ...@@ -529,17 +529,24 @@ static av_cold int decode_init(AVCodecContext *avctx)
int i, j, m, block = 0, h = BLOCK_HEIGHT, w = BLOCK_WIDTH; int i, j, m, block = 0, h = BLOCK_HEIGHT, w = BLOCK_WIDTH;
switch (avctx->bits_per_coded_sample) { switch (avctx->bits_per_coded_sample) {
case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break; case 16:
case 24: avctx->pix_fmt = AV_PIX_FMT_BGR24; break; avctx->pix_fmt = AV_PIX_FMT_RGB555;
case 32: avctx->pix_fmt = AV_PIX_FMT_BGRA; break; break;
case 24:
avctx->pix_fmt = AV_PIX_FMT_BGR24;
break;
case 32:
avctx->pix_fmt = AV_PIX_FMT_BGRA;
break;
default: default:
av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", avctx->bits_per_coded_sample); av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n",
avctx->bits_per_coded_sample);
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }
s->stride = (avctx->width * avctx->bits_per_coded_sample + 31) / 32; s->stride = (avctx->width * avctx->bits_per_coded_sample + 31) / 32;
s->xb = s->stride / BLOCK_WIDTH; s->xb = s->stride / BLOCK_WIDTH;
m = s->stride % BLOCK_WIDTH; m = s->stride % BLOCK_WIDTH;
if (m) { if (m) {
if (m < 37) { if (m < 37) {
w = m + BLOCK_WIDTH; w = m + BLOCK_WIDTH;
...@@ -550,7 +557,7 @@ static av_cold int decode_init(AVCodecContext *avctx) ...@@ -550,7 +557,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
} }
s->yb = avctx->height / BLOCK_HEIGHT; s->yb = avctx->height / BLOCK_HEIGHT;
m = avctx->height % BLOCK_HEIGHT; m = avctx->height % BLOCK_HEIGHT;
if (m) { if (m) {
if (m < 49) { if (m < 49) {
h = m + BLOCK_HEIGHT; h = m + BLOCK_HEIGHT;
...@@ -563,8 +570,7 @@ static av_cold int decode_init(AVCodecContext *avctx) ...@@ -563,8 +570,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->nb_blocks = s->xb * s->yb; s->nb_blocks = s->xb * s->yb;
if (!s->nb_blocks) if (!s->nb_blocks)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
s->blocks = av_calloc(s->nb_blocks, sizeof(*s->blocks));
s->blocks = av_calloc(s->nb_blocks, sizeof(*s->blocks));
if (!s->blocks) if (!s->blocks)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
...@@ -572,32 +578,32 @@ static av_cold int decode_init(AVCodecContext *avctx) ...@@ -572,32 +578,32 @@ static av_cold int decode_init(AVCodecContext *avctx)
for (j = 0; j < s->xb; j++) { for (j = 0; j < s->xb; j++) {
if (i != (s->yb - 1) || j != (s->xb - 1)) { if (i != (s->yb - 1) || j != (s->xb - 1)) {
if (i == s->yb - 1) { if (i == s->yb - 1) {
s->blocks[block].w = BLOCK_WIDTH; s->blocks[block].w = BLOCK_WIDTH;
s->blocks[block].h = h; s->blocks[block].h = h;
s->blocks[block].size = BLOCK_WIDTH * h; s->blocks[block].size = BLOCK_WIDTH * h;
} else if (j == s->xb - 1) { } else if (j == s->xb - 1) {
s->blocks[block].w = w; s->blocks[block].w = w;
s->blocks[block].h = BLOCK_HEIGHT; s->blocks[block].h = BLOCK_HEIGHT;
s->blocks[block].size = BLOCK_HEIGHT * w; s->blocks[block].size = BLOCK_HEIGHT * w;
} else { } else {
s->blocks[block].w = BLOCK_WIDTH; s->blocks[block].w = BLOCK_WIDTH;
s->blocks[block].h = BLOCK_HEIGHT; s->blocks[block].h = BLOCK_HEIGHT;
s->blocks[block].size = BLOCK_WIDTH * BLOCK_HEIGHT; s->blocks[block].size = BLOCK_WIDTH * BLOCK_HEIGHT;
} }
} else { } else {
s->blocks[block].w = w; s->blocks[block].w = w;
s->blocks[block].h = h; s->blocks[block].h = h;
s->blocks[block].size = w * h; s->blocks[block].size = w * h;
} }
block++; block++;
} }
} }
s->bpp = avctx->bits_per_coded_sample >> 3; s->bpp = avctx->bits_per_coded_sample >> 3;
s->buffer_size = avctx->width * avctx->height * 4; s->buffer_size = avctx->width * avctx->height * 4;
s->pbuffer_size = avctx->width * avctx->height * 4; s->pbuffer_size = avctx->width * avctx->height * 4;
s->buffer = av_mallocz(s->buffer_size); s->buffer = av_mallocz(s->buffer_size);
s->pbuffer = av_mallocz(s->pbuffer_size); s->pbuffer = av_mallocz(s->pbuffer_size);
if (!s->buffer || !s->pbuffer) if (!s->buffer || !s->pbuffer)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
......
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