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ffmpeg.wasm-core
Commit a0cabd0a authored by Anton Khirnov's avatar Anton Khirnov
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mimic: cosmetics, reformat

parent 04e12496
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Showing with 57 additions and 54 deletions
libavcodec/mimic.c
View file @ a0cabd0a
......@@ -114,9 +114,9 @@ static av_cold int mimic_decode_init(AVCodecContext *avctx)
MimicContext *ctx = avctx->priv_data;
ctx->prev_index = 0;
ctx->cur_index = 15;
ctx->cur_index = 15;
if(init_vlc(&ctx->vlc, 11, FF_ARRAY_ELEMS(huffbits),
if (init_vlc(&ctx->vlc, 11, FF_ARRAY_ELEMS(huffbits),
huffbits, 1, 1, huffcodes, 4, 4, 0)) {
av_log(avctx, AV_LOG_ERROR, "error initializing vlc table\n");
return -1;
......@@ -131,7 +131,8 @@ static int mimic_decode_update_thread_context(AVCodecContext *avctx, const AVCod
{
MimicContext *dst = avctx->priv_data, *src = avctx_from->priv_data;
if (avctx == avctx_from) return 0;
if (avctx == avctx_from)
return 0;
dst->cur_index = src->next_cur_index;
dst->prev_index = src->next_prev_index;
......@@ -190,22 +191,22 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale)
block[0] = get_bits(&ctx->gb, 8) << 3;
for(pos = 1; pos < num_coeffs; pos++) {
for (pos = 1; pos < num_coeffs; pos++) {
uint32_t vlc, num_bits;
int value;
int coeff;
vlc = get_vlc2(&ctx->gb, ctx->vlc.table, ctx->vlc.bits, 3);
if(!vlc) /* end-of-block code */
if (!vlc) /* end-of-block code */
return 1;
if(vlc == -1)
if (vlc == -1)
return 0;
/* pos_add and num_bits are coded in the vlc code */
pos += vlc&15; // pos_add
num_bits = vlc>>4; // num_bits
pos += vlc & 15; // pos_add
num_bits = vlc >> 4; // num_bits
if(pos >= 64)
if (pos >= 64)
return 0;
value = get_bits(&ctx->gb, num_bits);
......@@ -214,7 +215,7 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale)
* a factor of 4 was added to the input */
coeff = vlcdec_lookup[num_bits][value];
if(pos<3)
if (pos < 3)
coeff <<= 4;
else /* TODO Use >> 10 instead of / 1001 */
coeff = (coeff * qscale) / 1001;
......@@ -230,39 +231,38 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
{
int y, x, plane, cur_row = 0;
for(plane = 0; plane < 3; plane++) {
for (plane = 0; plane < 3; plane++) {
const int is_chroma = !!plane;
const int qscale = av_clip(10000-quality,is_chroma?1000:2000,10000)<<2;
const int stride = ctx->flipped_ptrs[ctx->cur_index].linesize[plane];
const uint8_t *src = ctx->flipped_ptrs[ctx->prev_index].data[plane];
uint8_t *dst = ctx->flipped_ptrs[ctx->cur_index ].data[plane];
for(y = 0; y < ctx->num_vblocks[plane]; y++) {
for(x = 0; x < ctx->num_hblocks[plane]; x++) {
const int qscale = av_clip(10000 - quality, is_chroma ? 1000 : 2000,
10000) << 2;
const int stride = ctx->flipped_ptrs[ctx->cur_index ].linesize[plane];
const uint8_t *src = ctx->flipped_ptrs[ctx->prev_index].data[plane];
uint8_t *dst = ctx->flipped_ptrs[ctx->cur_index ].data[plane];
for (y = 0; y < ctx->num_vblocks[plane]; y++) {
for (x = 0; x < ctx->num_hblocks[plane]; x++) {
/* Check for a change condition in the current block.
* - iframes always change.
* - Luma plane changes on get_bits1 == 0
* - Chroma planes change on get_bits1 == 1 */
if(is_iframe || get_bits1(&ctx->gb) == is_chroma) {
if (is_iframe || get_bits1(&ctx->gb) == is_chroma) {
/* Luma planes may use a backreference from the 15 last
* frames preceding the previous. (get_bits1 == 1)
* Chroma planes don't use backreferences. */
if(is_chroma || is_iframe || !get_bits1(&ctx->gb)) {
if(!vlc_decode_block(ctx, num_coeffs, qscale))
if (is_chroma || is_iframe || !get_bits1(&ctx->gb)) {
if (!vlc_decode_block(ctx, num_coeffs, qscale))
return 0;
ctx->dsp.idct_put(dst, stride, ctx->dct_block);
} else {
unsigned int backref = get_bits(&ctx->gb, 4);
int index = (ctx->cur_index+backref)&15;
uint8_t *p = ctx->flipped_ptrs[index].data[0];
int index = (ctx->cur_index + backref) & 15;
uint8_t *p = ctx->flipped_ptrs[index].data[0];
if (index != ctx->cur_index && p) {
ff_thread_await_progress(&ctx->buf_ptrs[index], cur_row, 0);
ff_thread_await_progress(&ctx->buf_ptrs[index],
cur_row, 0);
p += src -
ctx->flipped_ptrs[ctx->prev_index].data[plane];
ctx->flipped_ptrs[ctx->prev_index].data[plane];
ctx->dsp.put_pixels_tab[1][0](dst, p, stride, 8);
} else {
av_log(ctx->avctx, AV_LOG_ERROR,
......@@ -270,16 +270,18 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
}
}
} else {
ff_thread_await_progress(&ctx->buf_ptrs[ctx->prev_index], cur_row, 0);
ff_thread_await_progress(&ctx->buf_ptrs[ctx->prev_index],
cur_row, 0);
ctx->dsp.put_pixels_tab[1][0](dst, src, stride, 8);
}
src += 8;
dst += 8;
}
src += (stride - ctx->num_hblocks[plane])<<3;
dst += (stride - ctx->num_hblocks[plane])<<3;
src += (stride - ctx->num_hblocks[plane]) << 3;
dst += (stride - ctx->num_hblocks[plane]) << 3;
ff_thread_report_progress(&ctx->buf_ptrs[ctx->cur_index], cur_row++, 0);
ff_thread_report_progress(&ctx->buf_ptrs[ctx->cur_index],
cur_row++, 0);
}
}
......@@ -293,10 +295,10 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
static void prepare_avpic(MimicContext *ctx, AVPicture *dst, AVPicture *src)
{
int i;
dst->data[0] = src->data[0]+( ctx->avctx->height -1)*src->linesize[0];
dst->data[1] = src->data[2]+((ctx->avctx->height>>1)-1)*src->linesize[2];
dst->data[2] = src->data[1]+((ctx->avctx->height>>1)-1)*src->linesize[1];
for(i = 0; i < 3; i++)
dst->data[0] = src->data[0] + ( ctx->avctx->height - 1) * src->linesize[0];
dst->data[1] = src->data[2] + ((ctx->avctx->height >> 1) - 1) * src->linesize[2];
dst->data[2] = src->data[1] + ((ctx->avctx->height >> 1) - 1) * src->linesize[1];
for (i = 0; i < 3; i++)
dst->linesize[i] = -src->linesize[i];
}
......@@ -304,13 +306,13 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
MimicContext *ctx = avctx->priv_data;
int buf_size = avpkt->size;
int swap_buf_size = buf_size - MIMIC_HEADER_SIZE;
MimicContext *ctx = avctx->priv_data;
GetByteContext gb;
int is_pframe;
int width, height;
int quality, num_coeffs;
int swap_buf_size = buf_size - MIMIC_HEADER_SIZE;
int res;
if (buf_size <= MIMIC_HEADER_SIZE) {
......@@ -328,11 +330,11 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
num_coeffs = bytestream2_get_byteu(&gb);
bytestream2_skip(&gb, 3); /* some constant */
if(!ctx->avctx) {
if (!ctx->avctx) {
int i;
if(!(width == 160 && height == 120) &&
!(width == 320 && height == 240)) {
if (!(width == 160 && height == 120) &&
!(width == 320 && height == 240)) {
av_log(avctx, AV_LOG_ERROR, "invalid width/height!\n");
return -1;
}
......@@ -341,23 +343,24 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
avctx->width = width;
avctx->height = height;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
for(i = 0; i < 3; i++) {
for (i = 0; i < 3; i++) {
ctx->num_vblocks[i] = -((-height) >> (3 + !!i));
ctx->num_hblocks[i] = width >> (3 + !!i) ;
ctx->num_hblocks[i] = width >> (3 + !!i);
}
} else if(width != ctx->avctx->width || height != ctx->avctx->height) {
} else if (width != ctx->avctx->width || height != ctx->avctx->height) {
av_log(avctx, AV_LOG_ERROR, "resolution changing is not supported\n");
return -1;
}
if(is_pframe && !ctx->buf_ptrs[ctx->prev_index].data[0]) {
if (is_pframe && !ctx->buf_ptrs[ctx->prev_index].data[0]) {
av_log(avctx, AV_LOG_ERROR, "decoding must start with keyframe\n");
return -1;
}
ctx->buf_ptrs[ctx->cur_index].reference = 1;
ctx->buf_ptrs[ctx->cur_index].pict_type = is_pframe ? AV_PICTURE_TYPE_P:AV_PICTURE_TYPE_I;
if(ff_thread_get_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index])) {
ctx->buf_ptrs[ctx->cur_index].pict_type = is_pframe ? AV_PICTURE_TYPE_P :
AV_PICTURE_TYPE_I;
if (ff_thread_get_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index])) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
......@@ -371,12 +374,12 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
ff_thread_finish_setup(avctx);
av_fast_padded_malloc(&ctx->swap_buf, &ctx->swap_buf_size, swap_buf_size);
if(!ctx->swap_buf)
if (!ctx->swap_buf)
return AVERROR(ENOMEM);
ctx->dsp.bswap_buf(ctx->swap_buf,
(const uint32_t*) (buf + MIMIC_HEADER_SIZE),
swap_buf_size>>2);
(const uint32_t*) (buf + MIMIC_HEADER_SIZE),
swap_buf_size >> 2);
init_get_bits(&ctx->gb, ctx->swap_buf, swap_buf_size << 3);
res = decode(ctx, quality, num_coeffs, !is_pframe);
......@@ -395,7 +398,7 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
ctx->cur_index = ctx->next_cur_index;
/* Only release frames that aren't used for backreferences anymore */
if(ctx->buf_ptrs[ctx->cur_index].data[0])
if (ctx->buf_ptrs[ctx->cur_index].data[0])
ff_thread_release_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index]);
return buf_size;
......@@ -411,8 +414,8 @@ static av_cold int mimic_decode_end(AVCodecContext *avctx)
if (avctx->internal->is_copy)
return 0;
for(i = 0; i < 16; i++)
if(ctx->buf_ptrs[i].data[0])
for (i = 0; i < 16; i++)
if (ctx->buf_ptrs[i].data[0])
ff_thread_release_buffer(avctx, &ctx->buf_ptrs[i]);
ff_free_vlc(&ctx->vlc);
......
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