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Diffstat (limited to 'chromium/third_party/ffmpeg/libavcodec/mvcdec.c')
-rw-r--r--chromium/third_party/ffmpeg/libavcodec/mvcdec.c140
1 files changed, 73 insertions, 67 deletions
diff --git a/chromium/third_party/ffmpeg/libavcodec/mvcdec.c b/chromium/third_party/ffmpeg/libavcodec/mvcdec.c
index 2cc7735cfbe..69f0ee259cf 100644
--- a/chromium/third_party/ffmpeg/libavcodec/mvcdec.c
+++ b/chromium/third_party/ffmpeg/libavcodec/mvcdec.c
@@ -25,6 +25,7 @@
*/
#include "libavutil/intreadwrite.h"
+
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
@@ -37,8 +38,8 @@ typedef struct MvcContext {
static av_cold int mvc_decode_init(AVCodecContext *avctx)
{
MvcContext *s = avctx->priv_data;
- int width = avctx->width;
- int height = avctx->height;
+ int width = avctx->width;
+ int height = avctx->height;
int ret;
if (avctx->codec_id == AV_CODEC_ID_MVC1) {
@@ -50,62 +51,60 @@ static av_cold int mvc_decode_init(AVCodecContext *avctx)
if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
return ret;
- avctx->pix_fmt = (avctx->codec_id == AV_CODEC_ID_MVC1) ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_BGRA;
- s->frame = av_frame_alloc();
+ avctx->pix_fmt = (avctx->codec_id == AV_CODEC_ID_MVC1) ? AV_PIX_FMT_RGB555
+ : AV_PIX_FMT_RGB32;
+ s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM);
- s->vflip = avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9);
+ s->vflip = avctx->extradata_size >= 9 &&
+ !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9);
return 0;
}
-static int decode_mvc1(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_start, int width, int height, int linesize)
+static int decode_mvc1(AVCodecContext *avctx, GetByteContext *gb,
+ uint8_t *dst_start, int width, int height, int linesize)
{
uint8_t *dst;
uint16_t v[8];
int mask, x, y, i;
- x = y= 0;
- while (bytestream2_get_bytes_left(gb) >= 6) {
- mask = bytestream2_get_be16u(gb);
- v[0] = bytestream2_get_be16u(gb);
- v[1] = bytestream2_get_be16u(gb);
- if ((v[0] & 0x8000)) {
- if (bytestream2_get_bytes_left(gb) < 12) {
- av_log(avctx, AV_LOG_WARNING, "buffer overflow\n");
- return AVERROR_INVALIDDATA;
+ for (y = 0; y < height; y += 4) {
+ for (x = 0; x < width; x += 4) {
+ if (bytestream2_get_bytes_left(gb) < 6)
+ return 0;
+
+ mask = bytestream2_get_be16u(gb);
+ v[0] = bytestream2_get_be16u(gb);
+ v[1] = bytestream2_get_be16u(gb);
+ if ((v[0] & 0x8000)) {
+ if (bytestream2_get_bytes_left(gb) < 12) {
+ av_log(avctx, AV_LOG_WARNING, "buffer overflow\n");
+ return AVERROR_INVALIDDATA;
+ }
+ for (i = 2; i < 8; i++)
+ v[i] = bytestream2_get_be16u(gb);
+ } else {
+ v[2] = v[4] = v[6] = v[0];
+ v[3] = v[5] = v[7] = v[1];
}
- for (i = 2; i < 8; i++)
- v[i] = bytestream2_get_be16u(gb);
- } else {
- v[2] = v[4] = v[6] = v[0];
- v[3] = v[5] = v[7] = v[1];
- }
-
-#define PIX16(target, true, false) \
- i = (mask & target) ? true : false; \
- AV_WN16A(dst, (v[i] & 0x7C00) | (v[i] & 0x3E0) | (v[i] & 0x1F)); \
- dst += 2;
-#define ROW16(row, a1, a0, b1, b0) \
- dst = dst_start + (y + row) * linesize + x * 2; \
- PIX16(1 << (row * 4), a1, a0) \
- PIX16(1 << (row * 4 + 1), a1, a0) \
- PIX16(1 << (row * 4 + 2), b1, b0) \
- PIX16(1 << (row * 4 + 3), b1, b0)
-
- ROW16(0, 0, 1, 2, 3);
- ROW16(1, 0, 1, 2, 3);
- ROW16(2, 4, 5, 6, 7);
- ROW16(3, 4, 5, 6, 7);
-
- x += 4;
- if (x >= width) {
- y += 4;
- if (y >= height) {
- break;
- }
- x = 0;
+#define PIX16(target, true, false) \
+ i = (mask & target) ? true : false; \
+ AV_WN16A(dst, v[i] & 0x7FFF); \
+ dst += 2;
+
+#define ROW16(row, a1, a0, b1, b0) \
+ dst = dst_start + (y + row) * linesize + x * 2; \
+ PIX16(1 << (row * 4), a1, a0) \
+ PIX16(1 << (row * 4 + 1), a1, a0) \
+ PIX16(1 << (row * 4 + 2), b1, b0) \
+ PIX16(1 << (row * 4 + 3), b1, b0)
+
+ ROW16(0, 0, 1, 2, 3);
+ ROW16(1, 0, 1, 2, 3);
+ ROW16(2, 4, 5, 6, 7);
+ ROW16(3, 4, 5, 6, 7);
}
}
return 0;
@@ -119,24 +118,26 @@ static void set_4x4_block(uint8_t *dst, int linesize, uint32_t pixel)
AV_WN32A(dst + j * linesize + i * 4, pixel);
}
-#define PIX32(target, true, false) \
- AV_WN32A(dst, (mask & target) ? v[true] : v[false]); \
+#define PIX32(target, true, false) \
+ AV_WN32A(dst, (mask & target) ? v[true] : v[false]); \
dst += 4;
-#define ROW32(row, a1, a0, b1, b0) \
- dst = dst_start + (y + row) * linesize + x * 4; \
- PIX32(1 << (row * 4), a1, a0) \
- PIX32(1 << (row * 4 + 1), a1, a0) \
- PIX32(1 << (row * 4 + 2), b1, b0) \
+#define ROW32(row, a1, a0, b1, b0) \
+ dst = dst_start + (y + row) * linesize + x * 4; \
+ PIX32(1 << (row * 4), a1, a0) \
+ PIX32(1 << (row * 4 + 1), a1, a0) \
+ PIX32(1 << (row * 4 + 2), b1, b0) \
PIX32(1 << (row * 4 + 3), b1, b0)
-#define MVC2_BLOCK \
- ROW32(0, 1, 0, 3, 2); \
- ROW32(1, 1, 0, 3, 2); \
- ROW32(2, 5, 4, 7, 6); \
+#define MVC2_BLOCK \
+ ROW32(0, 1, 0, 3, 2); \
+ ROW32(1, 1, 0, 3, 2); \
+ ROW32(2, 5, 4, 7, 6); \
ROW32(3, 5, 4, 7, 6);
-static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_start, int width, int height, int linesize, int vflip)
+static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb,
+ uint8_t *dst_start, int width, int height,
+ int linesize, int vflip)
{
uint8_t *dst;
uint32_t color[128], v[8];
@@ -165,7 +166,7 @@ static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_s
if (vflip) {
dst_start += (height - 1) * linesize;
- linesize = -linesize;
+ linesize = -linesize;
}
x = y = 0;
while (bytestream2_get_bytes_left(gb) >= 1) {
@@ -173,17 +174,19 @@ static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_s
if ((p0 & 0x80)) {
if ((p0 & 0x40)) {
p0 &= 0x3F;
- p0 = (p0 << 2) | (p0 >> 4);
- set_4x4_block(dst_start + y * linesize + x * 4, linesize, 0xFF000000 | (p0 << 16) | (p0 << 8) | p0);
+ p0 = (p0 << 2) | (p0 >> 4);
+ set_4x4_block(dst_start + y * linesize + x * 4, linesize,
+ 0xFF000000 | (p0 << 16) | (p0 << 8) | p0);
} else {
int g, r;
p0 &= 0x3F;
- p0 = (p0 << 2) | (p0 >> 4);
+ p0 = (p0 << 2) | (p0 >> 4);
if (bytestream2_get_bytes_left(gb) < 2)
return AVERROR_INVALIDDATA;
g = bytestream2_get_byteu(gb);
r = bytestream2_get_byteu(gb);
- set_4x4_block(dst_start + y * linesize + x * 4, linesize, 0xFF000000 | (r << 16) | (g << 8) | p0);
+ set_4x4_block(dst_start + y * linesize + x * 4, linesize,
+ 0xFF000000 | (r << 16) | (g << 8) | p0);
}
} else {
if (bytestream2_get_bytes_left(gb) < 1)
@@ -191,7 +194,8 @@ static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_s
p1 = bytestream2_get_byteu(gb);
if ((p1 & 0x80)) {
if ((p0 & 0x7F) == (p1 & 0x7F)) {
- set_4x4_block(dst_start + y * linesize + x * 4, linesize, color[p0 & 0x7F]);
+ set_4x4_block(dst_start + y * linesize + x * 4, linesize,
+ color[p0 & 0x7F]);
} else {
if (bytestream2_get_bytes_left(gb) < 2)
return AVERROR_INVALIDDATA;
@@ -223,8 +227,7 @@ static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_s
return 0;
}
-static int mvc_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
+static int mvc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
MvcContext *s = avctx->priv_data;
@@ -236,9 +239,12 @@ static int mvc_decode_frame(AVCodecContext *avctx,
bytestream2_init(&gb, avpkt->data, avpkt->size);
if (avctx->codec_id == AV_CODEC_ID_MVC1)
- ret = decode_mvc1(avctx, &gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]);
+ ret = decode_mvc1(avctx, &gb, s->frame->data[0],
+ avctx->width, avctx->height, s->frame->linesize[0]);
else
- ret = decode_mvc2(avctx, &gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0], s->vflip);
+ ret = decode_mvc2(avctx, &gb, s->frame->data[0],
+ avctx->width, avctx->height, s->frame->linesize[0],
+ s->vflip);
if (ret < 0)
return ret;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-07 20:40:57 +0000