* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avcodec.h"
+#include <inttypes.h>
+
+#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
-static av_cold int decode_init(AVCodecContext *avctx)
+#define BITSTREAM_READER_LE
+#include "avcodec.h"
+#include "bitstream.h"
+#include "bytestream.h"
+#include "internal.h"
+#include "unary.h"
+
+static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size,
+ int id, int bpp)
{
- avctx->pix_fmt = PIX_FMT_YUV420P;
- avctx->coded_frame = avcodec_alloc_frame();
- if (!avctx->coded_frame)
- return AVERROR(ENOMEM);
+ int h;
+ uint8_t *dst;
+ int ret;
+
+ if (src_size < avctx->width * avctx->height * bpp) {
+ av_log(avctx, AV_LOG_ERROR, "packet too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->pix_fmt = id;
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+ return ret;
+
+ dst = pic->data[0];
+ for (h = 0; h < avctx->height; h++) {
+ memcpy(dst, src, avctx->width * bpp);
+ src += avctx->width * bpp;
+ dst += pic->linesize[0];
+ }
return 0;
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- AVPacket *avpkt)
+static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
{
int h, w;
- AVFrame *pic = avctx->coded_frame;
- const uint8_t *src = avpkt->data;
- uint8_t *Y1, *Y2, *U, *V;
+ uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
int ret;
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
-
- if (avpkt->size < avctx->width * avctx->height * 3 / 2 + 16) {
+ if (src_size < avctx->width * avctx->height * 18 / 16) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
- pic->reference = 0;
- if ((ret = avctx->get_buffer(avctx, pic)) < 0)
+ avctx->pix_fmt = AV_PIX_FMT_YUV410P;
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
return ret;
- pic->pict_type = AV_PICTURE_TYPE_I;
- pic->key_frame = 1;
+ Y1 = pic->data[0];
+ Y2 = pic->data[0] + pic->linesize[0];
+ Y3 = pic->data[0] + pic->linesize[0] * 2;
+ Y4 = pic->data[0] + pic->linesize[0] * 3;
+ U = pic->data[1];
+ V = pic->data[2];
+ for (h = 0; h < avctx->height; h += 4) {
+ for (w = 0; w < avctx->width; w += 4) {
+ AV_COPY32(Y1 + w, src);
+ AV_COPY32(Y2 + w, src + 4);
+ AV_COPY32(Y3 + w, src + 8);
+ AV_COPY32(Y4 + w, src + 12);
+ U[w >> 2] = src[16] + 0x80;
+ V[w >> 2] = src[17] + 0x80;
+ src += 18;
+ }
+ Y1 += pic->linesize[0] << 2;
+ Y2 += pic->linesize[0] << 2;
+ Y3 += pic->linesize[0] << 2;
+ Y4 += pic->linesize[0] << 2;
+ U += pic->linesize[1];
+ V += pic->linesize[2];
+ }
- if (AV_RL32(src) != 0x01000002) {
- av_log_ask_for_sample(avctx, "Unknown frame header %X\n", AV_RL32(src));
- return AVERROR_PATCHWELCOME;
+ return 0;
+}
+
+static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ int h, w;
+ uint8_t *Y1, *Y2, *U, *V;
+ int ret;
+
+ if (src_size < avctx->width * avctx->height * 3 / 2) {
+ av_log(avctx, AV_LOG_ERROR, "packet too small\n");
+ return AVERROR_INVALIDDATA;
}
- src += 16;
+
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+ return ret;
Y1 = pic->data[0];
Y2 = pic->data[0] + pic->linesize[0];
V = pic->data[2];
for (h = 0; h < avctx->height; h += 2) {
for (w = 0; w < avctx->width; w += 2) {
- AV_WN16A(Y1 + w, AV_RN16A(src));
- AV_WN16A(Y2 + w, AV_RN16A(src + 2));
+ AV_COPY16(Y1 + w, src);
+ AV_COPY16(Y2 + w, src + 2);
U[w >> 1] = src[4] + 0x80;
V[w >> 1] = src[5] + 0x80;
src += 6;
V += pic->linesize[2];
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = *pic;
+ return 0;
+}
- return avpkt->size;
+static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ int h, w;
+ uint8_t *Y, *U, *V;
+ int ret;
+
+ if (src_size < avctx->width * avctx->height * 3) {
+ av_log(avctx, AV_LOG_ERROR, "packet too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->pix_fmt = AV_PIX_FMT_YUV444P;
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+ return ret;
+
+ Y = pic->data[0];
+ U = pic->data[1];
+ V = pic->data[2];
+ for (h = 0; h < avctx->height; h++) {
+ for (w = 0; w < avctx->width; w++) {
+ Y[w] = *src++;
+ U[w] = *src++ ^ 0x80;
+ V[w] = *src++ ^ 0x80;
+ }
+ Y += pic->linesize[0];
+ U += pic->linesize[1];
+ V += pic->linesize[2];
+ }
+
+ return 0;
+}
+
+static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
+static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
+static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
+
+static inline uint8_t decode_sym(BitstreamContext *bc, uint8_t lru[8])
+{
+ uint8_t c, val;
+
+ c = get_unary(bc, 0, 8);
+ if (!c) {
+ val = bitstream_read(bc, 8);
+ memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
+ } else {
+ val = lru[c - 1];
+ memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
+ }
+ lru[0] = val;
+
+ return val;
+}
+
+static int check_slice_size(AVCodecContext *avctx,
+ const uint8_t *src, int src_size,
+ int slice_size, int off)
+{
+ int cur_slice_size;
+
+ if (slice_size > src_size - off) {
+ av_log(avctx, AV_LOG_ERROR,
+ "invalid slice size %d (only %d bytes left)\n",
+ slice_size, src_size - off);
+ return AVERROR_INVALIDDATA;
+ }
+ if (slice_size <= 16) {
+ av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
+ slice_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ cur_slice_size = AV_RL32(src + off);
+ if (cur_slice_size != slice_size - 16) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Slice sizes mismatch: got %d instead of %d\n",
+ cur_slice_size, slice_size - 16);
+ }
+
+ return 0;
}
-static av_cold int decode_close(AVCodecContext *avctx)
+static int load_buffer(AVCodecContext *avctx,
+ const uint8_t *src, int src_size,
+ GetByteContext *gb,
+ int *nslices, int *off)
{
- AVFrame *pic = avctx->coded_frame;
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
- av_freep(&avctx->coded_frame);
+ bytestream2_init(gb, src, src_size);
+ *nslices = bytestream2_get_le16(gb);
+ *off = FFALIGN(*nslices * 4 + 2, 16);
+ if (src_size < *off) {
+ av_log(avctx, AV_LOG_ERROR, "no slice data\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (!*nslices) {
+ avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
+ avctx->width, avctx->height);
+ return AVERROR_PATCHWELCOME;
+ }
return 0;
}
+static inline uint8_t decode_sym_565(BitstreamContext *bc, uint8_t lru[8],
+ int bits)
+{
+ uint8_t c, val;
+
+ c = get_unary(bc, 0, bits);
+ if (!c) {
+ val = bitstream_read(bc, bits);
+ memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
+ } else {
+ val = lru[c - 1];
+ memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
+ }
+ lru[0] = val;
+
+ return val;
+}
+
+typedef int (*decode_slice_func)(BitstreamContext *bc, AVFrame *frame,
+ int line, int height, uint8_t lru[3][8]);
+
+typedef void (*setup_lru_func)(uint8_t lru[3][8]);
+
+static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size,
+ decode_slice_func decode_slice,
+ setup_lru_func setup_lru,
+ enum AVPixelFormat fmt)
+{
+ GetByteContext gb;
+ BitstreamContext bc;
+ int nslices, slice, line = 0;
+ uint32_t off, slice_size;
+ uint8_t lru[3][8];
+ int ret;
+
+ ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
+ if (ret < 0)
+ return ret;
+
+ avctx->pix_fmt = fmt;
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+ return ret;
+
+ for (slice = 0; slice < nslices; slice++) {
+ slice_size = bytestream2_get_le32(&gb);
+
+ setup_lru(lru);
+
+ ret = check_slice_size(avctx, src, src_size, slice_size, off);
+ if (ret < 0)
+ return ret;
+
+ bitstream_init8(&bc, src + off + 16, slice_size - 16);
+
+ line += decode_slice(&bc, pic, line, avctx->height - line, lru);
+
+ off += slice_size;
+ }
+
+ if (avctx->height - line) {
+ av_log(avctx, AV_LOG_VERBOSE,
+ "Not enough slice data available, "
+ "cropping the frame by %d pixels\n",
+ avctx->height - line);
+ avctx->height = line;
+ }
+
+ return 0;
+}
+
+av_always_inline
+static int dx2_decode_slice_5x5(BitstreamContext *bc, AVFrame *frame,
+ int line, int left, uint8_t lru[3][8],
+ int is_565)
+{
+ int x, y;
+ int r, g, b;
+ int width = frame->width;
+ int stride = frame->linesize[0];
+ uint8_t *dst = frame->data[0] + stride * line;
+
+ for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {
+ for (x = 0; x < width; x++) {
+ b = decode_sym_565(bc, lru[0], 5);
+ g = decode_sym_565(bc, lru[1], is_565 ? 6 : 5);
+ r = decode_sym_565(bc, lru[2], 5);
+ dst[x * 3 + 0] = (r << 3) | (r >> 2);
+ dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
+ dst[x * 3 + 2] = (b << 3) | (b >> 2);
+ }
+
+ dst += stride;
+ }
+
+ return y;
+}
+
+static void setup_lru_555(uint8_t lru[3][8])
+{
+ memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
+ memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
+ memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
+}
+
+static void setup_lru_565(uint8_t lru[3][8])
+{
+ memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
+ memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
+ memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
+}
+
+static int dx2_decode_slice_555(BitstreamContext *bc, AVFrame *frame,
+ int line, int left, uint8_t lru[3][8])
+{
+ return dx2_decode_slice_5x5(bc, frame, line, left, lru, 0);
+}
+
+static int dx2_decode_slice_565(BitstreamContext *bc, AVFrame *frame,
+ int line, int left, uint8_t lru[3][8])
+{
+ return dx2_decode_slice_5x5(bc, frame, line, left, lru, 1);
+}
+
+static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size, int is_565)
+{
+ enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
+ if (is_565)
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_565,
+ setup_lru_565,
+ fmt);
+ else
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_555,
+ setup_lru_555,
+ fmt);
+}
+
+static int dx2_decode_slice_rgb(BitstreamContext *bc, AVFrame *frame,
+ int line, int left, uint8_t lru[3][8])
+{
+ int x, y;
+ int width = frame->width;
+ int stride = frame->linesize[0];
+ uint8_t *dst = frame->data[0] + stride * line;
+
+ for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {
+ for (x = 0; x < width; x++) {
+ dst[x * 3 + 0] = decode_sym(bc, lru[0]);
+ dst[x * 3 + 1] = decode_sym(bc, lru[1]);
+ dst[x * 3 + 2] = decode_sym(bc, lru[2]);
+ }
+
+ dst += stride;
+ }
+
+ return y;
+}
+
+static void default_setup_lru(uint8_t lru[3][8])
+{
+ int i;
+
+ for (i = 0; i < 3; i++)
+ memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
+}
+
+static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_rgb,
+ default_setup_lru,
+ AV_PIX_FMT_BGR24);
+}
+
+static int dx2_decode_slice_410(BitstreamContext *bc, AVFrame *frame,
+ int line, int left,
+ uint8_t lru[3][8])
+{
+ int x, y, i, j;
+ int width = frame->width;
+
+ int ystride = frame->linesize[0];
+ int ustride = frame->linesize[1];
+ int vstride = frame->linesize[2];
+
+ uint8_t *Y = frame->data[0] + ystride * line;
+ uint8_t *U = frame->data[1] + (ustride >> 2) * line;
+ uint8_t *V = frame->data[2] + (vstride >> 2) * line;
+
+ for (y = 0; y < left - 3 && bitstream_bits_left(bc) > 16; y += 4) {
+ for (x = 0; x < width; x += 4) {
+ for (j = 0; j < 4; j++)
+ for (i = 0; i < 4; i++)
+ Y[x + i + j * ystride] = decode_sym(bc, lru[0]);
+ U[x >> 2] = decode_sym(bc, lru[1]) ^ 0x80;
+ V[x >> 2] = decode_sym(bc, lru[2]) ^ 0x80;
+ }
+
+ Y += ystride << 2;
+ U += ustride;
+ V += vstride;
+ }
+
+ return y;
+}
+
+
+static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_410,
+ default_setup_lru,
+ AV_PIX_FMT_YUV410P);
+}
+
+static int dx2_decode_slice_420(BitstreamContext *bc, AVFrame *frame,
+ int line, int left,
+ uint8_t lru[3][8])
+{
+ int x, y;
+
+ int width = frame->width;
+
+ int ystride = frame->linesize[0];
+ int ustride = frame->linesize[1];
+ int vstride = frame->linesize[2];
+
+ uint8_t *Y = frame->data[0] + ystride * line;
+ uint8_t *U = frame->data[1] + (ustride >> 1) * line;
+ uint8_t *V = frame->data[2] + (vstride >> 1) * line;
+
+
+ for (y = 0; y < left - 1 && bitstream_bits_left(bc) > 16; y += 2) {
+ for (x = 0; x < width; x += 2) {
+ Y[x + 0 + 0 * ystride] = decode_sym(bc, lru[0]);
+ Y[x + 1 + 0 * ystride] = decode_sym(bc, lru[0]);
+ Y[x + 0 + 1 * ystride] = decode_sym(bc, lru[0]);
+ Y[x + 1 + 1 * ystride] = decode_sym(bc, lru[0]);
+ U[x >> 1] = decode_sym(bc, lru[1]) ^ 0x80;
+ V[x >> 1] = decode_sym(bc, lru[2]) ^ 0x80;
+ }
+
+ Y += ystride << 1;
+ U += ustride;
+ V += vstride;
+ }
+
+ return y;
+}
+
+static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_420,
+ default_setup_lru,
+ AV_PIX_FMT_YUV420P);
+}
+
+static int dx2_decode_slice_444(BitstreamContext *bc, AVFrame *frame,
+ int line, int left,
+ uint8_t lru[3][8])
+{
+ int x, y;
+
+ int width = frame->width;
+
+ int ystride = frame->linesize[0];
+ int ustride = frame->linesize[1];
+ int vstride = frame->linesize[2];
+
+ uint8_t *Y = frame->data[0] + ystride * line;
+ uint8_t *U = frame->data[1] + ustride * line;
+ uint8_t *V = frame->data[2] + vstride * line;
+
+ for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {
+ for (x = 0; x < width; x++) {
+ Y[x] = decode_sym(bc, lru[0]);
+ U[x] = decode_sym(bc, lru[1]) ^ 0x80;
+ V[x] = decode_sym(bc, lru[2]) ^ 0x80;
+ }
+
+ Y += ystride;
+ U += ustride;
+ V += vstride;
+ }
+
+ return y;
+}
+
+static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
+ const uint8_t *src, int src_size)
+{
+ return dxtory_decode_v2(avctx, pic, src, src_size,
+ dx2_decode_slice_444,
+ default_setup_lru,
+ AV_PIX_FMT_YUV444P);
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
+{
+ AVFrame *pic = data;
+ const uint8_t *src = avpkt->data;
+ int ret;
+
+ if (avpkt->size < 16) {
+ av_log(avctx, AV_LOG_ERROR, "packet too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ switch (AV_RB32(src)) {
+ case 0x01000001:
+ ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
+ AV_PIX_FMT_BGR24, 3);
+ break;
+ case 0x01000009:
+ ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x02000001:
+ ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x02000009:
+ ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x03000001:
+ ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x03000009:
+ ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x04000001:
+ ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x04000009:
+ ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
+ break;
+ case 0x17000001:
+ ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
+ AV_PIX_FMT_RGB565LE, 2);
+ break;
+ case 0x17000009:
+ ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
+ break;
+ case 0x18000001:
+ case 0x19000001:
+ ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
+ AV_PIX_FMT_RGB555LE, 2);
+ break;
+ case 0x18000009:
+ case 0x19000009:
+ ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
+ break;
+ default:
+ avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
+ return AVERROR_PATCHWELCOME;
+ }
+
+ if (ret)
+ return ret;
+
+ pic->pict_type = AV_PICTURE_TYPE_I;
+ pic->key_frame = 1;
+ *got_frame = 1;
+
+ return avpkt->size;
+}
+
AVCodec ff_dxtory_decoder = {
.name = "dxtory",
.long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_DXTORY,
- .init = decode_init,
- .close = decode_close,
.decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff