* 4XM codec.
*/
+#include "libavutil/frame.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "dsputil.h"
#include "get_bits.h"
+#include "internal.h"
//#undef NDEBUG
//#include <assert.h>
typedef struct FourXContext {
AVCodecContext *avctx;
DSPContext dsp;
- AVFrame current_picture, last_picture;
+ AVFrame *last_picture;
GetBitContext pre_gb; ///< ac/dc prefix
GetBitContext gb;
GetByteContext g;
int mv[256];
VLC pre_vlc;
int last_dc;
- DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
+ DECLARE_ALIGNED(16, int16_t, block)[6][64];
void *bitstream_buffer;
unsigned int bitstream_buffer_size;
int version;
#define MULTIPLY(var, const) (((var) * (const)) >> 16)
-static void idct(DCTELEM block[64])
+static void idct(int16_t block[64])
{
int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int tmp10, tmp11, tmp12, tmp13;
}
}
-static void init_mv(FourXContext *f)
+static void init_mv(FourXContext *f, int linesize)
{
int i;
for (i = 0; i < 256; i++) {
if (f->version > 1)
- f->mv[i] = mv[i][0] + mv[i][1] * f->current_picture.linesize[0] / 2;
+ f->mv[i] = mv[i][0] + mv[i][1] * linesize / 2;
else
- f->mv[i] = (i & 15) - 8 + ((i >> 4) - 8) * f->current_picture.linesize[0] / 2;
+ f->mv[i] = (i & 15) - 8 + ((i >> 4) - 8) * linesize / 2;
}
}
int code = get_vlc2(&f->gb,
block_type_vlc[1 - (f->version > 1)][index].table,
BLOCK_TYPE_VLC_BITS, 1);
- uint16_t *start = (uint16_t *)f->last_picture.data[0];
+ uint16_t *start = (uint16_t *)f->last_picture->data[0];
uint16_t *end = start + stride * (f->avctx->height - h + 1) - (1 << log2w);
assert(code >= 0 && code <= 6);
}
}
-static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length)
+static int decode_p_frame(FourXContext *f, AVFrame *frame,
+ const uint8_t *buf, int length)
{
int x, y;
const int width = f->avctx->width;
const int height = f->avctx->height;
- uint16_t *src = (uint16_t *)f->last_picture.data[0];
- uint16_t *dst = (uint16_t *)f->current_picture.data[0];
- const int stride = f->current_picture.linesize[0] >> 1;
+ uint16_t *src = (uint16_t *)f->last_picture->data[0];
+ uint16_t *dst = (uint16_t *)frame->data[0];
+ const int stride = frame->linesize[0] >> 1;
unsigned int bitstream_size, bytestream_size, wordstream_size, extra,
bytestream_offset, wordstream_offset;
av_log(f->avctx, AV_LOG_ERROR, "lengths %d %d %d %d\n",
bitstream_size, bytestream_size, wordstream_size,
bitstream_size + bytestream_size + wordstream_size - length);
- return -1;
+ return AVERROR_INVALIDDATA;
}
av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size,
bytestream2_init(&f->g, buf + bytestream_offset,
length - bytestream_offset);
- init_mv(f);
+ init_mv(f, frame->linesize[0]);
for (y = 0; y < height; y += 8) {
for (x = 0; x < width; x += 8)
* decode block and dequantize.
* Note this is almost identical to MJPEG.
*/
-static int decode_i_block(FourXContext *f, DCTELEM *block)
+static int decode_i_block(FourXContext *f, int16_t *block)
{
int code, i, j, level, val;
return 0;
}
-static inline void idct_put(FourXContext *f, int x, int y)
+static inline void idct_put(FourXContext *f, AVFrame *frame, int x, int y)
{
- DCTELEM (*block)[64] = f->block;
- int stride = f->current_picture.linesize[0] >> 1;
+ int16_t (*block)[64] = f->block;
+ int stride = frame->linesize[0] >> 1;
int i;
- uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x;
+ uint16_t *dst = ((uint16_t*)frame->data[0]) + y * stride + x;
for (i = 0; i < 4; i++) {
block[i][0] += 0x80 * 8 * 8;
* cr = (-1b - 4g + 5r) / 14 */
for (y = 0; y < 8; y++) {
for (x = 0; x < 8; x++) {
- DCTELEM *temp = block[(x >> 2) + 2 * (y >> 2)] +
+ int16_t *temp = block[(x >> 2) + 2 * (y >> 2)] +
2 * (x & 3) + 2 * 8 * (y & 3); // FIXME optimize
int cb = block[4][x + 8 * y];
int cr = block[5][x + 8 * y];
static int decode_i_mb(FourXContext *f)
{
+ int ret;
int i;
f->dsp.clear_blocks(f->block[0]);
for (i = 0; i < 6; i++)
- if (decode_i_block(f, f->block[i]) < 0)
- return -1;
+ if ((ret = decode_i_block(f, f->block[i])) < 0)
+ return ret;
return 0;
}
return red / 3 * 1024 + green / 3 * 32 + blue / 3;
}
-static int decode_i2_frame(FourXContext *f, const uint8_t *buf, int length)
+static int decode_i2_frame(FourXContext *f, AVFrame *frame, const uint8_t *buf, int length)
{
int x, y, x2, y2;
const int width = f->avctx->width;
const int height = f->avctx->height;
const int mbs = (FFALIGN(width, 16) >> 4) * (FFALIGN(height, 16) >> 4);
- uint16_t *dst = (uint16_t*)f->current_picture.data[0];
- const int stride = f->current_picture.linesize[0]>>1;
+ uint16_t *dst = (uint16_t*)frame->data[0];
+ const int stride = frame->linesize[0]>>1;
GetByteContext g3;
if (length < mbs * 8) {
return 0;
}
-static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
+static int decode_i_frame(FourXContext *f, AVFrame *frame, const uint8_t *buf, int length)
{
- int x, y;
+ int x, y, ret;
const int width = f->avctx->width;
const int height = f->avctx->height;
const unsigned int bitstream_size = AV_RL32(buf);
|| prestream_size > (1 << 26)) {
av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n",
prestream_size, bitstream_size, length);
- return -1;
+ return AVERROR_INVALIDDATA;
}
prestream = read_huffman_tables(f, prestream);
+ if (!prestream) {
+ av_log(f->avctx, AV_LOG_ERROR, "Error reading Huffman tables.\n");
+ return AVERROR_INVALIDDATA;
+ }
init_get_bits(&f->gb, buf + 4, 8 * bitstream_size);
for (y = 0; y < height; y += 16) {
for (x = 0; x < width; x += 16) {
- if (decode_i_mb(f) < 0)
- return -1;
+ if ((ret = decode_i_mb(f)) < 0)
+ return ret;
- idct_put(f, x, y);
+ idct_put(f, frame, x, y);
}
}
}
static int decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
FourXContext *const f = avctx->priv_data;
AVFrame *picture = data;
- AVFrame *p, temp;
- int i, frame_4cc, frame_size;
+ int i, frame_4cc, frame_size, ret;
frame_4cc = AV_RL32(buf);
if (buf_size != AV_RL32(buf + 4) + 8 || buf_size < 20)
cfrm->size + data_size + FF_INPUT_BUFFER_PADDING_SIZE);
// explicit check needed as memcpy below might not catch a NULL
if (!cfrm->data) {
- av_log(f->avctx, AV_LOG_ERROR, "realloc falure");
- return -1;
+ av_log(f->avctx, AV_LOG_ERROR, "realloc failure");
+ return AVERROR(ENOMEM);
}
memcpy(cfrm->data + cfrm->size, buf + 20, data_size);
frame_size = buf_size - 12;
}
- temp = f->current_picture;
- f->current_picture = f->last_picture;
- f->last_picture = temp;
-
- p = &f->current_picture;
- avctx->coded_frame = p;
-
// alternatively we would have to use our own buffer management
avctx->flags |= CODEC_FLAG_EMU_EDGE;
- if (p->data[0])
- avctx->release_buffer(avctx, p);
-
- p->reference = 1;
- if (avctx->get_buffer(avctx, p) < 0) {
+ if ((ret = ff_get_buffer(avctx, picture, AV_GET_BUFFER_FLAG_REF)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
if (frame_4cc == AV_RL32("ifr2")) {
- p->pict_type = AV_PICTURE_TYPE_I;
- if (decode_i2_frame(f, buf - 4, frame_size + 4) < 0)
- return -1;
+ picture->pict_type = AV_PICTURE_TYPE_I;
+ if ((ret = decode_i2_frame(f, picture, buf - 4, frame_size + 4)) < 0)
+ return ret;
} else if (frame_4cc == AV_RL32("ifrm")) {
- p->pict_type = AV_PICTURE_TYPE_I;
- if (decode_i_frame(f, buf, frame_size) < 0)
- return -1;
+ picture->pict_type = AV_PICTURE_TYPE_I;
+ if ((ret = decode_i_frame(f, picture, buf, frame_size)) < 0)
+ return ret;
} else if (frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")) {
- if (!f->last_picture.data[0]) {
- f->last_picture.reference = 1;
- if (avctx->get_buffer(avctx, &f->last_picture) < 0) {
+ if (!f->last_picture->data[0]) {
+ if ((ret = ff_get_buffer(avctx, f->last_picture,
+ AV_GET_BUFFER_FLAG_REF)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
+ memset(f->last_picture->data[0], 0, avctx->height * FFABS(f->last_picture->linesize[0]));
}
- p->pict_type = AV_PICTURE_TYPE_P;
- if (decode_p_frame(f, buf, frame_size) < 0)
- return -1;
+ picture->pict_type = AV_PICTURE_TYPE_P;
+ if ((ret = decode_p_frame(f, picture, buf, frame_size)) < 0)
+ return ret;
} else if (frame_4cc == AV_RL32("snd_")) {
av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n",
buf_size);
buf_size);
}
- p->key_frame = p->pict_type == AV_PICTURE_TYPE_I;
+ picture->key_frame = picture->pict_type == AV_PICTURE_TYPE_I;
- *picture = *p;
- *data_size = sizeof(AVPicture);
+ av_frame_unref(f->last_picture);
+ if ((ret = av_frame_ref(f->last_picture, picture)) < 0)
+ return ret;
+ *got_frame = 1;
emms_c();
return buf_size;
}
-
-static av_cold void common_init(AVCodecContext *avctx)
-{
- FourXContext * const f = avctx->priv_data;
-
- ff_dsputil_init(&f->dsp, avctx);
-
- f->avctx = avctx;
-}
-
static av_cold int decode_init(AVCodecContext *avctx)
{
FourXContext * const f = avctx->priv_data;
}
f->version = AV_RL32(avctx->extradata) >> 16;
- common_init(avctx);
+ ff_dsputil_init(&f->dsp, avctx);
+ f->avctx = avctx;
init_vlcs(f);
if (f->version > 2)
- avctx->pix_fmt = PIX_FMT_RGB565;
+ avctx->pix_fmt = AV_PIX_FMT_RGB565;
else
- avctx->pix_fmt = PIX_FMT_BGR555;
+ avctx->pix_fmt = AV_PIX_FMT_BGR555;
+
+ f->last_picture = av_frame_alloc();
+ if (!f->last_picture)
+ return AVERROR(ENOMEM);
return 0;
}
f->cfrm[i].allocated_size = 0;
}
ff_free_vlc(&f->pre_vlc);
- if (f->current_picture.data[0])
- avctx->release_buffer(avctx, &f->current_picture);
- if (f->last_picture.data[0])
- avctx->release_buffer(avctx, &f->last_picture);
+ av_frame_free(&f->last_picture);
return 0;
}
projects / ffmpeg / blobdiff