/**
* @file truemotion1.c
* Duck TrueMotion v1 Video Decoder by
- * Alex Beregszaszi (alex@fsn.hu) and
+ * Alex Beregszaszi and
* Mike Melanson (melanson@pcisys.net)
*
* The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
#include <string.h>
#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
typedef struct TrueMotion1Context {
AVCodecContext *avctx;
AVFrame frame;
- AVFrame prev_frame;
- uint8_t *buf;
+ const uint8_t *buf;
int size;
- uint8_t *mb_change_bits;
+ const uint8_t *mb_change_bits;
int mb_change_bits_row_size;
- uint8_t *index_stream;
+ const uint8_t *index_stream;
int index_stream_size;
int flags;
header.compression = header_buffer[0];
header.deltaset = header_buffer[1];
header.vectable = header_buffer[2];
- header.ysize = LE_16(&header_buffer[3]);
- header.xsize = LE_16(&header_buffer[5]);
- header.checksum = LE_16(&header_buffer[7]);
+ header.ysize = AV_RL16(&header_buffer[3]);
+ header.xsize = AV_RL16(&header_buffer[5]);
+ header.checksum = AV_RL16(&header_buffer[7]);
header.version = header_buffer[9];
header.header_type = header_buffer[10];
header.flags = header_buffer[11];
if (s->flags & FLAG_SPRITE) {
av_log(s->avctx, AV_LOG_INFO, "SPRITE frame found, please report the sample to the developers\n");
+ /* FIXME header.width, height, xoffset and yoffset aren't initialized */
+#if 0
s->w = header.width;
s->h = header.height;
s->x = header.xoffset;
s->y = header.yoffset;
+#else
+ return -1;
+#endif
} else {
s->w = header.xsize;
s->h = header.ysize;
// FIXME: where to place this ?!?!
if (compression_types[header.compression].algorithm == ALGO_RGB24H)
- s->avctx->pix_fmt = PIX_FMT_RGBA32;
+ s->avctx->pix_fmt = PIX_FMT_RGB32;
else
- s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported aswell
+ s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported as well
if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
{
return header.header_size;
}
-static int truemotion1_decode_init(AVCodecContext *avctx)
+static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
{
- TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
+ TrueMotion1Context *s = avctx->priv_data;
s->avctx = avctx;
// else
// avctx->pix_fmt = PIX_FMT_RGB555;
- avctx->has_b_frames = 0;
- s->frame.data[0] = s->prev_frame.data[0] = NULL;
+ s->frame.data[0] = NULL;
/* there is a vertical predictor for each pixel in a line; each vertical
* predictor is 0 to start with */
#define OUTPUT_PIXEL_PAIR() \
*current_pixel_pair = *vert_pred + horiz_pred; \
- *vert_pred++ = *current_pixel_pair++; \
- prev_pixel_pair++;
+ *vert_pred++ = *current_pixel_pair++;
static void truemotion1_decode_16bit(TrueMotion1Context *s)
{
unsigned int horiz_pred;
unsigned int *vert_pred;
unsigned int *current_pixel_pair;
- unsigned int *prev_pixel_pair;
unsigned char *current_line = s->frame.data[0];
- unsigned char *prev_line = s->prev_frame.data[0];
int keyframe = s->flags & FLAG_KEYFRAME;
/* these variables are for managing the stream of macroblock change bits */
- unsigned char *mb_change_bits = s->mb_change_bits;
+ const unsigned char *mb_change_bits = s->mb_change_bits;
unsigned char mb_change_byte;
unsigned char mb_change_byte_mask;
int mb_change_index;
/* re-init variables for the next line iteration */
horiz_pred = 0;
current_pixel_pair = (unsigned int *)current_line;
- prev_pixel_pair = (unsigned int *)prev_line;
vert_pred = s->vert_pred;
mb_change_index = 0;
mb_change_byte = mb_change_bits[mb_change_index++];
/* skip (copy) four pixels, but reassign the horizontal
* predictor */
- *current_pixel_pair = *prev_pixel_pair++;
*vert_pred++ = *current_pixel_pair++;
- *current_pixel_pair = *prev_pixel_pair++;
horiz_pred = *current_pixel_pair - *vert_pred;
*vert_pred++ = *current_pixel_pair++;
mb_change_bits += s->mb_change_bits_row_size;
current_line += s->frame.linesize[0];
- prev_line += s->prev_frame.linesize[0];
}
}
unsigned int horiz_pred;
unsigned int *vert_pred;
unsigned int *current_pixel_pair;
- unsigned int *prev_pixel_pair;
unsigned char *current_line = s->frame.data[0];
- unsigned char *prev_line = s->prev_frame.data[0];
int keyframe = s->flags & FLAG_KEYFRAME;
/* these variables are for managing the stream of macroblock change bits */
- unsigned char *mb_change_bits = s->mb_change_bits;
+ const unsigned char *mb_change_bits = s->mb_change_bits;
unsigned char mb_change_byte;
unsigned char mb_change_byte_mask;
int mb_change_index;
/* re-init variables for the next line iteration */
horiz_pred = 0;
current_pixel_pair = (unsigned int *)current_line;
- prev_pixel_pair = (unsigned int *)prev_line;
vert_pred = s->vert_pred;
mb_change_index = 0;
mb_change_byte = mb_change_bits[mb_change_index++];
/* skip (copy) four pixels, but reassign the horizontal
* predictor */
- *current_pixel_pair = *prev_pixel_pair++;
*vert_pred++ = *current_pixel_pair++;
- *current_pixel_pair = *prev_pixel_pair++;
horiz_pred = *current_pixel_pair - *vert_pred;
*vert_pred++ = *current_pixel_pair++;
mb_change_bits += s->mb_change_bits_row_size;
current_line += s->frame.linesize[0];
- prev_line += s->prev_frame.linesize[0];
}
}
static int truemotion1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
- TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
+ TrueMotion1Context *s = avctx->priv_data;
s->buf = buf;
s->size = buf_size;
return -1;
s->frame.reference = 1;
- if (avctx->get_buffer(avctx, &s->frame) < 0) {
+ s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
+ FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
+ if (avctx->reget_buffer(avctx, &s->frame) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- /* check for a do-nothing frame and copy the previous frame */
- if (compression_types[s->compression].algorithm == ALGO_NOP)
- {
- memcpy(s->frame.data[0], s->prev_frame.data[0],
- s->frame.linesize[0] * s->avctx->height);
- } else if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
+ if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
truemotion1_decode_24bit(s);
- } else {
+ } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
truemotion1_decode_16bit(s);
}
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
-
- /* shuffle frames */
- s->prev_frame = s->frame;
-
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
return buf_size;
}
-static int truemotion1_decode_end(AVCodecContext *avctx)
+static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
{
- TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
+ TrueMotion1Context *s = avctx->priv_data;
- /* release the last frame */
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
av_free(s->vert_pred);
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