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24 #define BITSTREAM_READER_LE
41 2, -3, 8, -8, 18, -18, 36, -36,
45 1, -1, 2, -3, 8, -8, 18, -18, 36, -36, 54, -54, 96, -96, 144, -144,
58 uint8_t header_buffer[128] = { 0 };
59 const uint8_t *buf = avpkt->
data;
69 header_size = ((buf[0] >> 5) | (buf[0] << 3)) & 0x7f;
70 if (header_size < 10) {
75 if (header_size + 1 >
size) {
81 for (
i = 1;
i < header_size;
i++)
82 header_buffer[
i - 1] = buf[
i] ^ buf[
i + 1];
84 s->delta_size = header_buffer[1];
85 s->hscale = 1 + !!header_buffer[3];
86 if (
s->delta_size < 2 ||
s->delta_size > 4)
106 int x, y, delta_mode;
113 if ((avctx->
width +
s->hscale - 1)/
s->hscale * avctx->
height *
s->delta_size > avpkt->
size * 8LL * 4)
125 delta_mode =
s->delta_size - 2;
127 for (y = 0; y < avctx->
height; y++) {
129 for (x = 0; x < avctx->
width; x +=
s->hscale) {
138 for (y = 0; y < avctx->
height; y++) {
139 for (x = 1; x < avctx->
width; x +=
s->hscale)
146 for (y = 0; y < avctx->
height; y++) {
147 for (x = 0; x < avctx->
width; x++)
153 for (y = 0; y < avctx->
height >> 2; y++) {
155 for (x = 0; x < avctx->
width >> 2; x +=
s->hscale) {
164 for (y = 0; y < avctx->
height >> 2; y++) {
165 for (x = 1; x < avctx->
width >> 2; x +=
s->hscale)
172 for (y = 0; y < avctx->
height >> 2; y++) {
173 for (x = 0; x < avctx->
width >> 2; x++)
174 dst[x] += (dst[x] - 128) / 8;
179 for (y = 0; y < avctx->
height >> 2; y++) {
181 for (x = 0; x < avctx->
width >> 2; x +=
s->hscale) {
190 for (y = 0; y < avctx->
height >> 2; y++) {
191 for (x = 1; x < avctx->
width >> 2; x +=
s->hscale)
198 for (y = 0; y < avctx->
height >> 2; y++) {
199 for (x = 0; x < avctx->
width >> 2; x++)
200 dst[x] += (dst[x] - 128) / 8;
216 .
p.
name =
"truemotion2rt",
@ AV_CODEC_ID_TRUEMOTION2RT
This structure describes decoded (raw) audio or video data.
static const int16_t *const delta_tabs[]
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static void skip_bits(GetBitContext *s, int n)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
AVCodec p
The public AVCodec.
const FFCodec ff_truemotion2rt_decoder
static const int16_t delta_tab2[]
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
#define FF_CODEC_DECODE_CB(func)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
#define CODEC_LONG_NAME(str)
static const int16_t delta_tab4[]
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
int(* init)(AVBSFContext *ctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
static av_always_inline int diff(const struct color_info *a, const struct color_info *b, const int trans_thresh)
static const int16_t delta_tab3[]
#define i(width, name, range_min, range_max)
static int truemotion2rt_decode_header(AVCodecContext *avctx, const AVPacket *avpkt)
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
main external API structure.
static int truemotion2rt_decode_frame(AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)
This structure stores compressed data.
int width
picture width / height.
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static av_cold int truemotion2rt_decode_init(AVCodecContext *avctx)