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https://gitee.com/openharmony/third_party_ffmpeg
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Decoding to bgr15/16 from 16bit input. Decoding of 24bit input added, not yet finished, but at least the picture can be recognized
Originally committed as revision 3488 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Beregszaszi
parent
f970a8e682
commit
be441a9eee
@ -24,7 +24,7 @@
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* Mike Melanson (melanson@pcisys.net)
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*
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* The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
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* outputs RGB555 data. 24-bit TM1 data is not supported yet.
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* outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet.
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*/
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#include <stdio.h>
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@ -43,12 +43,12 @@ typedef struct TrueMotion1Context {
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AVFrame frame;
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AVFrame prev_frame;
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unsigned char *buf;
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uint8_t *buf;
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int size;
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unsigned char *mb_change_bits;
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uint8_t *mb_change_bits;
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int mb_change_bits_row_size;
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unsigned char *index_stream;
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uint8_t *index_stream;
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int index_stream_size;
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int flags;
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@ -56,6 +56,8 @@ typedef struct TrueMotion1Context {
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uint32_t y_predictor_table[1024];
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uint32_t c_predictor_table[1024];
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uint32_t fat_y_predictor_table[1024];
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uint32_t fat_c_predictor_table[1024];
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int compression;
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int block_type;
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@ -109,12 +111,12 @@ struct frame_header {
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typedef struct comp_types {
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int algorithm;
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int block_width;
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int block_height;
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int block_width; // vres
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int block_height; // hres
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int block_type;
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} comp_types;
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/* { valid for metatype }, algorithm, num of deltas, horiz res, vert res */
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/* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */
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static comp_types compression_types[17] = {
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{ ALGO_NOP, 0, 0, 0 },
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@ -163,9 +165,9 @@ static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
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}
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#ifdef WORDS_BIGENDIAN
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static int make_ydt_entry(int p2, int p1, int16_t *ydt)
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static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
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#else
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static int make_ydt_entry(int p1, int p2, int16_t *ydt)
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static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
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#endif
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{
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int lo, hi;
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@ -178,9 +180,9 @@ static int make_ydt_entry(int p1, int p2, int16_t *ydt)
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}
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#ifdef WORDS_BIGENDIAN
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static int make_cdt_entry(int p2, int p1, int16_t *cdt)
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static int make_cdt15_entry(int p2, int p1, int16_t *cdt)
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#else
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static int make_cdt_entry(int p1, int p2, int16_t *cdt)
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static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
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#endif
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{
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int r, b, lo;
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@ -191,7 +193,62 @@ static int make_cdt_entry(int p1, int p2, int16_t *cdt)
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return ((lo + (lo << 16)) << 1);
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}
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static void gen_vector_table(TrueMotion1Context *s, uint8_t *sel_vector_table)
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#ifdef WORDS_BIGENDIAN
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static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
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#else
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static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
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#endif
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{
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int lo, hi;
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lo = ydt[p1];
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lo += (lo << 6) + (lo << 11);
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hi = ydt[p2];
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hi += (hi << 6) + (hi << 11);
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return ((lo + (hi << 16)) << 1);
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}
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#ifdef WORDS_BIGENDIAN
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static int make_cdt16_entry(int p2, int p1, int16_t *cdt)
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#else
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static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
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#endif
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{
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int r, b, lo;
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b = cdt[p2];
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r = cdt[p1] << 11;
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lo = b + r;
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return ((lo + (lo << 16)) << 1);
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}
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#ifdef WORDS_BIGENDIAN
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static int make_ydt24_entry(int p2, int p1, int16_t *ydt)
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#else
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static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
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#endif
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{
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int lo, hi;
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lo = ydt[p1];
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hi = ydt[p2];
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return ((lo + (hi << 8)) << 1);
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}
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#ifdef WORDS_BIGENDIAN
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static int make_cdt24_entry(int p2, int p1, int16_t *cdt)
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#else
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static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
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#endif
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{
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int r, b;
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b = cdt[p2];
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r = cdt[p1]<<16;
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return ((b+r) << 1);
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}
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static void gen_vector_table15(TrueMotion1Context *s, uint8_t *sel_vector_table)
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{
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int len, i, j;
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unsigned char delta_pair;
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@ -203,15 +260,63 @@ static void gen_vector_table(TrueMotion1Context *s, uint8_t *sel_vector_table)
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{
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delta_pair = *sel_vector_table++;
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s->y_predictor_table[i+j] = 0xfffffffe &
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make_ydt_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
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make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
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s->c_predictor_table[i+j] = 0xfffffffe &
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make_cdt_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
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make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
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}
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s->y_predictor_table[i+(j-1)] |= 1;
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s->c_predictor_table[i+(j-1)] |= 1;
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}
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}
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static void gen_vector_table16(TrueMotion1Context *s, uint8_t *sel_vector_table)
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{
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int len, i, j;
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unsigned char delta_pair;
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for (i = 0; i < 1024; i += 4)
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{
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len = *sel_vector_table++ / 2;
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for (j = 0; j < len; j++)
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{
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delta_pair = *sel_vector_table++;
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s->y_predictor_table[i+j] = 0xfffffffe &
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make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
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s->c_predictor_table[i+j] = 0xfffffffe &
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make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
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}
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s->y_predictor_table[i+(j-1)] |= 1;
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s->c_predictor_table[i+(j-1)] |= 1;
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}
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}
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static void gen_vector_table24(TrueMotion1Context *s, uint8_t *sel_vector_table)
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{
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int len, i, j;
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unsigned char delta_pair;
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for (i = 0; i < 1024; i += 4)
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{
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len = *sel_vector_table++ / 2;
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for (j = 0; j < len; j++)
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{
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delta_pair = *sel_vector_table++;
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s->y_predictor_table[i+j] = 0xfffffffe &
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make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
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s->c_predictor_table[i+j] = 0xfffffffe &
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make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
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s->fat_y_predictor_table[i+j] = 0xfffffffe &
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make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
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s->fat_c_predictor_table[i+j] = 0xfffffffe &
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make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
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}
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s->y_predictor_table[i+(j-1)] |= 1;
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s->c_predictor_table[i+(j-1)] |= 1;
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s->fat_y_predictor_table[i+(j-1)] |= 1;
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s->fat_c_predictor_table[i+(j-1)] |= 1;
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}
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}
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/* Returns the number of bytes consumed from the bytestream. Returns -1 if
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* there was an error while decoding the header */
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static int truemotion1_decode_header(TrueMotion1Context *s)
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@ -229,7 +334,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
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if (s->buf[0] < 0x10)
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{
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av_log(s->avctx, AV_LOG_ERROR, "invalid header size\n");
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av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
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return -1;
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}
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@ -237,6 +342,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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memset(header_buffer, 0, 128);
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for (i = 1; i < header.header_size; i++)
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header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
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header.compression = header_buffer[0];
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header.deltaset = header_buffer[1];
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header.vectable = header_buffer[2];
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@ -253,7 +359,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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{
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if (header.header_type > 3)
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{
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av_log(s->avctx, AV_LOG_ERROR, "truemotion1: invalid header type\n");
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av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
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return -1;
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} else if ((header.header_type == 2) || (header.header_type == 3)) {
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s->flags = header.flags;
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@ -265,6 +371,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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s->flags = FLAG_KEYFRAME;
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if (s->flags & FLAG_SPRITE) {
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av_log(s->avctx, AV_LOG_INFO, "SPRITE frame found, please report the sample to the developers\n");
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s->w = header.width;
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s->h = header.height;
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s->x = header.xoffset;
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@ -274,7 +381,10 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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s->h = header.ysize;
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if (header.header_type < 2) {
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if ((s->w < 213) && (s->h >= 176))
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{
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s->flags |= FLAG_INTERPOLATED;
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av_log(s->avctx, AV_LOG_INFO, "INTERPOLATION selected, please report the sample to the developers\n");
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}
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}
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}
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@ -298,14 +408,21 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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}
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}
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// FIXME: where to place this ?!?!
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if (compression_types[header.compression].algorithm == ALGO_RGB24H)
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s->avctx->pix_fmt = PIX_FMT_BGR24;
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else
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s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported aswell
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if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
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{
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if (compression_types[header.compression].algorithm == ALGO_RGB24H)
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{
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av_log(s->avctx, AV_LOG_ERROR, "24bit compression not yet supported\n");
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}
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gen_vector_table24(s, sel_vector_table);
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else
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gen_vector_table(s, sel_vector_table);
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if (s->avctx->pix_fmt == PIX_FMT_RGB555)
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gen_vector_table15(s, sel_vector_table);
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else
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gen_vector_table16(s, sel_vector_table);
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}
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/* set up pointers to the other key data chunks */
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@ -327,6 +444,15 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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s->block_height = compression_types[header.compression].block_height;
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s->block_type = compression_types[header.compression].block_type;
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if (s->avctx->debug & FF_DEBUG_PICT_INFO)
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av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
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s->last_deltaset, s->last_vectable, s->compression, s->block_width,
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s->block_height, s->block_type,
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s->flags & FLAG_KEYFRAME ? " KEY" : "",
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s->flags & FLAG_INTERFRAME ? " INTER" : "",
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s->flags & FLAG_SPRITE ? " SPRITE" : "",
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s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
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return header.header_size;
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}
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@ -336,7 +462,12 @@ static int truemotion1_decode_init(AVCodecContext *avctx)
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s->avctx = avctx;
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avctx->pix_fmt = PIX_FMT_RGB555;
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// FIXME: it may change ?
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// if (avctx->bits_per_sample == 24)
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// avctx->pix_fmt = PIX_FMT_RGB24;
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// else
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// avctx->pix_fmt = PIX_FMT_RGB555;
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avctx->has_b_frames = 0;
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s->frame.data[0] = s->prev_frame.data[0] = NULL;
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@ -348,6 +479,32 @@ static int truemotion1_decode_init(AVCodecContext *avctx)
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return 0;
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}
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/*
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Block decoding order:
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dxi: Y-Y
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dxic: Y-C-Y
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dxic2: Y-C-Y-C
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hres,vres,i,i%vres (0 < i < 4)
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2x2 0: 0 dxic2
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2x2 1: 1 dxi
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2x2 2: 0 dxic2
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2x2 3: 1 dxi
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2x4 0: 0 dxic2
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2x4 1: 1 dxi
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2x4 2: 2 dxi
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2x4 3: 3 dxi
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4x2 0: 0 dxic
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4x2 1: 1 dxi
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4x2 2: 0 dxic
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4x2 3: 1 dxi
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4x4 0: 0 dxic
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4x4 1: 1 dxi
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4x4 2: 2 dxi
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4x4 3: 3 dxi
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*/
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#define GET_NEXT_INDEX() \
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{\
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if (index_stream_index >= s->index_stream_size) { \
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@ -374,6 +531,25 @@ static int truemotion1_decode_init(AVCodecContext *avctx)
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} else \
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index++;
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#define APPLY_C_PREDICTOR_24() \
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predictor_pair = s->c_predictor_table[index]; \
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c_horiz_pred += (predictor_pair >> 1); \
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if (predictor_pair & 1) { \
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GET_NEXT_INDEX() \
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if (!index) { \
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GET_NEXT_INDEX() \
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predictor_pair = s->fat_c_predictor_table[index]; \
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c_horiz_pred += (predictor_pair >> 1); \
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if (predictor_pair & 1) \
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GET_NEXT_INDEX() \
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else \
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index++; \
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} \
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} else \
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index++;
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// c_last+coff = clast+c_horiz_pred;
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#define APPLY_Y_PREDICTOR() \
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predictor_pair = s->y_predictor_table[index]; \
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horiz_pred += (predictor_pair >> 1); \
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@ -391,6 +567,23 @@ static int truemotion1_decode_init(AVCodecContext *avctx)
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} else \
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index++;
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#define APPLY_Y_PREDICTOR_24() \
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predictor_pair = s->y_predictor_table[index]; \
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horiz_pred += (predictor_pair >> 1); \
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if (predictor_pair & 1) { \
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GET_NEXT_INDEX() \
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if (!index) { \
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GET_NEXT_INDEX() \
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predictor_pair = s->fat_y_predictor_table[index]; \
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horiz_pred += (predictor_pair >> 1); \
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if (predictor_pair & 1) \
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GET_NEXT_INDEX() \
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else \
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index++; \
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} \
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} else \
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index++;
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#define OUTPUT_PIXEL_PAIR() \
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*current_pixel_pair = *vert_pred + horiz_pred; \
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*vert_pred++ = *current_pixel_pair++; \
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@ -528,6 +721,149 @@ static void truemotion1_decode_16bit(TrueMotion1Context *s)
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}
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}
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static void truemotion1_decode_24bit(TrueMotion1Context *s)
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{
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int y;
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int pixels_left; /* remaining pixels on this line */
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unsigned int predictor_pair;
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unsigned int horiz_pred;
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unsigned int c_horiz_pred;
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unsigned int *vert_pred;
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unsigned int *current_pixel_pair;
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unsigned int *prev_pixel_pair;
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unsigned char *current_line = s->frame.data[0];
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unsigned char *prev_line = s->prev_frame.data[0];
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int keyframe = s->flags & FLAG_KEYFRAME;
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/* these variables are for managing the stream of macroblock change bits */
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unsigned char *mb_change_bits = s->mb_change_bits;
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unsigned char mb_change_byte;
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unsigned char mb_change_byte_mask;
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int mb_change_index;
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/* these variables are for managing the main index stream */
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int index_stream_index = 0; /* yes, the index into the index stream */
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int index;
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/* clean out the line buffer */
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memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned short));
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GET_NEXT_INDEX();
|
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|
||||
for (y = 0; y < s->avctx->height; y++) {
|
||||
|
||||
/* re-init variables for the next line iteration */
|
||||
horiz_pred = c_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++];
|
||||
mb_change_byte_mask = 0x01;
|
||||
pixels_left = s->avctx->width;
|
||||
|
||||
while (pixels_left > 0) {
|
||||
|
||||
if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
|
||||
|
||||
switch (y & 3) {
|
||||
case 0:
|
||||
/* if macroblock width is 2, apply C-Y-C-Y; else
|
||||
* apply C-Y-Y */
|
||||
if (s->block_width == 2) {
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
} else {
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
}
|
||||
break;
|
||||
|
||||
case 1:
|
||||
case 3:
|
||||
/* always apply 2 Y predictors on these iterations */
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
break;
|
||||
|
||||
case 2:
|
||||
/* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
|
||||
* depending on the macroblock type */
|
||||
if (s->block_type == BLOCK_2x2) {
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
} else if (s->block_type == BLOCK_4x2) {
|
||||
APPLY_C_PREDICTOR_24();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
// OUTPUT_PIXEL_PAIR_24_C();
|
||||
} else {
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
APPLY_Y_PREDICTOR_24();
|
||||
OUTPUT_PIXEL_PAIR();
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
/* 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;
|
||||
// c_horiz_pred = *current_pixel_pair - *vert_pred;
|
||||
*vert_pred++ = *current_pixel_pair++;
|
||||
|
||||
}
|
||||
|
||||
if (!keyframe) {
|
||||
mb_change_byte_mask <<= 1;
|
||||
|
||||
/* next byte */
|
||||
if (!mb_change_byte_mask) {
|
||||
mb_change_byte = mb_change_bits[mb_change_index++];
|
||||
mb_change_byte_mask = 0x01;
|
||||
}
|
||||
}
|
||||
|
||||
pixels_left -= 4;
|
||||
}
|
||||
|
||||
/* next change row */
|
||||
if (((y + 1) & 3) == 0)
|
||||
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)
|
||||
@ -537,12 +873,6 @@ static int truemotion1_decode_frame(AVCodecContext *avctx,
|
||||
s->buf = buf;
|
||||
s->size = buf_size;
|
||||
|
||||
s->frame.reference = 1;
|
||||
if (avctx->get_buffer(avctx, &s->frame) < 0) {
|
||||
av_log(s->avctx, AV_LOG_ERROR, "truemotion1: get_buffer() failed\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* no supplementary picture */
|
||||
if (buf_size == 0)
|
||||
return 0;
|
||||
@ -550,13 +880,19 @@ static int truemotion1_decode_frame(AVCodecContext *avctx,
|
||||
if (truemotion1_decode_header(s) == -1)
|
||||
return -1;
|
||||
|
||||
s->frame.reference = 1;
|
||||
if (avctx->get_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) {
|
||||
av_log(s->avctx, AV_LOG_ERROR, "24bit compression not yet supported\n");
|
||||
truemotion1_decode_24bit(s);
|
||||
} else {
|
||||
truemotion1_decode_16bit(s);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user