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NTSC video is now 59.9487437186, thanks Bisqwit for code to get sample generation amount correct.

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This commit is contained in:
n-a-c-h
2005-11-23 23:45:18 +00:00
parent 65bbc4be2e
commit 5ba956cdf6
1 changed files with 42 additions and 1 deletions
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43
zsnes/src/zmovie.c
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@@ -47,6 +47,12 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#define mkdir(path) mkdir(path, (S_IRWXU|S_IRWXG|S_IRWXO)) //0777
#endif
#ifdef __GNUC__
typedef unsigned long long uint64;
#else //MSVC
typedef unsigned __int64 uint64;
#endif
extern unsigned int versionNumber, CRC32, cur_zst_size, MsgCount, MessageOn;
extern unsigned int JoyAOrig, JoyBOrig, JoyCOrig, JoyDOrig, JoyEOrig;
extern unsigned char pl1contrl, pl2contrl, pl3contrl, pl4contrl, pl5contrl;
@@ -1847,6 +1853,15 @@ Code for dumping raw video
#define RAW_FRAME_SIZE (RAW_WIDTH*RAW_HEIGHT)
#define RAW_PIXEL_FRAME_SIZE (RAW_FRAME_SIZE*RAW_PIXEL_SIZE)
//NTSC FPS is 59.9487437186 in AVI that's a fraction of 59649/995
//FPS = 64000 / Samples per Frame
//These two numbers help with calculating how many samples are needed per frame
//59.9487437186 = SAMPLE_NTSC_HI*32000/SAMPLE_NTSC_LO *2
#define SAMPLE_NTSC_HI 31840000ULL
#define SAMPLE_NTSC_LO 59649ULL
//0 = None; 1 Logging, but not now, 2 Log now
unsigned char AudioLogging;
@@ -1859,7 +1874,12 @@ struct
FILE *ap;
unsigned short *sample_buffer;
size_t sample_index;
size_t aud_dsize_pos;
//These next three are only used for NTSC videos to keep sample rate correct
uint64 sample_ntsc_hi;
uint64 sample_ntsc_lo;
uint64 sample_ntsc_balance;
} raw_vid;
static void raw_video_close()
@@ -1936,6 +1956,13 @@ static bool raw_video_open(const char *video_filename, const char *audio_filenam
raw_vid.aud_dsize_pos = ftell(raw_vid.ap); //Save current position for use later
fwrite4(~0, raw_vid.ap); //data size - unknown till file close
if (!romispal)
{
raw_vid.sample_ntsc_hi = SAMPLE_NTSC_HI;
raw_vid.sample_ntsc_lo = SAMPLE_NTSC_LO;
raw_vid.sample_ntsc_balance = SAMPLE_NTSC_HI;
}
AudioLogging = 1;
return(true);
}
@@ -1946,6 +1973,9 @@ static bool raw_video_open(const char *video_filename, const char *audio_filenam
return(false);
}
//Used by raw videos for calculating sample rate in NTSC mode
//Code by Bisqwit
#define PIXEL (vidbuffer[(i*288) + j + 16])
static void raw_video_write_frame()
{
@@ -1981,7 +2011,18 @@ static void raw_video_write_frame()
extern unsigned int BufferSizeB, BufferSizeW;
int i = 0, temp;
BufferSizeB = romispal ? 1280 : 1068;
if (romispal)
{
BufferSizeB = 1280;
}
else
{
//Thanks Bisqwit for this algorithm
BufferSizeB = (raw_vid.sample_ntsc_balance/raw_vid.sample_ntsc_lo) << 1;
raw_vid.sample_ntsc_balance %= raw_vid.sample_ntsc_lo;
raw_vid.sample_ntsc_balance += raw_vid.sample_ntsc_hi;
printf("Frame %u: %u samples\n", raw_vid.frame_index, BufferSizeB);
}
BufferSizeW = BufferSizeB<<1;
AudioLogging = 2;