diff options
| -rw-r--r-- | Changelog | 2 | ||||
| -rw-r--r-- | doc/ffmpeg-doc.texi | 1 | ||||
| -rw-r--r-- | libavcodec/interplayvideo.c | 920 |
3 files changed, 878 insertions, 45 deletions
@@ -3,7 +3,7 @@ Upcoming version 0.4.8: - Wing Commander III Movie (.mve) file playback subsystem (Mike Melanson and Mario Brito) - Xan DPCM audio decoder (Mario Brito) -- Interplay MVE demuxer and DPCM audio decoder (Mike Melanson) +- Interplay MVE playback subsystem (Mike Melanson) - Duck DK3 and DK4 ADPCM audio decoders (Mike Melanson) version 0.4.7: diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index a49b6d9455..0011ca959b 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -681,6 +681,7 @@ following image formats are supported: @item Sony Playstation MDEC @tab @tab X @item Id RoQ @tab @tab X @tab used in Quake III, Jedi Knight 2, other computer games @item Xan/WC3 @tab @tab X @tab used in Wing Commander III .MVE files +@item Interplay Video @tab @tab X @tab used in Interplay .MVE files @end multitable @code{X} means that the encoding (resp. decoding) is supported. diff --git a/libavcodec/interplayvideo.c b/libavcodec/interplayvideo.c index c94f16f357..372ec0357a 100644 --- a/libavcodec/interplayvideo.c +++ b/libavcodec/interplayvideo.c @@ -19,10 +19,18 @@ */ /** - * @file roqvideo.c - * Interplay MVE Video Decoder by Mike Melanson + * @file interplayvideo.c + * Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net) * For more information about the Interplay MVE format, visit: - * http://www.pcisys.net/~melanson/codecs/ + * http://www.pcisys.net/~melanson/codecs/interplay-mve.txt + * This code is written in such a way that the identifiers match up + * with the encoding descriptions in the document. + * + * This decoder presently only supports a PAL8 output colorspace. + * + * An Interplay video frame consists of 2 parts: The decoding map and + * the video data. A demuxer must load these 2 parts together in a single + * buffer before sending it through the stream to this decoder. */ #include <stdio.h> @@ -34,6 +42,16 @@ #include "avcodec.h" #include "dsputil.h" +#define PALETTE_COUNT 256 + +/* debugging support */ +#define DEBUG_INTERPLAY 0 +#if DEBUG_INTERPLAY +#define debug_interplay printf +#else +static inline void debug_interplay(const char *format, ...) { } +#endif + typedef struct IpvideoContext { AVCodecContext *avctx; @@ -41,30 +59,857 @@ typedef struct IpvideoContext { AVFrame last_frame; AVFrame current_frame; int first_frame; - int receiving_decoding_map; unsigned char *decoding_map; int decoding_map_size; unsigned char *buf; int size; + unsigned char palette[PALETTE_COUNT * 4]; + } IpvideoContext; +#define CHECK_STREAM_PTR(n) \ + if ((sg_stream_ptr + n) > sg_stream_end) { \ + printf ("Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \ + sg_stream_ptr + n, sg_stream_end); \ + return -1; \ + } + +static void ipvideo_new_palette(IpvideoContext *s, unsigned char *palette) { + + int i; + unsigned char r, g, b; + unsigned int *palette32; + + switch (s->avctx->pix_fmt) { + + case PIX_FMT_PAL8: + palette32 = (unsigned int *)s->palette; + for (i = 0; i < PALETTE_COUNT; i++) { + r = *palette++; + g = *palette++; + b = *palette++; + palette32[i] = (r << 16) | (g << 8) | (b); + } + break; + + default: + printf ("Interplay video: Unhandled video format\n"); + break; + } +} + +static unsigned char *sg_stream_ptr; +static unsigned char *sg_stream_end; +static unsigned char *sg_current_plane; +static unsigned char *sg_output_plane; +static unsigned char *sg_last_plane; +static int sg_line_inc; +static int sg_stride; +static int sg_upper_motion_limit_offset; +static DSPContext sg_dsp; + +static int ipvideo_decode_block_opcode_0x0_0x1(void) +{ + int x, y; + unsigned char *src_block; + + /* skip block, which actually means to copy from previous frame */ + src_block = sg_last_plane + (sg_output_plane - sg_current_plane); + for (y = 0; y < 8; y++) { + for (x = 0; x < 8; x++) { + *sg_output_plane++ = *src_block++; + } + sg_output_plane += sg_line_inc; + src_block += sg_line_inc; + } + + /* report success */ + return 0; +} + +#define COPY_FROM_CURRENT() \ + motion_offset = current_offset; \ + motion_offset += y * sg_stride; \ + motion_offset += x; \ + if (motion_offset < 0) { \ + printf (" Interplay video: motion offset < 0 (%d)\n", motion_offset); \ + return -1; \ + } else if (motion_offset > sg_upper_motion_limit_offset) { \ + printf (" Interplay video: motion offset above limit (%d >= %d)\n", \ + motion_offset, sg_upper_motion_limit_offset); \ + return -1; \ + } \ + sg_dsp.put_pixels_tab[0][0](sg_output_plane, \ + sg_current_plane + motion_offset, sg_stride, 8); + +#define COPY_FROM_PREVIOUS() \ + motion_offset = current_offset; \ + motion_offset += y * sg_stride; \ + motion_offset += x; \ + if (motion_offset < 0) { \ + printf (" Interplay video: motion offset < 0 (%d)\n", motion_offset); \ + return -1; \ + } else if (motion_offset > sg_upper_motion_limit_offset) { \ + printf (" Interplay video: motion offset above limit (%d >= %d)\n", \ + motion_offset, sg_upper_motion_limit_offset); \ + return -1; \ + } \ + sg_dsp.put_pixels_tab[0][0](sg_output_plane, \ + sg_last_plane + motion_offset, sg_stride, 8); + +static int ipvideo_decode_block_opcode_0x2(void) +{ + unsigned char B; + int x, y; + int motion_offset; + int current_offset = sg_output_plane - sg_current_plane; + + /* This is the opcode which claims to copy data from within the same + * frame at a coordinate which has not been rendered yet. Assume that + * it is supposed to be copied from the previous frame. */ + + /* need 1 more byte for motion */ + CHECK_STREAM_PTR(1); + B = *sg_stream_ptr++; + + if (B < 56) { + x = 8 + (B % 7); + y = B / 7; + } else { + x = -14 + ((B - 56) % 29); + y = 8 + ((B - 56) / 29); + } + + debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); + COPY_FROM_PREVIOUS(); + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x3(void) +{ + unsigned char B; + int x, y; + int motion_offset; + int current_offset = sg_output_plane - sg_current_plane; + + /* copy 8x8 block from current frame from an up/left block */ + + /* need 1 more byte for motion */ + CHECK_STREAM_PTR(1); + B = *sg_stream_ptr++; + + if (B < 56) { + x = -(8 + (B % 7)); + y = -(B / 7); + } else { + x = -(-14 + ((B - 56) % 29)); + y = -( 8 + ((B - 56) / 29)); + } + + debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); + COPY_FROM_CURRENT(); + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x4(void) +{ + int x, y; + unsigned char B, BL, BH; + int motion_offset; + int current_offset = sg_output_plane - sg_current_plane; + + /* copy a block from the previous frame; need 1 more byte */ + CHECK_STREAM_PTR(1); + + B = *sg_stream_ptr++; + BL = B & 0x0F; + BH = (B >> 4) & 0x0F; + x = -8 + BL; + y = -8 + BH; + + debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); + COPY_FROM_PREVIOUS(); + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x5(void) +{ + signed char x, y; + int motion_offset; + int current_offset = sg_output_plane - sg_current_plane; + + /* copy a block from the previous frame using an expanded range; + * need 2 more bytes */ + CHECK_STREAM_PTR(2); + + x = *sg_stream_ptr++; + y = *sg_stream_ptr++; + + debug_interplay (" motion bytes = %d, %d\n", x, y); + COPY_FROM_PREVIOUS(); + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x6(void) +{ + /* mystery opcode? skip multiple blocks? */ + printf (" Interplay video: Help! Mystery opcode 0x6 seen\n"); + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x7(void) +{ + int x, y; + unsigned char P0, P1; + unsigned char B[8]; + unsigned int flags; + int bitmask; + + /* 2-color encoding */ + CHECK_STREAM_PTR(2); + + P0 = *sg_stream_ptr++; + P1 = *sg_stream_ptr++; + + if (P0 <= P1) { + + /* need 8 more bytes from the stream */ + CHECK_STREAM_PTR(8); + for (y = 0; y < 8; y++) + B[y] = *sg_stream_ptr++; + + for (y = 0; y < 8; y++) { + flags = B[y]; + for (x = 0x80; x != 0; x >>= 1) { + if (flags & x) + *sg_output_plane++ = P1; + else + *sg_output_plane++ = P0; + } + sg_output_plane += sg_line_inc; + } + + } else { + + /* need 2 more bytes from the stream */ + CHECK_STREAM_PTR(2); + B[0] = *sg_stream_ptr++; + B[1] = *sg_stream_ptr++; + + flags = (B[0] << 8) | B[1]; + bitmask = 0x8000; + for (y = 0; y < 8; y += 2) { + for (x = 0; x < 8; x += 2, bitmask >>= 1) { + if (flags & bitmask) { + *(sg_output_plane + x) = P0; + *(sg_output_plane + x + 1) = P0; + *(sg_output_plane + sg_stride + x) = P0; + *(sg_output_plane + sg_stride + x + 1) = P0; + } else { + *(sg_output_plane + x) = P1; + *(sg_output_plane + x + 1) = P1; + *(sg_output_plane + sg_stride + x) = P1; + *(sg_output_plane + sg_stride + x + 1) = P1; + } + } + sg_output_plane += sg_stride * 2; + } + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x8(void) +{ + int x, y; + unsigned char P[8]; + unsigned char B[8]; + unsigned int flags = 0; + unsigned int bitmask = 0; + unsigned char P0 = 0, P1 = 0; + int lower_half = 0; + + /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on + * either top and bottom or left and right halves */ + CHECK_STREAM_PTR(2); + + P[0] = *sg_stream_ptr++; + P[1] = *sg_stream_ptr++; + + if (P[0] <= P[1]) { + + /* need 12 more bytes */ + CHECK_STREAM_PTR(12); + B[0] = *sg_stream_ptr++; B[1] = *sg_stream_ptr++; + P[2] = *sg_stream_ptr++; P[3] = *sg_stream_ptr++; + B[2] = *sg_stream_ptr++; B[3] = *sg_stream_ptr++; + P[4] = *sg_stream_ptr++; P[5] = *sg_stream_ptr++; + B[4] = *sg_stream_ptr++; B[5] = *sg_stream_ptr++; + P[6] = *sg_stream_ptr++; P[7] = *sg_stream_ptr++; + B[6] = *sg_stream_ptr++; B[7] = *sg_stream_ptr++; + + for (y = 0; y < 8; y++) { + + /* time to reload flags? */ + if (y == 0) { + flags = + ((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) | + ((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) | + ((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) | + ((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0); + bitmask = 0x80000000; + lower_half = 0; /* still on top half */ + } else if (y == 4) { + flags = + ((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) | + ((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) | + ((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) | + ((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0); + bitmask = 0x80000000; + lower_half = 4; + } + + for (x = 0; x < 8; x++, bitmask >>= 1) { + /* get the pixel values ready for this quadrant */ + if (x == 0) { + P0 = P[lower_half + 0]; + P1 = P[lower_half + 1]; + } else if (x == 4) { + P0 = P[lower_half + 2]; + P1 = P[lower_half + 3]; + } + + if (flags & bitmask) + *sg_output_plane++ = P1; + else + *sg_output_plane++ = P0; + } + sg_output_plane += sg_line_inc; + } + + } else { + + /* need 10 more bytes */ + CHECK_STREAM_PTR(10); + B[0] = *sg_stream_ptr++; B[1] = *sg_stream_ptr++; + B[2] = *sg_stream_ptr++; B[3] = *sg_stream_ptr++; + P[2] = *sg_stream_ptr++; P[3] = *sg_stream_ptr++; + B[4] = *sg_stream_ptr++; B[5] = *sg_stream_ptr++; + B[6] = *sg_stream_ptr++; B[7] = *sg_stream_ptr++; + + if (P[2] <= P[3]) { + + /* vertical split; left & right halves are 2-color encoded */ + + for (y = 0; y < 8; y++) { + + /* time to reload flags? */ + if (y == 0) { + flags = + ((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) | + ((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) | + ((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) | + ((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0); + bitmask = 0x80000000; + } else if (y == 4) { + flags = + ((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) | + ((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) | + ((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) | + ((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0); + bitmask = 0x80000000; + } + + for (x = 0; x < 8; x++, bitmask >>= 1) { + /* get the pixel values ready for this half */ + if (x == 0) { + P0 = P[0]; + P1 = P[1]; + } else if (x == 4) { + P0 = P[2]; + P1 = P[3]; + } + + if (flags & bitmask) + *sg_output_plane++ = P0; + else + *sg_output_plane++ = P1; + } + sg_output_plane += sg_line_inc; + } + + } else { + + /* horizontal split; top & bottom halves are 2-color encoded */ + + for (y = 0; y < 8; y++) { + + flags = B[y]; + if (y == 0) { + P0 = P[0]; + P1 = P[1]; + } else if (y == 4) { + P0 = P[2]; + P1 = P[3]; + } + + for (bitmask = 0x80; bitmask != 0; bitmask >>= 1) { + + if (flags & bitmask) + *sg_output_plane++ = P0; + else + *sg_output_plane++ = P1; + } + sg_output_plane += sg_line_inc; + } + } + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0x9(void) +{ + int x, y; + unsigned char P[4]; + unsigned int flags = 0; + int shifter = 0; + unsigned char pix; + + /* 4-color encoding */ + CHECK_STREAM_PTR(4); + + for (y = 0; y < 4; y++) + P[y] = *sg_stream_ptr++; + + if ((P[0] <= P[1]) && (P[2] <= P[3])) { + + /* 1 of 4 colors for each pixel, need 16 more bytes */ + CHECK_STREAM_PTR(16); + + for (y = 0; y < 8; y++) { + /* get the next set of 8 2-bit flags */ + flags = (sg_stream_ptr[0] << 8) | sg_stream_ptr[1]; + sg_stream_ptr += 2; + for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) { + *sg_output_plane++ = P[(flags >> shifter) & 0x03]; + } + sg_output_plane += sg_line_inc; + } + + } else if ((P[0] <= P[1]) && (P[2] > P[3])) { + + /* 1 of 4 colors for each 2x2 block, need 4 more bytes */ + CHECK_STREAM_PTR(4); + + flags = 0; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + shifter = 30; + + for (y = 0; y < 8; y += 2) { + for (x = 0; x < 8; x += 2, shifter -= 2) { + pix = P[(flags >> shifter) & 0x03]; + *(sg_output_plane + x) = pix; + *(sg_output_plane + x + 1) = pix; + *(sg_output_plane + sg_stride + x) = pix; + *(sg_output_plane + sg_stride + x + 1) = pix; + } + sg_output_plane += sg_stride * 2; + } + + } else if ((P[0] > P[1]) && (P[2] <= P[3])) { + + /* 1 of 4 colors for each 2x1 block, need 8 more bytes */ + CHECK_STREAM_PTR(8); + + for (y = 0; y < 8; y++) { + /* time to reload flags? */ + if ((y == 0) || (y == 4)) { + flags = 0; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + shifter = 30; + } + for (x = 0; x < 8; x += 2, shifter -= 2) { + pix = P[(flags >> shifter) & 0x03]; + *(sg_output_plane + x) = pix; + *(sg_output_plane + x + 1) = pix; + } + sg_output_plane += sg_stride; + } + + } else { + + /* 1 of 4 colors for each 1x2 block, need 8 more bytes */ + CHECK_STREAM_PTR(8); + + for (y = 0; y < 8; y += 2) { + /* time to reload flags? */ + if ((y == 0) || (y == 4)) { + flags = 0; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + flags = (flags << 8) | *sg_stream_ptr++; + shifter = 30; + } + for (x = 0; x < 8; x++, shifter -= 2) { + pix = P[(flags >> shifter) & 0x03]; + *(sg_output_plane + x) = pix; + *(sg_output_plane + sg_stride + x) = pix; + } + sg_output_plane += sg_stride * 2; + } + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xA(void) +{ + int x, y; + unsigned char P[16]; + unsigned char B[16]; + int flags = 0; + int shifter = 0; + int index; + int split; + int lower_half; + + /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on + * either top and bottom or left and right halves */ + CHECK_STREAM_PTR(4); + + for (y = 0; y < 4; y++) + P[y] = *sg_stream_ptr++; + + if (P[0] <= P[1]) { + + /* 4-color encoding for each quadrant; need 28 more bytes */ + CHECK_STREAM_PTR(28); + + for (y = 0; y < 4; y++) + B[y] = *sg_stream_ptr++; + for (y = 4; y < 16; y += 4) { + for (x = y; x < y + 4; x++) + P[x] = *sg_stream_ptr++; + for (x = y; x < y + 4; x++) + B[x] = *sg_stream_ptr++; + } + + for (y = 0; y < 8; y++) { + + lower_half = (y >= 4) ? 4 : 0; + flags = (B[y] << 8) | B[y + 8]; + + for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) { + split = (x >= 4) ? 8 : 0; + index = split + lower_half + ((flags >> shifter) & 0x03); + *sg_output_plane++ = P[index]; + } + + sg_output_plane += sg_line_inc; + } + + } else { + + /* 4-color encoding for either left and right or top and bottom + * halves; need 20 more bytes */ + CHECK_STREAM_PTR(20); + + for (y = 0; y < 8; y++) + B[y] = *sg_stream_ptr++; + for (y = 4; y < 8; y++) + P[y] = *sg_stream_ptr++; + for (y = 8; y < 16; y++) + B[y] = *sg_stream_ptr++; + + if (P[4] <= P[5]) { + + /* block is divided into left and right halves */ + for (y = 0; y < 8; y++) { + + flags = (B[y] << 8) | B[y + 8]; + split = 0; + + for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) { + if (x == 4) + split = 4; + *sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)]; + } + + sg_output_plane += sg_line_inc; + } + + } else { + + /* block is divided into top and bottom halves */ + split = 0; + for (y = 0; y < 8; y++) { + + flags = (B[y * 2] << 8) | B[y * 2 + 1]; + if (y == 4) + split = 4; + + for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) + *sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)]; + + sg_output_plane += sg_line_inc; + } + } + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xB(void) +{ + int x, y; + + /* 64-color encoding (each pixel in block is a different color) */ + CHECK_STREAM_PTR(64); + + for (y = 0; y < 8; y++) { + for (x = 0; x < 8; x++) { + *sg_output_plane++ = *sg_stream_ptr++; + } + sg_output_plane += sg_line_inc; + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xC(void) +{ + int x, y; + unsigned char pix; + + /* 16-color block encoding: each 2x2 block is a different color */ + CHECK_STREAM_PTR(16); + + for (y = 0; y < 8; y += 2) { + for (x = 0; x < 8; x += 2) { + pix = *sg_stream_ptr++; + *(sg_output_plane + x) = pix; + *(sg_output_plane + x + 1) = pix; + *(sg_output_plane + sg_stride + x) = pix; + *(sg_output_plane + sg_stride + x + 1) = pix; + } + sg_output_plane += sg_stride * 2; + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xD(void) +{ + int x, y; + unsigned char P[4]; + unsigned char index = 0; + + /* 4-color block encoding: each 4x4 block is a different color */ + CHECK_STREAM_PTR(4); + + for (y = 0; y < 4; y++) + P[y] = *sg_stream_ptr++; + + for (y = 0; y < 8; y++) { + if (y < 4) + index = 0; + else + index = 2; + + for (x = 0; x < 8; x++) { + if (x == 4) + index++; + *sg_output_plane++ = P[index]; + } + sg_output_plane += sg_line_inc; + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xE(void) +{ + int x, y; + unsigned char pix; + + /* 1-color encoding: the whole block is 1 solid color */ + CHECK_STREAM_PTR(1); + pix = *sg_stream_ptr++; + + for (y = 0; y < 8; y++) { + for (x = 0; x < 8; x++) { + *sg_output_plane++ = pix; + } + sg_output_plane += sg_line_inc; + } + + /* report success */ + return 0; +} + +static int ipvideo_decode_block_opcode_0xF(void) +{ + int x, y; + unsigned char sample0, sample1; + + /* dithered encoding */ + CHECK_STREAM_PTR(2); + sample0 = *sg_stream_ptr++; + sample1 = *sg_stream_ptr++; + + for (y = 0; y < 8; y++) { + for (x = 0; x < 8; x += 2) { + if (y & 1) { + *sg_output_plane++ = sample1; + *sg_output_plane++ = sample0; + } else { + *sg_output_plane++ = sample0; + *sg_output_plane++ = sample1; + } + } + sg_output_plane += sg_line_inc; + } + + /* report success */ + return 0; +} + +static int (*ipvideo_decode_block[16])(void); + +static void ipvideo_decode_opcodes(IpvideoContext *s) +{ + int x, y; + int index = 0; + unsigned char opcode; + int ret; + int code_counts[16]; + static int frame = 0; + + debug_interplay("------------------ frame %d\n", frame); + frame++; + + for (x = 0; x < 16; x++) + code_counts[x] = 0; + + /* this is PAL8, so make the palette available */ + if (s->avctx->pix_fmt == PIX_FMT_PAL8) + memcpy(s->current_frame.data[1], s->palette, PALETTE_COUNT * 4); + + switch (s->avctx->pix_fmt) { + + case PIX_FMT_PAL8: + sg_stride = s->current_frame.linesize[0]; + sg_stream_ptr = s->buf + 14; /* data starts 14 bytes in */ + sg_stream_end = s->buf + s->size; + sg_line_inc = sg_stride - 8; + sg_current_plane = s->current_frame.data[0]; + sg_last_plane = s->last_frame.data[0]; + sg_upper_motion_limit_offset = (s->avctx->height - 8) * sg_stride + + s->avctx->width - 8; + sg_dsp = s->dsp; + + for (y = 0; y < (sg_stride * s->avctx->height); y += sg_stride * 8) { + for (x = y; x < y + s->avctx->width; x += 8) { + /* bottom nibble first, then top nibble (which makes it + * hard to use a GetBitcontext) */ + if (index & 1) + opcode = s->decoding_map[index >> 1] >> 4; + else + opcode = s->decoding_map[index >> 1] & 0xF; + index++; + + debug_interplay(" block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n", + x - y, y / sg_stride, opcode, sg_stream_ptr); + code_counts[opcode]++; + + sg_output_plane = sg_current_plane + x; + ret = ipvideo_decode_block[opcode](); + if (ret != 0) { + printf(" Interplay video: decode problem on frame %d, @ block (%d, %d)\n", + frame, x - y, y / sg_stride); + return; + } + } + } + if ((sg_stream_ptr != sg_stream_end) && + (sg_stream_ptr + 1 != sg_stream_end)) { + printf (" Interplay video: decode finished with %d bytes left over\n", + sg_stream_end - sg_stream_ptr); + } + break; + + default: + printf ("Interplay video: Unhandled video format\n"); + break; + } + +} + static int ipvideo_decode_init(AVCodecContext *avctx) { IpvideoContext *s = avctx->priv_data; s->avctx = avctx; - avctx->pix_fmt = PIX_FMT_YUV444P; + + if (s->avctx->extradata_size != sizeof(AVPaletteControl)) { + printf (" Interplay video: expected extradata_size of %d\n", + sizeof(AVPaletteControl)); + return -1; + } + + avctx->pix_fmt = PIX_FMT_PAL8; avctx->has_b_frames = 0; dsputil_init(&s->dsp, avctx); s->first_frame = 1; - s->receiving_decoding_map = 1; /* decoding map will be received first */ /* decoding map contains 4 bits of information per 8x8 block */ s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2); - s->decoding_map = av_malloc(s->decoding_map_size); + + /* assign block decode functions */ + ipvideo_decode_block[0x0] = ipvideo_decode_block_opcode_0x0_0x1; + ipvideo_decode_block[0x1] = ipvideo_decode_block_opcode_0x0_0x1; + ipvideo_decode_block[0x2] = ipvideo_decode_block_opcode_0x2; + ipvideo_decode_block[0x3] = ipvideo_decode_block_opcode_0x3; + ipvideo_decode_block[0x4] = ipvideo_decode_block_opcode_0x4; + ipvideo_decode_block[0x5] = ipvideo_decode_block_opcode_0x5; + ipvideo_decode_block[0x6] = ipvideo_decode_block_opcode_0x6; + ipvideo_decode_block[0x7] = ipvideo_decode_block_opcode_0x7; + ipvideo_decode_block[0x8] = ipvideo_decode_block_opcode_0x8; + ipvideo_decode_block[0x9] = ipvideo_decode_block_opcode_0x9; + ipvideo_decode_block[0xA] = ipvideo_decode_block_opcode_0xA; + ipvideo_decode_block[0xB] = ipvideo_decode_block_opcode_0xB; + ipvideo_decode_block[0xC] = ipvideo_decode_block_opcode_0xC; + ipvideo_decode_block[0xD] = ipvideo_decode_block_opcode_0xD; + ipvideo_decode_block[0xE] = ipvideo_decode_block_opcode_0xE; + ipvideo_decode_block[0xF] = ipvideo_decode_block_opcode_0xF; return 0; } @@ -74,49 +919,38 @@ static int ipvideo_decode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size) { IpvideoContext *s = avctx->priv_data; + AVPaletteControl *palette_control = (AVPaletteControl *)avctx->extradata; - if (s->receiving_decoding_map) { - /* receiving the decoding map on this iteration */ - s->receiving_decoding_map = 0; - - if (buf_size != s->decoding_map_size) - printf (" Interplay video: buf_size != decoding_map_size (%d != %d)\n", - buf_size, s->decoding_map_size); - else - memcpy(s->decoding_map, buf, buf_size); + if (palette_control->palette_changed) { + /* load the new palette and reset the palette control */ + ipvideo_new_palette(s, palette_control->palette); + palette_control->palette_changed = 0; + } - *data_size = 0; - *(AVFrame*)data = s->last_frame; - } else { - /* receiving the compressed video data on this iteration */ - s->receiving_decoding_map = 1; - s->buf = buf; - s->size = buf_size; + s->decoding_map = buf; + s->buf = buf + s->decoding_map_size; + s->size = buf_size - s->decoding_map_size; - if (avctx->get_buffer(avctx, &s->current_frame)) { - printf (" Interplay Video: get_buffer() failed\n"); - return -1; - } + if (avctx->get_buffer(avctx, &s->current_frame)) { + printf (" Interplay Video: get_buffer() failed\n"); + return -1; + } -// ipvideo_decode_frame(s); -memset(s->current_frame.data[0], 0x80, s->current_frame.linesize[0] * avctx->height); -memset(s->current_frame.data[1], 0x80, s->current_frame.linesize[1] * avctx->height / 4); -memset(s->current_frame.data[2], 0x80, s->current_frame.linesize[2] * avctx->height / 4); + ipvideo_decode_opcodes(s); - /* release the last frame if it is allocated */ - if (s->first_frame) - s->first_frame = 0; - else - avctx->release_buffer(avctx, &s->last_frame); + /* release the last frame if it is allocated */ + if (s->first_frame) + s->first_frame = 0; + else + avctx->release_buffer(avctx, &s->last_frame); - /* shuffle frames */ - s->last_frame = s->current_frame; + /* shuffle frames */ + s->last_frame = s->current_frame; - *data_size = sizeof(AVFrame); - *(AVFrame*)data = s->current_frame; - } + *data_size = sizeof(AVFrame); + *(AVFrame*)data = s->current_frame; - /* always report that the buffer was completely consumed */ + /* report that the buffer was completely consumed */ return buf_size; } @@ -127,8 +961,6 @@ static int ipvideo_decode_end(AVCodecContext *avctx) /* release the last frame */ avctx->release_buffer(avctx, &s->last_frame); - av_free(s->decoding_map); - return 0; } |