diff options
author | Paul B Mahol <onemda@gmail.com> | 2012-02-25 21:16:41 +0400 |
---|---|---|
committer | Justin Ruggles <justin.ruggles@gmail.com> | 2012-02-26 09:04:32 +0400 |
commit | 42459c6abb8e9149836ad56853952f4468d75369 (patch) | |
tree | 25658fad1a261436d756463e8493de05023d3b6d | |
parent | cf6914e27f14cf2b5a66e25f5cf3549ceabb1648 (diff) |
cdxl: bit line plane arrangement support
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
-rw-r--r-- | libavcodec/cdxl.c | 59 |
1 files changed, 48 insertions, 11 deletions
diff --git a/libavcodec/cdxl.c b/libavcodec/cdxl.c index cbb9976f67..7726ebfe2f 100644 --- a/libavcodec/cdxl.c +++ b/libavcodec/cdxl.c @@ -24,10 +24,18 @@ #include "avcodec.h" #include "get_bits.h" +#define BIT_PLANAR 0x00 +#define BYTE_PLANAR 0x20 +#define CHUNKY 0x40 +#define BIT_LINE 0x80 +#define BYTE_LINE 0xC0 + typedef struct { AVCodecContext *avctx; AVFrame frame; int bpp; + int format; + int padded_bits; const uint8_t *palette; int palette_size; const uint8_t *video; @@ -62,27 +70,54 @@ static void import_palette(CDXLVideoContext *c, uint32_t *new_palette) static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out) { - int skip = FFALIGN(c->avctx->width, 16) - c->avctx->width; GetBitContext gb; int x, y, plane; init_get_bits(&gb, c->video, c->video_size * 8); - memset(out, 0, linesize * c->avctx->height); for (plane = 0; plane < c->bpp; plane++) { for (y = 0; y < c->avctx->height; y++) { for (x = 0; x < c->avctx->width; x++) out[linesize * y + x] |= get_bits1(&gb) << plane; - skip_bits(&gb, skip); + skip_bits(&gb, c->padded_bits); + } + } +} + +static void bitline2chunky(CDXLVideoContext *c, int linesize, uint8_t *out) +{ + GetBitContext gb; + int x, y, plane; + + init_get_bits(&gb, c->video, c->video_size * 8); + for (y = 0; y < c->avctx->height; y++) { + for (plane = 0; plane < c->bpp; plane++) { + for (x = 0; x < c->avctx->width; x++) + out[linesize * y + x] |= get_bits1(&gb) << plane; + skip_bits(&gb, c->padded_bits); } } } +static void import_format(CDXLVideoContext *c, int linesize, uint8_t *out) +{ + memset(out, 0, linesize * c->avctx->height); + + switch (c->format) { + case BIT_PLANAR: + bitplanar2chunky(c, linesize, out); + break; + case BIT_LINE: + bitline2chunky(c, linesize, out); + break; + } +} + static void cdxl_decode_rgb(CDXLVideoContext *c) { uint32_t *new_palette = (uint32_t *)c->frame.data[1]; import_palette(c, new_palette); - bitplanar2chunky(c, c->frame.linesize[0], c->frame.data[0]); + import_format(c, c->frame.linesize[0], c->frame.data[0]); } static void cdxl_decode_ham6(CDXLVideoContext *c) @@ -96,7 +131,7 @@ static void cdxl_decode_ham6(CDXLVideoContext *c) out = c->frame.data[0]; import_palette(c, new_palette); - bitplanar2chunky(c, avctx->width, c->new_video); + import_format(c, avctx->width, c->new_video); for (y = 0; y < avctx->height; y++) { r = new_palette[0] & 0xFF0000; @@ -139,7 +174,7 @@ static void cdxl_decode_ham8(CDXLVideoContext *c) out = c->frame.data[0]; import_palette(c, new_palette); - bitplanar2chunky(c, avctx->width, c->new_video); + import_format(c, avctx->width, c->new_video); for (y = 0; y < avctx->height; y++) { r = new_palette[0] & 0xFF0000; @@ -176,13 +211,13 @@ static int cdxl_decode_frame(AVCodecContext *avctx, void *data, { CDXLVideoContext *c = avctx->priv_data; AVFrame * const p = &c->frame; - int ret, w, h, encoding, format, buf_size = pkt->size; + int ret, w, h, encoding, aligned_width, buf_size = pkt->size; const uint8_t *buf = pkt->data; if (buf_size < 32) return AVERROR_INVALIDDATA; encoding = buf[1] & 7; - format = buf[1] & 0xE0; + c->format = buf[1] & 0xE0; w = AV_RB16(&buf[14]); h = AV_RB16(&buf[16]); c->bpp = buf[19]; @@ -197,8 +232,8 @@ static int cdxl_decode_frame(AVCodecContext *avctx, void *data, return AVERROR_INVALIDDATA; if (c->bpp < 1) return AVERROR_INVALIDDATA; - if (format) { - av_log_ask_for_sample(avctx, "unsupported pixel format: %d\n", format); + if (c->format != BIT_PLANAR && c->format != BIT_LINE) { + av_log_ask_for_sample(avctx, "unsupported pixel format: 0x%0x\n", c->format); return AVERROR_PATCHWELCOME; } @@ -207,7 +242,9 @@ static int cdxl_decode_frame(AVCodecContext *avctx, void *data, if (w != avctx->width || h != avctx->height) avcodec_set_dimensions(avctx, w, h); - if (c->video_size < FFALIGN(avctx->width, 16) * avctx->height * c->bpp / 8) + aligned_width = FFALIGN(c->avctx->width, 16); + c->padded_bits = aligned_width - c->avctx->width; + if (c->video_size < aligned_width * avctx->height * c->bpp / 8) return AVERROR_INVALIDDATA; if (!encoding && c->palette_size && c->bpp <= 8) { avctx->pix_fmt = PIX_FMT_PAL8; |