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lavc/cfhd: interlaced frame decoding added
ticket #5522 output of given samples significantly improved
This commit is contained in:
Gagandeep Singh
Kieran Kunhya
parent
63c4a4b0d6
commit
9cefb9e7ec
@ -49,12 +49,15 @@ enum CFHDParam {
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SubbandNumber = 48,
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Quantization = 53,
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ChannelNumber = 62,
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SampleFlags = 68,
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BitsPerComponent = 101,
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ChannelWidth = 104,
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ChannelHeight = 105,
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PrescaleShift = 109,
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};
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static av_cold int cfhd_init(AVCodecContext *avctx)
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{
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CFHDContext *s = avctx->priv_data;
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@ -72,6 +75,13 @@ static void init_plane_defaults(CFHDContext *s)
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s->subband_num_actual = 0;
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}
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static void init_peak_table_defaults(CFHDContext *s)
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{
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s->peak.level = 0;
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s->peak.offset = 0;
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s->peak.base = NULL;
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}
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static void init_frame_defaults(CFHDContext *s)
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{
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s->coded_width = 0;
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@ -86,15 +96,44 @@ static void init_frame_defaults(CFHDContext *s)
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s->wavelet_depth = 3;
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s->pshift = 1;
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s->codebook = 0;
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s->difference_coding = 0;
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s->progressive = 0;
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init_plane_defaults(s);
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init_peak_table_defaults(s);
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}
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/* TODO: merge with VLC tables or use LUT */
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static inline int dequant_and_decompand(int level, int quantisation)
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static inline int dequant_and_decompand(int level, int quantisation, int codebook)
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{
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int64_t abslevel = abs(level);
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return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
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FFSIGN(level) * quantisation;
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if (codebook == 0 || codebook == 1) {
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int64_t abslevel = abs(level);
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if (level < 264)
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return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
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FFSIGN(level) * quantisation;
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else
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return level * quantisation;
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} else
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return level * quantisation;
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}
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static inline void difference_coding(int16_t *band, int width, int height)
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{
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int i,j;
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for (i = 0; i < height; i++) {
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for (j = 1; j < width; j++) {
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band[j] += band[j-1];
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}
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band += width;
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}
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}
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static inline void peak_table(int16_t *band, Peak *peak, int length)
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{
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int i;
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for (i = 0; i < length; i++)
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if (abs(band[i]) > peak->level)
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band[i] = *(peak->base++);
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}
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static inline void process_alpha(int16_t *alpha, int width)
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@ -154,6 +193,18 @@ static inline void filter(int16_t *output, ptrdiff_t out_stride,
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}
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}
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static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
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int width, int linesize, int plane)
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{
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int i;
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int16_t even, odd;
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for (i = 0; i < width; i++) {
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even = (low[i] - high[i])/2;
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odd = (low[i] + high[i])/2;
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output[i] = av_clip_uintp2(even, 10);
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output[i + linesize] = av_clip_uintp2(odd, 10);
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}
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}
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static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
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int width)
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{
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@ -295,6 +346,9 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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uint16_t data = bytestream2_get_be16(&gb);
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if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
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av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
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} else if (tag == SampleFlags) {
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av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
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s->progressive = data & 0x0001;
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} else if (tag == ImageWidth) {
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av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
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s->coded_width = data;
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@ -393,6 +447,8 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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}
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av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
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} else if (abstag >= 0x4000 && abstag <= 0x40ff) {
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if (abstag == 0x4001)
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s->peak.level = 0;
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av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
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bytestream2_skipu(&gb, data * 4);
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} else if (tag == 23) {
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@ -450,7 +506,8 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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s->codebook = data;
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av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
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} else if (tag == 72) {
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s->codebook = data;
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s->codebook = data & 0xf;
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s->difference_coding = (data >> 4) & 1;
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av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
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} else if (tag == 70) {
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av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
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@ -477,6 +534,19 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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} else if (tag == -85) {
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av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
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s->cropped_height = data;
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} else if (tag == -75) {
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s->peak.offset &= ~0xffff;
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s->peak.offset |= (data & 0xffff);
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s->peak.base = (int16_t *) gb.buffer;
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s->peak.level = 0;
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} else if (tag == -76) {
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s->peak.offset &= 0xffff;
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s->peak.offset |= (data & 0xffff)<<16;
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s->peak.base = (int16_t *) gb.buffer;
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s->peak.level = 0;
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} else if (tag == -74 && s->peak.offset) {
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s->peak.level = data;
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s->peak.base += s->peak.offset / 2 - 2;
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} else
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av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data);
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@ -594,10 +664,15 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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if (count > expected)
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break;
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coeff = dequant_and_decompand(level, s->quantisation);
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coeff = dequant_and_decompand(level, s->quantisation, 0);
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for (i = 0; i < run; i++)
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*coeff_data++ = coeff;
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}
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if (s->peak.level)
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peak_table(coeff_data - expected, &s->peak, expected);
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if (s->difference_coding)
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difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
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} else {
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while (1) {
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UPDATE_CACHE(re, &s->gb);
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@ -613,10 +688,15 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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if (count > expected)
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break;
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coeff = dequant_and_decompand(level, s->quantisation);
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coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
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for (i = 0; i < run; i++)
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*coeff_data++ = coeff;
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}
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if (s->peak.level)
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peak_table(coeff_data - expected, &s->peak, expected);
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if (s->difference_coding)
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difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
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}
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CLOSE_READER(re, &s->gb);
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}
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@ -784,37 +864,68 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
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}
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av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
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if (s->progressive) {
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low = s->plane[plane].subband[0];
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high = s->plane[plane].subband[8];
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output = s->plane[plane].l_h[6];
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for (i = 0; i < lowpass_width; i++) {
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vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
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low++;
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high++;
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output++;
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}
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low = s->plane[plane].subband[0];
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high = s->plane[plane].subband[8];
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output = s->plane[plane].l_h[6];
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for (i = 0; i < lowpass_width; i++) {
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vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
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low++;
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high++;
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output++;
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}
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low = s->plane[plane].subband[7];
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high = s->plane[plane].subband[9];
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output = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_width; i++) {
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vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
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low++;
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high++;
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output++;
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}
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low = s->plane[plane].subband[7];
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high = s->plane[plane].subband[9];
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output = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_width; i++) {
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vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
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low++;
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high++;
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output++;
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}
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dst = (int16_t *)pic->data[act_plane];
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low = s->plane[plane].l_h[6];
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high = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_height * 2; i++) {
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horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
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low += lowpass_width;
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high += lowpass_width;
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dst += pic->linesize[act_plane] / 2;
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}
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} else {
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av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
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pic->interlaced_frame = 1;
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low = s->plane[plane].subband[0];
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high = s->plane[plane].subband[7];
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output = s->plane[plane].l_h[6];
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for (i = 0; i < lowpass_height; i++) {
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horiz_filter(output, low, high, lowpass_width);
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low += lowpass_width;
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high += lowpass_width;
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output += lowpass_width * 2;
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}
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dst = (int16_t *)pic->data[act_plane];
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low = s->plane[plane].l_h[6];
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high = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_height * 2; i++) {
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horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
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if (act_plane == 3)
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process_alpha(dst, lowpass_width * 2);
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low += lowpass_width;
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high += lowpass_width;
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dst += pic->linesize[act_plane] / 2;
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low = s->plane[plane].subband[8];
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high = s->plane[plane].subband[9];
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output = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_height; i++) {
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horiz_filter(output, low, high, lowpass_width);
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low += lowpass_width;
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high += lowpass_width;
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output += lowpass_width * 2;
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}
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dst = (int16_t *)pic->data[act_plane];
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low = s->plane[plane].l_h[6];
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high = s->plane[plane].l_h[7];
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for (i = 0; i < lowpass_height; i++) {
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interlaced_vertical_filter(dst, low, high, lowpass_width * 2, pic->linesize[act_plane]/2, act_plane);
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low += lowpass_width * 2;
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high += lowpass_width * 2;
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dst += pic->linesize[act_plane];
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}
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}
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}
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@ -68,6 +68,12 @@ typedef struct Plane {
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SubBand band[DWT_LEVELS][4];
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} Plane;
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typedef struct Peak {
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int level;
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int offset;
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const int16_t *base;
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} Peak;
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typedef struct CFHDContext {
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AVCodecContext *avctx;
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@ -83,6 +89,7 @@ typedef struct CFHDContext {
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int coded_height;
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int cropped_height;
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enum AVPixelFormat coded_format;
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int progressive;
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int a_width;
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int a_height;
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@ -98,12 +105,14 @@ typedef struct CFHDContext {
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int pshift;
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int codebook;
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int difference_coding;
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int subband_num;
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int level;
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int subband_num_actual;
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uint8_t prescale_shift[3];
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Plane plane[4];
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Peak peak;
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} CFHDContext;
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int ff_cfhd_init_vlcs(CFHDContext *s);
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