* Indeo Video Interactive v5 compatible decoder
* Copyright (c) 2009 Maxim Poliakovski
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/indeo5.c
+ * @file
* Indeo Video Interactive version 5 decoder
*
* Indeo5 data is usually transported within .avi or .mov files.
IVIPlaneDesc planes[3]; ///< color planes
const uint8_t *frame_data; ///< input frame data pointer
int buf_switch; ///< used to switch between three buffers
- int dst_buf;
- int ref_buf;
+ int inter_scal; ///< signals a sequence of scalable inter frames
+ int dst_buf; ///< buffer index for the currently decoded frame
+ int ref_buf; ///< inter frame reference buffer index
+ int ref2_buf; ///< temporal storage for switching buffers
uint32_t frame_size; ///< frame size in bytes
int frame_type;
int prev_frame_type; ///< frame type of the previous frame
/**
- * Decodes Indeo5 GOP (Group of pictures) header.
+ * Decode Indeo5 GOP (Group of pictures) header.
* This header is present in key frames only.
* It defines parameters for all frames in a GOP.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
+ * @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
{
- int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, blk_size_changed = 0;
+ int result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
+ int quant_mat, blk_size_changed = 0;
IVIBandDesc *band, *band1, *band2;
IVIPicConfig pic_conf;
case 1:
band->inv_transform = ff_ivi_row_slant8;
band->dc_transform = ff_ivi_dc_row_slant;
- band->scan = ivi5_scans8x8[0];
+ band->scan = ff_ivi_vertical_scan_8x8;
break;
case 2:
band->inv_transform = ff_ivi_col_slant8;
band->dc_transform = ff_ivi_dc_col_slant;
- band->scan = ivi5_scans8x8[1];
+ band->scan = ff_ivi_horizontal_scan_8x8;
break;
case 3:
band->inv_transform = ff_ivi_put_pixels_8x8;
band->dc_transform = ff_ivi_put_dc_pixel_8x8;
- band->scan = ivi5_scans8x8[1];
+ band->scan = ff_ivi_horizontal_scan_8x8;
break;
case 4:
band->inv_transform = ff_ivi_inverse_slant_4x4;
band->dc_transform = ff_ivi_dc_slant_2d;
- band->scan = ivi5_scan4x4;
+ band->scan = ff_ivi_direct_scan_4x4;
break;
}
/* select dequant matrix according to plane and band number */
if (!p) {
- band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
+ quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
} else {
- band->quant_mat = 5;
+ quant_mat = 5;
+ }
+
+ if (band->blk_size == 8) {
+ band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
+ band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
+ band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
+ band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
+ } else {
+ band->intra_base = ivi5_base_quant_4x4_intra;
+ band->inter_base = ivi5_base_quant_4x4_inter;
+ band->intra_scale = ivi5_scale_quant_4x4_intra;
+ band->inter_scale = ivi5_scale_quant_4x4_inter;
}
if (get_bits(&ctx->gb, 2)) {
band2->mb_size = band1->mb_size;
band2->blk_size = band1->blk_size;
band2->is_halfpel = band1->is_halfpel;
- band2->quant_mat = band1->quant_mat;
+ band2->intra_base = band1->intra_base;
+ band2->inter_base = band1->inter_base;
+ band2->intra_scale = band1->intra_scale;
+ band2->inter_scale = band1->inter_scale;
band2->scan = band1->scan;
band2->inv_transform = band1->inv_transform;
band2->dc_transform = band1->dc_transform;
/**
- * Skips a header extension.
+ * Skip a header extension.
*
- * @param gb [in,out] the GetBit context
+ * @param[in,out] gb the GetBit context
*/
static inline void skip_hdr_extension(GetBitContext *gb)
{
/**
- * Decodes Indeo5 picture header.
+ * Decode Indeo5 picture header.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
+ * @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
/**
- * Decodes Indeo5 band header.
+ * Decode Indeo5 band header.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param band [in,out] ptr to the band descriptor
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
+ * @param[in,out] band ptr to the band descriptor
+ * @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
/**
- * Decodes info (block type, cbp, quant delta, motion vector)
+ * Decode info (block type, cbp, quant delta, motion vector)
* for all macroblocks in the current tile.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param band [in,out] ptr to the band descriptor
- * @param tile [in,out] ptr to the tile descriptor
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
+ * @param[in,out] band ptr to the band descriptor
+ * @param[in,out] tile ptr to the tile descriptor
+ * @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
/**
- * Decodes an Indeo5 band.
+ * Decode an Indeo5 band.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param band [in,out] ptr to the band descriptor
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
+ * @param[in,out] band ptr to the band descriptor
+ * @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_band(IVI5DecContext *ctx, int plane_num,
IVIBandDesc *band, AVCodecContext *avctx)
{
- int result, i, t, idx1, idx2;
+ int result, i, t, idx1, idx2, pos;
IVITile *tile;
band->buf = band->bufs[ctx->dst_buf];
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
}
+ pos = get_bits_count(&ctx->gb);
+
for (t = 0; t < band->num_tiles; t++) {
tile = &band->tiles[t];
if (tile->is_empty) {
ff_ivi_process_empty_tile(avctx, band, tile,
(ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
- align_get_bits(&ctx->gb);
} else {
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
if (result < 0)
break;
- if (band->blk_size == 8) {
- band->intra_base = &ivi5_base_quant_8x8_intra[band->quant_mat][0];
- band->inter_base = &ivi5_base_quant_8x8_inter[band->quant_mat][0];
- band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0];
- band->inter_scale = &ivi5_scale_quant_8x8_inter[band->quant_mat][0];
- } else {
- band->intra_base = ivi5_base_quant_4x4_intra;
- band->inter_base = ivi5_base_quant_4x4_inter;
- band->intra_scale = ivi5_scale_quant_4x4_intra;
- band->inter_scale = ivi5_scale_quant_4x4_inter;
- }
-
result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
- if (result < 0) {
- av_log(avctx, AV_LOG_ERROR, "Corrupted blocks data encountered!\n");
+ if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
+ av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
break;
}
+ pos += tile->data_size << 3; // skip to next tile
}
}
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
}
-#if IVI_DEBUG
+#ifdef DEBUG
if (band->checksum_present) {
uint16_t chksum = ivi_calc_band_checksum(band);
if (chksum != band->checksum) {
}
#endif
+ align_get_bits(&ctx->gb);
+
return result;
}
/**
- * Switches buffers.
+ * Switch buffers.
*
- * @param ctx [in,out] ptr to the decoder context
- * @param avctx [in] ptr to the AVCodecContext
+ * @param[in,out] ctx ptr to the decoder context
*/
-static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx)
+static void switch_buffers(IVI5DecContext *ctx)
{
- switch (ctx->frame_type) {
+ switch (ctx->prev_frame_type) {
case FRAMETYPE_INTRA:
- ctx->buf_switch = 0;
- ctx->dst_buf = 0;
- ctx->ref_buf = 0;
- break;
case FRAMETYPE_INTER:
- ctx->buf_switch &= 1;
- /* swap buffers only if there were no droppable frames */
- if (ctx->prev_frame_type != FRAMETYPE_INTER_NOREF &&
- ctx->prev_frame_type != FRAMETYPE_INTER_SCAL)
- ctx->buf_switch ^= 1;
+ ctx->buf_switch ^= 1;
ctx->dst_buf = ctx->buf_switch;
ctx->ref_buf = ctx->buf_switch ^ 1;
break;
case FRAMETYPE_INTER_SCAL:
- if (ctx->prev_frame_type == FRAMETYPE_INTER_NOREF)
- break;
- if (ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) {
- ctx->buf_switch ^= 1;
- ctx->dst_buf = ctx->buf_switch;
- ctx->ref_buf = ctx->buf_switch ^ 1;
- } else {
- ctx->buf_switch ^= 2;
- ctx->dst_buf = 2;
- ctx->ref_buf = ctx->buf_switch & 1;
- if (!(ctx->buf_switch & 2))
- FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
+ if (!ctx->inter_scal) {
+ ctx->ref2_buf = 2;
+ ctx->inter_scal = 1;
}
+ FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
+ ctx->ref_buf = ctx->ref2_buf;
break;
case FRAMETYPE_INTER_NOREF:
- if (ctx->prev_frame_type == FRAMETYPE_INTER_SCAL) {
- ctx->buf_switch ^= 2;
- ctx->dst_buf = 2;
- ctx->ref_buf = ctx->buf_switch & 1;
- if (!(ctx->buf_switch & 2))
- FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
- } else {
- ctx->buf_switch ^= 1;
- ctx->dst_buf = ctx->buf_switch & 1;
- ctx->ref_buf = (ctx->buf_switch & 1) ^ 1;
- }
break;
+ }
+
+ switch (ctx->frame_type) {
+ case FRAMETYPE_INTRA:
+ ctx->buf_switch = 0;
+ /* FALLTHROUGH */
+ case FRAMETYPE_INTER:
+ ctx->inter_scal = 0;
+ ctx->dst_buf = ctx->buf_switch;
+ ctx->ref_buf = ctx->buf_switch ^ 1;
+ break;
+ case FRAMETYPE_INTER_SCAL:
+ case FRAMETYPE_INTER_NOREF:
case FRAMETYPE_NULL:
- return;
- default:
- av_log(avctx, AV_LOG_ERROR, "unsupported frame type: %d\n", ctx->frame_type);
+ break;
}
}
/**
- * Initializes Indeo5 decoder.
+ * Initialize Indeo5 decoder.
*/
static av_cold int decode_init(AVCodecContext *avctx)
{
return -1;
}
+ ctx->buf_switch = 0;
+ ctx->inter_scal = 0;
+
avctx->pix_fmt = PIX_FMT_YUV410P;
return 0;
return -1;
}
- switch_buffers(ctx, avctx);
+ switch_buffers(ctx);
//START_TIMER;
- if (ctx->frame_type == FRAMETYPE_NULL) {
- ctx->frame_type = ctx->prev_frame_type;
- } else {
+ if (ctx->frame_type != FRAMETYPE_NULL) {
for (p = 0; p < 3; p++) {
for (b = 0; b < ctx->planes[p].num_bands; b++) {
result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
/**
- * Closes Indeo5 decoder and cleans up its context.
+ * Close Indeo5 decoder and clean up its context.
*/
static av_cold int decode_close(AVCodecContext *avctx)
{
}
-AVCodec indeo5_decoder = {
+AVCodec ff_indeo5_decoder = {
.name = "indeo5",
- .type = CODEC_TYPE_VIDEO,
+ .type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_INDEO5,
.priv_data_size = sizeof(IVI5DecContext),
.init = decode_init,
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