factor out common decoding code for Indeo 4 and Indeo 5

1 files changed, 21 insertions, 220 deletions

diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c
index deb76b9795..d903cb2773 100644
--- a/libavcodec/indeo5.c
+++ b/libavcodec/indeo5.c
@@ -48,37 +48,6 @@ enum {
 
 #define IVI5_PIC_SIZE_ESC       15
 
-#define IVI5_IS_PROTECTED       0x20
-
-typedef struct {
-    GetBitContext   gb;
-    AVFrame         frame;
-    RVMapDesc       rvmap_tabs[9];   ///< local corrected copy of the static rvmap tables
-    IVIPlaneDesc    planes[3];       ///< color planes
-    const uint8_t   *frame_data;     ///< input frame data pointer
-    int             buf_switch;      ///< used to switch between three buffers
-    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
-    int             frame_num;
-    uint32_t        pic_hdr_size;    ///< picture header size in bytes
-    uint8_t         frame_flags;
-    uint16_t        checksum;        ///< frame checksum
-
-    IVIHuffTab      mb_vlc;          ///< vlc table for decoding macroblock data
-
-    uint16_t        gop_hdr_size;
-    uint8_t         gop_flags;
-    int             is_scalable;
-    uint32_t        lock_word;
-    IVIPicConfig    pic_conf;
-} IVI5DecContext;
-
-
 /**
  *  Decode Indeo5 GOP (Group of pictures) header.
  *  This header is present in key frames only.
@@ -88,7 +57,7 @@ typedef struct {
  *  @param[in]     avctx  ptr to the AVCodecContext
  *  @return         result code: 0 = OK, -1 = error
  */
-static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
+static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
 {
     int             result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
     int             quant_mat, blk_size_changed = 0;
@@ -318,7 +287,7 @@ static inline void skip_hdr_extension(GetBitContext *gb)
  *  @param[in]      avctx  ptr to the AVCodecContext
  *  @return         result code: 0 = OK, -1 = error
  */
-static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
+static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
 {
     if (get_bits(&ctx->gb, 5) != 0x1F) {
         av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
@@ -371,7 +340,7 @@ static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
  *  @param[in]      avctx  ptr to the AVCodecContext
  *  @return         result code: 0 = OK, -1 = error
  */
-static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
+static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
                            AVCodecContext *avctx)
 {
     int         i;
@@ -441,7 +410,7 @@ static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
  *  @param[in]      avctx  ptr to the AVCodecContext
  *  @return         result code: 0 = OK, -1 = error
  */
-static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
+static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
                           IVITile *tile, AVCodecContext *avctx)
 {
     int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
@@ -561,101 +530,11 @@ static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
 
 
 /**
- *  Decode an Indeo5 band.
- *
- *  @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, pos;
-    IVITile     *tile;
-
-    band->buf     = band->bufs[ctx->dst_buf];
-    band->ref_buf = band->bufs[ctx->ref_buf];
-    band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
-
-    result = decode_band_hdr(ctx, band, avctx);
-    if (result) {
-        av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
-               result);
-        return -1;
-    }
-
-    if (band->is_empty) {
-        av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
-        return -1;
-    }
-
-    band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
-
-    /* apply corrections to the selected rvmap table if present */
-    for (i = 0; i < band->num_corr; i++) {
-        idx1 = band->corr[i*2];
-        idx2 = band->corr[i*2+1];
-        FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
-        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];
-
-        tile->is_empty = get_bits1(&ctx->gb);
-        if (tile->is_empty) {
-            ff_ivi_process_empty_tile(avctx, band, tile,
-                                      (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
-        } else {
-            tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
-
-            result = decode_mb_info(ctx, band, tile, avctx);
-            if (result < 0)
-                break;
-
-            result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
-            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
-        }
-    }
-
-    /* restore the selected rvmap table by applying its corrections in reverse order */
-    for (i = band->num_corr-1; i >= 0; i--) {
-        idx1 = band->corr[i*2];
-        idx2 = band->corr[i*2+1];
-        FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
-        FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
-    }
-
-#ifdef DEBUG
-    if (band->checksum_present) {
-        uint16_t chksum = ivi_calc_band_checksum(band);
-        if (chksum != band->checksum) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
-                   band->plane, band->band_num, band->checksum, chksum);
-        }
-    }
-#endif
-
-    align_get_bits(&ctx->gb);
-
-    return result;
-}
-
-
-/**
  *  Switch buffers.
  *
  *  @param[in,out] ctx  ptr to the decoder context
  */
-static void switch_buffers(IVI5DecContext *ctx)
+static void switch_buffers(IVI45DecContext *ctx)
 {
     switch (ctx->prev_frame_type) {
     case FRAMETYPE_INTRA:
@@ -693,12 +572,18 @@ static void switch_buffers(IVI5DecContext *ctx)
 }
 
 
+static int is_nonnull_frame(IVI45DecContext *ctx)
+{
+    return ctx->frame_type != FRAMETYPE_NULL;
+}
+
+
 /**
  *  Initialize Indeo5 decoder.
  */
 static av_cold int decode_init(AVCodecContext *avctx)
 {
-    IVI5DecContext  *ctx = avctx->priv_data;
+    IVI45DecContext  *ctx = avctx->priv_data;
     int             result;
 
     ff_ivi_init_static_vlc();
@@ -726,97 +611,13 @@ static av_cold int decode_init(AVCodecContext *avctx)
     ctx->buf_switch = 0;
     ctx->inter_scal = 0;
 
-    avctx->pix_fmt = PIX_FMT_YUV410P;
-
-    return 0;
-}
-
-
-/**
- *  main decoder function
- */
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
-                        AVPacket *avpkt)
-{
-    IVI5DecContext  *ctx = avctx->priv_data;
-    const uint8_t   *buf = avpkt->data;
-    int             buf_size = avpkt->size;
-    int             result, p, b;
-
-    init_get_bits(&ctx->gb, buf, buf_size * 8);
-    ctx->frame_data = buf;
-    ctx->frame_size = buf_size;
-
-    result = decode_pic_hdr(ctx, avctx);
-    if (result) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Error while decoding picture header: %d\n", result);
-        return -1;
-    }
-
-    if (ctx->gop_flags & IVI5_IS_PROTECTED) {
-        av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
-        return -1;
-    }
+    ctx->decode_pic_hdr   = decode_pic_hdr;
+    ctx->decode_band_hdr  = decode_band_hdr;
+    ctx->decode_mb_info   = decode_mb_info;
+    ctx->switch_buffers   = switch_buffers;
+    ctx->is_nonnull_frame = is_nonnull_frame;
 
-    switch_buffers(ctx);
-
-    //{ START_TIMER;
-
-    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);
-                if (result) {
-                    av_log(avctx, AV_LOG_ERROR,
-                           "Error while decoding band: %d, plane: %d\n", b, p);
-                    return -1;
-                }
-            }
-        }
-    }
-
-    //STOP_TIMER("decode_planes"); }
-
-    if (ctx->frame.data[0])
-        avctx->release_buffer(avctx, &ctx->frame);
-
-    ctx->frame.reference = 0;
-    if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return -1;
-    }
-
-    if (ctx->is_scalable) {
-        ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
-    } else {
-        ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
-    }
-
-    ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
-    ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
-
-    *data_size = sizeof(AVFrame);
-    *(AVFrame*)data = ctx->frame;
-
-    return buf_size;
-}
-
-
-/**
- *  Close Indeo5 decoder and clean up its context.
- */
-static av_cold int decode_close(AVCodecContext *avctx)
-{
-    IVI5DecContext *ctx = avctx->priv_data;
-
-    ff_ivi_free_buffers(&ctx->planes[0]);
-
-    if (ctx->mb_vlc.cust_tab.table)
-        ff_free_vlc(&ctx->mb_vlc.cust_tab);
-
-    if (ctx->frame.data[0])
-        avctx->release_buffer(avctx, &ctx->frame);
+    avctx->pix_fmt = PIX_FMT_YUV410P;
 
     return 0;
 }
@@ -826,9 +627,9 @@ AVCodec ff_indeo5_decoder = {
     .name           = "indeo5",
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = CODEC_ID_INDEO5,
-    .priv_data_size = sizeof(IVI5DecContext),
+    .priv_data_size = sizeof(IVI45DecContext),
     .init           = decode_init,
-    .close          = decode_close,
-    .decode         = decode_frame,
+    .close          = ff_ivi_decode_close,
+    .decode         = ff_ivi_decode_frame,
     .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
 };