From 11a32d53caa2c41b9f8c18a906a18b349e4e5cfd Mon Sep 17 00:00:00 2001 From: Baptiste Coudurier Date: Sun, 26 Jun 2011 14:08:22 -0700 Subject: dnxhddec: handle cid change in bitstream. --- libavcodec/dnxhddec.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'libavcodec/dnxhddec.c') diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c index 48932783c3..956196ce64 100644 --- a/libavcodec/dnxhddec.c +++ b/libavcodec/dnxhddec.c @@ -70,7 +70,7 @@ static av_cold int dnxhd_decode_init(AVCodecContext *avctx) static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) { - if (!ctx->cid_table) { + if (cid != ctx->cid) { int index; if ((index = ff_dnxhd_get_cid_table(cid)) < 0) { @@ -78,6 +78,11 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) return -1; } ctx->cid_table = &ff_dnxhd_cid_table[index]; + + free_vlc(&ctx->ac_vlc); + free_vlc(&ctx->dc_vlc); + free_vlc(&ctx->run_vlc); + init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257, ctx->cid_table->ac_bits, 1, 1, ctx->cid_table->ac_codes, 2, 2, 0); @@ -89,6 +94,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) ctx->cid_table->run_codes, 2, 2, 0); ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct); + ctx->cid = cid; } return 0; } @@ -96,7 +102,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_size, int first_field) { static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 }; - int i; + int i, cid; if (buf_size < 0x280) return -1; @@ -135,10 +141,10 @@ static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_si } } - ctx->cid = AV_RB32(buf + 0x28); - av_dlog(ctx->avctx, "compression id %d\n", ctx->cid); + cid = AV_RB32(buf + 0x28); + av_dlog(ctx->avctx, "compression id %d\n", cid); - if (dnxhd_init_vlc(ctx, ctx->cid) < 0) + if (dnxhd_init_vlc(ctx, cid) < 0) return -1; if (buf_size < ctx->cid_table->coding_unit_size) { -- cgit v1.2.3