Support the Hap chunked frame format

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 35 insertions, 3 deletions

diff --git a/libavcodec/hap.h b/libavcodec/hap.h
index a0fc2e0bf3..9d847f7b86 100644
--- a/libavcodec/hap.h
+++ b/libavcodec/hap.h
@@ -1,6 +1,7 @@
 /*
  * Vidvox Hap
  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
+ * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
  *
  * This file is part of Libav.
  *
@@ -41,20 +42,39 @@ enum HapCompressor {
     HAP_COMP_COMPLEX = 0xC0,
 };
 
+enum HapSectionType {
+    HAP_ST_DECODE_INSTRUCTIONS = 0x01,
+    HAP_ST_COMPRESSOR_TABLE    = 0x02,
+    HAP_ST_SIZE_TABLE          = 0x03,
+    HAP_ST_OFFSET_TABLE        = 0x04,
+};
+
+typedef struct HapChunk {
+    enum HapCompressor compressor;
+    int compressed_offset;
+    size_t compressed_size;
+    int uncompressed_offset;
+    size_t uncompressed_size;
+} HapChunk;
+
 typedef struct HapContext {
     AVClass *class;
 
     TextureDSPContext dxtc;
     GetByteContext gbc;
 
-    int section_type;        /* Header type */
+    enum HapTextureFormat opt_tex_fmt; /* Texture type (encoder only) */
+    int opt_chunk_count; /* User-requested chunk count (encoder only) */
+
+    int chunk_count;
+    HapChunk *chunks;
+    int *chunk_results;      /* Results from threaded operations */
 
     int tex_rat;             /* Compression ratio */
     const uint8_t *tex_data; /* Compressed texture */
-    uint8_t *tex_buf;        /* Uncompressed texture */
+    uint8_t *tex_buf;        /* Buffer for compressed texture */
     size_t tex_size;         /* Size of the compressed texture */
 
-    uint8_t *snappied;       /* Buffer interacting with snappy */
     size_t max_snappy;       /* Maximum compressed size for snappy buffer */
 
     int slice_count;         /* Number of slices for threaded operations */
@@ -63,4 +83,16 @@ typedef struct HapContext {
     int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
 } HapContext;
 
+/*
+ * Set the number of chunks in the frame. Returns 0 on success or an error if:
+ * - first_in_frame is 0 and the number of chunks has changed
+ * - any other error occurs
+ */
+int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame);
+
+/*
+ * Free resources associated with the context
+ */
+av_cold void ff_hap_free_context(HapContext *ctx);
+
 #endif /* AVCODEC_HAP_H */