Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 512 insertions, 0 deletions

diff --git a/third_party/aom/common/obudec.c b/third_party/aom/common/obudec.c
new file mode 100644
index 0000000000..8b7bd39a60
--- /dev/null
+++ b/third_party/aom/common/obudec.c
@@ -0,0 +1,512 @@
+/*
+ * Copyright (c) 2017, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "common/obudec.h"
+
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom_ports/mem_ops.h"
+#include "av1/common/common.h"
+#include "av1/common/obu_util.h"
+#include "tools_common.h"
+
+#define OBU_BUFFER_SIZE (500 * 1024)
+
+#define OBU_HEADER_SIZE 1
+#define OBU_EXTENSION_SIZE 1
+#define OBU_MAX_LENGTH_FIELD_SIZE 8
+
+#define OBU_MAX_HEADER_SIZE \
+  (OBU_HEADER_SIZE + OBU_EXTENSION_SIZE + 2 * OBU_MAX_LENGTH_FIELD_SIZE)
+
+#define OBU_DETECTION_SIZE \
+  (OBU_HEADER_SIZE + OBU_EXTENSION_SIZE + 4 * OBU_MAX_LENGTH_FIELD_SIZE)
+
+// Reads unsigned LEB128 integer and returns 0 upon successful read and decode.
+// Stores raw bytes in 'value_buffer', length of the number in 'value_length',
+// and decoded value in 'value'. If 'buffered' is true, it is buffered in the
+// detect buffer first.
+static int obudec_read_leb128(struct AvxInputContext *input_ctx,
+                              uint8_t *value_buffer, size_t *value_length,
+                              uint64_t *value, bool buffered) {
+  if (!input_ctx || !value_buffer || !value_length || !value) return -1;
+  size_t len;
+  for (len = 0; len < OBU_MAX_LENGTH_FIELD_SIZE; ++len) {
+    const size_t num_read =
+        buffer_input(input_ctx, 1, &value_buffer[len], buffered);
+    if (num_read == 0) {
+      if (len == 0 && input_eof(input_ctx)) {
+        *value_length = 0;
+        return 0;
+      }
+      // Ran out of data before completing read of value.
+      return -1;
+    }
+    if ((value_buffer[len] >> 7) == 0) {
+      ++len;
+      *value_length = len;
+      break;
+    }
+  }
+
+  return aom_uleb_decode(value_buffer, len, value, NULL);
+}
+
+// Reads OBU header from 'input_ctx'. The 'buffer_capacity' passed in must be
+// large enough to store an OBU header with extension (2 bytes). Raw OBU data is
+// written to 'obu_data', parsed OBU header values are written to 'obu_header',
+// and total bytes read from file are written to 'bytes_read'. Returns 0 for
+// success, and non-zero on failure. When end of file is reached, the return
+// value is 0 and the 'bytes_read' value is set to 0. If 'buffered' is true, it
+// is buffered in the detect buffer first.
+static int obudec_read_obu_header(struct AvxInputContext *input_ctx,
+                                  size_t buffer_capacity, int is_annexb,
+                                  uint8_t *obu_data, ObuHeader *obu_header,
+                                  size_t *bytes_read, bool buffered) {
+  if (!input_ctx || buffer_capacity < (OBU_HEADER_SIZE + OBU_EXTENSION_SIZE) ||
+      !obu_data || !obu_header || !bytes_read) {
+    return -1;
+  }
+  *bytes_read = buffer_input(input_ctx, 1, obu_data, buffered);
+
+  if (input_eof(input_ctx) && *bytes_read == 0) {
+    return 0;
+  } else if (*bytes_read != 1) {
+    fprintf(stderr, "obudec: Failure reading OBU header.\n");
+    return -1;
+  }
+
+  const int has_extension = (obu_data[0] >> 2) & 0x1;
+  if (has_extension) {
+    if (buffer_input(input_ctx, 1, &obu_data[1], buffered) != 1) {
+      fprintf(stderr, "obudec: Failure reading OBU extension.");
+      return -1;
+    }
+    ++*bytes_read;
+  }
+
+  size_t obu_bytes_parsed = 0;
+  const aom_codec_err_t parse_result = aom_read_obu_header(
+      obu_data, *bytes_read, &obu_bytes_parsed, obu_header, is_annexb);
+  if (parse_result != AOM_CODEC_OK || *bytes_read != obu_bytes_parsed) {
+    fprintf(stderr, "obudec: Error parsing OBU header.\n");
+    return -1;
+  }
+
+  return 0;
+}
+
+// Reads OBU payload from 'input_ctx' and returns 0 for success when all payload
+// bytes are read from the file. Payload data is written to 'obu_data', and
+// actual bytes read added to 'bytes_read'. If 'buffered' is true, it is
+// buffered in the detect buffer first.
+static int obudec_read_obu_payload(struct AvxInputContext *input_ctx,
+                                   size_t payload_length, uint8_t *obu_data,
+                                   size_t *bytes_read, bool buffered) {
+  if (!input_ctx || payload_length == 0 || !obu_data || !bytes_read) return -1;
+
+  if (buffer_input(input_ctx, payload_length, obu_data, buffered) !=
+      payload_length) {
+    fprintf(stderr, "obudec: Failure reading OBU payload.\n");
+    return -1;
+  }
+
+  *bytes_read += payload_length;
+  return 0;
+}
+
+static int obudec_read_obu_header_and_size(
+    struct AvxInputContext *input_ctx, size_t buffer_capacity, int is_annexb,
+    uint8_t *buffer, size_t *bytes_read, size_t *payload_length,
+    ObuHeader *obu_header, bool buffered) {
+  const size_t kMinimumBufferSize = OBU_MAX_HEADER_SIZE;
+  if (!input_ctx || !buffer || !bytes_read || !payload_length || !obu_header ||
+      buffer_capacity < kMinimumBufferSize) {
+    return -1;
+  }
+
+  size_t leb128_length_obu = 0;
+  size_t leb128_length_payload = 0;
+  uint64_t obu_size = 0;
+  if (is_annexb) {
+    if (obudec_read_leb128(input_ctx, &buffer[0], &leb128_length_obu, &obu_size,
+                           buffered) != 0) {
+      fprintf(stderr, "obudec: Failure reading OBU size length.\n");
+      return -1;
+    } else if (leb128_length_obu == 0) {
+      *payload_length = 0;
+      return 0;
+    }
+    if (obu_size > UINT32_MAX) {
+      fprintf(stderr, "obudec: OBU payload length too large.\n");
+      return -1;
+    }
+  }
+
+  size_t header_size = 0;
+  if (obudec_read_obu_header(input_ctx, buffer_capacity - leb128_length_obu,
+                             is_annexb, buffer + leb128_length_obu, obu_header,
+                             &header_size, buffered) != 0) {
+    return -1;
+  } else if (header_size == 0) {
+    *payload_length = 0;
+    return 0;
+  }
+
+  if (!obu_header->has_size_field) {
+    assert(is_annexb);
+    if (obu_size < header_size) {
+      fprintf(stderr, "obudec: OBU size is too small.\n");
+      return -1;
+    }
+    *payload_length = (size_t)obu_size - header_size;
+  } else {
+    uint64_t u64_payload_length = 0;
+    if (obudec_read_leb128(input_ctx, &buffer[leb128_length_obu + header_size],
+                           &leb128_length_payload, &u64_payload_length,
+                           buffered) != 0) {
+      fprintf(stderr, "obudec: Failure reading OBU payload length.\n");
+      return -1;
+    }
+    if (u64_payload_length > UINT32_MAX) {
+      fprintf(stderr, "obudec: OBU payload length too large.\n");
+      return -1;
+    }
+
+    *payload_length = (size_t)u64_payload_length;
+  }
+
+  *bytes_read = leb128_length_obu + header_size + leb128_length_payload;
+  return 0;
+}
+
+static int obudec_grow_buffer(size_t growth_amount, uint8_t **obu_buffer,
+                              size_t *obu_buffer_capacity) {
+  if (!*obu_buffer || !obu_buffer_capacity || growth_amount == 0) {
+    return -1;
+  }
+
+  const size_t capacity = *obu_buffer_capacity;
+  if (SIZE_MAX - growth_amount < capacity) {
+    fprintf(stderr, "obudec: cannot grow buffer, capacity will roll over.\n");
+    return -1;
+  }
+
+  const size_t new_capacity = capacity + growth_amount;
+
+#if defined AOM_MAX_ALLOCABLE_MEMORY
+  if (new_capacity > AOM_MAX_ALLOCABLE_MEMORY) {
+    fprintf(stderr, "obudec: OBU size exceeds max alloc size.\n");
+    return -1;
+  }
+#endif
+
+  uint8_t *new_buffer = (uint8_t *)realloc(*obu_buffer, new_capacity);
+  if (!new_buffer) {
+    fprintf(stderr, "obudec: Failed to allocate compressed data buffer.\n");
+    return -1;
+  }
+
+  *obu_buffer = new_buffer;
+  *obu_buffer_capacity = new_capacity;
+  return 0;
+}
+
+static int obudec_read_one_obu(struct AvxInputContext *input_ctx,
+                               uint8_t **obu_buffer, size_t obu_bytes_buffered,
+                               size_t *obu_buffer_capacity, size_t *obu_length,
+                               ObuHeader *obu_header, int is_annexb,
+                               bool buffered) {
+  if (!input_ctx || !(*obu_buffer) || !obu_buffer_capacity || !obu_length ||
+      !obu_header) {
+    return -1;
+  }
+
+  size_t bytes_read = 0;
+  size_t obu_payload_length = 0;
+  size_t available_buffer_capacity = *obu_buffer_capacity - obu_bytes_buffered;
+
+  if (available_buffer_capacity < OBU_MAX_HEADER_SIZE) {
+    if (obudec_grow_buffer(AOMMAX(*obu_buffer_capacity, OBU_MAX_HEADER_SIZE),
+                           obu_buffer, obu_buffer_capacity) != 0) {
+      *obu_length = bytes_read;
+      return -1;
+    }
+    available_buffer_capacity +=
+        AOMMAX(*obu_buffer_capacity, OBU_MAX_HEADER_SIZE);
+  }
+
+  const int status = obudec_read_obu_header_and_size(
+      input_ctx, available_buffer_capacity, is_annexb,
+      *obu_buffer + obu_bytes_buffered, &bytes_read, &obu_payload_length,
+      obu_header, buffered);
+  if (status < 0) return status;
+
+  if (obu_payload_length > SIZE_MAX - bytes_read) return -1;
+
+  if (obu_payload_length > 256 * 1024 * 1024) {
+    fprintf(stderr, "obudec: Read invalid OBU size (%u)\n",
+            (unsigned int)obu_payload_length);
+    *obu_length = bytes_read + obu_payload_length;
+    return -1;
+  }
+
+  if (bytes_read + obu_payload_length > available_buffer_capacity &&
+      obudec_grow_buffer(AOMMAX(*obu_buffer_capacity, obu_payload_length),
+                         obu_buffer, obu_buffer_capacity) != 0) {
+    *obu_length = bytes_read + obu_payload_length;
+    return -1;
+  }
+
+  if (obu_payload_length > 0 &&
+      obudec_read_obu_payload(input_ctx, obu_payload_length,
+                              *obu_buffer + obu_bytes_buffered + bytes_read,
+                              &bytes_read, buffered) != 0) {
+    return -1;
+  }
+
+  *obu_length = bytes_read;
+  return 0;
+}
+
+int file_is_obu(struct ObuDecInputContext *obu_ctx) {
+  if (!obu_ctx || !obu_ctx->avx_ctx) return 0;
+
+  struct AvxInputContext *avx_ctx = obu_ctx->avx_ctx;
+  uint8_t detect_buf[OBU_DETECTION_SIZE] = { 0 };
+  const int is_annexb = obu_ctx->is_annexb;
+  size_t payload_length = 0;
+  ObuHeader obu_header;
+  memset(&obu_header, 0, sizeof(obu_header));
+  size_t length_of_unit_size = 0;
+  size_t annexb_header_length = 0;
+  uint64_t unit_size = 0;
+
+  if (is_annexb) {
+    // read the size of first temporal unit
+    if (obudec_read_leb128(avx_ctx, &detect_buf[0], &length_of_unit_size,
+                           &unit_size, /*buffered=*/true) != 0) {
+      fprintf(stderr, "obudec: Failure reading temporal unit header\n");
+      rewind_detect(avx_ctx);
+      return 0;
+    }
+
+    // read the size of first frame unit
+    if (obudec_read_leb128(avx_ctx, &detect_buf[length_of_unit_size],
+                           &annexb_header_length, &unit_size,
+                           /*buffered=*/true) != 0) {
+      fprintf(stderr, "obudec: Failure reading frame unit header\n");
+      rewind_detect(avx_ctx);
+      return 0;
+    }
+    annexb_header_length += length_of_unit_size;
+  }
+
+  size_t bytes_read = 0;
+  if (obudec_read_obu_header_and_size(
+          avx_ctx, OBU_DETECTION_SIZE - annexb_header_length, is_annexb,
+          &detect_buf[annexb_header_length], &bytes_read, &payload_length,
+          &obu_header, /*buffered=*/true) != 0) {
+    fprintf(stderr, "obudec: Failure reading first OBU.\n");
+    rewind_detect(avx_ctx);
+    return 0;
+  }
+
+  if (is_annexb) {
+    bytes_read += annexb_header_length;
+  }
+
+  if (obu_header.type != OBU_TEMPORAL_DELIMITER &&
+      obu_header.type != OBU_SEQUENCE_HEADER) {
+    rewind_detect(avx_ctx);
+    return 0;
+  }
+
+  if (obu_header.has_size_field) {
+    if (obu_header.type == OBU_TEMPORAL_DELIMITER && payload_length != 0) {
+      fprintf(
+          stderr,
+          "obudec: Invalid OBU_TEMPORAL_DELIMITER payload length (non-zero).");
+      rewind_detect(avx_ctx);
+      return 0;
+    }
+  } else if (!is_annexb) {
+    fprintf(stderr, "obudec: OBU size fields required, cannot decode input.\n");
+    rewind_detect(avx_ctx);
+    return 0;
+  }
+
+  // Appears that input is valid Section 5 AV1 stream.
+  obu_ctx->buffer = (uint8_t *)malloc(OBU_BUFFER_SIZE);
+  if (!obu_ctx->buffer) {
+    fprintf(stderr, "Out of memory.\n");
+    rewind_detect(avx_ctx);
+    return 0;
+  }
+  obu_ctx->buffer_capacity = OBU_BUFFER_SIZE;
+
+  memcpy(obu_ctx->buffer, &detect_buf[0], bytes_read);
+  obu_ctx->bytes_buffered = bytes_read;
+  // If the first OBU is a SEQUENCE_HEADER, then it will have a payload.
+  // We need to read this in so that our buffer only contains complete OBUs.
+  if (payload_length > 0) {
+    if (payload_length > (obu_ctx->buffer_capacity - bytes_read)) {
+      fprintf(stderr, "obudec: First OBU's payload is too large\n");
+      rewind_detect(avx_ctx);
+      obudec_free(obu_ctx);
+      return 0;
+    }
+
+    size_t payload_bytes = 0;
+    const int status = obudec_read_obu_payload(
+        avx_ctx, payload_length, &obu_ctx->buffer[bytes_read], &payload_bytes,
+        /*buffered=*/false);
+    if (status < 0) {
+      rewind_detect(avx_ctx);
+      obudec_free(obu_ctx);
+      return 0;
+    }
+    obu_ctx->bytes_buffered += payload_bytes;
+  }
+  return 1;
+}
+
+int obudec_read_temporal_unit(struct ObuDecInputContext *obu_ctx,
+                              uint8_t **buffer, size_t *bytes_read,
+                              size_t *buffer_size) {
+  FILE *f = obu_ctx->avx_ctx->file;
+  if (!f) return -1;
+
+  *buffer_size = 0;
+  *bytes_read = 0;
+
+  if (input_eof(obu_ctx->avx_ctx)) {
+    return 1;
+  }
+
+  size_t tu_size;
+  size_t obu_size = 0;
+  size_t length_of_temporal_unit_size = 0;
+  uint8_t tuheader[OBU_MAX_LENGTH_FIELD_SIZE] = { 0 };
+
+  if (obu_ctx->is_annexb) {
+    uint64_t size = 0;
+
+    if (obu_ctx->bytes_buffered == 0) {
+      if (obudec_read_leb128(obu_ctx->avx_ctx, &tuheader[0],
+                             &length_of_temporal_unit_size, &size,
+                             /*buffered=*/false) != 0) {
+        fprintf(stderr, "obudec: Failure reading temporal unit header\n");
+        return -1;
+      }
+      if (size == 0 && input_eof(obu_ctx->avx_ctx)) {
+        return 1;
+      }
+    } else {
+      // temporal unit size was already stored in buffer
+      if (aom_uleb_decode(obu_ctx->buffer, obu_ctx->bytes_buffered, &size,
+                          &length_of_temporal_unit_size) != 0) {
+        fprintf(stderr, "obudec: Failure reading temporal unit header\n");
+        return -1;
+      }
+    }
+
+    if (size > UINT32_MAX || size + length_of_temporal_unit_size > UINT32_MAX) {
+      fprintf(stderr, "obudec: TU too large.\n");
+      return -1;
+    }
+
+    size += length_of_temporal_unit_size;
+    tu_size = (size_t)size;
+  } else {
+    while (1) {
+      ObuHeader obu_header;
+      memset(&obu_header, 0, sizeof(obu_header));
+
+      if (obudec_read_one_obu(obu_ctx->avx_ctx, &obu_ctx->buffer,
+                              obu_ctx->bytes_buffered,
+                              &obu_ctx->buffer_capacity, &obu_size, &obu_header,
+                              0, /*buffered=*/false) != 0) {
+        fprintf(stderr, "obudec: read_one_obu failed in TU loop\n");
+        return -1;
+      }
+
+      if (obu_header.type == OBU_TEMPORAL_DELIMITER || obu_size == 0) {
+        tu_size = obu_ctx->bytes_buffered;
+        break;
+      } else {
+        obu_ctx->bytes_buffered += obu_size;
+      }
+    }
+  }
+
+#if defined AOM_MAX_ALLOCABLE_MEMORY
+  if (tu_size > AOM_MAX_ALLOCABLE_MEMORY) {
+    fprintf(stderr, "obudec: Temporal Unit size exceeds max alloc size.\n");
+    return -1;
+  }
+#endif
+  if (tu_size > 0) {
+    uint8_t *new_buffer = (uint8_t *)realloc(*buffer, tu_size);
+    if (!new_buffer) {
+      free(*buffer);
+      fprintf(stderr, "obudec: Out of memory.\n");
+      return -1;
+    }
+    *buffer = new_buffer;
+  }
+  *bytes_read = tu_size;
+  *buffer_size = tu_size;
+
+  if (!obu_ctx->is_annexb) {
+    memcpy(*buffer, obu_ctx->buffer, tu_size);
+
+    // At this point, (obu_ctx->buffer + obu_ctx->bytes_buffered + obu_size)
+    // points to the end of the buffer.
+    memmove(obu_ctx->buffer, obu_ctx->buffer + obu_ctx->bytes_buffered,
+            obu_size);
+    obu_ctx->bytes_buffered = obu_size;
+  } else {
+    if (!input_eof(obu_ctx->avx_ctx)) {
+      size_t data_size;
+      size_t offset;
+      if (!obu_ctx->bytes_buffered) {
+        data_size = tu_size - length_of_temporal_unit_size;
+        memcpy(*buffer, &tuheader[0], length_of_temporal_unit_size);
+        offset = length_of_temporal_unit_size;
+      } else {
+        const size_t copy_size = AOMMIN(obu_ctx->bytes_buffered, tu_size);
+        memcpy(*buffer, obu_ctx->buffer, copy_size);
+        offset = copy_size;
+        data_size = tu_size - copy_size;
+        obu_ctx->bytes_buffered -= copy_size;
+      }
+
+      if (read_from_input(obu_ctx->avx_ctx, data_size, *buffer + offset) !=
+          data_size) {
+        fprintf(stderr, "obudec: Failed to read full temporal unit\n");
+        return -1;
+      }
+    }
+  }
+  return 0;
+}
+
+void obudec_free(struct ObuDecInputContext *obu_ctx) {
+  free(obu_ctx->buffer);
+  obu_ctx->buffer = NULL;
+  obu_ctx->buffer_capacity = 0;
+  obu_ctx->bytes_buffered = 0;
+}